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diff --git a/generic/tkCanvBmap.c b/generic/tkCanvBmap.c
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+/*
+ * tkCanvBmap.c --
+ *
+ * This file implements bitmap items for canvas widgets.
+ *
+ * Copyright (c) 1992-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkCanvBmap.c 1.30 96/05/03 10:49:00
+ */
+
+#include <stdio.h>
+#include "tkInt.h"
+#include "tkPort.h"
+#include "tkCanvas.h"
+
+/*
+ * The structure below defines the record for each bitmap item.
+ */
+
+typedef struct BitmapItem {
+ Tk_Item header; /* Generic stuff that's the same for all
+ * types. MUST BE FIRST IN STRUCTURE. */
+ double x, y; /* Coordinates of positioning point for
+ * bitmap. */
+ Tk_Anchor anchor; /* Where to anchor bitmap relative to
+ * (x,y). */
+ Pixmap bitmap; /* Bitmap to display in window. */
+ XColor *fgColor; /* Foreground color to use for bitmap. */
+ XColor *bgColor; /* Background color to use for bitmap. */
+ GC gc; /* Graphics context to use for drawing
+ * bitmap on screen. */
+} BitmapItem;
+
+/*
+ * Information used for parsing configuration specs:
+ */
+
+static Tk_CustomOption tagsOption = {Tk_CanvasTagsParseProc,
+ Tk_CanvasTagsPrintProc, (ClientData) NULL
+};
+
+static Tk_ConfigSpec configSpecs[] = {
+ {TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
+ "center", Tk_Offset(BitmapItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
+ {TK_CONFIG_COLOR, "-background", (char *) NULL, (char *) NULL,
+ (char *) NULL, Tk_Offset(BitmapItem, bgColor), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_BITMAP, "-bitmap", (char *) NULL, (char *) NULL,
+ (char *) NULL, Tk_Offset(BitmapItem, bitmap), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_COLOR, "-foreground", (char *) NULL, (char *) NULL,
+ "black", Tk_Offset(BitmapItem, fgColor), 0},
+ {TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
+ (char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
+ {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
+ (char *) NULL, 0, 0}
+};
+
+/*
+ * Prototypes for procedures defined in this file:
+ */
+
+static int BitmapCoords _ANSI_ARGS_((Tcl_Interp *interp,
+ Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
+ char **argv));
+static int BitmapToArea _ANSI_ARGS_((Tk_Canvas canvas,
+ Tk_Item *itemPtr, double *rectPtr));
+static double BitmapToPoint _ANSI_ARGS_((Tk_Canvas canvas,
+ Tk_Item *itemPtr, double *coordPtr));
+static int BitmapToPostscript _ANSI_ARGS_((Tcl_Interp *interp,
+ Tk_Canvas canvas, Tk_Item *itemPtr, int prepass));
+static void ComputeBitmapBbox _ANSI_ARGS_((Tk_Canvas canvas,
+ BitmapItem *bmapPtr));
+static int ConfigureBitmap _ANSI_ARGS_((Tcl_Interp *interp,
+ Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
+ char **argv, int flags));
+static int CreateBitmap _ANSI_ARGS_((Tcl_Interp *interp,
+ Tk_Canvas canvas, struct Tk_Item *itemPtr,
+ int argc, char **argv));
+static void DeleteBitmap _ANSI_ARGS_((Tk_Canvas canvas,
+ Tk_Item *itemPtr, Display *display));
+static void DisplayBitmap _ANSI_ARGS_((Tk_Canvas canvas,
+ Tk_Item *itemPtr, Display *display, Drawable dst,
+ int x, int y, int width, int height));
+static void ScaleBitmap _ANSI_ARGS_((Tk_Canvas canvas,
+ Tk_Item *itemPtr, double originX, double originY,
+ double scaleX, double scaleY));
+static void TranslateBitmap _ANSI_ARGS_((Tk_Canvas canvas,
+ Tk_Item *itemPtr, double deltaX, double deltaY));
+
+/*
+ * The structures below defines the bitmap item type in terms of
+ * procedures that can be invoked by generic item code.
+ */
+
+Tk_ItemType tkBitmapType = {
+ "bitmap", /* name */
+ sizeof(BitmapItem), /* itemSize */
+ CreateBitmap, /* createProc */
+ configSpecs, /* configSpecs */
+ ConfigureBitmap, /* configureProc */
+ BitmapCoords, /* coordProc */
+ DeleteBitmap, /* deleteProc */
+ DisplayBitmap, /* displayProc */
+ 0, /* alwaysRedraw */
+ BitmapToPoint, /* pointProc */
+ BitmapToArea, /* areaProc */
+ BitmapToPostscript, /* postscriptProc */
+ ScaleBitmap, /* scaleProc */
+ TranslateBitmap, /* translateProc */
+ (Tk_ItemIndexProc *) NULL, /* indexProc */
+ (Tk_ItemCursorProc *) NULL, /* icursorProc */
+ (Tk_ItemSelectionProc *) NULL, /* selectionProc */
+ (Tk_ItemInsertProc *) NULL, /* insertProc */
+ (Tk_ItemDCharsProc *) NULL, /* dTextProc */
+ (Tk_ItemType *) NULL /* nextPtr */
+};
+
+/*
+ *--------------------------------------------------------------
+ *
+ * CreateBitmap --
+ *
+ * This procedure is invoked to create a new bitmap
+ * item in a canvas.
