image_unittest_util.cc revision a02191e04bc25c4935f804f2c080ae28663d096d 
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
27namespace gfx {
28namespace test {
29
30namespace {
31
32bool 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
38bool 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
48std::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
55const SkBitmap CreateBitmap(int width, int height) {
56  SkBitmap bitmap;
57  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
58  bitmap.allocPixels();
59  bitmap.eraseRGB(0, 255, 0);
60  return bitmap;
61}
62
63gfx::ImageSkia CreateImageSkia(int width, int height) {
64  return gfx::ImageSkia::CreateFrom1xBitmap(CreateBitmap(width, height));
65}
66
67scoped_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
74gfx::Image CreateImage() {
75  return CreateImage(100, 50);
76}
77
78gfx::Image CreateImage(int width, int height) {
79  return gfx::Image::CreateFrom1xBitmap(CreateBitmap(width, height));
80}
81
82bool 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
99bool 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
125bool 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
136void 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
145bool 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
171bool IsEmpty(const gfx::Image& image) {
172  const SkBitmap& bmp = *image.ToSkBitmap();
173  return bmp.isNull() ||
174         (bmp.width() == 0 && bmp.height() == 0);
175}
176
177PlatformImage 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
197gfx::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
207PlatformImage 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
217PlatformImage 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
230SkColor 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
237void CheckColors(SkColor color1, SkColor color2) {
238  EXPECT_TRUE(ColorsClose(color1, color2));
239}
240
241void CheckIsTransparent(SkColor color) {
242  EXPECT_LT(SkColorGetA(color) / 255.0, 0.05);
243}
244
245bool IsPlatformImageValid(PlatformImage image) {
246#if defined(OS_MACOSX)
247  return image != NULL;
248#else
249  return !image.isNull();
250#endif
251}
252
253bool 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
263