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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 "GrGLFragmentShaderBuilder.h" | 8 #include "GrGLFragmentShaderBuilder.h" |
9 #include "GrGLShaderStringBuilder.h" | 9 #include "GrGLShaderStringBuilder.h" |
10 #include "GrGLProgramBuilder.h" | 10 #include "GrGLProgramBuilder.h" |
11 #include "../GrGpuGL.h" | 11 #include "../GrGpuGL.h" |
12 | 12 |
13 #define GL_CALL(X) GR_GL_CALL(fProgramBuilder->gpu()->glInterface(), X) | 13 #define GL_CALL(X) GR_GL_CALL(fProgramBuilder->gpu()->glInterface(), X) |
14 #define GL_CALL_RET(R, X) GR_GL_CALL_RET(fProgramBuilder->gpu()->glInterface(),
R, X) | 14 #define GL_CALL_RET(R, X) GR_GL_CALL_RET(fProgramBuilder->gpu()->glInterface(),
R, X) |
15 | 15 |
16 // ES2 FS only guarantees mediump and lowp support | |
17 static const GrGLShaderVar::Precision kDefaultFragmentPrecision = GrGLShaderVar:
:kMedium_Precision; | |
18 const char* GrGLFragmentShaderBuilder::kDstCopyColorName = "_dstColor"; | 16 const char* GrGLFragmentShaderBuilder::kDstCopyColorName = "_dstColor"; |
19 static const char* declared_color_output_name() { return "fsColorOut"; } | 17 static const char* declared_color_output_name() { return "fsColorOut"; } |
20 static const char* dual_source_output_name() { return "dualSourceOut"; } | 18 static const char* dual_source_output_name() { return "dualSourceOut"; } |
21 static void append_default_precision_qualifier(GrGLShaderVar::Precision p, | 19 static void append_default_precision_qualifier(GrGLShaderVar::Precision p, |
22 GrGLStandard standard, | 20 GrGLStandard standard, |
23 SkString* str) { | 21 SkString* str) { |
24 // Desktop GLSL has added precision qualifiers but they don't do anything. | 22 // Desktop GLSL has added precision qualifiers but they don't do anything. |
25 if (kGLES_GrGLStandard == standard) { | 23 if (kGLES_GrGLStandard == standard) { |
26 switch (p) { | 24 switch (p) { |
27 case GrGLShaderVar::kHigh_Precision: | 25 case GrGLShaderVar::kHigh_Precision: |
28 str->append("precision highp float;\n"); | 26 str->append("precision highp float;\n"); |
29 break; | 27 break; |
30 case GrGLShaderVar::kMedium_Precision: | 28 case GrGLShaderVar::kMedium_Precision: |
31 str->append("precision mediump float;\n"); | 29 str->append("precision mediump float;\n"); |
32 break; | 30 break; |
33 case GrGLShaderVar::kLow_Precision: | 31 case GrGLShaderVar::kLow_Precision: |
34 str->append("precision lowp float;\n"); | 32 str->append("precision lowp float;\n"); |
35 break; | 33 break; |
36 case GrGLShaderVar::kDefault_Precision: | |
37 SkFAIL("Default precision now allowed."); | |
38 default: | 34 default: |
39 SkFAIL("Unknown precision value."); | 35 SkFAIL("Unknown precision value."); |
40 } | 36 } |
41 } | 37 } |
42 } | 38 } |
43 | 39 |
44 GrGLFragmentShaderBuilder::DstReadKey | 40 GrGLFragmentShaderBuilder::DstReadKey |
45 GrGLFragmentShaderBuilder::KeyForDstRead(const GrTexture* dstCopy, const GrGLCap
