6162 lines
171 KiB
C
6162 lines
171 KiB
C
/*
|
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* tkImgPhoto.c --
|
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*
|
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* Implements images of type "photo" for Tk. Photo images are stored in
|
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* full color (32 bits per pixel including alpha channel) and displayed
|
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* using dithering if necessary.
|
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*
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* Copyright (c) 1994 The Australian National University.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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* Copyright (c) 2002-2003 Donal K. Fellows
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* Copyright (c) 2003 ActiveState Corporation.
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*
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* See the file "license.terms" for information on usage and redistribution of
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* this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* Author: Paul Mackerras (paulus@cs.anu.edu.au),
|
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* Department of Computer Science,
|
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* Australian National University.
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*/
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#include "tkInt.h"
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#include <ctype.h>
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|
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#ifdef __WIN32__
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#include "tkWinInt.h"
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#elif defined(__CYGWIN__)
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#include "tkUnixInt.h"
|
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#endif
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|
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/*
|
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* Declaration for internal Xlib function used here:
|
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*/
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extern int _XInitImageFuncPtrs(XImage *image);
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/*
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* A signed 8-bit integral type. If chars are unsigned and the compiler isn't
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* an ANSI one, then we have to use short instead (which wastes space) to get
|
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* signed behavior.
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*/
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#if defined(__STDC__) || defined(_AIX)
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typedef signed char schar;
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#else
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# ifndef __CHAR_UNSIGNED__
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typedef char schar;
|
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# else
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typedef short schar;
|
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# endif
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#endif
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/*
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* An unsigned 32-bit integral type, used for pixel values. We use int rather
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* than long here to accommodate those systems where longs are 64 bits.
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*/
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typedef unsigned int pixel;
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/*
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* The maximum number of pixels to transmit to the server in a single
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* XPutImage call.
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*/
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#define MAX_PIXELS 65536
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/*
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* The set of colors required to display a photo image in a window depends on:
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* - the visual used by the window
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* - the palette, which specifies how many levels of each primary color to
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* use, and
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* - the gamma value for the image.
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*
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* Pixel values allocated for specific colors are valid only for the colormap
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* in which they were allocated. Sets of pixel values allocated for displaying
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* photos are re-used in other windows if possible, that is, if the display,
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* colormap, palette and gamma values match. A hash table is used to locate
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* these sets of pixel values, using the following data structure as key:
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*/
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typedef struct {
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Display *display; /* Qualifies the colormap resource ID. */
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Colormap colormap; /* Colormap that the windows are using. */
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double gamma; /* Gamma exponent value for images. */
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Tk_Uid palette; /* Specifies how many shades of each primary
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* we want to allocate. */
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} ColorTableId;
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/*
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* For a particular (display, colormap, palette, gamma) combination, a data
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* structure of the following type is used to store the allocated pixel values
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* and other information:
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*/
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typedef struct ColorTable {
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ColorTableId id; /* Information used in selecting this color
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* table. */
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int flags; /* See below. */
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int refCount; /* Number of instances using this map. */
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int liveRefCount; /* Number of instances which are actually in
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* use, using this map. */
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int numColors; /* Number of colors allocated for this map. */
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XVisualInfo visualInfo; /* Information about the visual for windows
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* using this color table. */
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pixel redValues[256]; /* Maps 8-bit values of red intensity to a
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* pixel value or index in pixelMap. */
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pixel greenValues[256]; /* Ditto for green intensity. */
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pixel blueValues[256]; /* Ditto for blue intensity. */
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unsigned long *pixelMap; /* Actual pixel values allocated. */
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unsigned char colorQuant[3][256];
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/* Maps 8-bit intensities to quantized
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* intensities. The first index is 0 for red,
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* 1 for green, 2 for blue. */
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} ColorTable;
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/*
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* Bit definitions for the flags field of a ColorTable.
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* BLACK_AND_WHITE: 1 means only black and white colors are
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* available.
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* COLOR_WINDOW: 1 means a full 3-D color cube has been
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* allocated.
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* DISPOSE_PENDING: 1 means a call to DisposeColorTable has been
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* scheduled as an idle handler, but it hasn't
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* been invoked yet.
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* MAP_COLORS: 1 means pixel values should be mapped through
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* pixelMap.
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*/
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#ifdef COLOR_WINDOW
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#undef COLOR_WINDOW
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#endif
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#define BLACK_AND_WHITE 1
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#define COLOR_WINDOW 2
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#define DISPOSE_PENDING 4
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#define MAP_COLORS 8
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/*
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* Definition of the data associated with each photo image master.
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*/
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typedef struct PhotoMaster {
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Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means the
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* image is being deleted. */
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Tcl_Interp *interp; /* Interpreter associated with the application
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* using this image. */
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Tcl_Command imageCmd; /* Token for image command (used to delete it
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* when the image goes away). NULL means the
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* image command has already been deleted. */
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int flags; /* Sundry flags, defined below. */
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int width, height; /* Dimensions of image. */
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int userWidth, userHeight; /* User-declared image dimensions. */
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Tk_Uid palette; /* User-specified default palette for
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* instances of this image. */
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double gamma; /* Display gamma value to correct for. */
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char *fileString; /* Name of file to read into image. */
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Tcl_Obj *dataString; /* Object to use as contents of image. */
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Tcl_Obj *format; /* User-specified format of data in image file
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* or string value. */
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unsigned char *pix32; /* Local storage for 32-bit image. */
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int ditherX, ditherY; /* Location of first incorrectly dithered
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* pixel in image. */
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TkRegion validRegion; /* Tk region indicating which parts of the
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* image have valid image data. */
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struct PhotoInstance *instancePtr;
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/* First in the list of instances associated
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* with this master. */
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} PhotoMaster;
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/*
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* Bit definitions for the flags field of a PhotoMaster.
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* COLOR_IMAGE: 1 means that the image has different color
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* components.
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* IMAGE_CHANGED: 1 means that the instances of this image need
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* to be redithered.
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* COMPLEX_ALPHA: 1 means that the instances of this image have
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* alpha values that aren't 0 or 255, and so need
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* the copy-merge-replace renderer .
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*/
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#define COLOR_IMAGE 1
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#define IMAGE_CHANGED 2
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#define COMPLEX_ALPHA 4
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/*
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* Flag to OR with the compositing rule to indicate that the source, despite
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* having an alpha channel, has simple alpha.
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*/
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#define SOURCE_IS_SIMPLE_ALPHA_PHOTO 0x10000000
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/*
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* The following data structure represents all of the instances of a photo
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* image in windows on a given screen that are using the same colormap.
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*/
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typedef struct PhotoInstance {
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PhotoMaster *masterPtr; /* Pointer to master for image. */
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Display *display; /* Display for windows using this instance. */
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Colormap colormap; /* The image may only be used in windows with
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* this particular colormap. */
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struct PhotoInstance *nextPtr;
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/* Pointer to the next instance in the list of
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* instances associated with this master. */
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int refCount; /* Number of instances using this structure. */
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Tk_Uid palette; /* Palette for these particular instances. */
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double gamma; /* Gamma value for these instances. */
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Tk_Uid defaultPalette; /* Default palette to use if a palette is not
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* specified for the master. */
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ColorTable *colorTablePtr; /* Pointer to information about colors
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* allocated for image display in windows like
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* this one. */
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Pixmap pixels; /* X pixmap containing dithered image. */
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int width, height; /* Dimensions of the pixmap. */
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schar *error; /* Error image, used in dithering. */
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XImage *imagePtr; /* Image structure for converted pixels. */
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XVisualInfo visualInfo; /* Information about the visual that these
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* windows are using. */
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GC gc; /* Graphics context for writing images to the
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* pixmap. */
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} PhotoInstance;
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/*
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* The following data structure is used to return information from
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* ParseSubcommandOptions:
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*/
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struct SubcommandOptions {
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int options; /* Individual bits indicate which options were
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* specified - see below. */
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Tcl_Obj *name; /* Name specified without an option. */
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int fromX, fromY; /* Values specified for -from option. */
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int fromX2, fromY2; /* Second coordinate pair for -from option. */
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int toX, toY; /* Values specified for -to option. */
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int toX2, toY2; /* Second coordinate pair for -to option. */
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int zoomX, zoomY; /* Values specified for -zoom option. */
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int subsampleX, subsampleY; /* Values specified for -subsample option. */
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Tcl_Obj *format; /* Value specified for -format option. */
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XColor *background; /* Value specified for -background option. */
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int compositingRule; /* Value specified for -compositingrule
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* option. */
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};
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/*
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* Bit definitions for use with ParseSubcommandOptions: each bit is set in the
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* allowedOptions parameter on a call to ParseSubcommandOptions if that option
|
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* is allowed for the current photo image subcommand. On return, the bit is
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* set in the options field of the SubcommandOptions structure if that option
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* was specified.
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*
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* OPT_BACKGROUND: Set if -format option allowed/specified.
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* OPT_COMPOSITE: Set if -compositingrule option allowed/spec'd.
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* OPT_FORMAT: Set if -format option allowed/specified.
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* OPT_FROM: Set if -from option allowed/specified.
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* OPT_GRAYSCALE: Set if -grayscale option allowed/specified.
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* OPT_SHRINK: Set if -shrink option allowed/specified.
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* OPT_SUBSAMPLE: Set if -subsample option allowed/spec'd.
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* OPT_TO: Set if -to option allowed/specified.
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* OPT_ZOOM: Set if -zoom option allowed/specified.
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*/
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#define OPT_BACKGROUND 1
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#define OPT_COMPOSITE 2
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#define OPT_FORMAT 4
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#define OPT_FROM 8
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#define OPT_GRAYSCALE 0x10
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#define OPT_SHRINK 0x20
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#define OPT_SUBSAMPLE 0x40
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#define OPT_TO 0x80
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#define OPT_ZOOM 0x100
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/*
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* List of option names. The order here must match the order of declarations
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* of the OPT_* constants above.
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*/
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static const char *const optionNames[] = {
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"-background",
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"-compositingrule",
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"-format",
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"-from",
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"-grayscale",
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"-shrink",
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"-subsample",
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"-to",
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"-zoom",
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NULL
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};
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/*
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* Message to generate when an attempt to resize an image fails due to memory
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* problems.
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*/
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#define TK_PHOTO_ALLOC_FAILURE_MESSAGE \
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"not enough free memory for image buffer"
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/*
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* Functions used in the type record for photo images.
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*/
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static int ImgPhotoCreate(Tcl_Interp *interp, char *name,
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int objc, Tcl_Obj *CONST objv[],
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Tk_ImageType *typePtr, Tk_ImageMaster master,
|
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ClientData *clientDataPtr);
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static ClientData ImgPhotoGet(Tk_Window tkwin, ClientData clientData);
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static void ImgPhotoDisplay(ClientData clientData,
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Display *display, Drawable drawable,
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int imageX, int imageY, int width, int height,
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int drawableX, int drawableY);
|
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static void ImgPhotoFree(ClientData clientData, Display *display);
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static void ImgPhotoDelete(ClientData clientData);
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static int ImgPhotoPostscript(ClientData clientData,
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Tcl_Interp *interp, Tk_Window tkwin,
|
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Tk_PostscriptInfo psInfo, int x, int y, int width,
|
||
int height, int prepass);
|
||
|
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/*
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||
* The type record itself for photo images:
|
||
*/
|
||
|
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Tk_ImageType tkPhotoImageType = {
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"photo", /* name */
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ImgPhotoCreate, /* createProc */
|
||
ImgPhotoGet, /* getProc */
|
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ImgPhotoDisplay, /* displayProc */
|
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ImgPhotoFree, /* freeProc */
|
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ImgPhotoDelete, /* deleteProc */
|
||
ImgPhotoPostscript, /* postscriptProc */
|
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NULL /* nextPtr */
|
||
};
|
||
|
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typedef struct ThreadSpecificData {
|
||
Tk_PhotoImageFormat *formatList;
|
||
/* Pointer to the first in the list of known
|
||
* photo image formats.*/
|
||
Tk_PhotoImageFormat *oldFormatList;
|
||
/* Pointer to the first in the list of known
|
||
* photo image formats.*/
|
||
int initialized; /* Set to 1 if we've initialized the
|
||
* strucuture. */
|
||
} ThreadSpecificData;
|
||
static Tcl_ThreadDataKey dataKey;
|
||
|
||
/*
|
||
* Default configuration
|
||
*/
|
||
|
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#define DEF_PHOTO_GAMMA "1"
|
||
#define DEF_PHOTO_HEIGHT "0"
|
||
#define DEF_PHOTO_PALETTE ""
|
||
#define DEF_PHOTO_WIDTH "0"
|
||
|
||
/*
|
||
* Information used for parsing configuration specifications:
|
||
*/
|
||
|
||
static Tk_ConfigSpec configSpecs[] = {
|
||
{TK_CONFIG_STRING, "-file", NULL, NULL,
|
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NULL, Tk_Offset(PhotoMaster, fileString), TK_CONFIG_NULL_OK},
|
||
{TK_CONFIG_DOUBLE, "-gamma", NULL, NULL,
|
||
DEF_PHOTO_GAMMA, Tk_Offset(PhotoMaster, gamma), 0},
|
||
{TK_CONFIG_INT, "-height", NULL, NULL,
|
||
DEF_PHOTO_HEIGHT, Tk_Offset(PhotoMaster, userHeight), 0},
|
||
{TK_CONFIG_UID, "-palette", NULL, NULL,
|
||
DEF_PHOTO_PALETTE, Tk_Offset(PhotoMaster, palette), 0},
|
||
{TK_CONFIG_INT, "-width", NULL, NULL,
|
||
DEF_PHOTO_WIDTH, Tk_Offset(PhotoMaster, userWidth), 0},
|
||
{TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}
|
||
};
|
||
|
||
/*
|
||
* Hash table used to hash from (display, colormap, palette, gamma) to
|
||
* ColorTable address.
|
||
*/
|
||
|
||
static Tcl_HashTable imgPhotoColorHash;
|
||
static int imgPhotoColorHashInitialized;
|
||
#define N_COLOR_HASH (sizeof(ColorTableId) / sizeof(int))
|
||
|
||
/*
|
||
* Implementation of the Porter-Duff Source-Over compositing rule.
|
||
*/
|
||
|
||
#define PD_SRC_OVER(srcColor,srcAlpha,dstColor,dstAlpha) \
|
||
(srcColor*srcAlpha/255) + dstAlpha*(255-srcAlpha)/255*dstColor/255
|
||
#define PD_SRC_OVER_ALPHA(srcAlpha,dstAlpha) \
|
||
(srcAlpha + (255-srcAlpha)*dstAlpha/255)
|
||
|
||
/*
|
||
* Forward declarations
|
||
*/
|
||
|
||
static void PhotoFormatThreadExitProc(ClientData clientData);
|
||
static int ImgPhotoCmd(ClientData clientData, Tcl_Interp *interp,
|
||
int objc, Tcl_Obj *CONST objv[]);
|
||
static int ParseSubcommandOptions(
|
||
struct SubcommandOptions *optPtr,
|
||
Tcl_Interp *interp, int allowedOptions,
|
||
int *indexPtr, int objc, Tcl_Obj *const objv[]);
|
||
static void ImgPhotoCmdDeletedProc(ClientData clientData);
|
||
static int ImgPhotoConfigureMaster(Tcl_Interp *interp,
|
||
PhotoMaster *masterPtr, int objc,
|
||
Tcl_Obj *const objv[], int flags);
|
||
static void ImgPhotoConfigureInstance(PhotoInstance *instancePtr);
|
||
static int ToggleComplexAlphaIfNeeded(PhotoMaster *mPtr);
|
||
static void ImgPhotoBlendComplexAlpha(XImage *bgImg,
|
||
PhotoInstance *iPtr, int xOffset, int yOffset,
|
||
int width, int height);
|
||
static int ImgPhotoSetSize(PhotoMaster *masterPtr, int width,
|
||
int height);
|
||
static void ImgPhotoInstanceSetSize(PhotoInstance *instancePtr);
|
||
static int ImgStringWrite(Tcl_Interp *interp,
|
||
Tcl_Obj *formatString,
|
||
Tk_PhotoImageBlock *blockPtr);
|
||
static char * ImgGetPhoto(PhotoMaster *masterPtr,
|
||
Tk_PhotoImageBlock *blockPtr,
|
||
struct SubcommandOptions *optPtr);
|
||
static int IsValidPalette(PhotoInstance *instancePtr,
|
||
const char *palette);
|
||
static int CountBits(pixel mask);
|
||
static void GetColorTable(PhotoInstance *instancePtr);
|
||
static void FreeColorTable(ColorTable *colorPtr, int force);
|
||
static void AllocateColors(ColorTable *colorPtr);
|
||
static void DisposeColorTable(ClientData clientData);
|
||
static void DisposeInstance(ClientData clientData);
|
||
static int ReclaimColors(ColorTableId *id, int numColors);
|
||
static int MatchFileFormat(Tcl_Interp *interp, Tcl_Channel chan,
|
||
char *fileName, Tcl_Obj *formatString,
|
||
Tk_PhotoImageFormat **imageFormatPtr,
|
||
int *widthPtr, int *heightPtr, int *oldformat);
|
||
static int MatchStringFormat(Tcl_Interp *interp, Tcl_Obj *data,
|
||
Tcl_Obj *formatString,
|
||
Tk_PhotoImageFormat **imageFormatPtr,
|
||
int *widthPtr, int *heightPtr, int *oldformat);
|
||
static Tcl_ObjCmdProc * PhotoOptionFind(Tcl_Interp *interp, Tcl_Obj *obj);
|
||
static void DitherInstance(PhotoInstance *instancePtr, int x,
|
||
int y, int width, int height);
|
||
static void PhotoOptionCleanupProc(ClientData clientData,
|
||
Tcl_Interp *interp);
|
||
|
||
#undef MIN
|
||
#define MIN(a, b) ((a) < (b)? (a): (b))
|
||
#undef MAX
|
||
#define MAX(a, b) ((a) > (b)? (a): (b))
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* PhotoFormatThreadExitProc --
|
||
*
|
||
* Clean up the registered list of photo formats.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The thread's linked lists of photo image formats is deleted.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
PhotoFormatThreadExitProc(
|
||
ClientData clientData) /* not used */
|
||
{
|
||
Tk_PhotoImageFormat *freePtr;
|
||
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
||
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
||
|
||
while (tsdPtr->oldFormatList != NULL) {
|
||
freePtr = tsdPtr->oldFormatList;
|
||
tsdPtr->oldFormatList = tsdPtr->oldFormatList->nextPtr;
|
||
ckfree((char *) freePtr);
|
||
}
|
||
while (tsdPtr->formatList != NULL) {
|
||
freePtr = tsdPtr->formatList;
|
||
tsdPtr->formatList = tsdPtr->formatList->nextPtr;
|
||
ckfree((char *) freePtr->name);
|
||
ckfree((char *) freePtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_CreateOldPhotoImageFormat, Tk_CreatePhotoImageFormat --
|
||
*
|
||
* This function is invoked by an image file handler to register a new
|
||
* photo image format and the functions that handle the new format. The
|
||
* function is typically invoked during Tcl_AppInit.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The new image file format is entered into a table used in the photo
|
||
* image "read" and "write" subcommands.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_CreateOldPhotoImageFormat(
|
||
Tk_PhotoImageFormat *formatPtr)
|
||
/* Structure describing the format. All of the
|
||
* fields except "nextPtr" must be filled in
|
||
* by caller. */
|
||
{
|
||
Tk_PhotoImageFormat *copyPtr;
|
||
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
||
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
||
|
||
if (!tsdPtr->initialized) {
|
||
tsdPtr->initialized = 1;
|
||
Tcl_CreateThreadExitHandler(PhotoFormatThreadExitProc, NULL);
|
||
}
|
||
copyPtr = (Tk_PhotoImageFormat *) ckalloc(sizeof(Tk_PhotoImageFormat));
|
||
*copyPtr = *formatPtr;
|
||
copyPtr->nextPtr = tsdPtr->oldFormatList;
|
||
tsdPtr->oldFormatList = copyPtr;
|
||
}
|
||
|
||
void
|
||
Tk_CreatePhotoImageFormat(
|
||
Tk_PhotoImageFormat *formatPtr)
|
||
/* Structure describing the format. All of the
|
||
* fields except "nextPtr" must be filled in
|
||
* by caller. */
|
||
{
|
||
Tk_PhotoImageFormat *copyPtr;
|
||
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
||
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
||
|
||
if (!tsdPtr->initialized) {
|
||
tsdPtr->initialized = 1;
|
||
Tcl_CreateThreadExitHandler(PhotoFormatThreadExitProc, NULL);
|
||
}
|
||
copyPtr = (Tk_PhotoImageFormat *) ckalloc(sizeof(Tk_PhotoImageFormat));
|
||
*copyPtr = *formatPtr;
|
||
if (isupper((unsigned char) *formatPtr->name)) {
|
||
copyPtr->nextPtr = tsdPtr->oldFormatList;
|
||
tsdPtr->oldFormatList = copyPtr;
|
||
} else {
|
||
/* for compatibility with aMSN: make a copy of formatPtr->name */
|
||
char *name = ckalloc(strlen(formatPtr->name) + 1);
|
||
strcpy(name, formatPtr->name);
|
||
copyPtr->name = name;
|
||
copyPtr->nextPtr = tsdPtr->formatList;
|
||
tsdPtr->formatList = copyPtr;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoCreate --
|
||
*
|
||
* This function is called by the Tk image code to create a new photo
|
||
* image.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* The data structure for a new photo image is allocated and initialized.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoCreate(
|
||
Tcl_Interp *interp, /* Interpreter for application containing
|
||
* image. */
|
||
char *name, /* Name to use for image. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *CONST objv[], /* Argument objects for options (doesn't
|
||
* include image name or type). */
|
||
Tk_ImageType *typePtr, /* Pointer to our type record (not used). */
|
||
Tk_ImageMaster master, /* Token for image, to be used by us in later
|
||
* callbacks. */
|
||
ClientData *clientDataPtr) /* Store manager's token for image here; it
|
||
* will be returned in later callbacks. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
|
||
/*
|
||
* Allocate and initialize the photo image master record.
|
||
*/
|
||
|
||
masterPtr = (PhotoMaster *) ckalloc(sizeof(PhotoMaster));
|
||
memset(masterPtr, 0, sizeof(PhotoMaster));
|
||
masterPtr->tkMaster = master;
|
||
masterPtr->interp = interp;
|
||
masterPtr->imageCmd = Tcl_CreateObjCommand(interp, name, ImgPhotoCmd,
|
||
(ClientData) masterPtr, ImgPhotoCmdDeletedProc);
|
||
masterPtr->palette = NULL;
|
||
masterPtr->pix32 = NULL;
|
||
masterPtr->instancePtr = NULL;
|
||
masterPtr->validRegion = TkCreateRegion();
|
||
|
||
/*
|
||
* Process configuration options given in the image create command.
|
||
*/
|
||
|
||
if (ImgPhotoConfigureMaster(interp, masterPtr, objc, objv, 0) != TCL_OK) {
|
||
ImgPhotoDelete((ClientData) masterPtr);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
*clientDataPtr = (ClientData) masterPtr;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoCmd --
|
||
*
|
||
* This function is invoked to process the Tcl command that corresponds
|
||
* to a photo image. See the user documentation for details on what it
|
||
* does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoCmd(
|
||
ClientData clientData, /* Information about photo master. */
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *CONST objv[]) /* Argument objects. */
|
||
{
|
||
static const char *photoOptions[] = {
|
||
"blank", "cget", "configure", "copy", "data", "get", "put",
|
||
"read", "redither", "transparency", "write", NULL
|
||
};
|
||
enum PhotoOptions {
|
||
PHOTO_BLANK, PHOTO_CGET, PHOTO_CONFIGURE, PHOTO_COPY, PHOTO_DATA,
|
||
PHOTO_GET, PHOTO_PUT, PHOTO_READ, PHOTO_REDITHER, PHOTO_TRANS,
|
||
PHOTO_WRITE
|
||
};
|
||
|
||
PhotoMaster *masterPtr = (PhotoMaster *) clientData;
|
||
int result, index, x, y, width, height, dataWidth, dataHeight, listObjc;
|
||
struct SubcommandOptions options;
|
||
Tcl_Obj **listObjv, **srcObjv;
|
||
unsigned char *pixelPtr;
|
||
Tk_PhotoImageBlock block;
|
||
Tk_Window tkwin;
|
||
Tk_PhotoImageFormat *imageFormat;
|
||
int imageWidth, imageHeight, matched, length, oldformat = 0;
|
||
Tcl_Channel chan;
|
||
Tk_PhotoHandle srcHandle;
|
||
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
||
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
||
|
||
if (objc < 2) {
|
||
Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (Tcl_GetIndexFromObj(interp, objv[1], photoOptions, "option", 0,
|
||
&index) != TCL_OK) {
|
||
Tcl_ObjCmdProc *proc;
|
||
proc = PhotoOptionFind(interp, objv[1]);
|
||
if (proc == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return proc(clientData, interp, objc, objv);
|
||
}
|
||
|
||
switch ((enum PhotoOptions) index) {
|
||
case PHOTO_BLANK:
|
||
/*
|
||
* photo blank command - just call Tk_PhotoBlank.
|
||
*/
|
||
|
||
if (objc == 2) {
|
||
Tk_PhotoBlank(masterPtr);
|
||
return TCL_OK;
|
||
} else {
|
||
Tcl_WrongNumArgs(interp, 2, objv, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
case PHOTO_CGET: {
|
||
char *arg;
|
||
|
||
if (objc != 3) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "option");
|
||
return TCL_ERROR;
|
||
}
|
||
arg = Tcl_GetStringFromObj(objv[2], &length);
|
||
if (strncmp(arg,"-data", (unsigned) length) == 0) {
|
||
if (masterPtr->dataString) {
|
||
Tcl_SetObjResult(interp, masterPtr->dataString);
|
||
}
|
||
} else if (strncmp(arg,"-format", (unsigned) length) == 0) {
|
||
if (masterPtr->format) {
|
||
Tcl_SetObjResult(interp, masterPtr->format);
|
||
}
|
||
} else {
|
||
Tk_ConfigureValue(interp, Tk_MainWindow(interp), configSpecs,
|
||
(char *) masterPtr, Tcl_GetString(objv[2]), 0);
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
case PHOTO_CONFIGURE:
|
||
/*
|
||
* photo configure command - handle this in the standard way.
