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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "GrDitherEffect.h" | 8 #include "GrDitherEffect.h" |
9 #include "GrFragmentProcessor.h" | 9 #include "GrFragmentProcessor.h" |
10 #include "GrInvariantOutput.h" | 10 #include "GrInvariantOutput.h" |
11 #include "SkRect.h" | 11 #include "SkRect.h" |
12 #include "gl/GrGLFragmentProcessor.h" | 12 #include "glsl/GrGLSLFragmentProcessor.h" |
13 #include "glsl/GrGLSLFragmentShaderBuilder.h" | 13 #include "glsl/GrGLSLFragmentShaderBuilder.h" |
14 #include "glsl/GrGLSLProgramBuilder.h" | 14 #include "glsl/GrGLSLProgramBuilder.h" |
15 | 15 |
16 ////////////////////////////////////////////////////////////////////////////// | 16 ////////////////////////////////////////////////////////////////////////////// |
17 | 17 |
18 class DitherEffect : public GrFragmentProcessor { | 18 class DitherEffect : public GrFragmentProcessor { |
19 public: | 19 public: |
20 static GrFragmentProcessor* Create() { | 20 static GrFragmentProcessor* Create() { |
21 return new DitherEffect; | 21 return new DitherEffect; |
22 } | 22 } |
23 | 23 |
24 virtual ~DitherEffect() {}; | 24 virtual ~DitherEffect() {}; |
25 | 25 |
26 const char* name() const override { return "Dither"; } | 26 const char* name() const override { return "Dither"; } |
27 | 27 |
28 private: | 28 private: |
29 DitherEffect() { | 29 DitherEffect() { |
30 this->initClassID<DitherEffect>(); | 30 this->initClassID<DitherEffect>(); |
31 this->setWillReadFragmentPosition(); | 31 this->setWillReadFragmentPosition(); |
32 } | 32 } |
33 | 33 |
34 GrGLFragmentProcessor* onCreateGLInstance() const override; | 34 GrGLSLFragmentProcessor* onCreateGLInstance() const override; |
35 | 35 |
36 void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const ov
erride; | 36 void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const ov
erride; |
37 | 37 |
38 // All dither effects are equal | 38 // All dither effects are equal |
39 bool onIsEqual(const GrFragmentProcessor&) const override { return true; } | 39 bool onIsEqual(const GrFragmentProcessor&) const override { return true; } |
40 | 40 |
41 void onComputeInvariantOutput(GrInvariantOutput* inout) const override; | 41 void onComputeInvariantOutput(GrInvariantOutput* inout) const override; |
42 | 42 |
43 GR_DECLARE_FRAGMENT_PROCESSOR_TEST; | 43 GR_DECLARE_FRAGMENT_PROCESSOR_TEST; |
44 | 44 |
45 typedef GrFragmentProcessor INHERITED; | 45 typedef GrFragmentProcessor INHERITED; |
46 }; | 46 }; |
47 | 47 |
48 void DitherEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const { | 48 void DitherEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const { |
49 inout->setToUnknown(GrInvariantOutput::kWill_ReadInput); | 49 inout->setToUnknown(GrInvariantOutput::kWill_ReadInput); |
50 } | 50 } |
51 | 51 |
52 ////////////////////////////////////////////////////////////////////////////// | 52 ////////////////////////////////////////////////////////////////////////////// |
53 | 53 |
54 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(DitherEffect); | 54 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(DitherEffect); |
55 | 55 |
56 const GrFragmentProcessor* DitherEffect::TestCreate(GrProcessorTestData*) { | 56 const GrFragmentProcessor* DitherEffect::TestCreate(GrProcessorTestData*) { |
57 return DitherEffect::Create(); | 57 return DitherEffect::Create(); |
58 } | 58 } |
59 | 59 |
60 ////////////////////////////////////////////////////////////////////////////// | 60 ////////////////////////////////////////////////////////////////////////////// |
61 | 61 |
62 class GLDitherEffect : public GrGLFragmentProcessor { | 62 class GLDitherEffect : public GrGLSLFragmentProcessor { |
63 public: | 63 public: |
64 GLDitherEffect(const GrProcessor&); | 64 GLDitherEffect(const GrProcessor&); |
65 | 65 |
66 virtual void emitCode(EmitArgs& args) override; | 66 virtual void emitCode(EmitArgs& args) override; |
67 | 67 |
68 private: | 68 private: |
69 typedef GrGLFragmentProcessor INHERITED; | 69 typedef GrGLSLFragmentProcessor INHERITED; |
70 }; | 70 }; |
71 | 71 |
72 GLDitherEffect::GLDitherEffect(const GrProcessor&) { | 72 GLDitherEffect::GLDitherEffect(const GrProcessor&) { |
73 } | 73 } |
74 | 74 |
75 void GLDitherEffect::emitCode(EmitArgs& args) { | 75 void GLDitherEffect::emitCode(EmitArgs& args) { |
76 GrGLSLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder()
; | 76 GrGLSLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder()
; |
77 // Generate a random number based on the fragment position. For this | 77 // Generate a random number based on the fragment position. For this |
78 // random number generator, we use the "GLSL rand" function | 78 // random number generator, we use the "GLSL rand" function |
79 // that seems to be floating around on the internet. It works under | 79 // that seems to be floating around on the internet. It works under |
(...skipping 10 matching lines...) Expand all Loading... |
90 args.fOutputColor, GrGLSLExpr4(args.fInputColor).c_st
r()); | 90 args.fOutputColor, GrGLSLExpr4(args.fInputColor).c_st
r()); |
91 } | 91 } |
92 | 92 |
93 ////////////////////////////////////////////////////////////////////////////// | 93 ////////////////////////////////////////////////////////////////////////////// |
94 | 94 |
95 void DitherEffect::onGetGLProcessorKey(const GrGLSLCaps& caps, | 95 void DitherEffect::onGetGLProcessorKey(const GrGLSLCaps& caps, |
96 GrProcessorKeyBuilder* b) const { | 96 GrProcessorKeyBuilder* b) const { |
97 GLDitherEffect::GenKey(*this, caps, b); | 97 GLDitherEffect::GenKey(*this, caps, b); |
98 } | 98 } |
99 | 99 |
100 GrGLFragmentProcessor* DitherEffect::onCreateGLInstance() const { | 100 GrGLSLFragmentProcessor* DitherEffect::onCreateGLInstance() const { |
101 return new GLDitherEffect(*this); | 101 return new GLDitherEffect(*this); |
102 } | 102 } |
103 | 103 |
104 GrFragmentProcessor* GrDitherEffect::Create() { return DitherEffect::Create(); } | 104 GrFragmentProcessor* GrDitherEffect::Create() { return DitherEffect::Create(); } |
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