gpu: Add disable_blend_equation_advanced workaround for Adreno 4xx.

gpu/command_buffer/service/feature_info.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/feature_info.h"
 
 #include <set>
 
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 955 matching lines @@
     // DiscardFramebufferEXT is automatically bound to InvalidateFramebuffer.
     AddExtensionString("GL_EXT_discard_framebuffer");
     feature_flags_.ext_discard_framebuffer = true;
   }
 
   if (ui_gl_fence_works) {
     AddExtensionString("GL_CHROMIUM_sync_query");
     feature_flags_.chromium_sync_query = true;
   }
 
-  bool blend_equation_advanced_coherent =
-    extensions.Contains("GL_NV_blend_equation_advanced_coherent") ||
-    extensions.Contains("GL_KHR_blend_equation_advanced_coherent");
+  if (!workarounds_.disable_blend_equation_advanced) {
+    bool blend_equation_advanced_coherent =
+        extensions.Contains("GL_NV_blend_equation_advanced_coherent") ||
+        extensions.Contains("GL_KHR_blend_equation_advanced_coherent");
 
-  if (blend_equation_advanced_coherent ||
-      extensions.Contains("GL_NV_blend_equation_advanced") ||
-      extensions.Contains("GL_KHR_blend_equation_advanced")) {
-    const GLenum equations[] = {GL_MULTIPLY_KHR,
-                                GL_SCREEN_KHR,
-                                GL_OVERLAY_KHR,
-                                GL_DARKEN_KHR,
-                                GL_LIGHTEN_KHR,
-                                GL_COLORDODGE_KHR,
-                                GL_COLORBURN_KHR,
-                                GL_HARDLIGHT_KHR,
-                                GL_SOFTLIGHT_KHR,
-                                GL_DIFFERENCE_KHR,
-                                GL_EXCLUSION_KHR,
-                                GL_HSL_HUE_KHR,
-                                GL_HSL_SATURATION_KHR,
-                                GL_HSL_COLOR_KHR,
-                                GL_HSL_LUMINOSITY_KHR};
+    if (blend_equation_advanced_coherent ||
+        extensions.Contains("GL_NV_blend_equation_advanced") ||
+        extensions.Contains("GL_KHR_blend_equation_advanced")) {
+      const GLenum equations[] = {GL_MULTIPLY_KHR,
+                                  GL_SCREEN_KHR,
+                                  GL_OVERLAY_KHR,
+                                  GL_DARKEN_KHR,
+                                  GL_LIGHTEN_KHR,
+                                  GL_COLORDODGE_KHR,
+                                  GL_COLORBURN_KHR,
+                                  GL_HARDLIGHT_KHR,
+                                  GL_SOFTLIGHT_KHR,
+                                  GL_DIFFERENCE_KHR,
+                                  GL_EXCLUSION_KHR,
+                                  GL_HSL_HUE_KHR,
+                                  GL_HSL_SATURATION_KHR,
+                                  GL_HSL_COLOR_KHR,
+                                  GL_HSL_LUMINOSITY_KHR};
 
-    for (GLenum equation : equations)
-      validators_.equation.AddValue(equation);
-    if (blend_equation_advanced_coherent)
-      AddExtensionString("GL_KHR_blend_equation_advanced_coherent");
+      for (GLenum equation : equations)
+        validators_.equation.AddValue(equation);
+      if (blend_equation_advanced_coherent)
+        AddExtensionString("GL_KHR_blend_equation_advanced_coherent");
 
-    AddExtensionString("GL_KHR_blend_equation_advanced");
-    feature_flags_.blend_equation_advanced = true;
-    feature_flags_.blend_equation_advanced_coherent =
-      blend_equation_advanced_coherent;
+      AddExtensionString("GL_KHR_blend_equation_advanced");
+      feature_flags_.blend_equation_advanced = true;
+      feature_flags_.blend_equation_advanced_coherent =
+          blend_equation_advanced_coherent;
+    }
   }
 
   if (extensions.Contains("GL_NV_path_rendering")) {
     if (extensions.Contains("GL_EXT_direct_state_access") ||
         gl_version_info_->is_es3) {
       AddExtensionString("GL_CHROMIUM_path_rendering");
       feature_flags_.chromium_path_rendering = true;
       validators_.g_l_state.AddValue(GL_PATH_MODELVIEW_MATRIX_CHROMIUM);
       validators_.g_l_state.AddValue(GL_PATH_PROJECTION_MATRIX_CHROMIUM);
     }
@@ skipping 118 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu