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-rw-r--r--generic/tkCanvBmap.c519
1 files changed, 255 insertions, 264 deletions
diff --git a/generic/tkCanvBmap.c b/generic/tkCanvBmap.c
index cfef9b2..ad0b9cd 100644
--- a/generic/tkCanvBmap.c
+++ b/generic/tkCanvBmap.c
@@ -1,4 +1,4 @@
-/*
+/*
* tkCanvBmap.c --
*
* This file implements bitmap items for canvas widgets.
@@ -6,10 +6,10 @@
* 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.
+ * 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 1.11 2005/02/11 19:30:09 hobbs Exp $
+ * RCS: @(#) $Id: tkCanvBmap.c,v 1.12 2005/11/04 15:23:05 dkf Exp $
*/
#include <stdio.h>
@@ -23,11 +23,10 @@
typedef struct BitmapItem {
Tk_Item header; /* Generic stuff that's the same for all
- * types. MUST BE FIRST IN STRUCTURE. */
+ * 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). */
+ 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. */
@@ -37,8 +36,8 @@ typedef struct BitmapItem {
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. */
+ GC gc; /* Graphics context to use for drawing bitmap
+ * on screen. */
} BitmapItem;
/*
@@ -55,96 +54,95 @@ static Tk_CustomOption tagsOption = {
};
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,
+ {TK_CONFIG_COLOR, "-activebackground", NULL, NULL,
+ NULL, Tk_Offset(BitmapItem, activeBgColor), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_BITMAP, "-activebitmap", NULL, NULL,
+ NULL, Tk_Offset(BitmapItem, activeBitmap), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_COLOR, "-activeforeground", NULL, NULL,
+ NULL, Tk_Offset(BitmapItem, activeFgColor), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_ANCHOR, "-anchor", NULL, 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_COLOR, "-background", NULL, NULL,
+ NULL, Tk_Offset(BitmapItem, bgColor), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_BITMAP, "-bitmap", NULL, NULL,
+ NULL, Tk_Offset(BitmapItem, bitmap), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_COLOR, "-disabledbackground", NULL, NULL,
+ 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_BITMAP, "-disabledbitmap", NULL, NULL,
+ 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_COLOR, "-disabledforeground", NULL, NULL,
+ NULL, Tk_Offset(BitmapItem, disabledFgColor),
TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-foreground", (char *) NULL, (char *) NULL,
+ {TK_CONFIG_COLOR, "-foreground", NULL, 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,
+ {TK_CONFIG_CUSTOM, "-state", NULL, NULL,
+ 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}
+ {TK_CONFIG_CUSTOM, "-tags", NULL, NULL,
+ NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
+ {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}
};
/*
- * Prototypes for procedures defined in this file:
+ * Prototypes for functions defined in this file:
*/
-static int BitmapCoords _ANSI_ARGS_((Tcl_Interp *interp,
+static int BitmapCoords(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,
+ Tcl_Obj *CONST objv[]);
+static int BitmapToArea(Tk_Canvas canvas,
+ Tk_Item *itemPtr, double *rectPtr);
+static double BitmapToPoint(Tk_Canvas canvas,
+ Tk_Item *itemPtr, double *coordPtr);
+static int BitmapToPostscript(Tcl_Interp *interp,
+ Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
+static void ComputeBitmapBbox(Tk_Canvas canvas,
+ BitmapItem *bmapPtr);
+static int ConfigureBitmap(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,
+ Tcl_Obj *CONST objv[], int flags);
+static int TkcCreateBitmap(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,
+ int objc, Tcl_Obj *CONST objv[]);
+static void DeleteBitmap(Tk_Canvas canvas,
+ Tk_Item *itemPtr, Display *display);
+static void DisplayBitmap(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,
+ int x, int y, int width, int height);
+static void ScaleBitmap(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));
+ double scaleX, double scaleY);
+static void TranslateBitmap(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.
