RuntimeBlendUtils.cpp File Reference

#include "include/core/SkBlendMode.h"
#include "include/core/SkRefCnt.h"
#include "include/effects/SkRuntimeEffect.h"
#include "tools/RuntimeBlendUtils.h"

Go to the source code of this file.

Functions
sk_sp< SkBlender >	GetRuntimeBlendForBlendMode (SkBlendMode mode)

Function Documentation

GetRuntimeBlendForBlendMode()

sk_sp< SkBlender > GetRuntimeBlendForBlendMode

(

SkBlendMode

mode

)

Returns a Runtime Effect-based blender which is equivalent to the passed-in SkBlendMode. This should generate the same output as the equivalent SkBlendMode operation, but always uses SkSL to perform the blend operation instead of relying on specialized/fixed-function code. This is useful for verifying that Runtime Blends are working as expected throughout the pipeline.

Definition at line 13 of file RuntimeBlendUtils.cpp.

                                                               {
    static auto result = SkRuntimeEffect::MakeForBlender(SkString(R"(
        uniform blender b;
        half4 main(half4 src, half4 dst) {
            return b.eval(src, dst);
        }
    )"));
 
    SkASSERTF(result.effect, "%s", result.errorText.c_str());
 
    SkRuntimeBlendBuilder builder(result.effect);
    builder.child("b") = SkBlender::Mode(mode);
    return builder.makeBlender();
}