731 lines
21 KiB
C
731 lines
21 KiB
C
/*
|
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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) 1992-1993 The Regents of the University of California.
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* All rights reserved.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#ifndef lint
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static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkCanvBmap.c,v 1.12 93/09/15 08:19:47 ouster Exp $ SPRITE (Berkeley)";
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#endif
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#include <stdio.h>
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#include "tkInt.h"
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#include "tkConfig.h"
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#include "tkCanvas.h"
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/*
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* The structure below defines the record for each rectangle/oval 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
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* (x,y). */
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Pixmap bitmap; /* Bitmap to display in window. */
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XColor *fgColor; /* Foreground color to use for bitmap. */
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XColor *bgColor; /* Background color to use for bitmap. */
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GC gc; /* Graphics context to use for drawing
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* bitmap 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_ConfigSpec configSpecs[] = {
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{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
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"center", Tk_Offset(BitmapItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_COLOR, "-background", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(BitmapItem, bgColor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_BITMAP, "-bitmap", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(BitmapItem, bitmap), TK_CONFIG_NULL_OK},
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{TK_CONFIG_COLOR, "-foreground", (char *) NULL, (char *) NULL,
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"black", Tk_Offset(BitmapItem, fgColor), 0},
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{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
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(char *) NULL, 0, TK_CONFIG_NULL_OK, &tkCanvasTagsOption},
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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(char *) NULL, 0, 0}
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};
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/*
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* Prototypes for procedures defined in this file:
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*/
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static int BitmapCoords _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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Tk_Item *itemPtr, int argc, char **argv));
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static int BitmapToArea _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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Tk_Item *itemPtr, double *rectPtr));
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static double BitmapToPoint _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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Tk_Item *itemPtr, double *coordPtr));
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static int BitmapToPostscript _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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Tk_Item *itemPtr, Tk_PostscriptInfo *psInfoPtr));
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static void ComputeBitmapBbox _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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BitmapItem *bmapPtr));
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static int ConfigureBitmap _ANSI_ARGS_((
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Tk_Canvas *canvasPtr, Tk_Item *itemPtr, int argc,
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char **argv, int flags));
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static int CreateBitmap _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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struct Tk_Item *itemPtr, int argc, char **argv));
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static void DeleteBitmap _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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Tk_Item *itemPtr));
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static void DisplayBitmap _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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Tk_Item *itemPtr, Drawable dst));
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static void ScaleBitmap _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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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 _ANSI_ARGS_((Tk_Canvas *canvasPtr,
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Tk_Item *itemPtr, double deltaX, double deltaY));
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/*
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* The structures below defines the rectangle and oval item types
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* by means of procedures 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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CreateBitmap, /* 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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0, /* alwaysRedraw */
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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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(Tk_ItemIndexProc *) NULL, /* indexProc */
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(Tk_ItemCursorProc *) NULL, /* icursorProc */
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(Tk_ItemSelectionProc *) NULL, /* selectionProc */
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(Tk_ItemInsertProc *) NULL, /* insertProc */
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(Tk_ItemDCharsProc *) NULL, /* dTextProc */
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(Tk_ItemType *) NULL /* nextPtr */
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};
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/*
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*--------------------------------------------------------------
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*
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* CreateBitmap --
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*
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* This procedure is invoked to create a new bitmap
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* 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
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* creating the item, then an error message is left in
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* canvasPtr->interp->result; in this case itemPtr is
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* 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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CreateBitmap(canvasPtr, itemPtr, argc, argv)
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register Tk_Canvas *canvasPtr; /* Canvas to hold new item. */
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Tk_Item *itemPtr; /* Record to hold new item; header
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* has been initialized by caller. */
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int argc; /* Number of arguments in argv. */
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char **argv; /* Arguments describing rectangle. */
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{
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register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
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if (argc < 2) {
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Tcl_AppendResult(canvasPtr->interp, "wrong # args: should be \"",
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Tk_PathName(canvasPtr->tkwin), "\" create ",
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itemPtr->typePtr->name, " x y ?options?",
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(char *) NULL);
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return TCL_ERROR;
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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->fgColor = NULL;
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bmapPtr->bgColor = 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.