+ * The structures below defines the bitmap item type in terms of functions
+ * 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 */
+ "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 */
+ NULL, /* indexProc */
+ NULL, /* icursorProc */
+ NULL, /* selectionProc */
+ NULL, /* insertProc */
+ NULL, /* dTextProc */
+ NULL, /* nextPtr */
};
/*
@@ -152,14 +150,13 @@ Tk_ItemType tkBitmapType = {
*
* TkcCreateBitmap --
*
- * This procedure is invoked to create a new bitmap
- * item in a canvas.
+ * This function 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.
+ * 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.
@@ -168,13 +165,13 @@ Tk_ItemType tkBitmapType = {
*/
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. */
+TkcCreateBitmap(
+ 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;
@@ -200,8 +197,8 @@ TkcCreateBitmap(interp, canvas, itemPtr, objc, objv)
bmapPtr->gc = None;
/*
- * Process the arguments to fill in the item record.
- * Only 1 (list) or 2 (x y) coords are allowed.
+ * Process the arguments to fill in the item record. Only 1 (list) or 2 (x
+ * y) coords are allowed.
*/
if (objc == 1) {
@@ -221,7 +218,7 @@ TkcCreateBitmap(interp, canvas, itemPtr, objc, objv)
return TCL_OK;
}
- error:
+ error:
DeleteBitmap(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
return TCL_ERROR;
}
@@ -231,9 +228,8 @@ TkcCreateBitmap(interp, canvas, itemPtr, objc, objv)
*
* BitmapCoords --
*
- * This procedure is invoked to process the "coords" widget
- * command on bitmap items. See the user documentation for
- * details on what it does.
+ * This function 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.
@@ -245,20 +241,19 @@ TkcCreateBitmap(interp, canvas, itemPtr, objc, objv)
*/
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, ... */
+BitmapCoords(
+ 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);
@@ -299,12 +294,12 @@ BitmapCoords(interp, canvas, itemPtr, objc, objv)
*
* ConfigureBitmap --
*
- * This procedure is invoked to configure various aspects
- * of a bitmap item, such as its anchor position.
+ * This function 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.
+ * 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.
@@ -313,13 +308,13 @@ BitmapCoords(interp, canvas, itemPtr, objc, objv)
*/
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. */
+ConfigureBitmap(
+ 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;
@@ -338,8 +333,8 @@ ConfigureBitmap(interp, canvas, itemPtr, objc, objv, flags)
}
/*
- * A few of the options require additional processing, such as those
- * that determine the graphics context.
+ * A few of the options require additional processing, such as those that
+ * determine the graphics context.
*/
state = itemPtr->state;
@@ -412,8 +407,8 @@ ConfigureBitmap(interp, canvas, itemPtr, objc, objv, flags)
*
* DeleteBitmap --
*
- * This procedure is called to clean up the data structure
- * associated with a bitmap item.
+ * This function is called to clean up the data structure associated with
+ * a bitmap item.
*
* Results:
* None.
@@ -425,11 +420,10 @@ ConfigureBitmap(interp, canvas, itemPtr, objc, objv, flags)
*/
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. */
+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;
@@ -470,27 +464,24 @@ DeleteBitmap(canvas, itemPtr, display)
*
* 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.
+ * 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.
+ * 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. */
+ComputeBitmapBbox(
+ Tk_Canvas canvas, /* Canvas that contains item. */
+ BitmapItem *bmapPtr) /* Item whose bbox is to be recomputed. */
{
int width, height;
int x, y;
@@ -527,36 +518,36 @@ ComputeBitmapBbox(canvas, bmapPtr)
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;
+ 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;
}
/*
@@ -574,28 +565,27 @@ ComputeBitmapBbox(canvas, bmapPtr)
*
* DisplayBitmap --
*
- * This procedure is invoked to draw a bitmap item in a given
- * drawable.
+ * 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.
+ * 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). */
+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;
@@ -604,9 +594,8 @@ DisplayBitmap(canvas, itemPtr, display, drawable, x, y, width, height)
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 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) {
@@ -652,9 +641,9 @@ DisplayBitmap(canvas, itemPtr, display, drawable, x, y, width, height)
&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).
