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/* 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
*
* 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.
*
* Authors:
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairoint.h"
#include "cairo-xcb-private.h"
#include "cairo-hash-private.h"
#include "cairo-freelist-private.h"
#include "cairo-list-inline.h"
#include <xcb/xcbext.h>
#include <xcb/bigreq.h>
#include <errno.h>
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
#include <sys/ipc.h>
#include <sys/shm.h>
#include <xcb/shm.h>
#endif
typedef struct _cairo_xcb_xrender_format {
cairo_hash_entry_t key;
xcb_render_pictformat_t xrender_format;
} cairo_xcb_xrender_format_t;
typedef struct _cairo_xcb_xid {
cairo_list_t link;
uint32_t xid;
} cairo_xcb_xid_t;
#define XCB_RENDER_AT_LEAST(V, major, minor) \
(((V)->major_version > major) || \
(((V)->major_version == major) && ((V)->minor_version >= minor)))
#define XCB_RENDER_HAS_CREATE_PICTURE(surface) XCB_RENDER_AT_LEAST((surface), 0, 0)
#define XCB_RENDER_HAS_COMPOSITE(surface) XCB_RENDER_AT_LEAST((surface), 0, 0)
#define XCB_RENDER_HAS_COMPOSITE_TEXT(surface) XCB_RENDER_AT_LEAST((surface), 0, 0)
#define XCB_RENDER_HAS_FILL_RECTANGLES(surface) XCB_RENDER_AT_LEAST((surface), 0, 1)
#define XCB_RENDER_HAS_DISJOINT(surface) XCB_RENDER_AT_LEAST((surface), 0, 2)
#define XCB_RENDER_HAS_CONJOINT(surface) XCB_RENDER_AT_LEAST((surface), 0, 2)
#define XCB_RENDER_HAS_TRAPEZOIDS(surface) XCB_RENDER_AT_LEAST((surface), 0, 4)
#define XCB_RENDER_HAS_TRIANGLES(surface) XCB_RENDER_AT_LEAST((surface), 0, 4)
#define XCB_RENDER_HAS_TRISTRIP(surface) XCB_RENDER_AT_LEAST((surface), 0, 4)
#define XCB_RENDER_HAS_TRIFAN(surface) XCB_RENDER_AT_LEAST((surface), 0, 4)
#define XCB_RENDER_HAS_PICTURE_TRANSFORM(surface) XCB_RENDER_AT_LEAST((surface), 0, 6)
#define XCB_RENDER_HAS_FILTERS(surface) XCB_RENDER_AT_LEAST((surface), 0, 6)
#define XCB_RENDER_HAS_FILTER_GOOD(surface) FALSE
#define XCB_RENDER_HAS_FILTER_BEST(surface) FALSE
#define XCB_RENDER_HAS_SUBPIXEL_ORDER(surface) XCB_RENDER_AT_LEAST((surface), 0, 6)
#define XCB_RENDER_HAS_EXTENDED_REPEAT(surface) XCB_RENDER_AT_LEAST((surface), 0, 10)
#define XCB_RENDER_HAS_GRADIENTS(surface) XCB_RENDER_AT_LEAST((surface), 0, 10)
#define XCB_RENDER_HAS_PDF_OPERATORS(surface) XCB_RENDER_AT_LEAST((surface), 0, 11)
static cairo_list_t connections;
static cairo_status_t
_cairo_xcb_connection_find_visual_formats (cairo_xcb_connection_t *connection,
const xcb_render_query_pict_formats_reply_t *formats)
{
xcb_render_pictscreen_iterator_t screens;
xcb_render_pictdepth_iterator_t depths;
xcb_render_pictvisual_iterator_t visuals;
for (screens = xcb_render_query_pict_formats_screens_iterator (formats);
screens.rem;
xcb_render_pictscreen_next (&screens))
{
for (depths = xcb_render_pictscreen_depths_iterator (screens.data);
depths.rem;
xcb_render_pictdepth_next (&depths))
{
for (visuals = xcb_render_pictdepth_visuals_iterator (depths.data);
visuals.rem;
xcb_render_pictvisual_next (&visuals))
{
cairo_xcb_xrender_format_t *f;
cairo_status_t status;
f = _cairo_malloc (sizeof (cairo_xcb_xrender_format_t));
if (unlikely (f == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
f->key.hash = visuals.data->visual;
f->xrender_format = visuals.data->format;
status = _cairo_hash_table_insert (connection->visual_to_xrender_format,
&f->key);
if (unlikely (status))
return status;
