UniformAlphaMask
BReference<AlphaMask> mask(new(std::nothrow) UniformAlphaMask(layer->Opacity()), true);
UniformAlphaMask::UniformAlphaMask(uint8 opacity)
UniformAlphaMask::_RenderSource(const IntRect&)
UniformAlphaMask::_Offset()
UniformAlphaMask::_AddToCache()
class UniformAlphaMask : public AlphaMask {
UniformAlphaMask(uint8 opacity);