Revert 82838 - 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.

TBR=sail@chromium.org
Review URL: http://codereview.chromium.org/6895050

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@82856 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 28 insertions, 214 deletions

diff --git a/skia/ext/skia_utils_mac.h b/skia/ext/skia_utils_mac.h
index 04d4a1d..0551643 100644
--- a/skia/ext/skia_utils_mac.h
+++ b/skia/ext/skia_utils_mac.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <CoreGraphics/CGColor.h>
-#include <vector>
 
 #include "third_party/skia/include/core/SkColor.h"
 
@@ -24,10 +23,8 @@ typedef struct _NSSize NSSize;
 
 #ifdef __OBJC__
 @class NSImage;
-@class NSImageRep;
 #else
 class NSImage;
-class NSImageRep;
 #endif
 
 namespace gfx {
@@ -67,9 +64,6 @@ 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);
@@ -79,10 +73,6 @@ 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 3c6b191..c78121a 100644
--- a/skia/ext/skia_utils_mac.mm
+++ b/skia/ext/skia_utils_mac.mm
@@ -8,7 +8,6 @@
 
 #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"
@@ -168,67 +167,19 @@ SkBitmap NSImageToSkBitmap(NSImage* image, NSSize size, bool is_opaque) {
   return bitmap;
 }
 
-SkBitmap NSImageRepToSkBitmap(NSImageRep* image, NSSize size, bool is_opaque) {
-  SkBitmap bitmap;
-  bitmap.setConfig(SkBitmap::kARGB_8888_Config, size.width, size.height);
-  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));
-  void* data = bitmap.getPixels();
-
-  // Allocate a bitmap context with 4 components per pixel (BGRA). Apple
-  // recommends these flags for improved CG performance.
-#define HAS_ARGB_SHIFTS(a, r, g, b) \
-            (SK_A32_SHIFT == (a) && SK_R32_SHIFT == (r) \
-             && SK_G32_SHIFT == (g) && SK_B32_SHIFT == (b))
-#if defined(SK_CPU_LENDIAN) && HAS_ARGB_SHIFTS(24, 16, 8, 0)
-  base::mac::ScopedCFTypeRef<CGContextRef> context(
-    CGBitmapContextCreate(data, size.width, size.height, 8, size.width*4,
-                          color_space,
-                          kCGImageAlphaPremultipliedFirst |
-                              kCGBitmapByteOrder32Host));
-#else
-#error We require that Skia's and CoreGraphics's recommended \
-       image memory layout match.
-#endif
-#undef HAS_ARGB_SHIFTS
-
-  // Something went really wrong. Best guess is that the bitmap data is invalid.
-  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 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)];
-
-  // Done drawing, restore context.
-  [NSGraphicsContext restoreGraphicsState];
-
-  return bitmap;
-}
-
 NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& skiaBitmap,
                                          CGColorSpaceRef colorSpace) {
   if (skiaBitmap.isNull())
     return nil;
 
   // First convert SkBitmap to CGImageRef.
-  base::mac::ScopedCFTypeRef<CGImageRef> cgimage(
-      SkCreateCGImageRefWithColorspace(skiaBitmap, colorSpace));
+  CGImageRef cgimage =
+    SkCreateCGImageRefWithColorspace(skiaBitmap, colorSpace);
 
   // Now convert to NSImage.
-  scoped_nsobject<NSBitmapImageRep> bitmap(
-      [[NSBitmapImageRep alloc] initWithCGImage:cgimage]);
+  NSBitmapImageRep* bitmap = [[[NSBitmapImageRep alloc]
+                                   initWithCGImage:cgimage] autorelease];
+  CFRelease(cgimage);
   NSImage* image = [[[NSImage alloc] init] autorelease];
   [image addRepresentation:bitmap];
   [image setSize:NSMakeSize(skiaBitmap.width(), skiaBitmap.height())];
@@ -241,37 +192,6 @@ 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);
diff --git a/skia/ext/skia_utils_mac_unittest.mm b/skia/ext/skia_utils_mac_unittest.mm
index 7d07fb6..7401f11 100644
--- a/skia/ext/skia_utils_mac_unittest.mm
+++ b/skia/ext/skia_utils_mac_unittest.mm
@@ -9,60 +9,39 @@ namespace {
 
