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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 "GrConfigConversionEffect.h" | 8 #include "GrConfigConversionEffect.h" |
9 #include "GrContext.h" | 9 #include "GrContext.h" |
10 #include "GrTBackendEffectFactory.h" | 10 #include "GrTBackendEffectFactory.h" |
11 #include "GrSimpleTextureEffect.h" | 11 #include "GrSimpleTextureEffect.h" |
12 #include "gl/GrGLEffect.h" | 12 #include "gl/GrGLEffect.h" |
13 #include "gl/GrGLShaderBuilder.h" | 13 #include "gl/builders/GrGLProgramBuilder.h" |
14 #include "SkMatrix.h" | 14 #include "SkMatrix.h" |
15 | 15 |
16 class GrGLConfigConversionEffect : public GrGLEffect { | 16 class GrGLConfigConversionEffect : public GrGLEffect { |
17 public: | 17 public: |
18 GrGLConfigConversionEffect(const GrBackendEffectFactory& factory, | 18 GrGLConfigConversionEffect(const GrBackendEffectFactory& factory, |
19 const GrDrawEffect& drawEffect) | 19 const GrDrawEffect& drawEffect) |
20 : INHERITED (factory) { | 20 : INHERITED (factory) { |
21 const GrConfigConversionEffect& effect = drawEffect.castEffect<GrConfigC
onversionEffect>(); | 21 const GrConfigConversionEffect& effect = drawEffect.castEffect<GrConfigC
onversionEffect>(); |
22 fSwapRedAndBlue = effect.swapsRedAndBlue(); | 22 fSwapRedAndBlue = effect.swapsRedAndBlue(); |
23 fPMConversion = effect.pmConversion(); | 23 fPMConversion = effect.pmConversion(); |
24 } | 24 } |
25 | 25 |
26 virtual void emitCode(GrGLShaderBuilder* builder, | 26 virtual void emitCode(GrGLProgramBuilder* builder, |
27 const GrDrawEffect&, | 27 const GrDrawEffect&, |
28 const GrEffectKey& key, | 28 const GrEffectKey& key, |
29 const char* outputColor, | 29 const char* outputColor, |
30 const char* inputColor, | 30 const char* inputColor, |
31 const TransformedCoordsArray& coords, | 31 const TransformedCoordsArray& coords, |
32 const TextureSamplerArray& samplers) SK_OVERRIDE { | 32 const TextureSamplerArray& samplers) SK_OVERRIDE { |
33 // Using highp for GLES here in order to avoid some precision issues on
specific GPUs. | 33 // Using highp for GLES here in order to avoid some precision issues on
specific GPUs. |
34 GrGLShaderVar tmpVar("tmpColor", kVec4f_GrSLType, 0, GrGLShaderVar::kHig
h_Precision); | 34 GrGLShaderVar tmpVar("tmpColor", kVec4f_GrSLType, 0, GrGLShaderVar::kHig
h_Precision); |
35 SkString tmpDecl; | 35 SkString tmpDecl; |
36 tmpVar.appendDecl(builder->ctxInfo(), &tmpDecl); | 36 tmpVar.appendDecl(builder->ctxInfo(), &tmpDecl); |
37 builder->fsCodeAppendf("%s;", tmpDecl.c_str()); | |
38 | 37 |
39 builder->fsCodeAppendf("%s = ", tmpVar.c_str()); | 38 GrGLFragmentShaderBuilder* fsBuilder = builder->getFragmentShaderBuilder
(); |
40 builder->fsAppendTextureLookup(samplers[0], coords[0].c_str(), coords[0]
.type()); | 39 |
41 builder->fsCodeAppend(";"); | 40 fsBuilder->codeAppendf("%s;", tmpDecl.c_str()); |
| 41 |
| 42 fsBuilder->codeAppendf("%s = ", tmpVar.c_str()); |
| 43 fsBuilder->appendTextureLookup(samplers[0], coords[0].c_str(), coords[0]
.type()); |
| 44 fsBuilder->codeAppend(";"); |
42 | 45 |
43 if (GrConfigConversionEffect::kNone_PMConversion == fPMConversion) { | 46 if (GrConfigConversionEffect::kNone_PMConversion == fPMConversion) { |
44 SkASSERT(fSwapRedAndBlue); | 47 SkASSERT(fSwapRedAndBlue); |
45 builder->fsCodeAppendf("%s = %s.bgra;", outputColor, tmpVar.c_str())
; | 48 fsBuilder->codeAppendf("%s = %s.bgra;", outputColor, tmpVar.c_str())
; |
46 } else { | 49 } else { |
47 const char* swiz = fSwapRedAndBlue ? "bgr" : "rgb"; | 50 const char* swiz = fSwapRedAndBlue ? "bgr" : "rgb"; |
48 switch (fPMConversion) { | 51 switch (fPMConversion) { |
49 case GrConfigConversionEffect::kMulByAlpha_RoundUp_PMConversion: | 52 case GrConfigConversionEffect::kMulByAlpha_RoundUp_PMConversion: |
50 builder->fsCodeAppendf( | 53 fsBuilder->codeAppendf( |
51 "%s = vec4(ceil(%s.%s * %s.a * 255.0) / 255.0, %s.a);", | 54 "%s = vec4(ceil(%s.%s * %s.a * 255.0) / 255.0, %s.a);", |
52 tmpVar.c_str(), tmpVar.c_str(), swiz, tmpVar.c_str(), tm
pVar.c_str()); | 55 tmpVar.c_str(), tmpVar.c_str(), swiz, tmpVar.c_str(), tm
pVar.c_str()); |
53 break; | 56 break; |
54 case GrConfigConversionEffect::kMulByAlpha_RoundDown_PMConversio
n: | 57 case GrConfigConversionEffect::kMulByAlpha_RoundDown_PMConversio
n: |
55 // Add a compensation(0.001) here to avoid the side effect o
f the floor operation. | 58 // Add a compensation(0.001) here to avoid the side effect o
f the floor operation. |
56 // In Intel GPUs, the integer value converted from floor(%s.
