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-rw-r--r--src/cairo-xcb-connection.c1006
1 files changed, 1006 insertions, 0 deletions
diff --git a/src/cairo-xcb-connection.c b/src/cairo-xcb-connection.c
new file mode 100644
index 000000000..67897fa4e
--- /dev/null
+++ b/src/cairo-xcb-connection.c
@@ -0,0 +1,1006 @@
+/* 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.
+ *
+ * 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 = 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 = 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 = 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