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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrColorProcessor_DEFINED
#define GrColorProcessor_DEFINED
#include "GrFragmentProcessor.h"
/**
* This is a simple GrFragmentProcessor that outputs a constant color. It may do one of the
* following with its input color: ignore it, or multiply it by the constant color, multiply its
* alpha by the constant color and ignore the input color's r, g, and b.
*/
class GrConstColorProcessor : public GrFragmentProcessor {
public:
enum InputMode {
kIgnore_InputMode,
kModulateRGBA_InputMode,
kModulateA_InputMode,
kLastInputMode = kModulateA_InputMode
};
static const int kInputModeCnt = kLastInputMode + 1;
static sk_sp<GrFragmentProcessor> Make(GrColor4f color, InputMode mode) {
return sk_sp<GrFragmentProcessor>(new GrConstColorProcessor(color, mode));
}
const char* name() const override { return "Color"; }
SkString dumpInfo() const override {
SkString str;
str.appendf("Color: 0x%08x", fColor.toGrColor());
return str;
}
GrColor4f color() const { return fColor; }
InputMode inputMode() const { return fMode; }
private:
GrConstColorProcessor(GrColor4f color, InputMode mode) : fColor(color), fMode(mode) {
this->initClassID<GrConstColorProcessor>();
}
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
bool onIsEqual(const GrFragmentProcessor&) const override;
void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
GrColor4f fColor;
InputMode fMode;
typedef GrFragmentProcessor INHERITED;
};
#endif
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