Resize synchronization for Linux.

app/gfx/gl/gl_context_linux.cc

 // Copyright (c) 2010 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.
 
 // This file implements the ViewGLContext and PbufferGLContext classes.
 
 #include "app/gfx/gl/gl_context.h"
 
 #include <GL/osmesa.h>
 
@@ skipping 29 matching lines @@
 
   // Initializes the GL context.
   bool Initialize(bool multisampled);
 
   virtual void Destroy();
   virtual bool MakeCurrent();
   virtual bool IsCurrent();
   virtual bool IsOffscreen();
   virtual bool SwapBuffers();
   virtual gfx::Size GetSize();
+  virtual void SetSize(gfx::Size size);
   virtual void* GetHandle();
   virtual void SetSwapInterval(int interval);
 
  private:
   gfx::PluginWindowHandle window_;
   GLContextHandle context_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewGLContext);
 };
 
@@ skipping 248 matching lines @@
   return true;
 }
 
 gfx::Size ViewGLContext::GetSize() {
   XWindowAttributes attributes;
   Display* display = x11_util::GetXDisplay();
   XGetWindowAttributes(display, window_, &attributes);
   return gfx::Size(attributes.width, attributes.height);
 }
 
+void ViewGLContext::SetSize(gfx::Size size) {
+  // Need to flush the GL commands in flight so that the resize operation
+  // doesn't damage the backbuffer.
+  glFinish();
+
+  GLContext::SetSize(size);
+}
+
 void* ViewGLContext::GetHandle() {
   return context_;
 }
 
 void ViewGLContext::SetSwapInterval(int interval) {
   DCHECK(IsCurrent());
   if (HasExtension("GLX_EXT_swap_control") && glXSwapIntervalEXT) {
     Display* display = x11_util::GetXDisplay();
     glXSwapIntervalEXT(display, window_, interval);
   }
@@ skipping 473 matching lines @@
     }
     case kGLImplementationMockGL:
       return new StubGLContext;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace gfx