GrBlendFragmentProcessor Namespace Reference

Functions
std::unique_ptr< GrFragmentProcessor >	Make (std::unique_ptr< GrFragmentProcessor > src, std::unique_ptr< GrFragmentProcessor > dst, SkBlendMode mode, bool shareBlendLogic=true)
template<SkBlendMode mode>
std::unique_ptr< GrFragmentProcessor >	Make (std::unique_ptr< GrFragmentProcessor > src, std::unique_ptr< GrFragmentProcessor > dst)

Function Documentation

Make() [1/2]

template<SkBlendMode mode>

std::unique_ptr< GrFragmentProcessor > GrBlendFragmentProcessor::Make	(	std::unique_ptr< GrFragmentProcessor >	src,
		std::unique_ptr< GrFragmentProcessor >	dst
	)

Blends src and dst inputs according to the blend mode. If either input is null, fInputColor is used instead. Hard-wires a single blend mode into the code (slightly reducing complexity).

Definition at line 36 of file GrBlendFragmentProcessor.h.

                                                                                  {
    return Make(std::move(src), std::move(dst), mode, /*shareBlendLogic=*/false);
}

Make() [2/2]

std::unique_ptr< GrFragmentProcessor > GrBlendFragmentProcessor::Make	(	std::unique_ptr< GrFragmentProcessor >	src,
		std::unique_ptr< GrFragmentProcessor >	dst,
		SkBlendMode	mode,
		bool	shareBlendLogic = true
	)

Blends src and dst inputs according to the blend mode. If either input is null, fInputColor is used instead.

• When shareBlendLogic is false, the blend function logic is written directly into the code.
• When shareBlendLogic is true, most Porter-Duff blends share the same code, and a uniform is used to pick the blend type. This can reduce our overall shader count.

Definition at line 272 of file GrBlendFragmentProcessor.cpp.

                              {
    // These modes simplify dramatically in the shader, but only if we bypass the shared logic:
    if (mode == SkBlendMode::kClear || mode == SkBlendMode::kSrc || mode == SkBlendMode::kDst) {
        shareBlendLogic = false;
    }
 
    return BlendFragmentProcessor::Make(std::move(src), std::move(dst), mode, shareBlendLogic);
}