ui/gfx/image/image_unittest_util.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Because the unit tests for gfx::Image are spread across multiple
   6 // implementation files, this header contains the reusable components.
   7
   8 #include "ui/gfx/image/image_unittest_util.h"
   9
  10 #include <cmath>
  11
  12 #include "base/memory/scoped_ptr.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14 #include "third_party/skia/include/core/SkBitmap.h"
  15 #include "ui/gfx/codec/png_codec.h"
  16 #include "ui/gfx/image/image_skia.h"
  17
  18 #if defined(OS_IOS)
  19 #include "base/mac/foundation_util.h"
  20 #include "base/mac/scoped_cftyperef.h"
  21 #include "skia/ext/skia_utils_ios.h"
  22 #elif defined(OS_MACOSX)
  23 #include "base/mac/mac_util.h"
  24 #include "skia/ext/skia_utils_mac.h"
  25 #endif
  26
  27 namespace gfx {
  28 namespace test {
  29
  30 namespace {
  31
  32 bool ColorComponentsClose(SkColor component1, SkColor component2) {
  33   int c1 = static_cast<int>(component1);
  34   int c2 = static_cast<int>(component2);
  35   return std::abs(c1 - c2) <= 40;
  36 }
  37
  38 bool ColorsClose(SkColor color1, SkColor color2) {
  39   // Be tolerant of floating point rounding and lossy color space conversions.
  40   return ColorComponentsClose(SkColorGetR(color1), SkColorGetR(color2)) &&
  41          ColorComponentsClose(SkColorGetG(color1), SkColorGetG(color2)) &&
  42          ColorComponentsClose(SkColorGetB(color1), SkColorGetB(color2)) &&
  43          ColorComponentsClose(SkColorGetA(color1), SkColorGetA(color2));
  44 }
  45
  46 }  // namespace
  47
  48 std::vector<float> Get1xAnd2xScales() {
  49   std::vector<float> scales;
  50   scales.push_back(1.0f);
  51   scales.push_back(2.0f);
  52   return scales;
  53 }
  54
  55 const SkBitmap CreateBitmap(int width, int height) {
  56   SkBitmap bitmap;
  57   bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
  58   bitmap.allocPixels();
  59   bitmap.eraseARGB(255, 0, 255, 0);
  60   return bitmap;
  61 }
  62
  63 gfx::ImageSkia CreateImageSkia(int width, int height) {
  64   return gfx::ImageSkia::CreateFrom1xBitmap(CreateBitmap(width, height));
  65 }
  66
  67 scoped_refptr<base::RefCountedMemory> CreatePNGBytes(int edge_size) {
  68   SkBitmap bitmap = CreateBitmap(edge_size, edge_size);
  69   scoped_refptr<base::RefCountedBytes> bytes(new base::RefCountedBytes());
  70   PNGCodec::EncodeBGRASkBitmap(bitmap, false, &bytes->data());
  71   return bytes;
  72 }
  73
  74 gfx::Image CreateImage() {
  75   return CreateImage(100, 50);
  76 }
  77
  78 gfx::Image CreateImage(int width, int height) {
  79   return gfx::Image::CreateFrom1xBitmap(CreateBitmap(width, height));
  80 }
  81
  82 bool IsEqual(const gfx::Image& img1, const gfx::Image& img2) {
  83   std::vector<gfx::ImageSkiaRep> img1_reps = img1.AsImageSkia().image_reps();
  84   gfx::ImageSkia image_skia2 = img2.AsImageSkia();
  85   if (image_skia2.image_reps().size() != img1_reps.size())
  86     return false;
  87
  88   for (size_t i = 0; i < img1_reps.size(); ++i) {
  89     float scale = img1_reps[i].scale();
  90     const gfx::ImageSkiaRep& image_rep2 = image_skia2.GetRepresentation(scale);
  91     if (image_rep2.scale() != scale ||
  92         !IsEqual(img1_reps[i].sk_bitmap(), image_rep2.sk_bitmap())) {
  93       return false;
  94     }
  95   }
  96   return true;
  97 }
  98
  99 bool IsEqual(const SkBitmap& bmp1, const SkBitmap& bmp2) {
 100   if (bmp1.isNull() && bmp2.isNull())
 101     return true;
 102
 103   if (bmp1.width() != bmp2.width() ||
 104       bmp1.height() != bmp2.height() ||
 105       bmp1.config() != SkBitmap::kARGB_8888_Config ||
 106       bmp2.config() != SkBitmap::kARGB_8888_Config) {
 107     return false;
 108   }
 109
 110   SkAutoLockPixels lock1(bmp1);
 111   SkAutoLockPixels lock2(bmp2);
 112   if (!bmp1.getPixels() || !bmp2.getPixels())
 113     return false;
 114
 115   for (int y = 0; y < bmp1.height(); ++y) {
 116     for (int x = 0; x < bmp1.width(); ++x) {
 117       if (!ColorsClose(bmp1.getColor(x,y), bmp2.getColor(x,y)))
 118         return false;
 119     }
 120   }
 121
 122   return true;
 123 }
 124
