Implement support for CHROMIUM_path_rendering pseudo extension

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 446 matching lines @@
 
     this->initConfigTexturableTable(ctxInfo, gli);
     this->initConfigRenderableTable(ctxInfo);
     this->initShaderPrecisionTable(ctxInfo, gli, glslCaps);
 
     this->applyOptionsOverrides(contextOptions);
     glslCaps->applyOptionsOverrides(contextOptions);
 }
 
 bool GrGLCaps::hasPathRenderingSupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
-    if (!ctxInfo.hasExtension("GL_NV_path_rendering")) {
+    bool hasChromiumPathRendering = ctxInfo.hasExtension("GL_CHROMIUM_path_rendering");
+
+    if (!(ctxInfo.hasExtension("GL_NV_path_rendering") || hasChromiumPathRendering)) {
         return false;
     }
+
     if (kGL_GrGLStandard == ctxInfo.standard()) {
         if (ctxInfo.version() < GR_GL_VER(4, 3) &&
             !ctxInfo.hasExtension("GL_ARB_program_interface_query")) {
             return false;
         }
     } else {
-        if (ctxInfo.version() < GR_GL_VER(3, 1)) {
+        if (!hasChromiumPathRendering &&
+            ctxInfo.version() < GR_GL_VER(3, 1)) {
             return false;
         }
     }
     // We only support v1.3+ of GL_NV_path_rendering which allows us to
     // set individual fragment inputs with ProgramPathFragmentInputGen. The API
     // additions are detected by checking the existence of the function.
     // We also use *Then* functions that not all drivers might have. Check
     // them for consistency.
     if (NULL == gli->fFunctions.fStencilThenCoverFillPath ||
         NULL == gli->fFunctions.fStencilThenCoverStrokePath ||
@@ skipping 710 matching lines @@
         for (int p = 0; p < kGrSLPrecisionCount; ++p) {
             glslCaps->fFloatPrecisions[kGeometry_GrShaderType][p] = 
                                                glslCaps->fFloatPrecisions[kVertex_GrShaderType][p];
         }
     }
 }