Add query for whether or not we have compressedTexSubImage

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"
 #include "GrGLContext.h"
@@ skipping 484 matching lines @@
         SkASSERT(fConfigTextureSupport[kBGRA_8888_GrPixelConfig] ||
                  kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
     }
 
     // Compressed texture support
 
     // glCompressedTexImage2D is available on all OpenGL ES devices...
     // however, it is only available on standard OpenGL after version 1.3
     bool hasCompressTex2D = (kGL_GrGLStandard != standard || version >= GR_GL_VER(1, 3));
 
+    fCompressedTexSubImageSupport =
+        hasCompressTex2D && (NULL != gli->fFunctions.fCompressedTexSubImage2D);
+
     // Check for ETC1
     bool hasETC1 = false;
 
     // First check version for support
     if (kGL_GrGLStandard == standard) {
         hasETC1 = hasCompressTex2D &&
             (version >= GR_GL_VER(4, 3) ||
              ctxInfo.hasExtension("GL_ARB_ES3_compatibility"));
     } else {
         hasETC1 = hasCompressTex2D &&
@@ skipping 318 matching lines @@
     r.appendf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
     r.appendf("Fragment coord conventions support: %s\n",
              (fFragCoordsConventionSupport ? "YES": "NO"));
     r.appendf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
     r.appendf("Use non-VBO for dynamic data: %s\n",
              (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
     r.appendf("Full screen clear is free: %s\n", (fFullClearIsFree ? "YES" : "NO"));
     r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
     return r;
 }