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      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 #include "sk_tool_utils.h"
     13 
     14 static void test_peekpixels(skiatest::Reporter* reporter) {
     15     const SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
     16 
     17     SkPixmap pmap;
     18     SkBitmap bm;
     19 
     20     // empty should return false
     21     REPORTER_ASSERT(reporter, !bm.peekPixels(nullptr));
     22     REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));
     23 
     24     // no pixels should return false
     25     bm.setInfo(SkImageInfo::MakeN32Premul(10, 10));
     26     REPORTER_ASSERT(reporter, !bm.peekPixels(nullptr));
     27     REPORTER_ASSERT(reporter, !bm.peekPixels(&pmap));
     28 
     29     // real pixels should return true
     30     bm.allocPixels(info);
     31     REPORTER_ASSERT(reporter, bm.peekPixels(nullptr));
     32     REPORTER_ASSERT(reporter, bm.peekPixels(&pmap));
     33     REPORTER_ASSERT(reporter, pmap.info() == bm.info());
     34     REPORTER_ASSERT(reporter, pmap.addr() == bm.getPixels());
     35     REPORTER_ASSERT(reporter, pmap.rowBytes() == bm.rowBytes());
     36 }
     37 
     38 // https://code.google.com/p/chromium/issues/detail?id=446164
     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     sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeAllocate(info, info.minRowBytes());
     48     REPORTER_ASSERT(reporter, !pr);
     49 }
     50 
     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 
     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  */
    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  */
    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 (!sk_tool_utils::copy_to(&copy, ct, source)) {
    141             ERRORF(r, "SkBitmap::copy failed %d", (int)ct);
    142             continue;
    143         }
    144         REPORTER_ASSERT(r, source.getColor(0, 0) == copy.getColor(0, 0));
    145     }
    146 }
    147 
    148 static void test_erasecolor_premul(skiatest::Reporter* reporter, SkColorType ct, SkColor input,
    149                                    SkColor expected) {
    150   SkBitmap bm;
    151   bm.allocPixels(SkImageInfo::Make(1, 1, ct, kPremul_SkAlphaType));
    152   bm.eraseColor(input);
    153   INFOF(reporter, "expected: %x actual: %x\n", expected, bm.getColor(0, 0));
    154   REPORTER_ASSERT(reporter, bm.getColor(0, 0) == expected);
    155 }
    156 
    157 /**
    158  *  This test checks that eraseColor premultiplies the color correctly.
    159  */
    160 DEF_TEST(Bitmap_eraseColor_Premul, r) {
    161     SkColor color = 0x80FF0080;
    162     test_erasecolor_premul(r, kAlpha_8_SkColorType, color, 0x80000000);
    163     test_erasecolor_premul(r, kRGB_565_SkColorType, color, 0xFF840042);
    164     test_erasecolor_premul(r, kARGB_4444_SkColorType, color, 0x88FF0080);
    165     test_erasecolor_premul(r, kRGBA_8888_SkColorType, color, color);
    166     test_erasecolor_premul(r, kBGRA_8888_SkColorType, color, color);
    167 }
    168 
    169 // Test that SkBitmap::ComputeOpaque() is correct for various colortypes.
    170 DEF_TEST(Bitmap_compute_is_opaque, r) {
    171     struct {
    172         SkColorType fCT;
    173         SkAlphaType fAT;
    174     } types[] = {
    175         { kGray_8_SkColorType,    kOpaque_SkAlphaType },
    176         { kAlpha_8_SkColorType,   kPremul_SkAlphaType },
    177         { kARGB_4444_SkColorType, kPremul_SkAlphaType },
    178         { kRGB_565_SkColorType,   kOpaque_SkAlphaType },
    179         { kBGRA_8888_SkColorType, kPremul_SkAlphaType },
    180         { kRGBA_8888_SkColorType, kPremul_SkAlphaType },
    181         { kRGBA_F16_SkColorType,  kPremul_SkAlphaType },
    182     };
    183     for (auto type : types) {
    184         SkBitmap bm;
    185         REPORTER_ASSERT(r, !SkBitmap::ComputeIsOpaque(bm));
    186 
    187         bm.allocPixels(SkImageInfo::Make(13, 17, type.fCT, type.fAT));
    188         bm.eraseColor(SkColorSetARGB(255, 10, 20, 30));
    189         REPORTER_ASSERT(r, SkBitmap::ComputeIsOpaque(bm));
    190 
    191         bm.eraseColor(SkColorSetARGB(128, 255, 255, 255));
    192         bool isOpaque = SkBitmap::ComputeIsOpaque(bm);
    193         bool shouldBeOpaque = (type.fAT == kOpaque_SkAlphaType);
    194         REPORTER_ASSERT(r, isOpaque == shouldBeOpaque);
    195     }
    196 }
    197 
    198 // Test that erase+getColor round trips with RGBA_F16 pixels.
    199 DEF_TEST(Bitmap_erase_f16_erase_getColor, r) {
    200     SkRandom random;
    201     SkPixmap pm;
    202     SkBitmap bm;
    203     bm.allocPixels(SkImageInfo::Make(1, 1, kRGBA_F16_SkColorType, kPremul_SkAlphaType));
    204     REPORTER_ASSERT(r, bm.peekPixels(&pm));
    205     for (unsigned i = 0; i < 0x100; ++i) {
    206         // Test all possible values of blue component.
    207         SkColor color1 = (SkColor)((random.nextU() & 0xFFFFFF00) | i);
    208         // Test all possible values of alpha component.
    209         SkColor color2 = (SkColor)((random.nextU() & 0x00FFFFFF) | (i << 24));
    210         for (SkColor color : {color1, color2}) {
    211             pm.erase(color);
    212             if (SkColorGetA(color) != 0) {
    213                 REPORTER_ASSERT(r, color == pm.getColor(0, 0));
    214             } else {
    215                 REPORTER_ASSERT(r, 0 == SkColorGetA(pm.getColor(0, 0)));
    216             }
    217         }
    218     }
    219 }
    220 
    221 // Make sure that the bitmap remains valid when pixelref is removed.
    222 DEF_TEST(Bitmap_clear_pixelref_keep_info, r) {
    223     SkBitmap bm;
    224     bm.allocPixels(SkImageInfo::MakeN32Premul(100,100));
    225     bm.setPixelRef(nullptr, 0, 0);
    226     SkDEBUGCODE(bm.validate();)
    227 }
    228 
    229