|
||
*/
|
||
|
||
if (objc == 2) {
|
||
Tcl_Obj *obj, *subobj;
|
||
|
||
result = Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
||
configSpecs, (char *) masterPtr, NULL, 0);
|
||
if (result != TCL_OK) {
|
||
return result;
|
||
}
|
||
obj = Tcl_NewObj();
|
||
subobj = Tcl_NewStringObj("-data {} {} {}", 14);
|
||
if (masterPtr->dataString) {
|
||
Tcl_ListObjAppendElement(NULL, subobj, masterPtr->dataString);
|
||
} else {
|
||
Tcl_AppendStringsToObj(subobj, " {}", NULL);
|
||
}
|
||
Tcl_ListObjAppendElement(interp, obj, subobj);
|
||
subobj = Tcl_NewStringObj("-format {} {} {}", 16);
|
||
if (masterPtr->format) {
|
||
Tcl_ListObjAppendElement(NULL, subobj, masterPtr->format);
|
||
} else {
|
||
Tcl_AppendStringsToObj(subobj, " {}", NULL);
|
||
}
|
||
Tcl_ListObjAppendElement(interp, obj, subobj);
|
||
Tcl_ListObjAppendList(interp, obj, Tcl_GetObjResult(interp));
|
||
Tcl_SetObjResult(interp, obj);
|
||
return TCL_OK;
|
||
|
||
} else if (objc == 3) {
|
||
char *arg = Tcl_GetStringFromObj(objv[2], &length);
|
||
|
||
if (length > 1 && !strncmp(arg, "-data", (unsigned) length)) {
|
||
Tcl_AppendResult(interp, "-data {} {} {}", NULL);
|
||
if (masterPtr->dataString) {
|
||
Tcl_ListObjAppendElement(interp, Tcl_GetObjResult(interp),
|
||
masterPtr->dataString);
|
||
} else {
|
||
Tcl_AppendResult(interp, " {}", NULL);
|
||
}
|
||
return TCL_OK;
|
||
} else if (length > 1 &&
|
||
!strncmp(arg, "-format", (unsigned) length)) {
|
||
Tcl_AppendResult(interp, "-format {} {} {}", NULL);
|
||
if (masterPtr->format) {
|
||
Tcl_ListObjAppendElement(interp, Tcl_GetObjResult(interp),
|
||
masterPtr->format);
|
||
} else {
|
||
Tcl_AppendResult(interp, " {}", NULL);
|
||
}
|
||
return TCL_OK;
|
||
} else {
|
||
return Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
||
configSpecs, (char *) masterPtr, arg, 0);
|
||
}
|
||
}
|
||
return ImgPhotoConfigureMaster(interp, masterPtr, objc-2, objv+2,
|
||
TK_CONFIG_ARGV_ONLY);
|
||
|
||
case PHOTO_COPY:
|
||
/*
|
||
* photo copy command - first parse options.
|
||
*/
|
||
|
||
index = 2;
|
||
memset(&options, 0, sizeof(options));
|
||
options.zoomX = options.zoomY = 1;
|
||
options.subsampleX = options.subsampleY = 1;
|
||
options.name = NULL;
|
||
options.compositingRule = TK_PHOTO_COMPOSITE_OVERLAY;
|
||
if (ParseSubcommandOptions(&options, interp,
|
||
OPT_FROM | OPT_TO | OPT_ZOOM | OPT_SUBSAMPLE | OPT_SHRINK |
|
||
OPT_COMPOSITE, &index, objc, objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (options.name == NULL || index < objc) {
|
||
Tcl_WrongNumArgs(interp, 2, objv,
|
||
"source-image ?-compositingrule rule? ?-from x1 y1 x2 y2? ?-to x1 y1 x2 y2? ?-zoom x y? ?-subsample x y?");
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Look for the source image and get a pointer to its image data.
|
||
* Check the values given for the -from option.
|
||
*/
|
||
|
||
srcHandle = Tk_FindPhoto(interp, Tcl_GetString(options.name));
|
||
if (srcHandle == NULL) {
|
||
Tcl_AppendResult(interp, "image \"",
|
||
Tcl_GetString(options.name), "\" doesn't",
|
||
" exist or is not a photo image", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tk_PhotoGetImage(srcHandle, &block);
|
||
if ((options.fromX2 > block.width) || (options.fromY2 > block.height)
|
||
|| (options.fromX2 > block.width)
|
||
|| (options.fromY2 > block.height)) {
|
||
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
||
"outside source image", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Hack to pass through the message that the place we're coming from
|
||
* has a simple alpha channel.
|
||
*/
|
||
|
||
if (!(((PhotoMaster *) srcHandle)->flags & COMPLEX_ALPHA)) {
|
||
options.compositingRule |= SOURCE_IS_SIMPLE_ALPHA_PHOTO;
|
||
}
|
||
|
||
/*
|
||
* Fill in default values for unspecified parameters.
|
||
*/
|
||
|
||
if (!(options.options & OPT_FROM) || (options.fromX2 < 0)) {
|
||
options.fromX2 = block.width;
|
||
options.fromY2 = block.height;
|
||
}
|
||
if (!(options.options & OPT_TO) || (options.toX2 < 0)) {
|
||
width = options.fromX2 - options.fromX;
|
||
if (options.subsampleX > 0) {
|
||
width = (width + options.subsampleX - 1) / options.subsampleX;
|
||
} else if (options.subsampleX == 0) {
|
||
width = 0;
|
||
} else {
|
||
width = (width - options.subsampleX - 1) / -options.subsampleX;
|
||
}
|
||
options.toX2 = options.toX + width * options.zoomX;
|
||
|
||
height = options.fromY2 - options.fromY;
|
||
if (options.subsampleY > 0) {
|
||
height = (height + options.subsampleY - 1)
|
||
/ options.subsampleY;
|
||
} else if (options.subsampleY == 0) {
|
||
height = 0;
|
||
} else {
|
||
height = (height - options.subsampleY - 1)
|
||
/ -options.subsampleY;
|
||
}
|
||
options.toY2 = options.toY + height * options.zoomY;
|
||
}
|
||
|
||
/*
|
||
* Set the destination image size if the -shrink option was specified.
|
||
*/
|
||
|
||
if (options.options & OPT_SHRINK) {
|
||
if (ImgPhotoSetSize(masterPtr, options.toX2,
|
||
options.toY2) != TCL_OK) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Copy the image data over using Tk_PhotoPutZoomedBlock.
|
||
*/
|
||
|
||
block.pixelPtr += options.fromX * block.pixelSize
|
||
+ options.fromY * block.pitch;
|
||
block.width = options.fromX2 - options.fromX;
|
||
block.height = options.fromY2 - options.fromY;
|
||
return Tk_PhotoPutZoomedBlock(interp, (Tk_PhotoHandle) masterPtr,
|
||
&block, options.toX, options.toY, options.toX2 - options.toX,
|
||
options.toY2 - options.toY, options.zoomX, options.zoomY,
|
||
options.subsampleX, options.subsampleY,
|
||
options.compositingRule);
|
||
|
||
case PHOTO_DATA: {
|
||
char *data;
|
||
|
||
/*
|
||
* photo data command - first parse and check any options given.
|
||
*/
|
||
|
||
Tk_ImageStringWriteProc *stringWriteProc = NULL;
|
||
|
||
index = 2;
|
||
memset(&options, 0, sizeof(options));
|
||
options.name = NULL;
|
||
options.format = NULL;
|
||
options.fromX = 0;
|
||
options.fromY = 0;
|
||
if (ParseSubcommandOptions(&options, interp,
|
||
OPT_FORMAT | OPT_FROM | OPT_GRAYSCALE | OPT_BACKGROUND,
|
||
&index, objc, objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.name != NULL) || (index < objc)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "?options?");
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.fromX > masterPtr->width)
|
||
|| (options.fromY > masterPtr->height)
|
||
|| (options.fromX2 > masterPtr->width)
|
||
|| (options.fromY2 > masterPtr->height)) {
|
||
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
||
"outside image", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Fill in default values for unspecified parameters.
|
||
*/
|
||
|
||
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
||
options.fromX2 = masterPtr->width;
|
||
options.fromY2 = masterPtr->height;
|
||
}
|
||
|
||
/*
|
||
* Search for an appropriate image string format handler.
|
||
*/
|
||
|
||
if (options.options & OPT_FORMAT) {
|
||
matched = 0;
|
||
for (imageFormat = tsdPtr->formatList; imageFormat != NULL;
|
||
imageFormat = imageFormat->nextPtr) {
|
||
if ((strncasecmp(Tcl_GetString(options.format),
|
||
imageFormat->name, strlen(imageFormat->name)) == 0)) {
|
||
matched = 1;
|
||
if (imageFormat->stringWriteProc != NULL) {
|
||
stringWriteProc = imageFormat->stringWriteProc;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (stringWriteProc == NULL) {
|
||
oldformat = 1;
|
||
for (imageFormat = tsdPtr->oldFormatList; imageFormat != NULL;
|
||
imageFormat = imageFormat->nextPtr) {
|
||
if ((strncasecmp(Tcl_GetString(options.format),
|
||
imageFormat->name,
|
||
strlen(imageFormat->name)) == 0)) {
|
||
matched = 1;
|
||
if (imageFormat->stringWriteProc != NULL) {
|
||
stringWriteProc = imageFormat->stringWriteProc;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if (stringWriteProc == NULL) {
|
||
Tcl_AppendResult(interp, "image string format \"",
|
||
Tcl_GetString(options.format), "\" is ",
|
||
(matched ? "not supported" : "unknown"), NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else {
|
||
stringWriteProc = ImgStringWrite;
|
||
}
|
||
|
||
/*
|
||
* Call the handler's string write function to write out the image.
|
||
*/
|
||
|
||
data = ImgGetPhoto(masterPtr, &block, &options);
|
||
|
||
if (oldformat) {
|
||
Tcl_DString buffer;
|
||
|
||
Tcl_DStringInit(&buffer);
|
||
result = ((int (*) (Tcl_Interp *interp,
|
||
Tcl_DString *dataPtr, char *formatString,
|
||
Tk_PhotoImageBlock *blockPtr)) stringWriteProc)
|
||
(interp, &buffer, Tcl_GetString(options.format), &block);
|
||
if (result == TCL_OK) {
|
||
Tcl_DStringResult(interp, &buffer);
|
||
} else {
|
||
Tcl_DStringFree(&buffer);
|
||
}
|
||
} else {
|
||
|
||
result = ((int (*) (Tcl_Interp *interp,
|
||
Tcl_Obj *formatString, Tk_PhotoImageBlock *blockPtr,
|
||
void *dummy)) stringWriteProc)
|
||
(interp, options.format, &block, NULL);
|
||
}
|
||
if (options.background) {
|
||
Tk_FreeColor(options.background);
|
||
}
|
||
if (data) {
|
||
ckfree(data);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
case PHOTO_GET: {
|
||
/*
|
||
* photo get command - first parse and check parameters.
|
||
*/
|
||
|
||
char string[TCL_INTEGER_SPACE * 3];
|
||
|
||
if (objc != 4) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "x y");
|
||
return TCL_ERROR;
|
||
}
|
||
if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK)
|
||
|| (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((x < 0) || (x >= masterPtr->width)
|
||
|| (y < 0) || (y >= masterPtr->height)) {
|
||
Tcl_AppendResult(interp, Tcl_GetString(objv[0]), " get: ",
|
||
"coordinates out of range", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Extract the value of the desired pixel and format it as a string.
|
||
*/
|
||
|
||
pixelPtr = masterPtr->pix32 + (y * masterPtr->width + x) * 4;
|
||
sprintf(string, "%d %d %d", pixelPtr[0], pixelPtr[1],
|
||
pixelPtr[2]);
|
||
Tcl_AppendResult(interp, string, NULL);
|
||
return TCL_OK;
|
||
}
|
||
|
||
case PHOTO_PUT:
|
||
/*
|
||
* photo put command - first parse the options and colors specified.
|
||
*/
|
||
|
||
index = 2;
|
||
memset(&options, 0, sizeof(options));
|
||
options.name = NULL;
|
||
if (ParseSubcommandOptions(&options, interp, OPT_TO|OPT_FORMAT,
|
||
&index, objc, objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.name == NULL) || (index < objc)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "data ?options?");
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (MatchStringFormat(interp, options.name ? objv[2]:NULL,
|
||
options.format, &imageFormat, &imageWidth,
|
||
&imageHeight, &oldformat) == TCL_OK) {
|
||
Tcl_Obj *format, *data;
|
||
|
||
if (((options.options & OPT_TO) == 0) || (options.toX2 < 0)) {
|
||
options.toX2 = options.toX + imageWidth;
|
||
options.toY2 = options.toY + imageHeight;
|
||
}
|
||
if (imageWidth > options.toX2 - options.toX) {
|
||
imageWidth = options.toX2 - options.toX;
|
||
}
|
||
if (imageHeight > options.toY2 - options.toY) {
|
||
imageHeight = options.toY2 - options.toY;
|
||
}
|
||
format = options.format;
|
||
data = objv[2];
|
||
if (oldformat) {
|
||
if (format) {
|
||
format = (Tcl_Obj *) Tcl_GetString(format);
|
||
}
|
||
data = (Tcl_Obj *) Tcl_GetString(data);
|
||
}
|
||
if ((*imageFormat->stringReadProc)(interp, data,
|
||
format, (Tk_PhotoHandle) masterPtr,
|
||
options.toX, options.toY, imageWidth, imageHeight,
|
||
0, 0) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
masterPtr->flags |= IMAGE_CHANGED;
|
||
return TCL_OK;
|
||
}
|
||
if (options.options & OPT_FORMAT) {
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_ResetResult(interp);
|
||
if (Tcl_ListObjGetElements(interp, options.name,
|
||
&dataHeight, &srcObjv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
tkwin = Tk_MainWindow(interp);
|
||
block.pixelPtr = NULL;
|
||
dataWidth = 0;
|
||
pixelPtr = NULL;
|
||
for (y = 0; y < dataHeight; ++y) {
|
||
if (Tcl_ListObjGetElements(interp, srcObjv[y],
|
||
&listObjc, &listObjv) != TCL_OK) {
|
||
break;
|
||
}
|
||
|
||
if (y == 0) {
|
||
if (listObjc == 0) {
|
||
/*
|
||
* Lines must be non-empty...
|
||
*/
|
||
|
||
break;
|
||
}
|
||
dataWidth = listObjc;
|
||
pixelPtr = (unsigned char *)
|
||
ckalloc((unsigned) dataWidth * dataHeight * 3);
|
||
block.pixelPtr = pixelPtr;
|
||
} else if (listObjc != dataWidth) {
|
||
Tcl_AppendResult(interp, "all elements of color list must",
|
||
" have the same number of elements", NULL);
|
||
break;
|
||
}
|
||
|
||
for (x = 0; x < dataWidth; ++x) {
|
||
char *colorString = Tcl_GetString(listObjv[x]);
|
||
XColor color;
|
||
int tmpr, tmpg, tmpb;
|
||
|
||
/*
|
||
* We do not use Tk_GetColorFromObj() because we absolutely do
|
||
* not want to invoke the fallback code.
|
||
*/
|
||
|
||
if (colorString[0] == '#') {
|
||
if (isxdigit(UCHAR(colorString[1])) &&
|
||
isxdigit(UCHAR(colorString[2])) &&
|
||
isxdigit(UCHAR(colorString[3]))) {
|
||
if (colorString[4] == '\0') {
|
||
/* Got #rgb */
|
||
sscanf(colorString+1, "%1x%1x%1x",
|
||
&tmpr, &tmpg, &tmpb);
|
||
*pixelPtr++ = tmpr * 0x11;
|
||
*pixelPtr++ = tmpg * 0x11;
|
||
*pixelPtr++ = tmpb * 0x11;
|
||
continue;
|
||
} else if (isxdigit(UCHAR(colorString[4])) &&
|
||
isxdigit(UCHAR(colorString[5])) &&
|
||
isxdigit(UCHAR(colorString[6])) &&
|
||
colorString[7] == '\0') {
|
||
/* Got #rrggbb */
|
||
sscanf(colorString+1, "%2x%2x%2x",
|
||
&tmpr, &tmpg, &tmpb);
|
||
*pixelPtr++ = tmpr;
|
||
*pixelPtr++ = tmpg;
|
||
*pixelPtr++ = tmpb;
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (!TkParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin),
|
||
colorString, &color)) {
|
||
Tcl_AppendResult(interp, "can't parse color \"",
|
||
colorString, "\"", NULL);
|
||
break;
|
||
}
|
||
*pixelPtr++ = color.red >> 8;
|
||
*pixelPtr++ = color.green >> 8;
|
||
*pixelPtr++ = color.blue >> 8;
|
||
}
|
||
if (x < dataWidth) {
|
||
break;
|
||
}
|
||
}
|
||
if (y < dataHeight || dataHeight == 0 || dataWidth == 0) {
|
||
if (block.pixelPtr != NULL) {
|
||
ckfree((char *) block.pixelPtr);
|
||
}
|
||
if (y < dataHeight) {
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
* Fill in default values for the -to option, then copy the block in
|
||
* using Tk_PhotoPutBlock.
|
||
*/
|
||
|
||
if (!(options.options & OPT_TO) || (options.toX2 < 0)) {
|
||
options.toX2 = options.toX + dataWidth;
|
||
options.toY2 = options.toY + dataHeight;
|
||
}
|
||
block.width = dataWidth;
|
||
block.height = dataHeight;
|
||
block.pitch = dataWidth * 3;
|
||
block.pixelSize = 3;
|
||
block.offset[0] = 0;
|
||
block.offset[1] = 1;
|
||
block.offset[2] = 2;
|
||
block.offset[3] = 0;
|
||
result = Tk_PhotoPutBlock(interp, (ClientData)masterPtr, &block,
|
||
options.toX, options.toY, options.toX2 - options.toX,
|
||
options.toY2 - options.toY,
|
||
TK_PHOTO_COMPOSITE_SET);
|
||
ckfree((char *) block.pixelPtr);
|
||
return result;
|
||
|
||
case PHOTO_READ: {
|
||
Tcl_Obj *format;
|
||
|
||
/*
|
||
* photo read command - first parse the options specified.
|
||
*/
|
||
|
||
index = 2;
|
||
memset(&options, 0, sizeof(options));
|
||
options.name = NULL;
|
||
options.format = NULL;
|
||
if (ParseSubcommandOptions(&options, interp,
|
||
OPT_FORMAT | OPT_FROM | OPT_TO | OPT_SHRINK,
|
||
&index, objc, objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.name == NULL) || (index < objc)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "fileName ?options?");
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Prevent file system access in safe interpreters.
|
||
*/
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_AppendResult(interp, "can't get image from a file in a",
|
||
" safe interpreter", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Open the image file and look for a handler for it.
|
||
*/
|
||
|
||
chan = Tcl_OpenFileChannel(interp,
|
||
Tcl_GetString(options.name), "r", 0);
|
||
if (chan == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_SetChannelOption(interp, chan, "-translation", "binary")
|
||
!= TCL_OK) {
|
||
Tcl_Close(NULL, chan);
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_SetChannelOption(interp, chan, "-encoding", "binary")
|
||
!= TCL_OK) {
|
||
Tcl_Close(NULL, chan);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (MatchFileFormat(interp, chan,
|
||
Tcl_GetString(options.name), options.format, &imageFormat,
|
||
&imageWidth, &imageHeight, &oldformat) != TCL_OK) {
|
||
Tcl_Close(NULL, chan);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Check the values given for the -from option.
|
||
*/
|
||
|
||
if ((options.fromX > imageWidth) || (options.fromY > imageHeight)
|
||
|| (options.fromX2 > imageWidth)
|
||
|| (options.fromY2 > imageHeight)) {
|
||
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
||
"outside source image", NULL);
|
||
Tcl_Close(NULL, chan);
|
||
return TCL_ERROR;
|
||
}
|
||
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
||
width = imageWidth - options.fromX;
|
||
height = imageHeight - options.fromY;
|
||
} else {
|
||
width = options.fromX2 - options.fromX;
|
||
height = options.fromY2 - options.fromY;
|
||
}
|
||
|
||
/*
|
||
* If the -shrink option was specified, set the size of the image.
|
||
*/
|
||
|
||
if (options.options & OPT_SHRINK) {
|
||
if (ImgPhotoSetSize(masterPtr, options.toX + width,
|
||
options.toY + height) != TCL_OK) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Call the handler's file read function to read the data into the
|
||
* image.
|
||
*/
|
||
|
||
format = options.format;
|
||
if (oldformat && format) {
|
||
format = (Tcl_Obj *) Tcl_GetString(format);
|
||
}
|
||
result = (*imageFormat->fileReadProc)(interp, chan,
|
||
Tcl_GetString(options.name),
|
||
format, (Tk_PhotoHandle) masterPtr, options.toX,
|
||
options.toY, width, height, options.fromX, options.fromY);
|
||
if (chan != NULL) {
|
||
Tcl_Close(NULL, chan);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
case PHOTO_REDITHER:
|
||
if (objc != 2) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Call Dither if any part of the image is not correctly dithered at
|
||
* present.
|
||
*/
|
||
|
||
x = masterPtr->ditherX;
|
||
y = masterPtr->ditherY;
|
||
if (masterPtr->ditherX != 0) {
|
||
Tk_DitherPhoto((Tk_PhotoHandle) masterPtr, x, y,
|
||
masterPtr->width - x, 1);
|
||
}
|
||
if (masterPtr->ditherY < masterPtr->height) {
|
||
x = 0;
|
||
Tk_DitherPhoto((Tk_PhotoHandle)masterPtr, 0,
|
||
masterPtr->ditherY, masterPtr->width,
|
||
masterPtr->height - masterPtr->ditherY);
|
||
}
|
||
|
||
if (y < masterPtr->height) {
|
||
/*
|
||
* Tell the core image code that part of the image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, x, y,
|
||
(masterPtr->width - x), (masterPtr->height - y),
|
||
masterPtr->width, masterPtr->height);
|
||
}
|
||
return TCL_OK;
|
||
|
||
case PHOTO_TRANS: {
|
||
static const char *photoTransOptions[] = {
|
||
"get", "set", NULL
|
||
};
|
||
enum transOptions {
|
||
PHOTO_TRANS_GET, PHOTO_TRANS_SET
|
||
};
|
||
|
||
if (objc < 3) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "option ?arg arg ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[2], photoTransOptions, "option",
|
||
0, &index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
switch ((enum transOptions) index) {
|
||
case PHOTO_TRANS_GET: {
|
||
XRectangle testBox;
|
||
TkRegion testRegion;
|
||
|
||
if (objc != 5) {
|
||
Tcl_WrongNumArgs(interp, 3, objv, "x y");
|
||
return TCL_ERROR;
|
||
}
|
||
if ((Tcl_GetIntFromObj(interp, objv[3], &x) != TCL_OK)
|
||
|| (Tcl_GetIntFromObj(interp, objv[4], &y) != TCL_OK)) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((x < 0) || (x >= masterPtr->width)
|
||
|| (y < 0) || (y >= masterPtr->height)) {
|
||
Tcl_AppendResult(interp, Tcl_GetString(objv[0]),
|
||
" transparency get: coordinates out of range", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
testBox.x = x;
|
||
testBox.y = y;
|
||
testBox.width = 1;
|
||
testBox.height = 1;
|
||
/* What a way to do a test! */
|
||
testRegion = TkCreateRegion();
|
||
TkUnionRectWithRegion(&testBox, testRegion, testRegion);
|
||
TkIntersectRegion(testRegion, masterPtr->validRegion, testRegion);
|
||
TkClipBox(testRegion, &testBox);
|
||
TkDestroyRegion(testRegion);
|
||
|
||
Tcl_SetBooleanObj(Tcl_GetObjResult(interp),
|
||
(testBox.width==0 && testBox.height==0));
|
||
return TCL_OK;
|
||
}
|
||
|
||
case PHOTO_TRANS_SET: {
|
||
int transFlag;
|
||
XRectangle setBox;
|
||
|
||
if (objc != 6) {
|
||
Tcl_WrongNumArgs(interp, 3, objv, "x y boolean");
|
||
return TCL_ERROR;
|
||
}
|
||
if ((Tcl_GetIntFromObj(interp, objv[3], &x) != TCL_OK)
|
||
|| (Tcl_GetIntFromObj(interp, objv[4], &y) != TCL_OK)
|
||
|| (Tcl_GetBooleanFromObj(interp, objv[5],
|
||
&transFlag) != TCL_OK)) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((x < 0) || (x >= masterPtr->width)
|
||
|| (y < 0) || (y >= masterPtr->height)) {
|
||
Tcl_AppendResult(interp, Tcl_GetString(objv[0]),
|
||
" transparency set: coordinates out of range", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
setBox.x = x;
|
||
setBox.y = y;
|
||
setBox.width = 1;
|
||
setBox.height = 1;
|
||
pixelPtr = masterPtr->pix32 + (y * masterPtr->width + x) * 4;
|
||
|
||
if (transFlag) {
|
||
/*
|
||
* Make pixel transparent.
|
||
*/
|
||
|
||
TkRegion clearRegion = TkCreateRegion();
|
||
|
||
TkUnionRectWithRegion(&setBox, clearRegion, clearRegion);
|
||
TkSubtractRegion(masterPtr->validRegion, clearRegion,
|
||
masterPtr->validRegion);
|
||
TkDestroyRegion(clearRegion);
|
||
|
||
/*
|
||
* Set the alpha value correctly.
|
||
*/
|
||
|
||
pixelPtr[3] = 0;
|
||
} else {
|
||
/*
|
||
* Make pixel opaque.
|
||
*/
|
||
|
||
TkUnionRectWithRegion(&setBox, masterPtr->validRegion,
|
||
masterPtr->validRegion);
|
||
pixelPtr[3] = 255;
|
||
}
|
||
|
||
/*
|
||
* Inform the generic image code that the image
|
||
* has (potentially) changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, x, y, 1, 1,
|
||
masterPtr->width, masterPtr->height);
|
||
masterPtr->flags &= ~IMAGE_CHANGED;
|
||
return TCL_OK;
|
||
}
|
||
|
||
}
|
||
Tcl_Panic("unexpected fallthrough");
|
||
}
|
||
|
||
case PHOTO_WRITE: {
|
||
char *data;
|
||
Tcl_Obj *format;
|
||
|
||
/*
|
||
* Prevent file system access in safe interpreters.
