egl_dri2: Split out x11 platform code

1 files changed, 792 insertions, 0 deletions

diff --git a/src/egl/drivers/dri2/platform_x11.c b/src/egl/drivers/dri2/platform_x11.c
new file mode 100644
index 0000000000..3b2f06e748
--- /dev/null
+++ b/src/egl/drivers/dri2/platform_x11.c
@@ -0,0 +1,792 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Kristian Høgsberg <krh@bitplanet.net>
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <limits.h>
+#include <dlfcn.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <xf86drm.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "egl_dri2.h"
+
+/**
+ * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
+ */
+static _EGLSurface *
+dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
+		    _EGLConfig *conf, EGLNativeWindowType window,
+		    const EGLint *attrib_list)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
+   struct dri2_egl_surface *dri2_surf;
+   xcb_get_geometry_cookie_t cookie;
+   xcb_get_geometry_reply_t *reply;
+   xcb_screen_iterator_t s;
+   xcb_generic_error_t *error;
+
+   (void) drv;
+
+   dri2_surf = malloc(sizeof *dri2_surf);
+   if (!dri2_surf) {
+      _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
+      return NULL;
+   }
+   
+   if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
+      goto cleanup_surf;
+
+   dri2_surf->region = XCB_NONE;
+   if (type == EGL_PBUFFER_BIT) {
+      dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
+      s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
+      xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
+			dri2_surf->drawable, s.data->root,
+			dri2_surf->base.Width, dri2_surf->base.Height);
+   } else {
+      dri2_surf->drawable = window;
+   }
+
+   dri2_surf->dri_drawable = 
+      (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
+					    dri2_conf->dri_config, dri2_surf);
+   if (dri2_surf->dri_drawable == NULL) {
+      _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
+      goto cleanup_pixmap;
+   }
+
+   xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
+
+   if (type != EGL_PBUFFER_BIT) {
+      cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
+      reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
+      if (reply == NULL || error != NULL) {
+	 _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
+	 free(error);
+	 goto cleanup_dri_drawable;
+      }
+
+      dri2_surf->base.Width = reply->width;
+      dri2_surf->base.Height = reply->height;
+      free(reply);
+   }
+
+   return &dri2_surf->base;
+
+ cleanup_dri_drawable:
+   dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
+ cleanup_pixmap:
+   if (type == EGL_PBUFFER_BIT)
+      xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
+ cleanup_surf:
+   free(dri2_surf);
+
+   return NULL;
+}
+
+/**
+ * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
+ */
+static _EGLSurface *
+dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
+			   _EGLConfig *conf, EGLNativeWindowType window,
+			   const EGLint *attrib_list)
+{
+   return dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
+			      window, attrib_list);
+}
+
+static _EGLSurface *
+dri2_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
+			   _EGLConfig *conf, EGLNativePixmapType pixmap,
+			   const EGLint *attrib_list)
+{
+   return dri2_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
+			      pixmap, attrib_list);
+}
+
+static _EGLSurface *
+dri2_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
+			    _EGLConfig *conf, const EGLint *attrib_list)
+{
+   return dri2_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
+			      XCB_WINDOW_NONE, attrib_list);
+}
+
+static EGLBoolean
+dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
+
+   (void) drv;
+
+   if (!_eglPutSurface(surf))
+      return EGL_TRUE;
+
+   (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
+   
+   xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
+
+   if (surf->Type == EGL_PBUFFER_BIT)
+      xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
+
+   free(surf);
+
+   return EGL_TRUE;
+}
+
+/**
+ * Process list of buffer received from the server
+ *
+ * Processes the list of buffers received in a reply from the server to either
+ * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
+ */
+static void
+dri2_process_buffers(struct dri2_egl_surface *dri2_surf,
+		     xcb_dri2_dri2_buffer_t *buffers, unsigned count)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   xcb_rectangle_t rectangle;
+   unsigned i;
+
+   dri2_surf->buffer_count = count;
+   dri2_surf->have_fake_front = 0;
+
+   /* This assumes the DRI2 buffer attachment tokens matches the
+    * __DRIbuffer tokens. */
+   for (i = 0; i < count; i++) {
+      dri2_surf->buffers[i].attachment = buffers[i].attachment;
+      dri2_surf->buffers[i].name = buffers[i].name;
+      dri2_surf->buffers[i].pitch = buffers[i].pitch;
+      dri2_surf->buffers[i].cpp = buffers[i].cpp;
+      dri2_surf->buffers[i].flags = buffers[i].flags;
+
+      /* We only use the DRI drivers single buffer configs.  This
+       * means that if we try to render to a window, DRI2 will give us
+       * the fake front buffer, which we'll use as a back buffer.