}
}
}
return CAIRO_STATUS_SUCCESS;
}
#if 0
static xcb_format_t *
find_format_for_depth (const xcb_setup_t *setup, uint8_t depth)
{
xcb_format_t *fmt = xcb_setup_pixmap_formats (setup);
xcb_format_t *fmtend = fmt + xcb_setup_pixmap_formats_length (setup);
for (; fmt != fmtend; ++fmt)
if (fmt->depth == depth)
return fmt;
return 0;
}
#endif
static cairo_status_t
_cairo_xcb_connection_parse_xrender_formats (cairo_xcb_connection_t *connection,
const xcb_render_query_pict_formats_reply_t *formats)
{
xcb_render_pictforminfo_iterator_t i;
cairo_status_t status;
for (i = xcb_render_query_pict_formats_formats_iterator (formats);
i.rem;
xcb_render_pictforminfo_next (&i))
{
cairo_format_masks_t masks;
pixman_format_code_t pixman_format;
if (i.data->type != XCB_RENDER_PICT_TYPE_DIRECT)
continue;
masks.alpha_mask =
(unsigned long) i.data->direct.alpha_mask << i.data->direct.alpha_shift;
masks.red_mask =
(unsigned long) i.data->direct.red_mask << i.data->direct.red_shift;
masks.green_mask =
(unsigned long) i.data->direct.green_mask << i.data->direct.green_shift;
masks.blue_mask =
(unsigned long) i.data->direct.blue_mask << i.data->direct.blue_shift;
masks.bpp = i.data->depth;
if (_pixman_format_from_masks (&masks, &pixman_format)) {
cairo_hash_entry_t key;
key.hash = pixman_format;
if (! _cairo_hash_table_lookup (connection->xrender_formats, &key)) {
cairo_xcb_xrender_format_t *f;
f = _cairo_malloc (sizeof (cairo_xcb_xrender_format_t));
if (unlikely (f == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
f->key.hash = pixman_format;
f->xrender_format = i.data->id;
status = _cairo_hash_table_insert (connection->xrender_formats,
&f->key);
if (unlikely (status))
return status;
#if 0
printf ("xrender %x -> (%lx, %lx, %lx, %lx, %d) %x [%d, %d]\n",
i.data->id,
masks.alpha_mask,
masks.red_mask,
masks.green_mask,
masks.blue_mask,
masks.bpp,
pixman_format,
PIXMAN_FORMAT_DEPTH(pixman_format),
PIXMAN_FORMAT_BPP(pixman_format));
#endif
}
}
}
status = _cairo_xcb_connection_find_visual_formats (connection, formats);
if (unlikely (status))
return status;
connection->standard_formats[CAIRO_FORMAT_A1] =
_cairo_xcb_connection_get_xrender_format (connection, PIXMAN_a1);
connection->standard_formats[CAIRO_FORMAT_A8] =
_cairo_xcb_connection_get_xrender_format (connection, PIXMAN_a8);
connection->standard_formats[CAIRO_FORMAT_RGB24] =
_cairo_xcb_connection_get_xrender_format (connection,
PIXMAN_FORMAT (24,
PIXMAN_TYPE_ARGB,
0, 8, 8, 8));
if (connection->standard_formats[CAIRO_FORMAT_RGB24] == XCB_NONE) {
connection->standard_formats[CAIRO_FORMAT_RGB24] =
_cairo_xcb_connection_get_xrender_format (connection,
PIXMAN_FORMAT (24, PIXMAN_TYPE_ABGR,
0, 8, 8, 8));
}
connection->standard_formats[CAIRO_FORMAT_ARGB32] =
_cairo_xcb_connection_get_xrender_format (connection, PIXMAN_a8r8g8b8);
if (connection->standard_formats[CAIRO_FORMAT_ARGB32] == XCB_NONE) {
connection->standard_formats[CAIRO_FORMAT_ARGB32] =
_cairo_xcb_connection_get_xrender_format (connection, PIXMAN_a8b8g8r8);
}
return CAIRO_STATUS_SUCCESS;
}
/*
* We require support for depth 1, 8, 24 and 32 pixmaps
*/
#define DEPTH_MASK(d) (1 << ((d) - 1))
#define REQUIRED_DEPTHS (DEPTH_MASK(1) | \
DEPTH_MASK(8) | \
DEPTH_MASK(24) | \
DEPTH_MASK(32))
static cairo_bool_t
pixmap_depths_usable (cairo_xcb_connection_t *connection,
uint32_t missing,
xcb_drawable_t root)
{
xcb_connection_t *c = connection->xcb_connection;
