Support GLSL es 3.00

src/gpu/gl/builders/GrGLFragmentShaderBuilder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLFragmentShaderBuilder.h"
 #include "GrGLShaderStringBuilder.h"
 #include "GrGLProgramBuilder.h"
@@ skipping 24 matching lines @@
                 break;
             case GrGLShaderVar::kDefault_Precision:
                 SkFAIL("Default precision now allowed.");
             default:
                 SkFAIL("Unknown precision value.");
         }
     }
 }
 
 GrGLFragmentShaderBuilder::DstReadKey
-GrGLFragmentShaderBuilder::KeyForDstRead(const GrTexture* dstCopy,
-                                                                 const GrGLCaps& caps) {
+GrGLFragmentShaderBuilder::KeyForDstRead(const GrTexture* dstCopy, const GrGLCaps& caps) {
     uint32_t key = kYesDstRead_DstReadKeyBit;
     if (caps.fbFetchSupport()) {
         return key;
     }
     SkASSERT(dstCopy);
     if (!caps.textureSwizzleSupport() && GrPixelConfigIsAlphaOnly(dstCopy->config())) {
         // The fact that the config is alpha-only must be considered when generating code.
         key |= kUseAlphaConfig_DstReadKeyBit;
     }
     if (kTopLeft_GrSurfaceOrigin == dstCopy->origin()) {
         key |= kTopLeftOrigin_DstReadKeyBit;
     }
     SkASSERT(static_cast<DstReadKey>(key) == key);
     return static_cast<DstReadKey>(key);
 }
 
 GrGLFragmentShaderBuilder::FragPosKey
-GrGLFragmentShaderBuilder::KeyForFragmentPosition(const GrRenderTarget* dst,
-                                                                          const GrGLCaps&) {
+GrGLFragmentShaderBuilder::KeyForFragmentPosition(const GrRenderTarget* dst, const GrGLCaps&) {
     if (kTopLeft_GrSurfaceOrigin == dst->origin()) {
         return kTopLeftFragPosRead_FragPosKey;
     } else {
         return kBottomLeftFragPosRead_FragPosKey;
     }
 }
 
 GrGLFragmentShaderBuilder::GrGLFragmentShaderBuilder(GrGLProgramBuilder* program,
                                                      const GrGLProgramDesc& desc)
     : INHERITED(program)
     , fHasCustomColorOutput(false)
     , fHasSecondaryOutput(false)
     , fSetupFragPosition(false)
     , fTopLeftFragPosRead(kTopLeftFragPosRead_FragPosKey == desc.getHeader().fFragPosKey)
     , fHasReadDstColor(false)
     , fHasReadFragmentPosition(false) {
 }
 
 bool GrGLFragmentShaderBuilder::enableFeature(GLSLFeature feature) {
     switch (feature) {
         case kStandardDerivatives_GLSLFeature: {
             GrGpuGL* gpu = fProgramBuilder->gpu();
             if (!gpu->glCaps().shaderDerivativeSupport()) {
                 return false;
             }
-            if (kGLES_GrGLStandard == gpu->glStandard()) {
+            if (kGLES_GrGLStandard == gpu->glStandard() &&
+                k110_GrGLSLGeneration == gpu->glslGeneration()) {
                 this->addFeature(1 << kStandardDerivatives_GLSLFeature,
                                  "GL_OES_standard_derivatives");
             }
             return true;
         }
         default:
             SkFAIL("Unexpected GLSLFeature requested.");
             return false;
     }
 }
@@ skipping 217 matching lines @@
     if (!fragShaderId) {
         return false;
     }
 
     *shaderIds->append() = fragShaderId;
 
     return true;
 }
 
 void GrGLFragmentShaderBuilder::bindFragmentShaderLocations(GrGLuint programID) {
-    if (fHasCustomColorOutput) {
+    // ES 3.00 requires custom color output but doesn't support bindFragDataLocation
+    if (fHasCustomColorOutput &&
+        kGLES_GrGLStandard != fProgramBuilder->gpu()->ctxInfo().standard()) {
         GL_CALL(BindFragDataLocation(programID, 0, declared_color_output_name()));
     }
     if (fHasSecondaryOutput) {
         GL_CALL(BindFragDataLocationIndexed(programID, 0, 1, dual_source_output_name()));
     }
 }
 
 void GrGLFragmentShaderBuilder::addVarying(GrSLType type,
                const char* name,
                const char** fsInName,
                GrGLShaderVar::Precision fsPrecision) {
     fInputs.push_back().set(type, GrGLShaderVar::kVaryingIn_TypeModifier, name, fsPrecision);
     if (fsInName) {
         *fsInName = name;
     }
 }