aboutsummaryrefslogtreecommitdiffhomepage
path: root/tests/BitmapCopyTest.cpp
blob: aadf192285b7f8d87793885644eede21b94ded8f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkBitmap.h"
#include "SkRect.h"
#include "SkTemplates.h"
#include "Test.h"

static void init_src(const SkBitmap& bitmap) {
    if (bitmap.getPixels()) {
        if (bitmap.getColorTable()) {
            sk_bzero(bitmap.getPixels(), bitmap.getSize());
        } else {
            bitmap.eraseColor(SK_ColorWHITE);
        }
    }
}

static sk_sp<SkColorTable> init_ctable() {
    static const SkColor colors[] = {
        SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE
    };
    return SkColorTable::Make(colors, SK_ARRAY_COUNT(colors));
}

struct Pair {
    SkColorType fColorType;
    const char* fValid;
};

// Utility functions for copyPixelsTo()/copyPixelsFrom() tests.
// getPixel()
// setPixel()
// getSkConfigName()
// struct Coordinates
// reportCopyVerification()
// writeCoordPixels()

// Helper struct to contain pixel locations, while avoiding need for STL.
struct Coordinates {

    const int length;
    SkIPoint* const data;

    explicit Coordinates(int _length): length(_length)
                                     , data(new SkIPoint[length]) { }

    ~Coordinates(){
        delete [] data;
    }

    SkIPoint* operator[](int i) const {
        // Use with care, no bounds checking.
        return data + i;
    }
};

static const Pair gPairs[] = {
    { kUnknown_SkColorType,     "0000000"  },
    { kAlpha_8_SkColorType,     "0100000"  },
    { kIndex_8_SkColorType,     "0101111"  },
    { kRGB_565_SkColorType,     "0101011"  },
    { kARGB_4444_SkColorType,   "0101111"  },
    { kN32_SkColorType,         "0101111"  },
    { kRGBA_F16_SkColorType,    "0101011"  },
};

static const int W = 20;
static const int H = 33;

static void setup_src_bitmaps(SkBitmap* srcOpaque, SkBitmap* srcPremul,
                              SkColorType ct) {
    sk_sp<SkColorTable> ctable;
    if (kIndex_8_SkColorType == ct) {
        ctable = init_ctable();
    }

    sk_sp<SkColorSpace> colorSpace = nullptr;
    if (kRGBA_F16_SkColorType == ct) {
        colorSpace = SkColorSpace::MakeSRGBLinear();
    }

    srcOpaque->allocPixels(SkImageInfo::Make(W, H, ct, kOpaque_SkAlphaType, colorSpace), ctable);
    srcPremul->allocPixels(SkImageInfo::Make(W, H, ct, kPremul_SkAlphaType, colorSpace), ctable);
    init_src(*srcOpaque);
    init_src(*srcPremul);
}

DEF_TEST(BitmapCopy_extractSubset, reporter) {
    for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
        SkBitmap srcOpaque, srcPremul;
        setup_src_bitmaps(&srcOpaque, &srcPremul, gPairs[i].fColorType);

        SkBitmap bitmap(srcOpaque);
        SkBitmap subset;
        SkIRect r;
        // Extract a subset which has the same width as the original. This
        // catches a bug where we cloned the genID incorrectly.
        r.set(0, 1, W, 3);
        bitmap.setIsVolatile(true);
        // Relies on old behavior of extractSubset failing if colortype is unknown
        if (kUnknown_SkColorType != bitmap.colorType() && bitmap.extractSubset(&subset, r)) {
            REPORTER_ASSERT(reporter, subset.width() == W);
            REPORTER_ASSERT(reporter, subset.height() == 2);
            REPORTER_ASSERT(reporter, subset.alphaType() == bitmap.alphaType());
            REPORTER_ASSERT(reporter, subset.isVolatile() == true);

            // Test copying an extracted subset.
            for (size_t j = 0; j < SK_ARRAY_COUNT(gPairs); j++) {
                SkBitmap copy;
                bool success = subset.copyTo(&copy, gPairs[j].fColorType);
                if (!success) {
                    // Skip checking that success matches fValid, which is redundant
                    // with the code below.
                    REPORTER_ASSERT(reporter, kIndex_8_SkColorType == gPairs[i].fColorType ||
                                              gPairs[i].fColorType != gPairs[j].fColorType);
                    continue;
                }

                // When performing a copy of an extracted subset, the gen id should
                // change.
                REPORTER_ASSERT(reporter, copy.getGenerationID() != subset.getGenerationID());

                REPORTER_ASSERT(reporter, copy.width() == W);
                REPORTER_ASSERT(reporter, copy.height() == 2);

                if (gPairs[i].fColorType == gPairs[j].fColorType) {
                    // they should both have, or both not-have, a colortable
                    bool hasCT = subset.getColorTable() != nullptr;
                    REPORTER_ASSERT(reporter, (copy.getColorTable() != nullptr) == hasCT);
                }
            }
        }

        bitmap = srcPremul;
        bitmap.setIsVolatile(false);
        if (bitmap.extractSubset(&subset, r)) {
            REPORTER_ASSERT(reporter, subset.alphaType() == bitmap.alphaType());
            REPORTER_ASSERT(reporter, subset.isVolatile() == false);
        }
    }
}

