1783 lines
50 KiB
C
1783 lines
50 KiB
C
/*
|
||
* tkCanvPs.c --
|
||
*
|
||
* This module provides Postscript output support for canvases, including
|
||
* the "postscript" widget command plus a few utility functions used for
|
||
* generating Postscript.
|
||
*
|
||
* Copyright (c) 1991-1994 The Regents of the University of California.
|
||
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
|
||
*
|
||
* See the file "license.terms" for information on usage and redistribution of
|
||
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
*/
|
||
|
||
#include "tkInt.h"
|
||
#include "tkCanvas.h"
|
||
#include "tkFont.h"
|
||
|
||
/*
|
||
* See tkCanvas.h for key data structures used to implement canvases.
|
||
*/
|
||
|
||
/*
|
||
* The following definition is used in generating postscript for images and
|
||
* windows.
|
||
*/
|
||
|
||
typedef struct TkColormapData { /* Hold color information for a window */
|
||
int separated; /* Whether to use separate color bands */
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||
int color; /* Whether window is color or black/white */
|
||
int ncolors; /* Number of color values stored */
|
||
XColor *colors; /* Pixel value -> RGB mappings */
|
||
int red_mask, green_mask, blue_mask; /* Masks and shifts for each */
|
||
int red_shift, green_shift, blue_shift; /* color band */
|
||
} TkColormapData;
|
||
|
||
/*
|
||
* One of the following structures is created to keep track of Postscript
|
||
* output being generated. It consists mostly of information provided on the
|
||
* widget command line.
|
||
*/
|
||
|
||
typedef struct TkPostscriptInfo {
|
||
int x, y, width, height; /* Area to print, in canvas pixel
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||
* coordinates. */
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||
int x2, y2; /* x+width and y+height. */
|
||
char *pageXString; /* String value of "-pagex" option or NULL. */
|
||
char *pageYString; /* String value of "-pagey" option or NULL. */
|
||
double pageX, pageY; /* Postscript coordinates (in points)
|
||
* corresponding to pageXString and
|
||
* pageYString. Don't forget that y-values
|
||
* grow upwards for Postscript! */
|
||
char *pageWidthString; /* Printed width of output. */
|
||
char *pageHeightString; /* Printed height of output. */
|
||
double scale; /* Scale factor for conversion: each pixel
|
||
* maps into this many points. */
|
||
Tk_Anchor pageAnchor; /* How to anchor bbox on Postscript page. */
|
||
int rotate; /* Non-zero means output should be rotated on
|
||
* page (landscape mode). */
|
||
char *fontVar; /* If non-NULL, gives name of global variable
|
||
* containing font mapping information.
|
||
* Malloc'ed. */
|
||
char *colorVar; /* If non-NULL, give name of global variable
|
||
* containing color mapping information.
|
||
* Malloc'ed. */
|
||
char *colorMode; /* Mode for handling colors: "monochrome",
|
||
* "gray", or "color". Malloc'ed. */
|
||
int colorLevel; /* Numeric value corresponding to colorMode: 0
|
||
* for mono, 1 for gray, 2 for color. */
|
||
char *fileName; /* Name of file in which to write Postscript;
|
||
* NULL means return Postscript info as
|
||
* result. Malloc'ed. */
|
||
char *channelName; /* If -channel is specified, the name of the
|
||
* channel to use. */
|
||
Tcl_Channel chan; /* Open channel corresponding to fileName. */
|
||
Tcl_HashTable fontTable; /* Hash table containing names of all font
|
||
* families used in output. The hash table
|
||
* values are not used. */
|
||
int prepass; /* Non-zero means that we're currently in the
|
||
* pre-pass that collects font information, so
|
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* the Postscript generated isn't relevant. */
|
||
int prolog; /* Non-zero means output should contain the
|
||
* standard prolog in the header. Generated in
|
||
* library/mkpsenc.tcl, stored in the variable
|
||
* ::tk::ps_preamable [sic]. */
|
||
Tk_Window tkwin; /* Window to get font pixel/point transform
|
||
* from. */
|
||
} TkPostscriptInfo;
|
||
|
||
/*
|
||
* The table below provides a template that's used to process arguments to the
|
||
* canvas "postscript" command and fill in TkPostscriptInfo structures.
|
||
*/
|
||
|
||
static const Tk_ConfigSpec configSpecs[] = {
|
||
{TK_CONFIG_STRING, "-colormap", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, colorVar), 0, NULL},
|
||
{TK_CONFIG_STRING, "-colormode", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, colorMode), 0, NULL},
|
||
{TK_CONFIG_STRING, "-file", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, fileName), 0, NULL},
|
||
{TK_CONFIG_STRING, "-channel", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, channelName), 0, NULL},
|
||
{TK_CONFIG_STRING, "-fontmap", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, fontVar), 0, NULL},
|
||
{TK_CONFIG_PIXELS, "-height", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, height), 0, NULL},
|
||
{TK_CONFIG_ANCHOR, "-pageanchor", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, pageAnchor), 0, NULL},
|
||
{TK_CONFIG_STRING, "-pageheight", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, pageHeightString), 0, NULL},
|
||
{TK_CONFIG_STRING, "-pagewidth", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, pageWidthString), 0, NULL},
|
||
{TK_CONFIG_STRING, "-pagex", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, pageXString), 0, NULL},
|
||
{TK_CONFIG_STRING, "-pagey", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, pageYString), 0, NULL},
|
||
{TK_CONFIG_BOOLEAN, "-prolog", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, prolog), 0, NULL},
|
||
{TK_CONFIG_BOOLEAN, "-rotate", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, rotate), 0, NULL},
|
||
{TK_CONFIG_PIXELS, "-width", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, width), 0, NULL},
|
||
{TK_CONFIG_PIXELS, "-x", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, x), 0, NULL},
|
||
{TK_CONFIG_PIXELS, "-y", NULL, NULL,
|
||
"", Tk_Offset(TkPostscriptInfo, y), 0, NULL},
|
||
{TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL}
|
||
};
|
||
|
||
/*
|
||
* Forward declarations for functions defined later in this file:
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||
*/
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||
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static int GetPostscriptPoints(Tcl_Interp *interp,
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char *string, double *doublePtr);
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static void PostscriptBitmap(Tk_Window tkwin, Pixmap bitmap,
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int startX, int startY, int width, int height,
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Tcl_Obj *psObj);
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static inline Tcl_Obj * GetPostscriptBuffer(Tcl_Interp *interp);
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||
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/*
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||
*--------------------------------------------------------------
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||
*
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||
* TkCanvPostscriptCmd --
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||
*
|
||
* This function is invoked to process the "postscript" options of the
|
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* widget command for canvas widgets. See the user documentation for
|
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* details on what it does.
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||
*
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||
* Results:
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||
* A standard Tcl result.
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||
*
|
||
* Side effects:
|
||
* See the user documentation.
