add clipstack to canvas. not used yet, but will be for devices (e.g. gpu) that
want to see how the clip was built
git-svn-id: http://skia.googlecode.com/svn/trunk@824 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/core/SkClipStack.h b/include/core/SkClipStack.h
new file mode 100644
index 0000000..bd64d66
--- /dev/null
+++ b/include/core/SkClipStack.h
@@ -0,0 +1,65 @@
+#ifndef SkClipStack_DEFINED
+#define SkClipStack_DEFINED
+
+#include "SkDeque.h"
+#include "SkRegion.h"
+
+class SkRect;
+class SkPath;
+
+class SkClipStack {
+public:
+ SkClipStack();
+ ~SkClipStack() {}
+
+ void reset();
+
+ int getSaveCount() const { return fSaveCount; }
+ void save();
+ void restore();
+
+ void clipDevRect(const SkIRect& ir,
+ SkRegion::Op op = SkRegion::kIntersect_Op) {
+ SkRect r;
+ r.set(ir);
+ this->clipDevRect(r, op);
+ }
+ void clipDevRect(const SkRect&, SkRegion::Op = SkRegion::kIntersect_Op);
+ void clipDevPath(const SkPath&, SkRegion::Op = SkRegion::kIntersect_Op);
+
+ class B2FIter {
+ public:
+ B2FIter(const SkClipStack& stack);
+
+ struct Clip {
+ const SkRect* fRect; // if non-null, this is a rect clip
+ const SkPath* fPath; // if non-null, this is a path clip
+ SkRegion::Op fOp;
+ };
+
+ /**
+ * Return the clip for this element in the iterator. If next() returns
+ * NULL, then the iterator is done. The type of clip is determined by
+ * the pointers fRect and fPath:
+ *
+ * fRect==NULL fPath!=NULL path clip
+ * fRect!=NULL fPath==NULL rect clip
+ * fRect==NULL fPath==NULL empty clip
+ */
+ const Clip* next();
+
+ private:
+ Clip fClip;
+ SkDeque::F2BIter fIter;
+ };
+
+private:
+ friend class B2FIter;
+ struct Rec;
+
+ SkDeque fDeque;
+ int fSaveCount;
+};
+
+#endif
+