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.
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sk_sp<SkImage> alpha_image() {
    auto s = SkSurfaces::Raster(SkImageInfo::MakeA8(128, 128));
    s->getCanvas()->clear(SkColorSetARGB(0xF0, 0x00, 0x00, 0x00));
    return s->makeImageSnapshot();
}
sk_sp<SkShader> linear_gradient() {
    SkPoint gpts[2] = {{0, 0}, {256, 256}};
    SkColor gc[6] = {SK_ColorCYAN, SK_ColorBLUE,   SK_ColorMAGENTA,
                     SK_ColorRED,  SK_ColorYELLOW, SK_ColorGREEN};
    return SkGradientShader::MakeLinear(gpts, gc, nullptr, 6, SkTileMode::kClamp);
}
​
void draw(SkCanvas* canvas) {
    canvas->clear(SK_ColorLTGRAY);
    SkPaint p;
    p.setShader(linear_gradient());
    auto i = alpha_image();
    canvas->drawImage(i.get(), 128, 0, SkSamplingOptions(), &p);
    canvas->drawRect({0, 128, 128, 256}, p);
}