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*
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||
*--------------------------------------------------------------
|
||
*/
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/* ARGSUSED */
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int
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||
TkCanvPostscriptCmd(
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||
TkCanvas *canvasPtr, /* Information about canvas widget. */
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Tcl_Interp *interp, /* Current interpreter. */
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int argc, /* Number of arguments. */
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const char **argv) /* Argument strings. Caller has already parsed
|
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* this command enough to know that argv[1] is
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* "postscript". */
|
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{
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||
TkPostscriptInfo psInfo, *psInfoPtr = &psInfo;
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||
Tk_PostscriptInfo oldInfoPtr;
|
||
int result;
|
||
Tk_Item *itemPtr;
|
||
#define STRING_LENGTH 400
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const char *p;
|
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time_t now;
|
||
size_t length;
|
||
Tk_Window tkwin = canvasPtr->tkwin;
|
||
Tcl_HashSearch search;
|
||
Tcl_HashEntry *hPtr;
|
||
Tcl_DString buffer;
|
||
Tcl_Obj *preambleObj;
|
||
Tcl_Obj *psObj;
|
||
int deltaX = 0, deltaY = 0; /* Offset of lower-left corner of area to be
|
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* marked up, measured in canvas units from
|
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* the positioning point on the page (reflects
|
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* anchor position). Initial values needed
|
||
* only to stop compiler warnings. */
|
||
|
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/*
|
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* Get the generic preamble. We only ever bother with the ASCII encoding;
|
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* the others just make life too complicated and never actually worked as
|
||
* such.
|
||
*/
|
||
|
||
result = Tcl_EvalEx(interp, "::tk::ensure_psenc_is_loaded", -1, TCL_EVAL_GLOBAL);
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||
if (result != TCL_OK) {
|
||
return result;
|
||
}
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||
preambleObj = Tcl_GetVar2Ex(interp, "::tk::ps_preamble", NULL,
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TCL_LEAVE_ERR_MSG);
|
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if (preambleObj == NULL) {
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return TCL_ERROR;
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}
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Tcl_IncrRefCount(preambleObj);
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Tcl_ResetResult(interp);
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psObj = Tcl_NewObj();
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||
|
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/*
|
||
* Initialize the data structure describing Postscript generation, then
|
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* process all the arguments to fill the data structure in.
|
||
*/
|
||
|
||
oldInfoPtr = canvasPtr->psInfo;
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canvasPtr->psInfo = (Tk_PostscriptInfo) psInfoPtr;
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||
psInfo.x = canvasPtr->xOrigin;
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||
psInfo.y = canvasPtr->yOrigin;
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||
psInfo.width = -1;
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||
psInfo.height = -1;
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||
psInfo.pageXString = NULL;
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||
psInfo.pageYString = NULL;
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psInfo.pageX = 72*4.25;
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psInfo.pageY = 72*5.5;
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psInfo.pageWidthString = NULL;
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||
psInfo.pageHeightString = NULL;
|
||
psInfo.scale = 1.0;
|
||
psInfo.pageAnchor = TK_ANCHOR_CENTER;
|
||
psInfo.rotate = 0;
|
||
psInfo.fontVar = NULL;
|
||
psInfo.colorVar = NULL;
|
||
psInfo.colorMode = NULL;
|
||
psInfo.colorLevel = 0;
|
||
psInfo.fileName = NULL;
|
||
psInfo.channelName = NULL;
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||
psInfo.chan = NULL;
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||
psInfo.prepass = 0;
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||
psInfo.prolog = 1;
|
||
psInfo.tkwin = tkwin;
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Tcl_InitHashTable(&psInfo.fontTable, TCL_STRING_KEYS);
|
||
result = Tk_ConfigureWidget(interp, tkwin, configSpecs, argc-2, argv+2,
|
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(char *) &psInfo, TK_CONFIG_ARGV_ONLY);
|
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if (result != TCL_OK) {
|
||
goto cleanup;
|
||
}
|
||
|
||
if (psInfo.width == -1) {
|
||
psInfo.width = Tk_Width(tkwin);
|
||
}
|
||
if (psInfo.height == -1) {
|
||
psInfo.height = Tk_Height(tkwin);
|
||
}
|
||
psInfo.x2 = psInfo.x + psInfo.width;
|
||
psInfo.y2 = psInfo.y + psInfo.height;
|
||
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if (psInfo.pageXString != NULL) {
|
||
if (GetPostscriptPoints(interp, psInfo.pageXString,
|
||
&psInfo.pageX) != TCL_OK) {
|
||
goto cleanup;
|
||
}
|
||
}
|
||
if (psInfo.pageYString != NULL) {
|
||
if (GetPostscriptPoints(interp, psInfo.pageYString,
|
||
&psInfo.pageY) != TCL_OK) {
|
||
goto cleanup;
|
||
}
|
||
}
|
||
if (psInfo.pageWidthString != NULL) {
|
||
if (GetPostscriptPoints(interp, psInfo.pageWidthString,
|
||
&psInfo.scale) != TCL_OK) {
|
||
goto cleanup;
|
||
}
|
||
psInfo.scale /= psInfo.width;
|
||
} else if (psInfo.pageHeightString != NULL) {
|
||
if (GetPostscriptPoints(interp, psInfo.pageHeightString,
|
||
&psInfo.scale) != TCL_OK) {
|
||
goto cleanup;
|
||
}
|
||
psInfo.scale /= psInfo.height;
|
||
} else {
|
||
psInfo.scale = (72.0/25.4)*WidthMMOfScreen(Tk_Screen(tkwin));
|
||
psInfo.scale /= WidthOfScreen(Tk_Screen(tkwin));
|
||
}
|
||
switch (psInfo.pageAnchor) {
|
||
case TK_ANCHOR_NW:
|
||
case TK_ANCHOR_W:
|
||
case TK_ANCHOR_SW:
|
||
deltaX = 0;
|
||
break;
|
||
case TK_ANCHOR_N:
|
||
case TK_ANCHOR_CENTER:
|
||
case TK_ANCHOR_S:
|
||
deltaX = -psInfo.width/2;
|
||
break;
|
||
case TK_ANCHOR_NE:
|
||
case TK_ANCHOR_E:
|
||
case TK_ANCHOR_SE:
|
||
deltaX = -psInfo.width;
|
||
break;
|
||
}
|
||
switch (psInfo.pageAnchor) {
|
||
case TK_ANCHOR_NW:
|
||
case TK_ANCHOR_N:
|
||
case TK_ANCHOR_NE:
|
||
deltaY = - psInfo.height;
|
||
break;
|
||
case TK_ANCHOR_W:
|
||
case TK_ANCHOR_CENTER:
|
||
case TK_ANCHOR_E:
|
||
deltaY = -psInfo.height/2;
|
||
break;
|
||
case TK_ANCHOR_SW:
|
||
case TK_ANCHOR_S:
|
||
case TK_ANCHOR_SE:
|
||
deltaY = 0;
|
||
break;
|
||
}
|
||
|
||
if (psInfo.colorMode == NULL) {
|
||
psInfo.colorLevel = 2;
|
||
} else {
|
||
length = strlen(psInfo.colorMode);
|
||
if (strncmp(psInfo.colorMode, "monochrome", length) == 0) {
|
||
psInfo.colorLevel = 0;
|
||
} else if (strncmp(psInfo.colorMode, "gray", length) == 0) {
|
||
psInfo.colorLevel = 1;
|
||
} else if (strncmp(psInfo.colorMode, "color", length) == 0) {
|
||
psInfo.colorLevel = 2;
|
||
} else {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"bad color mode \"%s\": must be monochrome, gray, or color",
|
||
psInfo.colorMode));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "COLORMODE", NULL);
|
||
result = TCL_ERROR;
|
||
goto cleanup;
|
||
}
|
||
}
|
||
|
||
if (psInfo.fileName != NULL) {
|
||
/*
|
||
* Check that -file and -channel are not both specified.
|
||
*/
|
||
|
||
if (psInfo.channelName != NULL) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"can't specify both -file and -channel", -1));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "USAGE", NULL);
|
||
result = TCL_ERROR;
|
||
goto cleanup;
|
||
}
|
||
|
||
/*
|
||
* Check that we are not in a safe interpreter. If we are, disallow
|
||
* the -file specification.
|
||
*/
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"can't specify -file in a safe interpreter", -1));
|
||
Tcl_SetErrorCode(interp, "TK", "SAFE", "PS_FILE", NULL);
|
||
result = TCL_ERROR;
|
||
goto cleanup;
|
||
}
|
||
|
||
p = Tcl_TranslateFileName(interp, psInfo.fileName, &buffer);
|
||
if (p == NULL) {
|
||
goto cleanup;
|
||
}
|
||
psInfo.chan = Tcl_OpenFileChannel(interp, p, "w", 0666);
|
||
Tcl_DStringFree(&buffer);
|
||
if (psInfo.chan == NULL) {
|
||
goto cleanup;
|
||
}
|
||
}
|
||
|
||
if (psInfo.channelName != NULL) {
|
||
int mode;
|
||
|
||
/*
|
||
* Check that the channel is found in this interpreter and that it is
|
||
* open for writing.
