1 files changed, 69 insertions, 0 deletions
diff --git a/gfx/skia/skia/include/core/SkOverdrawCanvas.h b/gfx/skia/skia/include/core/SkOverdrawCanvas.h
new file mode 100644
index 0000000000..f3ffc06556
--- /dev/null
+++ b/gfx/skia/skia/include/core/SkOverdrawCanvas.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkOverdrawCanvas_DEFINED
+#define SkOverdrawCanvas_DEFINED
+
+#include "include/core/SkCanvasVirtualEnforcer.h"
+#include "include/utils/SkNWayCanvas.h"
+
+/**
+ *  Captures all drawing commands.  Rather than draw the actual content, this device
+ *  increments the alpha channel of each pixel every time it would have been touched
+ *  by a draw call.  This is useful for detecting overdraw.
+ */
+class SK_API SkOverdrawCanvas : public SkCanvasVirtualEnforcer<SkNWayCanvas> {
+public:
+    /* Does not take ownership of canvas */
+    SkOverdrawCanvas(SkCanvas*);
+
+    void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override;
+    void onDrawGlyphRunList(
+            const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) override;
+    void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode,
+                     const SkPaint&) override;
+    void onDrawPaint(const SkPaint&) override;
+    void onDrawBehind(const SkPaint& paint) override;
+    void onDrawRect(const SkRect&, const SkPaint&) override;
+    void onDrawRegion(const SkRegion&, const SkPaint&) override;
+    void onDrawOval(const SkRect&, const SkPaint&) override;
+    void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override;
+    void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
+    void onDrawRRect(const SkRRect&, const SkPaint&) override;
+    void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override;
+    void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override;
+    void onDrawPath(const SkPath&, const SkPaint&) override;
+
+    void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&,
+                      const SkPaint*) override;
+    void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&,
+                          const SkPaint*, SrcRectConstraint) override;
+    void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode,
+                             const SkPaint*) override;
+    void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int,
+                     SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override;
+
+    void onDrawDrawable(SkDrawable*, const SkMatrix*) override;
+    void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
+
+    void onDrawAnnotation(const SkRect&, const char key[], SkData* value) override;
+    void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override;
+
+    void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], SkCanvas::QuadAAFlags, const SkColor4f&,
+                          SkBlendMode) override;
+    void onDrawEdgeAAImageSet2(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[],
+                               const SkSamplingOptions&,const SkPaint*, SrcRectConstraint) override;
+
+private:
+    inline SkPaint overdrawPaint(const SkPaint& paint);
+
+    SkPaint   fPaint;
+
+    using INHERITED = SkCanvasVirtualEnforcer<SkNWayCanvas>;
+};
+
+#endif