Import Tk 8.5.15 (as of svn r89086)

macosx/tkMacOSXRegion.c

@@ -0,0 +1,559 @@
+/*
+ * tkMacOSXRegion.c --
+ *
+ *	Implements X window calls for manipulating regions
+ *
+ * Copyright (c) 1995-1996 Sun Microsystems, Inc.
+ * Copyright 2001-2009, Apple Inc.
+ * Copyright (c) 2006-2009 Daniel A. Steffen <das@users.sourceforge.net>
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tkMacOSXPrivate.h"
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkCreateRegion --
+ *
+ *	Implements the equivelent of the X window function XCreateRegion. See
+ *	Xwindow documentation for more details.
+ *
+ * Results:
+ *	Returns an allocated region handle.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+TkRegion
+TkCreateRegion(void)
+{
+    return (TkRegion) HIShapeCreateMutable();
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkDestroyRegion --
+ *
+ *	Implements the equivelent of the X window function XDestroyRegion. See
+ *	Xwindow documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Memory is freed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkDestroyRegion(
+    TkRegion r)
+{
+    if (r) {
+	CFRelease(r);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkIntersectRegion --
+ *
+ *	Implements the equivalent of the X window function XIntersectRegion.
+ *	See Xwindow documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkIntersectRegion(
+    TkRegion sra,
+    TkRegion srb,
+    TkRegion dr_return)
+{
+    ChkErr(HIShapeIntersect, (HIShapeRef) sra, (HIShapeRef) srb,
+	   (HIMutableShapeRef) dr_return);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkSubtractRegion --
+ *
+ *	Implements the equivalent of the X window function XSubtractRegion.
+ *	See X window documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkSubtractRegion(
+    TkRegion sra,
+    TkRegion srb,
+    TkRegion dr_return)
+{
+    ChkErr(HIShapeDifference, (HIShapeRef) sra, (HIShapeRef) srb,
+	   (HIMutableShapeRef) dr_return);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkUnionRectWithRegion --
+ *
+ *	Implements the equivelent of the X window function
+ *	XUnionRectWithRegion. See Xwindow documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkUnionRectWithRegion(
+    XRectangle* rectangle,
+    TkRegion src_region,
+    TkRegion dest_region_return)
+{
+    const CGRect r = CGRectMake(rectangle->x, rectangle->y,
+	    rectangle->width, rectangle->height);
+
+    if (src_region == dest_region_return) {
+	ChkErr(TkMacOSHIShapeUnionWithRect,
+		(HIMutableShapeRef) dest_region_return, &r);
+    } else {
+	HIShapeRef rectRgn = HIShapeCreateWithRect(&r);
+
+	ChkErr(TkMacOSHIShapeUnion, rectRgn, (HIShapeRef) src_region,
+		(HIMutableShapeRef) dest_region_return);
+	CFRelease(rectRgn);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkRectInRegion --
+ *
+ *	Implements the equivelent of the X window function XRectInRegion. See
+ *	Xwindow documentation for more details.
+ *
+ * Results:
+ *	Returns RectanglePart or RectangleOut. Note that this is not a
+ *	complete implementation since it doesn't test for RectangleIn.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TkRectInRegion(
+    TkRegion region,
+    int x,
+    int y,
+    unsigned int width,
+    unsigned int height)
+{
+    int result;
+    const CGRect r = CGRectMake(x, y, width, height);
+
+    result = HIShapeIntersectsRect((HIShapeRef) region, &r) ?
+	    RectanglePart : RectangleOut;
+    return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkClipBox --
+ *
+ *	Implements the equivelent of the X window function XClipBox. See
+ *	Xwindow documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkClipBox(
+    TkRegion r,
+    XRectangle* rect_return)
+{
+    CGRect rect;
+
+    HIShapeGetBounds((HIShapeRef) r, &rect);
+    rect_return->x = rect.origin.x;
+    rect_return->y = rect.origin.y;
+    rect_return->width = rect.size.width;
+    rect_return->height = rect.size.height;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpBuildRegionFromAlphaData --
+ *
+ *	Set up a rectangle of the given region based on the supplied alpha
+ *	data.
+ *
+ * Results:
+ *	None
+ *
+ * Side effects:
+ *	The region is updated, with extra pixels added to it.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpBuildRegionFromAlphaData(
+    TkRegion region,			/* Region to update. */
+    unsigned int x,			/* Where in region to update. */
+    unsigned int y,			/* Where in region to update. */
+    unsigned int width,			/* Size of rectangle to update. */
+    unsigned int height,		/* Size of rectangle to update. */
+    unsigned char *dataPtr,		/* Data to read from. */
+    unsigned int pixelStride,		/* num bytes from one piece of alpha
+					 * data to the next in the line. */
+    unsigned int lineStride)		/* num bytes from one line of alpha
+					 * data to the next line. */
+{
+    unsigned char *lineDataPtr;
+    unsigned int x1, y1, end;
+    XRectangle rect;
+
+    for (y1 = 0; y1 < height; y1++) {
+	lineDataPtr = dataPtr;
+	for (x1 = 0; x1 < width; x1 = end) {
+	    /*
+	     * Search for first non-transparent pixel.
