Temporary change to test perf regression (full)

This change tests which part of this review:
http://codereview.chromium.org/6897013/
is causing a performance regression. This change will be reverted later tonight.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@82838 0039d316-1c4b-4281-b951-d872f2087c98

7 files changed, 114 insertions, 88 deletions

diff --git a/ui/base/resource/resource_bundle.cc b/ui/base/resource/resource_bundle.cc
index a8d9607..306a61e 100644
--- a/ui/base/resource/resource_bundle.cc
+++ b/ui/base/resource/resource_bundle.cc
@@ -131,8 +131,11 @@ gfx::Image& ResourceBundle::GetImageNamed(int resource_id) {
     if (images_.count(resource_id))
       return *images_[resource_id];
 
-    // TODO(sail): Add the large bitmap to the image as well.
-    gfx::Image* image = new gfx::Image(bitmap.release());
+    std::vector<const SkBitmap*> bitmaps;
+    bitmaps.push_back(bitmap.release());
+    if (large_bitmap.get())
+      bitmaps.push_back(large_bitmap.release());
+    gfx::Image* image = new gfx::Image(bitmaps);
     images_[resource_id] = image;
     return *image;
   }
diff --git a/ui/gfx/image.cc b/ui/gfx/image.cc
index 9395279..23edd96 100644
--- a/ui/gfx/image.cc
+++ b/ui/gfx/image.cc
@@ -7,6 +7,7 @@
 #include <algorithm>
 
 #include "base/logging.h"
+#include "base/stl_util-inl.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 #if defined(OS_LINUX)
@@ -26,7 +27,7 @@ namespace internal {
 #if defined(OS_MACOSX)
 // This is a wrapper around gfx::NSImageToSkBitmap() because this cross-platform
 // file cannot include the [square brackets] of ObjC.
-const SkBitmap* NSImageToSkBitmap(NSImage* image);
+bool NSImageToSkBitmaps(NSImage* image, std::vector<const SkBitmap*>* bitmaps);
 #endif
 
 #if defined(OS_LINUX)
@@ -84,20 +85,27 @@ class ImageRep {
 class SkBitmapRep : public ImageRep {
  public:
   explicit SkBitmapRep(const SkBitmap* bitmap)
-      : ImageRep(Image::kSkBitmapRep),
-        bitmap_(bitmap) {
+      : ImageRep(Image::kSkBitmapRep) {
     CHECK(bitmap);
+    bitmaps_.push_back(bitmap);
+  }
+
+  explicit SkBitmapRep(const std::vector<const SkBitmap*>& bitmaps)
+      : ImageRep(Image::kSkBitmapRep),
+        bitmaps_(bitmaps) {
+    CHECK(!bitmaps_.empty());
   }
 
   virtual ~SkBitmapRep() {
-    delete bitmap_;
-    bitmap_ = NULL;
+    STLDeleteElements(&bitmaps_);
   }
 
-  const SkBitmap* bitmap() const { return bitmap_; }
+  const SkBitmap* bitmap() const { return bitmaps_[0]; }
+
+  const std::vector<const SkBitmap*>& bitmaps() const { return bitmaps_; }
 
  private:
-  const SkBitmap* bitmap_;
+  std::vector<const SkBitmap*> bitmaps_;
 
   DISALLOW_COPY_AND_ASSIGN(SkBitmapRep);
 };
@@ -193,6 +201,12 @@ Image::Image(const SkBitmap* bitmap)
   AddRepresentation(rep);
 }
 
