Expose gles2 bgra extensions when GL_EXT_bgra is supported

webkit/gpu/webgraphicscontext3d_in_process_impl.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 "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <string>
 
 #include "base/logging.h"
+#include "base/string_split.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "ui/gfx/gl/gl_bindings.h"
 #include "ui/gfx/gl/gl_bindings_skia_in_process.h"
 #include "ui/gfx/gl/gl_context.h"
 #include "ui/gfx/gl/gl_implementation.h"
 #include "ui/gfx/gl/gl_surface.h"
 
@@ skipping 1217 matching lines @@
   WebString res = WebString::fromUTF8(log.get(), returned_log_length);
   return res;
 }
 
 WebString WebGraphicsContext3DInProcessImpl::getString(WGC3Denum name) {
   makeContextCurrent();
   std::string result(reinterpret_cast<const char*>(glGetString(name)));
   if (name == GL_EXTENSIONS) {
     // GL_CHROMIUM_copy_texture_to_parent_texture requires the
     // desktopGL-only function glGetTexLevelParameteriv (GLES2
     // doesn't support it).

[Ken Russell (switch to Gerrit), 2011/11/04 01:18:58]

Could you move this comment next to the addition of the
GL_CHROMIUM_copy_texture_to_parent_texture string?

[piman, 2011/11/04 01:36:30]

Done.

-    if (!is_gles2_)
+    if (!is_gles2_) {
+      std::vector<std::string> split;
+      base::SplitString(result, ' ', &split);
+      if (std::find(split.begin(), split.end(), "GL_EXT_bgra") != split.end()) {
+        // If we support GL_EXT_bgra, pretend we support a couple of GLES2
+        // extension that are a subset of it.
+        result += " GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra";
+      }
       result += " GL_CHROMIUM_copy_texture_to_parent_texture";
+    }
   }
   return WebString::fromUTF8(result.c_str());
 }
 
 DELEGATE_TO_GL_3(getTexParameterfv, GetTexParameterfv,
                  WGC3Denum, WGC3Denum, WGC3Dfloat*)
 
 DELEGATE_TO_GL_3(getTexParameteriv, GetTexParameteriv,
                  WGC3Denum, WGC3Denum, WGC3Dint*)
 
@@ skipping 412 matching lines @@
   if (length > 1) {
     entry->translated_source.reset(new char[length]);
     ShGetObjectCode(compiler, entry->translated_source.get());
   }
   entry->is_valid = true;
   return true;
 }
 
 }  // namespace gpu
 }  // namespace webkit