aboutsummaryrefslogtreecommitdiffhomepage
path: root/tests/BitmapTest.cpp
blob: e0a7f78d8b02c82194c5a034d3b5023147da0099 (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
/*
 * Copyright 2013 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 "SkMallocPixelRef.h"
#include "SkRandom.h"
#include "Test.h"
#include "sk_tool_utils.h"

static void test_peekpixels(skiatest::Reporter* reporter) {
    const SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);

    SkPixmap pmap;
    SkBitmap bm;

    // empty should return false
    REPORTER_ASSERT(reporter, !bm.peekPixels(nullptr));
    REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));

    // no pixels should return false
    bm.setInfo(SkImageInfo::MakeN32Premul(10, 10));
    REPORTER_ASSERT(reporter, !bm.peekPixels(nullptr));
    REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));

    // real pixels should return true
    bm.allocPixels(info);
    REPORTER_ASSERT(reporter, bm.peekPixels(nullptr));
    REPORTER_ASSERT(reporter, bm.peekPixels(&pmap));
    REPORTER_ASSERT(reporter, pmap.info() == bm.info());
    REPORTER_ASSERT(reporter, pmap.addr() == bm.getPixels());
    REPORTER_ASSERT(reporter, pmap.rowBytes() == bm.rowBytes());
    REPORTER_ASSERT(reporter, pmap.ctable() == bm.getColorTable());
}

// https://code.google.com/p/chromium/issues/detail?id=446164
static void test_bigalloc(skiatest::Reporter* reporter) {
    const int width = 0x40000001;
    const int height = 0x00000096;
    const SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);

    SkBitmap bm;
    REPORTER_ASSERT(reporter, !bm.tryAllocPixels(info));

    sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeAllocate(info, info.minRowBytes(), nullptr);
    REPORTER_ASSERT(reporter, !pr);
}

static void test_allocpixels(skiatest::Reporter* reporter) {
    const int width = 10;
    const int height = 10;
    const SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
    const size_t explicitRowBytes = info.minRowBytes() + 24;

    SkBitmap bm;
    bm.setInfo(info);
    REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
    bm.allocPixels();
    REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
    bm.reset();
    bm.allocPixels(info);
    REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());

    bm.setInfo(info, explicitRowBytes);
    REPORTER_ASSERT(reporter, explicitRowBytes == bm.rowBytes());
    bm.allocPixels();
    REPORTER_ASSERT(reporter, explicitRowBytes == bm.rowBytes());
    bm.reset();
    bm.allocPixels(info, explicitRowBytes);
    REPORTER_ASSERT(reporter, explicitRowBytes == bm.rowBytes());

    bm.reset();
    bm.setInfo(info, 0);
    REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());
    bm.reset();
    bm.allocPixels(info, 0);
    REPORTER_ASSERT(reporter, info.minRowBytes() == bm.rowBytes());

    bm.reset();
    bool success = bm.setInfo(info, info.minRowBytes() - 1);   // invalid for 32bit
    REPORTER_ASSERT(reporter, !success);
    REPORTER_ASSERT(reporter, bm.isNull());
}

static void test_bigwidth(skiatest::Reporter* reporter) {
    SkBitmap bm;
    int width = 1 << 29;    // *4 will be the high-bit of 32bit int

    SkImageInfo info = SkImageInfo::MakeA8(width, 1);
    REPORTER_ASSERT(reporter, bm.setInfo(info));
    REPORTER_ASSERT(reporter, bm.setInfo(info.makeColorType(kRGB_565_SkColorType)));

    // for a 4-byte config, this width will compute a rowbytes of 0x80000000,
    // which does not fit in a int32_t. setConfig should detect this, and fail.

    // TODO: perhaps skia can relax this, and only require that rowBytes fit
    //       in a uint32_t (or larger), but for now this is the constraint.

    REPORTER_ASSERT(reporter, !bm.setInfo(info.makeColorType(kN32_SkColorType)));
}

/**
 *  This test contains basic sanity checks concerning bitmaps.
 */
DEF_TEST(Bitmap, reporter) {
    // Zero-sized bitmaps are allowed
    for (int width = 0; width < 2; ++width) {
        for (int height = 0; height < 2; ++height) {
            SkBitmap bm;
            bool setConf = bm.setInfo(SkImageInfo::MakeN32Premul(width, height));
            REPORTER_ASSERT(reporter, setConf);
            if (setConf) {
                bm.allocPixels();
            }
            REPORTER_ASSERT(reporter, SkToBool(width & height) != bm.empty());
        }
    }

    test_bigwidth(reporter);
    test_allocpixels(reporter);
    test_bigalloc(reporter);
    test_peekpixels(reporter);
}

