diff options
Diffstat (limited to 'gpu/src/GrGLProgram.cpp')
| -rw-r--r-- | gpu/src/GrGLProgram.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gpu/src/GrGLProgram.cpp b/gpu/src/GrGLProgram.cpp index cbe2f42486..4b97fab14c 100644 --- a/gpu/src/GrGLProgram.cpp +++ b/gpu/src/GrGLProgram.cpp @@ -81,6 +81,7 @@ struct ShaderCodeSegments { #define POS_ATTR_NAME "aPosition" #define COL_ATTR_NAME "aColor" +#define COV_ATTR_NAME "aCoverage" #define EDGE_ATTR_NAME "aEdge" #define COL_UNI_NAME "uColor" #define EDGES_UNI_NAME "uEdges" @@ -751,6 +752,23 @@ bool GrGLProgram::genProgram(const GrGLInterface* gl, // get edge AA coverage and use it as inCoverage to first coverage stage this->genEdgeCoverage(gl, layout, programData, &inCoverage, &segments); + // include explicit per-vertex coverage if we have it + if (GrDrawTarget::kCoverage_VertexLayoutBit & layout) { + segments.fVSAttrs.push_back().set(GrGLShaderVar::kFloat_Type, + COV_ATTR_NAME); + const char *vsName, *fsName; + append_varying(GrGLShaderVar::kFloat_Type, "Coverage", + &segments, &vsName, &fsName); + segments.fVSCode.appendf("\t%s = " COV_ATTR_NAME ";\n", vsName); + if (inCoverage.size()) { + segments.fFSCode.appendf("\tfloat edgeAndAttrCov = %s * %s;\n", + fsName, inCoverage.c_str()); + inCoverage = "edgeAndAttrCov"; + } else { + inCoverage = fsName; + } + } + GrStringBuilder outCoverage; const int& startStage = fProgramDesc.fFirstCoverageStage; for (int s = startStage; s < GrDrawTarget::kNumStages; ++s) { @@ -1100,6 +1118,8 @@ bool GrGLProgram::bindOutputsAttribsAndLinkProgram( GR_GL_CALL(gl, BindAttribLocation(progID, ColorAttributeIdx(), COL_ATTR_NAME)); + GR_GL_CALL(gl, BindAttribLocation(progID, CoverageAttributeIdx(), + COV_ATTR_NAME)); GR_GL_CALL(gl, BindAttribLocation(progID, EdgeAttributeIdx(), EDGE_ATTR_NAME)); |