Workaround for blacklist KHR_blend_equation_advanced on ARM GPU

src/gpu/gl/GrGLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLCaps.h"
 
@@ skipping 834 matching lines @@
     }
 }
 
 void GrGLCaps::initBlendEqationSupport(const GrGLContextInfo& ctxInfo) {
     GrGLSLCaps* glslCaps = static_cast<GrGLSLCaps*>(fShaderCaps.get());
 
     // Disabling advanced blend on various platforms with major known issues. We also block Chrome
     // for now until its own blacklists can be updated.
     if (kAdreno4xx_GrGLRenderer == ctxInfo.renderer() ||
         kIntel_GrGLDriver == ctxInfo.driver() ||
-        kChromium_GrGLDriver == ctxInfo.driver() ||
-        kARM_GrGLVendor == ctxInfo.vendor()) {
+        kChromium_GrGLDriver == ctxInfo.driver()) {
         return;
     }
 
     if (ctxInfo.hasExtension("GL_NV_blend_equation_advanced_coherent")) {
         fBlendEquationSupport = kAdvancedCoherent_BlendEquationSupport;
         glslCaps->fAdvBlendEqInteraction = GrGLSLCaps::kAutomatic_AdvBlendEqInteraction;
     } else if (ctxInfo.hasExtension("GL_KHR_blend_equation_advanced_coherent")) {
         fBlendEquationSupport = kAdvancedCoherent_BlendEquationSupport;
         glslCaps->fAdvBlendEqInteraction = GrGLSLCaps::kGeneralEnable_AdvBlendEqInteraction;
     } else if (kNVIDIA_GrGLDriver == ctxInfo.driver() &&
@@ skipping 12 matching lines @@
         return; // No advanced blend support.
     }
 
     SkASSERT(this->advancedBlendEquationSupport());
 
     if (kNVIDIA_GrGLDriver == ctxInfo.driver()) {
         // Blacklist color-dodge and color-burn on NVIDIA until the fix is released.
         fAdvBlendEqBlacklist |= (1 << kColorDodge_GrBlendEquation) |
                                 (1 << kColorBurn_GrBlendEquation);
     }
+    if (kARM_GrGLVendor == ctxInfo.vendor()) {
+        // Blacklist color-burn on ARM until the fix is released.
+        fAdvBlendEqBlacklist |= (1 << kColorBurn_GrBlendEquation);
+    }
 }
 
 namespace {
 const GrGLuint kUnknownBitCount = GrGLStencilAttachment::kUnknownBitCount;
 }
 
 void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
 
     // Build up list of legal stencil formats (though perhaps not supported on
     // the particular gpu/driver) from most preferred to least.
@@ skipping 259 matching lines @@
         for (int p = 0; p < kGrSLPrecisionCount; ++p) {
             glslCaps->fFloatPrecisions[kGeometry_GrShaderType][p] = 
                                                glslCaps->fFloatPrecisions[kVertex_GrShaderType][p];
         }
     }
 }