+Image::Image(const std::vector<const SkBitmap*>& bitmaps)
+    : storage_(new internal::ImageStorage(Image::kSkBitmapRep)) {
+  internal::SkBitmapRep* rep = new internal::SkBitmapRep(bitmaps);
+  AddRepresentation(rep);
+}
+
 #if defined(OS_LINUX)
 Image::Image(GdkPixbuf* pixbuf)
     : storage_(new internal::ImageStorage(Image::kGdkPixbufRep)) {
@@ -289,8 +303,9 @@ internal::ImageRep* Image::GetRepresentation(RepresentationType rep_type) {
 #elif defined(OS_MACOSX)
     if (storage_->default_representation_type() == Image::kNSImageRep) {
       internal::NSImageRep* nsimage_rep = default_rep->AsNSImageRep();
-      rep = new internal::SkBitmapRep(
-          internal::NSImageToSkBitmap(nsimage_rep->image()));
+      std::vector<const SkBitmap*> bitmaps;
+      CHECK(internal::NSImageToSkBitmaps(nsimage_rep->image(), &bitmaps));
+      rep = new internal::SkBitmapRep(bitmaps);
     }
 #endif
     CHECK(rep);
@@ -309,7 +324,7 @@ internal::ImageRep* Image::GetRepresentation(RepresentationType rep_type) {
     }
 #elif defined(OS_MACOSX)
     if (rep_type == Image::kNSImageRep) {
-      NSImage* image = gfx::SkBitmapToNSImage(*(skia_rep->bitmap()));
+      NSImage* image = gfx::SkBitmapsToNSImage(skia_rep->bitmaps());
       base::mac::NSObjectRetain(image);
       native_rep = new internal::NSImageRep(image);
     }
@@ -327,4 +342,14 @@ void Image::AddRepresentation(internal::ImageRep* rep) {
   storage_->representations().insert(std::make_pair(rep->type(), rep));
 }
 
+size_t Image::GetNumberOfSkBitmaps() {
+  return GetRepresentation(Image::kSkBitmapRep)->AsSkBitmapRep()->
+      bitmaps().size();
+}
+
+const SkBitmap* Image::GetSkBitmapAtIndex(size_t index) {
+  return GetRepresentation(Image::kSkBitmapRep)->AsSkBitmapRep()->
+      bitmaps()[index];
+}
+
 }  // namespace gfx
diff --git a/ui/gfx/image.h b/ui/gfx/image.h
index 518d8ac4..ed9508f 100644
--- a/ui/gfx/image.h
+++ b/ui/gfx/image.h
@@ -18,6 +18,7 @@
 #pragma once
 
 #include <map>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
@@ -29,6 +30,7 @@ class SkBitmap;
 
 namespace {
 class ImageTest;
+class ImageMacTest;
 }
 
 namespace gfx {
@@ -51,11 +53,18 @@ class Image {
   // Creates a new image with the default representation. The object will take
   // ownership of the image.
   explicit Image(const SkBitmap* bitmap);
+
+  // To create an Image that supports multiple resolutions pass a vector
+  // of bitmaps, one for each resolution.
+  explicit Image(const std::vector<const SkBitmap*>& bitmaps);
+
 #if defined(OS_LINUX)
   // Does not increase |pixbuf|'s reference count; expects to take ownership.
   explicit Image(GdkPixbuf* pixbuf);
 #elif defined(OS_MACOSX)
   // Does not retain |image|; expects to take ownership.
+  // A single NSImage object can contain multiple bitmaps so there's no reason
+  // to pass a vector of these.
   explicit Image(NSImage* image);
 #endif
 
@@ -78,6 +87,16 @@ class Image {
   operator NSImage*();
 #endif
 
+  // Gets the number of bitmaps in this image. This may cause a conversion
+  // to a bitmap representation. Note, this function and GetSkBitmapAtIndex()
+  // are primarily meant to be used by the theme provider.
+  size_t GetNumberOfSkBitmaps();
+
+  // Gets the bitmap at the given index. This may cause a conversion
+  // to a bitmap representation. Note, the internal ordering of bitmaps is not
+  // guaranteed.
+  const SkBitmap* GetSkBitmapAtIndex(size_t index);
+
   // Inspects the representations map to see if the given type exists.
   bool HasRepresentation(RepresentationType type);
 
@@ -103,6 +122,7 @@ class Image {
   scoped_refptr<internal::ImageStorage> storage_;
 
   friend class ::ImageTest;
+  friend class ::ImageMacTest;
 };
 
 }  // namespace gfx
diff --git a/ui/gfx/image_mac.mm b/ui/gfx/image_mac.mm
index b3dc977..55b4aa4 100644
--- a/ui/gfx/image_mac.mm
+++ b/ui/gfx/image_mac.mm
@@ -4,14 +4,22 @@
 
 #import <AppKit/AppKit.h>
 
+#include "base/memory/scoped_ptr.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace gfx {
 namespace internal {
 
