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) {
    auto drawSquare = [=](int dx, int dy, SkBlendMode mode, const char* label) -> void {
        const SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
        const SkPoint horz[] = { { 0, 0 }, { 128, 0 } };
        SkPaint paint;
        paint.setShader(SkGradientShader::MakeLinear(horz, colors, nullptr, std::size(colors),
                SkTileMode::kClamp));
        paint.setBlendMode(mode);
        canvas->translate(dx, dy);
        canvas->drawRect({0, 0, 128, 128}, paint);
        paint.setBlendMode(SkBlendMode::kXor);
        SkFont font = SkFont(fontMgr->matchFamilyStyle(nullptr, {}));
        canvas->drawString(label, 40, 100, font, paint);
    };
    drawSquare(0, 0, SkBlendMode::kSrc, "destination");
    drawSquare(128, 0, SkBlendMode::kSrc, "");
    drawSquare(0, 128, SkBlendMode::kSrc, "");
    canvas->translate(-128, -128);
    canvas->rotate(90, 0, 128);
    drawSquare(0, 0, SkBlendMode::kSrc, "source");
    drawSquare(0, -128, SkBlendMode::kModulate, "modulate");
    drawSquare(-128, 0, SkBlendMode::kMultiply, "multiply");
}