1 /*
2 * Copyright 2011 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/core/SkColor.h"
10 #include "include/core/SkColorSpace.h"
11 #include "include/core/SkImageInfo.h"
12 #include "include/core/SkPoint.h"
13 #include "include/core/SkRect.h"
14 #include "include/core/SkRefCnt.h"
15 #include "include/core/SkSize.h"
16 #include "include/core/SkTypes.h"
17 #include "src/core/SkOpts.h"
18 #include "tests/Test.h"
19 #include "tools/ToolUtils.h"
20
init_src(const SkBitmap & bitmap)21 static void init_src(const SkBitmap& bitmap) {
22 if (bitmap.getPixels()) {
23 bitmap.eraseColor(SK_ColorWHITE);
24 }
25 }
26
27 struct Pair {
28 SkColorType fColorType;
29 const char* fValid;
30 };
31
32 // Utility functions for copyPixelsTo()/copyPixelsFrom() tests.
33 // getPixel()
34 // setPixel()
35 // getSkConfigName()
36 // struct Coordinates
37 // reportCopyVerification()
38 // writeCoordPixels()
39
40 // Helper struct to contain pixel locations, while avoiding need for STL.
41 struct Coordinates {
42
43 const int length;
44 SkIPoint* const data;
45
CoordinatesCoordinates46 explicit Coordinates(int _length): length(_length)
47 , data(new SkIPoint[length]) { }
48
~CoordinatesCoordinates49 ~Coordinates(){
50 delete [] data;
51 }
52
operator []Coordinates53 SkIPoint* operator[](int i) const {
54 // Use with care, no bounds checking.
55 return data + i;
56 }
57 };
58
59 static const Pair gPairs[] = {
60 { kUnknown_SkColorType, "0000000" },
61 { kAlpha_8_SkColorType, "0100000" },
62 { kRGB_565_SkColorType, "0101011" },
63 { kARGB_4444_SkColorType, "0101111" },
64 { kN32_SkColorType, "0101111" },
65 { kRGBA_F16_SkColorType, "0101011" },
66 };
67
setup_src_bitmaps(SkBitmap * srcOpaque,SkBitmap * srcPremul,SkColorType ct)68 static void setup_src_bitmaps(SkBitmap* srcOpaque, SkBitmap* srcPremul,
69 SkColorType ct) {
70 const int W = 20;
71 const int H = 33;
72 sk_sp<SkColorSpace> colorSpace = nullptr;
73 if (kRGBA_F16_SkColorType == ct) {
74 colorSpace = SkColorSpace::MakeSRGB();
75 }
76
77 srcOpaque->allocPixels(SkImageInfo::Make(W, H, ct, kOpaque_SkAlphaType, colorSpace));
78 srcPremul->allocPixels(SkImageInfo::Make(W, H, ct, kPremul_SkAlphaType, colorSpace));
79 init_src(*srcOpaque);
80 init_src(*srcPremul);
81 }
82
DEF_TEST(BitmapCopy_extractSubset,reporter)83 DEF_TEST(BitmapCopy_extractSubset, reporter) {
84 const int W = 20;
85 for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
86 SkBitmap srcOpaque, srcPremul;
87 setup_src_bitmaps(&srcOpaque, &srcPremul, gPairs[i].fColorType);
88
89 SkBitmap bitmap(srcOpaque);
90 SkBitmap subset;
91 SkIRect r;
92 // Extract a subset which has the same width as the original. This
93 // catches a bug where we cloned the genID incorrectly.
94 r.setLTRB(0, 1, W, 3);
95 // Relies on old behavior of extractSubset failing if colortype is unknown
96 if (kUnknown_SkColorType != bitmap.colorType() && bitmap.extractSubset(&subset, r)) {
97 REPORTER_ASSERT(reporter, subset.width() == W);
98 REPORTER_ASSERT(reporter, subset.height() == 2);
99 REPORTER_ASSERT(reporter, subset.alphaType() == bitmap.alphaType());
100
101 // Test copying an extracted subset.
102 for (size_t j = 0; j < SK_ARRAY_COUNT(gPairs); j++) {
103 SkBitmap copy;
104 bool success = ToolUtils::copy_to(©, gPairs[j].fColorType, subset);
105 if (!success) {
106 // Skip checking that success matches fValid, which is redundant
107 // with the code below.
108 REPORTER_ASSERT(reporter, gPairs[i].fColorType != gPairs[j].fColorType);
109 continue;
110 }
111
112 // When performing a copy of an extracted subset, the gen id should
113 // change.
