Roll Chrome into Mojo.

skia/ext/pixel_ref_utils.cc

 // Copyright 2014 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/pixel_ref_utils.h"
 
 #include <algorithm>
 
 #include "third_party/skia/include/core/SkBitmapDevice.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ skipping 75 matching lines @@
 
     GatherPixelRefDevice::drawRect(draw, bounds, paint);
   }
   void drawRect(const SkDraw& draw,
                 const SkRect& rect,
                 const SkPaint& paint) override {
     SkBitmap bitmap;
     if (GetBitmapFromPaint(paint, &bitmap)) {
       SkRect mapped_rect;
       draw.fMatrix->mapRect(&mapped_rect, rect);
-      mapped_rect.intersect(SkRect::Make(draw.fRC->getBounds()));
-      AddBitmap(bitmap, mapped_rect);
+      if (mapped_rect.intersect(SkRect::Make(draw.fRC->getBounds())))
+        AddBitmap(bitmap, mapped_rect);
     }
   }
   void drawOval(const SkDraw& draw,
                 const SkRect& rect,
                 const SkPaint& paint) override {
     GatherPixelRefDevice::drawRect(draw, rect, paint);
   }
   void drawRRect(const SkDraw& draw,
                  const SkRRect& rect,
                  const SkPaint& paint) override {
@@ skipping 212 matching lines @@
                      int y) override {
     return false;
   }
 
  private:
   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);
-    pixel_ref_set_->Add(bm.pixelRef(), paint_rect);
+    if (paint_rect.intersect(rect, canvas_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 17 matching lines @@
 
   GatherPixelRefDevice device(empty_bitmap, &pixel_ref_set);
   SkNoSaveLayerCanvas canvas(&device);
 
   // Draw the picture pinned against our top/left corner.
   canvas.translate(-picture_bounds.left(), -picture_bounds.top());
   canvas.drawPicture(picture);
 }
 
 }  // namespace skia