Add flow control between renderer and GPU processes, and, on Mac OS X,...

app/surface/accelerated_surface_mac.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.
 
 #include "app/surface/accelerated_surface_mac.h"
 
 #include "app/gfx/gl/gl_bindings.h"
 #include "app/gfx/gl/gl_implementation.h"
 #include "app/surface/io_surface_support_mac.h"
 #include "base/logging.h"
@@ skipping 106 matching lines @@
 }
 
 void AcceleratedSurface::AllocateRenderBuffers(GLenum target,
                                                const gfx::Size& size) {
   if (!texture_) {
     // Generate the texture object.
     glGenTextures(1, &texture_);
     glBindTexture(target, texture_);
     glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     // Generate and bind the framebuffer object.
     glGenFramebuffersEXT(1, &fbo_);
     glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_);
     // Generate (but don't bind) the depth buffer -- we don't need
     // this bound in order to do offscreen rendering.
     glGenRenderbuffersEXT(1, &depth_stencil_renderbuffer_);
   }
 
   // Reallocate the depth buffer.
   glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, depth_stencil_renderbuffer_);
@@ skipping 76 matching lines @@
   // Mac OS X and is required for IOSurface interoperability.
   GLenum target = GL_TEXTURE_RECTANGLE_ARB;
   if (allocate_fbo_) {
     AllocateRenderBuffers(target, size);
   } else if (!texture_) {
     // Generate the texture object.
     glGenTextures(1, &texture_);
     glBindTexture(target, texture_);
     glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   }
 
   // Allocate a new IOSurface, which is the GPU resource that can be
   // shared across processes.
   base::mac::ScopedCFTypeRef<CFMutableDictionaryRef> properties;
   properties.reset(CFDictionaryCreateMutable(kCFAllocatorDefault,
                                              0,
                                              &kCFTypeDictionaryKeyCallBacks,
                                              &kCFTypeDictionaryValueCallBacks));
   AddIntegerValue(properties,
@@ skipping 94 matching lines @@
   }
   return transport_dib_->handle();
 }
 
 void AcceleratedSurface::SetTransportDIBAllocAndFree(
     Callback2<size_t, TransportDIB::Handle*>::Type* allocator,
     Callback1<TransportDIB::Id>::Type* deallocator) {
   dib_alloc_callback_.reset(allocator);
   dib_free_callback_.reset(deallocator);
 }