|
||
*/
|
||
|
||
psInfo.chan = Tcl_GetChannel(interp, psInfo.channelName, &mode);
|
||
if (psInfo.chan == NULL) {
|
||
result = TCL_ERROR;
|
||
goto cleanup;
|
||
}
|
||
if (!(mode & TCL_WRITABLE)) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"channel \"%s\" wasn't opened for writing",
|
||
psInfo.channelName));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "UNWRITABLE",NULL);
|
||
result = TCL_ERROR;
|
||
goto cleanup;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Make a pre-pass over all of the items, generating Postscript and then
|
||
* throwing it away. The purpose of this pass is just to collect
|
||
* information about all the fonts in use, so that we can output font
|
||
* information in the proper form required by the Document Structuring
|
||
* Conventions.
|
||
*/
|
||
|
||
psInfo.prepass = 1;
|
||
for (itemPtr = canvasPtr->firstItemPtr; itemPtr != NULL;
|
||
itemPtr = itemPtr->nextPtr) {
|
||
if ((itemPtr->x1 >= psInfo.x2) || (itemPtr->x2 < psInfo.x)
|
||
|| (itemPtr->y1 >= psInfo.y2) || (itemPtr->y2 < psInfo.y)) {
|
||
continue;
|
||
}
|
||
if (itemPtr->typePtr->postscriptProc == NULL) {
|
||
continue;
|
||
}
|
||
result = itemPtr->typePtr->postscriptProc(interp,
|
||
(Tk_Canvas) canvasPtr, itemPtr, 1);
|
||
Tcl_ResetResult(interp);
|
||
if (result != TCL_OK) {
|
||
/*
|
||
* An error just occurred. Just skip out of this loop. There's no
|
||
* need to report the error now; it can be reported later (errors
|
||
* can happen later that don't happen now, so we still have to
|
||
* check for errors later anyway).
|
||
*/
|
||
|
||
break;
|
||
}
|
||
}
|
||
psInfo.prepass = 0;
|
||
|
||
/*
|
||
* Generate the header and prolog for the Postscript.
|
||
*/
|
||
|
||
if (psInfo.prolog) {
|
||
Tcl_AppendToObj(psObj,
|
||
"%!PS-Adobe-3.0 EPSF-3.0\n"
|
||
"%%Creator: Tk Canvas Widget\n", -1);
|
||
|
||
#ifdef HAVE_PW_GECOS
|
||
if (!Tcl_IsSafe(interp)) {
|
||
struct passwd *pwPtr = getpwuid(getuid()); /* INTL: Native. */
|
||
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%For: %s\n", (pwPtr ? pwPtr->pw_gecos : "Unknown"));
|
||
endpwent();
|
||
}
|
||
#endif /* HAVE_PW_GECOS */
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%Title: Window %s\n", Tk_PathName(tkwin));
|
||
time(&now);
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%CreationDate: %s", ctime(&now)); /* INTL: Native. */
|
||
if (!psInfo.rotate) {
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%BoundingBox: %d %d %d %d\n",
|
||
(int) (psInfo.pageX + psInfo.scale*deltaX),
|
||
(int) (psInfo.pageY + psInfo.scale*deltaY),
|
||
(int) (psInfo.pageX + psInfo.scale*(deltaX + psInfo.width)
|
||
+ 1.0),
|
||
(int) (psInfo.pageY + psInfo.scale*(deltaY + psInfo.height)
|
||
+ 1.0));
|
||
} else {
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%BoundingBox: %d %d %d %d\n",
|
||
(int) (psInfo.pageX - psInfo.scale*(deltaY+psInfo.height)),
|
||
(int) (psInfo.pageY + psInfo.scale*deltaX),
|
||
(int) (psInfo.pageX - psInfo.scale*deltaY + 1.0),
|
||
(int) (psInfo.pageY + psInfo.scale*(deltaX + psInfo.width)
|
||
+ 1.0));
|
||
}
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%Pages: 1\n"
|
||
"%%%%DocumentData: Clean7Bit\n"
|
||
"%%%%Orientation: %s\n",
|
||
psInfo.rotate ? "Landscape" : "Portrait");
|
||
p = "%%%%DocumentNeededResources: font %s\n";
|
||
for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
|
||
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
|
||
Tcl_AppendPrintfToObj(psObj, p,
|
||
Tcl_GetHashKey(&psInfo.fontTable, hPtr));
|
||
p = "%%%%+ font %s\n";
|
||
}
|
||
Tcl_AppendToObj(psObj, "%%EndComments\n\n", -1);
|
||
|
||
/*
|
||
* Insert the prolog
|
||
*/
|
||
|
||
Tcl_AppendObjToObj(psObj, preambleObj);
|
||
|
||
if (psInfo.chan != NULL) {
|
||
if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
|
||
channelWriteFailed:
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"problem writing postscript data to channel: %s",
|
||
Tcl_PosixError(interp)));
|
||
result = TCL_ERROR;
|
||
goto cleanup;
|
||
}
|
||
Tcl_DecrRefCount(psObj);
|
||
psObj = Tcl_NewObj();
|
||
}
|
||
|
||
/*
|
||
* Document setup: set the color level and include fonts.
|
||
*/
|
||
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%BeginSetup\n/CL %d def\n", psInfo.colorLevel);
|
||
for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
|
||
hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%%%%IncludeResource: font %s\n",
|
||
(char *) Tcl_GetHashKey(&psInfo.fontTable, hPtr));
|
||
}
|
||
Tcl_AppendToObj(psObj, "%%EndSetup\n\n", -1);
|
||
|
||
/*
|
||
* Page setup: move to page positioning point, rotate if needed, set
|
||
* scale factor, offset for proper anchor position, and set clip
|
||
* region.
|
||
*/
|
||
|
||
Tcl_AppendToObj(psObj, "%%Page: 1 1\nsave\n", -1);
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%.1f %.1f translate\n", psInfo.pageX, psInfo.pageY);
|
||
if (psInfo.rotate) {
|
||
Tcl_AppendToObj(psObj, "90 rotate\n", -1);
|
||
}
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%.4g %.4g scale\n", psInfo.scale, psInfo.scale);
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%d %d translate\n", deltaX - psInfo.x, deltaY);
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"%d %.15g moveto %d %.15g lineto %d %.15g lineto %d %.15g "
|
||
"lineto closepath clip newpath\n",
|
||
psInfo.x, Tk_PostscriptY((double)psInfo.y,
|
||
(Tk_PostscriptInfo)psInfoPtr),
|
||
psInfo.x2, Tk_PostscriptY((double)psInfo.y,
|
||
(Tk_PostscriptInfo)psInfoPtr),
|
||
psInfo.x2, Tk_PostscriptY((double)psInfo.y2,
|
||
(Tk_PostscriptInfo)psInfoPtr),
|
||
psInfo.x, Tk_PostscriptY((double)psInfo.y2,
|
||
(Tk_PostscriptInfo)psInfoPtr));
|
||
if (psInfo.chan != NULL) {
|
||
if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
|
||
goto channelWriteFailed;
|
||
}
|
||
Tcl_DecrRefCount(psObj);
|
||
psObj = Tcl_NewObj();
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Iterate through all the items, having each relevant one draw itself.
|
||
* Quit if any of the items returns an error.