xcb_void_cookie_t create_cookie[32];
xcb_pixmap_t pixmap;
cairo_bool_t success = TRUE;
int depth, i, j;
pixmap = _cairo_xcb_connection_get_xid (connection);
for (depth = 1, i = 0; depth <= 32; depth++) {
if (missing & DEPTH_MASK(depth)) {
create_cookie[i] = xcb_create_pixmap_checked (c, depth, pixmap, root, 1, 1);
xcb_free_pixmap (c, pixmap);
if (!create_cookie[i].sequence) {
success = FALSE;
break;
}
i++;
}
}
for (j = 0; j < i; j++) {
xcb_generic_error_t *create_error = xcb_request_check (c, create_cookie[j]);
success &= create_error == NULL;
free (create_error);
}
_cairo_xcb_connection_put_xid (connection, pixmap);
return success;
}
static cairo_bool_t
has_required_depths (cairo_xcb_connection_t *connection)
{
xcb_screen_iterator_t screens;
for (screens = xcb_setup_roots_iterator (connection->root);
screens.rem;
xcb_screen_next (&screens))
{
xcb_depth_iterator_t depths;
uint32_t missing = REQUIRED_DEPTHS;
for (depths = xcb_screen_allowed_depths_iterator (screens.data);
depths.rem;
xcb_depth_next (&depths))
{
missing &= ~DEPTH_MASK (depths.data->depth);
}
if (missing == 0)
continue;
/*
* Ok, this is ugly. It should be sufficient at this
* point to just return false, but Xinerama is broken at
* this point and only advertises depths which have an
* associated visual. Of course, the other depths still
* work, but the only way to find out is to try them.
*/
if (! pixmap_depths_usable (connection, missing, screens.data->root))
return FALSE;
}
return TRUE;
}
static xcb_render_query_version_reply_t *
_render_restrict_env(xcb_render_query_version_reply_t *version)
{
const char *env;
if (version == NULL)
return NULL;
env = getenv ("CAIRO_DEBUG");
if (env != NULL)
env = strstr (env, "xrender-version=");
if (env != NULL) {
int max_render_major, max_render_minor;
env += sizeof ("xrender-version=") - 1;
if (sscanf (env, "%d.%d", &max_render_major, &max_render_minor) != 2)
max_render_major = max_render_minor = -1;
if (max_render_major < 0 || max_render_minor < 0) {
free (version);
return NULL;
}
if (max_render_major < (int) version->major_version ||
(max_render_major == (int) version->major_version &&
max_render_minor < (int) version->minor_version))
{
version->major_version = max_render_major;
version->minor_version = max_render_minor;
}
}
return version;
}
static cairo_status_t
_cairo_xcb_connection_query_render (cairo_xcb_connection_t *connection)
{
xcb_connection_t *c = connection->xcb_connection;
xcb_render_query_version_cookie_t version_cookie;
xcb_render_query_pict_formats_cookie_t formats_cookie;
xcb_render_query_version_reply_t *version;
xcb_render_query_pict_formats_reply_t *formats;
cairo_status_t status;
cairo_bool_t present;
version_cookie = xcb_render_query_version (c, XCB_RENDER_MAJOR_VERSION, XCB_RENDER_MINOR_VERSION);
formats_cookie = xcb_render_query_pict_formats (c);
present = has_required_depths (connection);
version = xcb_render_query_version_reply (c, version_cookie, 0);
formats = xcb_render_query_pict_formats_reply (c, formats_cookie, 0);
version = _render_restrict_env (version);
if (! present || version == NULL || formats == NULL) {
free (version);
free (formats);
return CAIRO_STATUS_SUCCESS;
}
/* always true if the extension is present (i.e. >= 0.0) */
connection->flags |= CAIRO_XCB_HAS_RENDER;
connection->flags |= CAIRO_XCB_RENDER_HAS_COMPOSITE;
connection->flags |= CAIRO_XCB_RENDER_HAS_COMPOSITE_GLYPHS;
