Revert 224473 "Remove dependency on ui::ScaleFactor from ui/gfx"

trunk/src/ui/gfx/image/image_mac_unittest.mm

 // Copyright (c) 2012 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 <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_png_rep.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/image/image_skia_util_mac.h"
 #include "ui/gfx/image/image_unittest_util.h"
 
 namespace {
 
 // Returns true if the structure of |ns_image| matches the structure
-// described by |width|, |height|, and |scales|.
+// described by |width|, |height|, and |scale_factors|.
 // The structure matches if:
 // - |ns_image| is not nil.
-// - |ns_image| has NSImageReps of |scales|.
+// - |ns_image| has NSImageReps of |scale_factors|.
 // - Each of the NSImageReps has a pixel size of [|ns_image| size] *
-//   scale.
+//   scale_factor.
 bool NSImageStructureMatches(
     NSImage* ns_image,
     int width,
     int height,
-    const std::vector<float>& scales) {
+    const std::vector<ui::ScaleFactor>& scale_factors) {
   if (!ns_image ||
       [ns_image size].width != width ||
       [ns_image size].height != height ||
-      [ns_image representations].count != scales.size()) {
+      [ns_image representations].count != scale_factors.size()) {
     return false;
   }
 
-  for (size_t i = 0; i < scales.size(); ++i) {
-    float scale = scales[i];
+  for (size_t i = 0; i < scale_factors.size(); ++i) {
+    float scale = ui::GetScaleFactorScale(scale_factors[i]);
     bool found_match = false;
     for (size_t j = 0; j < [ns_image representations].count; ++j) {
       NSImageRep* ns_image_rep = [[ns_image representations] objectAtIndex:j];
       if (ns_image_rep &&
           [ns_image_rep pixelsWide] == width * scale &&
           [ns_image_rep pixelsHigh] == height * scale) {
         found_match = true;
         break;
       }
     }
@@ skipping 18 matching lines @@
                   bytesPerRow:0
                  bitsPerPixel:0]
       autorelease];
   unsigned char* image_rep_data = [*image_rep bitmapData];
   for (int i = 0; i < width * height * 3; ++i)
     image_rep_data[i] = 255;
 }
 
 class ImageMacTest : public testing::Test {
  public:
-  ImageMacTest() {
-    gfx::ImageSkia::SetSupportedScales(gfx::test::Get1xAnd2xScales());
+  ImageMacTest()
+      : supported_scale_factors_(gfx::test::Get1xAnd2xScaleFactors()) {
   }
 
   virtual ~ImageMacTest() {
   }
 
  private:
+  ui::test::ScopedSetSupportedScaleFactors supported_scale_factors_;
+
   DISALLOW_COPY_AND_ASSIGN(ImageMacTest);
 };
 
 namespace gt = gfx::test;
 
 TEST_F(ImageMacTest, MultiResolutionNSImageToImageSkia) {
   const int kWidth1x = 10;
   const int kHeight1x = 12;
   const int kWidth2x = 20;
   const int kHeight2x = 24;
 
   NSBitmapImageRep* ns_image_rep1;
   BitmapImageRep(kWidth1x, kHeight1x, &ns_image_rep1);
   NSBitmapImageRep* ns_image_rep2;
   BitmapImageRep(kWidth2x, kHeight2x, &ns_image_rep2);
   base::scoped_nsobject<NSImage> ns_image(
       [[NSImage alloc] initWithSize:NSMakeSize(kWidth1x, kHeight1x)]);
   [ns_image addRepresentation:ns_image_rep1];
   [ns_image addRepresentation:ns_image_rep2];
 
   gfx::Image image(ns_image.release());
 
   EXPECT_EQ(1u, image.RepresentationCount());
 
   const gfx::ImageSkia* image_skia = image.ToImageSkia();
 
-  std::vector<float> scales;
-  scales.push_back(1.0f);
-  scales.push_back(2.0f);
+  std::vector<ui::ScaleFactor> scale_factors;
+  scale_factors.push_back(ui::SCALE_FACTOR_100P);
+  scale_factors.push_back(ui::SCALE_FACTOR_200P);
   EXPECT_TRUE(gt::ImageSkiaStructureMatches(*image_skia, kWidth1x, kHeight1x,
-                                            scales));
+                                            scale_factors));
 
   // ToImageSkia should create a second representation.
   EXPECT_EQ(2u, image.RepresentationCount());
 }
 
 // Test that convertng to an ImageSkia from an NSImage with scale factors
 // other than 1x and 2x results in an ImageSkia with scale factors 1x and
 // 2x;
 TEST_F(ImageMacTest, UnalignedMultiResolutionNSImageToImageSkia) {
   const int kWidth1x = 10;
   const int kHeight1x= 12;
   const int kWidth4x = 40;
   const int kHeight4x = 48;
 
   NSBitmapImageRep* ns_image_rep4;
   BitmapImageRep(kWidth4x, kHeight4x, &ns_image_rep4);
   base::scoped_nsobject<NSImage> ns_image(
       [[NSImage alloc] initWithSize:NSMakeSize(kWidth1x, kHeight1x)]);
   [ns_image addRepresentation:ns_image_rep4];
 
   gfx::Image image(ns_image.release());
 
