Skia Fiddle

Options

Width Height

check_box_outline_blank check_box Text Only [Use SkDebugf()]

check_box_outline_blank check_box sRGB

check_box_outline_blank check_box F16

check_box_outline_blank check_box Animation

check_box_outline_blank check_box Offscreen Render Target

Width Height Sample Count

check_box_outline_blank check_box Texturable

check_box_outline_blank check_box MipMap

This global is now defined:

GrBackendRenderTarget backEndRenderTarget;

GrBackendTexture backEndTextureRenderTarget;

Optional source image

check_box_outline_blank check_box MipMap

These globals are now defined:

SkBitmap source;
sk_sp<SkImage> image;
GrBackendTexture backEndTexture; // GPU Only.

Note:

Adding comments with SK_FOLD_START and SK_FOLD_END creates foldable code blocks.
These blocks will be folded by default and are useful for highlighting specific lines of code.
You can also use the keyboard shortcuts Ctrl+S and Ctrl+E in the code editor to set them.

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void draw(SkCanvas* canvas) {
    canvas->clear(0xffa020a0);
    SkImageInfo premulInfo = SkImageInfo::MakeS32(10, 10, kPremul_SkAlphaType);
    SkBitmap premulBitmap;
    premulBitmap.allocPixels(premulInfo);
    for (int y = 0; y < 10; y++) {
        for (int x = 0; x < 10; x++) {
            *(premulBitmap.getAddr32(x, y)) = 0x80808080;
        }
    }
    sk_sp<SkImage> premulImage = premulBitmap.asImage();
​
    SkImageInfo unpremulInfo = premulInfo.makeAlphaType(kUnpremul_SkAlphaType);
    SkBitmap unpremulBitmap;
    unpremulBitmap.allocPixels(unpremulInfo);
    for (int y = 0; y < 10; y++) {
        for (int x = 0; x < 10; x++) {
            *(unpremulBitmap.getAddr32(x, y)) = 0x80FFFFFF;
        }
    }
    sk_sp<SkImage> unpremulImage = unpremulBitmap.asImage();
​
    SkPaint paint;
    const SkTileMode tile = SkTileMode::kRepeat;
    paint.setShader(premulImage->makeShader(tile, tile, SkSamplingOptions()));
    canvas->drawCircle(10.0f, 10.0f, 10.0f, paint);
​
    paint.setShader(unpremulImage->makeShader(tile, tile, SkSamplingOptions()));
    canvas->drawCircle(10.0f, 35.0f, 10.0f, paint);
}