|
||
*/
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_AppendResult(interp, "can't write image to a file in a",
|
||
" safe interpreter", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* photo write command - first parse and check any options given.
|
||
*/
|
||
|
||
index = 2;
|
||
memset(&options, 0, sizeof(options));
|
||
options.name = NULL;
|
||
options.format = NULL;
|
||
if (ParseSubcommandOptions(&options, interp,
|
||
OPT_FORMAT | OPT_FROM | OPT_GRAYSCALE | OPT_BACKGROUND,
|
||
&index, objc, objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.name == NULL) || (index < objc)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "fileName ?options?");
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.fromX > masterPtr->width)
|
||
|| (options.fromY > masterPtr->height)
|
||
|| (options.fromX2 > masterPtr->width)
|
||
|| (options.fromY2 > masterPtr->height)) {
|
||
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
||
"outside image", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Fill in default values for unspecified parameters.
|
||
*/
|
||
|
||
if (!(options.options & OPT_FROM) || (options.fromX2 < 0)) {
|
||
options.fromX2 = masterPtr->width;
|
||
options.fromY2 = masterPtr->height;
|
||
}
|
||
|
||
/*
|
||
* Search for an appropriate image file format handler, and give an
|
||
* error if none is found.
|
||
*/
|
||
|
||
matched = 0;
|
||
for (imageFormat = tsdPtr->formatList; imageFormat != NULL;
|
||
imageFormat = imageFormat->nextPtr) {
|
||
if ((options.format == NULL)
|
||
|| (strncasecmp(Tcl_GetString(options.format),
|
||
imageFormat->name, strlen(imageFormat->name)) == 0)) {
|
||
matched = 1;
|
||
if (imageFormat->fileWriteProc != NULL) {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (imageFormat == NULL) {
|
||
oldformat = 1;
|
||
for (imageFormat = tsdPtr->oldFormatList; imageFormat != NULL;
|
||
imageFormat = imageFormat->nextPtr) {
|
||
if ((options.format == NULL)
|
||
|| (strncasecmp(Tcl_GetString(options.format),
|
||
imageFormat->name, strlen(imageFormat->name)) == 0)) {
|
||
matched = 1;
|
||
if (imageFormat->fileWriteProc != NULL) {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if (imageFormat == NULL) {
|
||
if (options.format == NULL) {
|
||
Tcl_AppendResult(interp, "no available image file format ",
|
||
"has file writing capability", NULL);
|
||
} else if (!matched) {
|
||
Tcl_AppendResult(interp, "image file format \"",
|
||
Tcl_GetString(options.format),
|
||
"\" is unknown", NULL);
|
||
} else {
|
||
Tcl_AppendResult(interp, "image file format \"",
|
||
Tcl_GetString(options.format),
|
||
"\" has no file writing capability", NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Call the handler's file write function to write out the image.
|
||
*/
|
||
|
||
data = ImgGetPhoto(masterPtr, &block, &options);
|
||
format = options.format;
|
||
if (oldformat && format) {
|
||
format = (Tcl_Obj *) Tcl_GetString(options.format);
|
||
}
|
||
result = (*imageFormat->fileWriteProc)(interp,
|
||
Tcl_GetString(options.name), format, &block);
|
||
if (options.background) {
|
||
Tk_FreeColor(options.background);
|
||
}
|
||
if (data) {
|
||
ckfree(data);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
}
|
||
Tcl_Panic("unexpected fallthrough");
|
||
return TCL_ERROR; /* NOT REACHED */
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ParseSubcommandOptions --
|
||
*
|
||
* This function is invoked to process one of the options which may be
|
||
* specified for the photo image subcommands, namely, -from, -to, -zoom,
|
||
* -subsample, -format, -shrink, and -compositingrule.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Fields in *optPtr get filled in.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ParseSubcommandOptions(
|
||
struct SubcommandOptions *optPtr,
|
||
/* Information about the options specified and
|
||
* the values given is returned here. */
|
||
Tcl_Interp *interp, /* Interpreter to use for reporting errors. */
|
||
int allowedOptions, /* Indicates which options are valid for the
|
||
* current command. */
|
||
int *optIndexPtr, /* Points to a variable containing the current
|
||
* index in objv; this variable is updated by
|
||
* this function. */
|
||
int objc, /* Number of arguments in objv[]. */
|
||
Tcl_Obj *const objv[]) /* Arguments to be parsed. */
|
||
{
|
||
int index, c, bit, currentBit, length;
|
||
int values[4], numValues, maxValues, argIndex;
|
||
char *option;
|
||
const char *const *listPtr;
|
||
|
||
for (index = *optIndexPtr; index < objc; *optIndexPtr = ++index) {
|
||
/*
|
||
* We can have one value specified without an option; it goes into
|
||
* optPtr->name.
|
||
*/
|
||
|
||
option = Tcl_GetStringFromObj(objv[index], &length);
|
||
if (option[0] != '-') {
|
||
if (optPtr->name == NULL) {
|
||
optPtr->name = objv[index];
|
||
continue;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* Work out which option this is.
|
||
*/
|
||
|
||
c = option[0];
|
||
bit = 0;
|
||
currentBit = 1;
|
||
for (listPtr = optionNames; *listPtr != NULL; ++listPtr) {
|
||
if ((c == *listPtr[0])
|
||
&& (strncmp(option, *listPtr, (size_t) length) == 0)) {
|
||
if (bit != 0) {
|
||
bit = 0; /* An ambiguous option. */
|
||
break;
|
||
}
|
||
bit = currentBit;
|
||
}
|
||
currentBit <<= 1;
|
||
}
|
||
|
||
/*
|
||
* If this option is not recognized and allowed, put an error message
|
||
* in the interpreter and return.
|
||
*/
|
||
|
||
if ((allowedOptions & bit) == 0) {
|
||
Tcl_AppendResult(interp, "unrecognized option \"",
|
||
Tcl_GetString(objv[index]),
|
||
"\": must be ", NULL);
|
||
bit = 1;
|
||
for (listPtr = optionNames; *listPtr != NULL; ++listPtr) {
|
||
if ((allowedOptions & bit) != 0) {
|
||
if ((allowedOptions & (bit - 1)) != 0) {
|
||
Tcl_AppendResult(interp, ", ", NULL);
|
||
if ((allowedOptions & ~((bit << 1) - 1)) == 0) {
|
||
Tcl_AppendResult(interp, "or ", NULL);
|
||
}
|
||
}
|
||
Tcl_AppendResult(interp, *listPtr, NULL);
|
||
}
|
||
bit <<= 1;
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* For the -from, -to, -zoom and -subsample options, parse the values
|
||
* given. Report an error if too few or too many values are given.
|
||
*/
|
||
|
||
if (bit == OPT_BACKGROUND) {
|
||
/*
|
||
* The -background option takes a single XColor value.
|
||
*/
|
||
|
||
if (index + 1 < objc) {
|
||
*optIndexPtr = ++index;
|
||
optPtr->background = Tk_GetColor(interp, Tk_MainWindow(interp),
|
||
Tk_GetUid(Tcl_GetString(objv[index])));
|
||
if (!optPtr->background) {
|
||
return TCL_ERROR;
|
||
}
|
||
} else {
|
||
Tcl_AppendResult(interp, "the \"-background\" option ",
|
||
"requires a value", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else if (bit == OPT_FORMAT) {
|
||
/*
|
||
* The -format option takes a single string value. Note that
|
||
* parsing this is outside the scope of this function.
|
||
*/
|
||
|
||
if (index + 1 < objc) {
|
||
*optIndexPtr = ++index;
|
||
optPtr->format = objv[index];
|
||
} else {
|
||
Tcl_AppendResult(interp, "the \"-format\" option ",
|
||
"requires a value", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else if (bit == OPT_COMPOSITE) {
|
||
/*
|
||
* The -compositingrule option takes a single value from a
|
||
* well-known set.
|
||
*/
|
||
|
||
if (index + 1 < objc) {
|
||
/*
|
||
* Note that these must match the TK_PHOTO_COMPOSITE_*
|
||
* constants.
|
||
*/
|
||
|
||
static const char *compositingRules[] = {
|
||
"overlay", "set", NULL
|
||
};
|
||
|
||
index++;
|
||
if (Tcl_GetIndexFromObj(interp, objv[index], compositingRules,
|
||
"compositing rule", 0, &optPtr->compositingRule)
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
*optIndexPtr = index;
|
||
} else {
|
||
Tcl_AppendResult(interp, "the \"-compositingrule\" option ",
|
||
"requires a value", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else if ((bit != OPT_SHRINK) && (bit != OPT_GRAYSCALE)) {
|
||
char *val;
|
||
maxValues = ((bit == OPT_FROM) || (bit == OPT_TO))? 4: 2;
|
||
argIndex = index + 1;
|
||
for (numValues = 0; numValues < maxValues; ++numValues) {
|
||
if (argIndex >= objc) {
|
||
break;
|
||
}
|
||
val = Tcl_GetString(objv[argIndex]);
|
||
if ((argIndex < objc) && (isdigit(UCHAR(val[0]))
|
||
|| ((val[0] == '-') && isdigit(UCHAR(val[1]))))) {
|
||
if (Tcl_GetInt(interp, val, &values[numValues])
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
} else {
|
||
break;
|
||
}
|
||
++argIndex;
|
||
}
|
||
|
||
if (numValues == 0) {
|
||
Tcl_AppendResult(interp, "the \"", option, "\" option ",
|
||
"requires one ", maxValues == 2? "or two": "to four",
|
||
" integer values", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
*optIndexPtr = (index += numValues);
|
||
|
||
/*
|
||
* Y values default to the corresponding X value if not specified.
|
||
*/
|
||
|
||
if (numValues == 1) {
|
||
values[1] = values[0];
|
||
}
|
||
if (numValues == 3) {
|
||
values[3] = values[2];
|
||
}
|
||
|
||
/*
|
||
* Check the values given and put them in the appropriate field of
|
||
* the SubcommandOptions structure.
|
||
*/
|
||
|
||
switch (bit) {
|
||
case OPT_FROM:
|
||
if ((values[0] < 0) || (values[1] < 0) || ((numValues > 2)
|
||
&& ((values[2] < 0) || (values[3] < 0)))) {
|
||
Tcl_AppendResult(interp, "value(s) for the -from",
|
||
" option must be non-negative", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (numValues <= 2) {
|
||
optPtr->fromX = values[0];
|
||
optPtr->fromY = values[1];
|
||
optPtr->fromX2 = -1;
|
||
optPtr->fromY2 = -1;
|
||
} else {
|
||
optPtr->fromX = MIN(values[0], values[2]);
|
||
optPtr->fromY = MIN(values[1], values[3]);
|
||
optPtr->fromX2 = MAX(values[0], values[2]);
|
||
optPtr->fromY2 = MAX(values[1], values[3]);
|
||
}
|
||
break;
|
||
case OPT_SUBSAMPLE:
|
||
optPtr->subsampleX = values[0];
|
||
optPtr->subsampleY = values[1];
|
||
break;
|
||
case OPT_TO:
|
||
if ((values[0] < 0) || (values[1] < 0) || ((numValues > 2)
|
||
&& ((values[2] < 0) || (values[3] < 0)))) {
|
||
Tcl_AppendResult(interp, "value(s) for the -to",
|
||
" option must be non-negative", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (numValues <= 2) {
|
||
optPtr->toX = values[0];
|
||
optPtr->toY = values[1];
|
||
optPtr->toX2 = -1;
|
||
optPtr->toY2 = -1;
|
||
} else {
|
||
optPtr->toX = MIN(values[0], values[2]);
|
||
optPtr->toY = MIN(values[1], values[3]);
|
||
optPtr->toX2 = MAX(values[0], values[2]);
|
||
optPtr->toY2 = MAX(values[1], values[3]);
|
||
}
|
||
break;
|
||
case OPT_ZOOM:
|
||
if ((values[0] <= 0) || (values[1] <= 0)) {
|
||
Tcl_AppendResult(interp, "value(s) for the -zoom",
|
||
" option must be positive", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
optPtr->zoomX = values[0];
|
||
optPtr->zoomY = values[1];
|
||
break;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Remember that we saw this option.
|
||
*/
|
||
|
||
optPtr->options |= bit;
|
||
}
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoConfigureMaster --
|
||
*
|
||
* This function is called when a photo image is created or reconfigured.
|
||
* It processes configuration options and resets any instances of the
|
||
* image.
|
||
*
|
||
* Results:
|
||
* A standard Tcl return value. If TCL_ERROR is returned then an error
|
||
* message is left in the masterPtr->interp's result.
|
||
*
|
||
* Side effects:
|
||
* Existing instances of the image will be redisplayed to match the new
|
||
* configuration options.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoConfigureMaster(
|
||
Tcl_Interp *interp, /* Interpreter to use for reporting errors. */
|
||
PhotoMaster *masterPtr, /* Pointer to data structure describing
|
||
* overall photo image to (re)configure. */
|
||
int objc, /* Number of entries in objv. */
|
||
Tcl_Obj *const objv[], /* Pairs of configuration options for image. */
|
||
int flags) /* Flags to pass to Tk_ConfigureWidget, such
|
||
* as TK_CONFIG_ARGV_ONLY. */
|
||
{
|
||
PhotoInstance *instancePtr;
|
||
const char *oldFileString, *oldPaletteString;
|
||
Tcl_Obj *oldData, *data = NULL, *oldFormat, *format = NULL;
|
||
Tcl_Obj *tempdata, *tempformat;
|
||
int length, i, j, result, imageWidth, imageHeight, oldformat;
|
||
double oldGamma;
|
||
Tcl_Channel chan;
|
||
Tk_PhotoImageFormat *imageFormat;
|
||
const char **args;
|
||
|
||
args = (const char **) ckalloc((objc + 1) * sizeof(char *));
|
||
for (i = 0, j = 0; i < objc; i++,j++) {
|
||
args[j] = Tcl_GetStringFromObj(objv[i], &length);
|
||
if ((length > 1) && (args[j][0] == '-')) {
|
||
if ((args[j][1] == 'd') &&
|
||
!strncmp(args[j], "-data", (size_t) length)) {
|
||
if (++i < objc) {
|
||
data = objv[i];
|
||
j--;
|
||
} else {
|
||
Tcl_AppendResult(interp,
|
||
"value for \"-data\" missing", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else if ((args[j][1] == 'f') &&
|
||
!strncmp(args[j], "-format", (size_t) length)) {
|
||
if (++i < objc) {
|
||
format = objv[i];
|
||
j--;
|
||
} else {
|
||
Tcl_AppendResult(interp,
|
||
"value for \"-format\" missing", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Save the current values for fileString and dataString, so we can tell
|
||
* if the user specifies them anew. IMPORTANT: if the format changes we
|
||
* have to interpret "-file" and "-data" again as well! It might be that
|
||
* the format string influences how "-data" or "-file" is interpreted.
|
||
*/
|
||
|
||
oldFileString = masterPtr->fileString;
|
||
if (oldFileString == NULL) {
|
||
oldData = masterPtr->dataString;
|
||
if (oldData != NULL) {
|
||
Tcl_IncrRefCount(oldData);
|
||
}
|
||
} else {
|
||
oldData = NULL;
|
||
}
|
||
oldFormat = masterPtr->format;
|
||
if (oldFormat != NULL) {
|
||
Tcl_IncrRefCount(oldFormat);
|
||
}
|
||
oldPaletteString = masterPtr->palette;
|
||
oldGamma = masterPtr->gamma;
|
||
|
||
/*
|
||
* Process the configuration options specified.
|
||
*/
|
||
|
||
if (Tk_ConfigureWidget(interp, Tk_MainWindow(interp), configSpecs,
|
||
j, args, (char *) masterPtr, flags) != TCL_OK) {
|
||
ckfree((char *) args);
|
||
goto errorExit;
|
||
}
|
||
ckfree((char *) args);
|
||
|
||
/*
|
||
* Regard the empty string for -file, -data or -format as the null value.
|
||
*/
|
||
|
||
if ((masterPtr->fileString != NULL) && (masterPtr->fileString[0] == 0)) {
|
||
ckfree(masterPtr->fileString);
|
||
masterPtr->fileString = NULL;
|
||
}
|
||
if (data) {
|
||
/*
|
||
* Force into ByteArray format, which most (all) image handlers will
|
||
* use anyway. Empty length means ignore the -data option.
|
||
*/
|
||
|
||
(void) Tcl_GetByteArrayFromObj(data, &length);
|
||
if (length) {
|
||
Tcl_IncrRefCount(data);
|
||
} else {
|
||
data = NULL;
|
||
}
|
||
if (masterPtr->dataString) {
|
||
Tcl_DecrRefCount(masterPtr->dataString);
|
||
}
|
||
masterPtr->dataString = data;
|
||
}
|
||
if (format) {
|
||
/*
|
||
* Stringify to ignore -format "". It may come in as a list or other
|
||
* object.
|
||
*/
|
||
|
||
(void) Tcl_GetStringFromObj(format, &length);
|
||
if (length) {
|
||
Tcl_IncrRefCount(format);
|
||
} else {
|
||
format = NULL;
|
||
}
|
||
if (masterPtr->format) {
|
||
Tcl_DecrRefCount(masterPtr->format);
|
||
}
|
||
masterPtr->format = format;
|
||
}
|
||
/*
|
||
* Set the image to the user-requested size, if any, and make sure storage
|
||
* is correctly allocated for this image.
|
||
*/
|
||
|
||
if (ImgPhotoSetSize(masterPtr, masterPtr->width,
|
||
masterPtr->height) != TCL_OK) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
goto errorExit;
|
||
}
|
||
|
||
/*
|
||
* Read in the image from the file or string if the user has specified the
|
||
* -file or -data option.
|
||
*/
|
||
|
||
if ((masterPtr->fileString != NULL)
|
||
&& ((masterPtr->fileString != oldFileString)
|
||
|| (masterPtr->format != oldFormat))) {
|
||
|
||
/*
|
||
* Prevent file system access in a safe interpreter.
|
||
*/
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp,
|
||
"can't get image from a file in a safe interpreter", NULL);
|
||
goto errorExit;
|
||
}
|
||
|
||
chan = Tcl_OpenFileChannel(interp, masterPtr->fileString, "r", 0);
|
||
if (chan == NULL) {
|
||
goto errorExit;
|
||
}
|
||
|
||
/*
|
||
* -translation binary also sets -encoding binary
|
||
*/
|
||
|
||
if ((Tcl_SetChannelOption(interp, chan,
|
||
"-translation", "binary") != TCL_OK) ||
|
||
(MatchFileFormat(interp, chan, masterPtr->fileString,
|
||
masterPtr->format, &imageFormat, &imageWidth,
|
||
&imageHeight, &oldformat) != TCL_OK)) {
|
||
Tcl_Close(NULL, chan);
|
||
goto errorExit;
|
||
}
|
||
result = ImgPhotoSetSize(masterPtr, imageWidth, imageHeight);
|
||
if (result != TCL_OK) {
|
||
Tcl_Close(NULL, chan);
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
goto errorExit;
|
||
}
|
||
tempformat = masterPtr->format;
|
||
if (oldformat && tempformat) {
|
||
tempformat = (Tcl_Obj *) Tcl_GetString(tempformat);
|
||
}
|
||
result = (*imageFormat->fileReadProc)(interp, chan,
|
||
masterPtr->fileString, tempformat, (Tk_PhotoHandle) masterPtr,
|
||
0, 0, imageWidth, imageHeight, 0, 0);
|
||
Tcl_Close(NULL, chan);
|
||
if (result != TCL_OK) {
|
||
goto errorExit;
|
||
}
|
||
|
||
Tcl_ResetResult(interp);
|
||
masterPtr->flags |= IMAGE_CHANGED;
|
||
}
|
||
|
||
if ((masterPtr->fileString == NULL) && (masterPtr->dataString != NULL)
|
||
&& ((masterPtr->dataString != oldData)
|
||
|| (masterPtr->format != oldFormat))) {
|
||
|
||
if (MatchStringFormat(interp, masterPtr->dataString,
|
||
masterPtr->format, &imageFormat, &imageWidth,
|
||
&imageHeight, &oldformat) != TCL_OK) {
|
||
goto errorExit;
|
||
}
|
||
if (ImgPhotoSetSize(masterPtr, imageWidth, imageHeight) != TCL_OK) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
goto errorExit;
|
||
}
|
||
tempformat = masterPtr->format;
|
||
tempdata = masterPtr->dataString;
|
||
if (oldformat) {
|
||
if (tempformat) {
|
||
tempformat = (Tcl_Obj *) Tcl_GetString(tempformat);
|
||
}
|
||
tempdata = (Tcl_Obj *) Tcl_GetString(tempdata);
|
||
}
|
||
if ((*imageFormat->stringReadProc)(interp, tempdata,
|
||
tempformat, (Tk_PhotoHandle) masterPtr,
|
||
0, 0, imageWidth, imageHeight, 0, 0) != TCL_OK) {
|
||
goto errorExit;
|
||
}
|
||
|
||
Tcl_ResetResult(interp);
|
||
masterPtr->flags |= IMAGE_CHANGED;
|
||
}
|
||
|
||
/*
|
||
* Enforce a reasonable value for gamma.
|
||
*/
|
||
|
||
if (masterPtr->gamma <= 0) {
|
||
masterPtr->gamma = 1.0;
|
||
}
|
||
|
||
if ((masterPtr->gamma != oldGamma)
|
||
|| (masterPtr->palette != oldPaletteString)) {
|
||
masterPtr->flags |= IMAGE_CHANGED;
|
||
}
|
||
|
||
/*
|
||
* Cycle through all of the instances of this image, regenerating the
|
||
* information for each instance. Then force the image to be redisplayed
|
||
* everywhere that it is used.
|
||
*/
|
||
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
ImgPhotoConfigureInstance(instancePtr);
|
||
}
|
||
|
||
/*
|
||
* Inform the generic image code that the image has (potentially) changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
|
||
masterPtr->height, masterPtr->width, masterPtr->height);
|
||
masterPtr->flags &= ~IMAGE_CHANGED;
|
||
|
||
if (oldData != NULL) {
|
||
Tcl_DecrRefCount(oldData);
|
||
}
|
||
if (oldFormat != NULL) {
|
||
Tcl_DecrRefCount(oldFormat);
|
||
}
|
||
|
||
ToggleComplexAlphaIfNeeded(masterPtr);
|
||
|
||
return TCL_OK;
|
||
|
||
errorExit:
|
||
if (oldData != NULL) {
|
||
Tcl_DecrRefCount(oldData);
|
||
}
|
||
if (oldFormat != NULL) {
|
||
Tcl_DecrRefCount(oldFormat);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoConfigureInstance --
|
||
*
|
||
* This function is called to create displaying information for a photo
|
||
* image instance based on the configuration information in the master.
|
||
* It is invoked both when new instances are created and when the master
|
||
* is reconfigured.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Generates errors via Tcl_BackgroundError if there are problems in
|
||
* setting up the instance.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoConfigureInstance(
|
||
PhotoInstance *instancePtr) /* Instance to reconfigure. */
|
||
{
|
||
PhotoMaster *masterPtr = instancePtr->masterPtr;
|
||
XImage *imagePtr;
|
||
int bitsPerPixel;
|
||
ColorTable *colorTablePtr;
|
||
XRectangle validBox;
|
||
|
||
/*
|
||
* If the -palette configuration option has been set for the master, use
|
||
* the value specified for our palette, but only if it is a valid palette
|
||
* for our windows. Use the gamma value specified the master.
|
||
*/
|
||
|
||
if ((masterPtr->palette && masterPtr->palette[0])
|
||
&& IsValidPalette(instancePtr, masterPtr->palette)) {
|
||
instancePtr->palette = masterPtr->palette;
|
||
} else {
|
||
instancePtr->palette = instancePtr->defaultPalette;
|
||
}
|
||
instancePtr->gamma = masterPtr->gamma;
|
||
|
||
/*
|
||
* If we don't currently have a color table, or if the one we have no
|
||
* longer applies (e.g. because our palette or gamma has changed), get a
|
||
* new one.
|
||
*/
|
||
|
||
colorTablePtr = instancePtr->colorTablePtr;
|
||
if ((colorTablePtr == NULL)
|
||
|| (instancePtr->colormap != colorTablePtr->id.colormap)
|
||
|| (instancePtr->palette != colorTablePtr->id.palette)
|
||
|| (instancePtr->gamma != colorTablePtr->id.gamma)) {
|
||
/*
|
||
* Free up our old color table, and get a new one.
|
||
*/
|
||
|
||
if (colorTablePtr != NULL) {
|
||
colorTablePtr->liveRefCount -= 1;
|
||
FreeColorTable(colorTablePtr, 0);
|
||
}
|
||
GetColorTable(instancePtr);
|
||
|
||
/*
|
||
* Create a new XImage structure for sending data to the X server, if
|
||
* necessary.
|
||
*/
|
||
|
||
if (instancePtr->colorTablePtr->flags & BLACK_AND_WHITE) {
|
||
bitsPerPixel = 1;
|
||
} else {
|
||
bitsPerPixel = instancePtr->visualInfo.depth;
|
||
}
|
||
|
||
if ((instancePtr->imagePtr == NULL)
|
||
|| (instancePtr->imagePtr->bits_per_pixel != bitsPerPixel)) {
|
||
if (instancePtr->imagePtr != NULL) {
|
||
XDestroyImage(instancePtr->imagePtr);
|
||
}
|
||
imagePtr = XCreateImage(instancePtr->display,
|
||
instancePtr->visualInfo.visual, (unsigned) bitsPerPixel,
|
||
(bitsPerPixel > 1? ZPixmap: XYBitmap), 0, NULL,
|
||
1, 1, 32, 0);
|
||
instancePtr->imagePtr = imagePtr;
|
||
|
||
/*
|
||
* We create images using the local host's endianness, rather than
|
||
* the endianness of the server; otherwise we would have to
|
||
* byte-swap any 16 or 32 bit values that we store in the image
|
||
* if the server's endianness is different from ours.
|
||
*/
|
||
|
||
if (imagePtr != NULL) {
|
||
#ifdef WORDS_BIGENDIAN
|
||
imagePtr->byte_order = MSBFirst;
|
||
#else
|
||
imagePtr->byte_order = LSBFirst;
|
||
#endif
|
||
_XInitImageFuncPtrs(imagePtr);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* If the user has specified a width and/or height for the master which is
|
||
* different from our current width/height, set the size to the values
|
||
* specified by the user. If we have no pixmap, we do this also, since it
|
||
* has the side effect of allocating a pixmap for us.
|
||
*/
|
||
|
||
if ((instancePtr->pixels == None) || (instancePtr->error == NULL)
|
||
|| (instancePtr->width != masterPtr->width)
|
||
|| (instancePtr->height != masterPtr->height)) {
|
||
ImgPhotoInstanceSetSize(instancePtr);
|
||
}
|
||
|
||
/*
|
||
* Redither this instance if necessary.
|
||
*/
|
||
|
||
if ((masterPtr->flags & IMAGE_CHANGED)
|
||
|| (instancePtr->colorTablePtr != colorTablePtr)) {
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
if ((validBox.width > 0) && (validBox.height > 0)) {
|
||
DitherInstance(instancePtr, validBox.x, validBox.y,
|
||
validBox.width, validBox.height);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoGet --
|
||
*
|
||
* This function is called for each use of a photo image in a widget.
|
||
*
|
||
* Results:
|
||
* The return value is a token for the instance, which is passed back to
|
||
* us in calls to ImgPhotoDisplay and ImgPhotoFree.
|
||
*
|
||
* Side effects:
|
||
* A data structure is set up for the instance (or, an existing instance
|
||
* is re-used for the new one).
