1 files changed, 56 insertions, 0 deletions
diff --git a/sraRegion.h b/sraRegion.h
new file mode 100755
index 0000000..d0348cc
--- /dev/null
+++ b/sraRegion.h
@@ -0,0 +1,56 @@
+/* -=- SRA - Simple Region Algorithm
+ * A simple rectangular region implementation.
+ * Copyright (c) 2001 James "Wez" Weatherall, Johannes E. Schindelin
+ */
+
+/* -=- sraRect */
+
+typedef struct _rect {
+	int x1;
+	int y1;
+	int x2;
+	int y2;
+} sraRect;
+
+//struct sraRegion;
+typedef struct sraRegion sraRegion;
+
+/* -=- Region manipulation functions */
+
+extern sraRegion *sraRgnCreate();
+extern sraRegion *sraRgnCreateRect(int x1, int y1, int x2, int y2);
+extern sraRegion *sraRgnCreateRgn(const sraRegion *src);
+
+extern void sraRgnDestroy(sraRegion *rgn);
+extern void sraRgnMakeEmpty(sraRegion *rgn);
+extern Bool sraRgnAnd(sraRegion *dst, const sraRegion *src);
+extern void sraRgnOr(sraRegion *dst, const sraRegion *src);
+extern Bool sraRgnSubtract(sraRegion *dst, const sraRegion *src);
+
+extern void sraRgnOffset(sraRegion *dst, int dx, int dy);
+
+extern Bool sraRgnPopRect(sraRegion *region, sraRect *rect,
+			  unsigned long flags);
+
+extern unsigned long sraRgnCountRects(const sraRegion *rgn);
+extern Bool sraRgnEmpty(const sraRegion *rgn);
+
+/* -=- rectangle iterator */
+
+typedef struct sraRectangleIterator {
+  Bool reverseX,reverseY;
+  int ptrSize,ptrPos;
+  struct sraSpan** sPtrs;
+} sraRectangleIterator;
+
+extern sraRectangleIterator *sraRgnGetIterator(sraRegion *s);
+extern sraRectangleIterator *sraRgnGetReverseIterator(sraRegion *s,Bool reverseX,Bool reverseY);
+extern Bool sraRgnIteratorNext(sraRectangleIterator *i,sraRect *r);
+extern void sraRgnReleaseIterator(sraRectangleIterator *i);
+
+void sraRgnPrint(const sraRegion *s);
+
+/* -=- Rectangle clipper (for speed) */
+
+extern Bool sraClipRect(int *x, int *y, int *w, int *h,
+			int cx, int cy, int cw, int ch);