| /* |
| * 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; |
| } |
| |
| sk_sp<GrFragmentProcessor> clone() const override; |
| |
| GrColor4f color() const { return fColor; } |
| |
| InputMode inputMode() const { return fMode; } |
| |
| private: |
| static OptimizationFlags OptFlags(GrColor4f color, InputMode mode) { |
| OptimizationFlags flags = kConstantOutputForConstantInput_OptimizationFlag; |
| if (mode != kIgnore_InputMode) { |
| flags |= kCompatibleWithCoverageAsAlpha_OptimizationFlag; |
| } |
| if (color.isOpaque()) { |
| flags |= kPreservesOpaqueInput_OptimizationFlag; |
| } |
| return flags; |
| } |
| |
| GrConstColorProcessor(GrColor4f color, InputMode mode) |
| : INHERITED(OptFlags(color, 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; |
| |
| GrColor4f constantOutputForConstantInput(GrColor4f input) const override; |
| |
| GR_DECLARE_FRAGMENT_PROCESSOR_TEST |
| |
| GrColor4f fColor; |
| InputMode fMode; |
| |
| typedef GrFragmentProcessor INHERITED; |
| }; |
| |
| #endif |