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Skia Fiddle
Skia Version:
057a32
void draw(SkCanvas* canvas) { canvas->scale(0.5, 0.5); uint8_t ct[256]; for (int i = 0; i < 256; ++i) { int x = (i - 96) * 255 / 64; ct[i] = x < 0 ? 0 : x > 255 ? 255 : x; } SkPaint paint; paint.setColorFilter(SkTableColorFilter::MakeARGB(nullptr, ct, ct, ct)); canvas->drawImage(image, 0, 0, &paint); }
Skia API Documentation