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static ClientData
|
||
ImgPhotoGet(
|
||
Tk_Window tkwin, /* Window in which the instance will be
|
||
* used. */
|
||
ClientData masterData) /* Pointer to our master structure for the
|
||
* image. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) masterData;
|
||
PhotoInstance *instancePtr;
|
||
Colormap colormap;
|
||
int mono, nRed, nGreen, nBlue, numVisuals;
|
||
XVisualInfo visualInfo, *visInfoPtr;
|
||
char buf[TCL_INTEGER_SPACE * 3];
|
||
XColor *white, *black;
|
||
XGCValues gcValues;
|
||
|
||
/*
|
||
* Table of "best" choices for palette for PseudoColor displays with
|
||
* between 3 and 15 bits/pixel.
|
||
*/
|
||
|
||
static const int paletteChoice[13][3] = {
|
||
/* #red, #green, #blue */
|
||
{2, 2, 2, /* 3 bits, 8 colors */},
|
||
{2, 3, 2, /* 4 bits, 12 colors */},
|
||
{3, 4, 2, /* 5 bits, 24 colors */},
|
||
{4, 5, 3, /* 6 bits, 60 colors */},
|
||
{5, 6, 4, /* 7 bits, 120 colors */},
|
||
{7, 7, 4, /* 8 bits, 198 colors */},
|
||
{8, 10, 6, /* 9 bits, 480 colors */},
|
||
{10, 12, 8, /* 10 bits, 960 colors */},
|
||
{14, 15, 9, /* 11 bits, 1890 colors */},
|
||
{16, 20, 12, /* 12 bits, 3840 colors */},
|
||
{20, 24, 16, /* 13 bits, 7680 colors */},
|
||
{26, 30, 20, /* 14 bits, 15600 colors */},
|
||
{32, 32, 30, /* 15 bits, 30720 colors */}
|
||
};
|
||
|
||
/*
|
||
* See if there is already an instance for windows using the same
|
||
* colormap. If so then just re-use it.
|
||
*/
|
||
|
||
colormap = Tk_Colormap(tkwin);
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
if ((colormap == instancePtr->colormap)
|
||
&& (Tk_Display(tkwin) == instancePtr->display)) {
|
||
/*
|
||
* Re-use this instance.
|
||
*/
|
||
|
||
if (instancePtr->refCount == 0) {
|
||
/*
|
||
* We are resurrecting this instance.
|
||
*/
|
||
|
||
Tcl_CancelIdleCall(DisposeInstance, (ClientData) instancePtr);
|
||
if (instancePtr->colorTablePtr != NULL) {
|
||
FreeColorTable(instancePtr->colorTablePtr, 0);
|
||
}
|
||
GetColorTable(instancePtr);
|
||
}
|
||
instancePtr->refCount++;
|
||
return (ClientData) instancePtr;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* The image isn't already in use in a window with the same colormap. Make
|
||
* a new instance of the image.
|
||
*/
|
||
|
||
instancePtr = (PhotoInstance *) ckalloc(sizeof(PhotoInstance));
|
||
instancePtr->masterPtr = masterPtr;
|
||
instancePtr->display = Tk_Display(tkwin);
|
||
instancePtr->colormap = Tk_Colormap(tkwin);
|
||
Tk_PreserveColormap(instancePtr->display, instancePtr->colormap);
|
||
instancePtr->refCount = 1;
|
||
instancePtr->colorTablePtr = NULL;
|
||
instancePtr->pixels = None;
|
||
instancePtr->error = NULL;
|
||
instancePtr->width = 0;
|
||
instancePtr->height = 0;
|
||
instancePtr->imagePtr = 0;
|
||
instancePtr->nextPtr = masterPtr->instancePtr;
|
||
masterPtr->instancePtr = instancePtr;
|
||
|
||
/*
|
||
* Obtain information about the visual and decide on the default palette.
|
||
*/
|
||
|
||
visualInfo.screen = Tk_ScreenNumber(tkwin);
|
||
visualInfo.visualid = XVisualIDFromVisual(Tk_Visual(tkwin));
|
||
visInfoPtr = XGetVisualInfo(Tk_Display(tkwin),
|
||
VisualScreenMask | VisualIDMask, &visualInfo, &numVisuals);
|
||
if (visInfoPtr == NULL) {
|
||
Tcl_Panic("ImgPhotoGet couldn't find visual for window");
|
||
}
|
||
|
||
nRed = 2;
|
||
nGreen = nBlue = 0;
|
||
mono = 1;
|
||
instancePtr->visualInfo = *visInfoPtr;
|
||
switch (visInfoPtr->class) {
|
||
case DirectColor:
|
||
case TrueColor:
|
||
nRed = 1 << CountBits(visInfoPtr->red_mask);
|
||
nGreen = 1 << CountBits(visInfoPtr->green_mask);
|
||
nBlue = 1 << CountBits(visInfoPtr->blue_mask);
|
||
mono = 0;
|
||
break;
|
||
case PseudoColor:
|
||
case StaticColor:
|
||
if (visInfoPtr->depth > 15) {
|
||
nRed = 32;
|
||
nGreen = 32;
|
||
nBlue = 32;
|
||
mono = 0;
|
||
} else if (visInfoPtr->depth >= 3) {
|
||
const int *ip = paletteChoice[visInfoPtr->depth - 3];
|
||
|
||
nRed = ip[0];
|
||
nGreen = ip[1];
|
||
nBlue = ip[2];
|
||
mono = 0;
|
||
}
|
||
break;
|
||
case GrayScale:
|
||
case StaticGray:
|
||
nRed = 1 << visInfoPtr->depth;
|
||
break;
|
||
}
|
||
XFree((char *) visInfoPtr);
|
||
|
||
if (mono) {
|
||
sprintf(buf, "%d", nRed);
|
||
} else {
|
||
sprintf(buf, "%d/%d/%d", nRed, nGreen, nBlue);
|
||
}
|
||
instancePtr->defaultPalette = Tk_GetUid(buf);
|
||
|
||
/*
|
||
* Make a GC with background = black and foreground = white.
|
||
*/
|
||
|
||
white = Tk_GetColor(masterPtr->interp, tkwin, "white");
|
||
black = Tk_GetColor(masterPtr->interp, tkwin, "black");
|
||
gcValues.foreground = (white != NULL)? white->pixel:
|
||
WhitePixelOfScreen(Tk_Screen(tkwin));
|
||
gcValues.background = (black != NULL)? black->pixel:
|
||
BlackPixelOfScreen(Tk_Screen(tkwin));
|
||
Tk_FreeColor(white);
|
||
Tk_FreeColor(black);
|
||
gcValues.graphics_exposures = False;
|
||
instancePtr->gc = Tk_GetGC(tkwin,
|
||
GCForeground|GCBackground|GCGraphicsExposures, &gcValues);
|
||
|
||
/*
|
||
* Set configuration options and finish the initialization of the
|
||
* instance. This will also dither the image if necessary.
|
||
*/
|
||
|
||
ImgPhotoConfigureInstance(instancePtr);
|
||
|
||
/*
|
||
* If this is the first instance, must set the size of the image.
|
||
*/
|
||
|
||
if (instancePtr->nextPtr == NULL) {
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
|
||
masterPtr->width, masterPtr->height);
|
||
}
|
||
|
||
return (ClientData) instancePtr;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ToggleComplexAlphaIfNeeded --
|
||
*
|
||
* This function is called when an image is modified to check if any
|
||
* partially transparent pixels exist, which requires blending instead of
|
||
* straight copy.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* (Re)sets COMPLEX_ALPHA flag of master.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ToggleComplexAlphaIfNeeded(
|
||
PhotoMaster *mPtr)
|
||
{
|
||
size_t len = MAX(mPtr->userWidth, mPtr->width) *
|
||
MAX(mPtr->userHeight, mPtr->height) * 4;
|
||
unsigned char *c = mPtr->pix32;
|
||
unsigned char *end = c + len;
|
||
|
||
/*
|
||
* Set the COMPLEX_ALPHA flag if we have an image with partially
|
||
* transparent bits.
|
||
*/
|
||
|
||
mPtr->flags &= ~COMPLEX_ALPHA;
|
||
c += 3; /* Start at first alpha byte. */
|
||
for (; c < end; c += 4) {
|
||
if (*c && *c != 255) {
|
||
mPtr->flags |= COMPLEX_ALPHA;
|
||
break;
|
||
}
|
||
}
|
||
return (mPtr->flags & COMPLEX_ALPHA);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoBlendComplexAlpha --
|
||
*
|
||
* This function is called when an image with partially transparent
|
||
* pixels must be drawn over another image. It blends the photo data onto
|
||
* a local copy of the surface that we are drawing on, *including* the
|
||
* pixels drawn by everything that should be drawn underneath the image.
|
||
*
|
||
* Much of this code has hard-coded values in for speed because this
|
||
* routine is performance critical for complex image drawing.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Background image passed in gets drawn over with image data.
|
||
*
|
||
* Notes:
|
||
* This should work on all platforms that set mask and shift data
|
||
* properly from the visualInfo. RGB is really only a 24+ bpp version
|
||
* whereas RGB15 is the correct version and works for 15bpp+, but it
|
||
* slower, so it's only used for 15bpp+.
|
||
*
|
||
* Note that Win32 pre-defines those operations that we really need.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
#ifndef __WIN32__
|
||
#define GetRValue(rgb) (UCHAR(((rgb) & red_mask) >> red_shift))
|
||
#define GetGValue(rgb) (UCHAR(((rgb) & green_mask) >> green_shift))
|
||
#define GetBValue(rgb) (UCHAR(((rgb) & blue_mask) >> blue_shift))
|
||
#define RGB(r, g, b) ((unsigned)( \
|
||
(UCHAR(r) << red_shift) | \
|
||
(UCHAR(g) << green_shift) | \
|
||
(UCHAR(b) << blue_shift) ))
|
||
#define RGB15(r, g, b) ((unsigned)( \
|
||
(((r) * red_mask / 255) & red_mask) | \
|
||
(((g) * green_mask / 255) & green_mask) | \
|
||
(((b) * blue_mask / 255) & blue_mask) ))
|
||
#endif /* !__WIN32__ */
|
||
|
||
static void
|
||
ImgPhotoBlendComplexAlpha(
|
||
XImage *bgImg, /* Background image to draw on. */
|
||
PhotoInstance *iPtr, /* Image instance to draw. */
|
||
int xOffset, int yOffset, /* X & Y offset into image instance to
|
||
* draw. */
|
||
int width, int height) /* Width & height of image to draw. */
|
||
{
|
||
int x, y, line;
|
||
unsigned long pixel;
|
||
unsigned char r, g, b, alpha, unalpha, *masterPtr;
|
||
unsigned char *alphaAr = iPtr->masterPtr->pix32;
|
||
|
||
/*
|
||
* This blending is an integer version of the Source-Over compositing rule
|
||
* (see Porter&Duff, "Compositing Digital Images", proceedings of SIGGRAPH
|
||
* 1984) that has been hard-coded (for speed) to work with targetting a
|
||
* solid surface.
|
||
*
|
||
* The 'unalpha' field must be 255-alpha; it is separated out to encourage
|
||
* more efficient compilation.
|
||
*/
|
||
|
||
#define ALPHA_BLEND(bgPix, imgPix, alpha, unalpha) \
|
||
((bgPix * unalpha + imgPix * alpha) / 255)
|
||
|
||
/*
|
||
* We have to get the mask and shift info from the visual on non-Win32 so
|
||
* that the macros Get*Value(), RGB() and RGB15() work correctly. This
|
||
* might be cached for better performance.
|
||
*/
|
||
|
||
#ifndef __WIN32__
|
||
unsigned long red_mask, green_mask, blue_mask;
|
||
unsigned long red_shift, green_shift, blue_shift;
|
||
Visual *visual = iPtr->visualInfo.visual;
|
||
|
||
red_mask = visual->red_mask;
|
||
green_mask = visual->green_mask;
|
||
blue_mask = visual->blue_mask;
|
||
red_shift = 0;
|
||
green_shift = 0;
|
||
blue_shift = 0;
|
||
while ((0x0001 & (red_mask >> red_shift)) == 0) {
|
||
red_shift++;
|
||
}
|
||
while ((0x0001 & (green_mask >> green_shift)) == 0) {
|
||
green_shift++;
|
||
}
|
||
while ((0x0001 & (blue_mask >> blue_shift)) == 0) {
|
||
blue_shift++;
|
||
}
|
||
#endif /* !__WIN32__ */
|
||
|
||
/*
|
||
* Only UNIX requires the special case for <24bpp. It varies with 3 extra
|
||
* shifts and uses RGB15. The 24+bpp version could also then be further
|
||
* optimized.
|
||
*/
|
||
|
||
#if !(defined(__WIN32__) || defined(MAC_OSX_TK))
|
||
if (bgImg->depth < 24) {
|
||
unsigned char red_mlen, green_mlen, blue_mlen;
|
||
|
||
red_mlen = 8 - CountBits(red_mask >> red_shift);
|
||
green_mlen = 8 - CountBits(green_mask >> green_shift);
|
||
blue_mlen = 8 - CountBits(blue_mask >> blue_shift);
|
||
for (y = 0; y < height; y++) {
|
||
line = (y + yOffset) * iPtr->masterPtr->width;
|
||
for (x = 0; x < width; x++) {
|
||
masterPtr = alphaAr + ((line + x + xOffset) * 4);
|
||
alpha = masterPtr[3];
|
||
|
||
/*
|
||
* Ignore pixels that are fully transparent
|
||
*/
|
||
|
||
if (alpha) {
|
||
/*
|
||
* We could perhaps be more efficient than XGetPixel for
|
||
* 24 and 32 bit displays, but this seems "fast enough".
|
||
*/
|
||
|
||
r = masterPtr[0];
|
||
g = masterPtr[1];
|
||
b = masterPtr[2];
|
||
if (alpha != 255) {
|
||
/*
|
||
* Only blend pixels that have some transparency
|
||
*/
|
||
|
||
unsigned char ra, ga, ba;
|
||
|
||
pixel = XGetPixel(bgImg, x, y);
|
||
ra = GetRValue(pixel) << red_mlen;
|
||
ga = GetGValue(pixel) << green_mlen;
|
||
ba = GetBValue(pixel) << blue_mlen;
|
||
unalpha = 255 - alpha; /* Calculate once. */
|
||
r = ALPHA_BLEND(ra, r, alpha, unalpha);
|
||
g = ALPHA_BLEND(ga, g, alpha, unalpha);
|
||
b = ALPHA_BLEND(ba, b, alpha, unalpha);
|
||
}
|
||
XPutPixel(bgImg, x, y, RGB15(r, g, b));
|
||
}
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
#endif /* !__WIN32__ && !MAC_OSX_TK */
|
||
|
||
for (y = 0; y < height; y++) {
|
||
line = (y + yOffset) * iPtr->masterPtr->width;
|
||
for (x = 0; x < width; x++) {
|
||
masterPtr = alphaAr + ((line + x + xOffset) * 4);
|
||
alpha = masterPtr[3];
|
||
|
||
/*
|
||
* Ignore pixels that are fully transparent
|
||
*/
|
||
|
||
if (alpha) {
|
||
/*
|
||
* We could perhaps be more efficient than XGetPixel for 24
|
||
* and 32 bit displays, but this seems "fast enough".
|
||
*/
|
||
|
||
r = masterPtr[0];
|
||
g = masterPtr[1];
|
||
b = masterPtr[2];
|
||
if (alpha != 255) {
|
||
/*
|
||
* Only blend pixels that have some transparency
|
||
*/
|
||
|
||
unsigned char ra, ga, ba;
|
||
|
||
pixel = XGetPixel(bgImg, x, y);
|
||
ra = GetRValue(pixel);
|
||
ga = GetGValue(pixel);
|
||
ba = GetBValue(pixel);
|
||
unalpha = 255 - alpha; /* Calculate once. */
|
||
r = ALPHA_BLEND(ra, r, alpha, unalpha);
|
||
g = ALPHA_BLEND(ga, g, alpha, unalpha);
|
||
b = ALPHA_BLEND(ba, b, alpha, unalpha);
|
||
}
|
||
XPutPixel(bgImg, x, y, RGB(r, g, b));
|
||
}
|
||
}
|
||
}
|
||
#undef ALPHA_BLEND
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoDisplay --
|
||
*
|
||
* This function is invoked to draw a photo image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* A portion of the image gets rendered in a pixmap or window.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoDisplay(
|
||
ClientData clientData, /* Pointer to PhotoInstance structure for
|
||
* instance to be displayed. */
|
||
Display *display, /* Display on which to draw image. */
|
||
Drawable drawable, /* Pixmap or window in which to draw image. */
|
||
int imageX, int imageY, /* Upper-left corner of region within image to
|
||
* draw. */
|
||
int width, int height, /* Dimensions of region within image to
|
||
* draw. */
|
||
int drawableX,int drawableY)/* Coordinates within drawable that correspond
|
||
* to imageX and imageY. */
|
||
{
|
||
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
||
XVisualInfo visInfo = instancePtr->visualInfo;
|
||
|
||
/*
|
||
* If there's no pixmap, it means that an error occurred while creating
|
||
* the image instance so it can't be displayed.
|
||
*/
|
||
|
||
if (instancePtr->pixels == None) {
|
||
return;
|
||
}
|
||
|
||
if ((instancePtr->masterPtr->flags & COMPLEX_ALPHA)
|
||
&& visInfo.depth >= 15
|
||
&& (visInfo.class == DirectColor || visInfo.class == TrueColor)) {
|
||
Tk_ErrorHandler handler;
|
||
XImage *bgImg = NULL;
|
||
|
||
/*
|
||
* Create an error handler to suppress the case where the input was
|
||
* not properly constrained, which can cause an X error. [Bug 979239]
|
||
*/
|
||
|
||
handler = Tk_CreateErrorHandler(display, -1, -1, -1, NULL,
|
||
(ClientData) NULL);
|
||
|
||
/*
|
||
* Pull the current background from the display to blend with
|
||
*/
|
||
|
||
bgImg = XGetImage(display, drawable, drawableX, drawableY,
|
||
(unsigned int)width, (unsigned int)height, AllPlanes, ZPixmap);
|
||
if (bgImg == NULL) {
|
||
Tk_DeleteErrorHandler(handler);
|
||
/* We failed to get the image so draw without blending alpha. It's the best we can do */
|
||
goto fallBack;
|
||
}
|
||
|
||
ImgPhotoBlendComplexAlpha(bgImg, instancePtr, imageX, imageY, width,
|
||
height);
|
||
|
||
/*
|
||
* Color info is unimportant as we only do this operation for depth >=
|
||
* 15.
|
||
*/
|
||
|
||
TkPutImage(NULL, 0, display, drawable, instancePtr->gc,
|
||
bgImg, 0, 0, drawableX, drawableY,
|
||
(unsigned int) width, (unsigned int) height);
|
||
XDestroyImage(bgImg);
|
||
Tk_DeleteErrorHandler(handler);
|
||
} else {
|
||
/*
|
||
* masterPtr->region describes which parts of the image contain valid
|
||
* data. We set this region as the clip mask for the gc, setting its
|
||
* origin appropriately, and use it when drawing the image.
|
||
*/
|
||
|
||
fallBack:
|
||
TkSetRegion(display, instancePtr->gc,
|
||
instancePtr->masterPtr->validRegion);
|
||
XSetClipOrigin(display, instancePtr->gc, drawableX - imageX,
|
||
drawableY - imageY);
|
||
XCopyArea(display, instancePtr->pixels, drawable, instancePtr->gc,
|
||
imageX, imageY, (unsigned) width, (unsigned) height,
|
||
drawableX, drawableY);
|
||
XSetClipMask(display, instancePtr->gc, None);
|
||
XSetClipOrigin(display, instancePtr->gc, 0, 0);
|
||
}
|
||
XFlush(display);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoFree --
|
||
*
|
||
* This function is called when a widget ceases to use a particular
|
||
* instance of an image. We don't actually get rid of the instance until
|
||
* later because we may be about to get this instance again.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Internal data structures get cleaned up, later.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoFree(
|
||
ClientData clientData, /* Pointer to PhotoInstance structure for
|
||
* instance to be displayed. */
|
||
Display *display) /* Display containing window that used
|
||
* image. */
|
||
{
|
||
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
||
ColorTable *colorPtr;
|
||
|
||
instancePtr->refCount -= 1;
|
||
if (instancePtr->refCount > 0) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* There are no more uses of the image within this widget. Decrement the
|
||
* count of live uses of its color table, so that its colors can be
|
||
* reclaimed if necessary, and set up an idle call to free the instance
|
||
* structure.
|
||
*/
|
||
|
||
colorPtr = instancePtr->colorTablePtr;
|
||
if (colorPtr != NULL) {
|
||
colorPtr->liveRefCount -= 1;
|
||
}
|
||
|
||
Tcl_DoWhenIdle(DisposeInstance, (ClientData) instancePtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoDelete --
|
||
*
|
||
* This function is called by the image code to delete the master
|
||
* structure for an image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Resources associated with the image get freed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoDelete(
|
||
ClientData masterData) /* Pointer to PhotoMaster structure for image.
|
||
* Must not have any more instances. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) masterData;
|
||
PhotoInstance *instancePtr;
|
||
|
||
while ((instancePtr = masterPtr->instancePtr) != NULL) {
|
||
if (instancePtr->refCount > 0) {
|
||
Tcl_Panic("tried to delete photo image when instances still exist");
|
||
}
|
||
Tcl_CancelIdleCall(DisposeInstance, (ClientData) instancePtr);
|
||
DisposeInstance((ClientData) instancePtr);
|
||
}
|
||
masterPtr->tkMaster = NULL;
|
||
if (masterPtr->imageCmd != NULL) {
|
||
Tcl_DeleteCommandFromToken(masterPtr->interp, masterPtr->imageCmd);
|
||
}
|
||
if (masterPtr->pix32 != NULL) {
|
||
ckfree((char *) masterPtr->pix32);
|
||
}
|
||
if (masterPtr->validRegion != NULL) {
|
||
TkDestroyRegion(masterPtr->validRegion);
|
||
}
|
||
if (masterPtr->dataString != NULL) {
|
||
Tcl_DecrRefCount(masterPtr->dataString);
|
||
}
|
||
if (masterPtr->format != NULL) {
|
||
Tcl_DecrRefCount(masterPtr->format);
|
||
}
|
||
Tk_FreeOptions(configSpecs, (char *) masterPtr, NULL, 0);
|
||
ckfree((char *) masterPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoCmdDeletedProc --
|
||
*
|
||
* This function is invoked when the image command for an image is
|
||
* deleted. It deletes the image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The image is deleted.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoCmdDeletedProc(
|
||
ClientData clientData) /* Pointer to PhotoMaster structure for
|
||
* image. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) clientData;
|
||
|
||
masterPtr->imageCmd = NULL;
|
||
if (masterPtr->tkMaster != NULL) {
|
||
Tk_DeleteImage(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster));
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoSetSize --
|
||
*
|
||
* This function reallocates the image storage and instance pixmaps for a
|
||
* photo image, as necessary, to change the image's size to `width' x
|
||
* `height' pixels.
|
||
*
|
||
* Results:
|
||
* TCL_OK if successful, TCL_ERROR if failure occurred (currently just
|
||
* with memory allocation.)
|
||
*
|
||
* Side effects:
|
||
* Storage gets reallocated, for the master and all its instances.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoSetSize(
|
||
PhotoMaster *masterPtr,
|
||
int width, int height)
|
||
{
|
||
unsigned char *newPix32 = NULL;
|
||
int h, offset, pitch;
|
||
unsigned char *srcPtr, *destPtr;
|
||
XRectangle validBox, clipBox;
|
||
TkRegion clipRegion;
|
||
PhotoInstance *instancePtr;
|
||
|
||
if (masterPtr->userWidth > 0) {
|
||
width = masterPtr->userWidth;
|
||
}
|
||
if (masterPtr->userHeight > 0) {
|
||
height = masterPtr->userHeight;
|
||
}
|
||
|
||
pitch = width * 4;
|
||
|
||
/*
|
||
* Test if we're going to (re)allocate the main buffer now, so that any
|
||
* failures will leave the photo unchanged.
|
||
*/
|
||
|
||
if ((width != masterPtr->width) || (height != masterPtr->height)
|
||
|| (masterPtr->pix32 == NULL)) {
|
||
/*
|
||
* Not a u-long, but should be one.
|
||
*/
|
||
|
||
unsigned /*long*/ newPixSize = (unsigned /*long*/) (height * pitch);
|
||
|
||
/*
|
||
* Some mallocs() really hate allocating zero bytes. [Bug 619544]
|
||
*/
|
||
|
||
if (newPixSize == 0) {
|
||
newPix32 = NULL;
|
||
} else {
|
||
newPix32 = (unsigned char *) attemptckalloc(newPixSize);
|
||
if (newPix32 == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* We have to trim the valid region if it is currently larger than the new
|
||
* image size.
|
||
*/
|
||
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
if ((validBox.x + validBox.width > width)
|
||
|| (validBox.y + validBox.height > height)) {
|
||
clipBox.x = 0;
|
||
clipBox.y = 0;
|
||
clipBox.width = width;
|
||
clipBox.height = height;
|
||
clipRegion = TkCreateRegion();
|
||
TkUnionRectWithRegion(&clipBox, clipRegion, clipRegion);
|
||
TkIntersectRegion(masterPtr->validRegion, clipRegion,
|
||
masterPtr->validRegion);
|
||
TkDestroyRegion(clipRegion);
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
}
|
||
|
||
/*
|
||
* Use the reallocated storage (allocation above) for the 32-bit image and
|
||
* copy over valid regions. Note that this test is true precisely when the
|
||
* allocation has already been done.
|
||
*/
|
||
|
||
if (newPix32 != NULL) {
|
||
/*
|
||
* Zero the new array. The dithering code shouldn't read the areas
|
||
* outside validBox, but they might be copied to another photo image
|
||
* or written to a file.
|
||
*/
|
||
|
||
if ((masterPtr->pix32 != NULL)
|
||
&& ((width == masterPtr->width) || (width == validBox.width))) {
|
||
if (validBox.y > 0) {
|
||
memset(newPix32, 0, (size_t) (validBox.y * pitch));
|
||
}
|
||
h = validBox.y + validBox.height;
|
||
if (h < height) {
|
||
memset(newPix32 + h*pitch, 0, (size_t) ((height - h) * pitch));
|
||
}
|
||
} else {
|
||
memset(newPix32, 0, (size_t) (height * pitch));
|
||
}
|
||
|
||
if (masterPtr->pix32 != NULL) {
|
||
/*
|
||
* Copy the common area over to the new array array and free the
|
||
* old array.
|
||
*/
|
||
|
||
if (width == masterPtr->width) {
|
||
|
||
/*
|
||
* The region to be copied is contiguous.
|
||
*/
|
||
|
||
offset = validBox.y * pitch;
|
||
memcpy(newPix32 + offset, masterPtr->pix32 + offset,
|
||
(size_t) (validBox.height * pitch));
|
||
|
||
} else if ((validBox.width > 0) && (validBox.height > 0)) {
|
||
/*
|
||
* Area to be copied is not contiguous - copy line by line.
|
||
*/
|
||
|
||
destPtr = newPix32 + (validBox.y * width + validBox.x) * 4;
|
||
srcPtr = masterPtr->pix32 + (validBox.y * masterPtr->width
|
||
+ validBox.x) * 4;
|
||
for (h = validBox.height; h > 0; h--) {
|
||
memcpy(destPtr, srcPtr, (size_t) (validBox.width * 4));
|
||
destPtr += width * 4;
|
||
srcPtr += masterPtr->width * 4;
|
||
}
|
||
}
|
||
|
||
ckfree((char *) masterPtr->pix32);
|
||
}
|
||
|
||
masterPtr->pix32 = newPix32;
|
||
masterPtr->width = width;
|
||
masterPtr->height = height;
|
||
|
||
/*
|
||
* Dithering will be correct up to the end of the last pre-existing
|
||
* complete scanline.
|
||
*/
|
||
|
||
if ((validBox.x > 0) || (validBox.y > 0)) {
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY = 0;
|
||
} else if (validBox.width == width) {
|
||
if ((int) validBox.height < masterPtr->ditherY) {
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY = validBox.height;
|
||
}
|
||
} else if ((masterPtr->ditherY > 0)
|
||
|| ((int) validBox.width < masterPtr->ditherX)) {
|
||
masterPtr->ditherX = validBox.width;
|
||
masterPtr->ditherY = 0;
|
||
}
|
||
}
|
||
|
||
ToggleComplexAlphaIfNeeded(masterPtr);
|
||
|
||
/*
|
||
* Now adjust the sizes of the pixmaps for all of the instances.
|
||
*/
|
||
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
ImgPhotoInstanceSetSize(instancePtr);
|
||
}
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoInstanceSetSize --
|
||
*
|
||
* This function reallocates the instance pixmap and dithering error
|
||
* array for a photo instance, as necessary, to change the image's size
|
||
* to `width' x `height' pixels.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Storage gets reallocated, here and in the X server.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoInstanceSetSize(
|
||
PhotoInstance *instancePtr) /* Instance whose size is to be changed. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
schar *newError, *errSrcPtr, *errDestPtr;
|
||
int h, offset;
|
||
XRectangle validBox;
|
||
Pixmap newPixmap;
|
||
|
||
masterPtr = instancePtr->masterPtr;
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
|
||
if ((instancePtr->width != masterPtr->width)
|
||
|| (instancePtr->height != masterPtr->height)
|
||
|| (instancePtr->pixels == None)) {
|
||
newPixmap = Tk_GetPixmap(instancePtr->display,
|
||
RootWindow(instancePtr->display,
|
||
instancePtr->visualInfo.screen),
|
||
(masterPtr->width > 0) ? masterPtr->width: 1,
|
||
(masterPtr->height > 0) ? masterPtr->height: 1,
|
||
instancePtr->visualInfo.depth);
|
||
if (!newPixmap) {
|
||
Tcl_Panic("Fail to create pixmap with Tk_GetPixmap in ImgPhotoInstanceSetSize.\n");
|
||
}
|
||
|
||
/*
|
||
* The following is a gross hack needed to properly support colormaps
|
||
* under Windows. Before the pixels can be copied to the pixmap, the
|
||
* relevent colormap must be associated with the drawable. Normally we
|
||
* can infer this association from the window that was used to create
|
||
* the pixmap. However, in this case we're using the root window, so
|
||
* we have to be more explicit.
|
||
*/
|
||
|
||
TkSetPixmapColormap(newPixmap, instancePtr->colormap);
|
||
|
||
if (instancePtr->pixels != None) {
|
||
/*
|
||
* Copy any common pixels from the old pixmap and free it.
|
||
*/
|
||
|
||
XCopyArea(instancePtr->display, instancePtr->pixels, newPixmap,
|
||
instancePtr->gc, validBox.x, validBox.y,
|
||
validBox.width, validBox.height, validBox.x, validBox.y);
|
||
Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
|
||
}
|
||
instancePtr->pixels = newPixmap;
|
||
}
|
||
|
||
if ((instancePtr->width != masterPtr->width)
|
||
|| (instancePtr->height != masterPtr->height)
|
||
|| (instancePtr->error == NULL)) {
|
||
|
||
if (masterPtr->height > 0 && masterPtr->width > 0) {
|
||
newError = (schar *) ckalloc((unsigned)
|
||
masterPtr->height * masterPtr->width * 3 * sizeof(schar));
|
||
|
||
/*
|
||
* Zero the new array so that we don't get bogus error values
|
||
* propagating into areas we dither later.
|
||
*/
|
||
|
||
if ((instancePtr->error != NULL)
|
||
&& ((instancePtr->width == masterPtr->width)
|
||
|| (validBox.width == masterPtr->width))) {
|
||
if (validBox.y > 0) {
|
||
memset(newError, 0, (size_t)
|
||
validBox.y * masterPtr->width * 3 * sizeof(schar));
|
||
}
|
||
h = validBox.y + validBox.height;
|
||
if (h < masterPtr->height) {
|
||
memset(newError + h*masterPtr->width*3, 0,
|
||
(size_t) (masterPtr->height - h)
|
||
* masterPtr->width * 3 * sizeof(schar));
|
||
}
|
||
} else {
|
||
memset(newError, 0, (size_t)
|
||
masterPtr->height * masterPtr->width *3*sizeof(schar));
|
||
}
|
||
} else {
|
||
newError = NULL;
|
||
}
|
||
|
||
if (instancePtr->error != NULL) {
|
||
/*
|
||
* Copy the common area over to the new array and free the old
|
||
* array.
|
||
*/
|
||
|
||
if (masterPtr->width == instancePtr->width) {
|
||
offset = validBox.y * masterPtr->width * 3;
|
||
memcpy(newError + offset, instancePtr->error + offset,
|
||
(size_t) (validBox.height
|
||
* masterPtr->width * 3 * sizeof(schar)));
|
||
|
||
} else if (validBox.width > 0 && validBox.height > 0) {
|
||
errDestPtr = newError +
|
||
(validBox.y * masterPtr->width + validBox.x) * 3;
|
||
errSrcPtr = instancePtr->error +
|
||
(validBox.y * instancePtr->width + validBox.x) * 3;
|
||
|
||
for (h = validBox.height; h > 0; --h) {
|
||
memcpy(errDestPtr, errSrcPtr,
|
||
validBox.width * 3 * sizeof(schar));
|
||
errDestPtr += masterPtr->width * 3;
|
||
errSrcPtr += instancePtr->width * 3;
|
||
}
|
||
}
|
||
ckfree((char *) instancePtr->error);
|
||
}
|
||
|
||
instancePtr->error = newError;
|
||
}
|
||
|
||
instancePtr->width = masterPtr->width;
|
||
instancePtr->height = masterPtr->height;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* IsValidPalette --
|
||
*
|
||
* This function is called to check whether a value given for the
|
||
* -palette option is valid for a particular instance of a photo image.
|
||
*
|
||
* Results:
|
||
* A boolean value: 1 if the palette is acceptable, 0 otherwise.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
IsValidPalette(
|
||
PhotoInstance *instancePtr, /* Instance to which the palette specification
|
||
* is to be applied. */
|
||
const char *palette) /* Palette specification string. */
|
||
{
|
||
int nRed, nGreen, nBlue, mono, numColors;
|
||
char *endp;
|
||
|
||
/*
|
||
* First parse the specification: it must be of the form %d or %d/%d/%d.
|
||
*/
|
||
|
||
nRed = strtol(palette, &endp, 10);
|
||
if ((endp == palette) || ((*endp != 0) && (*endp != '/'))
|
||
|| (nRed < 2) || (nRed > 256)) {
|
||
return 0;
|
||
}
|
||
|
||
if (*endp == 0) {
|
||
mono = 1;
|
||
nGreen = nBlue = nRed;
|
||
} else {
|
||
palette = endp + 1;
|
||
nGreen = strtol(palette, &endp, 10);
|
||
if ((endp == palette) || (*endp != '/') || (nGreen < 2)
|
||
|| (nGreen > 256)) {
|
||
return 0;
|
||
}
|
||
palette = endp + 1;
|
||
nBlue = strtol(palette, &endp, 10);
|
||
if ((endp == palette) || (*endp != 0) || (nBlue < 2)
|
||
|| (nBlue > 256)) {
|
||
return 0;
|
||
}
|
||
mono = 0;
|
||
}
|
||
|
||
switch (instancePtr->visualInfo.class) {
|
||
case DirectColor:
|
||
case TrueColor:
|
||
if ((nRed > (1 << CountBits(instancePtr->visualInfo.red_mask)))
|
||
|| (nGreen>(1<<CountBits(instancePtr->visualInfo.green_mask)))
|
||
|| (nBlue>(1<<CountBits(instancePtr->visualInfo.blue_mask)))) {
|
||
return 0;
|
||
}
|
||
break;
|
||
case PseudoColor:
|
||
case StaticColor:
|
||
numColors = nRed;
|
||
if (!mono) {
|
||
numColors *= nGreen*nBlue;
|
||
}
|
||
if (numColors > (1 << instancePtr->visualInfo.depth)) {
|
||
return 0;
|
||
}
|
||
break;
|
||
case GrayScale:
|
||
case StaticGray:
|
||
if (!mono || (nRed > (1 << instancePtr->visualInfo.depth))) {
|
||
return 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* CountBits --
|
||
*
|
||
* This function counts how many bits are set to 1 in `mask'.
|
||
*
|
||
* Results:
|
||
* The integer number of bits.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
CountBits(
|
||
pixel mask) /* Value to count the 1 bits in. */
|
||
{
|
||
int n;
|
||
|
||
for (n=0 ; mask!=0 ; mask&=mask-1) {
|
||
n++;
|
||
}
|
||
return n;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* GetColorTable --
|
||
*
|
||
* This function is called to allocate a table of colormap information
|
||
* for an instance of a photo image. Only one such table is allocated for
|
||
* all photo instances using the same display, colormap, palette and
|
||
* gamma values, so that the application need only request a set of
|
||
* colors from the X server once for all such photo widgets. This
|
||
* function maintains a hash table to find previously-allocated
|
||
* ColorTables.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* A new ColorTable may be allocated and placed in the hash table, and
|
||
* have colors allocated for it.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
GetColorTable(
|
||
PhotoInstance *instancePtr) /* Instance needing a color table. */
|
||
{
|
||
ColorTable *colorPtr;
|
||
Tcl_HashEntry *entry;
|
||
ColorTableId id;
|
||
int isNew;
|
||
|
||
/*
|
||
* Look for an existing ColorTable in the hash table.
|
||
*/
|
||
|
||
memset(&id, 0, sizeof(id));
|
||
id.display = instancePtr->display;
|
||
id.colormap = instancePtr->colormap;
|
||
id.palette = instancePtr->palette;
|
||
id.gamma = instancePtr->gamma;
|
||
if (!imgPhotoColorHashInitialized) {
|
||
Tcl_InitHashTable(&imgPhotoColorHash, N_COLOR_HASH);
|
||
imgPhotoColorHashInitialized = 1;
|
||
}
|
||
entry = Tcl_CreateHashEntry(&imgPhotoColorHash, (char *) &id, &isNew);
|
||
|
||
if (!isNew) {
|
||
/*
|
||
* Re-use the existing entry.
|
||
*/
|
||
|
||
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
||
} else {
|
||
/*
|
||
* No color table currently available; need to make one.
|
||
*/
|
||
|
||
colorPtr = (ColorTable *) ckalloc(sizeof(ColorTable));
|
||
|
||
/*
|
||
* The following line of code should not normally be needed due to the
|
||
* assignment in the following line. However, it compensates for bugs
|
||
* in some compilers (HP, for example) where sizeof(ColorTable) is 24
|
||
* but the assignment only copies 20 bytes, leaving 4 bytes
|
||
* uninitialized; these cause problems when using the id for lookups
|
||
* in imgPhotoColorHash, and can result in core dumps.
|
||
*/
|
||
|
||
memset(&colorPtr->id, 0, sizeof(ColorTableId));
|
||
colorPtr->id = id;
|
||
Tk_PreserveColormap(colorPtr->id.display, colorPtr->id.colormap);
|
||
colorPtr->flags = 0;
|
||
colorPtr->refCount = 0;
|
||
colorPtr->liveRefCount = 0;
|
||
colorPtr->numColors = 0;
|
||
colorPtr->visualInfo = instancePtr->visualInfo;
|
||
colorPtr->pixelMap = NULL;
|
||
Tcl_SetHashValue(entry, colorPtr);
|
||
}
|
||
|
||
colorPtr->refCount++;
|
||
colorPtr->liveRefCount++;
|
||
instancePtr->colorTablePtr = colorPtr;
|
||
if (colorPtr->flags & DISPOSE_PENDING) {
|
||
Tcl_CancelIdleCall(DisposeColorTable, (ClientData) colorPtr);
|
||
colorPtr->flags &= ~DISPOSE_PENDING;
|
||
}
|
||
|
||
/*
|
||
* Allocate colors for this color table if necessary.
|
||
*/
|
||
|
||
if ((colorPtr->numColors == 0)
|
||
&& ((colorPtr->flags & BLACK_AND_WHITE) == 0)) {
|
||
AllocateColors(colorPtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* FreeColorTable --
|
||
*
|
||
* This function is called when an instance ceases using a color table.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* If no other instances are using this color table, a when-idle handler
|
||
* is registered to free up the color table and the colors allocated for
|
||
* it.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
FreeColorTable(
|
||
ColorTable *colorPtr, /* Pointer to the color table which is no
|
||
* longer required by an instance. */
|
||
int force) /* Force free to happen immediately. */
|
||
{
|
||
colorPtr->refCount--;
|
||
if (colorPtr->refCount > 0) {
|
||
return;
|
||
}
|
||
|
||
if (force) {
|
||
if ((colorPtr->flags & DISPOSE_PENDING) != 0) {
|
||
Tcl_CancelIdleCall(DisposeColorTable, (ClientData) colorPtr);
|
||
colorPtr->flags &= ~DISPOSE_PENDING;
|
||
}
|
||
DisposeColorTable((ClientData) colorPtr);
|
||
} else if ((colorPtr->flags & DISPOSE_PENDING) == 0) {
|
||
Tcl_DoWhenIdle(DisposeColorTable, (ClientData) colorPtr);
|
||
colorPtr->flags |= DISPOSE_PENDING;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AllocateColors --
|
||
*
|
||
* This function allocates the colors required by a color table, and sets
|
||
* up the fields in the color table data structure which are used in
|
||
* dithering.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Colors are allocated from the X server. Fields in the color table data
|
||
* structure are updated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AllocateColors(
|
||
ColorTable *colorPtr) /* Pointer to the color table requiring colors
|
||
* to be allocated. */
|
||
{
|
||
int i, r, g, b, rMult, mono;
|
||
int numColors, nRed, nGreen, nBlue;
|
||
double fr, fg, fb, igam;
|
||
XColor *colors;
|
||
unsigned long *pixels;
|
||
|
||
/*
|
||
* 16-bit intensity value for i/n of full intensity.
|
||
*/
|
||
#define CFRAC(i, n) ((i) * 65535 / (n))
|
||
|
||
/* As for CFRAC, but apply exponent of g. */
|
||
#define CGFRAC(i, n, g) ((int)(65535 * pow((double)(i) / (n), (g))))
|
||
|
||
/*
|
||
* First parse the palette specification to get the required number of
|
||
* shades of each primary.
|
||
*/
|
||
|
||
mono = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed, &nGreen, &nBlue)
|
||
<= 1;
|
||
igam = 1.0 / colorPtr->id.gamma;
|
||
|
||
/*
|
||
* Each time around this loop, we reduce the number of colors we're trying
|
||
* to allocate until we succeed in allocating all of the colors we need.
|
||
*/
|
||
|
||
for (;;) {
|
||
/*
|
||
* If we are using 1 bit/pixel, we don't need to allocate any colors
|
||
* (we just use the foreground and background colors in the GC).
|
||
*/
|
||
|
||
if (mono && (nRed <= 2)) {
|
||
colorPtr->flags |= BLACK_AND_WHITE;
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Calculate the RGB coordinates of the colors we want to allocate and
|
||
* store them in *colors.
|
||
*/
|
||
|
||
if ((colorPtr->visualInfo.class == DirectColor)
|
||
|| (colorPtr->visualInfo.class == TrueColor)) {
|
||
|
||
/*
|
||
* Direct/True Color: allocate shades of red, green, blue
|
||
* independently.
|
||
*/
|
||
|
||
if (mono) {
|
||
numColors = nGreen = nBlue = nRed;
|
||
} else {
|
||
numColors = MAX(MAX(nRed, nGreen), nBlue);
|
||
}
|
||
colors = (XColor *) ckalloc(numColors * sizeof(XColor));
|
||
|
||
for (i = 0; i < numColors; ++i) {
|
||
if (igam == 1.0) {
|
||
colors[i].red = CFRAC(i, nRed - 1);
|
||
colors[i].green = CFRAC(i, nGreen - 1);
|
||
colors[i].blue = CFRAC(i, nBlue - 1);
|
||
} else {
|
||
colors[i].red = CGFRAC(i, nRed - 1, igam);
|
||
colors[i].green = CGFRAC(i, nGreen - 1, igam);
|
||
colors[i].blue = CGFRAC(i, nBlue - 1, igam);
|
||
}
|
||
}
|
||
} else {
|
||
/*
|
||
* PseudoColor, StaticColor, GrayScale or StaticGray visual: we
|
||
* have to allocate each color in the color cube separately.
|
||
*/
|
||
|
||
numColors = (mono) ? nRed: (nRed * nGreen * nBlue);
|
||
colors = (XColor *) ckalloc(numColors * sizeof(XColor));
|
||
|
||
if (!mono) {
|
||
/*
|
||
* Color display using a PseudoColor or StaticColor visual.
|
||
*/
|
||
|
||
i = 0;
|
||
for (r = 0; r < nRed; ++r) {
|
||
for (g = 0; g < nGreen; ++g) {
|
||
for (b = 0; b < nBlue; ++b) {
|
||
if (igam == 1.0) {
|
||
colors[i].red = CFRAC(r, nRed - 1);
|
||
colors[i].green = CFRAC(g, nGreen - 1);
|
||
colors[i].blue = CFRAC(b, nBlue - 1);
|
||
} else {
|
||
colors[i].red = CGFRAC(r, nRed - 1, igam);
|
||
colors[i].green = CGFRAC(g, nGreen - 1, igam);
|
||
colors[i].blue = CGFRAC(b, nBlue - 1, igam);
|
||
}
|
||
i++;
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
/*
|
||
* Monochrome display - allocate the shades of grey we want.
|
||
*/
|
||
|
||
for (i = 0; i < numColors; ++i) {
|
||
if (igam == 1.0) {
|
||
r = CFRAC(i, numColors - 1);
|
||
} else {
|
||
r = CGFRAC(i, numColors - 1, igam);
|
||
}
|
||
colors[i].red = colors[i].green = colors[i].blue = r;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Now try to allocate the colors we've calculated.
|
||
*/
|
||
|
||
pixels = (unsigned long *) ckalloc(numColors * sizeof(unsigned long));
|
||
for (i = 0; i < numColors; ++i) {
|
||
if (!XAllocColor(colorPtr->id.display, colorPtr->id.colormap,
|
||
&colors[i])) {
|
||
/*
|
||
* Can't get all the colors we want in the default colormap;
|
||
* first try freeing colors from other unused color tables.
|
||
*/
|
||
|
||
if (!ReclaimColors(&colorPtr->id, numColors - i)
|
||
|| !XAllocColor(colorPtr->id.display,
|
||
colorPtr->id.colormap, &colors[i])) {
|
||
/*
|
||
* Still can't allocate the color.
|
||
*/
|
||
|
||
break;
|
||
}
|
||
}
|
||
pixels[i] = colors[i].pixel;
|
||
}
|
||
|
||
/*
|
||
* If we didn't get all of the colors, reduce the resolution of the
|
||
* color cube, free the ones we got, and try again.
|
||
*/
|
||
|
||
if (i >= numColors) {
|
||
break;
|
||
}
|
||
XFreeColors(colorPtr->id.display, colorPtr->id.colormap, pixels, i, 0);
|
||
ckfree((char *) colors);
|
||
ckfree((char *) pixels);
|
||
|
||
if (!mono) {
|
||
if ((nRed == 2) && (nGreen == 2) && (nBlue == 2)) {
|
||
/*
|
||
* Fall back to 1-bit monochrome display.
|
||
*/
|
||
|
||
mono = 1;
|
||
} else {
|
||
/*
|
||
* Reduce the number of shades of each primary to about 3/4 of
|
||
* the previous value. This should reduce the total number of
|
||
* colors required to about half the previous value for
|
||
* PseudoColor displays.
|
||
*/
|
||
|
||
nRed = (nRed * 3 + 2) / 4;
|
||
nGreen = (nGreen * 3 + 2) / 4;
|
||
nBlue = (nBlue * 3 + 2) / 4;
|
||
}
|
||
} else {
|
||
/*
|
||
* Reduce the number of shades of gray to about 1/2.
|
||
*/
|
||
|
||
nRed = nRed / 2;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* We have allocated all of the necessary colors: fill in various fields
|
||
* of the ColorTable record.
|
||
*/
|
||
|
||
if (!mono) {
|
||
colorPtr->flags |= COLOR_WINDOW;
|
||
|
||
/*
|
||
* The following is a hairy hack. We only want to index into the
|
||
* pixelMap on colormap displays. However, if the display is on
|
||
* Windows, then we actually want to store the index not the value
|
||
* since we will be passing the color table into the TkPutImage call.
|
||
*/
|
||
|
||
#ifndef __WIN32__
|
||
if ((colorPtr->visualInfo.class != DirectColor)
|
||
&& (colorPtr->visualInfo.class != TrueColor)) {
|
||
colorPtr->flags |= MAP_COLORS;
|
||
}
|
||
#endif /* __WIN32__ */
|
||
}
|
||
|
||
colorPtr->numColors = numColors;
|
||
colorPtr->pixelMap = pixels;
|
||
|
||
/*
|
||
* Set up quantization tables for dithering.