|
||
*/
|
||
|
||
result = TCL_OK;
|
||
for (itemPtr = canvasPtr->firstItemPtr; itemPtr != NULL;
|
||
itemPtr = itemPtr->nextPtr) {
|
||
if ((itemPtr->x1 >= psInfo.x2) || (itemPtr->x2 < psInfo.x)
|
||
|| (itemPtr->y1 >= psInfo.y2) || (itemPtr->y2 < psInfo.y)) {
|
||
continue;
|
||
}
|
||
if (itemPtr->typePtr->postscriptProc == NULL) {
|
||
continue;
|
||
}
|
||
if (itemPtr->state == TK_STATE_HIDDEN) {
|
||
continue;
|
||
}
|
||
|
||
result = itemPtr->typePtr->postscriptProc(interp,
|
||
(Tk_Canvas) canvasPtr, itemPtr, 0);
|
||
if (result != TCL_OK) {
|
||
Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf(
|
||
"\n (generating Postscript for item %d)",
|
||
itemPtr->id));
|
||
goto cleanup;
|
||
}
|
||
|
||
Tcl_AppendToObj(psObj, "gsave\n", -1);
|
||
Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
|
||
Tcl_AppendToObj(psObj, "grestore\n", -1);
|
||
Tcl_ResetResult(interp);
|
||
|
||
if (psInfo.chan != NULL) {
|
||
if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
|
||
goto channelWriteFailed;
|
||
}
|
||
Tcl_DecrRefCount(psObj);
|
||
psObj = Tcl_NewObj();
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Output page-end information, such as commands to print the page and
|
||
* document trailer stuff.
|
||
*/
|
||
|
||
if (psInfo.prolog) {
|
||
Tcl_AppendToObj(psObj,
|
||
"restore showpage\n\n"
|
||
"%%Trailer\n"
|
||
"end\n"
|
||
"%%EOF\n", -1);
|
||
|
||
if (psInfo.chan != NULL) {
|
||
if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
|
||
goto channelWriteFailed;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (psInfo.chan == NULL) {
|
||
Tcl_SetObjResult(interp, psObj);
|
||
psObj = Tcl_NewObj();
|
||
}
|
||
|
||
/*
|
||
* Clean up psInfo to release malloc'ed stuff.
|
||
*/
|
||
|
||
cleanup:
|
||
if (psInfo.pageXString != NULL) {
|
||
ckfree(psInfo.pageXString);
|
||
}
|
||
if (psInfo.pageYString != NULL) {
|
||
ckfree(psInfo.pageYString);
|
||
}
|
||
if (psInfo.pageWidthString != NULL) {
|
||
ckfree(psInfo.pageWidthString);
|
||
}
|
||
if (psInfo.pageHeightString != NULL) {
|
||
ckfree(psInfo.pageHeightString);
|
||
}
|
||
if (psInfo.fontVar != NULL) {
|
||
ckfree(psInfo.fontVar);
|
||
}
|
||
if (psInfo.colorVar != NULL) {
|
||
ckfree(psInfo.colorVar);
|
||
}
|
||
if (psInfo.colorMode != NULL) {
|
||
ckfree(psInfo.colorMode);
|
||
}
|
||
if (psInfo.fileName != NULL) {
|
||
ckfree(psInfo.fileName);
|
||
}
|
||
if ((psInfo.chan != NULL) && (psInfo.channelName == NULL)) {
|
||
Tcl_Close(interp, psInfo.chan);
|
||
}
|
||
if (psInfo.channelName != NULL) {
|
||
ckfree(psInfo.channelName);
|
||
}
|
||
Tcl_DeleteHashTable(&psInfo.fontTable);
|
||
canvasPtr->psInfo = (Tk_PostscriptInfo) oldInfoPtr;
|
||
Tcl_DecrRefCount(preambleObj);
|
||
Tcl_DecrRefCount(psObj);
|
||
return result;
|
||
}
|
||
|
||
static inline Tcl_Obj *
|
||
GetPostscriptBuffer(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Tcl_Obj *psObj = Tcl_GetObjResult(interp);
|
||
|
||
if (Tcl_IsShared(psObj)) {
|
||
psObj = Tcl_DuplicateObj(psObj);
|
||
Tcl_SetObjResult(interp, psObj);
|
||
}
|
||
return psObj;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_PostscriptColor --
|
||
*
|
||
* This function is called by individual canvas items when they want to
|
||
* set a color value for output. Given information about an X color, this
|
||
* function will generate Postscript commands to set up an appropriate
|
||
* color in Postscript.
|
||
*
|
||
* Results:
|
||
* Returns a standard Tcl return value. If an error occurs then an error
|
||
* message will be left in the interp's result. If no error occurs, then
|
||
* additional Postscript will be appended to the interp's result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PostscriptColor(
|
||
Tcl_Interp *interp,
|
||
Tk_PostscriptInfo psInfo, /* Postscript info. */
|
||
XColor *colorPtr) /* Information about color. */
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
double red, green, blue;
|
||
|
||
if (psInfoPtr->prepass) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
* If there is a color map defined, then look up the color's name in the
|
||
* map and use the Postscript commands found there, if there are any.
|
||
*/
|
||
|
||
if (psInfoPtr->colorVar != NULL) {
|
||
const char *cmdString = Tcl_GetVar2(interp, psInfoPtr->colorVar,
|
||
Tk_NameOfColor(colorPtr), 0);
|
||
|
||
if (cmdString != NULL) {
|
||
Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
|
||
"%s\n", cmdString);
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* No color map entry for this color. Grab the color's intensities and
|
||
* output Postscript commands for them. Special note: X uses a range of
|
||
* 0-65535 for intensities, but most displays only use a range of 0-255,
|
||
* which maps to (0, 256, 512, ... 65280) in the X scale. This means that
|
||
* there's no way to get perfect white, since the highest intensity is
|
||
* only 65280 out of 65535. To work around this problem, rescale the X
|
||
* intensity to a 0-255 scale and use that as the basis for the Postscript
|
||
* colors. This scheme still won't work if the display only uses 4 bits
|
||
* per color, but most diplays use at least 8 bits.
|
||
*/
|
||
|
||
red = ((double) (((int) colorPtr->red) >> 8))/255.0;
|
||
green = ((double) (((int) colorPtr->green) >> 8))/255.0;
|
||
blue = ((double) (((int) colorPtr->blue) >> 8))/255.0;
|
||
Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
|
||
"%.3f %.3f %.3f setrgbcolor AdjustColor\n",
|
||
red, green, blue);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_PostscriptFont --
|
||
*
|
||
* This function is called by individual canvas items when they want to
|
||
* output text. Given information about an X font, this function will
|
||
* generate Postscript commands to set up an appropriate font in
|
||
* Postscript.
|
||
*
|
||
* Results:
|
||
* Returns a standard Tcl return value. If an error occurs then an error
|
||
* message will be left in the interp's result. If no error occurs, then
|
||
* additional Postscript will be appended to the interp's result.
|
||
*
|
||
* Side effects:
|
||
* The Postscript font name is entered into psInfoPtr->fontTable if it
|
||
* wasn't already there.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PostscriptFont(
|
||
Tcl_Interp *interp,
|
||
Tk_PostscriptInfo psInfo, /* Postscript Info. */
|
||
Tk_Font tkfont) /* Information about font in which text is to
|
||
* be printed. */
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
Tcl_DString ds;
|
||
int i, points;
|
||
const char *fontname;
|
||
|
||
/*
|
||
* First, look up the font's name in the font map, if there is one. If
|
||
* there is an entry for this font, it consists of a list containing font
|
||
* name and size. Use this information.
|
||
*/
|
||
|
||
if (psInfoPtr->fontVar != NULL) {
|
||
const char *name = Tk_NameOfFont(tkfont);
|
||
Tcl_Obj **objv;
|
||
int objc;
|
||
double size;
|
||
Tcl_Obj *list = Tcl_GetVar2Ex(interp, psInfoPtr->fontVar, name, 0);
|
||
|
||
if (list != NULL) {
|
||
if (Tcl_ListObjGetElements(interp, list, &objc, &objv) != TCL_OK
|
||
|| objc != 2
|
||
|| (fontname = Tcl_GetString(objv[0]))[0] == '\0'
|
||
|| strchr(fontname, ' ') != NULL
|
||
|| Tcl_GetDoubleFromObj(interp, objv[1], &size) != TCL_OK
|
||
|| size <= 0) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"bad font map entry for \"%s\": \"%s\"",
|
||
name, Tcl_GetString(list)));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "FONTMAP",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
|
||
"/%s findfont %d scalefont%s setfont\n",
|
||
fontname, (int) size,
|
||
strncasecmp(fontname, "Symbol", 7) ? " ISOEncode" : "");
|
||
Tcl_CreateHashEntry(&psInfoPtr->fontTable, fontname, &i);
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Nothing in the font map, so fall back to the old guessing technique.
