grab from latest android



git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkScanPriv.h b/src/core/SkScanPriv.h
new file mode 100644
index 0000000..43dfdef
--- /dev/null
+++ b/src/core/SkScanPriv.h
@@ -0,0 +1,48 @@
+/* libs/graphics/sgl/SkScanPriv.h
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#ifndef SkScanPriv_DEFINED
+#define SkScanPriv_DEFINED
+
+#include "SkScan.h"
+#include "SkBlitter.h"
+
+class SkScanClipper {
+public:
+    SkScanClipper(SkBlitter* blitter, const SkRegion* clip, const SkIRect& bounds);
+
+    SkBlitter*      getBlitter() const { return fBlitter; }
+    const SkIRect*  getClipRect() const { return fClipRect; }
+
+private:
+    SkRectClipBlitter   fRectBlitter;
+    SkRgnClipBlitter    fRgnBlitter;
+    SkBlitter*          fBlitter;
+    const SkIRect*      fClipRect;
+};
+
+// clipRect == null means path is entirely inside the clip
+void sk_fill_path(const SkPath& path, const SkIRect* clipRect,
+                  SkBlitter* blitter, int stop_y, int shiftEdgesUp,
+                  const SkRegion& clipRgn);
+
+// blit the rects above and below avoid, clipped to clp
+void sk_blit_above_and_below(SkBlitter* blitter, const SkIRect& avoid,
+                             const SkRegion& clip);
+
+#endif
+