Index: include/utils/SkNoSaveLayerCanvas.h |
=================================================================== |
--- include/utils/SkNoSaveLayerCanvas.h (revision 0) |
+++ include/utils/SkNoSaveLayerCanvas.h (revision 0) |
@@ -0,0 +1,47 @@ |
+/* |
+ * Copyright 2014 Google Inc. |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#ifndef SkNoSaveLayerCanvas_DEFINED |
+#define SkNoSaveLayerCanvas_DEFINED |
+ |
+#include "SkCanvas.h" |
+#include "SkRRect.h" |
+ |
+// The NoSaveLayerCanvas is used to play back SkPictures when the saveLayer |
+// functionality isn't required (e.g., during analysis of the draw calls). |
+// It also simplifies the clipping calls to only use rectangles. |
+class SK_API SkNoSaveLayerCanvas : public SkCanvas { |
+public: |
+ SkNoSaveLayerCanvas(SkBaseDevice* device) : INHERITED(device) {} |
+ |
+protected: |
+ virtual SaveLayerStrategy willSaveLayer(const SkRect* bounds, const SkPaint* paint, |
+ SaveFlags flags) SK_OVERRIDE { |
+ this->INHERITED::willSaveLayer(bounds, paint, flags); |
+ return kNoLayer_SaveLayerStrategy; |
+ } |
+ |
+ // disable aa for speed |
+ virtual void onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE { |
+ this->INHERITED::onClipRect(rect, op, kHard_ClipEdgeStyle); |
+ } |
+ |
+ // for speed, just respect the bounds, and disable AA. May give us a few |
+ // false positives and negatives. |
+ virtual void onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE { |
+ this->updateClipConservativelyUsingBounds(path.getBounds(), op, |
+ path.isInverseFillType()); |
+ } |
+ virtual void onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE { |
+ this->updateClipConservativelyUsingBounds(rrect.getBounds(), op, false); |
+ } |
+ |
+private: |
+ typedef SkCanvas INHERITED; |
+}; |
+ |
+#endif // SkNoSaveLayerCanvas_DEFINED |