8 bitmap.eraseARGB(0x7f, 0xff, 0x7f, 0x3f);
REG_FIDDLE(Bitmap_eraseARGB, 256, 80, false, 0)
@ kPremul_SkAlphaType
pixel components are premultiplied by alpha
static void draw(SkCanvas *canvas, SkRect &target, int x, int y)
void scale(SkScalar sx, SkScalar sy)
void drawImage(const SkImage *image, SkScalar left, SkScalar top)
static SkImageInfo MakeN32(int width, int height, SkAlphaType at)