114 REPORTER_ASSERT(reporter, copy.getGenerationID() != subset.getGenerationID());
115
116 REPORTER_ASSERT(reporter, copy.width() == W);
117 REPORTER_ASSERT(reporter, copy.height() == 2);
118 }
119 }
120
121 bitmap = srcPremul;
122 if (bitmap.extractSubset(&subset, r)) {
123 REPORTER_ASSERT(reporter, subset.alphaType() == bitmap.alphaType());
124 }
125 }
126 }
127
128 #include "include/core/SkColorPriv.h"
129 #include "src/core/SkUtils.h"
130
131 /**
132 * Construct 4x4 pixels where we can look at a color and determine where it should be in the grid.
133 * alpha = 0xFF, blue = 0x80, red = x, green = y
134 */
fill_4x4_pixels(SkPMColor colors[16])135 static void fill_4x4_pixels(SkPMColor colors[16]) {
136 for (int y = 0; y < 4; ++y) {
137 for (int x = 0; x < 4; ++x) {
138 colors[y*4+x] = SkPackARGB32(0xFF, x, y, 0x80);
139 }
140 }
141 }
142
check_4x4_pixel(SkPMColor color,unsigned x,unsigned y)143 static bool check_4x4_pixel(SkPMColor color, unsigned x, unsigned y) {
144 SkASSERT(x < 4 && y < 4);
145 return 0xFF == SkGetPackedA32(color) &&
146 x == SkGetPackedR32(color) &&
147 y == SkGetPackedG32(color) &&
148 0x80 == SkGetPackedB32(color);
149 }
150
151 /**
152 * Fill with all zeros, which will never match any value from fill_4x4_pixels
153 */
clear_4x4_pixels(SkPMColor colors[16])154 static void clear_4x4_pixels(SkPMColor colors[16]) {
155 sk_memset32(colors, 0, 16);
156 }
157
158 // Much of readPixels is exercised by copyTo testing, since readPixels is the backend for that
159 // method. Here we explicitly test subset copies.
160 //
DEF_TEST(BitmapReadPixels,reporter)161 DEF_TEST(BitmapReadPixels, reporter) {
162 const int W = 4;
163 const int H = 4;
164 const size_t rowBytes = W * sizeof(SkPMColor);
165 const SkImageInfo srcInfo = SkImageInfo::MakeN32Premul(W, H);
166 SkPMColor srcPixels[16];
167 fill_4x4_pixels(srcPixels);
168 SkBitmap srcBM;
169 srcBM.installPixels(srcInfo, srcPixels, rowBytes);
170
171 SkImageInfo dstInfo = SkImageInfo::MakeN32Premul(W, H);
172 SkPMColor dstPixels[16];
173
174 const struct {
175 bool fExpectedSuccess;
176 SkIPoint fRequestedSrcLoc;
177 SkISize fRequestedDstSize;
178 // If fExpectedSuccess, check these, otherwise ignore
179 SkIPoint fExpectedDstLoc;
180 SkIRect fExpectedSrcR;
181 } gRec[] = {
182 { true, { 0, 0 }, { 4, 4 }, { 0, 0 }, { 0, 0, 4, 4 } },
183 { true, { 1, 1 }, { 2, 2 }, { 0, 0 }, { 1, 1, 3, 3 } },
184 { true, { 2, 2 }, { 4, 4 }, { 0, 0 }, { 2, 2, 4, 4 } },
185 { true, {-1,-1 }, { 2, 2 }, { 1, 1 }, { 0, 0, 1, 1 } },
186 { false, {-1,-1 }, { 1, 1 }, { 0, 0 }, { 0, 0, 0, 0 } },
187 };
188
189 for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
190 clear_4x4_pixels(dstPixels);
191
192 dstInfo = dstInfo.makeDimensions(gRec[i].fRequestedDstSize);
193 bool success = srcBM.readPixels(dstInfo, dstPixels, rowBytes,
194 gRec[i].fRequestedSrcLoc.x(), gRec[i].fRequestedSrcLoc.y());
195
196 REPORTER_ASSERT(reporter, gRec[i].fExpectedSuccess == success);
197 if (success) {
198 const SkIRect srcR = gRec[i].fExpectedSrcR;
199 const int dstX = gRec[i].fExpectedDstLoc.x();
200 const int dstY = gRec[i].fExpectedDstLoc.y();
201 // Walk the dst pixels, and check if we got what we expected
202 for (int y = 0; y < H; ++y) {
203 for (int x = 0; x < W; ++x) {
204 SkPMColor dstC = dstPixels[y*4+x];
205 // get into src coordinates
206 int sx = x - dstX + srcR.x();
207 int sy = y - dstY + srcR.y();
208 if (srcR.contains(sx, sy)) {
209 REPORTER_ASSERT(reporter, check_4x4_pixel(dstC, sx, sy));
210 } else {
211 REPORTER_ASSERT(reporter, 0 == dstC);
212 }
213 }
214 }
215 }
216 }
217 }
218