| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkComposeShader_DEFINED |
| #define SkComposeShader_DEFINED |
| |
| #include "SkShaderBase.h" |
| #include "SkBlendMode.h" |
| |
| class SkComposeShader final : public SkShaderBase { |
| public: |
| SkComposeShader(sk_sp<SkShader> dst, sk_sp<SkShader> src, SkBlendMode mode, float lerpT) |
| : fDst(std::move(dst)) |
| , fSrc(std::move(src)) |
| , fLerpT(lerpT) |
| , fMode(mode) |
| { |
| SkASSERT(lerpT >= 0 && lerpT <= 1); |
| } |
| |
| #if SK_SUPPORT_GPU |
| std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override; |
| #endif |
| |
| #ifdef SK_DEBUGx |
| SkShader* getShaderA() { return fShaderA.get(); } |
| SkShader* getShaderB() { return fShaderB.get(); } |
| #endif |
| |
| #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
| bool asACompose(ComposeRec* rec) const override; |
| #endif |
| |
| SK_TO_STRING_OVERRIDE() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeShader) |
| |
| protected: |
| SkComposeShader(SkReadBuffer&); |
| void flatten(SkWriteBuffer&) const override; |
| sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override; |
| bool onAppendStages(SkRasterPipeline*, SkColorSpace* dstCS, SkArenaAlloc*, |
| const SkMatrix&, const SkPaint&, const SkMatrix* localM) const override; |
| |
| bool onIsRasterPipelineOnly(const SkMatrix&) const override { return true; } |
| |
| private: |
| sk_sp<SkShader> fDst; |
| sk_sp<SkShader> fSrc; |
| const float fLerpT; |
| const SkBlendMode fMode; |
| |
| bool isJustMode() const { return fLerpT == 1; } |
| bool isJustLerp() const { return fMode == SkBlendMode::kSrc; } |
| |
| typedef SkShaderBase INHERITED; |
| }; |
| |
| #endif |