#include "SkColorPriv.h"
#include "SkUtils.h"

/**
 *  Construct 4x4 pixels where we can look at a color and determine where it should be in the grid.
 *  alpha = 0xFF, blue = 0x80, red = x, green = y
 */
static void fill_4x4_pixels(SkPMColor colors[16]) {
    for (int y = 0; y < 4; ++y) {
        for (int x = 0; x < 4; ++x) {
            colors[y*4+x] = SkPackARGB32(0xFF, x, y, 0x80);
        }
    }
}

static bool check_4x4_pixel(SkPMColor color, unsigned x, unsigned y) {
    SkASSERT(x < 4 && y < 4);
    return  0xFF == SkGetPackedA32(color) &&
            x    == SkGetPackedR32(color) &&
            y    == SkGetPackedG32(color) &&
            0x80 == SkGetPackedB32(color);
}

/**
 *  Fill with all zeros, which will never match any value from fill_4x4_pixels
 */
static void clear_4x4_pixels(SkPMColor colors[16]) {
    sk_memset32(colors, 0, 16);
}

// Much of readPixels is exercised by copyTo testing, since readPixels is the backend for that
// method. Here we explicitly test subset copies.
//
DEF_TEST(BitmapReadPixels, reporter) {
    const int W = 4;
    const int H = 4;
    const size_t rowBytes = W * sizeof(SkPMColor);
    const SkImageInfo srcInfo = SkImageInfo::MakeN32Premul(W, H);
    SkPMColor srcPixels[16];
    fill_4x4_pixels(srcPixels);
    SkBitmap srcBM;
    srcBM.installPixels(srcInfo, srcPixels, rowBytes);

    SkImageInfo dstInfo = SkImageInfo::MakeN32Premul(W, H);
    SkPMColor dstPixels[16];

    const struct {
        bool     fExpectedSuccess;
        SkIPoint fRequestedSrcLoc;
        SkISize  fRequestedDstSize;
        // If fExpectedSuccess, check these, otherwise ignore
        SkIPoint fExpectedDstLoc;
        SkIRect  fExpectedSrcR;
    } gRec[] = {
        { true,  { 0, 0 }, { 4, 4 }, { 0, 0 }, { 0, 0, 4, 4 } },
        { true,  { 1, 1 }, { 2, 2 }, { 0, 0 }, { 1, 1, 3, 3 } },
        { true,  { 2, 2 }, { 4, 4 }, { 0, 0 }, { 2, 2, 4, 4 } },
        { true,  {-1,-1 }, { 2, 2 }, { 1, 1 }, { 0, 0, 1, 1 } },
        { false, {-1,-1 }, { 1, 1 }, { 0, 0 }, { 0, 0, 0, 0 } },
    };

    for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
        clear_4x4_pixels(dstPixels);

        dstInfo = dstInfo.makeWH(gRec[i].fRequestedDstSize.width(),
                                 gRec[i].fRequestedDstSize.height());
        bool success = srcBM.readPixels(dstInfo, dstPixels, rowBytes,
                                        gRec[i].fRequestedSrcLoc.x(), gRec[i].fRequestedSrcLoc.y());

        REPORTER_ASSERT(reporter, gRec[i].fExpectedSuccess == success);
        if (success) {
            const SkIRect srcR = gRec[i].fExpectedSrcR;
            const int dstX = gRec[i].fExpectedDstLoc.x();
            const int dstY = gRec[i].fExpectedDstLoc.y();
            // Walk the dst pixels, and check if we got what we expected
            for (int y = 0; y < H; ++y) {
                for (int x = 0; x < W; ++x) {
                    SkPMColor dstC = dstPixels[y*4+x];
                    // get into src coordinates
                    int sx = x - dstX + srcR.x();
                    int sy = y - dstY + srcR.y();
                    if (srcR.contains(sx, sy)) {
                        REPORTER_ASSERT(reporter, check_4x4_pixel(dstC, sx, sy));
                    } else {
                        REPORTER_ASSERT(reporter, 0 == dstC);
                    }
                }
            }
        }
    }
}

DEF_TEST(BitmapCopy_ColorSpaceMatch, r) {
    // We should support matching color spaces, even if they are parametric.
    SkColorSpaceTransferFn fn;
    fn.fA = 1.f; fn.fB = 0.f; fn.fC = 0.f; fn.fD = 0.f; fn.fE = 0.f; fn.fF = 0.f; fn.fG = 1.8f;
    sk_sp<SkColorSpace> cs = SkColorSpace::MakeRGB(fn, SkColorSpace::kRec2020_Gamut);

    SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1, cs);
    SkBitmap bitmap;
    bitmap.allocPixels(info);
    bitmap.eraseColor(0);

    SkBitmap copy;
    bool success = bitmap.copyTo(&copy, kN32_SkColorType);
    REPORTER_ASSERT(r, success);
    REPORTER_ASSERT(r, cs.get() == copy.colorSpace());
}