Add Pepper support for several GL extensions

ppapi/lib/gl/gles2/gles2.c

Index: ppapi/lib/gl/gles2/gles2.c
diff --git a/ppapi/lib/gl/gles2/gles2.c b/ppapi/lib/gl/gles2/gles2.c
index 8dba4741ab57cc7d4b631e0d6205ac53d14abe71..f0ae66ff51c9eddac702b0c965137e0487817b28 100644
--- a/ppapi/lib/gl/gles2/gles2.c
+++ b/ppapi/lib/gl/gles2/gles2.c
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -753,3 +753,95 @@ void GL_APIENTRY glViewport(GLint x, GLint y, GLsizei width, GLsizei height) {
       glGetCurrentContextPPAPI(), x, y, width, height);
 }
 
+void GL_APIENTRY glBlitFramebufferEXT(
+    GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0,
+    GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) {
+  const struct PPB_OpenGLES2FramebufferBlit_Dev* ext =
+      glGetFramebufferBlitInterfacePPAPI();
+  if (ext)
+    ext->BlitFramebufferEXT(
+        glGetCurrentContextPPAPI(), srcX0, srcY0, srcX1, srcY1, dstX0, dstY0,
+        dstX1, dstY1, mask, filter);
+}
+
+void GL_APIENTRY glRenderbufferStorageMultisampleEXT(
+    GLenum target, GLsizei samples, GLenum internalformat, GLsizei width,
+    GLsizei height) {
+  const struct PPB_OpenGLES2FramebufferMultisample_Dev* ext =
+      glGetFramebufferMultisampleInterfacePPAPI();
+  if (ext)
+    ext->RenderbufferStorageMultisampleEXT(
+        glGetCurrentContextPPAPI(), target, samples, internalformat, width,
+        height);
+}
+
+GLboolean GL_APIENTRY glEnableFeatureCHROMIUM(const char* feature) {
+  const struct PPB_OpenGLES2ChromiumEnableFeature_Dev* ext =
+      glGetChromiumEnableFeatureInterfacePPAPI();
+  if (ext)
+    return ext->EnableFeatureCHROMIUM(glGetCurrentContextPPAPI(), feature);
+  return 0;
+}
+
+void* GL_APIENTRY glMapBufferSubDataCHROMIUM(
+    GLuint target, GLintptr offset, GLsizeiptr size, GLenum access) {
+  const struct PPB_OpenGLES2ChromiumMapSub_Dev* ext =
+      glGetChromiumMapSubInterfacePPAPI();
+  if (ext)
+    return ext->MapBufferSubDataCHROMIUM(
+        glGetCurrentContextPPAPI(), target, offset, size, access);
+  return 0;
+}
+
+void GL_APIENTRY glUnmapBufferSubDataCHROMIUM(const void* mem) {
+  const struct PPB_OpenGLES2ChromiumMapSub_Dev* ext =
+      glGetChromiumMapSubInterfacePPAPI();
+  if (ext)
+    ext->UnmapBufferSubDataCHROMIUM(glGetCurrentContextPPAPI(), mem);
+}
+
+void* GL_APIENTRY glMapTexSubImage2DCHROMIUM(
+    GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+    GLsizei height, GLenum format, GLenum type, GLenum access) {
+  const struct PPB_OpenGLES2ChromiumMapSub_Dev* ext =
+      glGetChromiumMapSubInterfacePPAPI();
+  if (ext)
+    return ext->MapTexSubImage2DCHROMIUM(
+        glGetCurrentContextPPAPI(), target, level, xoffset, yoffset, width,
+        height, format, type, access);
+  return 0;
+}
+
+void GL_APIENTRY glUnmapTexSubImage2DCHROMIUM(const void* mem) {
+  const struct PPB_OpenGLES2ChromiumMapSub_Dev* ext =
+      glGetChromiumMapSubInterfacePPAPI();
+  if (ext)
+    ext->UnmapTexSubImage2DCHROMIUM(glGetCurrentContextPPAPI(), mem);
+}
+
+void GL_APIENTRY glDrawArraysInstancedANGLE(
+    GLenum mode, GLint first, GLsizei count, GLsizei primcount) {
+  const struct PPB_OpenGLES2InstancedArrays_Dev* ext =
+      glGetInstancedArraysInterfacePPAPI();
+  if (ext)
+    ext->DrawArraysInstancedANGLE(
+        glGetCurrentContextPPAPI(), mode, first, count, primcount);
+}
+
+void GL_APIENTRY glDrawElementsInstancedANGLE(
+    GLenum mode, GLsizei count, GLenum type, const void* indices,
+    GLsizei primcount) {
+  const struct PPB_OpenGLES2InstancedArrays_Dev* ext =
+      glGetInstancedArraysInterfacePPAPI();
+  if (ext)
+    ext->DrawElementsInstancedANGLE(
+        glGetCurrentContextPPAPI(), mode, count, type, indices, primcount);
+}
+
+void GL_APIENTRY glVertexAttribDivisorANGLE(GLuint index, GLuint divisor) {
+  const struct PPB_OpenGLES2InstancedArrays_Dev* ext =
+      glGetInstancedArraysInterfacePPAPI();
+  if (ext)
+    ext->VertexAttribDivisorANGLE(glGetCurrentContextPPAPI(), index, divisor);
+}
+