 class SkiaUtilsMacTest : public testing::Test {
  public:
-  // Creates a red or blue bitmap.
-  SkBitmap CreateSkBitmap(int width, int height, bool isred, bool tfbit);
-
-  // Creates a red or blue image.
-  NSImage* CreateNSImage(int width, int height, bool isred);
-
-  // Checks that the given bitmap rep is actually red or blue.
-  void TestImageRep(NSBitmapImageRep* imageRep, bool isred);
-
-  // Checks that the given bitmap is actually red or blue.
-  void TestSkBitmap(const SkBitmap& bitmap, bool isred);
-
   // If not red, is blue.
   // If not tfbit (twenty-four-bit), is 444.
   void ShapeHelper(int width, int height, bool isred, bool tfbit);
 };
 
-SkBitmap SkiaUtilsMacTest::CreateSkBitmap(int width, int height,
-                                          bool isred, bool tfbit) {
-  SkBitmap bitmap;
+void SkiaUtilsMacTest::ShapeHelper(int width, int height,
+                                   bool isred, bool tfbit) {
+  SkBitmap thing;
 
   if (tfbit)
-    bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
+    thing.setConfig(SkBitmap::kARGB_8888_Config, width, height);
   else
-    bitmap.setConfig(SkBitmap::kARGB_4444_Config, width, height);
-  bitmap.allocPixels();
+    thing.setConfig(SkBitmap::kARGB_4444_Config, width, height);
+  thing.allocPixels();
 
   if (isred)
-    bitmap.eraseRGB(0xff, 0, 0);
+    thing.eraseRGB(0xff, 0, 0);
   else
-    bitmap.eraseRGB(0, 0, 0xff);
+    thing.eraseRGB(0, 0, 0xff);
 
-  return bitmap;
-}
+  // Confirm size
+  NSImage* image = gfx::SkBitmapToNSImage(thing);
+  EXPECT_DOUBLE_EQ([image size].width, (double)width);
+  EXPECT_DOUBLE_EQ([image size].height, (double)height);
 
-NSImage* SkiaUtilsMacTest::CreateNSImage(int width, int height, bool isred) {
-  NSImage* image = [[[NSImage alloc] initWithSize:NSMakeSize(width, height)]
-      autorelease];
+  // Get the color of a pixel and make sure it looks fine
   [image lockFocus];
-  if (isred)
-    [[NSColor colorWithDeviceRed:1.0 green:0.0 blue:0.0 alpha:1.0] set];
-  else
-    [[NSColor colorWithDeviceRed:0.0 green:0.0 blue:1.0 alpha:1.0] set];
-  NSRectFill(NSMakeRect(0, 0, width, height));
-  [image unlockFocus];
-  return image;
-}
 
-void SkiaUtilsMacTest::TestImageRep(NSBitmapImageRep* imageRep, bool isred) {
-  // Get the color of a pixel and make sure it looks fine
-  int x = [imageRep size].width > 17 ? 17 : 0;
-  int y = [imageRep size].height > 17 ? 17 : 0;
-  NSColor* color = [imageRep colorAtX:x y:y];
+  int x = width > 17 ? 17 : 0;
+  int y = height > 17 ? 17 : 0;
+  NSColor* color = NSReadPixel(NSMakePoint(x, y));
   CGFloat red = 0, green = 0, blue = 0, alpha = 0;
+  [image unlockFocus];
 
   // SkBitmapToNSImage returns a bitmap in the calibrated color space (sRGB),
   // while NSReadPixel returns a color in the device color space. Convert back
@@ -73,45 +52,14 @@ void SkiaUtilsMacTest::TestImageRep(NSBitmapImageRep* imageRep, bool isred) {
 
