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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 "GrGLGeometryShaderBuilder.h" | 8 #include "GrGLGeometryShaderBuilder.h" |
9 #include "GrGLShaderStringBuilder.h" | |
10 #include "GrGLProgramBuilder.h" | 9 #include "GrGLProgramBuilder.h" |
11 #include "../GrGLGpu.h" | 10 #include "../GrGLGpu.h" |
12 | 11 |
13 GrGLGeometryBuilder::GrGLGeometryBuilder(GrGLProgramBuilder* program) | 12 GrGLGeometryBuilder::GrGLGeometryBuilder(GrGLProgramBuilder* program) |
14 : INHERITED(program) { | 13 : INHERITED(program) { |
15 | 14 |
16 } | 15 } |
17 | 16 |
18 void GrGLGeometryBuilder::addVarying(const char* name, GrGLVarying* v) { | 17 void GrGLGeometryBuilder::addVarying(const char* name, GrGLVarying* v) { |
19 // if we have a GS take each varying in as an array | 18 // if we have a GS take each varying in as an array |
(...skipping 10 matching lines...) Expand all Loading... |
30 if (v->fsVarying()) { | 29 if (v->fsVarying()) { |
31 fOutputs.push_back(); | 30 fOutputs.push_back(); |
32 fOutputs.back().setType(v->fType); | 31 fOutputs.back().setType(v->fType); |
33 fOutputs.back().setTypeModifier(GrGLShaderVar::kVaryingOut_TypeModifier)
; | 32 fOutputs.back().setTypeModifier(GrGLShaderVar::kVaryingOut_TypeModifier)
; |
34 fProgramBuilder->nameVariable(fOutputs.back().accessName(), 'g', name); | 33 fProgramBuilder->nameVariable(fOutputs.back().accessName(), 'g', name); |
35 v->fGsOut = fOutputs.back().getName().c_str(); | 34 v->fGsOut = fOutputs.back().getName().c_str(); |
36 } | 35 } |
37 } | 36 } |
38 | 37 |
39 bool GrGLGeometryBuilder::compileAndAttachShaders(GrGLuint programId, | 38 bool GrGLGeometryBuilder::compileAndAttachShaders(GrGLuint programId, |
40 SkTDArray<GrGLuint>* shaderIds) const { | 39 SkTDArray<GrGLuint>* shaderIds) { |
41 const GrGLContext& glCtx = fProgramBuilder->gpu()->glContext(); | 40 SkFAIL("Geometry shaders are not currently supported"); |
42 SkASSERT(fProgramBuilder->ctxInfo().glslGeneration() >= k150_GrGLSLGeneratio
n); | 41 return false; |
43 SkString geomShaderSrc(GrGetGLSLVersionDecl(fProgramBuilder->ctxInfo())); | |
44 geomShaderSrc.append("layout(triangles) in;\n" | |
45 "layout(triangle_strip, max_vertices = 6) out;\n"); | |
46 this->appendDecls(fInputs, &geomShaderSrc); | |
47 this->appendDecls(fOutputs, &geomShaderSrc); | |
48 geomShaderSrc.append("void main() {\n"); | |
49 geomShaderSrc.append("\tfor (int i = 0; i < 3; ++i) {\n" | |
50 "\t\tgl_Position = gl_in[i].gl_Position;\n"); | |
51 geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n"); | |
52 SkASSERT(fInputs.count() == fOutputs.count()); | |
53 for (int i = 0; i < fInputs.count(); ++i) { | |
54 geomShaderSrc.appendf("\t\t%s = %s[i];\n", | |
55 fOutputs[i].getName().c_str(), | |
56 fInputs[i].getName().c_str()); | |
57 } | |
58 geomShaderSrc.append("\t\tEmitVertex();\n" | |
59 "\t}\n" | |
60 "\tEndPrimitive();\n"); | |
61 geomShaderSrc.append("}\n"); | |
62 GrGLuint geomShaderId = | |
63 GrGLCompileAndAttachShader(glCtx, programId, | |
64 GR_GL_GEOMETRY_SHADER, geomShaderSrc, | |
65 fProgramBuilder->gpu()->stats()); | |
66 if (!geomShaderId) { | |
67 return false; | |
68 } | |
69 *shaderIds->append() = geomShaderId; | |
70 return true; | |
71 } | 42 } |
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