+       * Note that EGL doesn't require that several clients rendering
+       * to the same window must see the same aux buffers. */
+      if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
+         dri2_surf->have_fake_front = 1;
+   }
+
+   if (dri2_surf->region != XCB_NONE)
+      xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
+
+   rectangle.x = 0;
+   rectangle.y = 0;
+   rectangle.width = dri2_surf->base.Width;
+   rectangle.height = dri2_surf->base.Height;
+   dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
+   xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
+}
+
+static __DRIbuffer *
+dri2_get_buffers(__DRIdrawable * driDrawable,
+		int *width, int *height,
+		unsigned int *attachments, int count,
+		int *out_count, void *loaderPrivate)
+{
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   xcb_dri2_dri2_buffer_t *buffers;
+   xcb_dri2_get_buffers_reply_t *reply;
+   xcb_dri2_get_buffers_cookie_t cookie;
+
+   (void) driDrawable;
+
+   cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
+					    dri2_surf->drawable,
+					    count, count, attachments);
+   reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
+   buffers = xcb_dri2_get_buffers_buffers (reply);
+   if (buffers == NULL)
+      return NULL;
+
+   *out_count = reply->count;
+   dri2_surf->base.Width = *width = reply->width;
+   dri2_surf->base.Height = *height = reply->height;
+   dri2_process_buffers(dri2_surf, buffers, *out_count);
+
+   free(reply);
+
+   return dri2_surf->buffers;
+}
+
+static __DRIbuffer *
+dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
+			     int *width, int *height,
+			     unsigned int *attachments, int count,
+			     int *out_count, void *loaderPrivate)
+{
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   xcb_dri2_dri2_buffer_t *buffers;
+   xcb_dri2_get_buffers_with_format_reply_t *reply;
+   xcb_dri2_get_buffers_with_format_cookie_t cookie;
+   xcb_dri2_attach_format_t *format_attachments;
+
+   (void) driDrawable;
+
+   format_attachments = (xcb_dri2_attach_format_t *) attachments;
+   cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
+							dri2_surf->drawable,
+							count, count,
+							format_attachments);
+
+   reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
+						   cookie, NULL);
+   if (reply == NULL)
+      return NULL;
+
+   buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
+   dri2_surf->base.Width = *width = reply->width;
+   dri2_surf->base.Height = *height = reply->height;
+   *out_count = reply->count;
+   dri2_process_buffers(dri2_surf, buffers, *out_count);
+
+   free(reply);
+
+   return dri2_surf->buffers;
+}
+
+static void
+dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
+{
+   (void) driDrawable;
+
+   /* FIXME: Does EGL support front buffer rendering at all? */
+
+#if 0
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+
+   dri2WaitGL(dri2_surf);
+#else
+   (void) loaderPrivate;
+#endif
+}
+
+static char *
+dri2_strndup(const char *s, int length)
+{
+   char *d;
+
+   d = malloc(length + 1);
+   if (d == NULL)
+      return NULL;
+
+   memcpy(d, s, length);
+   d[length] = '\0';
+
+   return d;
+}
+
+static EGLBoolean
+dri2_connect(struct dri2_egl_display *dri2_dpy)
+{
+   xcb_xfixes_query_version_reply_t *xfixes_query;
+   xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
+   xcb_dri2_query_version_reply_t *dri2_query;
+   xcb_dri2_query_version_cookie_t dri2_query_cookie;
+   xcb_dri2_connect_reply_t *connect;
+   xcb_dri2_connect_cookie_t connect_cookie;
+   xcb_generic_error_t *error;
+   xcb_screen_iterator_t s;
+
+   xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
+   xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
+
+   xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
+						  XCB_XFIXES_MAJOR_VERSION,
+						  XCB_XFIXES_MINOR_VERSION);
+
+   dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
+					       XCB_DRI2_MAJOR_VERSION,
+					       XCB_DRI2_MINOR_VERSION);
+
+   s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
+   connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
+						s.data->root,
+						XCB_DRI2_DRIVER_TYPE_DRI);
+
+   xfixes_query =
+      xcb_xfixes_query_version_reply (dri2_dpy->conn,
+				      xfixes_query_cookie, &error);
+   if (xfixes_query == NULL ||
