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 "SkBitmap.h"
9 #include "SkMallocPixelRef.h"
10 #include "SkRandom.h"
11 #include "Test.h"
12
test_peekpixels(skiatest::Reporter * reporter)13 static void test_peekpixels(skiatest::Reporter* reporter) {
14 const SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
15
16 SkPixmap pmap;
17 SkBitmap bm;
18
19 // empty should return false
20 REPORTER_ASSERT(reporter, !bm.peekPixels(nullptr));
21 REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));
22
23 // no pixels should return false
24 bm.setInfo(SkImageInfo::MakeN32Premul(10, 10));
25 REPORTER_ASSERT(reporter, !bm.peekPixels(nullptr));
26 REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));
27
28 // real pixels should return true
29 bm.allocPixels(info);
30 REPORTER_ASSERT(reporter, bm.peekPixels(nullptr));
31 REPORTER_ASSERT(reporter, bm.peekPixels(&pmap));
32 REPORTER_ASSERT(reporter, pmap.info() == bm.info());
33 REPORTER_ASSERT(reporter, pmap.addr() == bm.getPixels());
34 REPORTER_ASSERT(reporter, pmap.rowBytes() == bm.rowBytes());
35 REPORTER_ASSERT(reporter, pmap.ctable() == bm.getColorTable());
36 }
37
38 // https://code.google.com/p/chromium/issues/detail?id=446164
test_bigalloc(skiatest::Reporter * reporter)39 static void test_bigalloc(skiatest::Reporter* reporter) {
40 const int width = 0x40000001;
41 const int height = 0x00000096;
42 const SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
43
44 SkBitmap bm;
45 REPORTER_ASSERT(reporter, !bm.tryAllocPixels(info));
46
47 SkPixelRef* pr = SkMallocPixelRef::NewAllocate(info, info.minRowBytes(), nullptr);
48 REPORTER_ASSERT(reporter, !pr);
49 }
50
test_allocpixels(skiatest::Reporter * reporter)51 static void test_allocpixels(skiatest::Reporter* reporter) {
52 const int width = 10;
53 const int height = 10;
54 const SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
55 const size_t explicitRowBytes = info.minRowBytes() + 24;
56
57 SkBitmap bm;
58 bm.setInfo(info);
59 REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
60 bm.allocPixels();
61 REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
62 bm.reset();
63 bm.allocPixels(info);
64 REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
65
66 bm.setInfo(info, explicitRowBytes);
67 REPORTER_ASSERT(reporter, explicitRowBytes == bm.rowBytes());
68 bm.allocPixels();
69 REPORTER_ASSERT(reporter, explicitRowBytes == bm.rowBytes());
70 bm.reset();
71 bm.allocPixels(info, explicitRowBytes);
72 REPORTER_ASSERT(reporter, explicitRowBytes == bm.rowBytes());
73
74 bm.reset();
75 bm.setInfo(info, 0);
76 REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
77 bm.reset();
78 bm.allocPixels(info, 0);
79 REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
80
81 bm.reset();
82 bool success = bm.setInfo(info, info.minRowBytes() - 1); // invalid for 32bit
83 REPORTER_ASSERT(reporter, !success);
84 REPORTER_ASSERT(reporter, bm.isNull());
85 }
86
test_bigwidth(skiatest::Reporter * reporter)87 static void test_bigwidth(skiatest::Reporter* reporter) {
88 SkBitmap bm;
89 int width = 1 << 29; // *4 will be the high-bit of 32bit int
90
91 SkImageInfo info = SkImageInfo::MakeA8(width, 1);
92 REPORTER_ASSERT(reporter, bm.setInfo(info));
93 REPORTER_ASSERT(reporter, bm.setInfo(info.makeColorType(kRGB_565_SkColorType)));
94
95 // for a 4-byte config, this width will compute a rowbytes of 0x80000000,
96 // which does not fit in a int32_t. setConfig should detect this, and fail.
97
98 // TODO: perhaps skia can relax this, and only require that rowBytes fit
99 // in a uint32_t (or larger), but for now this is the constraint.
100
101 REPORTER_ASSERT(reporter, !bm.setInfo(info.makeColorType(kN32_SkColorType)));
102 }
103
104 /**
105 * This test contains basic sanity checks concerning bitmaps.
106 */
DEF_TEST(Bitmap,reporter)107 DEF_TEST(Bitmap, reporter) {
108 // Zero-sized bitmaps are allowed
109 for (int width = 0; width < 2; ++width) {
110 for (int height = 0; height < 2; ++height) {
111 SkBitmap bm;
112 bool setConf = bm.setInfo(SkImageInfo::MakeN32Premul(width, height));
113 REPORTER_ASSERT(reporter, setConf);
114 if (setConf) {
115 bm.allocPixels();
116 }
117 REPORTER_ASSERT(reporter, SkToBool(width & height) != bm.empty());
118 }
119 }
120
121 test_bigwidth(reporter);
122 test_allocpixels(reporter);
123 test_bigalloc(reporter);
124 test_peekpixels(reporter);
125 }
126
127 /**
128 * This test checks that getColor works for both swizzles.
