Add GL_CHROMIUM_map_sub functions to GrGLInterface and bit to GrGLCaps.

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 30 matching lines @@
     fTextureRedSupport = false;
     fImagingSupport = false;
     fTwoFormatLimit = false;
     fFragCoordsConventionSupport = false;
     fVertexArrayObjectSupport = false;
     fUseNonVBOVertexAndIndexDynamicData = false;
     fIsCoreProfile = false;
     fFixedFunctionSupport = false;
     fFullClearIsFree = false;
     fDropsTileOnZeroDivide = false;
+    fMapSubSupport = false;
 }
 
 GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTargetCaps() {
     *this = caps;
 }
 
-GrGLCaps& GrGLCaps::operator = (const GrGLCaps& caps) {
+GrGLCaps& GrGLCaps::operator= (const GrGLCaps& caps) {
     INHERITED::operator=(caps);
     fVerifiedColorConfigs = caps.fVerifiedColorConfigs;
     fStencilFormats = caps.fStencilFormats;
     fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs;
     fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors;
     fMaxVertexAttributes = caps.fMaxVertexAttributes;
     fMaxFragmentTextureUnits = caps.fMaxFragmentTextureUnits;
     fMaxFixedFunctionTextureCoords = caps.fMaxFixedFunctionTextureCoords;
     fMSFBOType = caps.fMSFBOType;
     fFBFetchType = caps.fFBFetchType;
@@ skipping 11 matching lines @@
     fTextureRedSupport = caps.fTextureRedSupport;
     fImagingSupport = caps.fImagingSupport;
     fTwoFormatLimit = caps.fTwoFormatLimit;
     fFragCoordsConventionSupport = caps.fFragCoordsConventionSupport;
     fVertexArrayObjectSupport = caps.fVertexArrayObjectSupport;
     fUseNonVBOVertexAndIndexDynamicData = caps.fUseNonVBOVertexAndIndexDynamicData;
     fIsCoreProfile = caps.fIsCoreProfile;
     fFixedFunctionSupport = caps.fFixedFunctionSupport;
     fFullClearIsFree = caps.fFullClearIsFree;
     fDropsTileOnZeroDivide = caps.fDropsTileOnZeroDivide;
+    fMapSubSupport = caps.fMapSubSupport;
 
     return *this;
 }
 
 void GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
 
     this->reset();
     if (!ctxInfo.isInitialized()) {
         return;
     }
@@ skipping 187 matching lines @@
                                   ctxInfo.hasExtension("GL_EXT_stencil_wrap");
     } else {
         // ES 2 has two sided stencil and stencil wrap
         fTwoSidedStencilSupport = true;
         fStencilWrapOpsSupport = true;
     }
 
     if (kGL_GrGLStandard == standard) {
         fBufferLockSupport = true; // we require VBO support and the desktop VBO extension includes
                                    // glMapBuffer.
+        fMapSubSupport = false;
     } else {
         fBufferLockSupport = ctxInfo.hasExtension("GL_OES_mapbuffer");
+        fMapSubSupport = ctxInfo.hasExtension("GL_CHROMIUM_map_sub");
     }
 
     if (kGL_GrGLStandard == standard) {
         SkASSERT(ctxInfo.version() >= GR_GL_VER(2,0) ||
                  ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two"));
         fNPOTTextureTileSupport = true;
         fMipMapSupport = true;
     } else {
         // Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
         // ES3 has no limitations.
@@ skipping 371 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;
 }