Deleted code associated with --enable-gpu-rendering and...

chrome/gpu/gpu_backing_store_glx_context.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 "chrome/gpu/gpu_backing_store_glx_context.h"
-
-#include "app/gfx/gl/gl_bindings.h"
-#include "app/x11_util.h"
-#include "base/scoped_ptr.h"
-#include "chrome/gpu/gpu_thread.h"
-
-// Must be last.
-#include <X11/Xutil.h>
-
-GpuBackingStoreGLXContext::GpuBackingStoreGLXContext(GpuThread* gpu_thread)
-    : gpu_thread_(gpu_thread),
-      tried_to_init_(false),
-      context_(NULL),
-      previous_window_id_(0),
-      frame_buffer_for_scrolling_(0),
-      is_frame_buffer_bound_(false),
-      temp_scroll_texture_id_(0) {
-}
-
-GpuBackingStoreGLXContext::~GpuBackingStoreGLXContext() {
-  if (temp_scroll_texture_id_) {
-    glDeleteTextures(1, &temp_scroll_texture_id_);
-    temp_scroll_texture_id_ = 0;
-  }
-
-  if (frame_buffer_for_scrolling_)
-    glDeleteFramebuffersEXT(1, &frame_buffer_for_scrolling_);
-
-  if (context_)
-    glXDestroyContext(gpu_thread_->display(), context_);
-}
-
-GLXContext GpuBackingStoreGLXContext::BindContext(XID window_id) {
-  DCHECK(!is_frame_buffer_bound_);
-
-  if (tried_to_init_) {
-    if (!context_)
-      return NULL;
-    if (!previous_window_id_ || previous_window_id_ != window_id) {
-      bool success = glXMakeCurrent(gpu_thread_->display(), window_id,
-                                    context_);
-      DCHECK(success);
-    }
-    previous_window_id_ = window_id;
-    return context_;
-  }
-  tried_to_init_ = true;
-
-  int attrib_list[] = { GLX_RGBA, GLX_DOUBLEBUFFER, 0 };
-  scoped_ptr_malloc<XVisualInfo, ScopedPtrXFree> visual_info(
-      glXChooseVisual(gpu_thread_->display(), 0, attrib_list));
-  if (!visual_info.get())
-    return NULL;
-
-  context_ = glXCreateContext(gpu_thread_->display(), visual_info.get(),
-                              NULL, True);
-  bool success = glXMakeCurrent(gpu_thread_->display(), window_id, context_);
-  DCHECK(success);
-  return context_;
-}
-
-bool GpuBackingStoreGLXContext::BindTextureForScrolling(
-    XID window_id,
-    const gfx::Size& size) {
-  DCHECK(!is_frame_buffer_bound_);
-  BindContext(window_id);
-
-  // Create a new destination texture if the old one isn't properly sized.
-  // This means we try to re-use old ones without re-creating all the texture
-  // to save work in the common case of scrolling a window repeatedly that
-  // doesn't change size.
-  if (temp_scroll_texture_id_ == 0 ||
-      size != temp_scroll_texture_size_) {
-    if (!temp_scroll_texture_id_) {
-      // There may be no temporary one created yet.
-      glGenTextures(1, &temp_scroll_texture_id_);
-    }
-
-    // Create a new texture in the context with random garbage in it large
-    // enough to fit the required size.
-    glBindTexture(GL_TEXTURE_2D, temp_scroll_texture_id_);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size.width(), size.height(),
-                 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
-    glBindTexture(GL_TEXTURE_2D, 0);
-  }
-
-  if (!frame_buffer_for_scrolling_)
-    glGenFramebuffersEXT(1, &frame_buffer_for_scrolling_);
-  glBindFramebufferEXT(GL_FRAMEBUFFER, frame_buffer_for_scrolling_);
-  is_frame_buffer_bound_ = true;
-
-  // Release our color attachment.
-  glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
-                            temp_scroll_texture_id_, 0);
-
-  DCHECK(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) ==
-         GL_FRAMEBUFFER_COMPLETE_EXT);
-  return true;
-}
-
-unsigned int GpuBackingStoreGLXContext::SwapTextureForScrolling(
-    unsigned int old_texture,
-    const gfx::Size& old_size) {
-  // Unbind the framebuffer, which we expect to be bound.
-  DCHECK(is_frame_buffer_bound_);
-  glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
-  is_frame_buffer_bound_ = false;
-
-  DCHECK(temp_scroll_texture_id_);
-  unsigned int new_texture = temp_scroll_texture_id_;
-
-  temp_scroll_texture_id_ = old_texture;
-  temp_scroll_texture_size_ = old_size;
-
-  return new_texture;
-}