Import Tk 8.5.15 (as of svn r89086)
This commit is contained in:
Zachary Ware
979
generic/tkCanvBmap.c
Normal file
979
generic/tkCanvBmap.c
Normal file
@@ -0,0 +1,979 @@
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/*
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* tkCanvBmap.c --
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*
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* This file implements bitmap items for canvas widgets.
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*
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* Copyright (c) 1992-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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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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#include <stdio.h>
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#include "tkInt.h"
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#include "tkCanvas.h"
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/*
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* The structure below defines the record for each bitmap item.
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*/
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typedef struct BitmapItem {
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Tk_Item header; /* Generic stuff that's the same for all
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* types. MUST BE FIRST IN STRUCTURE. */
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double x, y; /* Coordinates of positioning point for
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* bitmap. */
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Tk_Anchor anchor; /* Where to anchor bitmap relative to (x,y) */
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Pixmap bitmap; /* Bitmap to display in window. */
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Pixmap activeBitmap; /* Bitmap to display in window. */
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Pixmap disabledBitmap; /* Bitmap to display in window. */
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XColor *fgColor; /* Foreground color to use for bitmap. */
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XColor *activeFgColor; /* Foreground color to use for bitmap. */
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XColor *disabledFgColor; /* Foreground color to use for bitmap. */
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XColor *bgColor; /* Background color to use for bitmap. */
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XColor *activeBgColor; /* Background color to use for bitmap. */
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XColor *disabledBgColor; /* Background color to use for bitmap. */
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GC gc; /* Graphics context to use for drawing bitmap
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* on screen. */
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} BitmapItem;
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/*
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* Information used for parsing configuration specs:
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*/
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static Tk_CustomOption stateOption = {
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(Tk_OptionParseProc *) TkStateParseProc,
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TkStatePrintProc, (ClientData) 2
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};
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static Tk_CustomOption tagsOption = {
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(Tk_OptionParseProc *) Tk_CanvasTagsParseProc,
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Tk_CanvasTagsPrintProc, (ClientData) NULL
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};
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static Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_COLOR, "-activebackground", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, activeBgColor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_BITMAP, "-activebitmap", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, activeBitmap), TK_CONFIG_NULL_OK},
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{TK_CONFIG_COLOR, "-activeforeground", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, activeFgColor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_ANCHOR, "-anchor", NULL, NULL,
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"center", Tk_Offset(BitmapItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_COLOR, "-background", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, bgColor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_BITMAP, "-bitmap", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, bitmap), TK_CONFIG_NULL_OK},
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{TK_CONFIG_COLOR, "-disabledbackground", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, disabledBgColor),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_BITMAP, "-disabledbitmap", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, disabledBitmap),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_COLOR, "-disabledforeground", NULL, NULL,
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NULL, Tk_Offset(BitmapItem, disabledFgColor),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_COLOR, "-foreground", NULL, NULL,
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"black", Tk_Offset(BitmapItem, fgColor), 0},
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{TK_CONFIG_CUSTOM, "-state", NULL, NULL,
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NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK,
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&stateOption},
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{TK_CONFIG_CUSTOM, "-tags", NULL, NULL,
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NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
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{TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}
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};
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/*
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* Prototypes for functions defined in this file:
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*/
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static int BitmapCoords(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
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Tcl_Obj *CONST objv[]);
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static int BitmapToArea(Tk_Canvas canvas,
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Tk_Item *itemPtr, double *rectPtr);
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static double BitmapToPoint(Tk_Canvas canvas,
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Tk_Item *itemPtr, double *coordPtr);
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static int BitmapToPostscript(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
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static void ComputeBitmapBbox(Tk_Canvas canvas,
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BitmapItem *bmapPtr);
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static int ConfigureBitmap(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
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Tcl_Obj *CONST objv[], int flags);
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static int TkcCreateBitmap(Tcl_Interp *interp,
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Tk_Canvas canvas, struct Tk_Item *itemPtr,
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int objc, Tcl_Obj *CONST objv[]);
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static void DeleteBitmap(Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display);
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static void DisplayBitmap(Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display, Drawable dst,
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int x, int y, int width, int height);
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static void ScaleBitmap(Tk_Canvas canvas,
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Tk_Item *itemPtr, double originX, double originY,
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double scaleX, double scaleY);
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static void TranslateBitmap(Tk_Canvas canvas, Tk_Item *itemPtr,
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double deltaX, double deltaY);
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/*
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* The structures below defines the bitmap item type in terms of functions
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* that can be invoked by generic item code.