+ * 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,
@@ -671,14 +660,14 @@ DisplayBitmap(canvas, itemPtr, display, drawable, x, y, width, height)
*
* BitmapToPoint --
*
- * Computes the distance from a given point to a given
- * rectangle, in canvas units.
+ * 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.
+ * 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.
@@ -688,10 +677,10 @@ DisplayBitmap(canvas, itemPtr, display, drawable, x, y, width, height)
/* 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. */
+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;
@@ -729,14 +718,13 @@ BitmapToPoint(canvas, itemPtr, coordPtr)
*
* BitmapToArea --
*
- * This procedure is called to determine whether an item
- * lies entirely inside, entirely outside, or overlapping
- * a given rectangle.
+ * 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.
+ * -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.
@@ -746,12 +734,12 @@ BitmapToPoint(canvas, itemPtr, coordPtr)
/* 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. */
+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;
@@ -775,16 +763,16 @@ BitmapToArea(canvas, itemPtr, rectPtr)
*
* 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.
+ * 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:
+ * 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)
*
@@ -792,12 +780,13 @@ BitmapToArea(canvas, itemPtr, rectPtr)
*/
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. */
+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;
@@ -811,25 +800,24 @@ ScaleBitmap(canvas, itemPtr, originX, originY, scaleX, scaleY)
*
* TranslateBitmap --
*
- * This procedure is called to move an item by a given amount.
+ * 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.
+ * 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. */
+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;
@@ -843,15 +831,13 @@ TranslateBitmap(canvas, itemPtr, deltaX, deltaY)
*
* BitmapToPostscript --
*
- * This procedure is called to generate Postscript for
- * bitmap items.
+ * 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.
+ * 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.
@@ -860,15 +846,13 @@ TranslateBitmap(canvas, itemPtr, deltaX, deltaY)
*/
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. */
+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;
@@ -913,8 +897,8 @@ BitmapToPostscript(interp, canvas, itemPtr, prepass)
}
/*
- * Compute the coordinates of the lower-left corner of the bitmap,
- * taking into account the anchor position for the bitmp.
+ * Compute the coordinates of the lower-left corner of the bitmap, taking
+ * into account the anchor position for the bitmp.
*/
x = bmapPtr->x;
@@ -922,15 +906,15 @@ BitmapToPostscript(interp, canvas, itemPtr, prepass)
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;
+ 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;
}
/*
@@ -941,18 +925,18 @@ BitmapToPostscript(interp, canvas, itemPtr, prepass)
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);
+ Tcl_AppendResult(interp, buffer, NULL);
if (Tk_CanvasPsColor(interp, canvas, bgColor) != TCL_OK) {
return TCL_ERROR;
}
- Tcl_AppendResult(interp, "fill\n", (char *) NULL);
+ 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.
+ * 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) {
@@ -962,8 +946,7 @@ BitmapToPostscript(interp, canvas, itemPtr, prepass)
if (width > 60000) {
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "can't generate Postscript",
- " for bitmaps more than 60000 pixels wide",
- (char *) NULL);
+ " for bitmaps more than 60000 pixels wide", NULL);
return TCL_ERROR;
}
rowsAtOnce = 60000/width;
@@ -971,7 +954,7 @@ BitmapToPostscript(interp, canvas, itemPtr, prepass)
rowsAtOnce = 1;
}
sprintf(buffer, "%.15g %.15g translate\n", x, y+height);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
+ Tcl_AppendResult(interp, buffer, NULL);
for (curRow = 0; curRow < height; curRow += rowsAtOnce) {
rowsThisTime = rowsAtOnce;
if (rowsThisTime > (height - curRow)) {
@@ -979,13 +962,21 @@ BitmapToPostscript(interp, canvas, itemPtr, prepass)
}
sprintf(buffer, "0 -%.15g translate\n%d %d true matrix {\n",
(double) rowsThisTime, width, rowsThisTime);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
+ 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", (char *) NULL);
+ Tcl_AppendResult(interp, "\n} imagemask\n", NULL);
}
}
return TCL_OK;
}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */