tkCanvBmap.c
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上传日期:2015-12-11
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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) 1994-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkCanvBmap.c,v 1.7.2.2 2005/02/11 19:27:52 hobbs Exp $
- */
- #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. */
- Pixmap activeBitmap; /* Bitmap to display in window. */
- Pixmap disabledBitmap; /* Bitmap to display in window. */
- XColor *fgColor; /* Foreground color to use for bitmap. */
- XColor *activeFgColor; /* Foreground color to use for bitmap. */
- XColor *disabledFgColor; /* Foreground color to use for bitmap. */
- XColor *bgColor; /* Background color to use for bitmap. */
- XColor *activeBgColor; /* Background color to use for bitmap. */
- XColor *disabledBgColor; /* 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 stateOption = {
- (Tk_OptionParseProc *) TkStateParseProc,
- TkStatePrintProc, (ClientData) 2
- };
- static Tk_CustomOption tagsOption = {
- (Tk_OptionParseProc *) Tk_CanvasTagsParseProc,
- Tk_CanvasTagsPrintProc, (ClientData) NULL
- };
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_COLOR, "-activebackground", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(BitmapItem, activeBgColor), TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-activebitmap", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(BitmapItem, activeBitmap), TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-activeforeground", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(BitmapItem, activeFgColor), TK_CONFIG_NULL_OK},
- {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, "-disabledbackground", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(BitmapItem, disabledBgColor),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-disabledbitmap", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(BitmapItem, disabledBitmap),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-disabledforeground", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(BitmapItem, disabledFgColor),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-foreground", (char *) NULL, (char *) NULL,
- "black", Tk_Offset(BitmapItem, fgColor), 0},
- {TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK,
- &stateOption},
- {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 objc,
- Tcl_Obj *CONST objv[]));
- 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 objc,
- Tcl_Obj *CONST objv[], int flags));
- static int TkcCreateBitmap _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, struct Tk_Item *itemPtr,
- int objc, Tcl_Obj *CONST objv[]));
- 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 */
- TkcCreateBitmap, /* createProc */
- configSpecs, /* configSpecs */
- ConfigureBitmap, /* configureProc */
- BitmapCoords, /* coordProc */
- DeleteBitmap, /* deleteProc */
- DisplayBitmap, /* displayProc */
- TK_CONFIG_OBJS, /* flags */
- 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 */
- };
- /*
- *--------------------------------------------------------------
- *
- * TkcCreateBitmap --
- *
- * 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
- * the interp's 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
- TkcCreateBitmap(interp, canvas, itemPtr, objc, objv)
- 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 objc; /* Number of arguments in objv. */
- Tcl_Obj *CONST objv[]; /* Arguments describing rectangle. */
- {
- BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
- int i;
- if (objc == 0) {
- Tcl_Panic("canvas did not pass any coordsn");
- }
- /*
- * Initialize item's record.
- */
- bmapPtr->anchor = TK_ANCHOR_CENTER;
- bmapPtr->bitmap = None;
- bmapPtr->activeBitmap = None;
- bmapPtr->disabledBitmap = None;
- bmapPtr->fgColor = NULL;
- bmapPtr->activeFgColor = NULL;
- bmapPtr->disabledFgColor = NULL;
- bmapPtr->bgColor = NULL;
- bmapPtr->activeBgColor = NULL;
- bmapPtr->disabledBgColor = NULL;
- bmapPtr->gc = None;
- /*
- * Process the arguments to fill in the item record.
- * Only 1 (list) or 2 (x y) coords are allowed.
- */
- if (objc == 1) {
- i = 1;
- } else {
- char *arg = Tcl_GetString(objv[1]);
- i = 2;
- if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) {
- i = 1;
- }
- }
- if (BitmapCoords(interp, canvas, itemPtr, i, objv) != TCL_OK) {
- goto error;
- }
- if (ConfigureBitmap(interp, canvas, itemPtr, objc-i, objv+i, 0)
- == TCL_OK) {
- return TCL_OK;
- }
- error:
- DeleteBitmap(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
- return TCL_ERROR;
- }
- /*
- *--------------------------------------------------------------
- *
- * 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 the interp's result.
- *
- * Side effects:
- * The coordinates for the given item may be changed.
- *
- *--------------------------------------------------------------
- */
- static int
- BitmapCoords(interp, canvas, itemPtr, objc, objv)
- 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 objc; /* Number of coordinates supplied in
- * objv. */
- Tcl_Obj *CONST objv[]; /* Array of coordinates: x1, y1,
- * x2, y2, ... */
- {
- BitmapItem *bmapPtr = (BitmapItem *) itemPtr;
- if (objc == 0) {
- Tcl_Obj *obj = Tcl_NewObj();
- Tcl_Obj *subobj = Tcl_NewDoubleObj(bmapPtr->x);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- subobj = Tcl_NewDoubleObj(bmapPtr->y);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- Tcl_SetObjResult(interp, obj);
- } else if (objc < 3) {
- if (objc == 1) {
- if (Tcl_ListObjGetElements(interp, objv[0], &objc,
- (Tcl_Obj ***) &objv) != TCL_OK) {
- return TCL_ERROR;
- } else if (objc != 2) {
- char buf[64 + TCL_INTEGER_SPACE];
- sprintf(buf, "wrong # coordinates: expected 2, got %d", objc);
- Tcl_SetResult(interp, buf, TCL_VOLATILE);
- return TCL_ERROR;
- }
- }
- if ((Tk_CanvasGetCoordFromObj(interp, canvas, objv[0],
- &bmapPtr->x) != TCL_OK)
- || (Tk_CanvasGetCoordFromObj(interp, canvas, objv[1],
- &bmapPtr->y) != TCL_OK)) {
- return TCL_ERROR;
- }
- ComputeBitmapBbox(canvas, bmapPtr);
- } else {
- char buf[64 + TCL_INTEGER_SPACE];
- sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", objc);
- Tcl_SetResult(interp, buf, TCL_VOLATILE);
- 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 the interp's result.
- *
- * Side effects:
- * Configuration information may be set for itemPtr.
- *
- *--------------------------------------------------------------
- */
- static int
- ConfigureBitmap(interp, canvas, itemPtr, objc, objv, flags)
- Tcl_Interp *interp; /* Used for error reporting. */
- Tk_Canvas canvas; /* Canvas containing itemPtr. */
- Tk_Item *itemPtr; /* Bitmap item to reconfigure. */
- int objc; /* Number of elements in objv. */
- Tcl_Obj *CONST objv[]; /* 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;
- XColor *fgColor;
- XColor *bgColor;
- Pixmap bitmap;
- Tk_State state;
- tkwin = Tk_CanvasTkwin(canvas);
- if (TCL_OK != Tk_ConfigureWidget(interp, tkwin, configSpecs, objc,
- (CONST char **) objv, (char *) bmapPtr, flags|TK_CONFIG_OBJS)) {
- return TCL_ERROR;
- }
- /*
- * A few of the options require additional processing, such as those
- * that determine the graphics context.
- */
- state = itemPtr->state;
- if (bmapPtr->activeFgColor!=NULL ||
- bmapPtr->activeBgColor!=NULL ||
- bmapPtr->activeBitmap!=None) {
- itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
- } else {
- itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
- }
- if (state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- if (state == TK_STATE_HIDDEN) {
- ComputeBitmapBbox(canvas, bmapPtr);
- return TCL_OK;
- }
- 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) {
- 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 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->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 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;
- 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 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;
- 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(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 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(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[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 %sn",
- x, y, width, height, -width, "0 rlineto closepath");
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- if (Tk_CanvasPsColor(interp, canvas, bgColor) != TCL_OK) {
- return TCL_ERROR;
- }
- Tcl_AppendResult(interp, "filln", (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 (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",
- (char *) NULL);
- return TCL_ERROR;
- }
- rowsAtOnce = 60000/width;
- if (rowsAtOnce < 1) {
- rowsAtOnce = 1;
- }
- sprintf(buffer, "%.15g %.15g translaten", 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 translaten%d %d true matrix {n",
- (double) rowsThisTime, width, rowsThisTime);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- if (Tk_CanvasPsBitmap(interp, canvas, bitmap,
- 0, curRow, width, rowsThisTime) != TCL_OK) {
- return TCL_ERROR;
- }
- Tcl_AppendResult(interp, "n} imagemaskn", (char *) NULL);
- }
- }
- return TCL_OK;
- }