if (XCB_RENDER_HAS_FILL_RECTANGLES (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_FILL_RECTANGLES;
if (XCB_RENDER_HAS_TRAPEZOIDS (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_COMPOSITE_TRAPEZOIDS;
if (XCB_RENDER_HAS_PICTURE_TRANSFORM (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_PICTURE_TRANSFORM;
if (XCB_RENDER_HAS_FILTERS (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_FILTERS;
if (XCB_RENDER_HAS_FILTER_GOOD (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_FILTER_GOOD;
if (XCB_RENDER_HAS_FILTER_BEST (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_FILTER_BEST;
if (XCB_RENDER_HAS_PDF_OPERATORS (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_PDF_OPERATORS;
if (XCB_RENDER_HAS_EXTENDED_REPEAT (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_EXTENDED_REPEAT;
if (XCB_RENDER_HAS_GRADIENTS (version))
connection->flags |= CAIRO_XCB_RENDER_HAS_GRADIENTS;
if (XCB_RENDER_HAS_SUBPIXEL_ORDER (version)) {
uint32_t screen;
uint32_t *subpixel = xcb_render_query_pict_formats_subpixels(formats);
/* The spec explicitly allows to have too few entries in the reply... */
for (screen = 0; screen < formats->num_subpixel && screen < connection->root->roots_len; screen++)
connection->subpixel_orders[screen] = subpixel[screen];
}
free (version);
status = _cairo_xcb_connection_parse_xrender_formats (connection, formats);
free (formats);
return status;
}
#if 0
static void
_cairo_xcb_connection_query_cairo (cairo_xcb_connection_t *connection)
{
xcb_connection_t *c = connection->xcb_connection;
xcb_cairo_query_version_reply_t *version;
version = xcb_cairo_query_version_reply (c,
xcb_cairo_query_version (c, 0, 0),
0);
free (version);
}
#endif
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
static cairo_bool_t
can_use_shm (cairo_xcb_connection_t *connection)
{
cairo_bool_t success = TRUE;
xcb_connection_t *c = connection->xcb_connection;
xcb_void_cookie_t cookie[2];
xcb_generic_error_t *error;
int shmid;
uint32_t shmseg;
void *ptr;
shmid = shmget (IPC_PRIVATE, 0x1000, IPC_CREAT | 0600);
if (shmid == -1)
return FALSE;
ptr = shmat (shmid, NULL, 0);
if (ptr == (char *) -1) {
shmctl (shmid, IPC_RMID, NULL);
return FALSE;
}
shmseg = _cairo_xcb_connection_get_xid (connection);
cookie[0] = xcb_shm_attach_checked (c, shmseg, shmid, FALSE);
cookie[1] = xcb_shm_detach_checked (c, shmseg);
_cairo_xcb_connection_put_xid (connection, shmseg);
error = xcb_request_check (c, cookie[0]);
if (error != NULL)
success = FALSE;
error = xcb_request_check (c, cookie[1]);
if (error != NULL)
success = FALSE;
shmctl (shmid, IPC_RMID, NULL);
shmdt (ptr);
return success;
}
static void
_cairo_xcb_connection_query_shm (cairo_xcb_connection_t *connection)
{
xcb_connection_t *c = connection->xcb_connection;
xcb_shm_query_version_reply_t *version;
version = xcb_shm_query_version_reply (c, xcb_shm_query_version (c), 0);
if (version == NULL)
return;
free (version);
if (can_use_shm (connection))
connection->flags |= CAIRO_XCB_HAS_SHM;
}
#endif
static cairo_status_t
_device_flush (void *device)
{
cairo_xcb_connection_t *connection = device;
cairo_status_t status;
status = cairo_device_acquire (&connection->device);
if (unlikely (status))
return status;
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
_cairo_xcb_connection_shm_mem_pools_flush (connection);
#endif
xcb_flush (connection->xcb_connection);
cairo_device_release (&connection->device);