|
||
*/
|
||
|
||
Tcl_DStringInit(&ds);
|
||
points = Tk_PostscriptFontName(tkfont, &ds);
|
||
fontname = Tcl_DStringValue(&ds);
|
||
Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
|
||
"/%s findfont %d scalefont%s setfont\n",
|
||
fontname, (int)(TkFontGetPoints(psInfoPtr->tkwin, points) + 0.5),
|
||
strncasecmp(fontname, "Symbol", 7) ? " ISOEncode" : "");
|
||
Tcl_CreateHashEntry(&psInfoPtr->fontTable, Tcl_DStringValue(&ds), &i);
|
||
Tcl_DStringFree(&ds);
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_PostscriptBitmap --
|
||
*
|
||
* This function is called to output the contents of a sub-region of a
|
||
* bitmap in proper image data format for Postscript (i.e. data between
|
||
* angle brackets, one bit per pixel).
|
||
*
|
||
* Results:
|
||
* Returns a standard Tcl return value. If an error occurs then an error
|
||
* message will be left in the interp's result. If no error occurs, then
|
||
* additional Postscript will be appended to the interp's result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PostscriptBitmap(
|
||
Tcl_Interp *interp,
|
||
Tk_Window tkwin,
|
||
Tk_PostscriptInfo psInfo, /* Postscript info. */
|
||
Pixmap bitmap, /* Bitmap for which to generate Postscript. */
|
||
int startX, int startY, /* Coordinates of upper-left corner of
|
||
* rectangular region to output. */
|
||
int width, int height) /* Height of rectangular region. */
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
|
||
if (psInfoPtr->prepass) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
PostscriptBitmap(tkwin, bitmap, startX, startY, width, height,
|
||
GetPostscriptBuffer(interp));
|
||
return TCL_OK;
|
||
}
|
||
|
||
static void
|
||
PostscriptBitmap(
|
||
Tk_Window tkwin,
|
||
Pixmap bitmap, /* Bitmap for which to generate Postscript. */
|
||
int startX, int startY, /* Coordinates of upper-left corner of
|
||
* rectangular region to output. */
|
||
int width, int height, /* Height of rectangular region. */
|
||
Tcl_Obj *psObj) /* Where to append the postscript. */
|
||
{
|
||
XImage *imagePtr;
|
||
int charsInLine, x, y, lastX, lastY, value, mask;
|
||
unsigned int totalWidth, totalHeight;
|
||
Window dummyRoot;
|
||
int dummyX, dummyY;
|
||
unsigned dummyBorderwidth, dummyDepth;
|
||
|
||
/*
|
||
* The following call should probably be a call to Tk_SizeOfBitmap
|
||
* instead, but it seems that we are occasionally invoked by custom item
|
||
* types that create their own bitmaps without registering them with Tk.
|
||
* XGetGeometry is a bit slower than Tk_SizeOfBitmap, but it shouldn't
|
||
* matter here.
|
||
*/
|
||
|
||
XGetGeometry(Tk_Display(tkwin), bitmap, &dummyRoot,
|
||
(int *) &dummyX, (int *) &dummyY, (unsigned int *) &totalWidth,
|
||
(unsigned int *) &totalHeight, &dummyBorderwidth, &dummyDepth);
|
||
imagePtr = XGetImage(Tk_Display(tkwin), bitmap, 0, 0,
|
||
totalWidth, totalHeight, 1, XYPixmap);
|
||
|
||
Tcl_AppendToObj(psObj, "<", -1);
|
||
mask = 0x80;
|
||
value = 0;
|
||
charsInLine = 0;
|
||
lastX = startX + width - 1;
|
||
lastY = startY + height - 1;
|
||
for (y = lastY; y >= startY; y--) {
|
||
for (x = startX; x <= lastX; x++) {
|
||
if (XGetPixel(imagePtr, x, y)) {
|
||
value |= mask;
|
||
}
|
||
mask >>= 1;
|
||
if (mask == 0) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02x", value);
|
||
mask = 0x80;
|
||
value = 0;
|
||
charsInLine += 2;
|
||
if (charsInLine >= 60) {
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
charsInLine = 0;
|
||
}
|
||
}
|
||
}
|
||
if (mask != 0x80) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02x", value);
|
||
mask = 0x80;
|
||
value = 0;
|
||
charsInLine += 2;
|
||
}
|
||
}
|
||
Tcl_AppendToObj(psObj, ">", -1);
|
||
|
||
XDestroyImage(imagePtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_PostscriptStipple --
|
||
*
|
||
* This function is called by individual canvas items when they have
|
||
* created a path that they'd like to be filled with a stipple pattern.
|
||
* Given information about an X bitmap, this function will generate
|
||
* Postscript commands to fill the current clip region using a stipple
|
||
* pattern defined by the bitmap.
|
||
*
|
||
* Results:
|
||
* Returns a standard Tcl return value. If an error occurs then an error
|
||
* message will be left in the interp's result. If no error occurs, then
|
||
* additional Postscript will be appended to the interp's result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PostscriptStipple(
|
||
Tcl_Interp *interp,
|
||
Tk_Window tkwin,
|
||
Tk_PostscriptInfo psInfo, /* Interpreter for returning Postscript or
|
||
* error message. */
|
||
Pixmap bitmap) /* Bitmap to use for stippling. */
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
int width, height;
|
||
Window dummyRoot;
|
||
int dummyX, dummyY;
|
||
unsigned dummyBorderwidth, dummyDepth;
|
||
Tcl_Obj *psObj;
|
||
|
||
if (psInfoPtr->prepass) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
* The following call should probably be a call to Tk_SizeOfBitmap
|
||
* instead, but it seems that we are occasionally invoked by custom item
|
||
* types that create their own bitmaps without registering them with Tk.
|
||
* XGetGeometry is a bit slower than Tk_SizeOfBitmap, but it shouldn't
|
||
* matter here.
|
||
*/
|
||
|
||
XGetGeometry(Tk_Display(tkwin), bitmap, &dummyRoot,
|
||
(int *) &dummyX, (int *) &dummyY, (unsigned *) &width,
|
||
(unsigned *) &height, &dummyBorderwidth, &dummyDepth);
|
||
|
||
psObj = GetPostscriptBuffer(interp);
|
||
Tcl_AppendPrintfToObj(psObj, "%d %d ", width, height);
|
||
PostscriptBitmap(tkwin, bitmap, 0, 0, width, height, psObj);
|
||
Tcl_AppendToObj(psObj, " StippleFill\n", -1);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_PostscriptY --
|
||
*
|
||
* Given a y-coordinate in local coordinates, this function returns a
|
||
* y-coordinate to use for Postscript output. Required because canvases
|
||
* have their origin in the top-left, but postscript pages have their
|
||
* origin in the bottom left.
|
||
*
|
||
* Results:
|
||
* Returns the Postscript coordinate that corresponds to "y".
