1/*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef SkComposeShader_DEFINED
9#define SkComposeShader_DEFINED
10
11#include "include/core/SkBlendMode.h"
12#include "src/shaders/SkShaderBase.h"
13
14class SkShader_Blend final : public SkShaderBase {
15public:
16 SkShader_Blend(SkBlendMode mode, sk_sp<SkShader> dst, sk_sp<SkShader> src)
17 : fDst(std::move(dst))
18 , fSrc(std::move(src))
19 , fMode(mode)
20 {}
21
22#if SK_SUPPORT_GPU
23 std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
24#endif
25
26protected:
27 SkShader_Blend(SkReadBuffer&);
28 void flatten(SkWriteBuffer&) const override;
29 bool onAppendStages(const SkStageRec&) const override;
30 skvm::Color onProgram(skvm::Builder*, skvm::Coord device, skvm::Coord local, skvm::Color paint,
31 const SkMatrixProvider&, const SkMatrix* localM,
32 SkFilterQuality, const SkColorInfo& dst,
33 skvm::Uniforms*, SkArenaAlloc*) const override;
34
35private:
36 SK_FLATTENABLE_HOOKS(SkShader_Blend)
37
38 sk_sp<SkShader> fDst;
39 sk_sp<SkShader> fSrc;
40 const SkBlendMode fMode;
41
42 typedef SkShaderBase INHERITED;
43};
44
45class SkShader_Lerp final : public SkShaderBase {
46public:
47 SkShader_Lerp(float weight, sk_sp<SkShader> dst, sk_sp<SkShader> src)
48 : fDst(std::move(dst))
49 , fSrc(std::move(src))
50 , fWeight(weight)
51 {
52 SkASSERT(weight >= 0 && weight <= 1);
53 }
54
55#if SK_SUPPORT_GPU
56 std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
57#endif
58
59protected:
60 SkShader_Lerp(SkReadBuffer&);
61 void flatten(SkWriteBuffer&) const override;
62 bool onAppendStages(const SkStageRec&) const override;
63 skvm::Color onProgram(skvm::Builder*, skvm::Coord device, skvm::Coord local, skvm::Color paint,
64 const SkMatrixProvider&, const SkMatrix* localM,
65 SkFilterQuality, const SkColorInfo& dst,
66 skvm::Uniforms*, SkArenaAlloc*) const override;
67
68private:
69 SK_FLATTENABLE_HOOKS(SkShader_Lerp)
70
71 sk_sp<SkShader> fDst;
72 sk_sp<SkShader> fSrc;
73 const float fWeight;
74
75 typedef SkShaderBase INHERITED;
76};
77
78#endif
79