1 /*
2 * Copyright 2013 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "include/core/SkBitmap.h"
9 #include "include/utils/SkRandom.h"
10 #include "src/core/SkMipmap.h"
11 #include "tests/Test.h"
12 #include "tools/Resources.h"
13
make_bitmap(SkBitmap * bm,int width,int height)14 static void make_bitmap(SkBitmap* bm, int width, int height) {
15 bm->allocN32Pixels(width, height);
16 bm->eraseColor(SK_ColorWHITE);
17 }
18
DEF_TEST(MipMap,reporter)19 DEF_TEST(MipMap, reporter) {
20 SkBitmap bm;
21 SkRandom rand;
22
23 for (int i = 0; i < 500; ++i) {
24 int width = 1 + rand.nextU() % 1000;
25 int height = 1 + rand.nextU() % 1000;
26 make_bitmap(&bm, width, height);
27 sk_sp<SkMipmap> mm(SkMipmap::Build(bm, nullptr));
28
29 REPORTER_ASSERT(reporter, mm->countLevels() == SkMipmap::ComputeLevelCount(width, height));
30 REPORTER_ASSERT(reporter, !mm->extractLevel(SkSize::Make(SK_Scalar1, SK_Scalar1),
31 nullptr));
32 REPORTER_ASSERT(reporter, !mm->extractLevel(SkSize::Make(SK_Scalar1 * 2, SK_Scalar1 * 2),
33 nullptr));
34
35 SkMipmap::Level prevLevel;
36 sk_bzero(&prevLevel, sizeof(prevLevel));
37
38 SkScalar scale = SK_Scalar1;
39 for (int j = 0; j < 30; ++j) {
40 scale = scale * 2 / 3;
41
42 SkMipmap::Level level;
43 if (mm->extractLevel(SkSize::Make(scale, scale), &level)) {
44 REPORTER_ASSERT(reporter, level.fPixmap.addr());
45 REPORTER_ASSERT(reporter, level.fPixmap.width() > 0);
46 REPORTER_ASSERT(reporter, level.fPixmap.height() > 0);
47 REPORTER_ASSERT(reporter, (int)level.fPixmap.rowBytes() >= level.fPixmap.width() * 4);
48
49 if (prevLevel.fPixmap.addr()) {
50 REPORTER_ASSERT(reporter, level.fPixmap.width() <= prevLevel.fPixmap.width());
51 REPORTER_ASSERT(reporter, level.fPixmap.height() <= prevLevel.fPixmap.height());
52 }
53 prevLevel = level;
54 }
55 }
56 }
57 }
58
test_mipmap_generation(int width,int height,int expectedMipLevelCount,skiatest::Reporter * reporter)59 static void test_mipmap_generation(int width, int height, int expectedMipLevelCount,
60 skiatest::Reporter* reporter) {
61 SkBitmap bm;
62 bm.allocN32Pixels(width, height);
63 bm.eraseColor(SK_ColorWHITE);
64 sk_sp<SkMipmap> mm(SkMipmap::Build(bm, nullptr));
65
66 const int mipLevelCount = mm->countLevels();
67 REPORTER_ASSERT(reporter, mipLevelCount == expectedMipLevelCount);
68 REPORTER_ASSERT(reporter, mipLevelCount == SkMipmap::ComputeLevelCount(width, height));
69 for (int i = 0; i < mipLevelCount; ++i) {
70 SkMipmap::Level level;
71 REPORTER_ASSERT(reporter, mm->getLevel(i, &level));
72 // Make sure the mipmaps contain valid data and that the sizes are correct
73 REPORTER_ASSERT(reporter, level.fPixmap.addr());
74 SkISize size = SkMipmap::ComputeLevelSize(width, height, i);
75 REPORTER_ASSERT(reporter, level.fPixmap.width() == size.width());
76 REPORTER_ASSERT(reporter, level.fPixmap.height() == size.height());
77
78 // + 1 because SkMipmap does not include the base mipmap level.