+       error != NULL || xfixes_query->major_version < 2) {
+      _eglLog(_EGL_FATAL, "DRI2: failed to query xfixes version");
+      free(error);
+      return EGL_FALSE;
+   }
+   free(xfixes_query);
+
+   dri2_query =
+      xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
+   if (dri2_query == NULL || error != NULL) {
+      _eglLog(_EGL_FATAL, "DRI2: failed to query version");
+      free(error);
+      return EGL_FALSE;
+   }
+   dri2_dpy->dri2_major = dri2_query->major_version;
+   dri2_dpy->dri2_minor = dri2_query->minor_version;
+   free(dri2_query);
+
+   connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
+   if (connect == NULL ||
+       connect->driver_name_length + connect->device_name_length == 0) {
+      _eglLog(_EGL_FATAL, "DRI2: failed to authenticate");
+      return EGL_FALSE;
+   }
+
+   dri2_dpy->device_name =
+      dri2_strndup(xcb_dri2_connect_device_name (connect),
+		   xcb_dri2_connect_device_name_length (connect));
+
+   dri2_dpy->driver_name =
+      dri2_strndup(xcb_dri2_connect_driver_name (connect),
+		   xcb_dri2_connect_driver_name_length (connect));
+
+   if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
+      free(dri2_dpy->device_name);
+      free(dri2_dpy->driver_name);
+      free(connect);
+      return EGL_FALSE;
+   }
+   free(connect);
+
+   return EGL_TRUE;
+}
+
+static EGLBoolean
+dri2_authenticate(struct dri2_egl_display *dri2_dpy)
+{
+   xcb_dri2_authenticate_reply_t *authenticate;
+   xcb_dri2_authenticate_cookie_t authenticate_cookie;
+   xcb_screen_iterator_t s;
+   drm_magic_t magic;
+
+   if (drmGetMagic(dri2_dpy->fd, &magic)) {
+      _eglLog(_EGL_FATAL, "DRI2: failed to get drm magic");
+      return EGL_FALSE;
+   }
+
+   s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
+   authenticate_cookie =
+      xcb_dri2_authenticate_unchecked(dri2_dpy->conn, s.data->root, magic);
+   authenticate =
+      xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
+   if (authenticate == NULL || !authenticate->authenticated) {
+      _eglLog(_EGL_FATAL, "DRI2: failed to authenticate");
+      free(authenticate);
+      return EGL_FALSE;
+   }
+
+   free(authenticate);
+
+   return EGL_TRUE;
+}
+
+static EGLBoolean
+dri2_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
+			     _EGLDisplay *disp)
+{
+   xcb_screen_iterator_t s;
+   xcb_depth_iterator_t d;
+   xcb_visualtype_t *visuals;
+   int i, j, id;
+   struct dri2_egl_config *conf;
+   EGLint surface_type;
+
+   s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
+   d = xcb_screen_allowed_depths_iterator(s.data);
+   id = 1;
+
+   surface_type =
+      EGL_WINDOW_BIT |
+      EGL_PIXMAP_BIT |
+      EGL_PBUFFER_BIT |
+      EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
+
+   while (d.rem > 0) {
+      EGLBoolean class_added[6] = { 0, };
+
+      visuals = xcb_depth_visuals(d.data);
+      for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
+	 if (class_added[visuals[i]._class])
+	    continue;
+
+	 class_added[visuals[i]._class] = EGL_TRUE;
+	 for (j = 0; dri2_dpy->driver_configs[j]; j++) {
+	    conf = dri2_add_config(disp, dri2_dpy->driver_configs[j],
+				   id++, d.data->depth, surface_type);
+	    if (conf == NULL)
+	       continue;
+	    _eglSetConfigKey(&conf->base,
+			     EGL_NATIVE_VISUAL_ID, visuals[i].visual_id);
+	    _eglSetConfigKey(&conf->base,
+			     EGL_NATIVE_VISUAL_TYPE, visuals[i]._class);
+	 }
+      }
+
+      xcb_depth_next(&d);
+   }
+
+   if (!_eglGetArraySize(disp->Configs)) {
+      _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
+      return EGL_FALSE;
+   }
+
+   return EGL_TRUE;
+}
+
+static EGLBoolean
+dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
+		 _EGLSurface *draw, xcb_xfixes_region_t region)
+{
+   struct dri2_egl_driver *dri2_drv = dri2_egl_driver(drv);
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+   _EGLContext *ctx;
+   xcb_dri2_copy_region_cookie_t cookie;
+
+   if (dri2_drv->glFlush) {
+      ctx = _eglGetCurrentContext();
+      if (ctx && ctx->DrawSurface == &dri2_surf->base)
+         dri2_drv->glFlush();
+   }
+
+   (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
+
+#if 0
+   /* FIXME: Add support for dri swapbuffers, that'll give us swap
+    * interval and page flipping (at least for fullscreen windows) as
+    * well as the page flip event.  Unless surface->SwapBehavior is
