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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" | 9 #include "GrGLShaderStringBuilder.h" |
10 #include "GrGLProgramBuilder.h" | 10 #include "GrGLProgramBuilder.h" |
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41 const GrGLContext& glCtx = fProgramBuilder->gpu()->glContext(); | 41 const GrGLContext& glCtx = fProgramBuilder->gpu()->glContext(); |
42 SkASSERT(fProgramBuilder->ctxInfo().glslGeneration() >= k150_GrGLSLGeneratio
n); | 42 SkASSERT(fProgramBuilder->ctxInfo().glslGeneration() >= k150_GrGLSLGeneratio
n); |
43 SkString geomShaderSrc(GrGetGLSLVersionDecl(fProgramBuilder->ctxInfo())); | 43 SkString geomShaderSrc(GrGetGLSLVersionDecl(fProgramBuilder->ctxInfo())); |
44 geomShaderSrc.append("layout(triangles) in;\n" | 44 geomShaderSrc.append("layout(triangles) in;\n" |
45 "layout(triangle_strip, max_vertices = 6) out;\n"); | 45 "layout(triangle_strip, max_vertices = 6) out;\n"); |
46 this->appendDecls(fInputs, &geomShaderSrc); | 46 this->appendDecls(fInputs, &geomShaderSrc); |
47 this->appendDecls(fOutputs, &geomShaderSrc); | 47 this->appendDecls(fOutputs, &geomShaderSrc); |
48 geomShaderSrc.append("void main() {\n"); | 48 geomShaderSrc.append("void main() {\n"); |
49 geomShaderSrc.append("\tfor (int i = 0; i < 3; ++i) {\n" | 49 geomShaderSrc.append("\tfor (int i = 0; i < 3; ++i) {\n" |
50 "\t\tgl_Position = gl_in[i].gl_Position;\n"); | 50 "\t\tgl_Position = gl_in[i].gl_Position;\n"); |
51 if (fProgramBuilder->desc().header().fEmitsPointSize) { | 51 geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n"); |
52 geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n"); | |
53 } | |
54 SkASSERT(fInputs.count() == fOutputs.count()); | 52 SkASSERT(fInputs.count() == fOutputs.count()); |
55 for (int i = 0; i < fInputs.count(); ++i) { | 53 for (int i = 0; i < fInputs.count(); ++i) { |
56 geomShaderSrc.appendf("\t\t%s = %s[i];\n", | 54 geomShaderSrc.appendf("\t\t%s = %s[i];\n", |
57 fOutputs[i].getName().c_str(), | 55 fOutputs[i].getName().c_str(), |
58 fInputs[i].getName().c_str()); | 56 fInputs[i].getName().c_str()); |
59 } | 57 } |
60 geomShaderSrc.append("\t\tEmitVertex();\n" | 58 geomShaderSrc.append("\t\tEmitVertex();\n" |
61 "\t}\n" | 59 "\t}\n" |
62 "\tEndPrimitive();\n"); | 60 "\tEndPrimitive();\n"); |
63 geomShaderSrc.append("}\n"); | 61 geomShaderSrc.append("}\n"); |
64 GrGLuint geomShaderId = | 62 GrGLuint geomShaderId = |
65 GrGLCompileAndAttachShader(glCtx, programId, | 63 GrGLCompileAndAttachShader(glCtx, programId, |
66 GR_GL_GEOMETRY_SHADER, geomShaderSrc, | 64 GR_GL_GEOMETRY_SHADER, geomShaderSrc, |
67 fProgramBuilder->gpu()->gpuStats()); | 65 fProgramBuilder->gpu()->gpuStats()); |
68 if (!geomShaderId) { | 66 if (!geomShaderId) { |
69 return false; | 67 return false; |
70 } | 68 } |
71 *shaderIds->append() = geomShaderId; | 69 *shaderIds->append() = geomShaderId; |
72 return true; | 70 return true; |
73 } | 71 } |
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