1 files changed, 217 insertions, 0 deletions
diff --git a/tk/mac/tkMacRegion.c b/tk/mac/tkMacRegion.c
new file mode 100644
index 00000000000..7e9b4aa7565
--- /dev/null
+++ b/tk/mac/tkMacRegion.c
@@ -0,0 +1,217 @@
+/* 
+ * tkMacRegion.c --
+ *
+ *	Implements X window calls for manipulating regions
+ *
+ * Copyright (c) 1995-1996 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: @(#) $Id$
+ */
+
+#include "tkInt.h"
+#include "X.h"
+#include "Xlib.h"
+
+#include <Windows.h>
+#include <QDOffscreen.h>
+
+/*
+ * Temporary region that can be reused.
+ */
+static RgnHandle tmpRgn = NULL;
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkCreateRegion --
+ *
+ *	Implements the equivelent of the X window function
+ *	XCreateRegion.  See X window documentation for more details.
+ *
+ * Results:
+ *      Returns an allocated region handle.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+TkRegion
+TkCreateRegion()
+{
+    RgnHandle rgn;
+
+    rgn = NewRgn();
+    return (TkRegion) rgn;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkDestroyRegion --
+ *
+ *	Implements the equivelent of the X window function
+ *	XDestroyRegion.  See X window documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Memory is freed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+TkDestroyRegion(
+    TkRegion r)
+{
+    RgnHandle rgn = (RgnHandle) r;
+
+    DisposeRgn(rgn);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkIntersectRegion --
+ *
+ *	Implements the equivilent of the X window function
+ *	XIntersectRegion.  See X window documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+TkIntersectRegion(
+    TkRegion sra,
+    TkRegion srb,
+    TkRegion dr_return)
+{
+    RgnHandle srcRgnA = (RgnHandle) sra;
+    RgnHandle srcRgnB = (RgnHandle) srb;
+    RgnHandle destRgn = (RgnHandle) dr_return;
+
+    SectRgn(srcRgnA, srcRgnB, destRgn);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkUnionRectWithRegion --
+ *
+ *	Implements the equivelent of the X window function
+ *	XUnionRectWithRegion.  See X window documentation for more
+ *	details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+TkUnionRectWithRegion(
+    XRectangle* rectangle,
+    TkRegion src_region,
+    TkRegion dest_region_return)
+{
+    RgnHandle srcRgn = (RgnHandle) src_region;
+    RgnHandle destRgn = (RgnHandle) dest_region_return;
+
+    if (tmpRgn == NULL) {
+	tmpRgn = NewRgn();
+    }
+    SetRectRgn(tmpRgn, rectangle->x, rectangle->y,
+	    rectangle->x + rectangle->width, rectangle->y + rectangle->height);
+    UnionRgn(srcRgn, tmpRgn, destRgn);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkRectInRegion --
+ *
+ *	Implements the equivelent of the X window function
+ *	XRectInRegion.  See X window documentation for more details.
+ *
+ * Results:
+ *	Returns one of: RectangleOut, RectangleIn, RectanglePart.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int 
+TkRectInRegion(
+    TkRegion region,
+    int x,
+    int y,
+    unsigned int width,
+    unsigned int height)
+{
+    RgnHandle rgn = (RgnHandle) region;
+    RgnHandle rectRgn, destRgn;
+    int result;
+    
+    rectRgn = NewRgn();
+    destRgn = NewRgn();
+    SetRectRgn(rectRgn, x,  y, x + width, y + height);
+    SectRgn(rgn, rectRgn, destRgn);
+    if (EmptyRgn(destRgn)) {
+    	result = RectangleOut;
+    } else if (EqualRgn(rgn, destRgn)) {
+    	result = RectangleIn;
+    } else {
+    	result = RectanglePart;
+    }
+    DisposeRgn(rectRgn);
+    DisposeRgn(destRgn);
+    return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkClipBox --
+ *
+ *	Implements the equivelent of the X window function XClipBox.
+ *	See X window documentation for more details.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void 
+TkClipBox(
+    TkRegion r,
+    XRectangle* rect_return)
+{
+    RgnHandle rgn = (RgnHandle) r;
+
+    rect_return->x = (**rgn).rgnBBox.left;
+    rect_return->y = (**rgn).rgnBBox.top;
+    rect_return->width = (**rgn).rgnBBox.right - (**rgn).rgnBBox.left;
+    rect_return->height = (**rgn).rgnBBox.bottom - (**rgn).rgnBBox.top;
+}