+	     */
+
+	    while ((x1 < width) && !*lineDataPtr) {
+		x1++;
+		lineDataPtr += pixelStride;
+	    }
+	    end = x1;
+
+	    /*
+	     * Search for first transparent pixel.
+	     */
+
+	    while ((end < width) && *lineDataPtr) {
+		end++;
+		lineDataPtr += pixelStride;
+	    }
+	    if (end > x1) {
+		rect.x = x + x1;
+		rect.y = y + y1;
+		rect.width = end - x1;
+		rect.height = 1;
+		TkUnionRectWithRegion(&rect, region, region);
+	    }
+	}
+	dataPtr += lineStride;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpRetainRegion --
+ *
+ *	Increases reference count of region.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpRetainRegion(
+    TkRegion r)
+{
+    CFRetain(r);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpReleaseRegion --
+ *
+ *	Decreases reference count of region.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	May free memory.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpReleaseRegion(
+    TkRegion r)
+{
+    CFRelease(r);
+}
+#if 0
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXEmtpyRegion --
+ *
+ *	Set region to emtpy.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacOSXEmtpyRegion(
+    TkRegion r)
+{
+    ChkErr(HIShapeSetEmpty, (HIMutableShapeRef) r);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXIsEmptyRegion --
+ *
+ *	Return native region for given tk region.
+ *
+ * Results:
+ *	1 if empty, 0 otherwise.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TkMacOSXIsEmptyRegion(
+    TkRegion r)
+{
+    return HIShapeIsEmpty((HIMutableShapeRef) r) ? 1 : 0;
+}
+#endif
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXGetNativeRegion --
+ *
+ *	Return native region for given tk region.
+ *
+ * Results:
+ *	Native region, CFRelease when done.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+HIShapeRef
+TkMacOSXGetNativeRegion(
+    TkRegion r)
+{
+    return (HIShapeRef) CFRetain(r);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXSetWithNativeRegion --
+ *
+ *	Set region to the native region.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacOSXSetWithNativeRegion(
+    TkRegion r,
+    HIShapeRef rgn)
+{
+    ChkErr(TkMacOSXHIShapeSetWithShape, (HIMutableShapeRef) r, rgn);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXOffsetRegion --
+ *
+ *	Offsets region by given distances.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkMacOSXOffsetRegion(
+    TkRegion r,
+    short dx,
+    short dy)
+{
+    ChkErr(HIShapeOffset, (HIMutableShapeRef) r, dx, dy);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXHIShapeCreateEmpty, TkMacOSXHIShapeCreateMutableWithRect,
+ * TkMacOSXHIShapeSetWithShape, TkMacOSXHIShapeSetWithRect,
+ * TkMacOSHIShapeDifferenceWithRect, TkMacOSHIShapeUnionWithRect,
+ * TkMacOSHIShapeUnion --
+ *
+ *	Wrapper functions for missing/buggy HIShape API
+ *
+ *----------------------------------------------------------------------
+ */
+
+HIShapeRef
+TkMacOSXHIShapeCreateEmpty(void)
+{
+    HIShapeRef result;
+
+    result = HIShapeCreateEmpty();
+    return result;
+}
+
+HIMutableShapeRef
+TkMacOSXHIShapeCreateMutableWithRect(
+    const CGRect *inRect)
+{
+    HIMutableShapeRef result;
+
+    result = HIShapeCreateMutableWithRect(inRect);
+    return result;
+}
+
+OSStatus
+TkMacOSXHIShapeSetWithShape(
+    HIMutableShapeRef inDestShape,
+    HIShapeRef inSrcShape)
+{
+    OSStatus result;
+
+    result = HIShapeSetWithShape(inDestShape, inSrcShape);
+    return result;
+}
+
+#if 0
+OSStatus
+TkMacOSXHIShapeSetWithRect(
+    HIMutableShapeRef inShape,
+    const CGRect *inRect)
+{
+    OSStatus result;
+    HIShapeRef rgn = HIShapeCreateWithRect(inRect);
+
+    result = TkMacOSXHIShapeSetWithShape(inShape, rgn);
+    CFRelease(rgn);
+
+    return result;
+}
+#endif
+
+OSStatus
+TkMacOSHIShapeDifferenceWithRect(
+    HIMutableShapeRef inShape,
+    const CGRect *inRect)
+{
+    OSStatus result;
+    HIShapeRef rgn = HIShapeCreateWithRect(inRect);
+
+    result = HIShapeDifference(inShape, rgn, inShape);
+    CFRelease(rgn);
+
+    return result;
+}
+
+OSStatus
+TkMacOSHIShapeUnionWithRect(
+    HIMutableShapeRef inShape,
+    const CGRect *inRect)
+{
+    OSStatus result;
+
+    result = HIShapeUnionWithRect(inShape, inRect);
+    return result;
+}
+
+OSStatus
+TkMacOSHIShapeUnion(
+    HIShapeRef inShape1,
+    HIShapeRef inShape2,
+    HIMutableShapeRef outResult)
+{
+    OSStatus result;
+
+    result = HIShapeUnion(inShape1, inShape2, outResult);
+    return result;
+}
+
+/*
+ * Local Variables:
+ * mode: objc
+ * c-basic-offset: 4
+ * fill-column: 79
+ * coding: utf-8
+ * End:
+ */