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
double
|
||
Tk_PostscriptY(
|
||
double y, /* Y-coordinate in canvas coords. */
|
||
Tk_PostscriptInfo psInfo) /* Postscript info */
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
|
||
return psInfoPtr->y2 - y;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_PostscriptPath --
|
||
*
|
||
* Given an array of points for a path, generate Postscript commands to
|
||
* create the path.
|
||
*
|
||
* Results:
|
||
* Postscript commands get appended to what's in the interp's result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PostscriptPath(
|
||
Tcl_Interp *interp,
|
||
Tk_PostscriptInfo psInfo, /* Canvas on whose behalf Postscript is being
|
||
* generated. */
|
||
double *coordPtr, /* Pointer to first in array of 2*numPoints
|
||
* coordinates giving points for path. */
|
||
int numPoints) /* Number of points at *coordPtr. */
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
Tcl_Obj *psObj;
|
||
|
||
if (psInfoPtr->prepass) {
|
||
return;
|
||
}
|
||
|
||
psObj = GetPostscriptBuffer(interp);
|
||
Tcl_AppendPrintfToObj(psObj, "%.15g %.15g moveto\n",
|
||
coordPtr[0], Tk_PostscriptY(coordPtr[1], psInfo));
|
||
for (numPoints--, coordPtr += 2; numPoints > 0;
|
||
numPoints--, coordPtr += 2) {
|
||
Tcl_AppendPrintfToObj(psObj, "%.15g %.15g lineto\n",
|
||
coordPtr[0], Tk_PostscriptY(coordPtr[1], psInfo));
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* GetPostscriptPoints --
|
||
*
|
||
* Given a string, returns the number of Postscript points corresponding
|
||
* to that string.
|
||
*
|
||
* Results:
|
||
* The return value is a standard Tcl return result. If TCL_OK is
|
||
* returned, then everything went well and the screen distance is stored
|
||
* at *doublePtr; otherwise TCL_ERROR is returned and an error message is
|
||
* left in the interp's result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
GetPostscriptPoints(
|
||
Tcl_Interp *interp, /* Use this for error reporting. */
|
||
char *string, /* String describing a screen distance. */
|
||
double *doublePtr) /* Place to store converted result. */
|
||
{
|
||
char *end;
|
||
double d;
|
||
|
||
d = strtod(string, &end);
|
||
if (end == string) {
|
||
goto error;
|
||
}
|
||
while ((*end != '\0') && isspace(UCHAR(*end))) {
|
||
end++;
|
||
}
|
||
switch (*end) {
|
||
case 'c':
|
||
d *= 72.0/2.54;
|
||
end++;
|
||
break;
|
||
case 'i':
|
||
d *= 72.0;
|
||
end++;
|
||
break;
|
||
case 'm':
|
||
d *= 72.0/25.4;
|
||
end++;
|
||
break;
|
||
case 0:
|
||
break;
|
||
case 'p':
|
||
end++;
|
||
break;
|
||
default:
|
||
goto error;
|
||
}
|
||
while ((*end != '\0') && isspace(UCHAR(*end))) {
|
||
end++;
|
||
}
|
||
if (*end != 0) {
|
||
goto error;
|
||
}
|
||
*doublePtr = d;
|
||
return TCL_OK;
|
||
|
||
error:
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad distance \"%s\"", string));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "POINTS", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TkImageGetColor --
|
||
*
|
||
* This function converts a pixel value to three floating point numbers,
|
||
* representing the amount of red, green, and blue in that pixel on the
|
||
* screen. It makes use of colormap data passed as an argument, and
|
||
* should work for all Visual types.
|
||
*
|
||
* This implementation is bogus on Windows because the colormap data is
|
||
* never filled in. Instead all postscript generated data coming through
|
||
* here is expected to be RGB color data. To handle lower bit-depth
|
||
* images properly, XQueryColors must be implemented for Windows.
|
||
*
|
||
* Results:
|
||
* Returns red, green, and blue color values in the range 0 to 1. There
|
||
* are no error returns.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
#ifdef _WIN32
|
||
#include <windows.h>
|
||
|
||
/*
|
||
* We could just define these instead of pulling in windows.h.
|
||
#define GetRValue(rgb) ((BYTE)(rgb))
|
||
#define GetGValue(rgb) ((BYTE)(((WORD)(rgb)) >> 8))
|
||
#define GetBValue(rgb) ((BYTE)((rgb)>>16))
|
||
*/
|
||
|
||
#else /* !_WIN32 */
|
||
|
||
#define GetRValue(rgb) ((rgb & cdata->red_mask) >> cdata->red_shift)
|
||
#define GetGValue(rgb) ((rgb & cdata->green_mask) >> cdata->green_shift)
|
||
#define GetBValue(rgb) ((rgb & cdata->blue_mask) >> cdata->blue_shift)
|
||
|
||
#endif /* _WIN32 */
|
||
|
||
#if defined(_WIN32) || defined(MAC_OSX_TK)
|
||
static void
|
||
TkImageGetColor(
|
||
TkColormapData *cdata, /* Colormap data */
|
||
unsigned long pixel, /* Pixel value to look up */
|
||
double *red, double *green, double *blue)
|
||
/* Color data to return */
|
||
{
|
||
*red = (double) GetRValue(pixel) / 255.0;
|
||
*green = (double) GetGValue(pixel) / 255.0;
|
||
*blue = (double) GetBValue(pixel) / 255.0;
|
||
}
|
||
#else /* ! (_WIN32 || MAC_OSX_TK) */
|
||
static void
|
||
TkImageGetColor(
|
||
TkColormapData *cdata, /* Colormap data */
|
||
unsigned long pixel, /* Pixel value to look up */
|
||
double *red, double *green, double *blue)
|
||
/* Color data to return */
|
||
{
|
||
if (cdata->separated) {
|
||
int r = GetRValue(pixel);
|
||
int g = GetGValue(pixel);
|
||
int b = GetBValue(pixel);
|
||
|
||
*red = cdata->colors[r].red / 65535.0;
|
||
*green = cdata->colors[g].green / 65535.0;
|
||
*blue = cdata->colors[b].blue / 65535.0;
|
||
} else {
|
||
*red = cdata->colors[pixel].red / 65535.0;
|
||
*green = cdata->colors[pixel].green / 65535.0;
|
||
*blue = cdata->colors[pixel].blue / 65535.0;
|
||
}
|
||
}
|
||
#endif /* _WIN32 || MAC_OSX_TK */
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TkPostscriptImage --
|
||
*
|
||
* This function is called to output the contents of an image in
|
||
* Postscript, using a format appropriate for the current color mode
|
||
* (i.e. one bit per pixel in monochrome, one byte per pixel in gray, and
|
||
* three bytes per pixel in color).
|
||
*
|
||
* Results:
|
||
* Returns a standard Tcl return value. If an error occurs then an error
|
||
* message will be left in interp->result. If no error occurs, then
|
||
* additional Postscript will be appended to interp->result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TkPostscriptImage(
|
||
Tcl_Interp *interp,
|
||
Tk_Window tkwin,
|
||
Tk_PostscriptInfo psInfo, /* postscript info */
|
||
XImage *ximage, /* Image to draw */
|
||
int x, int y, /* First pixel to output */
|
||
int width, int height) /* Width and height of area */
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
int xx, yy, band, maxRows;
|
||
double red, green, blue;
|
||
int bytesPerLine = 0, maxWidth = 0;
|
||
int level = psInfoPtr->colorLevel;
|
||
Colormap cmap;
|
||
int i, ncolors;
|
||
Visual *visual;
|
||
TkColormapData cdata;
|
||
Tcl_Obj *psObj;
|
||
|
||
if (psInfoPtr->prepass) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
cmap = Tk_Colormap(tkwin);
|
||
visual = Tk_Visual(tkwin);
|
||
|
||
/*
|
||
* Obtain information about the colormap, ie the mapping between pixel
|
||
* values and RGB values. The code below should work for all Visual types.