r * 255.0) / 255.0 | 59 // In Intel GPUs, the integer value converted from floor(%s.
r * 255.0) / 255.0 |
57 // is less than the integer value converted from %s.r by 1
when the %s.r is | 60 // is less than the integer value converted from %s.r by 1
when the %s.r is |
58 // converted from the integer value 2^n, such as 1, 2, 4, 8,
etc. | 61 // converted from the integer value 2^n, such as 1, 2, 4, 8,
etc. |
59 builder->fsCodeAppendf( | 62 fsBuilder->codeAppendf( |
60 "%s = vec4(floor(%s.%s * %s.a * 255.0 + 0.001) / 255.0,
%s.a);", | 63 "%s = vec4(floor(%s.%s * %s.a * 255.0 + 0.001) / 255.0,
%s.a);", |
61 tmpVar.c_str(), tmpVar.c_str(), swiz, tmpVar.c_str(), tm
pVar.c_str()); | 64 tmpVar.c_str(), tmpVar.c_str(), swiz, tmpVar.c_str(), tm
pVar.c_str()); |
62 break; | 65 break; |
63 case GrConfigConversionEffect::kDivByAlpha_RoundUp_PMConversion: | 66 case GrConfigConversionEffect::kDivByAlpha_RoundUp_PMConversion: |
64 builder->fsCodeAppendf( | 67 fsBuilder->codeAppendf( |
65 "%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(ceil(%s.%s / %s
.a * 255.0) / 255.0, %s.a);", | 68 "%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(ceil(%s.%s / %s
.a * 255.0) / 255.0, %s.a);", |
66 tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), swiz, tm
pVar.c_str(), tmpVar.c_str()); | 69 tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), swiz, tm
pVar.c_str(), tmpVar.c_str()); |
67 break; | 70 break; |
68 case GrConfigConversionEffect::kDivByAlpha_RoundDown_PMConversio
n: | 71 case GrConfigConversionEffect::kDivByAlpha_RoundDown_PMConversio
n: |
69 builder->fsCodeAppendf( | 72 fsBuilder->codeAppendf( |
70 "%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(floor(%s.%s / %
s.a * 255.0) / 255.0, %s.a);", | 73 "%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(floor(%s.%s / %
s.a * 255.0) / 255.0, %s.a);", |
71 tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), swiz, tm
pVar.c_str(), tmpVar.c_str()); | 74 tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), swiz, tm
pVar.c_str(), tmpVar.c_str()); |
72 break; | 75 break; |
73 default: | 76 default: |
74 SkFAIL("Unknown conversion op."); | 77 SkFAIL("Unknown conversion op."); |
75 break; | 78 break; |
76 } | 79 } |
77 builder->fsCodeAppendf("%s = %s;", outputColor, tmpVar.c_str()); | 80 fsBuilder->codeAppendf("%s = %s;", outputColor, tmpVar.c_str()); |
78 } | 81 } |
79 SkString modulate; | 82 SkString modulate; |
80 GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor); | 83 GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor); |
81 builder->fsCodeAppend(modulate.c_str()); | 84 fsBuilder->codeAppend(modulate.c_str()); |
82 } | 85 } |
83 | 86 |
84 static inline void GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&, | 87 static inline void GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&, |
85 GrEffectKeyBuilder* b) { | 88 GrEffectKeyBuilder* b) { |
86 const GrConfigConversionEffect& conv = drawEffect.castEffect<GrConfigCon
versionEffect>(); | 89 const GrConfigConversionEffect& conv = drawEffect.castEffect<GrConfigCon
versionEffect>(); |
87 uint32_t key = (conv.swapsRedAndBlue() ? 0 : 1) | (conv.pmConversion() <
< 1); | 90 uint32_t key = (conv.swapsRedAndBlue() ? 0 : 1) | (conv.pmConversion() <
< 1); |
88 b->add32(key); | 91 b->add32(key); |
89 } | 92 } |
90 | 93 |
91 private: | 94 private: |
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275 kNone_PMConversion != pmConversion) { | 278 kNone_PMConversion != pmConversion) { |
276 // The PM conversions assume colors are 0..255 | 279 // The PM conversions assume colors are 0..255 |
277 return NULL; | 280 return NULL; |
278 } | 281 } |
279 return SkNEW_ARGS(GrConfigConversionEffect, (texture, | 282 return SkNEW_ARGS(GrConfigConversionEffect, (texture, |
280 swapRedAndBlue, | 283 swapRedAndBlue, |
281 pmConversion, | 284 pmConversion, |
282 matrix)); | 285 matrix)); |
283 } | 286 } |
284 } | 287 } |
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