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*/
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Tk_ItemType tkBitmapType = {
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"bitmap", /* name */
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sizeof(BitmapItem), /* itemSize */
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TkcCreateBitmap, /* createProc */
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configSpecs, /* configSpecs */
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ConfigureBitmap, /* configureProc */
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BitmapCoords, /* coordProc */
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DeleteBitmap, /* deleteProc */
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DisplayBitmap, /* displayProc */
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TK_CONFIG_OBJS, /* flags */
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BitmapToPoint, /* pointProc */
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BitmapToArea, /* areaProc */
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BitmapToPostscript, /* postscriptProc */
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ScaleBitmap, /* scaleProc */
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TranslateBitmap, /* translateProc */
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NULL, /* indexProc */
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NULL, /* icursorProc */
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NULL, /* selectionProc */
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NULL, /* insertProc */
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NULL, /* dTextProc */
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NULL, /* nextPtr */
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};
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/*
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*--------------------------------------------------------------
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*
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* TkcCreateBitmap --
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*
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* This function is invoked to create a new bitmap item in a canvas.
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*
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* Results:
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* A standard Tcl return value. If an error occurred in creating the
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* item, then an error message is left in the interp's result; in this
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* case itemPtr is left uninitialized, so it can be safely freed by the
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* caller.
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*
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* Side effects:
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* A new bitmap item is created.
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*
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*--------------------------------------------------------------
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*/
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static int
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TkcCreateBitmap(
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Tcl_Interp *interp, /* Interpreter for error reporting. */
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Tk_Canvas canvas, /* Canvas to hold new item. */
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Tk_Item *itemPtr, /* Record to hold new item; header has been
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* initialized by caller. */
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int objc, /* Number of arguments in objv. */
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Tcl_Obj *CONST objv[]) /* Arguments describing rectangle. */
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{
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BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
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int i;
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if (objc == 0) {
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Tcl_Panic("canvas did not pass any coords\n");
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}
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/*
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* Initialize item's record.
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*/
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bmapPtr->anchor = TK_ANCHOR_CENTER;
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bmapPtr->bitmap = None;
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bmapPtr->activeBitmap = None;
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bmapPtr->disabledBitmap = None;
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bmapPtr->fgColor = NULL;
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bmapPtr->activeFgColor = NULL;
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bmapPtr->disabledFgColor = NULL;
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bmapPtr->bgColor = NULL;
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bmapPtr->activeBgColor = NULL;
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bmapPtr->disabledBgColor = NULL;
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bmapPtr->gc = None;
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/*
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* Process the arguments to fill in the item record. Only 1 (list) or 2 (x
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* y) coords are allowed.
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*/
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if (objc == 1) {
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i = 1;
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} else {
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char *arg = Tcl_GetString(objv[1]);
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i = 2;
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if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) {
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i = 1;
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}
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}
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if (BitmapCoords(interp, canvas, itemPtr, i, objv) != TCL_OK) {
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goto error;
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}
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if (ConfigureBitmap(interp, canvas, itemPtr, objc-i, objv+i, 0)
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== TCL_OK) {
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return TCL_OK;
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}
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error:
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DeleteBitmap(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
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return TCL_ERROR;
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}
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/*
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*--------------------------------------------------------------
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*
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* BitmapCoords --
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*
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* This function is invoked to process the "coords" widget command on
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* bitmap items. See the user documentation for details on what it does.
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*
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* Results:
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* Returns TCL_OK or TCL_ERROR, and sets the interp's result.
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*
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* Side effects:
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* The coordinates for the given item may be changed.
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*
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*--------------------------------------------------------------
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*/
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static int
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BitmapCoords(
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Tcl_Interp *interp, /* Used for error reporting. */
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Tk_Canvas canvas, /* Canvas containing item. */
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Tk_Item *itemPtr, /* Item whose coordinates are to be read or
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* modified. */
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int objc, /* Number of coordinates supplied in objv. */
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Tcl_Obj *CONST objv[]) /* Array of coordinates: x1, y1, x2, y2, ... */
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{
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BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
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if (objc == 0) {
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Tcl_Obj *obj = Tcl_NewObj();
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Tcl_Obj *subobj = Tcl_NewDoubleObj(bmapPtr->x);
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Tcl_ListObjAppendElement(interp, obj, subobj);
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subobj = Tcl_NewDoubleObj(bmapPtr->y);
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Tcl_ListObjAppendElement(interp, obj, subobj);
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Tcl_SetObjResult(interp, obj);
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} else if (objc < 3) {
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if (objc == 1) {
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if (Tcl_ListObjGetElements(interp, objv[0], &objc,
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(Tcl_Obj ***) &objv) != TCL_OK) {
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return TCL_ERROR;
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} else if (objc != 2) {
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char buf[64 + TCL_INTEGER_SPACE];
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sprintf(buf, "wrong # coordinates: expected 2, got %d", objc);
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Tcl_SetResult(interp, buf, TCL_VOLATILE);
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return TCL_ERROR;
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}
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}
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if ((Tk_CanvasGetCoordFromObj(interp, canvas, objv[0],
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&bmapPtr->x) != TCL_OK)
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|| (Tk_CanvasGetCoordFromObj(interp, canvas, objv[1],
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&bmapPtr->y) != TCL_OK)) {
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return TCL_ERROR;
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}
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ComputeBitmapBbox(canvas, bmapPtr);
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} else {
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char buf[64 + TCL_INTEGER_SPACE];
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sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", objc);
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Tcl_SetResult(interp, buf, TCL_VOLATILE);
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return TCL_ERROR;
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}
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return TCL_OK;
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}
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/*
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*--------------------------------------------------------------
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*
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* ConfigureBitmap --
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*
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* This function is invoked to configure various aspects of a bitmap
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* item, such as its anchor position.
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*
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* Results:
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* A standard Tcl result code. If an error occurs, then an error message
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* is left in the interp's result.
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*
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* Side effects:
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* Configuration information may be set for itemPtr.
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*
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*--------------------------------------------------------------
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*/
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static int
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ConfigureBitmap(
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Tcl_Interp *interp, /* Used for error reporting. */
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Tk_Canvas canvas, /* Canvas containing itemPtr. */
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Tk_Item *itemPtr, /* Bitmap item to reconfigure. */
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int objc, /* Number of elements in objv. */
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Tcl_Obj *CONST objv[], /* Arguments describing things to configure. */
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int flags) /* Flags to pass to Tk_ConfigureWidget. */
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{
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BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
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XGCValues gcValues;
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GC newGC;
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Tk_Window tkwin;
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unsigned long mask;
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XColor *fgColor;
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XColor *bgColor;
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Pixmap bitmap;
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Tk_State state;
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tkwin = Tk_CanvasTkwin(canvas);
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if (TCL_OK != Tk_ConfigureWidget(interp, tkwin, configSpecs, objc,
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(CONST char **) objv, (char *) bmapPtr, flags|TK_CONFIG_OBJS)) {
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return TCL_ERROR;
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}
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/*
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* A few of the options require additional processing, such as those that
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* determine the graphics context.
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*/
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state = itemPtr->state;
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if (bmapPtr->activeFgColor!=NULL ||
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bmapPtr->activeBgColor!=NULL ||
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bmapPtr->activeBitmap!=None) {
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itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
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} else {
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itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
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}
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if (state == TK_STATE_NULL) {
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state = ((TkCanvas *)canvas)->canvas_state;
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}
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if (state == TK_STATE_HIDDEN) {
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ComputeBitmapBbox(canvas, bmapPtr);
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return TCL_OK;
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}
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fgColor = bmapPtr->fgColor;
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bgColor = bmapPtr->bgColor;
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bitmap = bmapPtr->bitmap;
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if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
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if (bmapPtr->activeFgColor!=NULL) {
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fgColor = bmapPtr->activeFgColor;
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}
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if (bmapPtr->activeBgColor!=NULL) {
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bgColor = bmapPtr->activeBgColor;
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}
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||||
if (bmapPtr->activeBitmap!=None) {
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bitmap = bmapPtr->activeBitmap;
|
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}
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} else if (state == TK_STATE_DISABLED) {
|
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if (bmapPtr->disabledFgColor!=NULL) {
|
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fgColor = bmapPtr->disabledFgColor;
|
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}
|
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if (bmapPtr->disabledBgColor!=NULL) {
|
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bgColor = bmapPtr->disabledBgColor;
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}
|
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if (bmapPtr->disabledBitmap!=None) {
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bitmap = bmapPtr->disabledBitmap;
|
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}
|
||||
}
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||||
|
||||
if (bitmap == None) {
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newGC = None;
|
||||
} else {
|
||||
gcValues.foreground = fgColor->pixel;
|
||||
mask = GCForeground;
|
||||
if (bgColor != NULL) {
|
||||
gcValues.background = bgColor->pixel;
|
||||
mask |= GCBackground;
|
||||
} else {
|
||||
gcValues.clip_mask = bitmap;
|
||||
mask |= GCClipMask;
|
||||
}
|
||||
newGC = Tk_GetGC(tkwin, mask, &gcValues);
|
||||
}
|
||||
if (bmapPtr->gc != None) {
|
||||
Tk_FreeGC(Tk_Display(tkwin), bmapPtr->gc);
|
||||
}
|
||||
bmapPtr->gc = newGC;
|
||||
|
||||
ComputeBitmapBbox(canvas, bmapPtr);
|
||||
return TCL_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* DeleteBitmap --
|
||||
*
|
||||
* This function is called to clean up the data structure associated with
|
||||
* a bitmap item.
|
||||
*
|
||||
* Results:
|
||||
* None.
|
||||
*
|
||||
* Side effects:
|
||||
* Resources associated with itemPtr are released.
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
static void
|
||||
DeleteBitmap(
|
||||
Tk_Canvas canvas, /* Info about overall canvas widget. */
|
||||
Tk_Item *itemPtr, /* Item that is being deleted. */
|
||||
Display *display) /* Display containing window for canvas. */
|
||||
{
|
||||
BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||||
|
||||
if (bmapPtr->bitmap != None) {
|
||||
Tk_FreeBitmap(display, bmapPtr->bitmap);
|
||||
}
|
||||
if (bmapPtr->activeBitmap != None) {
|
||||
Tk_FreeBitmap(display, bmapPtr->activeBitmap);
|
||||
}
|
||||
if (bmapPtr->disabledBitmap != None) {
|
||||
Tk_FreeBitmap(display, bmapPtr->disabledBitmap);
|
||||
}
|
||||
if (bmapPtr->fgColor != NULL) {
|
||||
Tk_FreeColor(bmapPtr->fgColor);
|
||||
}
|
||||
if (bmapPtr->activeFgColor != NULL) {
|
||||
Tk_FreeColor(bmapPtr->activeFgColor);
|
||||
}
|
||||
if (bmapPtr->disabledFgColor != NULL) {
|
||||
Tk_FreeColor(bmapPtr->disabledFgColor);
|
||||
}
|
||||
if (bmapPtr->bgColor != NULL) {
|
||||
Tk_FreeColor(bmapPtr->bgColor);
|
||||
}
|
||||
if (bmapPtr->activeBgColor != NULL) {
|
||||
Tk_FreeColor(bmapPtr->activeBgColor);
|
||||
}
|
||||
if (bmapPtr->disabledBgColor != NULL) {
|
||||
Tk_FreeColor(bmapPtr->disabledBgColor);
|
||||
}
|
||||
if (bmapPtr->gc != NULL) {
|
||||
Tk_FreeGC(display, bmapPtr->gc);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* ComputeBitmapBbox --
|
||||
*
|
||||
* This function is invoked to compute the bounding box of all the pixels
|
||||
* that may be drawn as part of a bitmap item. This function is where the
|
||||
* child bitmap's placement is computed.
|
||||
*
|
||||
* Results:
|
||||
* None.
|
||||
*
|
||||
* Side effects:
|
||||
* The fields x1, y1, x2, and y2 are updated in the header for itemPtr.
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
/* ARGSUSED */
|
||||
static void
|
||||
ComputeBitmapBbox(
|
||||
Tk_Canvas canvas, /* Canvas that contains item. */
|
||||
BitmapItem *bmapPtr) /* Item whose bbox is to be recomputed. */
|
||||
{
|
||||
int width, height;
|
||||
int x, y;
|
||||
Pixmap bitmap;
|
||||
Tk_State state = bmapPtr->header.state;
|
||||
|
||||
if (state == TK_STATE_NULL) {
|
||||
state = ((TkCanvas *)canvas)->canvas_state;
|
||||
}
|
||||
bitmap = bmapPtr->bitmap;
|
||||
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)bmapPtr) {
|
||||
if (bmapPtr->activeBitmap!=None) {
|
||||
bitmap = bmapPtr->activeBitmap;
|
||||
}
|
||||
} else if (state==TK_STATE_DISABLED) {
|
||||
if (bmapPtr->disabledBitmap!=None) {
|
||||
bitmap = bmapPtr->disabledBitmap;
|
||||
}
|
||||
}
|
||||
|
||||
x = (int) (bmapPtr->x + ((bmapPtr->x >= 0) ? 0.5 : - 0.5));
|
||||
y = (int) (bmapPtr->y + ((bmapPtr->y >= 0) ? 0.5 : - 0.5));
|
||||
|
||||
if (state==TK_STATE_HIDDEN || bitmap == None) {
|
||||
bmapPtr->header.x1 = bmapPtr->header.x2 = x;
|
||||
bmapPtr->header.y1 = bmapPtr->header.y2 = y;
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Compute location and size of bitmap, using anchor information.