|
||
*/
|
||
|
||
rMult = nGreen * nBlue;
|
||
for (i = 0; i < 256; ++i) {
|
||
r = (i * (nRed - 1) + 127) / 255;
|
||
if (mono) {
|
||
fr = (double) colors[r].red / 65535.0;
|
||
if (colorPtr->id.gamma != 1.0 ) {
|
||
fr = pow(fr, colorPtr->id.gamma);
|
||
}
|
||
colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
|
||
colorPtr->redValues[i] = colors[r].pixel;
|
||
} else {
|
||
g = (i * (nGreen - 1) + 127) / 255;
|
||
b = (i * (nBlue - 1) + 127) / 255;
|
||
if ((colorPtr->visualInfo.class == DirectColor)
|
||
|| (colorPtr->visualInfo.class == TrueColor)) {
|
||
colorPtr->redValues[i] =
|
||
colors[r].pixel & colorPtr->visualInfo.red_mask;
|
||
colorPtr->greenValues[i] =
|
||
colors[g].pixel & colorPtr->visualInfo.green_mask;
|
||
colorPtr->blueValues[i] =
|
||
colors[b].pixel & colorPtr->visualInfo.blue_mask;
|
||
} else {
|
||
r *= rMult;
|
||
g *= nBlue;
|
||
colorPtr->redValues[i] = r;
|
||
colorPtr->greenValues[i] = g;
|
||
colorPtr->blueValues[i] = b;
|
||
}
|
||
fr = (double) colors[r].red / 65535.0;
|
||
fg = (double) colors[g].green / 65535.0;
|
||
fb = (double) colors[b].blue / 65535.0;
|
||
if (colorPtr->id.gamma != 1.0) {
|
||
fr = pow(fr, colorPtr->id.gamma);
|
||
fg = pow(fg, colorPtr->id.gamma);
|
||
fb = pow(fb, colorPtr->id.gamma);
|
||
}
|
||
colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
|
||
colorPtr->colorQuant[1][i] = (int)(fg * 255.99);
|
||
colorPtr->colorQuant[2][i] = (int)(fb * 255.99);
|
||
}
|
||
}
|
||
|
||
ckfree((char *) colors);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DisposeColorTable --
|
||
*
|
||
* Release a color table and its associated resources.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The colors in the argument color table are freed, as is the color
|
||
* table structure itself. The color table is removed from the hash table
|
||
* which is used to locate color tables.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisposeColorTable(
|
||
ClientData clientData) /* Pointer to the ColorTable whose
|
||
* colors are to be released. */
|
||
{
|
||
ColorTable *colorPtr = (ColorTable *) clientData;
|
||
Tcl_HashEntry *entry;
|
||
|
||
if (colorPtr->pixelMap != NULL) {
|
||
if (colorPtr->numColors > 0) {
|
||
XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
|
||
colorPtr->pixelMap, colorPtr->numColors, 0);
|
||
Tk_FreeColormap(colorPtr->id.display, colorPtr->id.colormap);
|
||
}
|
||
ckfree((char *) colorPtr->pixelMap);
|
||
}
|
||
|
||
entry = Tcl_FindHashEntry(&imgPhotoColorHash, (char *) &colorPtr->id);
|
||
if (entry == NULL) {
|
||
Tcl_Panic("DisposeColorTable couldn't find hash entry");
|
||
}
|
||
Tcl_DeleteHashEntry(entry);
|
||
|
||
ckfree((char *) colorPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ReclaimColors --
|
||
*
|
||
* This function is called to try to free up colors in the colormap used
|
||
* by a color table. It looks for other color tables with the same
|
||
* colormap and with a zero live reference count, and frees their colors.
|
||
* It only does so if there is the possibility of freeing up at least
|
||
* `numColors' colors.
|
||
*
|
||
* Results:
|
||
* The return value is TRUE if any colors were freed, FALSE otherwise.
|
||
*
|
||
* Side effects:
|
||
* ColorTables which are not currently in use may lose their color
|
||
* allocations.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ReclaimColors(
|
||
ColorTableId *id, /* Pointer to information identifying
|
||
* the color table which needs more colors. */
|
||
int numColors) /* Number of colors required. */
|
||
{
|
||
Tcl_HashSearch srch;
|
||
Tcl_HashEntry *entry;
|
||
ColorTable *colorPtr;
|
||
int nAvail = 0;
|
||
|
||
/*
|
||
* First scan through the color hash table to get an upper bound on how
|
||
* many colors we might be able to free.
|
||
*/
|
||
|
||
entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
|
||
while (entry != NULL) {
|
||
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
||
if ((colorPtr->id.display == id->display)
|
||
&& (colorPtr->id.colormap == id->colormap)
|
||
&& (colorPtr->liveRefCount == 0 )&& (colorPtr->numColors != 0)
|
||
&& ((colorPtr->id.palette != id->palette)
|
||
|| (colorPtr->id.gamma != id->gamma))) {
|
||
/*
|
||
* We could take this guy's colors off him.
|
||
*/
|
||
|
||
nAvail += colorPtr->numColors;
|
||
}
|
||
entry = Tcl_NextHashEntry(&srch);
|
||
}
|
||
|
||
/*
|
||
* nAvail is an (over)estimate of the number of colors we could free.
|
||
*/
|
||
|
||
if (nAvail < numColors) {
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Scan through a second time freeing colors.
|
||
*/
|
||
|
||
entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
|
||
while ((entry != NULL) && (numColors > 0)) {
|
||
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
||
if ((colorPtr->id.display == id->display)
|
||
&& (colorPtr->id.colormap == id->colormap)
|
||
&& (colorPtr->liveRefCount == 0) && (colorPtr->numColors != 0)
|
||
&& ((colorPtr->id.palette != id->palette)
|
||
|| (colorPtr->id.gamma != id->gamma))) {
|
||
/*
|
||
* Free the colors that this ColorTable has.
|
||
*/
|
||
|
||
XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
|
||
colorPtr->pixelMap, colorPtr->numColors, 0);
|
||
numColors -= colorPtr->numColors;
|
||
colorPtr->numColors = 0;
|
||
ckfree((char *) colorPtr->pixelMap);
|
||
colorPtr->pixelMap = NULL;
|
||
}
|
||
|
||
entry = Tcl_NextHashEntry(&srch);
|
||
}
|
||
return 1; /* We freed some colors. */
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DisposeInstance --
|
||
*
|
||
* This function is called to finally free up an instance of a photo
|
||
* image which is no longer required.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The instance data structure and the resources it references are freed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisposeInstance(
|
||
ClientData clientData) /* Pointer to the instance whose resources are
|
||
* to be released. */
|
||
{
|
||
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
||
PhotoInstance *prevPtr;
|
||
|
||
if (instancePtr->pixels != None) {
|
||
Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
|
||
}
|
||
if (instancePtr->gc != None) {
|
||
Tk_FreeGC(instancePtr->display, instancePtr->gc);
|
||
}
|
||
if (instancePtr->imagePtr != NULL) {
|
||
XDestroyImage(instancePtr->imagePtr);
|
||
}
|
||
if (instancePtr->error != NULL) {
|
||
ckfree((char *) instancePtr->error);
|
||
}
|
||
if (instancePtr->colorTablePtr != NULL) {
|
||
FreeColorTable(instancePtr->colorTablePtr, 1);
|
||
}
|
||
|
||
if (instancePtr->masterPtr->instancePtr == instancePtr) {
|
||
instancePtr->masterPtr->instancePtr = instancePtr->nextPtr;
|
||
} else {
|
||
for (prevPtr = instancePtr->masterPtr->instancePtr;
|
||
prevPtr->nextPtr != instancePtr; prevPtr = prevPtr->nextPtr) {
|
||
/* Empty loop body. */
|
||
}
|
||
prevPtr->nextPtr = instancePtr->nextPtr;
|
||
}
|
||
Tk_FreeColormap(instancePtr->display, instancePtr->colormap);
|
||
ckfree((char *) instancePtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* MatchFileFormat --
|
||
*
|
||
* This function is called to find a photo image file format handler
|
||
* which can parse the image data in the given file. If a user-specified
|
||
* format string is provided, only handlers whose names match a prefix of
|
||
* the format string are tried.
|
||
*
|
||
* Results:
|
||
* A standard TCL return value. If the return value is TCL_OK, a pointer
|
||
* to the image format record is returned in *imageFormatPtr, and the
|
||
* width and height of the image are returned in *widthPtr and
|
||
* *heightPtr.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
MatchFileFormat(
|
||
Tcl_Interp *interp, /* Interpreter to use for reporting errors. */
|
||
Tcl_Channel chan, /* The image file, open for reading. */
|
||
char *fileName, /* The name of the image file. */
|
||
Tcl_Obj *formatObj, /* User-specified format string, or NULL. */
|
||
Tk_PhotoImageFormat **imageFormatPtr,
|
||
/* A pointer to the photo image format record
|
||
* is returned here. */
|
||
int *widthPtr, int *heightPtr,
|
||
/* The dimensions of the image are returned
|
||
* here. */
|
||
int *oldformat) /* Returns 1 if the old image API is used. */
|
||
{
|
||
int matched = 0, useoldformat = 0;
|
||
Tk_PhotoImageFormat *formatPtr;
|
||
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
||
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
||
char *formatString = NULL;
|
||
|
||
if (formatObj) {
|
||
formatString = Tcl_GetString(formatObj);
|
||
}
|
||
|
||
/*
|
||
* Scan through the table of file format handlers to find one which can
|
||
* handle the image.
|
||
*/
|
||
|
||
for (formatPtr = tsdPtr->formatList; formatPtr != NULL;
|
||
formatPtr = formatPtr->nextPtr) {
|
||
if (formatObj != NULL) {
|
||
if (strncasecmp(formatString,
|
||
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
||
continue;
|
||
}
|
||
matched = 1;
|
||
if (formatPtr->fileMatchProc == NULL) {
|
||
Tcl_AppendResult(interp, "-file option isn't supported for ",
|
||
formatString, " images", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
if (formatPtr->fileMatchProc != NULL) {
|
||
(void) Tcl_Seek(chan, Tcl_LongAsWide(0L), SEEK_SET);
|
||
|
||
if ((*formatPtr->fileMatchProc)(chan, fileName, formatObj,
|
||
widthPtr, heightPtr, interp)) {
|
||
if (*widthPtr < 1) {
|
||
*widthPtr = 1;
|
||
}
|
||
if (*heightPtr < 1) {
|
||
*heightPtr = 1;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (formatPtr == NULL) {
|
||
useoldformat = 1;
|
||
for (formatPtr = tsdPtr->oldFormatList; formatPtr != NULL;
|
||
formatPtr = formatPtr->nextPtr) {
|
||
if (formatString != NULL) {
|
||
if (strncasecmp(formatString,
|
||
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
||
continue;
|
||
}
|
||
matched = 1;
|
||
if (formatPtr->fileMatchProc == NULL) {
|
||
Tcl_AppendResult(interp, "-file option isn't supported",
|
||
" for ", formatString, " images", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
if (formatPtr->fileMatchProc != NULL) {
|
||
(void) Tcl_Seek(chan, Tcl_LongAsWide(0L), SEEK_SET);
|
||
if ((*formatPtr->fileMatchProc)(chan, fileName, (Tcl_Obj *)
|
||
formatString, widthPtr, heightPtr, interp)) {
|
||
if (*widthPtr < 1) {
|
||
*widthPtr = 1;
|
||
}
|
||
if (*heightPtr < 1) {
|
||
*heightPtr = 1;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (formatPtr == NULL) {
|
||
if ((formatObj != NULL) && !matched) {
|
||
Tcl_AppendResult(interp, "image file format \"", formatString,
|
||
"\" is not supported", NULL);
|
||
} else {
|
||
Tcl_AppendResult(interp,
|
||
"couldn't recognize data in image file \"", fileName, "\"",
|
||
NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
*imageFormatPtr = formatPtr;
|
||
*oldformat = useoldformat;
|
||
(void) Tcl_Seek(chan, Tcl_LongAsWide(0L), SEEK_SET);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* MatchStringFormat --
|
||
*
|
||
* This function is called to find a photo image file format handler
|
||
* which can parse the image data in the given string. If a
|
||
* user-specified format string is provided, only handlers whose names
|
||
* match a prefix of the format string are tried.
|
||
*
|
||
* Results:
|
||
* A standard TCL return value. If the return value is TCL_OK, a pointer
|
||
* to the image format record is returned in *imageFormatPtr, and the
|
||
* width and height of the image are returned in *widthPtr and
|
||
* *heightPtr.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
MatchStringFormat(
|
||
Tcl_Interp *interp, /* Interpreter to use for reporting errors. */
|
||
Tcl_Obj *data, /* Object containing the image data. */
|
||
Tcl_Obj *formatObj, /* User-specified format string, or NULL. */
|
||
Tk_PhotoImageFormat **imageFormatPtr,
|
||
/* A pointer to the photo image format record
|
||
* is returned here. */
|
||
int *widthPtr, int *heightPtr,
|
||
/* The dimensions of the image are returned
|
||
* here. */
|
||
int *oldformat) /* Returns 1 if the old image API is used. */
|
||
{
|
||
int matched = 0, useoldformat = 0;
|
||
Tk_PhotoImageFormat *formatPtr;
|
||
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
||
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
||
char *formatString = NULL;
|
||
|
||
if (formatObj) {
|
||
formatString = Tcl_GetString(formatObj);
|
||
}
|
||
|
||
/*
|
||
* Scan through the table of file format handlers to find one which can
|
||
* handle the image.
|
||
*/
|
||
|
||
for (formatPtr = tsdPtr->formatList; formatPtr != NULL;
|
||
formatPtr = formatPtr->nextPtr) {
|
||
if (formatObj != NULL) {
|
||
if (strncasecmp(formatString,
|
||
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
||
continue;
|
||
}
|
||
matched = 1;
|
||
if (formatPtr->stringMatchProc == NULL) {
|
||
Tcl_AppendResult(interp, "-data option isn't supported for ",
|
||
formatString, " images", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
if ((formatPtr->stringMatchProc != NULL)
|
||
&& (formatPtr->stringReadProc != NULL)
|
||
&& (*formatPtr->stringMatchProc)(data, formatObj,
|
||
widthPtr, heightPtr, interp)) {
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (formatPtr == NULL) {
|
||
useoldformat = 1;
|
||
for (formatPtr = tsdPtr->oldFormatList; formatPtr != NULL;
|
||
formatPtr = formatPtr->nextPtr) {
|
||
if (formatObj != NULL) {
|
||
if (strncasecmp(formatString,
|
||
formatPtr->name, strlen(formatPtr->name)) != 0) {
|
||
continue;
|
||
}
|
||
matched = 1;
|
||
if (formatPtr->stringMatchProc == NULL) {
|
||
Tcl_AppendResult(interp, "-data option isn't supported",
|
||
" for ", formatString, " images", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
if ((formatPtr->stringMatchProc != NULL)
|
||
&& (formatPtr->stringReadProc != NULL)
|
||
&& (*formatPtr->stringMatchProc)(
|
||
(Tcl_Obj *) Tcl_GetString(data),
|
||
(Tcl_Obj *) formatString,
|
||
widthPtr, heightPtr, interp)) {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (formatPtr == NULL) {
|
||
if ((formatObj != NULL) && !matched) {
|
||
Tcl_AppendResult(interp, "image format \"", formatString,
|
||
"\" is not supported", NULL);
|
||
} else {
|
||
Tcl_AppendResult(interp, "couldn't recognize image data", NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
*imageFormatPtr = formatPtr;
|
||
*oldformat = useoldformat;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_FindPhoto --
|
||
*
|
||
* This function is called to get an opaque handle (actually a
|
||
* PhotoMaster *) for a given image, which can be used in subsequent
|
||
* calls to Tk_PhotoPutBlock, etc. The `name' parameter is the name of
|
||
* the image.
|
||
*
|
||
* Results:
|
||
* The handle for the photo image, or NULL if there is no photo image
|
||
* with the name given.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tk_PhotoHandle
|
||
Tk_FindPhoto(
|
||
Tcl_Interp *interp, /* Interpreter (application) in which image
|
||
* exists. */
|
||
CONST char *imageName) /* Name of the desired photo image. */
|
||
{
|
||
ClientData clientData;
|
||
Tk_ImageType *typePtr;
|
||
|
||
clientData = Tk_GetImageMasterData(interp, imageName, &typePtr);
|
||
if ((typePtr == NULL) || (typePtr->name != tkPhotoImageType.name)) {
|
||
return NULL;
|
||
}
|
||
return (Tk_PhotoHandle) clientData;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoPutBlock --
|
||
*
|
||
* This function is called to put image data into a photo image.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result code.
|
||
*
|
||
* Side effects:
|
||
* The image data is stored. The image may be expanded. The Tk image code
|
||
* is informed that the image has changed. If the result code is
|
||
* TCL_ERROR, an error message will be placed in the interpreter (if
|
||
* non-NULL).
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PhotoPutBlock(
|
||
Tcl_Interp *interp, /* Interpreter for passing back error
|
||
* messages, or NULL. */
|
||
Tk_PhotoHandle handle, /* Opaque handle for the photo image to be
|
||
* updated. */
|
||
register Tk_PhotoImageBlock *blockPtr,
|
||
/* Pointer to a structure describing the pixel
|
||
* data to be copied into the image. */
|
||
int x, int y, /* Coordinates of the top-left pixel to be
|
||
* updated in the image. */
|
||
int width, int height, /* Dimensions of the area of the image to be
|
||
* updated. */
|
||
int compRule) /* Compositing rule to use when processing
|
||
* transparent pixels. */
|
||
{
|
||
register PhotoMaster *masterPtr;
|
||
int xEnd, yEnd, greenOffset, blueOffset, alphaOffset;
|
||
int wLeft, hLeft, wCopy, hCopy, pitch;
|
||
unsigned char *srcPtr, *srcLinePtr, *destPtr, *destLinePtr;
|
||
int sourceIsSimplePhoto = compRule & SOURCE_IS_SIMPLE_ALPHA_PHOTO;
|
||
XRectangle rect;
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
compRule &= ~SOURCE_IS_SIMPLE_ALPHA_PHOTO;
|
||
|
||
if ((masterPtr->userWidth != 0) && ((x + width) > masterPtr->userWidth)) {
|
||
width = masterPtr->userWidth - x;
|
||
}
|
||
if ((masterPtr->userHeight != 0)
|
||
&& ((y + height) > masterPtr->userHeight)) {
|
||
height = masterPtr->userHeight - y;
|
||
}
|
||
if ((width <= 0) || (height <= 0)) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
xEnd = x + width;
|
||
yEnd = y + height;
|
||
if ((xEnd > masterPtr->width) || (yEnd > masterPtr->height)) {
|
||
int sameSrc = (blockPtr->pixelPtr == masterPtr->pix32);
|
||
|
||
if (ImgPhotoSetSize(masterPtr, MAX(xEnd, masterPtr->width),
|
||
MAX(yEnd, masterPtr->height)) == TCL_ERROR) {
|
||
if (interp != NULL) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
if (sameSrc) {
|
||
blockPtr->pixelPtr = masterPtr->pix32;
|
||
blockPtr->pitch = masterPtr->width * 4;
|
||
}
|
||
}
|
||
|
||
if ((y < masterPtr->ditherY) || ((y == masterPtr->ditherY)
|
||
&& (x < masterPtr->ditherX))) {
|
||
/*
|
||
* The dithering isn't correct past the start of this block.
|
||
*/
|
||
|
||
masterPtr->ditherX = x;
|
||
masterPtr->ditherY = y;
|
||
}
|
||
|
||
/*
|
||
* If this image block could have different red, green and blue
|
||
* components, mark it as a color image.
|
||
*/
|
||
|
||
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
||
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
||
alphaOffset = blockPtr->offset[3];
|
||
if ((alphaOffset >= blockPtr->pixelSize) || (alphaOffset < 0)) {
|
||
alphaOffset = 0;
|
||
sourceIsSimplePhoto = 1;
|
||
} else {
|
||
alphaOffset -= blockPtr->offset[0];
|
||
}
|
||
if ((greenOffset != 0) || (blueOffset != 0)) {
|
||
masterPtr->flags |= COLOR_IMAGE;
|
||
}
|
||
|
||
/*
|
||
* Copy the data into our local 32-bit/pixel array. If we can do it with a
|
||
* single memmove, we do.
|
||
*/
|
||
|
||
destLinePtr = masterPtr->pix32 + (y * masterPtr->width + x) * 4;
|
||
pitch = masterPtr->width * 4;
|
||
|
||
/*
|
||
* Test to see if we can do the whole write in a single copy. This test is
|
||
* probably too restrictive. We should also be able to do a memmove if
|
||
* pixelSize == 3 and alphaOffset == 0. Maybe other cases too.
|
||
*/
|
||
|
||
if ((blockPtr->pixelSize == 4)
|
||
&& (greenOffset == 1) && (blueOffset == 2) && (alphaOffset == 3)
|
||
&& (width <= blockPtr->width) && (height <= blockPtr->height)
|
||
&& ((height == 1) || ((x == 0) && (width == masterPtr->width)
|
||
&& (blockPtr->pitch == pitch)))
|
||
&& (compRule == TK_PHOTO_COMPOSITE_SET)) {
|
||
memmove(destLinePtr, blockPtr->pixelPtr + blockPtr->offset[0],
|
||
(size_t) (height * width * 4));
|
||
|
||
/*
|
||
* We know there's an alpha offset and we're setting the data, so skip
|
||
* directly to the point when we recompute the photo validity region.
|
||
*/
|
||
|
||
goto recalculateValidRegion;
|
||
}
|
||
|
||
/*
|
||
* Copy and merge pixels according to the compositing rule.
|
||
*/
|
||
|
||
for (hLeft = height; hLeft > 0;) {
|
||
int pixelSize = blockPtr->pixelSize;
|
||
int compRuleSet = (compRule == TK_PHOTO_COMPOSITE_SET);
|
||
|
||
srcLinePtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
||
hCopy = MIN(hLeft, blockPtr->height);
|
||
hLeft -= hCopy;
|
||
for (; hCopy > 0; --hCopy) {
|
||
/*
|
||
* If the layout of the source line matches our memory layout and
|
||
* we're setting, we can just copy the bytes directly, which is
|
||
* much faster.
|
||
*/
|
||
|
||
if ((pixelSize == 4) && (greenOffset == 1)
|
||
&& (blueOffset == 2) && (alphaOffset == 3)
|
||
&& (width <= blockPtr->width)
|
||
&& compRuleSet) {
|
||
memcpy(destLinePtr, srcLinePtr, (size_t) (width * 4));
|
||
srcLinePtr += blockPtr->pitch;
|
||
destLinePtr += pitch;
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* Have to copy the slow way.
|
||
*/
|
||
|
||
destPtr = destLinePtr;
|
||
for (wLeft = width; wLeft > 0;) {
|
||
wCopy = MIN(wLeft, blockPtr->width);
|
||
wLeft -= wCopy;
|
||
srcPtr = srcLinePtr;
|
||
|
||
/*
|
||
* But we might be lucky and be able to use fairly fast loops.
|
||
* It's worth checking...
|
||
*/
|
||
|
||
if (alphaOffset == 0) {
|
||
/*
|
||
* This is the non-alpha case, so can still be fairly
|
||
* fast. Note that in the non-alpha-source case, the
|
||
* compositing rule doesn't apply.
|
||
*/
|
||
|
||
for (; wCopy>0 ; --wCopy, srcPtr+=pixelSize) {
|
||
*destPtr++ = srcPtr[0];
|
||
*destPtr++ = srcPtr[greenOffset];
|
||
*destPtr++ = srcPtr[blueOffset];
|
||
*destPtr++ = 255;
|
||
}
|
||
continue;
|
||
} else if (compRuleSet) {
|
||
/*
|
||
* This is the SET compositing rule, which just replaces
|
||
* what was there before with the new data. This is
|
||
* another fairly fast case. No point in doing a memcpy();
|
||
* the order of channels is probably wrong.
|
||
*/
|
||
|
||
for (; wCopy>0 ; --wCopy, srcPtr+=pixelSize) {
|
||
*destPtr++ = srcPtr[0];
|
||
*destPtr++ = srcPtr[greenOffset];
|
||
*destPtr++ = srcPtr[blueOffset];
|
||
*destPtr++ = srcPtr[alphaOffset];
|
||
}
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* Bother; need to consider the alpha value of each pixel to
|
||
* know what to do.
|
||
*/
|
||
|
||
for (; wCopy>0 ; --wCopy, srcPtr+=pixelSize) {
|
||
int alpha = srcPtr[alphaOffset];
|
||
|
||
if (alpha == 255 || !destPtr[3]) {
|
||
/*
|
||
* Either the source is 100% opaque, or the
|
||
* destination is entirely blank. In all cases, we
|
||
* just set the destination to the source.
|
||
*/
|
||
|
||
*destPtr++ = srcPtr[0];
|
||
*destPtr++ = srcPtr[greenOffset];
|
||
*destPtr++ = srcPtr[blueOffset];
|
||
*destPtr++ = alpha;
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* Can still skip doing work if the source is 100%
|
||
* transparent at this point.
|
||
*/
|
||
|
||
if (alpha) {
|
||
int Alpha = destPtr[3];
|
||
|
||
/*
|
||
* OK, there's real work to be done. Luckily, there's
|
||
* a substantial literature on what to do in this
|
||
* case. In particular, Porter and Duff have done a
|
||
* taxonomy of compositing rules, and the right one is
|
||
* the "Source Over" rule. This code implements that.
|
||
*/
|
||
|
||
destPtr[0] = PD_SRC_OVER(srcPtr[0], alpha, destPtr[0],
|
||
Alpha);
|
||
destPtr[1] = PD_SRC_OVER(srcPtr[greenOffset], alpha,
|
||
destPtr[1], Alpha);
|
||
destPtr[2] = PD_SRC_OVER(srcPtr[blueOffset], alpha,
|
||
destPtr[2], Alpha);
|
||
destPtr[3] = PD_SRC_OVER_ALPHA(alpha, Alpha);
|
||
}
|
||
|
||
destPtr += 4;
|
||
}
|
||
}
|
||
srcLinePtr += blockPtr->pitch;
|
||
destLinePtr += pitch;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Add this new block to the region which specifies which data is valid.
|
||
*/
|
||
|
||
if (alphaOffset) {
|
||
/*
|
||
* This block is grossly inefficient. For each row in the image, it
|
||
* finds each continguous string of nontransparent pixels, then marks
|
||
* those areas as valid in the validRegion mask. This makes drawing
|
||
* very efficient, because of the way we use X: we just say, here's
|
||
* your mask, and here's your data. We need not worry about the
|
||
* current background color, etc. But this costs us a lot on the image
|
||
* setup. Still, image setup only happens once, whereas the drawing
|
||
* happens many times, so this might be the best way to go.
|
||
*
|
||
* An alternative might be to not set up this mask, and instead, at
|
||
* drawing time, for each transparent pixel, set its color to the
|
||
* color of the background behind that pixel. This is what I suspect
|
||
* most of programs do. However, they don't have to deal with the
|
||
* canvas, which could have many different background colors.
|
||
* Determining the correct bg color for a given pixel might be
|
||
* expensive.
|
||
*/
|
||
|
||
if (compRule != TK_PHOTO_COMPOSITE_OVERLAY) {
|
||
TkRegion workRgn;
|
||
|
||
/*
|
||
* Don't need this when using the OVERLAY compositing rule, which
|
||
* always strictly increases the valid region.