79 int twoToTheMipLevel = 1 << (i + 1);
80 int currentWidth = width / twoToTheMipLevel;
81 int currentHeight = height / twoToTheMipLevel;
82 REPORTER_ASSERT(reporter, level.fPixmap.width() == currentWidth);
83 REPORTER_ASSERT(reporter, level.fPixmap.height() == currentHeight);
84 }
85 }
86
DEF_TEST(MipMap_DirectLevelAccess,reporter)87 DEF_TEST(MipMap_DirectLevelAccess, reporter) {
88 // create mipmap with invalid size
89 {
90 // SkMipmap current requires the dimensions be greater than 2x2
91 SkBitmap bm;
92 bm.allocN32Pixels(1, 1);
93 bm.eraseColor(SK_ColorWHITE);
94 sk_sp<SkMipmap> mm(SkMipmap::Build(bm, nullptr));
95
96 REPORTER_ASSERT(reporter, mm == nullptr);
97 }
98
99 // check small mipmap's count and levels
100 // There should be 5 mipmap levels generated:
101 // 16x16, 8x8, 4x4, 2x2, 1x1
102 test_mipmap_generation(32, 32, 5, reporter);
103
104 // check large mipmap's count and levels
105 // There should be 9 mipmap levels generated:
106 // 500x500, 250x250, 125x125, 62x62, 31x31, 15x15, 7x7, 3x3, 1x1
107 test_mipmap_generation(1000, 1000, 9, reporter);
108 }
109
110 struct LevelCountScenario {
111 int fWidth;
112 int fHeight;
113 int fExpectedLevelCount;
114 };
115
DEF_TEST(MipMap_ComputeLevelCount,reporter)116 DEF_TEST(MipMap_ComputeLevelCount, reporter) {
117 const LevelCountScenario tests[] = {
118 // Test mipmaps with negative sizes
119 {-100, 100, 0},
120 {100, -100, 0},
121 {-100, -100, 0},
122
123 // Test mipmaps with 0, 1, 2 as dimensions
124 // (SkMipmap::Build requires a min size of 1)
125 //
126 // 0
127 {0, 100, 0},
128 {100, 0, 0},
129 {0, 0, 0},
130 // 1
131 {1, 100, 6},
132 {100, 1, 6},
133 {1, 1, 0},
134 // 2
135 {2, 100, 6},
136 {100, 2, 6},
137 {2, 2, 1},
138
139 // Test a handful of boundaries such as 63x63 and 64x64
140 {63, 63, 5},
141 {64, 64, 6},
142 {127, 127, 6},
143 {128, 128, 7},
144 {255, 255, 7},
145 {256, 256, 8},
146
147 // Test different dimensions, such as 256x64
148 {64, 129, 7},
149 {255, 32, 7},
150 {500, 1000, 9}
151 };
152
153 for (auto& currentTest : tests) {
154 int levelCount = SkMipmap::ComputeLevelCount(currentTest.fWidth, currentTest.fHeight);
155 REPORTER_ASSERT(reporter, currentTest.fExpectedLevelCount == levelCount);
156 }
157 }
158
159 struct LevelSizeScenario {
160 int fBaseWidth;
161 int fBaseHeight;
162 int fLevel;
163 SkISize fExpectedMipMapLevelSize;
164 };
165
DEF_TEST(MipMap_ComputeLevelSize,reporter)166 DEF_TEST(MipMap_ComputeLevelSize, reporter) {
167 const LevelSizeScenario tests[] = {
168 // Test mipmaps with negative sizes
169 {-100, 100, 0, SkISize::Make(0, 0)},
170 {100, -100, 0, SkISize::Make(0, 0)},
171 {-100, -100, 0, SkISize::Make(0, 0)},
172
173 // Test mipmaps with 0, 1, 2 as dimensions
174 // (SkMipmap::Build requires a min size of 1)
175 //
176 // 0
177 {0, 100, 0, SkISize::Make(0, 0)},
178 {100, 0, 0, SkISize::Make(0, 0)},
179 {0, 0, 0, SkISize::Make(0, 0)},
180 // 1
181
182 {1, 100, 0, SkISize::Make(1, 50)},
183 {100, 1, 0, SkISize::Make(50, 1)},
184 {1, 1, 0, SkISize::Make(0, 0)},
185 // 2
186 {2, 100, 0, SkISize::Make(1, 50)},
187 {100, 2, 1, SkISize::Make(25, 1)},
188 {2, 2, 0, SkISize::Make(1, 1)},