+    * EGL_BUFFER_PRESERVED. */
+#if __DRI2_FLUSH_VERSION >= 2
+   if (pdraw->psc->f)
+      (*pdraw->psc->f->flushInvalidate)(pdraw->driDrawable);
+#endif
+#endif
+
+   if (!dri2_surf->have_fake_front)
+      return EGL_TRUE;
+
+   cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
+					   dri2_surf->drawable,
+					   region,
+					   XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
+					   XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT);
+   free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
+
+   return EGL_TRUE;
+}
+
+static EGLBoolean
+dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
+{
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+
+   return dri2_copy_region(drv, disp, draw, dri2_surf->region);
+}
+
+static EGLBoolean
+dri2_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
+			 EGLint numRects, const EGLint *rects)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+   EGLBoolean ret;
+   xcb_xfixes_region_t region;
+   xcb_rectangle_t rectangles[16];
+   int i;
+
+   if (numRects > (int)ARRAY_SIZE(rectangles))
+      return dri2_copy_region(drv, disp, draw, dri2_surf->region);
+
+   /* FIXME: Invert y here? */
+   for (i = 0; i < numRects; i++) {
+      rectangles[i].x = rects[i * 4];
+      rectangles[i].y = rects[i * 4 + 1];
+      rectangles[i].width = rects[i * 4 + 2];
+      rectangles[i].height = rects[i * 4 + 3];
+   }
+
+   region = xcb_generate_id(dri2_dpy->conn);
+   xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
+   ret = dri2_copy_region(drv, disp, draw, region);
+   xcb_xfixes_destroy_region(dri2_dpy->conn, region);
+
+   return ret;
+}
+
+static EGLBoolean
+dri2_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
+		  EGLNativePixmapType target)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
+   xcb_gcontext_t gc;
+
+   (void) drv;
+
+   (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
+
+   gc = xcb_generate_id(dri2_dpy->conn);
+   xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
+   xcb_copy_area(dri2_dpy->conn,
+		  dri2_surf->drawable,
+		  target,
+		  gc,
+		  0, 0,
+		  0, 0,
+		  dri2_surf->base.Width,
+		  dri2_surf->base.Height);
+   xcb_free_gc(dri2_dpy->conn, gc);
+
+   return EGL_TRUE;
+}
+
+static _EGLImage *
+dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
+			     EGLClientBuffer buffer, const EGLint *attr_list)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_image *dri2_img;
+   unsigned int attachments[1];
+   xcb_drawable_t drawable;
+   xcb_dri2_get_buffers_cookie_t buffers_cookie;
+   xcb_dri2_get_buffers_reply_t *buffers_reply;
+   xcb_dri2_dri2_buffer_t *buffers;
+   xcb_get_geometry_cookie_t geometry_cookie;
+   xcb_get_geometry_reply_t *geometry_reply;
+   xcb_generic_error_t *error;
+   int stride, format;
+
+   (void) ctx;
+
+   drawable = (xcb_drawable_t) buffer;
+   xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
+   attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
+   buffers_cookie =
+      xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
+				      drawable, 1, 1, attachments);
+   geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
+   buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
+					       buffers_cookie, NULL);
+   buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
+   if (buffers == NULL) {
+      return NULL;
+   }
+
+   geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
+					    geometry_cookie, &error);
+   if (geometry_reply == NULL || error != NULL) {
+      _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
+      free(error);
+      free(buffers_reply);
+   }
+
+   switch (geometry_reply->depth) {
+   case 16:
+      format = __DRI_IMAGE_FORMAT_RGB565;
+      break;
+   case 24:
+      format = __DRI_IMAGE_FORMAT_XRGB8888;
+      break;
+   case 32:
+      format = __DRI_IMAGE_FORMAT_ARGB8888;
+      break;
+   default:
+      _eglError(EGL_BAD_PARAMETER,
+		"dri2_create_image_khr: unsupported pixmap depth");
+      free(buffers_reply);
+      free(geometry_reply);
+      return NULL;
+   }
+
+   dri2_img = malloc(sizeof *dri2_img);
+   if (!dri2_img) {
+      free(buffers_reply);
+      free(geometry_reply);
+      _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
+      return EGL_NO_IMAGE_KHR;
+   }
+
+   if (!_eglInitImage(&dri2_img->base, disp)) {
