Add support for glMapBufferRange. Use glMapBufferRange and glMapBufferSubData.

src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp

 // Modified from chromium/src/webkit/glue/gl_bindings_skia_cmd_buffer.cc
 
 // Copyright (c) 2011 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 "gl/GrGLInterface.h"
 #include "gl/GrGLAssembleInterface.h"
 #include "gl/GrGLExtensions.h"
 #include "gl/GrGLUtil.h"
@@ skipping 57 matching lines @@
     functions->fGenTextures = glGenTextures;
     functions->fGenVertexArrays = glGenVertexArraysOES;
     functions->fGetBufferParameteriv = glGetBufferParameteriv;
     functions->fGetError = glGetError;
     functions->fGetIntegerv = glGetIntegerv;
     functions->fGetProgramInfoLog = glGetProgramInfoLog;
     functions->fGetProgramiv = glGetProgramiv;
     functions->fGetShaderInfoLog = glGetShaderInfoLog;
     functions->fGetShaderiv = glGetShaderiv;
     functions->fGetString = glGetString;
-#if GL_ES_VERSION_30
+#if GL_ES_VERSION_3_0
     functions->fGetStringi = glGetStringi;
 #else
     functions->fGetStringi = (GrGLGetStringiProc) eglGetProcAddress("glGetStringi");
 #endif
     functions->fGetUniformLocation = glGetUniformLocation;
     functions->fLineWidth = glLineWidth;
     functions->fLinkProgram = glLinkProgram;
     functions->fPixelStorei = glPixelStorei;
     functions->fReadPixels = glReadPixels;
     functions->fScissor = glScissor;
@@ skipping 87 matching lines @@
         functions->fFramebufferTexture2DMultisample = (GrGLFramebufferTexture2DMultisampleProc) eglGetProcAddress("glFramebufferTexture2DMultisampleIMG");
         functions->fRenderbufferStorageMultisampleES2EXT = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisampleIMG");
 #endif
     }
 
     functions->fGenFramebuffers = glGenFramebuffers;
     functions->fGenRenderbuffers = glGenRenderbuffers;
     functions->fGetFramebufferAttachmentParameteriv = glGetFramebufferAttachmentParameteriv;
     functions->fGetRenderbufferParameteriv = glGetRenderbufferParameteriv;
     functions->fRenderbufferStorage = glRenderbufferStorage;
+
 #if GL_OES_mapbuffer
     functions->fMapBuffer = glMapBufferOES;
     functions->fUnmapBuffer = glUnmapBufferOES;
 #else
     functions->fMapBuffer = (GrGLMapBufferProc) eglGetProcAddress("glMapBufferOES");
     functions->fUnmapBuffer = (GrGLUnmapBufferProc) eglGetProcAddress("glUnmapBufferOES");
+
+#endif
+
+#if GL_ES_VERSION_3_0 || GL_EXT_map_buffer_range
+    functions->fMapBufferRange = glMapBufferRange;
+    functions->fFlushMappedBufferRange = glFlushMappedBufferRange;
+#else
+    if (version >= GR_GL_VER(3,0) || extensions->has("GL_EXT_map_buffer_range")) {
+        functions->fMapBufferRange = (GrGLMapBufferRangeProc) eglGetProcAddress("glMapBufferRange");
+        functions->fFlushMappedBufferRange = (GrGLFlushMappedBufferRangeProc) eglGetProcAddress("glFlushMappedBufferRange");
+    }
 #endif
 
     if (extensions->has("GL_EXT_debug_marker")) {
         functions->fInsertEventMarker = (GrGLInsertEventMarkerProc) eglGetProcAddress("glInsertEventMarker");
         functions->fPushGroupMarker = (GrGLInsertEventMarkerProc) eglGetProcAddress("glPushGroupMarker");
         functions->fPopGroupMarker = (GrGLPopGroupMarkerProc) eglGetProcAddress("glPopGroupMarker");
         // The below check is here because a device has been found that has the extension string but
         // returns NULL from the eglGetProcAddress for the functions
         if (NULL == functions->fInsertEventMarker ||
             NULL == functions->fPushGroupMarker ||
@@ skipping 44 matching lines @@
             interface->fExtensions.swap(&extensions);
         }
 
         return interface;
     } else if (kGL_GrGLStandard == standard) {
         return create_desktop_interface();
     }
 
     return NULL;
 }