s& caps) { | 41 GrGLFragmentShaderBuilder::KeyForDstRead(const GrTexture* dstCopy, const GrGLCap
s& caps) { |
46 uint32_t key = kYesDstRead_DstReadKeyBit; | 42 uint32_t key = kYesDstRead_DstReadKeyBit; |
47 if (caps.fbFetchSupport()) { | 43 if (caps.fbFetchSupport()) { |
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303 } | 299 } |
304 | 300 |
305 this->codeAppendf("\t%s = %s;\n", this->getPrimaryColorOutputName(), fragCol
or.c_str()); | 301 this->codeAppendf("\t%s = %s;\n", this->getPrimaryColorOutputName(), fragCol
or.c_str()); |
306 } | 302 } |
307 | 303 |
308 bool GrGLFragmentShaderBuilder::compileAndAttachShaders(GrGLuint programId, | 304 bool GrGLFragmentShaderBuilder::compileAndAttachShaders(GrGLuint programId, |
309 SkTDArray<GrGLuint>* sha
derIds) const { | 305 SkTDArray<GrGLuint>* sha
derIds) const { |
310 GrGpuGL* gpu = fProgramBuilder->gpu(); | 306 GrGpuGL* gpu = fProgramBuilder->gpu(); |
311 SkString fragShaderSrc(GrGetGLSLVersionDecl(gpu->ctxInfo())); | 307 SkString fragShaderSrc(GrGetGLSLVersionDecl(gpu->ctxInfo())); |
312 fragShaderSrc.append(fExtensions); | 308 fragShaderSrc.append(fExtensions); |
313 append_default_precision_qualifier(kDefaultFragmentPrecision, | 309 append_default_precision_qualifier(GrShaderVar::kDefault_Precision, |
314 gpu->glStandard(), | 310 gpu->glStandard(), |
315 &fragShaderSrc); | 311 &fragShaderSrc); |
316 fProgramBuilder->appendUniformDecls(GrGLProgramBuilder::kFragment_Visibility
, &fragShaderSrc); | 312 fProgramBuilder->appendUniformDecls(GrGLProgramBuilder::kFragment_Visibility
, &fragShaderSrc); |
317 this->appendDecls(fInputs, &fragShaderSrc); | 313 this->appendDecls(fInputs, &fragShaderSrc); |
318 // We shouldn't have declared outputs on 1.10 | 314 // We shouldn't have declared outputs on 1.10 |
319 SkASSERT(k110_GrGLSLGeneration != gpu->glslGeneration() || fOutputs.empty())
; | 315 SkASSERT(k110_GrGLSLGeneration != gpu->glslGeneration() || fOutputs.empty())
; |
320 this->appendDecls(fOutputs, &fragShaderSrc); | 316 this->appendDecls(fOutputs, &fragShaderSrc); |
321 fragShaderSrc.append(fFunctions); | 317 fragShaderSrc.append(fFunctions); |
322 fragShaderSrc.append("void main() {\n"); | 318 fragShaderSrc.append("void main() {\n"); |
323 fragShaderSrc.append(fCode); | 319 fragShaderSrc.append(fCode); |
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346 } | 342 } |
347 } | 343 } |
348 | 344 |
349 void GrGLFragmentShaderBuilder::addVarying(GrGLVarying* v, GrGLShaderVar::Precis
ion fsPrec) { | 345 void GrGLFragmentShaderBuilder::addVarying(GrGLVarying* v, GrGLShaderVar::Precis
ion fsPrec) { |
350 v->fFsIn = v->fVsOut; | 346 v->fFsIn = v->fVsOut; |
351 if (v->fGsOut) { | 347 if (v->fGsOut) { |
352 v->fFsIn = v->fGsOut; | 348 v->fFsIn = v->fGsOut; |
353 } | 349 } |
354 fInputs.push_back().set(v->fType, GrGLShaderVar::kVaryingIn_TypeModifier, v-
>fFsIn, fsPrec); | 350 fInputs.push_back().set(v->fType, GrGLShaderVar::kVaryingIn_TypeModifier, v-
>fFsIn, fsPrec); |
355 } | 351 } |
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