return CAIRO_STATUS_SUCCESS;
}
static void
_pluck_xrender_format (void *entry,
void *closure)
{
_cairo_hash_table_remove (closure, entry);
free (entry);
}
static void
_device_finish (void *device)
{
cairo_xcb_connection_t *connection = device;
cairo_bool_t was_cached = FALSE;
if (! cairo_list_is_empty (&connection->link)) {
CAIRO_MUTEX_LOCK (_cairo_xcb_connections_mutex);
cairo_list_del (&connection->link);
CAIRO_MUTEX_UNLOCK (_cairo_xcb_connections_mutex);
was_cached = TRUE;
}
while (! cairo_list_is_empty (&connection->fonts)) {
cairo_xcb_font_t *font;
font = cairo_list_first_entry (&connection->fonts,
cairo_xcb_font_t,
link);
_cairo_xcb_font_close (font);
}
while (! cairo_list_is_empty (&connection->screens)) {
cairo_xcb_screen_t *screen;
screen = cairo_list_first_entry (&connection->screens,
cairo_xcb_screen_t,
link);
_cairo_xcb_screen_finish (screen);
}
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
/* _cairo_xcb_screen_finish finishes surfaces. If any of those surfaces had
* a fallback image, we might have done a SHM PutImage. */
_cairo_xcb_connection_shm_mem_pools_flush (connection);
#endif
if (was_cached)
cairo_device_destroy (device);
}
static void
_device_destroy (void *device)
{
cairo_xcb_connection_t *connection = device;
_cairo_hash_table_foreach (connection->xrender_formats,
_pluck_xrender_format, connection->xrender_formats);
_cairo_hash_table_destroy (connection->xrender_formats);
_cairo_hash_table_foreach (connection->visual_to_xrender_format,
_pluck_xrender_format,
connection->visual_to_xrender_format);
_cairo_hash_table_destroy (connection->visual_to_xrender_format);
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
_cairo_xcb_connection_shm_mem_pools_fini (connection);
#endif
_cairo_freepool_fini (&connection->shm_info_freelist);
_cairo_freepool_fini (&connection->xid_pool);
CAIRO_MUTEX_FINI (connection->shm_mutex);
CAIRO_MUTEX_FINI (connection->screens_mutex);
free (connection->subpixel_orders);
free (connection);
}
static const cairo_device_backend_t _cairo_xcb_device_backend = {
CAIRO_DEVICE_TYPE_XCB,
NULL, NULL, /* lock, unlock */
_device_flush,
_device_finish,
_device_destroy,
};
cairo_xcb_connection_t *
_cairo_xcb_connection_get (xcb_connection_t *xcb_connection)
{
cairo_xcb_connection_t *connection;
const xcb_query_extension_reply_t *ext;
cairo_status_t status;
CAIRO_MUTEX_INITIALIZE ();
CAIRO_MUTEX_LOCK (_cairo_xcb_connections_mutex);
if (connections.next == NULL) {
/* XXX _cairo_init () */
cairo_list_init (&connections);
}
cairo_list_foreach_entry (connection,
cairo_xcb_connection_t,
&connections,
link)
{
if (connection->xcb_connection == xcb_connection) {
/* Maintain MRU order. */
if (connections.next != &connection->link)
cairo_list_move (&connection->link, &connections);
goto unlock;
}
}
connection = _cairo_malloc (sizeof (cairo_xcb_connection_t));
if (unlikely (connection == NULL))
goto unlock;
_cairo_device_init (&connection->device, &_cairo_xcb_device_backend);
connection->xcb_connection = xcb_connection;
cairo_list_init (&connection->fonts);
cairo_list_init (&connection->screens);
cairo_list_init (&connection->link);
connection->xrender_formats = _cairo_hash_table_create (NULL);
if (connection->xrender_formats == NULL) {
CAIRO_MUTEX_FINI (connection->device.mutex);
free (connection);
connection = NULL;
goto unlock;
}
connection->visual_to_xrender_format = _cairo_hash_table_create (NULL);
