bool GrGLGeometryShaderBuilder::compileAndAttachShaders(GrGLuint programId,
SkTDArray<GrGLuint>* shaderIds) const {
const GrGLContext& glCtx = fProgramBuilder->gpu()->glContext();
SkASSERT(fProgramBuilder->ctxInfo().glslGeneration() >= k150_GrGLSLGeneration);
SkString geomShaderSrc(GrGetGLSLVersionDecl(fProgramBuilder->ctxInfo()));
geomShaderSrc.append("layout(triangles) in;\n"
"layout(triangle_strip, max_vertices = 6) out;\n");
fProgramBuilder->appendDecls(fInputs, &geomShaderSrc);
fProgramBuilder->appendDecls(fOutputs, &geomShaderSrc);
geomShaderSrc.append("void main() {\n");
geomShaderSrc.append("\tfor (int i = 0; i < 3; ++i) {\n"
"\t\tgl_Position = gl_in[i].gl_Position;\n");
if (fProgramBuilder->desc().getHeader().fEmitsPointSize) {
geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n");
}
SkASSERT(fInputs.count() == fOutputs.count());
for (int i = 0; i < fInputs.count(); ++i) {
geomShaderSrc.appendf("\t\t%s = %s[i];\n",
fOutputs[i].getName().c_str(),
fInputs[i].getName().c_str());
}
geomShaderSrc.append("\t\tEmitVertex();\n"
"\t}\n"
"\tEndPrimitive();\n");
geomShaderSrc.append("}\n");
GrGLuint geomShaderId =
GrGLCompileAndAttachShader(glCtx, programId,
GR_GL_GEOMETRY_SHADER, geomShaderSrc,
fProgramBuilder->gpu()->gpuStats());
if (!geomShaderId) {
return false;
}
*shaderIds->append() = geomShaderId;
return true;
}
bool GrGLFullShaderBuilder::compileAndAttachShaders(GrGLuint programId,
SkTDArray<GrGLuint>* shaderIds) const {
const GrGLContext& glCtx = this->gpu()->glContext();
SkString vertShaderSrc(GrGetGLSLVersionDecl(this->ctxInfo()));
this->appendUniformDecls(kVertex_Visibility, &vertShaderSrc);
this->appendDecls(fVSAttrs, &vertShaderSrc);
this->appendDecls(fVSOutputs, &vertShaderSrc);
vertShaderSrc.append("void main() {\n");
vertShaderSrc.append(fVSCode);
vertShaderSrc.append("}\n");
GrGLuint vertShaderId = attach_shader(glCtx, programId, GR_GL_VERTEX_SHADER, vertShaderSrc);
if (!vertShaderId) {
return false;
}
*shaderIds->append() = vertShaderId;
#if GR_GL_EXPERIMENTAL_GS
if (this->desc().getHeader().fExperimentalGS) {
SkASSERT(this->ctxInfo().glslGeneration() >= k150_GrGLSLGeneration);
SkString geomShaderSrc(GrGetGLSLVersionDecl(this->ctxInfo()));
geomShaderSrc.append("layout(triangles) in;\n"
"layout(triangle_strip, max_vertices = 6) out;\n");
this->appendDecls(fGSInputs, &geomShaderSrc);
this->appendDecls(fGSOutputs, &geomShaderSrc);
geomShaderSrc.append("void main() {\n");
geomShaderSrc.append("\tfor (int i = 0; i < 3; ++i) {\n"
"\t\tgl_Position = gl_in[i].gl_Position;\n");
if (this->desc().getHeader().fEmitsPointSize) {
geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n");
}
SkASSERT(fGSInputs.count() == fGSOutputs.count());
for (int i = 0; i < fGSInputs.count(); ++i) {
geomShaderSrc.appendf("\t\t%s = %s[i];\n",
fGSOutputs[i].getName().c_str(),
fGSInputs[i].getName().c_str());
}
geomShaderSrc.append("\t\tEmitVertex();\n"
"\t}\n"
"\tEndPrimitive();\n");
geomShaderSrc.append("}\n");
GrGLuint geomShaderId = attach_shader(glCtx, programId, GR_GL_GEOMETRY_SHADER, geomShaderSrc);
if (!geomShaderId) {
return false;
}
*shaderIds->append() = geomShaderId;
}
#endif
return this->INHERITED::compileAndAttachShaders(programId, shaderIds);
}