 125 bool IsEqual(const scoped_refptr<base::RefCountedMemory>& bytes,
 126              const SkBitmap& bitmap) {
 127   SkBitmap decoded;
 128   if (!bytes.get() ||
 129       !PNGCodec::Decode(bytes->front(), bytes->size(), &decoded)) {
 130     return bitmap.isNull();
 131   }
 132
 133   return IsEqual(bitmap, decoded);
 134 }
 135
 136 void CheckImageIndicatesPNGDecodeFailure(const gfx::Image& image) {
 137   SkBitmap bitmap = image.AsBitmap();
 138   EXPECT_FALSE(bitmap.isNull());
 139   EXPECT_LE(16, bitmap.width());
 140   EXPECT_LE(16, bitmap.height());
 141   SkAutoLockPixels auto_lock(bitmap);
 142   CheckColors(bitmap.getColor(10, 10), SK_ColorRED);
 143 }
 144
 145 bool ImageSkiaStructureMatches(
 146     const gfx::ImageSkia& image_skia,
 147     int width,
 148     int height,
 149     const std::vector<float>& scales) {
 150   if (image_skia.isNull() ||
 151       image_skia.width() != width ||
 152       image_skia.height() != height ||
 153       image_skia.image_reps().size() != scales.size()) {
 154     return false;
 155   }
 156
 157   for (size_t i = 0; i < scales.size(); ++i) {
 158     gfx::ImageSkiaRep image_rep =
 159         image_skia.GetRepresentation(scales[i]);
 160     if (image_rep.is_null() || image_rep.scale() != scales[i])
 161       return false;
 162
 163     if (image_rep.pixel_width() != static_cast<int>(width * scales[i]) ||
 164         image_rep.pixel_height() != static_cast<int>(height * scales[i])) {
 165       return false;
 166     }
 167   }
 168   return true;
 169 }
 170
 171 bool IsEmpty(const gfx::Image& image) {
 172   const SkBitmap& bmp = *image.ToSkBitmap();
 173   return bmp.isNull() ||
 174          (bmp.width() == 0 && bmp.height() == 0);
 175 }
 176
 177 PlatformImage CreatePlatformImage() {
 178   const SkBitmap bitmap(CreateBitmap(25, 25));
 179 #if defined(OS_IOS)
 180   float scale = ImageSkia::GetMaxSupportedScale();
 181
 182   base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
 183       CGColorSpaceCreateDeviceRGB());
 184   UIImage* image =
 185       gfx::SkBitmapToUIImageWithColorSpace(bitmap, scale, color_space);
 186   base::mac::NSObjectRetain(image);
 187   return image;
 188 #elif defined(OS_MACOSX)
 189   NSImage* image = gfx::SkBitmapToNSImage(bitmap);
 190   base::mac::NSObjectRetain(image);
 191   return image;
 192 #else
 193   return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
 194 #endif
 195 }
 196
 197 gfx::Image::RepresentationType GetPlatformRepresentationType() {
 198 #if defined(OS_IOS)
 199   return gfx::Image::kImageRepCocoaTouch;
 200 #elif defined(OS_MACOSX)
 201   return gfx::Image::kImageRepCocoa;
 202 #else
 203   return gfx::Image::kImageRepSkia;
 204 #endif
 205 }
 206
 207 PlatformImage ToPlatformType(const gfx::Image& image) {
 208 #if defined(OS_IOS)
 209   return image.ToUIImage();
 210 #elif defined(OS_MACOSX)
 211   return image.ToNSImage();
 212 #else
 213   return image.AsImageSkia();
 214 #endif
 215 }
 216
 217 PlatformImage CopyPlatformType(const gfx::Image& image) {
 218 #if defined(OS_IOS)
 219   return image.CopyUIImage();
 220 #elif defined(OS_MACOSX)
 221   return image.CopyNSImage();
 222 #else
 223   return image.AsImageSkia();
 224 #endif
 225 }
 226
 227 #if defined(OS_MACOSX)
 228 // Defined in image_unittest_util_mac.mm.
 229 #else
 230 SkColor GetPlatformImageColor(PlatformImage image, int x, int y) {
 231   SkBitmap bitmap = *image.bitmap();
 232   SkAutoLockPixels auto_lock(bitmap);
 233   return bitmap.getColor(x, y);
 234 }
 235 #endif
 236
 237 void CheckColors(SkColor color1, SkColor color2) {
 238   EXPECT_TRUE(ColorsClose(color1, color2));
 239 }
 240
 241 void CheckIsTransparent(SkColor color) {
 242   EXPECT_LT(SkColorGetA(color) / 255.0, 0.05);
 243 }
 244
 245 bool IsPlatformImageValid(PlatformImage image) {
 246 #if defined(OS_MACOSX)
 247   return image != NULL;
 248 #else
 249   return !image.isNull();
 250 #endif
 251 }
 252
 253 bool PlatformImagesEqual(PlatformImage image1, PlatformImage image2) {
 254 #if defined(OS_MACOSX)
 255   return image1 == image2;
 256 #else
 257   return image1.BackedBySameObjectAs(image2);
 258 #endif
 259 }
 260
 261 }  // namespace test
 262 }  // namespace gfx