|
||||
*/
|
||||
|
||||
Tk_SizeOfBitmap(Tk_Display(Tk_CanvasTkwin(canvas)), bitmap,
|
||||
&width, &height);
|
||||
switch (bmapPtr->anchor) {
|
||||
case TK_ANCHOR_N:
|
||||
x -= width/2;
|
||||
break;
|
||||
case TK_ANCHOR_NE:
|
||||
x -= width;
|
||||
break;
|
||||
case TK_ANCHOR_E:
|
||||
x -= width;
|
||||
y -= height/2;
|
||||
break;
|
||||
case TK_ANCHOR_SE:
|
||||
x -= width;
|
||||
y -= height;
|
||||
break;
|
||||
case TK_ANCHOR_S:
|
||||
x -= width/2;
|
||||
y -= height;
|
||||
break;
|
||||
case TK_ANCHOR_SW:
|
||||
y -= height;
|
||||
break;
|
||||
case TK_ANCHOR_W:
|
||||
y -= height/2;
|
||||
break;
|
||||
case TK_ANCHOR_NW:
|
||||
break;
|
||||
case TK_ANCHOR_CENTER:
|
||||
x -= width/2;
|
||||
y -= height/2;
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Store the information in the item header.
|
||||
*/
|
||||
|
||||
bmapPtr->header.x1 = x;
|
||||
bmapPtr->header.y1 = y;
|
||||
bmapPtr->header.x2 = x + width;
|
||||
bmapPtr->header.y2 = y + height;
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* DisplayBitmap --
|
||||
*
|
||||
* This function is invoked to draw a bitmap item in a given drawable.
|
||||
*
|
||||
* Results:
|
||||
* None.
|
||||
*
|
||||
* Side effects:
|
||||
* ItemPtr is drawn in drawable using the transformation information in
|
||||
* canvas.
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
static void
|
||||
DisplayBitmap(
|
||||
Tk_Canvas canvas, /* Canvas that contains item. */
|
||||
Tk_Item *itemPtr, /* Item to be displayed. */
|
||||
Display *display, /* Display on which to draw item. */
|
||||
Drawable drawable, /* Pixmap or window in which to draw item. */
|
||||
int x, int y, int width, int height)
|
||||
/* Describes region of canvas that must be
|
||||
* redisplayed (not used). */
|
||||
{
|
||||
BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||||
int bmapX, bmapY, bmapWidth, bmapHeight;
|
||||
short drawableX, drawableY;
|
||||
Pixmap bitmap;
|
||||
Tk_State state = itemPtr->state;
|
||||
|
||||
/*
|
||||
* If the area being displayed doesn't cover the whole bitmap, then only
|
||||
* redisplay the part of the bitmap that needs redisplay.
|
||||
*/
|
||||
|
||||
if (state == TK_STATE_NULL) {
|
||||
state = ((TkCanvas *)canvas)->canvas_state;
|
||||
}
|
||||
bitmap = bmapPtr->bitmap;
|
||||
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
||||
if (bmapPtr->activeBitmap!=None) {
|
||||
bitmap = bmapPtr->activeBitmap;
|
||||
}
|
||||
} else if (state == TK_STATE_DISABLED) {
|
||||
if (bmapPtr->disabledBitmap!=None) {
|
||||
bitmap = bmapPtr->disabledBitmap;
|
||||
}
|
||||
}
|
||||
|
||||
if (bitmap != None) {
|
||||
if (x > bmapPtr->header.x1) {
|
||||
bmapX = x - bmapPtr->header.x1;
|
||||
bmapWidth = bmapPtr->header.x2 - x;
|
||||
} else {
|
||||
bmapX = 0;
|
||||
if ((x+width) < bmapPtr->header.x2) {
|
||||
bmapWidth = x + width - bmapPtr->header.x1;
|
||||
} else {
|
||||
bmapWidth = bmapPtr->header.x2 - bmapPtr->header.x1;
|
||||
}
|
||||
}
|
||||
if (y > bmapPtr->header.y1) {
|
||||
bmapY = y - bmapPtr->header.y1;
|
||||
bmapHeight = bmapPtr->header.y2 - y;
|
||||
} else {
|
||||
bmapY = 0;
|
||||
if ((y+height) < bmapPtr->header.y2) {
|
||||
bmapHeight = y + height - bmapPtr->header.y1;
|
||||
} else {
|
||||
bmapHeight = bmapPtr->header.y2 - bmapPtr->header.y1;
|
||||
}
|
||||
}
|
||||
Tk_CanvasDrawableCoords(canvas,
|
||||
(double) (bmapPtr->header.x1 + bmapX),
|
||||
(double) (bmapPtr->header.y1 + bmapY),
|
||||
&drawableX, &drawableY);
|
||||
|
||||
/*
|
||||
* Must modify the mask origin within the graphics context to line up
|
||||
* with the bitmap's origin (in order to make bitmaps with
|
||||
* "-background {}" work right).