if (connection->visual_to_xrender_format == NULL) {
_cairo_hash_table_destroy (connection->xrender_formats);
CAIRO_MUTEX_FINI (connection->device.mutex);
free (connection);
connection = NULL;
goto unlock;
}
cairo_list_init (&connection->free_xids);
_cairo_freepool_init (&connection->xid_pool,
sizeof (cairo_xcb_xid_t));
cairo_list_init (&connection->shm_pools);
cairo_list_init (&connection->shm_pending);
_cairo_freepool_init (&connection->shm_info_freelist,
sizeof (cairo_xcb_shm_info_t));
connection->maximum_request_length =
xcb_get_maximum_request_length (xcb_connection);
CAIRO_MUTEX_INIT (connection->shm_mutex);
CAIRO_MUTEX_INIT (connection->screens_mutex);
CAIRO_MUTEX_LOCK (connection->device.mutex);
connection->flags = 0;
connection->force_precision = -1;
xcb_prefetch_extension_data (xcb_connection, &xcb_big_requests_id);
xcb_prefetch_extension_data (xcb_connection, &xcb_render_id);
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
xcb_prefetch_extension_data (xcb_connection, &xcb_shm_id);
#endif
#if 0
xcb_prefetch_extension_data (xcb_connection, &xcb_cairo_id);
#endif
xcb_prefetch_maximum_request_length (xcb_connection);
connection->root = xcb_get_setup (xcb_connection);
connection->render = NULL;
connection->subpixel_orders = calloc (connection->root->roots_len, sizeof(*connection->subpixel_orders));
if (unlikely (connection->subpixel_orders == NULL)) {
CAIRO_MUTEX_UNLOCK (connection->device.mutex);
_cairo_xcb_connection_destroy (connection);
connection = NULL;
goto unlock;
}
ext = xcb_get_extension_data (xcb_connection, &xcb_render_id);
if (ext != NULL && ext->present) {
status = _cairo_xcb_connection_query_render (connection);
if (unlikely (status)) {
CAIRO_MUTEX_UNLOCK (connection->device.mutex);
_cairo_xcb_connection_destroy (connection);
connection = NULL;
goto unlock;
}
connection->render = ext;
}
#if 0
ext = xcb_get_extension_data (connection, &xcb_cairo_id);
if (ext != NULL && ext->present)
_cairo_xcb_connection_query_cairo (connection);
#endif
connection->shm = NULL;
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
ext = xcb_get_extension_data (xcb_connection, &xcb_shm_id);
if (ext != NULL && ext->present) {
_cairo_xcb_connection_query_shm (connection);
connection->shm = ext;
}
#endif
connection->original_flags = connection->flags;
CAIRO_MUTEX_UNLOCK (connection->device.mutex);
cairo_list_add (&connection->link, &connections);
unlock:
CAIRO_MUTEX_UNLOCK (_cairo_xcb_connections_mutex);
return connection;
}
xcb_render_pictformat_t
_cairo_xcb_connection_get_xrender_format (cairo_xcb_connection_t *connection,
pixman_format_code_t pixman_format)
{
cairo_hash_entry_t key;
cairo_xcb_xrender_format_t *format;
key.hash = pixman_format;
format = _cairo_hash_table_lookup (connection->xrender_formats, &key);
return format ? format->xrender_format : XCB_NONE;
}
xcb_render_pictformat_t
_cairo_xcb_connection_get_xrender_format_for_visual (cairo_xcb_connection_t *connection,
const xcb_visualid_t visual)
{
cairo_hash_entry_t key;
cairo_xcb_xrender_format_t *format;
key.hash = visual;
format = _cairo_hash_table_lookup (connection->visual_to_xrender_format, &key);
return format ? format->xrender_format : XCB_NONE;
}
void
_cairo_xcb_connection_put_xid (cairo_xcb_connection_t *connection,
uint32_t xid)
{
cairo_xcb_xid_t *cache;
assert (CAIRO_MUTEX_IS_LOCKED (connection->device.mutex));
cache = _cairo_freepool_alloc (&connection->xid_pool);
