Move GrGLProgramDesc::Build to new cpp file.

src/gpu/gl/GrGLProgram.cpp

Index: src/gpu/gl/GrGLProgram.cpp
===================================================================
--- src/gpu/gl/GrGLProgram.cpp	(revision 8411)
+++ src/gpu/gl/GrGLProgram.cpp	(working copy)
@@ -13,7 +13,6 @@
 #include "GrGLEffect.h"
 #include "GrGpuGL.h"
 #include "GrGLShaderVar.h"
-#include "GrBackendEffectFactory.h"
 #include "SkTrace.h"
 #include "SkXfermode.h"
 
@@ -36,193 +35,6 @@
 inline const char* dual_source_output_name() { return "dualSourceOut"; }
 }
 
-void GrGLProgramDesc::Build(const GrDrawState& drawState,
-                            bool isPoints,
-                            GrDrawState::BlendOptFlags blendOpts,
-                            GrBlendCoeff srcCoeff,
-                            GrBlendCoeff dstCoeff,
-                            const GrGpuGL* gpu,
-                            GrGLProgramDesc* desc) {
-
-    // This should already have been caught
-    GrAssert(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts));
-
-    bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
-
-    bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag |
-                                           GrDrawState::kEmitCoverage_BlendOptFlag));
-
-    // The descriptor is used as a cache key. Thus when a field of the
-    // descriptor will not affect program generation (because of the attribute
-    // bindings in use or other descriptor field settings) it should be set
-    // to a canonical value to avoid duplicate programs with different keys.
-
-    // Must initialize all fields or cache will have false negatives!
-    desc->fAttribBindings = drawState.getAttribBindings();
-
-    desc->fEmitsPointSize = isPoints;
-
-    bool requiresAttributeColors =
-        !skipColor && SkToBool(desc->fAttribBindings & GrDrawState::kColor_AttribBindingsBit);
-    bool requiresAttributeCoverage =
-        !skipCoverage && SkToBool(desc->fAttribBindings & GrDrawState::kCoverage_AttribBindingsBit);
-
-    // fColorInput/fCoverageInput records how colors are specified for the program So we strip the
-    // bits from the bindings to avoid false negatives when searching for an existing program in the
-    // cache.
-    desc->fAttribBindings &=
-        ~(GrDrawState::kColor_AttribBindingsBit | GrDrawState::kCoverage_AttribBindingsBit);
-
-    desc->fColorFilterXfermode = skipColor ?
-                                SkXfermode::kDst_Mode :
-                                drawState.getColorFilterMode();
-
-    // no reason to do edge aa or look at per-vertex coverage if coverage is ignored
-    if (skipCoverage) {
-        desc->fAttribBindings &= ~(GrDrawState::kCoverage_AttribBindingsBit);
-    }
-
-    bool colorIsTransBlack = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
-    bool colorIsSolidWhite = (blendOpts & GrDrawState::kEmitCoverage_BlendOptFlag) ||
-                             (!requiresAttributeColors && 0xffffffff == drawState.getColor());
-    if (colorIsTransBlack) {
-        desc->fColorInput = kTransBlack_ColorInput;
-    } else if (colorIsSolidWhite) {
-        desc->fColorInput = kSolidWhite_ColorInput;
-    } else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresAttributeColors) {
-        desc->fColorInput = kUniform_ColorInput;
-    } else {
-        desc->fColorInput = kAttribute_ColorInput;
-    }
-
-    bool covIsSolidWhite = !requiresAttributeCoverage && 0xffffffff == drawState.getCoverage();
-
-    if (skipCoverage) {
-        desc->fCoverageInput = kTransBlack_ColorInput;
-    } else if (covIsSolidWhite) {
-        desc->fCoverageInput = kSolidWhite_ColorInput;
-    } else if (GR_GL_NO_CONSTANT_ATTRIBUTES && !requiresAttributeCoverage) {
-        desc->fCoverageInput = kUniform_ColorInput;
-    } else {
-        desc->fCoverageInput = kAttribute_ColorInput;
-    }
-
-    int lastEnabledStage = -1;
-
-    for (int s = 0; s < GrDrawState::kNumStages; ++s) {
-
-        bool skip = s < drawState.getFirstCoverageStage() ? skipColor : skipCoverage;
-        if (!skip && drawState.isStageEnabled(s)) {
-            lastEnabledStage = s;
-            const GrEffectRef& effect = *drawState.getStage(s).getEffect();
-            const GrBackendEffectFactory& factory = effect->getFactory();
-            bool explicitLocalCoords = (drawState.getAttribBindings() &
-                                        GrDrawState::kLocalCoords_AttribBindingsBit);
-            GrDrawEffect drawEffect(drawState.getStage(s), explicitLocalCoords);
-            desc->fEffectKeys[s] = factory.glEffectKey(drawEffect, gpu->glCaps());
-        } else {
-            desc->fEffectKeys[s] = 0;
-        }
-    }
-
-    desc->fDualSrcOutput = kNone_DualSrcOutput;
-
-    // Currently the experimental GS will only work with triangle prims (and it doesn't do anything