|
||
*/
|
||
|
||
ncolors = visual->map_entries;
|
||
cdata.colors = ckalloc(sizeof(XColor) * ncolors);
|
||
cdata.ncolors = ncolors;
|
||
|
||
if (visual->c_class == DirectColor || visual->c_class == TrueColor) {
|
||
cdata.separated = 1;
|
||
cdata.red_mask = visual->red_mask;
|
||
cdata.green_mask = visual->green_mask;
|
||
cdata.blue_mask = visual->blue_mask;
|
||
cdata.red_shift = 0;
|
||
cdata.green_shift = 0;
|
||
cdata.blue_shift = 0;
|
||
|
||
while ((0x0001 & (cdata.red_mask >> cdata.red_shift)) == 0) {
|
||
cdata.red_shift ++;
|
||
}
|
||
while ((0x0001 & (cdata.green_mask >> cdata.green_shift)) == 0) {
|
||
cdata.green_shift ++;
|
||
}
|
||
while ((0x0001 & (cdata.blue_mask >> cdata.blue_shift)) == 0) {
|
||
cdata.blue_shift ++;
|
||
}
|
||
|
||
for (i = 0; i < ncolors; i ++) {
|
||
cdata.colors[i].pixel =
|
||
((i << cdata.red_shift) & cdata.red_mask) |
|
||
((i << cdata.green_shift) & cdata.green_mask) |
|
||
((i << cdata.blue_shift) & cdata.blue_mask);
|
||
}
|
||
} else {
|
||
cdata.separated=0;
|
||
for (i = 0; i < ncolors; i ++) {
|
||
cdata.colors[i].pixel = i;
|
||
}
|
||
}
|
||
|
||
if (visual->c_class == StaticGray || visual->c_class == GrayScale) {
|
||
cdata.color = 0;
|
||
} else {
|
||
cdata.color = 1;
|
||
}
|
||
|
||
XQueryColors(Tk_Display(tkwin), cmap, cdata.colors, ncolors);
|
||
|
||
/*
|
||
* Figure out which color level to use (possibly lower than the one
|
||
* specified by the user). For example, if the user specifies color with
|
||
* monochrome screen, use gray or monochrome mode instead.
|
||
*/
|
||
|
||
if (!cdata.color && level >= 2) {
|
||
level = 1;
|
||
}
|
||
|
||
if (!cdata.color && cdata.ncolors == 2) {
|
||
level = 0;
|
||
}
|
||
|
||
/*
|
||
* Check that at least one row of the image can be represented with a
|
||
* string less than 64 KB long (this is a limit in the Postscript
|
||
* interpreter).
|
||
*/
|
||
|
||
switch (level) {
|
||
case 0: bytesPerLine = (width + 7) / 8; maxWidth = 240000; break;
|
||
case 1: bytesPerLine = width; maxWidth = 60000; break;
|
||
default: bytesPerLine = 3 * width; maxWidth = 20000; break;
|
||
}
|
||
|
||
if (bytesPerLine > 60000) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"can't generate Postscript for images more than %d pixels wide",
|
||
maxWidth));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "MEMLIMIT", NULL);
|
||
ckfree(cdata.colors);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
maxRows = 60000 / bytesPerLine;
|
||
psObj = GetPostscriptBuffer(interp);
|
||
|
||
for (band = height-1; band >= 0; band -= maxRows) {
|
||
int rows = (band >= maxRows) ? maxRows : band + 1;
|
||
int lineLen = 0;
|
||
|
||
switch (level) {
|
||
case 0:
|
||
Tcl_AppendPrintfToObj(psObj, "%d %d 1 matrix {\n<", width, rows);
|
||
break;
|
||
case 1:
|
||
Tcl_AppendPrintfToObj(psObj, "%d %d 8 matrix {\n<", width, rows);
|
||
break;
|
||
default:
|
||
Tcl_AppendPrintfToObj(psObj, "%d %d 8 matrix {\n<", width, rows);
|
||
break;
|
||
}
|
||
for (yy = band; yy > band - rows; yy--) {
|
||
switch (level) {
|
||
case 0: {
|
||
/*
|
||
* Generate data for image in monochrome mode. No attempt at
|
||
* dithering is made--instead, just set a threshold.
|
||
*/
|
||
|
||
unsigned char mask = 0x80;
|
||
unsigned char data = 0x00;
|
||
|
||
for (xx = x; xx< x+width; xx++) {
|
||
TkImageGetColor(&cdata, XGetPixel(ximage, xx, yy),
|
||
&red, &green, &blue);
|
||
if (0.30 * red + 0.59 * green + 0.11 * blue > 0.5) {
|
||
data |= mask;
|
||
}
|
||
mask >>= 1;
|
||
if (mask == 0) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", data);
|
||
lineLen += 2;
|
||
if (lineLen > 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
mask = 0x80;
|
||
data = 0x00;
|
||
}
|
||
}
|
||
if ((width % 8) != 0) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", data);
|
||
mask = 0x80;
|
||
data = 0x00;
|
||
}
|
||
break;
|
||
}
|
||
case 1:
|
||
/*
|
||
* Generate data in gray mode; in this case, take a weighted
|
||
* sum of the red, green, and blue values.
|
||
*/
|
||
|
||
for (xx = x; xx < x+width; xx ++) {
|
||
TkImageGetColor(&cdata, XGetPixel(ximage, xx, yy),
|
||
&red, &green, &blue);
|
||
Tcl_AppendPrintfToObj(psObj, "%02X",
|
||
(int) floor(0.5 + 255.0 *
|
||
(0.30 * red + 0.59 * green + 0.11 * blue)));
|
||
lineLen += 2;
|
||
if (lineLen > 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
/*
|
||
* Finally, color mode. Here, just output the red, green, and
|
||
* blue values directly.
|
||
*/
|
||
|
||
for (xx = x; xx < x+width; xx++) {
|
||
TkImageGetColor(&cdata, XGetPixel(ximage, xx, yy),
|
||
&red, &green, &blue);
|
||
Tcl_AppendPrintfToObj(psObj, "%02X%02X%02X",
|
||
(int) floor(0.5 + 255.0 * red),
|
||
(int) floor(0.5 + 255.0 * green),
|
||
(int) floor(0.5 + 255.0 * blue));
|
||
lineLen += 6;
|
||
if (lineLen > 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
switch (level) {
|
||
case 0: case 1:
|
||
Tcl_AppendToObj(psObj, ">\n} image\n", -1); break;
|
||
default:
|
||
Tcl_AppendToObj(psObj, ">\n} false 3 colorimage\n", -1); break;
|
||
}
|
||
Tcl_AppendPrintfToObj(psObj, "0 %d translate\n", rows);
|
||
}
|
||
ckfree(cdata.colors);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_PostscriptPhoto --
|
||
*
|
||
* This function is called to output the contents of a photo image in
|
||
* Postscript, using a format appropriate for the requested postscript
|
||
* color mode (i.e. one byte per pixel in gray, and three bytes per pixel
|
||
* in color).
|
||
*
|
||
* Results:
|
||
* Returns a standard Tcl return value. If an error occurs then an error
|
||
* message will be left in interp->result. If no error occurs, then
|
||
* additional Postscript will be appended to the interpreter's result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PostscriptPhoto(
|
||
Tcl_Interp *interp,
|
||
Tk_PhotoImageBlock *blockPtr,
|
||
Tk_PostscriptInfo psInfo,
|
||
int width, int height)
|
||
{
|
||
TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
|
||
int colorLevel = psInfoPtr->colorLevel;
|
||
const char *displayOperation, *decode;
|
||
unsigned char *pixelPtr;
|
||
int bpc, xx, yy, lineLen, alpha;
|
||
float red, green, blue;
|
||
int bytesPerLine = 0, maxWidth = 0;
|
||
unsigned char opaque = 255;
|
||
unsigned char *alphaPtr;
|
||
int alphaOffset, alphaPitch, alphaIncr;
|
||
Tcl_Obj *psObj;
|
||
|
||
if (psInfoPtr->prepass) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
if (colorLevel != 0) {
|
||
/*
|
||
* Color and gray-scale code.
|
||
*/
|
||
|
||
displayOperation = "TkPhotoColor";
|
||
} else {
|
||
/*
|
||
* Monochrome-only code
|
||
*/
|
||
|
||
displayOperation = "TkPhotoMono";
|
||
}
|
||
|
||
/*
|
||
* Check that at least one row of the image can be represented with a
|
||
* string less than 64 KB long (this is a limit in the Postscript
|
||
* interpreter).