|
||
*/
|
||
|
||
recalculateValidRegion:
|
||
workRgn = TkCreateRegion();
|
||
rect.x = x;
|
||
rect.y = y;
|
||
rect.width = width;
|
||
rect.height = height;
|
||
TkUnionRectWithRegion(&rect, workRgn, workRgn);
|
||
TkSubtractRegion(masterPtr->validRegion, workRgn,
|
||
masterPtr->validRegion);
|
||
TkDestroyRegion(workRgn);
|
||
}
|
||
|
||
/*
|
||
* Factorize out the main part of the building of the region data to
|
||
* allow for more efficient per-platform implementations. [Bug 919066]
|
||
*/
|
||
|
||
TkpBuildRegionFromAlphaData(masterPtr->validRegion, (unsigned) x,
|
||
(unsigned) y, (unsigned) width, (unsigned) height,
|
||
masterPtr->pix32 + (y * masterPtr->width + x) * 4 + 3,
|
||
4, (unsigned) masterPtr->width * 4);
|
||
} else {
|
||
rect.x = x;
|
||
rect.y = y;
|
||
rect.width = width;
|
||
rect.height = height;
|
||
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
||
masterPtr->validRegion);
|
||
}
|
||
|
||
/*
|
||
* Check if display code needs alpha blending...
|
||
*/
|
||
|
||
if (!sourceIsSimplePhoto && (width == 1) && (height == 1)) {
|
||
/*
|
||
* Optimize the single pixel case if we can. This speeds up code that
|
||
* builds up large simple-alpha images by single pixels. We don't
|
||
* negate COMPLEX_ALPHA in this case. [Bug 1409140]
|
||
*/
|
||
|
||
if (!(masterPtr->flags & COMPLEX_ALPHA)) {
|
||
unsigned char newAlpha;
|
||
|
||
destLinePtr = masterPtr->pix32 + (y * masterPtr->width + x) * 4;
|
||
newAlpha = destLinePtr[3];
|
||
|
||
if (newAlpha && newAlpha != 255) {
|
||
masterPtr->flags |= COMPLEX_ALPHA;
|
||
}
|
||
}
|
||
} else if ((alphaOffset != 0) || (masterPtr->flags & COMPLEX_ALPHA)) {
|
||
/*
|
||
* Check for partial transparency if alpha pixels are specified, or
|
||
* rescan if we already knew such pixels existed. To restrict this
|
||
* Toggle to only checking the changed pixels requires knowing where
|
||
* the alpha pixels are.
|
||
*/
|
||
|
||
ToggleComplexAlphaIfNeeded(masterPtr);
|
||
}
|
||
|
||
/*
|
||
* Update each instance.
|
||
*/
|
||
|
||
Tk_DitherPhoto((Tk_PhotoHandle)masterPtr, x, y, width, height);
|
||
|
||
/*
|
||
* Tell the core image code that this image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, x, y, width, height,
|
||
masterPtr->width, masterPtr->height);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoPutZoomedBlock --
|
||
*
|
||
* This function is called to put image data into a photo image, with
|
||
* possible subsampling and/or zooming of the pixels.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The image data is stored. The image may be expanded. The Tk image code
|
||
* is informed that the image has changed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PhotoPutZoomedBlock(
|
||
Tcl_Interp *interp, /* Interpreter for passing back error
|
||
* messages, or NULL. */
|
||
Tk_PhotoHandle handle, /* Opaque handle for the photo image to be
|
||
* updated. */
|
||
register Tk_PhotoImageBlock *blockPtr,
|
||
/* Pointer to a structure describing the pixel
|
||
* data to be copied into the image. */
|
||
int x, int y, /* Coordinates of the top-left pixel to be
|
||
* updated in the image. */
|
||
int width, int height, /* Dimensions of the area of the image to be
|
||
* updated. */
|
||
int zoomX, int zoomY, /* Zoom factors for the X and Y axes. */
|
||
int subsampleX, int subsampleY,
|
||
/* Subsampling factors for the X and Y
|
||
* axes. */
|
||
int compRule) /* Compositing rule to use when processing
|
||
* transparent pixels. */
|
||
{
|
||
register PhotoMaster *masterPtr = (PhotoMaster *) handle;
|
||
int xEnd, yEnd, greenOffset, blueOffset, alphaOffset;
|
||
int wLeft, hLeft, wCopy, hCopy, blockWid, blockHt;
|
||
unsigned char *srcPtr, *srcLinePtr, *srcOrigPtr, *destPtr, *destLinePtr;
|
||
int pitch, xRepeat, yRepeat, blockXSkip, blockYSkip, sourceIsSimplePhoto;
|
||
XRectangle rect;
|
||
|
||
if (zoomX==1 && zoomY==1 && subsampleX==1 && subsampleY==1) {
|
||
return Tk_PhotoPutBlock(interp, handle, blockPtr, x, y, width, height,
|
||
compRule);
|
||
}
|
||
|
||
sourceIsSimplePhoto = compRule & SOURCE_IS_SIMPLE_ALPHA_PHOTO;
|
||
compRule &= ~SOURCE_IS_SIMPLE_ALPHA_PHOTO;
|
||
|
||
if (zoomX <= 0 || zoomY <= 0) {
|
||
return TCL_OK;
|
||
}
|
||
if ((masterPtr->userWidth != 0) && ((x + width) > masterPtr->userWidth)) {
|
||
width = masterPtr->userWidth - x;
|
||
}
|
||
if ((masterPtr->userHeight != 0)
|
||
&& ((y + height) > masterPtr->userHeight)) {
|
||
height = masterPtr->userHeight - y;
|
||
}
|
||
if (width <= 0 || height <= 0) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
xEnd = x + width;
|
||
yEnd = y + height;
|
||
if ((xEnd > masterPtr->width) || (yEnd > masterPtr->height)) {
|
||
int sameSrc = (blockPtr->pixelPtr == masterPtr->pix32);
|
||
if (ImgPhotoSetSize(masterPtr, MAX(xEnd, masterPtr->width),
|
||
MAX(yEnd, masterPtr->height)) == TCL_ERROR) {
|
||
if (interp != NULL) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
if (sameSrc) {
|
||
blockPtr->pixelPtr = masterPtr->pix32;
|
||
blockPtr->pitch = masterPtr->width * 4;
|
||
}
|
||
}
|
||
|
||
if ((y < masterPtr->ditherY) || ((y == masterPtr->ditherY)
|
||
&& (x < masterPtr->ditherX))) {
|
||
/*
|
||
* The dithering isn't correct past the start of this block.
|
||
*/
|
||
|
||
masterPtr->ditherX = x;
|
||
masterPtr->ditherY = y;
|
||
}
|
||
|
||
/*
|
||
* If this image block could have different red, green and blue
|
||
* components, mark it as a color image.
|
||
*/
|
||
|
||
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
||
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
||
alphaOffset = blockPtr->offset[3];
|
||
if ((alphaOffset >= blockPtr->pixelSize) || (alphaOffset < 0)) {
|
||
alphaOffset = 0;
|
||
sourceIsSimplePhoto = 1;
|
||
} else {
|
||
alphaOffset -= blockPtr->offset[0];
|
||
}
|
||
if ((greenOffset != 0) || (blueOffset != 0)) {
|
||
masterPtr->flags |= COLOR_IMAGE;
|
||
}
|
||
|
||
/*
|
||
* Work out what area the pixel data in the block expands to after
|
||
* subsampling and zooming.
|
||
*/
|
||
|
||
blockXSkip = subsampleX * blockPtr->pixelSize;
|
||
blockYSkip = subsampleY * blockPtr->pitch;
|
||
if (subsampleX > 0) {
|
||
blockWid = ((blockPtr->width + subsampleX - 1) / subsampleX) * zoomX;
|
||
} else if (subsampleX == 0) {
|
||
blockWid = width;
|
||
} else {
|
||
blockWid = ((blockPtr->width - subsampleX - 1) / -subsampleX) * zoomX;
|
||
}
|
||
if (subsampleY > 0) {
|
||
blockHt = ((blockPtr->height + subsampleY - 1) / subsampleY) * zoomY;
|
||
} else if (subsampleY == 0) {
|
||
blockHt = height;
|
||
} else {
|
||
blockHt = ((blockPtr->height - subsampleY - 1) / -subsampleY) * zoomY;
|
||
}
|
||
|
||
/*
|
||
* Copy the data into our local 32-bit/pixel array.
|
||
*/
|
||
|
||
destLinePtr = masterPtr->pix32 + (y * masterPtr->width + x) * 4;
|
||
srcOrigPtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
||
if (subsampleX < 0) {
|
||
srcOrigPtr += (blockPtr->width - 1) * blockPtr->pixelSize;
|
||
}
|
||
if (subsampleY < 0) {
|
||
srcOrigPtr += (blockPtr->height - 1) * blockPtr->pitch;
|
||
}
|
||
|
||
pitch = masterPtr->width * 4;
|
||
for (hLeft = height; hLeft > 0; ) {
|
||
hCopy = MIN(hLeft, blockHt);
|
||
hLeft -= hCopy;
|
||
yRepeat = zoomY;
|
||
srcLinePtr = srcOrigPtr;
|
||
for (; hCopy > 0; --hCopy) {
|
||
destPtr = destLinePtr;
|
||
for (wLeft = width; wLeft > 0;) {
|
||
wCopy = MIN(wLeft, blockWid);
|
||
wLeft -= wCopy;
|
||
srcPtr = srcLinePtr;
|
||
for (; wCopy > 0; wCopy -= zoomX) {
|
||
for (xRepeat = MIN(wCopy, zoomX); xRepeat > 0; xRepeat--) {
|
||
int alpha = srcPtr[alphaOffset];/* Source alpha. */
|
||
|
||
/*
|
||
* Common case (solid pixels) first
|
||
*/
|
||
|
||
if (!alphaOffset || (alpha == 255)) {
|
||
*destPtr++ = srcPtr[0];
|
||
*destPtr++ = srcPtr[greenOffset];
|
||
*destPtr++ = srcPtr[blueOffset];
|
||
*destPtr++ = 255;
|
||
continue;
|
||
}
|
||
|
||
if (compRule==TK_PHOTO_COMPOSITE_SET || !destPtr[3]) {
|
||
/*
|
||
* Either this is the SET rule (we overwrite
|
||
* whatever is there) or the destination is
|
||
* entirely blank. In both cases, we just set the
|
||
* destination to the source.
|
||
*/
|
||
|
||
*destPtr++ = srcPtr[0];
|
||
*destPtr++ = srcPtr[greenOffset];
|
||
*destPtr++ = srcPtr[blueOffset];
|
||
*destPtr++ = alpha;
|
||
} else if (alpha) {
|
||
int Alpha = destPtr[3]; /* Destination
|
||
* alpha. */
|
||
|
||
destPtr[0] = PD_SRC_OVER(srcPtr[0], alpha,
|
||
destPtr[0], Alpha);
|
||
destPtr[1] = PD_SRC_OVER(srcPtr[greenOffset],alpha,
|
||
destPtr[1], Alpha);
|
||
destPtr[2] = PD_SRC_OVER(srcPtr[blueOffset], alpha,
|
||
destPtr[2], Alpha);
|
||
destPtr[3] = PD_SRC_OVER_ALPHA(alpha, Alpha);
|
||
|
||
destPtr += 4;
|
||
} else {
|
||
destPtr += 4;
|
||
}
|
||
}
|
||
srcPtr += blockXSkip;
|
||
}
|
||
}
|
||
destLinePtr += pitch;
|
||
yRepeat--;
|
||
if (yRepeat <= 0) {
|
||
srcLinePtr += blockYSkip;
|
||
yRepeat = zoomY;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Recompute the region of data for which we have valid pixels to plot.
|
||
*/
|
||
|
||
if (alphaOffset) {
|
||
if (compRule != TK_PHOTO_COMPOSITE_OVERLAY) {
|
||
/*
|
||
* Don't need this when using the OVERLAY compositing rule, which
|
||
* always strictly increases the valid region.
|
||
*/
|
||
|
||
TkRegion workRgn = TkCreateRegion();
|
||
|
||
rect.x = x;
|
||
rect.y = y;
|
||
rect.width = width;
|
||
rect.height = 1;
|
||
TkUnionRectWithRegion(&rect, workRgn, workRgn);
|
||
TkSubtractRegion(masterPtr->validRegion, workRgn,
|
||
masterPtr->validRegion);
|
||
TkDestroyRegion(workRgn);
|
||
}
|
||
|
||
TkpBuildRegionFromAlphaData(masterPtr->validRegion,
|
||
(unsigned)x, (unsigned)y, (unsigned)width, (unsigned)height,
|
||
&masterPtr->pix32[(y * masterPtr->width + x) * 4 + 3], 4,
|
||
(unsigned) masterPtr->width * 4);
|
||
} else {
|
||
rect.x = x;
|
||
rect.y = y;
|
||
rect.width = width;
|
||
rect.height = height;
|
||
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
||
masterPtr->validRegion);
|
||
}
|
||
|
||
/*
|
||
* Check if display code needs alpha blending...
|
||
*/
|
||
|
||
if (!sourceIsSimplePhoto && (width == 1) && (height == 1)) {
|
||
/*
|
||
* Optimize the single pixel case if we can. This speeds up code that
|
||
* builds up large simple-alpha images by single pixels. We don't
|
||
* negate COMPLEX_ALPHA in this case. [Bug 1409140]
|
||
*/
|
||
if (!(masterPtr->flags & COMPLEX_ALPHA)) {
|
||
unsigned char newAlpha;
|
||
|
||
destLinePtr = masterPtr->pix32 + (y * masterPtr->width + x) * 4;
|
||
newAlpha = destLinePtr[3];
|
||
|
||
if (newAlpha && newAlpha != 255) {
|
||
masterPtr->flags |= COMPLEX_ALPHA;
|
||
}
|
||
}
|
||
} else if ((alphaOffset != 0) || (masterPtr->flags & COMPLEX_ALPHA)) {
|
||
/*
|
||
* Check for partial transparency if alpha pixels are specified, or
|
||
* rescan if we already knew such pixels existed. To restrict this
|
||
* Toggle to only checking the changed pixels requires knowing where
|
||
* the alpha pixels are.
|
||
*/
|
||
ToggleComplexAlphaIfNeeded(masterPtr);
|
||
}
|
||
|
||
/*
|
||
* Update each instance.
|
||
*/
|
||
|
||
Tk_DitherPhoto((Tk_PhotoHandle) masterPtr, x, y, width, height);
|
||
|
||
/*
|
||
* Tell the core image code that this image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, x, y, width, height, masterPtr->width,
|
||
masterPtr->height);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_DitherPhoto --
|
||
*
|
||
* This function is called to update an area of each instance's pixmap by
|
||
* dithering the corresponding area of the image master.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The pixmap of each instance of this image gets updated. The fields in
|
||
* *masterPtr indicating which area of the image is correctly dithered
|
||
* get updated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_DitherPhoto(
|
||
Tk_PhotoHandle photo, /* Image master whose instances are to be
|
||
* updated. */
|
||
int x, int y, /* Coordinates of the top-left pixel in the
|
||
* area to be dithered. */
|
||
int width, int height) /* Dimensions of the area to be dithered. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) photo;
|
||
PhotoInstance *instancePtr;
|
||
|
||
if ((width <= 0) || (height <= 0)) {
|
||
return;
|
||
}
|
||
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
DitherInstance(instancePtr, x, y, width, height);
|
||
}
|
||
|
||
/*
|
||
* Work out whether this block will be correctly dithered and whether it
|
||
* will extend the correctly dithered region.
|
||
*/
|
||
|
||
if (((y < masterPtr->ditherY)
|
||
|| ((y == masterPtr->ditherY) && (x <= masterPtr->ditherX)))
|
||
&& ((y + height) > (masterPtr->ditherY))) {
|
||
/*
|
||
* This block starts inside (or immediately after) the correctly
|
||
* dithered region, so the first scan line at least will be right.
|
||
* Furthermore this block extends into scanline masterPtr->ditherY.
|
||
*/
|
||
|
||
if ((x == 0) && (width == masterPtr->width)) {
|
||
/*
|
||
* We are doing the full width, therefore the dithering will be
|
||
* correct to the end.
|
||
*/
|
||
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY = y + height;
|
||
} else {
|
||
/*
|
||
* We are doing partial scanlines, therefore the
|
||
* correctly-dithered region will be extended by at most one scan
|
||
* line.
|
||
*/
|
||
|
||
if (x <= masterPtr->ditherX) {
|
||
masterPtr->ditherX = x + width;
|
||
if (masterPtr->ditherX >= masterPtr->width) {
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY++;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DitherInstance --
|
||
*
|
||
* This function is called to update an area of an instance's pixmap by
|
||
* dithering the corresponding area of the master.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The instance's pixmap gets updated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DitherInstance(
|
||
PhotoInstance *instancePtr, /* The instance to be updated. */
|
||
int xStart, int yStart, /* Coordinates of the top-left pixel in the
|
||
* block to be dithered. */
|
||
int width, int height) /* Dimensions of the block to be dithered. */
|
||
{
|
||
PhotoMaster *masterPtr = instancePtr->masterPtr;
|
||
ColorTable *colorPtr = instancePtr->colorTablePtr;
|
||
XImage *imagePtr;
|
||
int nLines, bigEndian, i, c, x, y, xEnd, doDithering = 1;
|
||
int bitsPerPixel, bytesPerLine, lineLength;
|
||
unsigned char *srcLinePtr;
|
||
schar *errLinePtr;
|
||
pixel firstBit, word, mask;
|
||
|
||
/*
|
||
* Turn dithering off in certain cases where it is not needed (TrueColor,
|
||
* DirectColor with many colors).
|
||
*/
|
||
|
||
if ((colorPtr->visualInfo.class == DirectColor)
|
||
|| (colorPtr->visualInfo.class == TrueColor)) {
|
||
int nRed, nGreen, nBlue, result;
|
||
|
||
result = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed,
|
||
&nGreen, &nBlue);
|
||
if ((nRed >= 256)
|
||
&& ((result == 1) || ((nGreen >= 256) && (nBlue >= 256)))) {
|
||
doDithering = 0;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* First work out how many lines to do at a time, then how many bytes
|
||
* we'll need for pixel storage, and allocate it.
|
||
*/
|
||
|
||
nLines = (MAX_PIXELS + width - 1) / width;
|
||
if (nLines < 1) {
|
||
nLines = 1;
|
||
}
|
||
if (nLines > height ) {
|
||
nLines = height;
|
||
}
|
||
|
||
imagePtr = instancePtr->imagePtr;
|
||
if (imagePtr == NULL) {
|
||
return; /* We must be really tight on memory. */
|
||
}
|
||
bitsPerPixel = imagePtr->bits_per_pixel;
|
||
bytesPerLine = ((bitsPerPixel * width + 31) >> 3) & ~3;
|
||
imagePtr->width = width;
|
||
imagePtr->height = nLines;
|
||
imagePtr->bytes_per_line = bytesPerLine;
|
||
imagePtr->data = (char *)
|
||
ckalloc((unsigned) (imagePtr->bytes_per_line * nLines));
|
||
bigEndian = imagePtr->bitmap_bit_order == MSBFirst;
|
||
firstBit = bigEndian? (1 << (imagePtr->bitmap_unit - 1)): 1;
|
||
|
||
lineLength = masterPtr->width * 3;
|
||
srcLinePtr = masterPtr->pix32 + (yStart * masterPtr->width + xStart) * 4;
|
||
errLinePtr = instancePtr->error + yStart * lineLength + xStart * 3;
|
||
xEnd = xStart + width;
|
||
|
||
/*
|
||
* Loop over the image, doing at most nLines lines before updating the
|
||
* screen image.
|
||
*/
|
||
|
||
for (; height > 0; height -= nLines) {
|
||
unsigned char *dstLinePtr = (unsigned char *) imagePtr->data;
|
||
int yEnd;
|
||
|
||
if (nLines > height) {
|
||
nLines = height;
|
||
}
|
||
yEnd = yStart + nLines;
|
||
for (y = yStart; y < yEnd; ++y) {
|
||
unsigned char *srcPtr = srcLinePtr;
|
||
schar *errPtr = errLinePtr;
|
||
unsigned char *destBytePtr = dstLinePtr;
|
||
pixel *destLongPtr = (pixel *) dstLinePtr;
|
||
|
||
if (colorPtr->flags & COLOR_WINDOW) {
|
||
/*
|
||
* Color window. We dither the three components independently,
|
||
* using Floyd-Steinberg dithering, which propagates errors
|
||
* from the quantization of pixels to the pixels below and to
|
||
* the right.
|
||
*/
|
||
|
||
for (x = xStart; x < xEnd; ++x) {
|
||
int col[3];
|
||
|
||
if (doDithering) {
|
||
for (i = 0; i < 3; ++i) {
|
||
/*
|
||
* Compute the error propagated into this pixel
|
||
* for this component. If e[x,y] is the array of
|
||
* quantization error values, we compute
|
||
* 7/16 * e[x-1,y] + 1/16 * e[x-1,y-1]
|
||
* + 5/16 * e[x,y-1] + 3/16 * e[x+1,y-1]
|
||
* and round it to an integer.
|
||
*
|
||
* The expression ((c + 2056) >> 4) - 128 computes
|
||
* round(c / 16), and works correctly on machines
|
||
* without a sign-extending right shift.
|
||
*/
|
||
|
||
c = (x > 0) ? errPtr[-3] * 7: 0;
|
||
if (y > 0) {
|
||
if (x > 0) {
|
||
c += errPtr[-lineLength-3];
|
||
}
|
||
c += errPtr[-lineLength] * 5;
|
||
if ((x + 1) < masterPtr->width) {
|
||
c += errPtr[-lineLength+3] * 3;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Add the propagated error to the value of this
|
||
* component, quantize it, and store the
|
||
* quantization error.
|
||
*/
|
||
|
||
c = ((c + 2056) >> 4) - 128 + *srcPtr++;
|
||
if (c < 0) {
|
||
c = 0;
|
||
} else if (c > 255) {
|
||
c = 255;
|
||
}
|
||
col[i] = colorPtr->colorQuant[i][c];
|
||
*errPtr++ = c - col[i];
|
||
}
|
||
} else {
|
||
/*
|
||
* Output is virtually continuous in this case, so
|
||
* don't bother dithering.
|
||
*/
|
||
|
||
col[0] = *srcPtr++;
|
||
col[1] = *srcPtr++;
|
||
col[2] = *srcPtr++;
|
||
}
|
||
srcPtr++;
|
||
|
||
/*
|
||
* Translate the quantized component values into an X
|
||
* pixel value, and store it in the image.
|
||
*/
|
||
|
||
i = colorPtr->redValues[col[0]]
|
||
+ colorPtr->greenValues[col[1]]
|
||
+ colorPtr->blueValues[col[2]];
|
||
if (colorPtr->flags & MAP_COLORS) {
|
||
i = colorPtr->pixelMap[i];
|
||
}
|
||
switch (bitsPerPixel) {
|
||
case NBBY:
|
||
*destBytePtr++ = i;
|
||
break;
|
||
#ifndef __WIN32__
|
||
/*
|
||
* This case is not valid for Windows because the
|
||
* image format is different from the pixel format in
|
||
* Win32. Eventually we need to fix the image code in
|
||
* Tk to use the Windows native image ordering. This
|
||
* would speed up the image code for all of the common
|
||
* sizes.
|
||
*/
|
||
|
||
case NBBY * sizeof(pixel):
|
||
*destLongPtr++ = i;
|
||
break;
|
||
#endif
|
||
default:
|
||
XPutPixel(imagePtr, x - xStart, y - yStart,
|
||
(unsigned) i);
|
||
}
|
||
}
|
||
|
||
} else if (bitsPerPixel > 1) {
|
||
/*
|
||
* Multibit monochrome window. The operation here is similar
|
||
* to the color window case above, except that there is only
|
||
* one component. If the master image is in color, use the
|
||
* luminance computed as
|
||
* 0.344 * red + 0.5 * green + 0.156 * blue.
|
||
*/
|
||
|
||
for (x = xStart; x < xEnd; ++x) {
|
||
c = (x > 0) ? errPtr[-1] * 7: 0;
|
||
if (y > 0) {
|
||
if (x > 0) {
|
||
c += errPtr[-lineLength-1];
|
||
}
|
||
c += errPtr[-lineLength] * 5;
|
||
if (x + 1 < masterPtr->width) {
|
||
c += errPtr[-lineLength+1] * 3;
|
||
}
|
||
}
|
||
c = ((c + 2056) >> 4) - 128;
|
||
|
||
if ((masterPtr->flags & COLOR_IMAGE) == 0) {
|
||
c += srcPtr[0];
|
||
} else {
|
||
c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
|
||
+ srcPtr[2] * 5 + 16) >> 5;
|
||
}
|
||
srcPtr += 4;
|
||
|
||
if (c < 0) {
|
||
c = 0;
|
||
} else if (c > 255) {
|
||
c = 255;
|
||
}
|
||
i = colorPtr->colorQuant[0][c];
|
||
*errPtr++ = c - i;
|
||
i = colorPtr->redValues[i];
|
||
switch (bitsPerPixel) {
|
||
case NBBY:
|
||
*destBytePtr++ = i;
|
||
break;
|
||
#ifndef __WIN32__
|
||
/*
|
||
* This case is not valid for Windows because the
|
||
* image format is different from the pixel format in
|
||
* Win32. Eventually we need to fix the image code in
|
||
* Tk to use the Windows native image ordering. This
|
||
* would speed up the image code for all of the common
|
||
* sizes.
|
||
*/
|
||
|
||
case NBBY * sizeof(pixel):
|
||
*destLongPtr++ = i;
|
||
break;
|
||
#endif
|
||
default:
|
||
XPutPixel(imagePtr, x - xStart, y - yStart,
|
||
(unsigned) i);
|
||
}
|
||
}
|
||
} else {
|
||
/*
|
||
* 1-bit monochrome window. This is similar to the multibit
|
||
* monochrome case above, except that the quantization is
|
||
* simpler (we only have black = 0 and white = 255), and we
|
||
* produce an XY-Bitmap.
|
||
*/
|
||
|
||
word = 0;
|
||
mask = firstBit;
|
||
for (x = xStart; x < xEnd; ++x) {
|
||
/*
|
||
* If we have accumulated a whole word, store it in the
|
||
* image and start a new word.
