C++ (Cpp) SkBitmap::eraseArea Examples

Example #1

File: DragImageTest.cpp Project: aobzhirov/ChromiumGStreamerBackend

TEST(DragImageTest, InterpolationNone)
{
    SkBitmap expectedBitmap;
    expectedBitmap.allocN32Pixels(4, 4);
    {
        SkAutoLockPixels lock(expectedBitmap);
        expectedBitmap.eraseArea(SkIRect::MakeXYWH(0, 0, 2, 2), 0xFFFFFFFF);
        expectedBitmap.eraseArea(SkIRect::MakeXYWH(0, 2, 2, 2), 0xFF000000);
        expectedBitmap.eraseArea(SkIRect::MakeXYWH(2, 0, 2, 2), 0xFF000000);
        expectedBitmap.eraseArea(SkIRect::MakeXYWH(2, 2, 2, 2), 0xFFFFFFFF);
    }

    SkBitmap testBitmap;
    testBitmap.allocN32Pixels(2, 2);
    {
        SkAutoLockPixels lock(testBitmap);
        testBitmap.eraseArea(SkIRect::MakeXYWH(0, 0, 1, 1), 0xFFFFFFFF);
        testBitmap.eraseArea(SkIRect::MakeXYWH(0, 1, 1, 1), 0xFF000000);
        testBitmap.eraseArea(SkIRect::MakeXYWH(1, 0, 1, 1), 0xFF000000);
        testBitmap.eraseArea(SkIRect::MakeXYWH(1, 1, 1, 1), 0xFFFFFFFF);
    }

    RefPtr<TestImage> testImage = TestImage::create(adoptRef(SkImage::NewFromBitmap(testBitmap)));
    OwnPtr<DragImage> dragImage = DragImage::create(testImage.get(), DoNotRespectImageOrientation, 1, InterpolationNone);
    ASSERT_TRUE(dragImage);
    dragImage->scale(2, 2);
    const SkBitmap& dragBitmap = dragImage->bitmap();
    {
        SkAutoLockPixels lock1(dragBitmap);
        SkAutoLockPixels lock2(expectedBitmap);
        for (int x = 0; x < dragBitmap.width(); ++x)
            for (int y = 0; y < dragBitmap.height(); ++y)
                EXPECT_EQ(expectedBitmap.getColor(x, y), dragBitmap.getColor(x, y));
    }
}

Example #2

File: transparency.cpp Project: 03050903/skia

// http://crrev.com/834303005
static sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size) {
    SkBitmap bm;
    bm.allocN32Pixels(2 * size, 2 * size);
    bm.eraseColor(c1);
    bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2);
    bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2);
    return SkShader::MakeBitmapShader(bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
}

Example #3

File: sk_tool_utils.cpp Project: aseprite/skia

sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size) {
    SkBitmap bm;
    bm.allocPixels(SkImageInfo::MakeS32(2 * size, 2 * size, kPremul_SkAlphaType));
    bm.eraseColor(c1);
    bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2);
    bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2);
    return SkShader::MakeBitmapShader(
            bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
}

Example #4

File: skbug_257.cpp Project: Crawping/chromium_extract

static void rotated_checkerboard_shader(SkPaint* paint,
                                        SkColor c1,
                                        SkColor c2,
                                        int size) {
    SkBitmap bm;
    bm.allocN32Pixels(2 * size, 2 * size);
    bm.eraseColor(c1);
    bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2);
    bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2);
    SkMatrix matrix;
    matrix.setScale(0.75f, 0.75f);
    matrix.preRotate(30.0f);
    SkAutoTUnref<SkShader> shader(
            SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
                                         SkShader::kRepeat_TileMode, &matrix));
    paint->setShader(shader);
}