-    // other than pass through values from the VS to the FS anyway).
-#if GR_GL_EXPERIMENTAL_GS
-#if 0
-    desc->fExperimentalGS = gpu->caps().geometryShaderSupport();
-#else
-    desc->fExperimentalGS = false;
-#endif
-#endif
-
-    // We leave this set to kNumStages until we discover that the coverage/color distinction is
-    // material to the generated program. We do this to avoid distinct keys that generate equivalent
-    // programs.
-    desc->fFirstCoverageStage = GrDrawState::kNumStages;
-    // This tracks the actual first coverage stage.
-    int firstCoverageStage = GrDrawState::kNumStages;
-    desc->fDiscardIfZeroCoverage = false; // Enabled below if stenciling and there is coverage.
-    bool hasCoverage = false;
-    // If we're rendering coverage-as-color then its as though there are no coverage stages.
-    if (!drawState.isCoverageDrawing()) {
-        // We can have coverage either through a stage or coverage vertex attributes.
-        if (drawState.getFirstCoverageStage() <= lastEnabledStage) {
-            firstCoverageStage = drawState.getFirstCoverageStage();
-            hasCoverage = true;
-        } else {
-            hasCoverage = requiresAttributeCoverage;
-        }
-    }
-
-    if (hasCoverage) {
-        // color filter is applied between color/coverage computation
-        if (SkXfermode::kDst_Mode != desc->fColorFilterXfermode) {
-            desc->fFirstCoverageStage = firstCoverageStage;
-        }
-
-        // If we're stenciling then we want to discard samples that have zero coverage
-        if (drawState.getStencil().doesWrite()) {
-            desc->fDiscardIfZeroCoverage = true;
-            desc->fFirstCoverageStage = firstCoverageStage;
-        }
-
-        if (gpu->caps()->dualSourceBlendingSupport() &&
-            !(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag |
-                           GrDrawState::kCoverageAsAlpha_BlendOptFlag))) {
-            if (kZero_GrBlendCoeff == dstCoeff) {
-                // write the coverage value to second color
-                desc->fDualSrcOutput =  kCoverage_DualSrcOutput;
-                desc->fFirstCoverageStage = firstCoverageStage;
-            } else if (kSA_GrBlendCoeff == dstCoeff) {
-                // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
-                desc->fDualSrcOutput = kCoverageISA_DualSrcOutput;
-                desc->fFirstCoverageStage = firstCoverageStage;
-            } else if (kSC_GrBlendCoeff == dstCoeff) {
-                // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
-                desc->fDualSrcOutput = kCoverageISC_DualSrcOutput;
-                desc->fFirstCoverageStage = firstCoverageStage;
-            }
-        }
-    }
-
-    desc->fPositionAttributeIndex = drawState.getAttribIndex(GrDrawState::kPosition_AttribIndex);
-    if (requiresAttributeColors) {
-        desc->fColorAttributeIndex = drawState.getAttribIndex(GrDrawState::kColor_AttribIndex);
-    } else {
-        desc->fColorAttributeIndex = GrDrawState::kColorOverrideAttribIndexValue;
-    }
-    if (requiresAttributeCoverage) {
-        desc->fCoverageAttributeIndex = drawState.getAttribIndex(GrDrawState::kCoverage_AttribIndex);
-    } else {
-        desc->fCoverageAttributeIndex = GrDrawState::kCoverageOverrideAttribIndexValue;
-    }
-    if (desc->fAttribBindings & GrDrawState::kLocalCoords_AttribBindingsBit) {
-        desc->fLocalCoordsAttributeIndex = drawState.getAttribIndex(GrDrawState::kLocalCoords_AttribIndex);
-    }
-
-#if GR_DEBUG
-    // Verify valid vertex attribute state. These assertions should probably be done somewhere
-    // higher up the callstack
-    const GrVertexAttrib* vertexAttribs = drawState.getVertexAttribs();
-    GrAssert(desc->fPositionAttributeIndex < GrDrawState::kVertexAttribCnt);
-    GrAssert(GrGLAttribTypeToLayout(vertexAttribs[desc->fPositionAttributeIndex].fType).fCount == 2);
-    if (requiresAttributeColors) {
-        GrAssert(desc->fColorAttributeIndex < GrDrawState::kVertexAttribCnt);
-        GrAssert(GrGLAttribTypeToLayout(vertexAttribs[desc->fColorAttributeIndex].fType).fCount == 4);
-    }
-    if (requiresAttributeCoverage) {
-        GrAssert(desc->fCoverageAttributeIndex < GrDrawState::kVertexAttribCnt);
-        GrAssert(GrGLAttribTypeToLayout(vertexAttribs[desc->fCoverageAttributeIndex].fType).fCount == 4);
-    }
-    if (desc->fAttribBindings & GrDrawState::kLocalCoords_AttribBindingsBit) {
-        GrAssert(desc->fLocalCoordsAttributeIndex < GrDrawState::kVertexAttribCnt);
-        GrAssert(GrGLAttribTypeToLayout(vertexAttribs[desc->fLocalCoordsAttributeIndex].fType).fCount == 2);
-    }
-#endif
-}
-
 GrGLProgram* GrGLProgram::Create(const GrGLContext& gl,
                                  const GrGLProgramDesc& desc,
                                  const GrEffectStage* stages[]) {