mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2025-12-29 17:20:13 +01:00
1236c41072
Still an experimental backend, it's now a little too late to stabilise for 1.10, but this should represent a major step forward in its feature set and an attempt to catch up with all the bug fixes that have been performed on xlib. Notably not tested yet (and expected to be broken) are mixed-endian connections and low bitdepth servers (the dithering support has not been copied over for instance). However, it seems robust enough for daily use... Of particular note in this update is that the xcb surface is now capable of subverting the xlib surface through the ./configure --enable-xlib-xcb option. This replaces the xlib surface with a proxy that forwards all operations to an equivalent xcb surface whilst preserving the cairo-xlib API that is required for compatibility with the existing applications, for instance GTK+ and Mozilla. Also you can experiment with enabling a DRM bypass, though you need to be extremely foolhardy to do so.
144 lines
4 KiB
C
144 lines
4 KiB
C
/*
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* Copyright © 2009 Chris Wilson
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Chris Wilson not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Chris Wilson makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Chris Wilson <chris@chris-wilson.co.uk>
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*/
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#include "cairo-test.h"
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#if CAIRO_HAS_XCB_SURFACE
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#include <cairo-xcb.h>
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#endif
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#include "surface-source.c"
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#if CAIRO_HAS_XCB_SURFACE
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static cairo_user_data_key_t closure_key;
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struct closure {
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cairo_device_t *device;
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xcb_connection_t *connection;
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xcb_pixmap_t pixmap;
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};
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static void
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cleanup (void *data)
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{
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struct closure *arg = data;
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cairo_device_finish (arg->device);
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cairo_device_destroy (arg->device);
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xcb_free_pixmap (arg->connection, arg->pixmap);
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xcb_disconnect (arg->connection);
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free (arg);
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}
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static xcb_render_pictforminfo_t *
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find_depth (xcb_connection_t *connection, int depth, void **formats_out)
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{
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xcb_render_query_pict_formats_reply_t *formats;
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xcb_render_query_pict_formats_cookie_t cookie;
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xcb_render_pictforminfo_iterator_t i;
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cookie = xcb_render_query_pict_formats (connection);
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xcb_flush (connection);
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formats = xcb_render_query_pict_formats_reply (connection, cookie, 0);
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if (formats == NULL)
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return NULL;
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for (i = xcb_render_query_pict_formats_formats_iterator (formats);
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i.rem;
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xcb_render_pictforminfo_next (&i))
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{
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if (XCB_RENDER_PICT_TYPE_DIRECT != i.data->type)
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continue;
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if (depth != i.data->depth)
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continue;
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*formats_out = formats;
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return i.data;
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}
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free (formats);
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return NULL;
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}
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#endif
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static cairo_surface_t *
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create_source_surface (int size)
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{
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#if CAIRO_HAS_XCB_SURFACE
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xcb_render_pictforminfo_t *render_format;
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struct closure *data;
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cairo_surface_t *surface;
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xcb_screen_t *root;
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xcb_void_cookie_t cookie;
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void *formats;
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data = xmalloc (sizeof (struct closure));
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data->connection = xcb_connect (NULL, NULL);
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render_format = find_depth (data->connection, 32, &formats);
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if (render_format == NULL) {
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xcb_disconnect (data->connection);
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free (data);
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return NULL;
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}
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root = xcb_setup_roots_iterator (xcb_get_setup (data->connection)).data;
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data->pixmap = xcb_generate_id (data->connection);
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cookie = xcb_create_pixmap_checked (data->connection, 32,
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data->pixmap, root->root, size, size);
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/* slow, but sure */
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if (xcb_request_check (data->connection, cookie) != NULL) {
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free (formats);
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xcb_disconnect (data->connection);
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free (data);
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return NULL;
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}
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surface = cairo_xcb_surface_create_with_xrender_format (data->connection,
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root,
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data->pixmap,
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render_format,
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size, size);
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free (formats);
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data->device = cairo_device_reference (cairo_surface_get_device (surface));
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cairo_surface_set_user_data (surface, &closure_key, data, cleanup);
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return surface;
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#else
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return NULL;
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#endif
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}
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CAIRO_TEST (xcb_surface_source,
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"Test using a XCB surface as the source",
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"source", /* keywords */
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NULL, /* requirements */
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SIZE, SIZE,
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preamble, draw)
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