image_unittest_util.cc revision 68043e1e95eeb07d5cae7aca370b26518b0867d6 
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(TOOLKIT_GTK)
19#include <gtk/gtk.h>
20#include "ui/gfx/gtk_util.h"
21#elif defined(OS_IOS)
22#include "base/mac/foundation_util.h"
23#include "base/mac/scoped_cftyperef.h"
24#include "skia/ext/skia_utils_ios.h"
25#elif defined(OS_MACOSX)
26#include "base/mac/mac_util.h"
27#include "skia/ext/skia_utils_mac.h"
28#endif
29
30namespace gfx {
31namespace test {
32
33namespace {
34
35bool ColorComponentsClose(SkColor component1, SkColor component2) {
36  int c1 = static_cast<int>(component1);
37  int c2 = static_cast<int>(component2);
38  return std::abs(c1 - c2) <= 40;
39}
40
41bool ColorsClose(SkColor color1, SkColor color2) {
42  // Be tolerant of floating point rounding and lossy color space conversions.
43  return ColorComponentsClose(SkColorGetR(color1), SkColorGetR(color2)) &&
44         ColorComponentsClose(SkColorGetG(color1), SkColorGetG(color2)) &&
45         ColorComponentsClose(SkColorGetB(color1), SkColorGetB(color2)) &&
46         ColorComponentsClose(SkColorGetA(color1), SkColorGetA(color2));
47}
48
49}  // namespace
50
51std::vector<float> Get1xAnd2xScales() {
52  std::vector<float> scales;
53  scales.push_back(1.0f);
54  scales.push_back(2.0f);
55  return scales;
56}
57
58const SkBitmap CreateBitmap(int width, int height) {
59  SkBitmap bitmap;
60  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
61  bitmap.allocPixels();
62  bitmap.eraseRGB(0, 255, 0);
63  return bitmap;
64}
65
66gfx::ImageSkia CreateImageSkia(int width, int height) {
67  return gfx::ImageSkia::CreateFrom1xBitmap(CreateBitmap(width, height));
68}
69
70scoped_refptr<base::RefCountedMemory> CreatePNGBytes(int edge_size) {
71  SkBitmap bitmap = CreateBitmap(edge_size, edge_size);
72  scoped_refptr<base::RefCountedBytes> bytes(new base::RefCountedBytes());
73  PNGCodec::EncodeBGRASkBitmap(bitmap, false, &bytes->data());
74  return bytes;
75}
76
77gfx::Image CreateImage() {
78  return CreateImage(100, 50);
79}
80
81gfx::Image CreateImage(int width, int height) {
82  return gfx::Image::CreateFrom1xBitmap(CreateBitmap(width, height));
83}
84
85bool IsEqual(const gfx::Image& img1, const gfx::Image& img2) {
86  std::vector<gfx::ImageSkiaRep> img1_reps = img1.AsImageSkia().image_reps();
87  gfx::ImageSkia image_skia2 = img2.AsImageSkia();
88  if (image_skia2.image_reps().size() != img1_reps.size())
89    return false;
90
91  for (size_t i = 0; i < img1_reps.size(); ++i) {
92    float scale = img1_reps[i].scale();
93    const gfx::ImageSkiaRep& image_rep2 = image_skia2.GetRepresentation(scale);
94    if (image_rep2.scale() != scale ||
95        !IsEqual(img1_reps[i].sk_bitmap(), image_rep2.sk_bitmap())) {
96      return false;
97    }
98  }
99  return true;
100}
101
102bool IsEqual(const SkBitmap& bmp1, const SkBitmap& bmp2) {
103  if (bmp1.isNull() && bmp2.isNull())
104    return true;
105
106  if (bmp1.width() != bmp2.width() ||
107      bmp1.height() != bmp2.height() ||
108      bmp1.config() != SkBitmap::kARGB_8888_Config ||
109      bmp2.config() != SkBitmap::kARGB_8888_Config) {
110    return false;
111  }
112
113  SkAutoLockPixels lock1(bmp1);
114  SkAutoLockPixels lock2(bmp2);
115  if (!bmp1.getPixels() || !bmp2.getPixels())
116    return false;
117
118  for (int y = 0; y < bmp1.height(); ++y) {
119    for (int x = 0; x < bmp1.width(); ++x) {
120      if (!ColorsClose(bmp1.getColor(x,y), bmp2.getColor(x,y)))
121        return false;
122    }
123  }
124
125  return true;
126}
127
128bool IsEqual(const scoped_refptr<base::RefCountedMemory>& bytes,
129             const SkBitmap& bitmap) {
130  SkBitmap decoded;
131  if (!bytes.get() ||
132      !PNGCodec::Decode(bytes->front(), bytes->size(), &decoded)) {
133    return bitmap.isNull();
134  }
135
136  return IsEqual(bitmap, decoded);
137}
138
139void CheckImageIndicatesPNGDecodeFailure(const gfx::Image& image) {
140  SkBitmap bitmap = image.AsBitmap();
141  EXPECT_FALSE(bitmap.isNull());
142  EXPECT_LE(16, bitmap.width());
143  EXPECT_LE(16, bitmap.height());
144  SkAutoLockPixels auto_lock(bitmap);
145  CheckColors(bitmap.getColor(10, 10), SK_ColorRED);