if (likely (cache != NULL)) {
cache->xid = xid;
cairo_list_add (&cache->link, &connection->free_xids);
}
}
uint32_t
_cairo_xcb_connection_get_xid (cairo_xcb_connection_t *connection)
{
uint32_t xid;
assert (CAIRO_MUTEX_IS_LOCKED (connection->device.mutex));
if (! cairo_list_is_empty (&connection->free_xids)) {
cairo_xcb_xid_t *cache;
cache = cairo_list_first_entry (&connection->free_xids,
cairo_xcb_xid_t,
link);
xid = cache->xid;
cairo_list_del (&cache->link);
_cairo_freepool_free (&connection->xid_pool, cache);
} else {
xid = xcb_generate_id (connection->xcb_connection);
}
return xid;
}
/**
* cairo_xcb_device_get_connection:
* @device: a #cairo_device_t for the XCB backend
*
* Get the connection for the XCB device.
*
* Returns: the #xcb_connection_t for the connection
*
* Since: 1.12
**/
xcb_connection_t *
cairo_xcb_device_get_connection (cairo_device_t *device)
{
if (device->backend->type != CAIRO_DEVICE_TYPE_XCB)
return NULL;
return ((cairo_xcb_connection_t *)device)->xcb_connection;
}
/* public (debug) interface */
/**
* cairo_xcb_device_debug_cap_xshm_version:
* @device: a #cairo_device_t for the XCB backend
* @major_version: major version to restrict to
* @minor_version: minor version to restrict to
*
* Restricts all future XCB surfaces for this devices to the specified version
* of the SHM extension. This function exists solely for debugging purpose.
* It let's you find out how cairo would behave with an older version of
* the SHM extension.
*
* Use the special values -1 and -1 for disabling the SHM extension.
*
* Since: 1.12
**/
void
cairo_xcb_device_debug_cap_xshm_version (cairo_device_t *device,
int major_version,
int minor_version)
{
cairo_xcb_connection_t *connection = (cairo_xcb_connection_t *) device;
if (device->backend->type != CAIRO_DEVICE_TYPE_XCB) {
cairo_status_t status;
status = _cairo_device_set_error (device, CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
(void) status;
return;
}
/* First reset all the SHM flags to their original value. This works
* because we only ever clear bits after the connection was created.
*/
connection->flags |= (connection->original_flags & CAIRO_XCB_SHM_MASK);
/* clear any flags that are inappropriate for the desired version */
if (major_version < 0 && minor_version < 0) {
connection->flags &= ~(CAIRO_XCB_HAS_SHM);
}
}
/**
* cairo_xcb_device_debug_cap_xrender_version:
* @device: a #cairo_device_t for the XCB backend
* @major_version: major version to restrict to
* @minor_version: minor version to restrict to
*
* Restricts all future XCB surfaces for this devices to the specified version
* of the RENDER extension. This function exists solely for debugging purpose.
* It let's you find out how cairo would behave with an older version of
* the RENDER extension.
*
* Use the special values -1 and -1 for disabling the RENDER extension.
*
* Since: 1.12
**/
void
cairo_xcb_device_debug_cap_xrender_version (cairo_device_t *device,
int major_version,
int minor_version)
{
cairo_xcb_connection_t *connection = (cairo_xcb_connection_t *) device;
if (device->backend->type != CAIRO_DEVICE_TYPE_XCB) {
cairo_status_t status;
status = _cairo_device_set_error (device, CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
(void) status;
return;
}
/* First reset all the RENDER flags to their original value. This works
* because we only ever clear bits after the connection was created.