-const SkBitmap* NSImageToSkBitmap(NSImage* image) {
-  return new SkBitmap(::gfx::NSImageToSkBitmap(image, [image size], false));
+bool NSImageToSkBitmaps(NSImage* image, std::vector<const SkBitmap*>* bitmaps) {
+  for (NSImageRep* imageRep in [image representations]) {
+    scoped_ptr<SkBitmap> bitmap(new SkBitmap(
+        gfx::NSImageRepToSkBitmap(imageRep, [imageRep size], false)));
+    if (bitmap->isNull())
+      return false;
+    bitmaps->push_back(bitmap.release());
+  }
+  return true;
 }
 
 }  // namespace internal
diff --git a/ui/gfx/image_unittest.cc b/ui/gfx/image_unittest.cc
index ce2a1f8..aba1ed6 100644
--- a/ui/gfx/image_unittest.cc
+++ b/ui/gfx/image_unittest.cc
@@ -6,7 +6,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/image.h"
-#include "ui/gfx/image_unittest.h"
+#include "ui/gfx/image_unittest_util.h"
 
 #if defined(OS_LINUX)
 #include <gtk/gtk.h>
@@ -30,7 +30,7 @@ class ImageTest : public testing::Test {
 namespace gt = gfx::test;
 
 TEST_F(ImageTest, SkiaToSkia) {
-  gfx::Image image(gt::CreateBitmap());
+  gfx::Image image(gt::CreateBitmap(25, 25));
   const SkBitmap* bitmap = static_cast<const SkBitmap*>(image);
   EXPECT_TRUE(bitmap);
   EXPECT_FALSE(bitmap->isNull());
@@ -48,7 +48,7 @@ TEST_F(ImageTest, SkiaToSkia) {
 }
 
 TEST_F(ImageTest, SkiaToSkiaRef) {
-  gfx::Image image(gt::CreateBitmap());
+  gfx::Image image(gt::CreateBitmap(25, 25));
 
   const SkBitmap& bitmap = static_cast<const SkBitmap&>(image);
   EXPECT_FALSE(bitmap.isNull());
@@ -64,7 +64,7 @@ TEST_F(ImageTest, SkiaToSkiaRef) {
 }
 
 TEST_F(ImageTest, SkiaToPlatform) {
-  gfx::Image image(gt::CreateBitmap());
+  gfx::Image image(gt::CreateBitmap(25, 25));
   const size_t kRepCount = kUsesSkiaNatively ? 1U : 2U;
 
   EXPECT_TRUE(image.HasRepresentation(gfx::Image::kSkBitmapRep));
@@ -127,7 +127,7 @@ TEST_F(ImageTest, CheckSkiaColor) {
 TEST_F(ImageTest, SwapRepresentations) {
   const size_t kRepCount = kUsesSkiaNatively ? 1U : 2U;
 
-  gfx::Image image1(gt::CreateBitmap());
+  gfx::Image image1(gt::CreateBitmap(25, 25));
   const SkBitmap* bitmap1 = image1;
   EXPECT_EQ(1U, image1.RepresentationCount());
 
@@ -148,7 +148,7 @@ TEST_F(ImageTest, SwapRepresentations) {
 TEST_F(ImageTest, Copy) {
   const size_t kRepCount = kUsesSkiaNatively ? 1U : 2U;
 
-  gfx::Image image1(gt::CreateBitmap());
+  gfx::Image image1(gt::CreateBitmap(25, 25));
   gfx::Image image2(image1);
 
   EXPECT_EQ(1U, image1.RepresentationCount());
@@ -171,6 +171,41 @@ TEST_F(ImageTest, Assign) {
             static_cast<const SkBitmap*>(image2));
 }
 
