Temporary change to test perf regression

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.

BUG=None
TEST=None
Review URL: http://codereview.chromium.org/6880170

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@82833 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 56 insertions, 13 deletions

diff --git a/skia/ext/skia_utils_mac.h b/skia/ext/skia_utils_mac.h
index 0551643..04d4a1d 100644
--- a/skia/ext/skia_utils_mac.h
+++ b/skia/ext/skia_utils_mac.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <CoreGraphics/CGColor.h>
+#include <vector>
 
 #include "third_party/skia/include/core/SkColor.h"
 
@@ -23,8 +24,10 @@ typedef struct _NSSize NSSize;
 
 #ifdef __OBJC__
 @class NSImage;
+@class NSImageRep;
 #else
 class NSImage;
+class NSImageRep;
 #endif
 
 namespace gfx {
@@ -64,6 +67,9 @@ SkBitmap CGImageToSkBitmap(CGImageRef image);
 // Draws an NSImage with a given size into a SkBitmap.
 SkBitmap NSImageToSkBitmap(NSImage* image, NSSize size, bool is_opaque);
 
+// Draws an NSImageRep with a given size into a SkBitmap.
+SkBitmap NSImageRepToSkBitmap(NSImageRep* image, NSSize size, bool is_opaque);
+
 // Given an SkBitmap and a color space, return an autoreleased NSImage.
 NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& icon,
                                          CGColorSpaceRef colorSpace);
@@ -73,6 +79,10 @@ NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& icon,
 // TODO(thakis): Remove this -- http://crbug.com/69432
 NSImage* SkBitmapToNSImage(const SkBitmap& icon);
 
+// Given a vector of SkBitmaps, return an NSImage with each bitmap added
+// as a representation.
+NSImage* SkBitmapsToNSImage(const std::vector<const SkBitmap*>& bitmaps);
+
 // Returns |[NSImage imageNamed:@"NSApplicationIcon"]| as SkBitmap.
 SkBitmap AppplicationIconAtSize(int size);
 
diff --git a/skia/ext/skia_utils_mac.mm b/skia/ext/skia_utils_mac.mm
index c78121a..2ecb3f2 100644
--- a/skia/ext/skia_utils_mac.mm
+++ b/skia/ext/skia_utils_mac.mm
@@ -8,6 +8,7 @@
 
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
+#include "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "skia/ext/bitmap_platform_device_mac.h"
 #include "third_party/skia/include/utils/mac/SkCGUtils.h"
@@ -116,15 +117,20 @@ SkBitmap CGImageToSkBitmap(CGImageRef image) {
 }
 
 SkBitmap NSImageToSkBitmap(NSImage* image, NSSize size, bool is_opaque) {
+  return NSImageRepToSkBitmap([image bestRepresentationForDevice:nil],
+                              size, is_opaque);
+}
+
+SkBitmap NSImageRepToSkBitmap(NSImageRep* image, NSSize size, bool is_opaque) {
   SkBitmap bitmap;
   bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width, size.height);
-  if (bitmap.allocPixels() != true)
+  if (!bitmap.allocPixels())
     return bitmap;  // Return |bitmap| which should respond true to isNull().
 
   bitmap.setIsOpaque(is_opaque);
 
   base::mac::ScopedCFTypeRef<CGColorSpaceRef> color_space(
-    CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
+      CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
   void* data = bitmap.getPixels();
 
   // Allocate a bitmap context with 4 components per pixel (BGRA). Apple
@@ -145,21 +151,18 @@ SkBitmap NSImageToSkBitmap(NSImage* image, NSSize size, bool is_opaque) {
 #undef HAS_ARGB_SHIFTS
 
   // Something went really wrong. Best guess is that the bitmap data is invalid.
-  DCHECK(context != NULL);
+  DCHECK(context);
 
   // Save the current graphics context so that we can restore it later.
   [NSGraphicsContext saveGraphicsState];
 
   // Dummy context that we will draw into.
   NSGraphicsContext* context_cocoa =
-    [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO];
+      [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO];
   [NSGraphicsContext setCurrentContext:context_cocoa];
 
   // This will stretch any images to |size| if it does not fit or is non-square.
-  [image drawInRect:NSMakeRect(0, 0, size.width, size.height)
-           fromRect:NSZeroRect
-          operation:NSCompositeCopy
-           fraction:1.0];
+  [image drawInRect:NSMakeRect(0, 0, size.width, size.height)];
 
   // Done drawing, restore context.
   [NSGraphicsContext restoreGraphicsState];
@@ -173,13 +176,12 @@ NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& skiaBitmap,
     return nil;
 
   // First convert SkBitmap to CGImageRef.
-  CGImageRef cgimage =
-    SkCreateCGImageRefWithColorspace(skiaBitmap, colorSpace);
+  base::mac::ScopedCFTypeRef<CGImageRef> cgimage(
+      SkCreateCGImageRefWithColorspace(skiaBitmap, colorSpace));
 
   // Now convert to NSImage.
-  NSBitmapImageRep* bitmap = [[[NSBitmapImageRep alloc]
-                                   initWithCGImage:cgimage] autorelease];
-  CFRelease(cgimage);
+  scoped_nsobject<NSBitmapImageRep> bitmap(
+      [[NSBitmapImageRep alloc] initWithCGImage:cgimage]);
   NSImage* image = [[[NSImage alloc] init] autorelease];
   [image addRepresentation:bitmap];
   [image setSize:NSMakeSize(skiaBitmap.width(), skiaBitmap.height())];
@@ -192,6 +194,37 @@ NSImage* SkBitmapToNSImage(const SkBitmap& skiaBitmap) {
   return SkBitmapToNSImageWithColorSpace(skiaBitmap, colorSpace.get());
 }
 
+NSImage* SkBitmapsToNSImage(const std::vector<const SkBitmap*>& bitmaps) {
+  if (bitmaps.empty())
+    return nil;
+
+  base::mac::ScopedCFTypeRef<CGColorSpaceRef> color_space(
+      CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
+  NSImage* image = [[[NSImage alloc] init] autorelease];
+  NSSize min_size = NSZeroSize;
+
+  for (std::vector<const SkBitmap*>::const_iterator it = bitmaps.begin();
+       it != bitmaps.end(); ++it) {
+    const SkBitmap& skiaBitmap = **it;
+    // First convert SkBitmap to CGImageRef.
+    base::mac::ScopedCFTypeRef<CGImageRef> cgimage(
+        SkCreateCGImageRefWithColorspace(skiaBitmap, color_space));
+
+    // Now convert to NSImage.
+    scoped_nsobject<NSBitmapImageRep> bitmap(
+        [[NSBitmapImageRep alloc] initWithCGImage:cgimage]);
+    [image addRepresentation:bitmap];
+
+    if (min_size.width == 0 || min_size.width > skiaBitmap.width()) {
+      min_size.width = skiaBitmap.width();
+      min_size.height = skiaBitmap.height();
+    }
+  }
+
+  [image setSize:min_size];
+  return image;
+}
+
 SkBitmap AppplicationIconAtSize(int size) {
   NSImage* image = [NSImage imageNamed:@"NSApplicationIcon"];
   return NSImageToSkBitmap(image, NSMakeSize(size, size), /* is_opaque=*/true);