/**
 *  This test checks that getColor works for both swizzles.
 */
DEF_TEST(Bitmap_getColor_Swizzle, r) {
    SkBitmap source;
    source.allocN32Pixels(1,1);
    source.eraseColor(SK_ColorRED);
    SkColorType colorTypes[] = {
        kRGBA_8888_SkColorType,
        kBGRA_8888_SkColorType,
    };
    for (SkColorType ct : colorTypes) {
        SkBitmap copy;
        if (!sk_tool_utils::copy_to(&copy, ct, source)) {
            ERRORF(r, "SkBitmap::copy failed %d", (int)ct);
            continue;
        }
        REPORTER_ASSERT(r, source.getColor(0, 0) == copy.getColor(0, 0));
    }
}

static void test_erasecolor_premul(skiatest::Reporter* reporter, SkColorType ct, SkColor input,
                                   SkColor expected) {
  SkBitmap bm;
  bm.allocPixels(SkImageInfo::Make(1, 1, ct, kPremul_SkAlphaType));
  bm.eraseColor(input);
  INFOF(reporter, "expected: %x actual: %x\n", expected, bm.getColor(0, 0));
  REPORTER_ASSERT(reporter, bm.getColor(0, 0) == expected);
}

/**
 *  This test checks that eraseColor premultiplies the color correctly.
 */
DEF_TEST(Bitmap_eraseColor_Premul, r) {
    SkColor color = 0x80FF0080;
    test_erasecolor_premul(r, kAlpha_8_SkColorType, color, 0x80000000);
    test_erasecolor_premul(r, kRGB_565_SkColorType, color, 0xFF840042);
    test_erasecolor_premul(r, kARGB_4444_SkColorType, color, 0x88FF0080);
    test_erasecolor_premul(r, kRGBA_8888_SkColorType, color, color);
    test_erasecolor_premul(r, kBGRA_8888_SkColorType, color, color);
}

// Test that SkBitmap::ComputeOpaque() is correct for various colortypes.
DEF_TEST(Bitmap_compute_is_opaque, r) {
    struct {
        SkColorType fCT;
        SkAlphaType fAT;
    } types[] = {
        { kGray_8_SkColorType,    kOpaque_SkAlphaType },
        { kAlpha_8_SkColorType,   kPremul_SkAlphaType },
        { kARGB_4444_SkColorType, kPremul_SkAlphaType },
        { kRGB_565_SkColorType,   kOpaque_SkAlphaType },
        { kBGRA_8888_SkColorType, kPremul_SkAlphaType },
        { kRGBA_8888_SkColorType, kPremul_SkAlphaType },
        { kRGBA_F16_SkColorType,  kPremul_SkAlphaType },
    };
    for (auto type : types) {
        SkBitmap bm;
        REPORTER_ASSERT(r, !SkBitmap::ComputeIsOpaque(bm));

        bm.allocPixels(SkImageInfo::Make(13, 17, type.fCT, type.fAT));
        bm.eraseColor(SkColorSetARGB(255, 10, 20, 30));
        REPORTER_ASSERT(r, SkBitmap::ComputeIsOpaque(bm));

        bm.eraseColor(SkColorSetARGB(128, 255, 255, 255));
        bool isOpaque = SkBitmap::ComputeIsOpaque(bm);
        bool shouldBeOpaque = (type.fAT == kOpaque_SkAlphaType);
        REPORTER_ASSERT(r, isOpaque == shouldBeOpaque);
    }
}

// Test that erase+getColor round trips with RGBA_F16 pixels.
DEF_TEST(Bitmap_erase_f16_erase_getColor, r) {
    SkRandom random;
    SkPixmap pm;
    SkBitmap bm;
    bm.allocPixels(SkImageInfo::Make(1, 1, kRGBA_F16_SkColorType, kPremul_SkAlphaType));
    REPORTER_ASSERT(r, bm.peekPixels(&pm));
    for (unsigned i = 0; i < 0x100; ++i) {
        // Test all possible values of blue component.
        SkColor color1 = (SkColor)((random.nextU() & 0xFFFFFF00) | i);
        // Test all possible values of alpha component.
        SkColor color2 = (SkColor)((random.nextU() & 0x00FFFFFF) | (i << 24));
        for (SkColor color : {color1, color2}) {
            pm.erase(color);
            if (SkColorGetA(color) != 0) {
                REPORTER_ASSERT(r, color == pm.getColor(0, 0));
            } else {
                REPORTER_ASSERT(r, 0 == SkColorGetA(pm.getColor(0, 0)));
            }
        }
    }
}