   EXPECT_EQ(1u, image.RepresentationCount());
 
   const gfx::ImageSkia* image_skia = image.ToImageSkia();
 
-  std::vector<float> scales;
-  scales.push_back(1.0f);
-  scales.push_back(2.0f);
+  std::vector<ui::ScaleFactor> scale_factors;
+  scale_factors.push_back(ui::SCALE_FACTOR_100P);
+  scale_factors.push_back(ui::SCALE_FACTOR_200P);
   EXPECT_TRUE(gt::ImageSkiaStructureMatches(*image_skia, kWidth1x, kHeight1x,
-                                            scales));
+                                            scale_factors));
 
   // ToImageSkia should create a second representation.
   EXPECT_EQ(2u, image.RepresentationCount());
 }
 
 TEST_F(ImageMacTest, MultiResolutionImageSkiaToNSImage) {
   const int kWidth1x = 10;
   const int kHeight1x= 12;
   const int kWidth2x = 20;
   const int kHeight2x = 24;
 
   gfx::ImageSkia image_skia;
   image_skia.AddRepresentation(gfx::ImageSkiaRep(
-      gt::CreateBitmap(kWidth1x, kHeight1x), 1.0f));
+      gt::CreateBitmap(kWidth1x, kHeight1x), ui::SCALE_FACTOR_100P));
   image_skia.AddRepresentation(gfx::ImageSkiaRep(
-      gt::CreateBitmap(kWidth2x, kHeight2x), 2.0f));
+      gt::CreateBitmap(kWidth2x, kHeight2x), ui::SCALE_FACTOR_200P));
 
   gfx::Image image(image_skia);
 
   EXPECT_EQ(1u, image.RepresentationCount());
   EXPECT_EQ(2u, image.ToImageSkia()->image_reps().size());
 
   NSImage* ns_image = image.ToNSImage();
 
-  std::vector<float> scales;
-  scales.push_back(1.0f);
-  scales.push_back(2.0f);
-  EXPECT_TRUE(NSImageStructureMatches(ns_image, kWidth1x, kHeight1x, scales));
+  std::vector<ui::ScaleFactor> scale_factors;
+  scale_factors.push_back(ui::SCALE_FACTOR_100P);
+  scale_factors.push_back(ui::SCALE_FACTOR_200P);
+  EXPECT_TRUE(NSImageStructureMatches(ns_image, kWidth1x, kHeight1x,
+                                      scale_factors));
 
   // Request for NSImage* should create a second representation.
   EXPECT_EQ(2u, image.RepresentationCount());
 }
 
 TEST_F(ImageMacTest, MultiResolutionPNGToNSImage) {
   const int kSize1x = 25;
   const int kSize2x = 50;
 
   scoped_refptr<base::RefCountedMemory> bytes1x = gt::CreatePNGBytes(kSize1x);
   scoped_refptr<base::RefCountedMemory> bytes2x = gt::CreatePNGBytes(kSize2x);
   std::vector<gfx::ImagePNGRep> image_png_reps;
-  image_png_reps.push_back(gfx::ImagePNGRep(bytes1x, 1.0f));
-  image_png_reps.push_back(gfx::ImagePNGRep(bytes2x, 2.0f));
+  image_png_reps.push_back(gfx::ImagePNGRep(bytes1x, ui::SCALE_FACTOR_100P));
+  image_png_reps.push_back(gfx::ImagePNGRep(bytes2x, ui::SCALE_FACTOR_200P));
 
   gfx::Image image(image_png_reps);
 
   NSImage* ns_image = image.ToNSImage();
-  std::vector<float> scales;
-  scales.push_back(1.0f);
-  scales.push_back(2.0f);
-  EXPECT_TRUE(NSImageStructureMatches(ns_image, kSize1x, kSize1x, scales));
+  std::vector<ui::ScaleFactor> scale_factors;
+  scale_factors.push_back(ui::SCALE_FACTOR_100P);
+  scale_factors.push_back(ui::SCALE_FACTOR_200P);
+  EXPECT_TRUE(NSImageStructureMatches(ns_image, kSize1x, kSize1x,
+                                      scale_factors));
 
   // Converting from PNG to NSImage should not go through ImageSkia.
   EXPECT_FALSE(image.HasRepresentation(gfx::Image::kImageRepSkia));
 
   // Convert to ImageSkia to check pixel contents of NSImageReps.
   gfx::ImageSkia image_skia = gfx::ImageSkiaFromNSImage(ns_image);
   EXPECT_TRUE(gt::IsEqual(bytes1x,
-      image_skia.GetRepresentation(1.0f).sk_bitmap()));
+      image_skia.GetRepresentation(ui::SCALE_FACTOR_100P).sk_bitmap()));
   EXPECT_TRUE(gt::IsEqual(bytes2x,
-      image_skia.GetRepresentation(2.0f).sk_bitmap()));
+      image_skia.GetRepresentation(ui::SCALE_FACTOR_200P).sk_bitmap()));
 }
 
 } // namespace