|
||
*/
|
||
|
||
if (mask == 0) {
|
||
*destLongPtr++ = word;
|
||
mask = firstBit;
|
||
word = 0;
|
||
}
|
||
|
||
c = (x > 0) ? errPtr[-1] * 7: 0;
|
||
if (y > 0) {
|
||
if (x > 0) {
|
||
c += errPtr[-lineLength-1];
|
||
}
|
||
c += errPtr[-lineLength] * 5;
|
||
if (x + 1 < masterPtr->width) {
|
||
c += errPtr[-lineLength+1] * 3;
|
||
}
|
||
}
|
||
c = ((c + 2056) >> 4) - 128;
|
||
|
||
if ((masterPtr->flags & COLOR_IMAGE) == 0) {
|
||
c += srcPtr[0];
|
||
} else {
|
||
c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
|
||
+ srcPtr[2] * 5 + 16) >> 5;
|
||
}
|
||
srcPtr += 4;
|
||
|
||
if (c < 0) {
|
||
c = 0;
|
||
} else if (c > 255) {
|
||
c = 255;
|
||
}
|
||
if (c >= 128) {
|
||
word |= mask;
|
||
*errPtr++ = c - 255;
|
||
} else {
|
||
*errPtr++ = c;
|
||
}
|
||
mask = bigEndian? (mask >> 1): (mask << 1);
|
||
}
|
||
*destLongPtr = word;
|
||
}
|
||
srcLinePtr += masterPtr->width * 4;
|
||
errLinePtr += lineLength;
|
||
dstLinePtr += bytesPerLine;
|
||
}
|
||
|
||
/*
|
||
* Update the pixmap for this instance with the block of pixels that
|
||
* we have just computed.
|
||
*/
|
||
|
||
TkPutImage(colorPtr->pixelMap, colorPtr->numColors,
|
||
instancePtr->display, instancePtr->pixels,
|
||
instancePtr->gc, imagePtr, 0, 0, xStart, yStart,
|
||
(unsigned) width, (unsigned) nLines);
|
||
yStart = yEnd;
|
||
}
|
||
|
||
ckfree(imagePtr->data);
|
||
imagePtr->data = NULL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoBlank --
|
||
*
|
||
* This function is called to clear an entire photo image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The valid region for the image is set to the null region. The generic
|
||
* image code is notified that the image has changed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoBlank(
|
||
Tk_PhotoHandle handle) /* Handle for the image to be blanked. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) handle;
|
||
PhotoInstance *instancePtr;
|
||
|
||
masterPtr->ditherX = masterPtr->ditherY = 0;
|
||
masterPtr->flags = 0;
|
||
|
||
/*
|
||
* The image has valid data nowhere.
|
||
*/
|
||
|
||
if (masterPtr->validRegion != NULL) {
|
||
TkDestroyRegion(masterPtr->validRegion);
|
||
}
|
||
masterPtr->validRegion = TkCreateRegion();
|
||
|
||
/*
|
||
* Clear out the 32-bit pixel storage array. Clear out the dithering error
|
||
* arrays for each instance.
|
||
*/
|
||
|
||
memset(masterPtr->pix32, 0,
|
||
(size_t) (masterPtr->width * masterPtr->height * 4));
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
if (instancePtr->error) {
|
||
memset(instancePtr->error, 0,
|
||
(size_t) (masterPtr->width * masterPtr->height
|
||
* 3 * sizeof(schar)));
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Tell the core image code that this image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
|
||
masterPtr->height, masterPtr->width, masterPtr->height);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoExpand --
|
||
*
|
||
* This function is called to request that a photo image be expanded if
|
||
* necessary to be at least `width' pixels wide and `height' pixels high.
|
||
* If the user has declared a definite image size (using the -width and
|
||
* -height configuration options) then this call has no effect.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The size of the photo image may change; if so the generic image code
|
||
* is informed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PhotoExpand(
|
||
Tcl_Interp *interp, /* Interpreter for passing back error
|
||
* messages, or NULL. */
|
||
Tk_PhotoHandle handle, /* Handle for the image to be expanded. */
|
||
int width, int height) /* Desired minimum dimensions of the image. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) handle;
|
||
|
||
if (width <= masterPtr->width) {
|
||
width = masterPtr->width;
|
||
}
|
||
if (height <= masterPtr->height) {
|
||
height = masterPtr->height;
|
||
}
|
||
if ((width != masterPtr->width) || (height != masterPtr->height)) {
|
||
if (ImgPhotoSetSize(masterPtr, MAX(width, masterPtr->width),
|
||
MAX(height, masterPtr->height)) == TCL_ERROR) {
|
||
if (interp != NULL) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0, masterPtr->width,
|
||
masterPtr->height);
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoGetSize --
|
||
*
|
||
* This function is called to obtain the current size of a photo image.
|
||
*
|
||
* Results:
|
||
* The image's width and height are returned in *widthp and *heightp.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoGetSize(
|
||
Tk_PhotoHandle handle, /* Handle for the image whose dimensions are
|
||
* requested. */
|
||
int *widthPtr, int *heightPtr)
|
||
/* The dimensions of the image are returned
|
||
* here. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) handle;
|
||
|
||
*widthPtr = masterPtr->width;
|
||
*heightPtr = masterPtr->height;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoSetSize --
|
||
*
|
||
* This function is called to set size of a photo image. This call is
|
||
* equivalent to using the -width and -height configuration options.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The size of the image may change; if so the generic image code is
|
||
* informed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PhotoSetSize(
|
||
Tcl_Interp *interp, /* Interpreter for passing back error
|
||
* messages, or NULL. */
|
||
Tk_PhotoHandle handle, /* Handle for the image whose size is to be
|
||
* set. */
|
||
int width, int height) /* New dimensions for the image. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) handle;
|
||
|
||
masterPtr->userWidth = width;
|
||
masterPtr->userHeight = height;
|
||
if (ImgPhotoSetSize(masterPtr, ((width > 0) ? width: masterPtr->width),
|
||
((height > 0) ? height: masterPtr->height)) == TCL_ERROR) {
|
||
if (interp != NULL) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, TK_PHOTO_ALLOC_FAILURE_MESSAGE, NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
|
||
masterPtr->width, masterPtr->height);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TkGetPhotoValidRegion --
|
||
*
|
||
* This function is called to get the part of the photo where there is
|
||
* valid data. Or, conversely, the part of the photo which is
|
||
* transparent.
|
||
*
|
||
* Results:
|
||
* A TkRegion value that indicates the current area of the photo that is
|
||
* valid. This value should not be used after any modification to the
|
||
* photo image.
|
||
*
|
||
* Side Effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
TkRegion
|
||
TkPhotoGetValidRegion(
|
||
Tk_PhotoHandle handle) /* Handle for the image whose valid region is
|
||
* to obtained. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) handle;
|
||
|
||
return masterPtr->validRegion;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgGetPhoto --
|
||
*
|
||
* This function is called to obtain image data from a photo image. This
|
||
* function fills in the Tk_PhotoImageBlock structure pointed to by
|
||
* `blockPtr' with details of the address and layout of the image data in
|
||
* memory.
|
||
*
|
||
* Results:
|
||
* A pointer to the allocated data which should be freed later. NULL if
|
||
* there is no need to free data because blockPtr->pixelPtr points
|
||
* directly to the image data.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static char *
|
||
ImgGetPhoto(
|
||
PhotoMaster *masterPtr, /* Handle for the photo image from which image
|
||
* data is desired. */
|
||
Tk_PhotoImageBlock *blockPtr,
|
||
/* Information about the address and layout of
|
||
* the image data is returned here. */
|
||
struct SubcommandOptions *optPtr)
|
||
{
|
||
unsigned char *pixelPtr;
|
||
int x, y, greenOffset, blueOffset, alphaOffset;
|
||
|
||
Tk_PhotoGetImage((Tk_PhotoHandle) masterPtr, blockPtr);
|
||
blockPtr->pixelPtr += optPtr->fromY * blockPtr->pitch
|
||
+ optPtr->fromX * blockPtr->pixelSize;
|
||
blockPtr->width = optPtr->fromX2 - optPtr->fromX;
|
||
blockPtr->height = optPtr->fromY2 - optPtr->fromY;
|
||
|
||
if (!(masterPtr->flags & COLOR_IMAGE) &&
|
||
(!(optPtr->options & OPT_BACKGROUND)
|
||
|| ((optPtr->background->red == optPtr->background->green)
|
||
&& (optPtr->background->red == optPtr->background->blue)))) {
|
||
blockPtr->offset[0] = blockPtr->offset[1] = blockPtr->offset[2];
|
||
}
|
||
alphaOffset = 0;
|
||
for (y = 0; y < blockPtr->height; y++) {
|
||
pixelPtr = blockPtr->pixelPtr + (y * blockPtr->pitch)
|
||
+ blockPtr->pixelSize - 1;
|
||
for (x = 0; x < blockPtr->width; x++) {
|
||
if (*pixelPtr != 255) {
|
||
alphaOffset = 3;
|
||
break;
|
||
}
|
||
pixelPtr += blockPtr->pixelSize;
|
||
}
|
||
if (alphaOffset) {
|
||
break;
|
||
}
|
||
}
|
||
if (!alphaOffset) {
|
||
blockPtr->offset[3]= -1; /* Tell caller alpha need not be read */
|
||
}
|
||
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
||
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
||
if (((optPtr->options & OPT_BACKGROUND) && alphaOffset) ||
|
||
((optPtr->options & OPT_GRAYSCALE) && (greenOffset||blueOffset))) {
|
||
int newPixelSize,x,y;
|
||
unsigned char *srcPtr, *destPtr;
|
||
char *data;
|
||
|
||
newPixelSize = (!(optPtr->options & OPT_BACKGROUND) && alphaOffset)
|
||
? 2 : 1;
|
||
if ((greenOffset||blueOffset) && !(optPtr->options & OPT_GRAYSCALE)) {
|
||
newPixelSize += 2;
|
||
}
|
||
data = ckalloc((unsigned int) (newPixelSize *
|
||
blockPtr->width * blockPtr->height));
|
||
srcPtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
||
destPtr = (unsigned char *) data;
|
||
if (!greenOffset && !blueOffset) {
|
||
for (y = blockPtr->height; y > 0; y--) {
|
||
for (x = blockPtr->width; x > 0; x--) {
|
||
*destPtr = *srcPtr;
|
||
srcPtr += blockPtr->pixelSize;
|
||
destPtr += newPixelSize;
|
||
}
|
||
srcPtr += blockPtr->pitch -
|
||
blockPtr->width * blockPtr->pixelSize;
|
||
}
|
||
} else if (optPtr->options & OPT_GRAYSCALE) {
|
||
for (y = blockPtr->height; y > 0; y--) {
|
||
for (x = blockPtr->width; x > 0; x--) {
|
||
*destPtr = (unsigned char) ((srcPtr[0]*11 + srcPtr[1]*16
|
||
+ srcPtr[2]*5 + 16) >> 5);
|
||
srcPtr += blockPtr->pixelSize;
|
||
destPtr += newPixelSize;
|
||
}
|
||
srcPtr += blockPtr->pitch -
|
||
blockPtr->width * blockPtr->pixelSize;
|
||
}
|
||
} else {
|
||
for (y = blockPtr->height; y > 0; y--) {
|
||
for (x = blockPtr->width; x > 0; x--) {
|
||
destPtr[0] = srcPtr[0];
|
||
destPtr[1] = srcPtr[1];
|
||
destPtr[2] = srcPtr[2];
|
||
srcPtr += blockPtr->pixelSize;
|
||
destPtr += newPixelSize;
|
||
}
|
||
srcPtr += blockPtr->pitch -
|
||
blockPtr->width * blockPtr->pixelSize;
|
||
}
|
||
}
|
||
srcPtr = blockPtr->pixelPtr + alphaOffset;
|
||
destPtr = (unsigned char *) data;
|
||
if (!alphaOffset) {
|
||
/*
|
||
* Nothing to be done.
|
||
*/
|
||
} else if (optPtr->options & OPT_BACKGROUND) {
|
||
if (newPixelSize > 2) {
|
||
int red = optPtr->background->red>>8;
|
||
int green = optPtr->background->green>>8;
|
||
int blue = optPtr->background->blue>>8;
|
||
|
||
for (y = blockPtr->height; y > 0; y--) {
|
||
for (x = blockPtr->width; x > 0; x--) {
|
||
destPtr[0] += (unsigned char) (((255 - *srcPtr) *
|
||
(red-destPtr[0])) / 255);
|
||
destPtr[1] += (unsigned char) (((255 - *srcPtr) *
|
||
(green-destPtr[1])) / 255);
|
||
destPtr[2] += (unsigned char) (((255 - *srcPtr) *
|
||
(blue-destPtr[2])) / 255);
|
||
srcPtr += blockPtr->pixelSize;
|
||
destPtr += newPixelSize;
|
||
}
|
||
srcPtr += blockPtr->pitch -
|
||
blockPtr->width * blockPtr->pixelSize;
|
||
}
|
||
} else {
|
||
int gray = (unsigned char) (((optPtr->background->red>>8) * 11
|
||
+ (optPtr->background->green>>8) * 16
|
||
+ (optPtr->background->blue>>8) * 5 + 16) >> 5);
|
||
|
||
for (y = blockPtr->height; y > 0; y--) {
|
||
for (x = blockPtr->width; x > 0; x--) {
|
||
destPtr[0] += ((255 - *srcPtr) *
|
||
(gray-destPtr[0])) / 255;
|
||
srcPtr += blockPtr->pixelSize;
|
||
destPtr += newPixelSize;
|
||
}
|
||
srcPtr += blockPtr->pitch -
|
||
blockPtr->width * blockPtr->pixelSize;
|
||
}
|
||
}
|
||
} else {
|
||
destPtr += newPixelSize-1;
|
||
for (y = blockPtr->height; y > 0; y--) {
|
||
for (x = blockPtr->width; x > 0; x--) {
|
||
*destPtr = *srcPtr;
|
||
srcPtr += blockPtr->pixelSize;
|
||
destPtr += newPixelSize;
|
||
}
|
||
srcPtr += blockPtr->pitch -
|
||
blockPtr->width * blockPtr->pixelSize;
|
||
}
|
||
}
|
||
blockPtr->pixelPtr = (unsigned char *) data;
|
||
blockPtr->pixelSize = newPixelSize;
|
||
blockPtr->pitch = newPixelSize * blockPtr->width;
|
||
blockPtr->offset[0] = 0;
|
||
if (newPixelSize>2) {
|
||
blockPtr->offset[1]= 1;
|
||
blockPtr->offset[2]= 2;
|
||
blockPtr->offset[3]= 3;
|
||
} else {
|
||
blockPtr->offset[1]= 0;
|
||
blockPtr->offset[2]= 0;
|
||
blockPtr->offset[3]= 1;
|
||
}
|
||
return data;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgStringWrite --
|
||
*
|
||
* Default string write function. The data is formatted in the default
|
||
* format as accepted by the "<img> put" command.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgStringWrite(
|
||
Tcl_Interp *interp,
|
||
Tcl_Obj *formatString,
|
||
Tk_PhotoImageBlock *blockPtr)
|
||
{
|
||
int row, col;
|
||
char *line, *linePtr;
|
||
unsigned char *pixelPtr;
|
||
int greenOffset, blueOffset;
|
||
Tcl_DString data;
|
||
|
||
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
||
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
||
|
||
Tcl_DStringInit(&data);
|
||
if ((blockPtr->width > 0) && (blockPtr->height > 0)) {
|
||
line = (char *) ckalloc((unsigned int) ((8 * blockPtr->width) + 2));
|
||
for (row=0; row<blockPtr->height; row++) {
|
||
pixelPtr = blockPtr->pixelPtr + blockPtr->offset[0] +
|
||
row * blockPtr->pitch;
|
||
linePtr = line;
|
||
for (col=0; col<blockPtr->width; col++) {
|
||
sprintf(linePtr, " #%02x%02x%02x", *pixelPtr,
|
||
pixelPtr[greenOffset], pixelPtr[blueOffset]);
|
||
pixelPtr += blockPtr->pixelSize;
|
||
linePtr += 8;
|
||
}
|
||
Tcl_DStringAppendElement(&data, line+1);
|
||
}
|
||
ckfree (line);
|
||
}
|
||
Tcl_DStringResult(interp, &data);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoGetImage --
|
||
*
|
||
* This function is called to obtain image data from a photo image. This
|
||
* function fills in the Tk_PhotoImageBlock structure pointed to by
|
||
* `blockPtr' with details of the address and layout of the image data in
|
||
* memory.
|
||
*
|
||
* Results:
|
||
* TRUE (1) indicating that image data is available, for backwards
|
||
* compatibility with the old photo widget.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PhotoGetImage(
|
||
Tk_PhotoHandle handle, /* Handle for the photo image from which image
|
||
* data is desired. */
|
||
Tk_PhotoImageBlock *blockPtr)
|
||
/* Information about the address and layout of
|
||
* the image data is returned here. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) handle;
|
||
|
||
blockPtr->pixelPtr = masterPtr->pix32;
|
||
blockPtr->width = masterPtr->width;
|
||
blockPtr->height = masterPtr->height;
|
||
blockPtr->pitch = masterPtr->width * 4;
|
||
blockPtr->pixelSize = 4;
|
||
blockPtr->offset[0] = 0;
|
||
blockPtr->offset[1] = 1;
|
||
blockPtr->offset[2] = 2;
|
||
blockPtr->offset[3] = 3;
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* PhotoOptionFind --
|
||
*
|
||
* Finds a specific Photo option.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* After commands are removed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
typedef struct OptionAssocData {
|
||
struct OptionAssocData *nextPtr;
|
||
/* Pointer to next OptionAssocData. */
|
||
Tcl_ObjCmdProc *command; /* Command associated with this option. */
|
||
char name[1]; /* Name of option (remaining chars) */
|
||
} OptionAssocData;
|
||
|
||
static Tcl_ObjCmdProc *
|
||
PhotoOptionFind(
|
||
Tcl_Interp *interp, /* Interpreter that is being deleted. */
|
||
Tcl_Obj *obj) /* Name of option to be found. */
|
||
{
|
||
int length;
|
||
char *name = Tcl_GetStringFromObj(obj, &length);
|
||
char *prevname = NULL;
|
||
Tcl_ObjCmdProc *proc = NULL;
|
||
OptionAssocData *list = (OptionAssocData *) Tcl_GetAssocData(interp,
|
||
"photoOption", NULL);
|
||
|
||
while (list != NULL) {
|
||
if (strncmp(name, list->name, (unsigned) length) == 0) {
|
||
if (proc != NULL) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_AppendResult(interp, "ambiguous option \"", name,
|
||
"\": must be ", prevname, NULL);
|
||
while (list->nextPtr != NULL) {
|
||
Tcl_AppendResult(interp, prevname, ", ",NULL);
|
||
list = list->nextPtr;
|
||
prevname = list->name;
|
||
}
|
||
Tcl_AppendResult(interp, ", or", prevname, NULL);
|
||
return NULL;
|
||
}
|
||
proc = list->command;
|
||
prevname = list->name;
|
||
}
|
||
list = list->nextPtr;
|
||
}
|
||
if (proc != NULL) {
|
||
Tcl_ResetResult(interp);
|
||
}
|
||
return proc;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* PhotoOptionCleanupProc --
|
||
*
|
||
* This function is invoked whenever an interpreter is deleted to cleanup
|
||
* the AssocData for "photoVisitor".
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Photo Visitor options are removed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
PhotoOptionCleanupProc(
|
||
ClientData clientData, /* Points to "photoVisitor" AssocData for the
|
||
* interpreter. */
|
||
Tcl_Interp *interp) /* Interpreter that is being deleted. */
|
||
{
|
||
OptionAssocData *list = (OptionAssocData *) clientData;
|
||
|
||
while (list != NULL) {
|
||
register OptionAssocData *ptr;
|
||
|
||
list = (ptr = list)->nextPtr;
|
||
ckfree((char *) ptr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_CreatePhotoOption --
|
||
*
|
||
* This function may be invoked to add a new kind of photo option to the
|
||
* core photo command supported by Tk.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* From now on, the new option will be useable by the photo command.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
MODULE_SCOPE void
|
||
Tk_CreatePhotoOption(
|
||
Tcl_Interp *interp, /* Interpreter. */
|
||
CONST char *name, /* Option name. */
|
||
Tcl_ObjCmdProc *proc) /* Function to execute command. */
|
||
{
|
||
OptionAssocData *typePtr2, *prevPtr, *ptr;
|
||
OptionAssocData *list = (OptionAssocData *)
|
||
Tcl_GetAssocData(interp, "photoOption", NULL);
|
||
|
||
/*
|
||
* If there's already a photo option with the given name, remove it.
|
||
*/
|
||
|
||
for (typePtr2 = list, prevPtr = NULL; typePtr2 != NULL;
|
||
prevPtr = typePtr2, typePtr2 = typePtr2->nextPtr) {
|
||
if (strcmp(typePtr2->name, name) == 0) {
|
||
if (prevPtr == NULL) {
|
||
list = typePtr2->nextPtr;
|
||
} else {
|
||
prevPtr->nextPtr = typePtr2->nextPtr;
|
||
}
|
||
ckfree((char *) typePtr2);
|
||
break;
|
||
}
|
||
}
|
||
ptr = (OptionAssocData *) ckalloc(sizeof(OptionAssocData) + strlen(name));
|
||
strcpy(&(ptr->name[0]), name);
|
||
ptr->command = proc;
|
||
ptr->nextPtr = list;
|
||
Tcl_SetAssocData(interp, "photoOption", PhotoOptionCleanupProc,
|
||
(ClientData) ptr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TkPostscriptPhoto --
|
||
*
|
||
* This function is called to output the contents of a photo image in
|
||
* Postscript by calling the Tk_PostscriptPhoto function.
|
||
*
|
||
* Results:
|
||
* Returns a standard Tcl return value.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoPostscript(
|
||
ClientData clientData, /* Handle for the photo image. */
|
||
Tcl_Interp *interp, /* Interpreter. */
|
||
Tk_Window tkwin, /* (unused) */
|
||
Tk_PostscriptInfo psInfo, /* Postscript info. */
|
||
int x, int y, /* First pixel to output. */
|
||
int width, int height, /* Width and height of area. */
|
||
int prepass) /* (unused) */
|
||
{
|
||
Tk_PhotoImageBlock block;
|
||
|
||
Tk_PhotoGetImage((Tk_PhotoHandle) clientData, &block);
|
||
block.pixelPtr += y * block.pitch + x * block.pixelSize;
|
||
|
||
return Tk_PostscriptPhoto(interp, &block, psInfo, width, height);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoPutBlock_NoComposite, Tk_PhotoPutZoomedBlock_NoComposite --
|
||
*
|
||
* These backward-compatability functions just exist to fill slots in stubs
|
||
* table. For the behaviour of *_NoComposite, refer to the corresponding
|
||
* function without the extra suffix, except that the compositing rule is
|
||
* always "overlay" and the function always panics on memory-allocation
|
||
* failure.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoPutBlock_NoComposite(
|
||
Tk_PhotoHandle handle,
|
||
Tk_PhotoImageBlock *blockPtr,
|
||
int x, int y, int width, int height)
|
||
{
|
||
if (Tk_PhotoPutBlock(NULL, handle, blockPtr, x, y, width, height,
|
||
TK_PHOTO_COMPOSITE_OVERLAY) != TCL_OK) {
|
||
Tcl_Panic(TK_PHOTO_ALLOC_FAILURE_MESSAGE);
|
||
}
|
||
}
|
||
|
||
void
|
||
Tk_PhotoPutZoomedBlock_NoComposite(
|
||
Tk_PhotoHandle handle,
|
||
Tk_PhotoImageBlock *blockPtr,
|
||
int x, int y, int width, int height,
|
||
int zoomX, int zoomY, int subsampleX, int subsampleY)
|
||
{
|
||
if (Tk_PhotoPutZoomedBlock(NULL, handle, blockPtr, x, y, width, height,
|
||
zoomX, zoomY, subsampleX, subsampleY,
|
||
TK_PHOTO_COMPOSITE_OVERLAY) != TCL_OK) {
|
||
Tcl_Panic(TK_PHOTO_ALLOC_FAILURE_MESSAGE);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoExpand_Panic, Tk_PhotoPutBlock_Panic,
|
||
* Tk_PhotoPutZoomedBlock_Panic, Tk_PhotoSetSize_Panic
|
||
*
|
||
* Backward compatability functions for preserving the old behaviour (i.e.
|
||
* panic on memory allocation failure) so that extensions do not need to be
|
||
* significantly updated to take account of TIP #116. These call the new
|
||
* interface (i.e. the interface without the extra suffix), but panic if an
|
||
* error condition is returned.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoExpand_Panic(
|
||
Tk_PhotoHandle handle,
|
||
int width, int height)
|
||
{
|
||
if (Tk_PhotoExpand(NULL, handle, width, height) != TCL_OK) {
|
||
Tcl_Panic(TK_PHOTO_ALLOC_FAILURE_MESSAGE);
|
||
}
|
||
}
|
||
|
||
void
|
||
Tk_PhotoPutBlock_Panic(
|
||
Tk_PhotoHandle handle,
|
||
Tk_PhotoImageBlock *blockPtr,
|
||
int x, int y, int width, int height, int compRule)
|
||
{
|
||
if (Tk_PhotoPutBlock(NULL, handle, blockPtr, x, y, width, height,
|
||
compRule) != TCL_OK) {
|
||
Tcl_Panic(TK_PHOTO_ALLOC_FAILURE_MESSAGE);
|
||
}
|
||
}
|
||
|
||
void
|
||
Tk_PhotoPutZoomedBlock_Panic(
|
||
Tk_PhotoHandle handle, Tk_PhotoImageBlock *blockPtr,
|
||
int x, int y, int width, int height,
|
||
int zoomX, int zoomY, int subsampleX, int subsampleY,
|
||
int compRule)
|
||
{
|
||
if (Tk_PhotoPutZoomedBlock(NULL, handle, blockPtr, x, y, width, height,
|
||
zoomX, zoomY, subsampleX, subsampleY, compRule) != TCL_OK) {
|
||
Tcl_Panic(TK_PHOTO_ALLOC_FAILURE_MESSAGE);
|
||
}
|
||
}
|
||
|
||
void
|
||
Tk_PhotoSetSize_Panic(
|
||
Tk_PhotoHandle handle,
|
||
int width, int height)
|
||
{
|
||
if (Tk_PhotoSetSize(NULL, handle, width, height) != TCL_OK) {
|
||
Tcl_Panic(TK_PHOTO_ALLOC_FAILURE_MESSAGE);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|