src/cairo-xcb-connection-shm.c

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright © 2009 Intel Corporation
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it either under the terms of the GNU Lesser General Public
   7  * License version 2.1 as published by the Free Software Foundation
   8  * (the "LGPL") or, at your option, under the terms of the Mozilla
   9  * Public License Version 1.1 (the "MPL"). If you do not alter this
  10  * notice, a recipient may use your version of this file under either
  11  * the MPL or the LGPL.
  12  *
  13  * You should have received a copy of the LGPL along with this library
  14  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  16  * You should have received a copy of the MPL along with this library
  17  * in the file COPYING-MPL-1.1
  18  *
  19  * The contents of this file are subject to the Mozilla Public License
  20  * Version 1.1 (the "License"); you may not use this file except in
  21  * compliance with the License. You may obtain a copy of the License at
  22  * http://www.mozilla.org/MPL/
  23  *
  24  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  25  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  26  * the specific language governing rights and limitations.
  27  *
  28  * Contributor(s):
  29  *      Chris Wilson <chris@chris-wilson.co.uk>
  30  */
  31
  32 #include "cairoint.h"
  33
  34 #if CAIRO_HAS_XCB_SHM_FUNCTIONS
  35
  36 #include "cairo-xcb-private.h"
  37
  38 #include <xcb/xcbext.h>
  39 #include <xcb/shm.h>
  40
  41 uint32_t
  42 _cairo_xcb_connection_shm_attach (cairo_xcb_connection_t *connection,
  43                                   uint32_t id,
  44                                   cairo_bool_t readonly)
  45 {
  46     uint32_t segment = _cairo_xcb_connection_get_xid (connection);
  47     xcb_shm_attach (connection->xcb_connection, segment, id, readonly);
  48     return segment;
  49 }
  50
  51 void
  52 _cairo_xcb_connection_shm_put_image (cairo_xcb_connection_t *connection,
  53                                      xcb_drawable_t dst,
  54                                      xcb_gcontext_t gc,
  55                                      uint16_t total_width,
  56                                      uint16_t total_height,
  57                                      int16_t src_x,
  58                                      int16_t src_y,
  59                                      uint16_t width,
  60                                      uint16_t height,
  61                                      int16_t dst_x,
  62                                      int16_t dst_y,
  63                                      uint8_t depth,
  64                                      uint32_t shm,
  65                                      uint32_t offset)
  66 {
  67     xcb_shm_put_image (connection->xcb_connection, dst, gc, total_width, total_height,
  68                        src_x, src_y, width, height, dst_x, dst_y, depth,
  69                        XCB_IMAGE_FORMAT_Z_PIXMAP, 0, shm, offset);
  70 }
  71
  72 cairo_status_t
  73 _cairo_xcb_connection_shm_get_image (cairo_xcb_connection_t *connection,
  74                                      xcb_drawable_t src,
  75                                      int16_t src_x,
  76                                      int16_t src_y,
  77                                      uint16_t width,
  78                                      uint16_t height,
  79                                      uint32_t shmseg,
  80                                      uint32_t offset)
  81 {
  82     xcb_shm_get_image_reply_t *reply;
  83     xcb_generic_error_t *error;
  84
  85     reply = xcb_shm_get_image_reply (connection->xcb_connection,
  86                                      xcb_shm_get_image (connection->xcb_connection,
  87                                                         src,
  88                                                         src_x, src_y,
  89                                                         width, height,
  90                                                         (uint32_t) -1,
  91                                                         XCB_IMAGE_FORMAT_Z_PIXMAP,
  92                                                         shmseg, offset),
  93                                      &error);
  94     free (reply);
  95
  96     if (error) {
  97         /* an error here should be impossible */
  98         free (error);
  99         return _cairo_error (CAIRO_STATUS_READ_ERROR);
 100     }
 101
 102     return CAIRO_STATUS_SUCCESS;
 103 }
 104
 105 void
 106 _cairo_xcb_connection_shm_detach (cairo_xcb_connection_t *connection,
 107                                   uint32_t segment)
 108 {
 109     xcb_shm_detach (connection->xcb_connection, segment);
 110     _cairo_xcb_connection_put_xid (connection, segment);
 111 }
 112
 113 #endif /* CAIRO_HAS_XCB_SHM_FUNCTIONS */