|
||||
*/
|
||||
|
||||
XSetClipOrigin(display, bmapPtr->gc, drawableX - bmapX,
|
||||
drawableY - bmapY);
|
||||
XCopyPlane(display, bitmap, drawable,
|
||||
bmapPtr->gc, bmapX, bmapY, (unsigned int) bmapWidth,
|
||||
(unsigned int) bmapHeight, drawableX, drawableY, 1);
|
||||
XSetClipOrigin(display, bmapPtr->gc, 0, 0);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* BitmapToPoint --
|
||||
*
|
||||
* Computes the distance from a given point to a given rectangle, in
|
||||
* canvas units.
|
||||
*
|
||||
* Results:
|
||||
* The return value is 0 if the point whose x and y coordinates are
|
||||
* coordPtr[0] and coordPtr[1] is inside the bitmap. If the point isn't
|
||||
* inside the bitmap then the return value is the distance from the point
|
||||
* to the bitmap.
|
||||
*
|
||||
* Side effects:
|
||||
* None.
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
/* ARGSUSED */
|
||||
static double
|
||||
BitmapToPoint(
|
||||
Tk_Canvas canvas, /* Canvas containing item. */
|
||||
Tk_Item *itemPtr, /* Item to check against point. */
|
||||
double *coordPtr) /* Pointer to x and y coordinates. */
|
||||
{
|
||||
BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||||
double x1, x2, y1, y2, xDiff, yDiff;
|
||||
|
||||
x1 = bmapPtr->header.x1;
|
||||
y1 = bmapPtr->header.y1;
|
||||
x2 = bmapPtr->header.x2;
|
||||
y2 = bmapPtr->header.y2;
|
||||
|
||||
/*
|
||||
* Point is outside rectangle.
|
||||
*/
|
||||
|
||||
if (coordPtr[0] < x1) {
|
||||
xDiff = x1 - coordPtr[0];
|
||||
} else if (coordPtr[0] > x2) {
|
||||
xDiff = coordPtr[0] - x2;
|
||||
} else {
|
||||
xDiff = 0;
|
||||
}
|
||||
|
||||
if (coordPtr[1] < y1) {
|
||||
yDiff = y1 - coordPtr[1];
|
||||
} else if (coordPtr[1] > y2) {
|
||||
yDiff = coordPtr[1] - y2;
|
||||
} else {
|
||||
yDiff = 0;
|
||||
}
|
||||
|
||||
return hypot(xDiff, yDiff);
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* BitmapToArea --
|
||||
*
|
||||
* This function is called to determine whether an item lies entirely
|
||||
* inside, entirely outside, or overlapping a given rectangle.
|
||||
*
|
||||
* Results:
|
||||
* -1 is returned if the item is entirely outside the area given by
|
||||
* rectPtr, 0 if it overlaps, and 1 if it is entirely inside the given
|
||||
* area.
|
||||
*
|
||||
* Side effects:
|
||||
* None.
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
/* ARGSUSED */
|
||||
static int
|
||||
BitmapToArea(
|
||||
Tk_Canvas canvas, /* Canvas containing item. */
|
||||
Tk_Item *itemPtr, /* Item to check against rectangle. */
|
||||
double *rectPtr) /* Pointer to array of four coordinates
|
||||
* (x1,y1,x2,y2) describing rectangular
|
||||
* area. */
|
||||
{
|
||||
BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||||
|
||||
if ((rectPtr[2] <= bmapPtr->header.x1)
|
||||
|| (rectPtr[0] >= bmapPtr->header.x2)
|
||||
|| (rectPtr[3] <= bmapPtr->header.y1)
|
||||
|| (rectPtr[1] >= bmapPtr->header.y2)) {
|
||||
return -1;
|
||||
}
|
||||
if ((rectPtr[0] <= bmapPtr->header.x1)
|
||||
&& (rectPtr[1] <= bmapPtr->header.y1)
|
||||
&& (rectPtr[2] >= bmapPtr->header.x2)
|
||||
&& (rectPtr[3] >= bmapPtr->header.y2)) {
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* ScaleBitmap --
|
||||
*
|
||||
* This function is invoked to rescale a bitmap item in a canvas. It is
|
||||
* one of the standard item functions for bitmap items, and is invoked by
|
||||
* the generic canvas code.
