1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* Contributor(s):
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairoint.h"
#include "cairo-xcb-private.h"
#include <xcb/xcbext.h>
#include <xcb/shm.h>
uint32_t
_cairo_xcb_connection_shm_attach (cairo_xcb_connection_t *connection,
uint32_t id,
cairo_bool_t readonly)
{
struct {
uint8_t req;
uint8_t shm_req;
uint16_t length;
uint32_t segment;
uint32_t id;
uint8_t readonly;
uint8_t pad1;
uint16_t pad2;
} req;
struct iovec vec[1];
COMPILE_TIME_ASSERT (sizeof (req) == 16);
req.req = connection->shm->major_opcode;
req.shm_req = 1;
req.length = sizeof (req) >> 2;
req.segment = _cairo_xcb_connection_get_xid (connection);
req.id = id;
req.readonly = readonly;
vec[0].iov_base = &req;
vec[0].iov_len = sizeof (req);
_cairo_xcb_connection_write (connection, vec, 1);
return req.segment;
}
uint64_t
_cairo_xcb_connection_shm_put_image (cairo_xcb_connection_t *connection,
xcb_drawable_t dst,
xcb_gcontext_t gc,
uint16_t total_width,
uint16_t total_height,
int16_t src_x,
int16_t src_y,
uint16_t width,
uint16_t height,
int16_t dst_x,
int16_t dst_y,
uint8_t depth,
uint32_t shm,
uint32_t offset)
{
struct {
uint8_t req;
uint8_t shm_req;
uint16_t len;
uint32_t dst;
uint32_t gc;
uint16_t total_width;
uint16_t total_height;
int16_t src_x;
int16_t src_y;
uint16_t src_width;
uint16_t src_height;
int16_t dst_x;
int16_t dst_y;
uint8_t depth;
uint8_t format;
uint8_t send_event;
uint8_t pad;
uint32_t shm;
uint32_t offset;
} req;
struct iovec vec[2];
req.req = connection->shm->major_opcode;
req.shm_req = 3;
req.len = sizeof (req) >> 2;
req.dst = dst;
req.gc = gc;
req.total_width = total_width;
req.total_height = total_height;
req.src_x = src_x;
req.src_y = src_y;
req.src_width = width;
req.src_height = height;
req.dst_x = dst_x;
req.dst_y = dst_y;
req.depth = depth;
req.format = XCB_IMAGE_FORMAT_Z_PIXMAP;
req.send_event = 0;
req.shm = shm;
req.offset = offset;
vec[0].iov_base = &req;
vec[0].iov_len = sizeof (req);
_cairo_xcb_connection_write (connection, vec, 1);
return connection->seqno;
}
cairo_status_t
_cairo_xcb_connection_shm_get_image (cairo_xcb_connection_t *connection,
xcb_drawable_t src,
int16_t src_x,
int16_t src_y,
uint16_t width,
uint16_t height,
uint32_t shmseg,
uint32_t offset)
{
xcb_shm_get_image_reply_t *reply;
xcb_generic_error_t *error;
reply = xcb_shm_get_image_reply (connection->xcb_connection,
xcb_shm_get_image (connection->xcb_connection,
src,
src_x, src_y,
width, height,
(uint32_t) -1,
XCB_IMAGE_FORMAT_Z_PIXMAP,
shmseg, offset),
&error);
free (reply);
if (error) {
/* an error here should be impossible */
free (error);
return _cairo_error (CAIRO_STATUS_READ_ERROR);
}
return _cairo_xcb_connection_take_socket (connection);
}
void
_cairo_xcb_connection_shm_detach (cairo_xcb_connection_t *connection,
uint32_t segment)
{
struct {
uint8_t req;
uint8_t shm_req;
uint16_t length;
uint32_t segment;
} req;
struct iovec vec[1];
COMPILE_TIME_ASSERT (sizeof (req) == 8);
req.req = connection->shm->major_opcode;
req.shm_req = 2;
req.length = sizeof (req) >> 2;
req.segment = segment;
vec[0].iov_base = &req;
vec[0].iov_len = sizeof (req);
_cairo_xcb_connection_write (connection, vec, 1);
_cairo_xcb_connection_put_xid (connection, segment);
}
|
