cc: Gather and lock/unlock SkDiscardablePixelRefs instead of skia::LazyPixelRefs.

skia/ext/discardable_pixel_ref_utils.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "skia/ext/lazy_pixel_ref_utils.h"
+#include "skia/ext/discardable_pixel_ref_utils.h"
 
 #include <algorithm>
 
-#include "skia/ext/lazy_pixel_ref.h"
 #include "third_party/skia/include/core/SkBitmapDevice.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkData.h"
 #include "third_party/skia/include/core/SkDraw.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkRRect.h"
 #include "third_party/skia/include/core/SkRect.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "third_party/skia/src/core/SkRasterClip.h"
 
 namespace skia {
 
 namespace {
 
-// URI label for a lazily decoded SkPixelRef.
-const char kLabelLazyDecoded[] = "lazy";
+// URI label for a discardable SkPixelRef.
+const char kLabelDiscardable[] = "discardable";
 
-class LazyPixelRefSet {
+class DiscardablePixelRefSet {
  public:
-  LazyPixelRefSet(
-      std::vector<LazyPixelRefUtils::PositionLazyPixelRef>* pixel_refs)
+  DiscardablePixelRefSet(
+      std::vector<DiscardablePixelRefUtils::PositionPixelRef>* pixel_refs)
       : pixel_refs_(pixel_refs) {}
 
   void Add(SkPixelRef* pixel_ref, const SkRect& rect) {
-    // Only save lazy pixel refs.
+    // Only save discardable pixel refs.
     if (pixel_ref->getURI() &&
-        !strcmp(pixel_ref->getURI(), kLabelLazyDecoded)) {
-      LazyPixelRefUtils::PositionLazyPixelRef position_pixel_ref;
-      position_pixel_ref.lazy_pixel_ref =
-          static_cast<skia::LazyPixelRef*>(pixel_ref);
+        !strcmp(pixel_ref->getURI(), kLabelDiscardable)) {
+      DiscardablePixelRefUtils::PositionPixelRef position_pixel_ref;
+      position_pixel_ref.pixel_ref = pixel_ref;
       position_pixel_ref.pixel_ref_rect = rect;
       pixel_refs_->push_back(position_pixel_ref);
     }
   }
 
  private:
-  std::vector<LazyPixelRefUtils::PositionLazyPixelRef>* pixel_refs_;
+  std::vector<DiscardablePixelRefUtils::PositionPixelRef>* pixel_refs_;
 };
 
 class GatherPixelRefDevice : public SkBitmapDevice {
  public:
-  GatherPixelRefDevice(const SkBitmap& bm, LazyPixelRefSet* lazy_pixel_ref_set)
-      : SkBitmapDevice(bm), lazy_pixel_ref_set_(lazy_pixel_ref_set) {}
+  GatherPixelRefDevice(const SkBitmap& bm,
+                       DiscardablePixelRefSet* pixel_ref_set)
+      : SkBitmapDevice(bm), pixel_ref_set_(pixel_ref_set) {}
 
   virtual void clear(SkColor color) SK_OVERRIDE {}
   virtual void writePixels(const SkBitmap& bitmap,
                            int x,
                            int y,
                            SkCanvas::Config8888 config8888) SK_OVERRIDE {}
 
   virtual void drawPaint(const SkDraw& draw, const SkPaint& paint) SK_OVERRIDE {
     SkBitmap bitmap;
     if (GetBitmapFromPaint(paint, &bitmap)) {
@@ skipping 257 matching lines @@
 
  protected:
   virtual bool onReadPixels(const SkBitmap& bitmap,
                             int x,
                             int y,
                             SkCanvas::Config8888 config8888) SK_OVERRIDE {
     return false;
   }
 
  private:
-  LazyPixelRefSet* lazy_pixel_ref_set_;
+  DiscardablePixelRefSet* pixel_ref_set_;
 
   void AddBitmap(const SkBitmap& bm, const SkRect& rect) {
     SkRect canvas_rect = SkRect::MakeWH(width(), height());
     SkRect paint_rect = SkRect::MakeEmpty();
     paint_rect.intersect(rect, canvas_rect);
-    lazy_pixel_ref_set_->Add(bm.pixelRef(), paint_rect);
+    pixel_ref_set_->Add(bm.pixelRef(), paint_rect);
   }
 
   bool GetBitmapFromPaint(const SkPaint& paint, SkBitmap* bm) {
     SkShader* shader = paint.getShader();
     if (shader) {
       // Check whether the shader is a gradient in order to prevent generation
       // of bitmaps from gradient shaders, which implement asABitmap.
       if (SkShader::kNone_GradientType == shader->asAGradient(NULL))
         return shader->asABitmap(bm, NULL, NULL);
     }
@@ skipping 35 matching lines @@
     return this->updateClipConservativelyUsingBounds(
         rrect.getBounds(), op, false);
   }
 
  private:
   typedef SkCanvas INHERITED;
 };
 
 }  // namespace
 
-void LazyPixelRefUtils::GatherPixelRefs(
+void DiscardablePixelRefUtils::GatherPixelRefs(
     SkPicture* picture,
-    std::vector<PositionLazyPixelRef>* lazy_pixel_refs) {
-  lazy_pixel_refs->clear();
-  LazyPixelRefSet pixel_ref_set(lazy_pixel_refs);
+    std::vector<PositionPixelRef>* pixel_refs) {
+  pixel_refs->clear();
+  DiscardablePixelRefSet pixel_ref_set(pixel_refs);
 
   SkBitmap empty_bitmap;
   empty_bitmap.setConfig(
       SkBitmap::kNo_Config, picture->width(), picture->height());
 
   GatherPixelRefDevice device(empty_bitmap, &pixel_ref_set);
   NoSaveLayerCanvas canvas(&device);
 
   canvas.clipRect(SkRect::MakeWH(picture->width(), picture->height()),
                   SkRegion::kIntersect_Op,
                   false);
   canvas.drawPicture(*picture);
 }
 
 }  // namespace skia