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*/
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if ((TkGetCanvasCoord(canvasPtr, argv[0], &bmapPtr->x) != TCL_OK)
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|| (TkGetCanvasCoord(canvasPtr, argv[1],
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&bmapPtr->y) != TCL_OK)) {
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return TCL_ERROR;
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}
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if (ConfigureBitmap(canvasPtr, itemPtr, argc-2, argv+2, 0) != TCL_OK) {
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DeleteBitmap(canvasPtr, itemPtr);
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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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* BitmapCoords --
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*
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* This procedure is invoked to process the "coords" widget
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* command on bitmap items. 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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* Returns TCL_OK or TCL_ERROR, and sets canvasPtr->interp->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(canvasPtr, itemPtr, argc, argv)
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register Tk_Canvas *canvasPtr; /* Canvas containing item. */
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Tk_Item *itemPtr; /* Item whose coordinates are to be
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* read or modified. */
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int argc; /* Number of coordinates supplied in
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* argv. */
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char **argv; /* Array of coordinates: x1, y1,
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* x2, y2, ... */
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{
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register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
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char x[TCL_DOUBLE_SPACE], y[TCL_DOUBLE_SPACE];
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if (argc == 0) {
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Tcl_PrintDouble(canvasPtr->interp, bmapPtr->x, x);
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Tcl_PrintDouble(canvasPtr->interp, bmapPtr->y, y);
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Tcl_AppendResult(canvasPtr->interp, x, " ", y, (char *) NULL);
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} else if (argc == 2) {
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if ((TkGetCanvasCoord(canvasPtr, argv[0], &bmapPtr->x) != TCL_OK)
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|| (TkGetCanvasCoord(canvasPtr, argv[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(canvasPtr, bmapPtr);
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} else {
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sprintf(canvasPtr->interp->result,
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"wrong # coordinates: expected 0 or 2, got %d",
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argc);
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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 procedure is invoked to configure various aspects
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* of a bitmap 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
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* an error message is left in canvasPtr->interp->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(canvasPtr, itemPtr, argc, argv, flags)
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Tk_Canvas *canvasPtr; /* Canvas containing itemPtr. */
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Tk_Item *itemPtr; /* Bitmap item to reconfigure. */
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int argc; /* Number of elements in argv. */
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char **argv; /* 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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register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
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XGCValues gcValues;
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GC newGC;
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if (Tk_ConfigureWidget(canvasPtr->interp, canvasPtr->tkwin,
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configSpecs, argc, argv, (char *) bmapPtr, flags) != TCL_OK) {
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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
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* that determine the graphics context.
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*/
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gcValues.foreground = bmapPtr->fgColor->pixel;
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if (bmapPtr->bgColor != NULL) {
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gcValues.background = bmapPtr->bgColor->pixel;
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} else {
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gcValues.background = Tk_3DBorderColor(canvasPtr->bgBorder)->pixel;
|
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}
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newGC = Tk_GetGC(canvasPtr->tkwin, GCForeground|GCBackground, &gcValues);
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if (bmapPtr->gc != None) {
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Tk_FreeGC(canvasPtr->display, bmapPtr->gc);
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}
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bmapPtr->gc = newGC;
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ComputeBitmapBbox(canvasPtr, bmapPtr);
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||
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return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
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||
* DeleteBitmap --
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||
*
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* This procedure is called to clean up the data structure
|
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* associated with a bitmap item.
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*
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* Results:
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||
* None.
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||
*
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||
* Side effects:
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||
* Resources associated with itemPtr are released.
|
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*
|
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*--------------------------------------------------------------
|
||
*/
|
||
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static void
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DeleteBitmap(canvasPtr, itemPtr)
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Tk_Canvas *canvasPtr; /* Info about overall canvas widget. */
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Tk_Item *itemPtr; /* Item that is being deleted. */
|
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{
|
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register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
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|
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if (bmapPtr->bitmap != None) {
|
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Tk_FreeBitmap(canvasPtr->display, bmapPtr->bitmap);
|
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}
|
||
if (bmapPtr->fgColor != NULL) {
|
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Tk_FreeColor(bmapPtr->fgColor);
|
||
}
|
||
if (bmapPtr->bgColor != NULL) {
|
||
Tk_FreeColor(bmapPtr->bgColor);
|
||
}
|
||
if (bmapPtr->gc != NULL) {
|
||
Tk_FreeGC(canvasPtr->display, bmapPtr->gc);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ComputeBitmapBbox --
|
||
*
|
||
* This procedure is invoked to compute the bounding box of
|
||
* all the pixels that may be drawn as part of a bitmap item.