129 */
DEF_TEST(Bitmap_getColor_Swizzle,r)130 DEF_TEST(Bitmap_getColor_Swizzle, r) {
131 SkBitmap source;
132 source.allocN32Pixels(1,1);
133 source.eraseColor(SK_ColorRED);
134 SkColorType colorTypes[] = {
135 kRGBA_8888_SkColorType,
136 kBGRA_8888_SkColorType,
137 };
138 for (SkColorType ct : colorTypes) {
139 SkBitmap copy;
140 if (!source.copyTo(©, ct)) {
141 ERRORF(r, "SkBitmap::copy failed %d", (int)ct);
142 continue;
143 }
144 SkAutoLockPixels autoLockPixels1(copy);
145 SkAutoLockPixels autoLockPixels2(source);
146 REPORTER_ASSERT(r, source.getColor(0, 0) == copy.getColor(0, 0));
147 }
148 }
149
test_erasecolor_premul(skiatest::Reporter * reporter,SkColorType ct,SkColor input,SkColor expected)150 static void test_erasecolor_premul(skiatest::Reporter* reporter, SkColorType ct, SkColor input,
151 SkColor expected) {
152 SkBitmap bm;
153 bm.allocPixels(SkImageInfo::Make(1, 1, ct, kPremul_SkAlphaType));
154 bm.eraseColor(input);
155 INFOF(reporter, "expected: %x actual: %x\n", expected, bm.getColor(0, 0));
156 REPORTER_ASSERT(reporter, bm.getColor(0, 0) == expected);
157 }
158
159 /**
160 * This test checks that eraseColor premultiplies the color correctly.
161 */
DEF_TEST(Bitmap_eraseColor_Premul,r)162 DEF_TEST(Bitmap_eraseColor_Premul, r) {
163 SkColor color = 0x80FF0080;
164 test_erasecolor_premul(r, kAlpha_8_SkColorType, color, 0x80000000);
165 test_erasecolor_premul(r, kRGB_565_SkColorType, color, 0xFF840042);
166 test_erasecolor_premul(r, kARGB_4444_SkColorType, color, 0x88FF0080);
167 test_erasecolor_premul(r, kRGBA_8888_SkColorType, color, color);
168 test_erasecolor_premul(r, kBGRA_8888_SkColorType, color, color);
169 }
170
171 // Test that SkBitmap::ComputeOpaque() is correct for various colortypes.
DEF_TEST(Bitmap_compute_is_opaque,r)172 DEF_TEST(Bitmap_compute_is_opaque, r) {
173 struct {
174 SkColorType fCT;
175 SkAlphaType fAT;
176 } types[] = {
177 { kGray_8_SkColorType, kOpaque_SkAlphaType },
178 { kAlpha_8_SkColorType, kPremul_SkAlphaType },
179 { kARGB_4444_SkColorType, kPremul_SkAlphaType },
180 { kRGB_565_SkColorType, kOpaque_SkAlphaType },
181 { kBGRA_8888_SkColorType, kPremul_SkAlphaType },
182 { kRGBA_8888_SkColorType, kPremul_SkAlphaType },
183 { kRGBA_F16_SkColorType, kPremul_SkAlphaType },
184 };
185 for (auto type : types) {
186 SkBitmap bm;
187 REPORTER_ASSERT(r, !SkBitmap::ComputeIsOpaque(bm));
188
189 bm.allocPixels(SkImageInfo::Make(13, 17, type.fCT, type.fAT));
190 bm.eraseColor(SkColorSetARGB(255, 10, 20, 30));
191 REPORTER_ASSERT(r, SkBitmap::ComputeIsOpaque(bm));
192
193 bm.eraseColor(SkColorSetARGB(128, 255, 255, 255));
194 bool isOpaque = SkBitmap::ComputeIsOpaque(bm);
195 bool shouldBeOpaque = (type.fAT == kOpaque_SkAlphaType);
196 REPORTER_ASSERT(r, isOpaque == shouldBeOpaque);
197 }
198 }
199
200 // Test that erase+getColor round trips with RGBA_F16 pixels.
DEF_TEST(Bitmap_erase_f16_erase_getColor,r)201 DEF_TEST(Bitmap_erase_f16_erase_getColor, r) {
202 SkRandom random;
203 SkPixmap pm;
204 SkBitmap bm;
205 bm.allocPixels(SkImageInfo::Make(1, 1, kRGBA_F16_SkColorType, kPremul_SkAlphaType));
206 REPORTER_ASSERT(r, bm.peekPixels(&pm));
207 for (unsigned i = 0; i < 0x100; ++i) {
208 // Test all possible values of blue component.
209 SkColor color1 = (SkColor)((random.nextU() & 0xFFFFFF00) | i);
210 // Test all possible values of alpha component.
211 SkColor color2 = (SkColor)((random.nextU() & 0x00FFFFFF) | (i << 24));
212 for (SkColor color : {color1, color2}) {
213 pm.erase(color);
214 if (SkColorGetA(color) != 0) {
215 REPORTER_ASSERT(r, color == pm.getColor(0, 0));
216 } else {
217 REPORTER_ASSERT(r, 0 == SkColorGetA(pm.getColor(0, 0)));
218 }
219 }
220 }
221 }
222
223