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:

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void draw(SkCanvas* canvas) {
    std::vector<int32_t> pixels;
    const int width = 256;
    const int height = 64;
    pixels.resize(height * width * 4);
    SkImageInfo srcInfo = SkImageInfo::MakeN32Premul(width, height);
    SkPixmap srcPixmap(srcInfo, (const void*) &pixels.front(), width * 4);
    SkColor  gradColors[] = { 0xFFAA3300, 0x7F881122 };
    SkPoint  gradPoints[] = { { 0, 0 }, { 256, 0 } };
    SkPaint paint;
    paint.setShader(SkGradientShader::MakeLinear(gradPoints, gradColors, nullptr,
                    std::size(gradColors), SkTileMode::kClamp));
    SkBitmap bitmap;
    bitmap.installPixels(srcPixmap);
    SkCanvas srcCanvas(bitmap);
    srcCanvas.drawRect(SkRect::MakeWH(width, height), paint);
    canvas->drawImage(bitmap.asImage(), 0, 0);
    std::vector<int32_t> dstPixels;
    dstPixels.resize(height * width * 2);
    SkImageInfo dstInfo = srcInfo.makeColorType(kARGB_4444_SkColorType);
    srcPixmap.readPixels(dstInfo, &dstPixels.front(), width * 2);
    SkPixmap dstPixmap(dstInfo, &dstPixels.front(), width * 2);
    bitmap.installPixels(dstPixmap);
    canvas->drawImage(bitmap.asImage(), 0, 128);
}