|
||||
*
|
||||
* Results:
|
||||
* None.
|
||||
*
|
||||
* Side effects:
|
||||
* The item referred to by itemPtr is rescaled so that the following
|
||||
* transformation is applied to all point coordinates:
|
||||
* x' = originX + scaleX*(x-originX)
|
||||
* y' = originY + scaleY*(y-originY)
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
static void
|
||||
ScaleBitmap(
|
||||
Tk_Canvas canvas, /* Canvas containing rectangle. */
|
||||
Tk_Item *itemPtr, /* Rectangle to be scaled. */
|
||||
double originX, double originY,
|
||||
/* Origin about which to scale item. */
|
||||
double scaleX, /* Amount to scale in X direction. */
|
||||
double scaleY) /* Amount to scale in Y direction. */
|
||||
{
|
||||
BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||||
|
||||
bmapPtr->x = originX + scaleX*(bmapPtr->x - originX);
|
||||
bmapPtr->y = originY + scaleY*(bmapPtr->y - originY);
|
||||
ComputeBitmapBbox(canvas, bmapPtr);
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* TranslateBitmap --
|
||||
*
|
||||
* This function is called to move an item by a given amount.
|
||||
*
|
||||
* Results:
|
||||
* None.
|
||||
*
|
||||
* Side effects:
|
||||
* The position of the item is offset by (xDelta, yDelta), and the
|
||||
* bounding box is updated in the generic part of the item structure.
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
static void
|
||||
TranslateBitmap(
|
||||
Tk_Canvas canvas, /* Canvas containing item. */
|
||||
Tk_Item *itemPtr, /* Item that is being moved. */
|
||||
double deltaX, double deltaY)
|
||||
/* Amount by which item is to be moved. */
|
||||
{
|
||||
BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||||
|
||||
bmapPtr->x += deltaX;
|
||||
bmapPtr->y += deltaY;
|
||||
ComputeBitmapBbox(canvas, bmapPtr);
|
||||
}
|
||||
|
||||
/*
|
||||
*--------------------------------------------------------------
|
||||
*
|
||||
* BitmapToPostscript --
|
||||
*
|
||||
* This function is called to generate Postscript for bitmap items.
|
||||
*
|
||||
* Results:
|
||||
* The return value is a standard Tcl result. If an error occurs in
|
||||
* generating Postscript then an error message is left in the interp's
|
||||
* result, replacing whatever used to be there. If no error occurs, then
|
||||
* Postscript for the item is appended to the result.
|
||||
*
|
||||
* Side effects:
|
||||
* None.
|
||||
*
|
||||
*--------------------------------------------------------------
|
||||
*/
|
||||
|
||||
static int
|
||||
BitmapToPostscript(
|
||||
Tcl_Interp *interp, /* Leave Postscript or error message here. */
|
||||
Tk_Canvas canvas, /* Information about overall canvas. */
|
||||
Tk_Item *itemPtr, /* Item for which Postscript is wanted. */
|
||||
int prepass) /* 1 means this is a prepass to collect font
|
||||
* information; 0 means final Postscript is
|
||||
* being created. */
|
||||
{
|
||||
BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||||
double x, y;
|
||||
int width, height, rowsAtOnce, rowsThisTime;
|
||||
int curRow;
|
||||
char buffer[100 + TCL_DOUBLE_SPACE * 2 + TCL_INTEGER_SPACE * 4];
|
||||
XColor *fgColor;
|
||||
XColor *bgColor;
|
||||
Pixmap bitmap;
|
||||
Tk_State state = itemPtr->state;
|
||||
|
||||
if (state == TK_STATE_NULL) {
|
||||
state = ((TkCanvas *)canvas)->canvas_state;
|
||||
}
|
||||
fgColor = bmapPtr->fgColor;
|
||||
bgColor = bmapPtr->bgColor;
|
||||
bitmap = bmapPtr->bitmap;
|
||||
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
||||
if (bmapPtr->activeFgColor!=NULL) {
|
||||
fgColor = bmapPtr->activeFgColor;
|
||||
}
|
||||
if (bmapPtr->activeBgColor!=NULL) {
|
||||
bgColor = bmapPtr->activeBgColor;
|
||||
}
|
||||
if (bmapPtr->activeBitmap!=None) {
|
||||
bitmap = bmapPtr->activeBitmap;
|
||||
}
|
||||
} else if (state == TK_STATE_DISABLED) {
|
||||
if (bmapPtr->disabledFgColor!=NULL) {
|
||||
fgColor = bmapPtr->disabledFgColor;
|
||||
}
|
||||
if (bmapPtr->disabledBgColor!=NULL) {
|
||||
bgColor = bmapPtr->disabledBgColor;
|
||||
}
|
||||
if (bmapPtr->disabledBitmap!=None) {
|
||||
bitmap = bmapPtr->disabledBitmap;
|
||||
}
|
||||
}
|
||||
|
||||
if (bitmap == None) {
|
||||
return TCL_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
* Compute the coordinates of the lower-left corner of the bitmap, taking
|
||||
* into account the anchor position for the bitmp.
