Change GrGLProgramDesc header to have DoPathRendering flag instead of RequiresVertexShader

src/gpu/gl/GrGLProgramDesc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrGLProgramDesc.h"
 #include "GrBackendEffectFactory.h"
@@ skipping 145 matching lines @@
     if (!gen_effect_meta_key(stage, useExplicitLocalCoords, caps, b)) {
         return false;
     }
     return true;
 }
 
 bool GrGLProgramDesc::Build(const GrOptDrawState& optState,
                             GrGpu::DrawType drawType,
                             GrBlendCoeff srcCoeff,
                             GrBlendCoeff dstCoeff,
-                            const GrGpuGL* gpu,
+                            GrGpuGL* gpu,
                             const GrDeviceCoordTexture* dstCopy,
                             const GrEffectStage** geometryProcessor,
                             SkTArray<const GrEffectStage*, true>* colorStages,
                             SkTArray<const GrEffectStage*, true>* coverageStages,
                             GrGLProgramDesc* desc) {
     colorStages->reset();
     coverageStages->reset();
 
     bool inputColorIsUsed = optState.inputColorIsUsed();
     bool inputCoverageIsUsed = optState.inputColorIsUsed();
@@ skipping 76 matching lines @@
     }
 
     if (!effectKeySuccess) {
         desc->fKey.reset();
         return false;
     }
 
     // Because header is a pointer into the dynamic array, we can't push any new data into the key
     // below here.
 
-    // We will only require a vertex shader if we have more than just the position VA attrib.
-    // If we have a geom processor we must us a vertex shader and we should not have a geometry
-    // processor if we are doing path rendering.
-    SkASSERT(!GrGpu::IsPathRenderingDrawType(drawType) || !optState.requiresVertexShader());
-    header->fRequiresVertexShader = optState.requiresVertexShader() ||
-                                    !GrGpu::IsPathRenderingDrawType(drawType);
+    header->fUseFragShaderOnly = gpu->caps()->pathRenderingSupport() &&
+        GrGpu::IsPathRenderingDrawType(drawType) &&
+        gpu->glPathRendering()->texturingMode() == GrGLPathRendering::FixedFunction_TexturingMode;
+    SkASSERT(!header->fUseFragShaderOnly || !optState.hasGeometryProcessor());
+
     header->fEmitsPointSize = GrGpu::kDrawPoints_DrawType == drawType;
 
     // 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
     header->fExperimentalGS = gpu->caps().geometryShaderSupport();
 #else
     header->fExperimentalGS = false;
 #endif
 #endif
-    bool defaultToUniformInputs = GR_GL_NO_CONSTANT_ATTRIBUTES || gpu->caps()->pathRenderingSupport();
+    bool defaultToUniformInputs = GR_GL_NO_CONSTANT_ATTRIBUTES || header->fUseFragShaderOnly;
 
     if (!inputColorIsUsed) {
         header->fColorInput = kAllOnes_ColorInput;
     } else if (defaultToUniformInputs && !requiresColorAttrib) {
         header->fColorInput = kUniform_ColorInput;
     } else {
         header->fColorInput = kAttribute_ColorInput;
-        header->fRequiresVertexShader = true;
+        header->fUseFragShaderOnly = false;
     }
 
     bool covIsSolidWhite = !requiresCoverageAttrib && 0xffffffff == optState.getCoverageColor();
 
     if (covIsSolidWhite || !inputCoverageIsUsed) {
         header->fCoverageInput = kAllOnes_ColorInput;
     } else if (defaultToUniformInputs && !requiresCoverageAttrib) {
         header->fCoverageInput = kUniform_ColorInput;
     } else {
         header->fCoverageInput = kAttribute_ColorInput;
-        header->fRequiresVertexShader = true;
+        header->fUseFragShaderOnly = false;
     }
 
     if (optState.readsDst()) {
         SkASSERT(dstCopy || gpu->caps()->dstReadInShaderSupport());
         const GrTexture* dstCopyTexture = NULL;
         if (dstCopy) {
             dstCopyTexture = dstCopy->texture();
         }
         header->fDstReadKey = GrGLFragmentShaderBuilder::KeyForDstRead(dstCopyTexture,
                 gpu->glCaps());
@@ skipping 97 matching lines @@
     *checksum = 0;
     *checksum = SkChecksum::Compute(reinterpret_cast<uint32_t*>(fKey.begin()), keyLength);
 }
 
 GrGLProgramDesc& GrGLProgramDesc::operator= (const GrGLProgramDesc& other) {
     size_t keyLength = other.keyLength();
     fKey.reset(keyLength);
     memcpy(fKey.begin(), other.fKey.begin(), keyLength);
     return *this;
 }