146}
147
148bool ImageSkiaStructureMatches(
149    const gfx::ImageSkia& image_skia,
150    int width,
151    int height,
152    const std::vector<float>& scales) {
153  if (image_skia.isNull() ||
154      image_skia.width() != width ||
155      image_skia.height() != height ||
156      image_skia.image_reps().size() != scales.size()) {
157    return false;
158  }
159
160  for (size_t i = 0; i < scales.size(); ++i) {
161    gfx::ImageSkiaRep image_rep =
162        image_skia.GetRepresentation(scales[i]);
163    if (image_rep.is_null() || image_rep.scale() != scales[i])
164      return false;
165
166    if (image_rep.pixel_width() != static_cast<int>(width * scales[i]) ||
167        image_rep.pixel_height() != static_cast<int>(height * scales[i])) {
168      return false;
169    }
170  }
171  return true;
172}
173
174bool IsEmpty(const gfx::Image& image) {
175  const SkBitmap& bmp = *image.ToSkBitmap();
176  return bmp.isNull() ||
177         (bmp.width() == 0 && bmp.height() == 0);
178}
179
180PlatformImage CreatePlatformImage() {
181  const SkBitmap bitmap(CreateBitmap(25, 25));
182#if defined(OS_IOS)
183  float scale = ImageSkia::GetMaxSupportedScale();
184
185  base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
186      CGColorSpaceCreateDeviceRGB());
187  UIImage* image =
188      gfx::SkBitmapToUIImageWithColorSpace(bitmap, scale, color_space);
189  base::mac::NSObjectRetain(image);
190  return image;
191#elif defined(OS_MACOSX)
192  NSImage* image = gfx::SkBitmapToNSImage(bitmap);
193  base::mac::NSObjectRetain(image);
194  return image;
195#elif defined(TOOLKIT_GTK)
196  return gfx::GdkPixbufFromSkBitmap(bitmap);
197#else
198  return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
199#endif
200}
201
202gfx::Image::RepresentationType GetPlatformRepresentationType() {
203#if defined(OS_IOS)
204  return gfx::Image::kImageRepCocoaTouch;
205#elif defined(OS_MACOSX)
206  return gfx::Image::kImageRepCocoa;
207#elif defined(TOOLKIT_GTK)
208  return gfx::Image::kImageRepGdk;
209#else
210  return gfx::Image::kImageRepSkia;
211#endif
212}
213
214PlatformImage ToPlatformType(const gfx::Image& image) {
215#if defined(OS_IOS)
216  return image.ToUIImage();
217#elif defined(OS_MACOSX)
218  return image.ToNSImage();
219#elif defined(TOOLKIT_GTK)
220  return image.ToGdkPixbuf();
221#else
222  return image.AsImageSkia();
223#endif
224}
225
226PlatformImage CopyPlatformType(const gfx::Image& image) {
227#if defined(OS_IOS)
228  return image.CopyUIImage();
229#elif defined(OS_MACOSX)
230  return image.CopyNSImage();
231#elif defined(TOOLKIT_GTK)
232  return image.CopyGdkPixbuf();
233#else
234  return image.AsImageSkia();
235#endif
236}
237
238#if defined(OS_MACOSX)
239// Defined in image_unittest_util_mac.mm.
240#elif defined(TOOLKIT_GTK)
241SkColor GetPlatformImageColor(PlatformImage image, int x, int y) {
242  int n_channels = gdk_pixbuf_get_n_channels(image);
243  int rowstride = gdk_pixbuf_get_rowstride(image);
244  guchar* gdk_pixels = gdk_pixbuf_get_pixels(image);
245
246  guchar* pixel = gdk_pixels + (y * rowstride) + (x * n_channels);
247  guchar alpha = gdk_pixbuf_get_has_alpha(image) ? pixel[3] : 255;
248  return SkColorSetARGB(alpha, pixel[0], pixel[1], pixel[2]);
249}
250#else
251SkColor GetPlatformImageColor(PlatformImage image, int x, int y) {
252  SkBitmap bitmap = *image.bitmap();
253  SkAutoLockPixels auto_lock(bitmap);
254  return bitmap.getColor(x, y);
255}
256#endif
257
258void CheckColors(SkColor color1, SkColor color2) {
259  EXPECT_TRUE(ColorsClose(color1, color2));
260}
261
262void CheckIsTransparent(SkColor color) {
263  EXPECT_LT(SkColorGetA(color) / 255.0, 0.05);
264}
265
266bool IsPlatformImageValid(PlatformImage image) {
267#if defined(OS_MACOSX) || defined(TOOLKIT_GTK)
268  return image != NULL;
269#else
270  return !image.isNull();
271#endif
272}
273
274bool PlatformImagesEqual(PlatformImage image1, PlatformImage image2) {
275#if defined(OS_MACOSX) || defined(TOOLKIT_GTK)
276  return image1 == image2;
277#else
278  return image1.BackedBySameObjectAs(image2);
279#endif
280}
281
282}  // namespace test
283}  // namespace gfx
284