|
||||
*/
|
||||
|
||||
x = bmapPtr->x;
|
||||
y = Tk_CanvasPsY(canvas, bmapPtr->y);
|
||||
Tk_SizeOfBitmap(Tk_Display(Tk_CanvasTkwin(canvas)), bitmap,
|
||||
&width, &height);
|
||||
switch (bmapPtr->anchor) {
|
||||
case TK_ANCHOR_NW: y -= height; break;
|
||||
case TK_ANCHOR_N: x -= width/2.0; y -= height; break;
|
||||
case TK_ANCHOR_NE: x -= width; y -= height; break;
|
||||
case TK_ANCHOR_E: x -= width; y -= height/2.0; break;
|
||||
case TK_ANCHOR_SE: x -= width; break;
|
||||
case TK_ANCHOR_S: x -= width/2.0; break;
|
||||
case TK_ANCHOR_SW: break;
|
||||
case TK_ANCHOR_W: y -= height/2.0; break;
|
||||
case TK_ANCHOR_CENTER: x -= width/2.0; y -= height/2.0; break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Color the background, if there is one.
|
||||
*/
|
||||
|
||||
if (bgColor != NULL) {
|
||||
sprintf(buffer,
|
||||
"%.15g %.15g moveto %d 0 rlineto 0 %d rlineto %d %s\n",
|
||||
x, y, width, height, -width, "0 rlineto closepath");
|
||||
Tcl_AppendResult(interp, buffer, NULL);
|
||||
if (Tk_CanvasPsColor(interp, canvas, bgColor) != TCL_OK) {
|
||||
return TCL_ERROR;
|
||||
}
|
||||
Tcl_AppendResult(interp, "fill\n", NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Draw the bitmap, if there is a foreground color. If the bitmap is very
|
||||
* large, then chop it up into multiple bitmaps, each consisting of one or
|
||||
* more rows. This is needed because Postscript can't handle single
|
||||
* strings longer than 64 KBytes long.
|
||||
*/
|
||||
|
||||
if (fgColor != NULL) {
|
||||
if (Tk_CanvasPsColor(interp, canvas, fgColor) != TCL_OK) {
|
||||
return TCL_ERROR;
|
||||
}
|
||||
if (width > 60000) {
|
||||
Tcl_ResetResult(interp);
|
||||
Tcl_AppendResult(interp, "can't generate Postscript",
|
||||
" for bitmaps more than 60000 pixels wide", NULL);
|
||||
return TCL_ERROR;
|
||||
}
|
||||
rowsAtOnce = 60000/width;
|
||||
if (rowsAtOnce < 1) {
|
||||
rowsAtOnce = 1;
|
||||
}
|
||||
sprintf(buffer, "%.15g %.15g translate\n", x, y+height);
|
||||
Tcl_AppendResult(interp, buffer, NULL);
|
||||
for (curRow = 0; curRow < height; curRow += rowsAtOnce) {
|
||||
rowsThisTime = rowsAtOnce;
|
||||
if (rowsThisTime > (height - curRow)) {
|
||||
rowsThisTime = height - curRow;
|
||||
}
|
||||
sprintf(buffer, "0 -%.15g translate\n%d %d true matrix {\n",
|
||||
(double) rowsThisTime, width, rowsThisTime);
|
||||
Tcl_AppendResult(interp, buffer, NULL);
|
||||
if (Tk_CanvasPsBitmap(interp, canvas, bitmap,
|
||||
0, curRow, width, rowsThisTime) != TCL_OK) {
|
||||
return TCL_ERROR;
|
||||
}
|
||||
Tcl_AppendResult(interp, "\n} imagemask\n", NULL);
|
||||
}
|
||||
}
|
||||
return TCL_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
* Local Variables:
|
||||
* mode: c
|
||||
* c-basic-offset: 4
|
||||
* fill-column: 78
|
||||
* End:
|
||||
*/
|
||||
Reference in New Issue
Block a user