IABSD.fr/xenocara/driver/xf86-video-intel/test/dri3.c

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• Author : matthieu
  Date : 2015-04-12 19:41:54
  Hash : d031df27
  Message : Update to xf86-video-intel 2.99.916 Fixes a display bug seenby ajacoutot@, ok jsg@ and kettenis@. newer X.Org (2.99.917 or master) version cause corruption on older machines (X40, i965), probably caused by a bug in our kernel, under investigation by kettenis@.

• driver/xf86-video-intel/test/dri3.c

• /*
   * Copyright (c) 2014 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.
   *
   */
  
  #include <X11/Xlib.h>
  #include <X11/Xlib-xcb.h>
  #include <X11/xshmfence.h>
  #include <xcb/xcb.h>
  #include <xcb/dri3.h>
  #include <xcb/sync.h>
  #include <unistd.h>
  
  #include "dri3.h"
  
  Pixmap dri3_create_pixmap(Display *dpy,
  			  Drawable draw,
  			  int width, int height, int depth,
  			  int fd, int bpp, int stride, int size)
  {
  	xcb_connection_t *c = XGetXCBConnection(dpy);
  	if (fd >= 0) {
  		xcb_pixmap_t pixmap = xcb_generate_id(c);
  		xcb_dri3_pixmap_from_buffer(c, pixmap, draw, size, width, height, stride, depth, bpp, fd);
  		return pixmap;
  	}
  	return 0;
  }
  
  int dri3_create_fd(Display *dpy,
  		   Pixmap pixmap,
  		   int *stride)
  {
  	xcb_connection_t *c = XGetXCBConnection(dpy);
  	xcb_dri3_buffer_from_pixmap_cookie_t cookie;
  	xcb_dri3_buffer_from_pixmap_reply_t *reply;
  
  	cookie = xcb_dri3_buffer_from_pixmap(c, pixmap);
  	reply = xcb_dri3_buffer_from_pixmap_reply(c, cookie, NULL);
  	if (!reply)
  		return -1;
  
  	if (reply->nfd != 1)
  		return -1;
  
  	*stride = reply->stride;
  	return xcb_dri3_buffer_from_pixmap_reply_fds(c, reply)[0];
  }
  
  int dri3_create_fence(Display *dpy, Pixmap pixmap, struct dri3_fence *fence)
  {
  	xcb_connection_t *c = XGetXCBConnection(dpy);
  	struct dri3_fence f;
  	int fd;
  
  	fd = xshmfence_alloc_shm();
  	if (fd < 0)
  		return -1;
  
  	f.addr = xshmfence_map_shm(fd);
  	if (f.addr == NULL) {
  		close(fd);
  		return -1;
  	}
  
  	f.xid = xcb_generate_id(c);
  	xcb_dri3_fence_from_fd(c, pixmap, f.xid, 0, fd);
  
  	*fence = f;
  	return 0;
  }
  
  void dri3_fence_sync(Display *dpy, struct dri3_fence *fence)
  {
  	xcb_connection_t *c = XGetXCBConnection(dpy);
  
  	xshmfence_reset(fence->addr);
  
  	xcb_sync_trigger_fence(c, fence->xid);
  	xcb_flush(c);
  
  	xshmfence_await(fence->addr);
  }
  
  void dri3_fence_free(Display *dpy, struct dri3_fence *fence)
  {
  	xcb_connection_t *c = XGetXCBConnection(dpy);
  
  	xshmfence_unmap_shm(fence->addr);
  	xcb_sync_destroy_fence(c, fence->xid);
  }
  
  int dri3_open__full(Display *dpy, Window root, unsigned provider)
  {
  	xcb_connection_t *c = XGetXCBConnection(dpy);
  	xcb_dri3_open_cookie_t cookie;
  	xcb_dri3_open_reply_t *reply;
  
  	cookie = xcb_dri3_open(c, root, provider);
  	reply = xcb_dri3_open_reply(c, cookie, NULL);
  
  	if (!reply)
  		return -1;
  
  	if (reply->nfd != 1)
  		return -1;
  
  	return xcb_dri3_open_reply_fds(c, reply)[0];
  }
  
  int dri3_open(Display *dpy)
  {
  	return dri3_open__full(dpy, RootWindow(dpy, DefaultScreen(dpy)), None);
  }