189
190 // Test a handful of cases
191 {63, 63, 2, SkISize::Make(7, 7)},
192 {64, 64, 2, SkISize::Make(8, 8)},
193 {127, 127, 2, SkISize::Make(15, 15)},
194 {64, 129, 3, SkISize::Make(4, 8)},
195 {255, 32, 6, SkISize::Make(1, 1)},
196 {500, 1000, 1, SkISize::Make(125, 250)},
197 };
198
199 for (auto& currentTest : tests) {
200 SkISize levelSize = SkMipmap::ComputeLevelSize(currentTest.fBaseWidth,
201 currentTest.fBaseHeight,
202 currentTest.fLevel);
203 REPORTER_ASSERT(reporter, currentTest.fExpectedMipMapLevelSize == levelSize);
204 }
205 }
206
DEF_TEST(MipMap_F16,reporter)207 DEF_TEST(MipMap_F16, reporter) {
208 SkBitmap bmp;
209 bmp.allocPixels(SkImageInfo::Make(10, 10, kRGBA_F16_SkColorType, kPremul_SkAlphaType));
210 bmp.eraseColor(0);
211 sk_sp<SkMipmap> mipmap(SkMipmap::Build(bmp, nullptr));
212 }
213
214 #include "include/core/SkCanvas.h"
215 #include "include/core/SkSurface.h"
216 #include "src/core/SkMipmapBuilder.h"
217
fill_in_mips(SkMipmapBuilder * builder,sk_sp<SkImage> img)218 static void fill_in_mips(SkMipmapBuilder* builder, sk_sp<SkImage> img) {
219 int count = builder->countLevels();
220 for (int i = 0; i < count; ++i) {
221 SkPixmap pm = builder->level(i);
222 auto surf = SkSurface::MakeRasterDirect(pm);
223 surf->getCanvas()->drawImageRect(img, SkRect::MakeIWH(pm.width(), pm.height()),
224 SkSamplingOptions());
225 }
226 }
227
DEF_TEST(image_mip_factory,reporter)228 DEF_TEST(image_mip_factory, reporter) {
229 // TODO: what do to about lazy images and mipmaps?
230 auto img = GetResourceAsImage("images/mandrill_128.png")->makeRasterImage();
231
232 REPORTER_ASSERT(reporter, !img->hasMipmaps());
233 auto img1 = img->withDefaultMipmaps();
234 REPORTER_ASSERT(reporter, img.get() != img1.get());
235 REPORTER_ASSERT(reporter, img1->hasMipmaps());
236
237 SkMipmapBuilder builder(img->imageInfo());
238 fill_in_mips(&builder, img);
239
240 auto img2 = builder.attachTo(img);
241 REPORTER_ASSERT(reporter, img.get() != img2.get());
242 REPORTER_ASSERT(reporter, img1.get() != img2.get());
243 REPORTER_ASSERT(reporter, img2->hasMipmaps());
244 }
245
246 // Ensure we can't attach mips that don't "match" the image
247 //
DEF_TEST(image_mip_mismatch,reporter)248 DEF_TEST(image_mip_mismatch, reporter) {
249 auto check_fails = [reporter](sk_sp<SkImage> img, const SkImageInfo& info) {
250 SkMipmapBuilder builder(info);
251 fill_in_mips(&builder, img);
252 auto img2 = builder.attachTo(img);
253 // if withMipmaps() succeeds, it returns a new image, otherwise it returns the original
254 REPORTER_ASSERT(reporter, img.get() == img2.get());
255 };
256
257 auto img = GetResourceAsImage("images/mandrill_128.png")->makeRasterImage();
258
259 // check size, colortype, and alphatype
260
261 check_fails(img, img->imageInfo().makeWH(img->width() + 2, img->height() - 3));
262
263 SkASSERT(img->imageInfo().colorType() != kRGB_565_SkColorType);
264 check_fails(img, img->imageInfo().makeColorType(kRGB_565_SkColorType));
265
266 SkASSERT(img->imageInfo().alphaType() != kUnpremul_SkAlphaType);
267 check_fails(img, img->imageInfo().makeAlphaType(kUnpremul_SkAlphaType));
268 }
269