|
||
* This procedure 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(canvasPtr, bmapPtr)
|
||
Tk_Canvas *canvasPtr; /* Canvas that contains item. */
|
||
register BitmapItem *bmapPtr; /* Item whose bbox is to be
|
||
* recomputed. */
|
||
{
|
||
unsigned int width, height;
|
||
int x, y;
|
||
|
||
x = bmapPtr->x + 0.5;
|
||
y = bmapPtr->y + 0.5;
|
||
|
||
if (bmapPtr->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(canvasPtr->display, bmapPtr->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 procedure 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 canvasPtr.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisplayBitmap(canvasPtr, itemPtr, drawable)
|
||
register Tk_Canvas *canvasPtr; /* Canvas that contains item. */
|
||
Tk_Item *itemPtr; /* Item to be displayed. */
|
||
Drawable drawable; /* Pixmap or window in which to draw
|
||
* item. */
|
||
{
|
||
register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||
|
||
if (bmapPtr->bitmap != None) {
|
||
XCopyPlane(Tk_Display(canvasPtr->tkwin), bmapPtr->bitmap, drawable,
|
||
bmapPtr->gc, 0, 0,
|
||
(unsigned int) bmapPtr->header.x2 - bmapPtr->header.x1,
|
||
(unsigned int) bmapPtr->header.y2 - bmapPtr->header.y1,
|
||
bmapPtr->header.x1 - canvasPtr->drawableXOrigin,
|
||
bmapPtr->header.y1 - canvasPtr->drawableYOrigin, 1);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* 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(canvasPtr, itemPtr, coordPtr)
|
||
Tk_Canvas *canvasPtr; /* Canvas containing item. */
|
||
Tk_Item *itemPtr; /* Item to check against point. */
|
||
double *coordPtr; /* Pointer to x and y coordinates. */
|
||
{
|
||
register 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 procedure 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(canvasPtr, itemPtr, rectPtr)
|
||
Tk_Canvas *canvasPtr; /* 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. */
|
||
{
|
||
register 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 procedure is invoked to rescale a rectangle or oval
|
||
* item.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The rectangle or oval 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(canvasPtr, itemPtr, originX, originY, scaleX, scaleY)
|
||
Tk_Canvas *canvasPtr; /* Canvas containing rectangle. */
|
||
Tk_Item *itemPtr; /* Rectangle to be scaled. */
|
||
double originX, originY; /* Origin about which to scale rect. */
|
||
double scaleX; /* Amount to scale in X direction. */
|
||
double scaleY; /* Amount to scale in Y direction. */
|
||
{
|
||
register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||
|
||
bmapPtr->x = originX + scaleX*(bmapPtr->x - originX);
|
||
bmapPtr->y = originY + scaleY*(bmapPtr->y - originY);
|
||
ComputeBitmapBbox(canvasPtr, bmapPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TranslateBitmap --
|
||
*
|
||
* This procedure is called to move a rectangle or oval by a
|
||
* given amount.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The position of the rectangle or oval is offset by
|
||
* (xDelta, yDelta), and the bounding box is updated in the
|
||
* generic part of the item structure.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
TranslateBitmap(canvasPtr, itemPtr, deltaX, deltaY)
|
||
Tk_Canvas *canvasPtr; /* Canvas containing item. */
|
||
Tk_Item *itemPtr; /* Item that is being moved. */
|
||
double deltaX, deltaY; /* Amount by which item is to be
|
||
* moved. */
|
||
{
|
||
register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||
|
||
bmapPtr->x += deltaX;
|
||
bmapPtr->y += deltaY;
|
||
ComputeBitmapBbox(canvasPtr, bmapPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* BitmapToPostscript --
|
||
*
|
||
* This procedure 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 canvasPtr->interp->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(canvasPtr, itemPtr, psInfoPtr)
|
||
Tk_Canvas *canvasPtr; /* Information about overall canvas. */
|
||
Tk_Item *itemPtr; /* Item for which Postscript is
|
||
* wanted. */
|
||
Tk_PostscriptInfo *psInfoPtr; /* Information about the Postscript;
|
||
* must be passed back to Postscript
|
||
* utility procedures. */
|
||
{
|
||
register BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
|
||
double x, y;
|
||
unsigned int width, height;
|
||
char buffer[200];
|
||
|
||
if (bmapPtr->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 = TkCanvPsY(psInfoPtr, bmapPtr->y);
|
||
Tk_SizeOfBitmap(canvasPtr->display, bmapPtr->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 (bmapPtr->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(canvasPtr->interp, buffer, (char *) NULL);
|
||
if (TkCanvPsColor(canvasPtr, psInfoPtr, bmapPtr->bgColor) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_AppendResult(canvasPtr->interp, "fill\n", (char *) NULL);
|
||
}
|
||
|
||
/*
|
||
* Draw the bitmap, if there is a foreground color.
|
||
*/
|
||
|
||
if (bmapPtr->fgColor != NULL) {
|
||
if (TkCanvPsColor(canvasPtr, psInfoPtr, bmapPtr->fgColor) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
sprintf(buffer, "%.15g %.15g translate\n %d %d true matrix {\n",
|
||
x, y, width, height);
|
||
Tcl_AppendResult(canvasPtr->interp, buffer, (char *) NULL);
|
||
if (TkCanvPsBitmap(canvasPtr, psInfoPtr, bmapPtr->bitmap) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_AppendResult(canvasPtr->interp, "\n} imagemask\n", (char *) NULL);
|
||
}
|
||
return TCL_OK;
|
||
}
|