|
||
*/
|
||
|
||
switch (colorLevel) {
|
||
case 0: bytesPerLine = (width + 7) / 8; maxWidth = 240000; break;
|
||
case 1: bytesPerLine = width; maxWidth = 60000; break;
|
||
default: bytesPerLine = 3 * width; maxWidth = 20000; break;
|
||
}
|
||
if (bytesPerLine > 60000) {
|
||
Tcl_ResetResult(interp);
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"can't generate Postscript for images more than %d pixels wide",
|
||
maxWidth));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "MEMLIMIT", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Set up the postscript code except for the image-data stream.
|
||
*/
|
||
|
||
psObj = GetPostscriptBuffer(interp);
|
||
switch (colorLevel) {
|
||
case 0:
|
||
Tcl_AppendToObj(psObj, "/DeviceGray setcolorspace\n\n", -1);
|
||
decode = "1 0";
|
||
bpc = 1;
|
||
break;
|
||
case 1:
|
||
Tcl_AppendToObj(psObj, "/DeviceGray setcolorspace\n\n", -1);
|
||
decode = "0 1";
|
||
bpc = 8;
|
||
break;
|
||
default:
|
||
Tcl_AppendToObj(psObj, "/DeviceRGB setcolorspace\n\n", -1);
|
||
decode = "0 1 0 1 0 1";
|
||
bpc = 8;
|
||
break;
|
||
}
|
||
|
||
Tcl_AppendPrintfToObj(psObj,
|
||
"<<\n /ImageType 1\n"
|
||
" /Width %d\n /Height %d\n /BitsPerComponent %d\n"
|
||
" /DataSource currentfile\n /ASCIIHexDecode filter\n"
|
||
" /ImageMatrix [1 0 0 -1 0 %d]\n /Decode [%s]\n>>\n"
|
||
"1 %s\n",
|
||
width, height, bpc, height, decode, displayOperation);
|
||
|
||
/*
|
||
* Check the PhotoImageBlock information. We assume that:
|
||
* if pixelSize is 1,2 or 4, the image is R,G,B,A;
|
||
* if pixelSize is 3, the image is R,G,B and offset[3] is bogus.
|
||
*/
|
||
|
||
if (blockPtr->pixelSize == 3) {
|
||
/*
|
||
* No alpha information: the whole image is opaque.
|
||
*/
|
||
|
||
alphaPtr = &opaque;
|
||
alphaPitch = alphaIncr = alphaOffset = 0;
|
||
} else {
|
||
/*
|
||
* Set up alpha handling.
|
||
*/
|
||
|
||
alphaPtr = blockPtr->pixelPtr;
|
||
alphaPitch = blockPtr->pitch;
|
||
alphaIncr = blockPtr->pixelSize;
|
||
alphaOffset = blockPtr->offset[3];
|
||
}
|
||
|
||
for (yy = 0, lineLen=0; yy < height; yy++) {
|
||
switch (colorLevel) {
|
||
case 0: {
|
||
/*
|
||
* Generate data for image in monochrome mode. No attempt at
|
||
* dithering is made--instead, just set a threshold. To handle
|
||
* transparencies we need to output two lines: one for the black
|
||
* pixels, one for the white ones.
|
||
*/
|
||
|
||
unsigned char mask = 0x80;
|
||
unsigned char data = 0x00;
|
||
|
||
for (xx = 0; xx< width; xx ++) {
|
||
pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
|
||
+ (xx *blockPtr->pixelSize);
|
||
|
||
red = pixelPtr[blockPtr->offset[0]];
|
||
green = pixelPtr[blockPtr->offset[1]];
|
||
blue = pixelPtr[blockPtr->offset[2]];
|
||
|
||
alpha = *(alphaPtr + (yy * alphaPitch)
|
||
+ (xx * alphaIncr) + alphaOffset);
|
||
|
||
/*
|
||
* If pixel is less than threshold, then it is black.
|
||
*/
|
||
|
||
if ((alpha != 0) &&
|
||
(0.3086*red + 0.6094*green + 0.082*blue < 128)) {
|
||
data |= mask;
|
||
}
|
||
mask >>= 1;
|
||
if (mask == 0) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", data);
|
||
lineLen += 2;
|
||
if (lineLen >= 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
mask = 0x80;
|
||
data = 0x00;
|
||
}
|
||
}
|
||
if ((width % 8) != 0) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", data);
|
||
mask = 0x80;
|
||
data = 0x00;
|
||
}
|
||
|
||
mask = 0x80;
|
||
data = 0x00;
|
||
for (xx=0 ; xx<width ; xx++) {
|
||
pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
|
||
+ (xx *blockPtr->pixelSize);
|
||
|
||
red = pixelPtr[blockPtr->offset[0]];
|
||
green = pixelPtr[blockPtr->offset[1]];
|
||
blue = pixelPtr[blockPtr->offset[2]];
|
||
|
||
alpha = *(alphaPtr + (yy * alphaPitch)
|
||
+ (xx * alphaIncr) + alphaOffset);
|
||
|
||
/*
|
||
* If pixel is greater than threshold, then it is white.
|
||
*/
|
||
|
||
if ((alpha != 0) &&
|
||
(0.3086*red + 0.6094*green + 0.082*blue >= 128)) {
|
||
data |= mask;
|
||
}
|
||
mask >>= 1;
|
||
if (mask == 0) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", data);
|
||
lineLen += 2;
|
||
if (lineLen >= 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
mask = 0x80;
|
||
data = 0x00;
|
||
}
|
||
}
|
||
if ((width % 8) != 0) {
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", data);
|
||
mask = 0x80;
|
||
data = 0x00;
|
||
}
|
||
break;
|
||
}
|
||
case 1: {
|
||
/*
|
||
* Generate transparency data. We must prevent a transparent value
|
||
* of 0 because of a bug in some HP printers.
|
||
*/
|
||
|
||
for (xx = 0; xx < width; xx ++) {
|
||
alpha = *(alphaPtr + (yy * alphaPitch)
|
||
+ (xx * alphaIncr) + alphaOffset);
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", alpha | 0x01);
|
||
lineLen += 2;
|
||
if (lineLen >= 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Generate data in gray mode; in this case, take a weighted sum
|
||
* of the red, green, and blue values.
|
||
*/
|
||
|
||
for (xx = 0; xx < width; xx ++) {
|
||
pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
|
||
+ (xx *blockPtr->pixelSize);
|
||
|
||
red = pixelPtr[blockPtr->offset[0]];
|
||
green = pixelPtr[blockPtr->offset[1]];
|
||
blue = pixelPtr[blockPtr->offset[2]];
|
||
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", (int) floor(0.5 +
|
||
( 0.3086 * red + 0.6094 * green + 0.0820 * blue)));
|
||
lineLen += 2;
|
||
if (lineLen >= 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
/*
|
||
* Generate transparency data. We must prevent a transparent value
|
||
* of 0 because of a bug in some HP printers.
|
||
*/
|
||
|
||
for (xx = 0; xx < width; xx ++) {
|
||
alpha = *(alphaPtr + (yy * alphaPitch)
|
||
+ (xx * alphaIncr) + alphaOffset);
|
||
Tcl_AppendPrintfToObj(psObj, "%02X", alpha | 0x01);
|
||
lineLen += 2;
|
||
if (lineLen >= 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Finally, color mode. Here, just output the red, green, and blue
|
||
* values directly.
|
||
*/
|
||
|
||
for (xx = 0; xx < width; xx ++) {
|
||
pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
|
||
+ (xx * blockPtr->pixelSize);
|
||
|
||
Tcl_AppendPrintfToObj(psObj, "%02X%02X%02X",
|
||
pixelPtr[blockPtr->offset[0]],
|
||
pixelPtr[blockPtr->offset[1]],
|
||
pixelPtr[blockPtr->offset[2]]);
|
||
lineLen += 6;
|
||
if (lineLen >= 60) {
|
||
lineLen = 0;
|
||
Tcl_AppendToObj(psObj, "\n", -1);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* The end-of-data marker.
|
||
*/
|
||
|
||
Tcl_AppendToObj(psObj, ">\n", -1);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|