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diff --git a/o3d/command_buffer/service/big_test_main.cc b/o3d/command_buffer/service/big_test_main.cc
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+++ b/o3d/command_buffer/service/big_test_main.cc
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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+// This file contains the entry to the big test program, for linux.
+
+#include "command_buffer/service/cross/big_test_helpers.h"
+#include "command_buffer/service/cross/gl/gapi_gl.h"
+#include "command_buffer/service/linux/x_utils.h"
+
+namespace command_buffer {
+
+String *g_program_path = NULL;
+GAPIInterface *g_gapi = NULL;
+
+bool ProcessSystemMessages() {
+  return true;
+}
+
+}  // namespace command_buffer
+
+using o3d::String;
+using o3d::command_buffer::g_program_path;
+using o3d::command_buffer::g_gapi;
+using o3d::command_buffer::GAPIGL;
+using o3d::command_buffer::XWindowWrapper;
+
+
+// Creates a GL-compatible window of specified dimensions.
+Window CreateWindow(Display *display, unsigned int width, unsigned int height) {
+  int attribs[] = {
+    GLX_RGBA,
+    GLX_DOUBLEBUFFER,
+    GLX_RED_SIZE, 1,
+    GLX_GREEN_SIZE, 1,
+    GLX_BLUE_SIZE, 1,
+    None
+  };
+  XVisualInfo *visualInfo = glXChooseVisual(display,
+                                            DefaultScreen(display),
+                                            attribs);
+  Window root_window = RootWindow(display, visualInfo->screen);
+  Colormap colorMap = XCreateColormap(display, root_window, visualInfo->visual,
+                                      AllocNone);
+
+  XSetWindowAttributes windowAttributes;
+  windowAttributes.colormap = colorMap;
+  windowAttributes.border_pixel = 0;
+  windowAttributes.event_mask = StructureNotifyMask;
+  Window window = XCreateWindow(display, root_window,
+                                0, 0, width, height, 0, visualInfo->depth,
+                                InputOutput, visualInfo->visual,
+                                CWBorderPixel|CWColormap|CWEventMask,
+                                &windowAttributes);
+  if (!window) return 0;
+  XMapWindow(display, window);
+  XSync(display, True);
+  return window;
+}
+
+// Creates a window, initializes the GAPI instance.
+int main(int argc, char *argv[]) {
+  String program_path = argv[0];
+
+  // Remove all characters starting with last '/'.
+  size_t backslash_pos = program_path.rfind('/');
+  if (backslash_pos != String::npos) {
+    program_path.erase(backslash_pos);
+  }
+  g_program_path = &program_path;
+
+  GAPIGL gl_gapi;
+  g_gapi = &gl_gapi;
+
+  Display *display = XOpenDisplay(0);
+  if (!display) {
+    LOG(FATAL) << "Could not open the display.";
+    return 1;
+  }
+
+  Window window = CreateWindow(display, 300, 300);
+  if (!window) {
+    LOG(FATAL) << "Could not create a window.";
+    return 1;
+  }
+
+  XWindowWrapper wrapper(display, window);
+  gl_gapi.set_window_wrapper(&wrapper);
+
+  int ret = big_test_main(argc, argv);
+
+  g_gapi = NULL;
+  g_program_path = NULL;
+  return ret;
+}