+      free(buffers_reply);
+      free(geometry_reply);
+      return EGL_NO_IMAGE_KHR;
+   }
+
+   stride = buffers[0].pitch / buffers[0].cpp;
+   dri2_img->dri_image =
+      dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
+					   buffers_reply->width,
+					   buffers_reply->height,
+					   format,
+					   buffers[0].name,
+					   stride,
+					   dri2_img);
+
+   free(buffers_reply);
+   free(geometry_reply);
+
+   return &dri2_img->base;
+}
+
+static _EGLImage *
+dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
+			  _EGLContext *ctx, EGLenum target,
+			  EGLClientBuffer buffer, const EGLint *attr_list)
+{
+   (void) drv;
+
+   switch (target) {
+   case EGL_NATIVE_PIXMAP_KHR:
+      return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
+   default:
+      return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
+   }
+}
+
+EGLBoolean
+dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
+{
+   struct dri2_egl_display *dri2_dpy;
+
+   drv->API.CreateWindowSurface = dri2_create_window_surface;
+   drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
+   drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
+   drv->API.DestroySurface = dri2_destroy_surface;
+   drv->API.SwapBuffers = dri2_swap_buffers;
+   drv->API.CopyBuffers = dri2_copy_buffers;
+   drv->API.CreateImageKHR = dri2_x11_create_image_khr;
+   drv->API.SwapBuffersRegionNOK = dri2_swap_buffers_region;
+
+   dri2_dpy = malloc(sizeof *dri2_dpy);
+   if (!dri2_dpy)
+      return _eglError(EGL_BAD_ALLOC, "eglInitialize");
+
+   disp->DriverData = (void *) dri2_dpy;
+   if (disp->PlatformDisplay == NULL) {
+      dri2_dpy->conn = xcb_connect(0, 0);
+   } else {
+      dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
+   }
+
+   if (xcb_connection_has_error(dri2_dpy->conn)) {
+      _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
+      goto cleanup_dpy;
+   }
+
+   if (dri2_dpy->conn) {
+      if (!dri2_connect(dri2_dpy))
+	 goto cleanup_conn;
+   }
+
+   if (!dri2_load_driver(disp))
+      goto cleanup_conn;
+
+   dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR);
+   if (dri2_dpy->fd == -1) {
+      _eglLog(_EGL_WARNING,
+	      "DRI2: could not open %s (%s)", dri2_dpy->device_name,
+              strerror(errno));
+      goto cleanup_driver;
+   }
+
+   if (dri2_dpy->conn) {
+      if (!dri2_authenticate(dri2_dpy))
+	 goto cleanup_fd;
+   }
+
+   if (dri2_dpy->dri2_minor >= 1) {
+      dri2_dpy->loader_extension.base.name = __DRI_DRI2_LOADER;
+      dri2_dpy->loader_extension.base.version = 3;
+      dri2_dpy->loader_extension.getBuffers = dri2_get_buffers;
+      dri2_dpy->loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
+      dri2_dpy->loader_extension.getBuffersWithFormat =
+	 dri2_get_buffers_with_format;
+   } else {
+      dri2_dpy->loader_extension.base.name = __DRI_DRI2_LOADER;
+      dri2_dpy->loader_extension.base.version = 2;
+      dri2_dpy->loader_extension.getBuffers = dri2_get_buffers;
+      dri2_dpy->loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
+      dri2_dpy->loader_extension.getBuffersWithFormat = NULL;
+   }
+      
+   dri2_dpy->extensions[0] = &dri2_dpy->loader_extension.base;
+   dri2_dpy->extensions[1] = &image_lookup_extension.base;
+   dri2_dpy->extensions[2] = NULL;
+
+   if (!dri2_create_screen(disp))
+      goto cleanup_fd;
+
+   if (dri2_dpy->conn) {
+      if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
+	 goto cleanup_configs;
+   }
+
+   disp->Extensions.MESA_drm_image = EGL_TRUE;
+   disp->Extensions.KHR_image_base = EGL_TRUE;
+   disp->Extensions.KHR_image_pixmap = EGL_TRUE;
+   disp->Extensions.KHR_gl_renderbuffer_image = EGL_TRUE;
+   disp->Extensions.KHR_gl_texture_2D_image = EGL_TRUE;
+   disp->Extensions.NOK_swap_region = EGL_TRUE;
+   disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
+
+   /* we're supporting EGL 1.4 */
+   disp->VersionMajor = 1;
+   disp->VersionMinor = 4;
+
+   return EGL_TRUE;
+
+ cleanup_configs:
+   _eglCleanupDisplay(disp);
+   dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
+ cleanup_fd:
+   close(dri2_dpy->fd);
+ cleanup_driver:
+   dlclose(dri2_dpy->driver);
+ cleanup_conn:
+   if (disp->PlatformDisplay == NULL)
+      xcb_disconnect(dri2_dpy->conn);
+ cleanup_dpy:
+   free(dri2_dpy);
+
+   return EGL_FALSE;
+}