*/
connection->flags |= (connection->original_flags & CAIRO_XCB_RENDER_MASK);
/* clear any flags that are inappropriate for the desired version */
if (major_version < 0 && minor_version < 0) {
connection->flags &= ~(CAIRO_XCB_HAS_RENDER |
CAIRO_XCB_RENDER_HAS_COMPOSITE |
CAIRO_XCB_RENDER_HAS_COMPOSITE_GLYPHS |
CAIRO_XCB_RENDER_HAS_FILL_RECTANGLES |
CAIRO_XCB_RENDER_HAS_COMPOSITE_TRAPEZOIDS |
CAIRO_XCB_RENDER_HAS_PICTURE_TRANSFORM |
CAIRO_XCB_RENDER_HAS_FILTERS |
CAIRO_XCB_RENDER_HAS_FILTER_GOOD |
CAIRO_XCB_RENDER_HAS_FILTER_BEST |
CAIRO_XCB_RENDER_HAS_PDF_OPERATORS |
CAIRO_XCB_RENDER_HAS_EXTENDED_REPEAT |
CAIRO_XCB_RENDER_HAS_GRADIENTS);
} else {
xcb_render_query_version_reply_t version;
version.major_version = major_version;
version.minor_version = minor_version;
if (! XCB_RENDER_HAS_FILL_RECTANGLES (&version))
connection->flags &= ~CAIRO_XCB_RENDER_HAS_FILL_RECTANGLES;
if (! XCB_RENDER_HAS_TRAPEZOIDS (&version))
connection->flags &= ~CAIRO_XCB_RENDER_HAS_COMPOSITE_TRAPEZOIDS;
if (! XCB_RENDER_HAS_PICTURE_TRANSFORM (&version))
connection->flags &= ~CAIRO_XCB_RENDER_HAS_PICTURE_TRANSFORM;
if (! XCB_RENDER_HAS_FILTERS (&version))
connection->flags &= ~CAIRO_XCB_RENDER_HAS_FILTERS;
if (! XCB_RENDER_HAS_PDF_OPERATORS (&version))
connection->flags &= ~CAIRO_XCB_RENDER_HAS_PDF_OPERATORS;
if (! XCB_RENDER_HAS_EXTENDED_REPEAT (&version))
connection->flags &= ~CAIRO_XCB_RENDER_HAS_EXTENDED_REPEAT;
if (! XCB_RENDER_HAS_GRADIENTS (&version))
connection->flags &= ~CAIRO_XCB_RENDER_HAS_GRADIENTS;
}
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_device_debug_cap_xrender_version);
#endif
/**
* cairo_xcb_device_debug_set_precision:
* @device: a #cairo_device_t for the XCB backend
* @precision: the precision to use
*
* Render supports two modes of precision when rendering trapezoids. Set
* the precision to the desired mode.
*
* Since: 1.12
**/
void
cairo_xcb_device_debug_set_precision (cairo_device_t *device,
int precision)
{
if (device == NULL || device->status)
return;
if (device->backend->type != CAIRO_DEVICE_TYPE_XCB) {
cairo_status_t status;
status = _cairo_device_set_error (device, CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
(void) status;
return;
}
((cairo_xcb_connection_t *) device)->force_precision = precision;
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_device_debug_set_precision);
#endif
/**
* cairo_xcb_device_debug_get_precision:
* @device: a #cairo_device_t for the XCB backend
*
* Get the Xrender precision mode.
*
* Returns: the render precision mode
*
* Since: 1.12
**/
int
cairo_xcb_device_debug_get_precision (cairo_device_t *device)
{
if (device == NULL || device->status)
return -1;
if (device->backend->type != CAIRO_DEVICE_TYPE_XCB) {
cairo_status_t status;
status = _cairo_device_set_error (device, CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
(void) status;
return -1;
}
return ((cairo_xcb_connection_t *) device)->force_precision;
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_device_debug_get_precision);
#endif