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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 geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n"); | 51 if (fProgramBuilder->desc().header().fEmitsPointSize) { |
| 52 geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n"); |
| 53 } |
52 SkASSERT(fInputs.count() == fOutputs.count()); | 54 SkASSERT(fInputs.count() == fOutputs.count()); |
53 for (int i = 0; i < fInputs.count(); ++i) { | 55 for (int i = 0; i < fInputs.count(); ++i) { |
54 geomShaderSrc.appendf("\t\t%s = %s[i];\n", | 56 geomShaderSrc.appendf("\t\t%s = %s[i];\n", |
55 fOutputs[i].getName().c_str(), | 57 fOutputs[i].getName().c_str(), |
56 fInputs[i].getName().c_str()); | 58 fInputs[i].getName().c_str()); |
57 } | 59 } |
58 geomShaderSrc.append("\t\tEmitVertex();\n" | 60 geomShaderSrc.append("\t\tEmitVertex();\n" |
59 "\t}\n" | 61 "\t}\n" |
60 "\tEndPrimitive();\n"); | 62 "\tEndPrimitive();\n"); |
61 geomShaderSrc.append("}\n"); | 63 geomShaderSrc.append("}\n"); |
62 GrGLuint geomShaderId = | 64 GrGLuint geomShaderId = |
63 GrGLCompileAndAttachShader(glCtx, programId, | 65 GrGLCompileAndAttachShader(glCtx, programId, |
64 GR_GL_GEOMETRY_SHADER, geomShaderSrc, | 66 GR_GL_GEOMETRY_SHADER, geomShaderSrc, |
65 fProgramBuilder->gpu()->gpuStats()); | 67 fProgramBuilder->gpu()->gpuStats()); |
66 if (!geomShaderId) { | 68 if (!geomShaderId) { |
67 return false; | 69 return false; |
68 } | 70 } |
69 *shaderIds->append() = geomShaderId; | 71 *shaderIds->append() = geomShaderId; |
70 return true; | 72 return true; |
71 } | 73 } |
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