   // Be tolerant of floating point rounding and lossy color space conversions.
   if (isred) {
-    EXPECT_NEAR(red, 1.0, 0.025);
-    EXPECT_NEAR(blue, 0.0, 0.025);
-  } else {
-    EXPECT_NEAR(red, 0.0, 0.025);
-    EXPECT_NEAR(blue, 1.0, 0.025);
-  }
-  EXPECT_NEAR(green, 0.0, 0.025);
-  EXPECT_NEAR(alpha, 1.0, 0.025);
-}
-
-void SkiaUtilsMacTest::TestSkBitmap(const SkBitmap& bitmap, bool isred) {
-  int x = bitmap.width() > 17 ? 17 : 0;
-  int y = bitmap.height() > 17 ? 17 : 0;
-  SkColor color = bitmap.getColor(x, y);
-
-  if (isred) {
-    EXPECT_EQ(255u, SkColorGetR(color));
-    EXPECT_EQ(0u, SkColorGetB(color));
+    EXPECT_GT(red, 0.95);
+    EXPECT_LT(blue, 0.05);
   } else {
-    EXPECT_EQ(0u, SkColorGetR(color));
-    EXPECT_EQ(255u, SkColorGetB(color));
+    EXPECT_LT(red, 0.05);
+    EXPECT_GT(blue, 0.95);
   }
-  EXPECT_EQ(0u, SkColorGetG(color));
-  EXPECT_EQ(255u, SkColorGetA(color));
-}
-
-void SkiaUtilsMacTest::ShapeHelper(int width, int height,
-                                   bool isred, bool tfbit) {
-  SkBitmap thing(CreateSkBitmap(width, height, isred, tfbit));
-
-  // Confirm size
-  NSImage* image = gfx::SkBitmapToNSImage(thing);
-  EXPECT_DOUBLE_EQ([image size].width, (double)width);
-  EXPECT_DOUBLE_EQ([image size].height, (double)height);
-
-  EXPECT_TRUE([[image representations] count] == 1);
-  EXPECT_TRUE([[[image representations] lastObject]
-      isKindOfClass:[NSBitmapImageRep class]]);
-  TestImageRep([[image representations] lastObject], isred);
+  EXPECT_LT(green, 0.05);
+  EXPECT_GT(alpha, 0.95);
 }
 
 TEST_F(SkiaUtilsMacTest, FAILS_BitmapToNSImage_RedSquare64x64) {
@@ -126,48 +74,4 @@ TEST_F(SkiaUtilsMacTest, FAILS_BitmapToNSImage_BlueRectangle444) {
   ShapeHelper(200, 200, false, false);
 }
 
-TEST_F(SkiaUtilsMacTest, FAILS_MultipleBitmapsToNSImage) {
-  int redWidth = 10;
-  int redHeight = 15;
-  int blueWidth = 20;
-  int blueHeight = 30;
-
-  SkBitmap redBitmap(CreateSkBitmap(redWidth, redHeight, true, true));
-  SkBitmap blueBitmap(CreateSkBitmap(blueWidth, blueHeight, false, true));
-  std::vector<const SkBitmap*> bitmaps;
-  bitmaps.push_back(&redBitmap);
-  bitmaps.push_back(&blueBitmap);
-
-  NSImage* image = gfx::SkBitmapsToNSImage(bitmaps);
-
-  // Image size should be the same as the smallest bitmap.
-  EXPECT_DOUBLE_EQ(redWidth, [image size].width);
-  EXPECT_DOUBLE_EQ(redHeight, [image size].height);
-
-  EXPECT_EQ(2u, [[image representations] count]);
-
-  for (NSBitmapImageRep* imageRep in [image representations]) {
-    bool isred = [imageRep size].width == redWidth;
-    if (isred) {
-      EXPECT_DOUBLE_EQ(redHeight, [imageRep size].height);
-    } else {
-      EXPECT_DOUBLE_EQ(blueWidth, [imageRep size].width);
-      EXPECT_DOUBLE_EQ(blueHeight, [imageRep size].height);
-    }
-    TestImageRep(imageRep, isred);
-  }
-}
-
-TEST_F(SkiaUtilsMacTest, FAILS_NSImageRepToSkBitmap) {
-  int width = 10;
-  int height = 15;
-  bool isred = true;
-
-  NSImage* image = CreateNSImage(width, height, isred);
-  EXPECT_EQ(1u, [[image representations] count]);
-  NSBitmapImageRep* imageRep = [[image representations] lastObject];
-  SkBitmap bitmap(gfx::NSImageRepToSkBitmap(imageRep, [image size], false));
-  TestSkBitmap(bitmap, isred);
-}
-
 }  // namespace