+ *
+ * Results:
+ * A standard Tcl return value. If an error occurred in
+ * creating the item, then an error message is left in
+ * interp->result; in this case itemPtr is left uninitialized,
+ * so it can be safely freed by the caller.
+ *
+ * Side effects:
+ * A new bitmap item is created.
+ *
+ *--------------------------------------------------------------
+ */
+
+static int
+CreateBitmap(interp, canvas, itemPtr, argc, argv)
+ Tcl_Interp *interp; /* Interpreter for error reporting. */
+ Tk_Canvas canvas; /* Canvas to hold new item. */
+ Tk_Item *itemPtr; /* Record to hold new item; header
+ * has been initialized by caller. */
+ int argc; /* Number of arguments in argv. */
+ char **argv; /* Arguments describing rectangle. */
+{
+ BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
+
+ if (argc < 2) {
+ Tcl_AppendResult(interp, "wrong # args: should be \"",
+ Tk_PathName(Tk_CanvasTkwin(canvas)), " create ",
+ itemPtr->typePtr->name, " x y ?options?\"",
+ (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ /*
+ * Initialize item's record.
+ */
+
+ bmapPtr->anchor = TK_ANCHOR_CENTER;
+ bmapPtr->bitmap = None;
+ bmapPtr->fgColor = NULL;
+ bmapPtr->bgColor = NULL;
+ bmapPtr->gc = None;
+
+ /*
+ * Process the arguments to fill in the item record.
+ */
+
+ if ((Tk_CanvasGetCoord(interp, canvas, argv[0], &bmapPtr->x) != TCL_OK)
+ || (Tk_CanvasGetCoord(interp, canvas, argv[1], &bmapPtr->y)
+ != TCL_OK)) {
+ return TCL_ERROR;
+ }
+
+ if (ConfigureBitmap(interp, canvas, itemPtr, argc-2, argv+2, 0) != TCL_OK) {
+ DeleteBitmap(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
+ return TCL_ERROR;
+ }
+ return TCL_OK;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * BitmapCoords --
+ *
+ * This procedure is invoked to process the "coords" widget
+ * command on bitmap items. See the user documentation for
+ * details on what it does.
+ *
+ * Results:
+ * Returns TCL_OK or TCL_ERROR, and sets interp->result.
+ *
+ * Side effects:
+ * The coordinates for the given item may be changed.
+ *
+ *--------------------------------------------------------------
+ */
+
+static int
+BitmapCoords(interp, canvas, itemPtr, argc, argv)
+ Tcl_Interp *interp; /* Used for error reporting. */
+ Tk_Canvas canvas; /* Canvas containing item. */
+ Tk_Item *itemPtr; /* Item whose coordinates are to be
+ * read or modified. */
+ int argc; /* Number of coordinates supplied in
+ * argv. */
+ char **argv; /* Array of coordinates: x1, y1,
+ * x2, y2, ... */
+{
+ BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
+ char x[TCL_DOUBLE_SPACE], y[TCL_DOUBLE_SPACE];
+
+ if (argc == 0) {
+ Tcl_PrintDouble(interp, bmapPtr->x, x);
+ Tcl_PrintDouble(interp, bmapPtr->y, y);
+ Tcl_AppendResult(interp, x, " ", y, (char *) NULL);
+ } else if (argc == 2) {
+ if ((Tk_CanvasGetCoord(interp, canvas, argv[0], &bmapPtr->x) != TCL_OK)
+ || (Tk_CanvasGetCoord(interp, canvas, argv[1], &bmapPtr->y)
+ != TCL_OK)) {
+ return TCL_ERROR;
+ }
+ ComputeBitmapBbox(canvas, bmapPtr);
+ } else {
+ sprintf(interp->result,
+ "wrong # coordinates: expected 0 or 2, got %d", argc);
+ return TCL_ERROR;
+ }
+ return TCL_OK;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ConfigureBitmap --
+ *
+ * This procedure is invoked to configure various aspects
+ * of a bitmap item, such as its anchor position.
+ *
+ * Results:
+ * A standard Tcl result code. If an error occurs, then
+ * an error message is left in interp->result.