+TEST_F(ImageTest, MultiResolutionSkBitmap) {
+  const int width1 = 10;
+  const int height1 = 12;
+  const int width2 = 20;
+  const int height2 = 24;
+
+  std::vector<const SkBitmap*> bitmaps;
+  bitmaps.push_back(gt::CreateBitmap(width1, height1));
+  bitmaps.push_back(gt::CreateBitmap(width2, height2));
+  gfx::Image image(bitmaps);
+
+  EXPECT_EQ(1u, image.RepresentationCount());
+  EXPECT_EQ(2u, image.GetNumberOfSkBitmaps());
+
+  const SkBitmap* bitmap1 = image.GetSkBitmapAtIndex(0);
+  EXPECT_TRUE(bitmap1);
+  const SkBitmap* bitmap2 = image.GetSkBitmapAtIndex(1);
+  EXPECT_TRUE(bitmap2);
+
+  if (bitmap1->width() == width1) {
+    EXPECT_EQ(bitmap1->height(), height1);
+    EXPECT_EQ(bitmap2->width(), width2);
+    EXPECT_EQ(bitmap2->height(), height2);
+  } else {
+    EXPECT_EQ(bitmap1->width(), width2);
+    EXPECT_EQ(bitmap1->height(), height2);
+    EXPECT_EQ(bitmap2->width(), width1);
+    EXPECT_EQ(bitmap2->height(), height1);
+  }
+
+  // Sanity check.
+  EXPECT_EQ(1u, image.RepresentationCount());
+  EXPECT_EQ(2u, image.GetNumberOfSkBitmaps());
+}
+
 // Integration tests with UI toolkit frameworks require linking against the
 // Views library and cannot be here (gfx_unittests doesn't include it). They
 // instead live in /chrome/browser/ui/tests/ui_gfx_image_unittest.cc.
diff --git a/ui/gfx/image_unittest.h b/ui/gfx/image_unittest.h
index 09abfce..e69de29 100644
--- a/ui/gfx/image_unittest.h
+++ b/ui/gfx/image_unittest.h
@@ -1,67 +0,0 @@
-// Copyright (c) 2011 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.
-
-// Because the unit tests for gfx::Image are spread across multiple
-// implementation files, this header contains the reusable components.
-
-#ifndef UI_GFX_IMAGE_UNITTEST_H_
-#define UI_GFX_IMAGE_UNITTEST_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-
-#if defined(OS_LINUX)
-#include "ui/gfx/gtk_util.h"
-#elif defined(OS_MACOSX)
-#include "base/mac/mac_util.h"
-#include "skia/ext/skia_utils_mac.h"
-#endif
-
-namespace gfx {
-namespace test {
-
-#if defined(OS_MACOSX)
-typedef NSImage* PlatformImage;
-#elif defined(OS_LINUX) && !defined(TOOLKIT_VIEWS)
-typedef GdkPixbuf* PlatformImage;
-#else
-typedef const SkBitmap* PlatformImage;
-#endif
-
-SkBitmap* CreateBitmap() {
-  SkBitmap* bitmap = new SkBitmap();
-  bitmap->setConfig(SkBitmap::kARGB_8888_Config, 25, 25);
-  bitmap->allocPixels();
-  bitmap->eraseRGB(255, 0, 0);
-  return bitmap;
-}
-
-PlatformImage CreatePlatformImage() {
-  scoped_ptr<SkBitmap> bitmap(CreateBitmap());
-#if defined(OS_MACOSX)
-  NSImage* image = gfx::SkBitmapToNSImage(*(bitmap.get()));
-  base::mac::NSObjectRetain(image);
-  return image;
-#elif defined(OS_LINUX) && !defined(TOOLKIT_VIEWS)
-  return gfx::GdkPixbufFromSkBitmap(bitmap.get());
-#else
-  return bitmap.release();
-#endif
-}
-
-gfx::Image::RepresentationType GetPlatformRepresentationType() {
-#if defined(OS_MACOSX)
-  return gfx::Image::kNSImageRep;
-#elif defined(OS_LINUX) && !defined(TOOLKIT_VIEWS)
-  return gfx::Image::kGdkPixbufRep;
-#else
-  return gfx::Image::kSkBitmapRep;
-#endif
-}
-
-}  // namespace test
-}  // namespace gfx
-
-#endif  // UI_GFX_IMAGE_UNITTEST_H_
diff --git a/ui/ui_unittests.gypi b/ui/ui_unittests.gypi
index 2a767a4..2867afb 100644
--- a/ui/ui_unittests.gypi
+++ b/ui/ui_unittests.gypi
@@ -32,8 +32,10 @@
         'gfx/codec/png_codec_unittest.cc',
         'gfx/color_utils_unittest.cc',
         'gfx/font_unittest.cc',
+        'gfx/image_mac_unittest.mm',
         'gfx/image_unittest.cc',
-        'gfx/image_unittest.h',
+        'gfx/image_unittest_util.h',
+        'gfx/image_unittest_util.cc',
         'gfx/insets_unittest.cc',
         'gfx/rect_unittest.cc',
         'gfx/run_all_unittests.cc',