Move OpenGL ES 2.0 conformance test support into main tree

gpu/gles2_conform_support/native/egl_native_linux.cc

Index: gpu/gles2_conform_support/native/egl_native_linux.cc
diff --git a/gpu/gles2_conform_support/native/egl_native_linux.cc b/gpu/gles2_conform_support/native/egl_native_linux.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a356e61d968837b55ed1819186c0e64c97667c82
--- /dev/null
+++ b/gpu/gles2_conform_support/native/egl_native_linux.cc
@@ -0,0 +1,121 @@
+// 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 <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <gdk/gdkx.h>
+#include <gtk/gtk.h>
+
+extern "C" {
+#if defined(GLES2_CONFORM_SUPPORT_ONLY)
+#include "gpu/gles2_conform_support/gtf/gtf_stubs.h"
+#else
+#include "third_party/gles2_conform/GTF_ES/glsl/GTF/Source/eglNative.h"
+#endif
+}
+
+
+GTFbool GTFNativeCreateDisplay(EGLNativeDisplayType *pNativeDisplay) {
+  int argc = 0;
+  char **argv = NULL;
+  gtk_init(&argc, &argv);
+  *pNativeDisplay = GDK_DISPLAY();;
+  return *pNativeDisplay ? GTFtrue : GTFfalse;
+}
+
+void GTFNativeDestroyDisplay(EGLNativeDisplayType nativeDisplay) {
+  gtk_exit(0);
+}
+
+GTFbool GTFNativeCreateWindow(EGLNativeDisplayType nativeDisplay,
+                              EGLDisplay eglDisplay, EGLConfig eglConfig,
+                              const char* title, int width, int height,
+                              EGLNativeWindowType *pNativeWindow) {
+#ifdef CHROMEOS_GLES2_CONFORMANCE
+  // Due to the behavior of ChromeOS window manager, which always resize the
+  // top level window etc, we had to create a popup window.
+  GtkWidget* hwnd = gtk_window_new(GTK_WINDOW_POPUP);
+#else
+  GtkWidget* hwnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+#endif
+
+  gtk_window_set_title(GTK_WINDOW(hwnd), title);
+  gtk_window_set_default_size(GTK_WINDOW(hwnd), width, height);
+  gtk_widget_set_double_buffered(hwnd, FALSE);
+  gtk_widget_set_app_paintable(hwnd, TRUE);
+
+  // We had to enter gtk main loop to realize the window on ChromeOS.
+  gtk_widget_show_now(hwnd);
+
+  *pNativeWindow = GDK_WINDOW_XWINDOW(hwnd->window);
+
+  return GTFtrue;
+}
+
+void GTFNativeDestroyWindow(EGLNativeDisplayType nativeDisplay,
+                            EGLNativeWindowType nativeWindow) {
+  GdkWindow* window = gdk_window_lookup(nativeWindow);
+  gpointer widget = NULL;
+  gdk_window_get_user_data(window, &widget);
+  gtk_widget_destroy(GTK_WIDGET(widget));
+}
+
+EGLImageKHR GTFCreateEGLImage(int width, int height,
+                              GLenum format, GLenum type) {
+  PFNEGLCREATEIMAGEKHRPROC egl_create_image_khr_;
+  egl_create_image_khr_ = reinterpret_cast<PFNEGLCREATEIMAGEKHRPROC>
+                            (eglGetProcAddress("eglCreateImageKHR"));
+
+  static const EGLint attrib[] = {
+    EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
+    EGL_GL_TEXTURE_LEVEL_KHR, 0,
+    EGL_NONE
+  };
+
+  if (format != GL_RGBA && format != GL_RGB)
+    return static_cast<EGLImageKHR>(NULL);
+
+  if (type != GL_UNSIGNED_BYTE)
+    return static_cast<EGLImageKHR>(NULL);
+
+  GLuint texture;
+  glGenTextures(1, &texture);
+  glBindTexture(GL_TEXTURE_2D, texture);
+  glTexImage2D(GL_TEXTURE_2D,
+               0,
+               format,
+               width,
+               height,
+               0,
+               format,
+               type,
+               NULL);
+
+  // Disable mip-maps because we do not require it.
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+  if(glGetError() != GL_NO_ERROR)
+    return static_cast<EGLImageKHR>(NULL);
+
+  EGLImageKHR egl_image =
+      egl_create_image_khr_(eglGetCurrentDisplay(),
+                            eglGetCurrentContext(),
+                            EGL_GL_TEXTURE_2D_KHR,
+                            reinterpret_cast<EGLClientBuffer>(texture),
+                            attrib);
+
+  if (eglGetError() == EGL_SUCCESS)
+    return egl_image;
+  else
+    return static_cast<EGLImageKHR>(NULL);
+}
+
+void GTFDestroyEGLImage(EGLImageKHR image) {
+  PFNEGLDESTROYIMAGEKHRPROC egl_destroy_image_khr_;
+  egl_destroy_image_khr_ = reinterpret_cast<PFNEGLDESTROYIMAGEKHRPROC>
+                             (eglGetProcAddress("eglDestroyImageKHR"));
+
+  egl_destroy_image_khr_(eglGetCurrentDisplay(), image);
+}