+ *
+ * Side effects:
+ * Configuration information may be set for itemPtr.
+ *
+ *--------------------------------------------------------------
+ */
+
+static int
+ConfigureBitmap(interp, canvas, itemPtr, argc, argv, flags)
+ Tcl_Interp *interp; /* Used for error reporting. */
+ Tk_Canvas canvas; /* Canvas containing itemPtr. */
+ Tk_Item *itemPtr; /* Bitmap item to reconfigure. */
+ int argc; /* Number of elements in argv. */
+ char **argv; /* Arguments describing things to configure. */
+ int flags; /* Flags to pass to Tk_ConfigureWidget. */
+{
+ BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
+ XGCValues gcValues;
+ GC newGC;
+ Tk_Window tkwin;
+ unsigned long mask;
+
+ tkwin = Tk_CanvasTkwin(canvas);
+ if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, argv,
+ (char *) bmapPtr, flags) != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * A few of the options require additional processing, such as those
+ * that determine the graphics context.
+ */
+
+ gcValues.foreground = bmapPtr->fgColor->pixel;
+ mask = GCForeground;
+ if (bmapPtr->bgColor != NULL) {
+ gcValues.background = bmapPtr->bgColor->pixel;
+ mask |= GCBackground;
+ } else {
+ gcValues.clip_mask = bmapPtr->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 procedure 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(canvas, itemPtr, display)
+ 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->fgColor != NULL) {
+ Tk_FreeColor(bmapPtr->fgColor);
+ }
+ if (bmapPtr->bgColor != NULL) {
+ Tk_FreeColor(bmapPtr->bgColor);
+ }
+ if (bmapPtr->gc != NULL) {
+ Tk_FreeGC(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(canvas, bmapPtr)
+ Tk_Canvas canvas; /* Canvas that contains item. */
+ BitmapItem *bmapPtr; /* Item whose bbox is to be
+ * recomputed. */
+{
+ int width, height;
+ int x, y;
+
+ x = (int) (bmapPtr->x + ((bmapPtr->x >= 0) ? 0.5 : - 0.5));
+ y = (int) (bmapPtr->y + ((bmapPtr->y >= 0) ? 0.5 : - 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(Tk_Display(Tk_CanvasTkwin(canvas)), 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 canvas.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+DisplayBitmap(canvas, itemPtr, display, drawable, x, y, width, height)
+ 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, y, width, height; /* Describes region of canvas that
+ * must be redisplayed (not used). */
+{
+ BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
+ int bmapX, bmapY, bmapWidth, bmapHeight;
+ short drawableX, drawableY;
+
+ /*
+ * If the area being displayed doesn't cover the whole bitmap,
+ * then only redisplay the part of the bitmap that needs
+ * redisplay.
+ */
+
+ if (bmapPtr->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, bmapPtr->bitmap, drawable,
+ bmapPtr->gc, bmapX, bmapY, (unsigned int) bmapWidth,
+ (unsigned int) bmapHeight, drawableX, drawableY, 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(canvas, itemPtr, coordPtr)
+ 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 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(canvas, itemPtr, rectPtr)
+ 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 procedure is invoked to rescale a bitmap item in a
+ * canvas. It is one of the standard item procedures 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(canvas, itemPtr, originX, originY, scaleX, scaleY)
+ Tk_Canvas canvas; /* Canvas containing rectangle. */
+ Tk_Item *itemPtr; /* Rectangle to be scaled. */
+ double originX, 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 procedure 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(canvas, itemPtr, deltaX, deltaY)
+ Tk_Canvas canvas; /* Canvas containing item. */
+ Tk_Item *itemPtr; /* Item that is being moved. */
+ double deltaX, deltaY; /* Amount by which item is to be
+ * moved. */
+{
+ BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
+
+ bmapPtr->x += deltaX;
+ bmapPtr->y += deltaY;
+ ComputeBitmapBbox(canvas, 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 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(interp, canvas, itemPtr, prepass)
+ 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[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 = Tk_CanvasPsY(canvas, bmapPtr->y);
+ Tk_SizeOfBitmap(Tk_Display(Tk_CanvasTkwin(canvas)), 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(interp, buffer, (char *) NULL);
+ if (Tk_CanvasPsColor(interp, canvas, bmapPtr->bgColor) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ Tcl_AppendResult(interp, "fill\n", (char *) 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 (bmapPtr->fgColor != NULL) {
+ if (Tk_CanvasPsColor(interp, canvas, bmapPtr->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",
+ (char *) 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, (char *) 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, (char *) NULL);
+ if (Tk_CanvasPsBitmap(interp, canvas, bmapPtr->bitmap,
+ 0, curRow, width, rowsThisTime) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ Tcl_AppendResult(interp, "\n} imagemask\n", (char *) NULL);
+ }
+ }
+ return TCL_OK;
+}