Implement support for CHROMIUM_NV_path_rendering pseudo extension

src/gpu/gl/GrGLInterface.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLExtensions.h"
@@ skipping 223 matching lines @@
 
     // these functions are part of ES2, we assume they are available
     // On the desktop we assume they are available if the extension
     // is present or GL version is high enough.
     if (kGLES_GrGLStandard == fStandard) {
         if (NULL == fFunctions.fStencilFuncSeparate ||
             NULL == fFunctions.fStencilMaskSeparate ||
             NULL == fFunctions.fStencilOpSeparate) {
             RETURN_FALSE_INTERFACE
         }
+        if (fExtensions.has("GL_CHROMIUM_path_rendering")) {
+            if (NULL == fFunctions.fMatrixLoadf ||
+                NULL == fFunctions.fMatrixLoadIdentity ||
+                NULL == fFunctions.fPathCommands ||
+                NULL == fFunctions.fPathParameteri ||
+                NULL == fFunctions.fPathParameterf ||
+                NULL == fFunctions.fGenPaths ||
+                NULL == fFunctions.fDeletePaths ||
+                NULL == fFunctions.fPathStencilFunc ||
+                NULL == fFunctions.fStencilFillPath ||
+                NULL == fFunctions.fStencilFillPathInstanced ||
+                NULL == fFunctions.fStencilStrokePath ||
+                NULL == fFunctions.fStencilStrokePathInstanced ||
+                NULL == fFunctions.fPathTexGen ||
+                NULL == fFunctions.fCoverFillPath ||
+                NULL == fFunctions.fCoverFillPathInstanced ||
+                NULL == fFunctions.fCoverStrokePath ||
+                NULL == fFunctions.fCoverStrokePathInstanced) {
+                return false;
+            }
+        }
     } else if (kGL_GrGLStandard == fStandard) {
 
         if (glVer >= GR_GL_VER(2,0)) {
             if (NULL == fFunctions.fStencilFuncSeparate ||
                 NULL == fFunctions.fStencilMaskSeparate ||
                 NULL == fFunctions.fStencilOpSeparate) {
                 RETURN_FALSE_INTERFACE
             }
         }
         if (glVer >= GR_GL_VER(3,0) && NULL == fFunctions.fBindFragDataLocation) {
@@ skipping 246 matching lines @@
             NULL == fFunctions.fMapTexSubImage2D ||
             NULL == fFunctions.fUnmapBufferSubData ||
             NULL == fFunctions.fUnmapTexSubImage2D) {
             RETURN_FALSE_INTERFACE;
         }
     }
 #endif
 
     return true;
 }