mutter/cogl/winsys/cogl-context-winsys.c

153 lines
4.3 KiB
C
Raw Normal View History

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef COGL_HAS_GLX_SUPPORT
#include <GL/glx.h>
#endif
#include "cogl-context.h"
#include "cogl-feature-private.h"
/* Define a set of arrays containing the functions required from GL
for each winsys feature */
#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
feature_flags, feature_flags_private) \
static const CoglFeatureFunction \
cogl_winsys_feature_ ## name ## _funcs[] = {
#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args) \
{ G_STRINGIFY (name), G_STRUCT_OFFSET (CoglContext, winsys.pf_ ## name) },
#define COGL_WINSYS_FEATURE_END() \
{ NULL, 0 }, \
};
#include "cogl-winsys-feature-functions.h"
/* Define an array of features */
#undef COGL_WINSYS_FEATURE_BEGIN
#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
feature_flags, feature_flags_private) \
{ 255, 255, namespaces, extension_names, \
feature_flags, feature_flags_private, \
cogl_winsys_feature_ ## name ## _funcs },
#undef COGL_WINSYS_FEATURE_FUNCTION
#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args)
#undef COGL_WINSYS_FEATURE_END
#define COGL_WINSYS_FEATURE_END()
static const CoglFeatureData cogl_winsys_feature_data[] =
{
#include "cogl-winsys-feature-functions.h"
/* This stub is just here so that if the header is empty then we
won't end up declaring an empty array */
{ 0, }
};
#define COGL_WINSYS_N_FEATURES (G_N_ELEMENTS (cogl_winsys_feature_data) - 1)
static const char *
_cogl_get_winsys_extensions (void)
{
#ifdef COGL_HAS_GLX_SUPPORT
Display *display = _cogl_xlib_get_display ();
return glXQueryExtensionsString (display, DefaultScreen (display));
#else
return "";
#endif
}
static void
_cogl_winsys_features_init (CoglContext *context)
{
CoglWinsysFeatureFlags flags = 0;
const char *extensions = _cogl_get_winsys_extensions ();
int i;
for (i = 0; i < COGL_WINSYS_N_FEATURES; i++)
if (_cogl_feature_check ("GLX", cogl_winsys_feature_data + i, 0, 0,
extensions))
flags |= cogl_winsys_feature_data[i].feature_flags;
context->winsys.feature_flags = flags;
}
void
_cogl_create_context_winsys (CoglContext *context)
{
#ifdef COGL_HAS_XLIB_SUPPORT
{
Display *display = _cogl_xlib_get_display ();
int damage_error;
/* Check whether damage events are supported on this display */
if (!XDamageQueryExtension (display,
&context->winsys.damage_base,
&damage_error))
context->winsys.damage_base = -1;
context->winsys.event_filters = NULL;
context->winsys.trap_state = NULL;
}
#endif
#ifdef COGL_HAS_GLX_SUPPORT
{
int i;
for (i = 0; i < COGL_WINSYS_N_CACHED_CONFIGS; i++)
context->winsys.glx_cached_configs[i].depth = -1;
context->winsys.rectangle_state = COGL_WINSYS_RECTANGLE_STATE_UNKNOWN;
}
#endif
_cogl_winsys_features_init (context);
}
#ifdef COGL_HAS_XLIB_SUPPORT
#include "cogl-xlib.h"
static void
free_xlib_filter_closure (gpointer data, gpointer user_data)
{
g_slice_free (CoglXlibFilterClosure, data);
}
#endif
void
_cogl_destroy_context_winsys (CoglContext *context)
{
#ifdef COGL_HAS_XLIB_SUPPORT
g_slist_foreach (context->winsys.event_filters,
free_xlib_filter_closure, NULL);
g_slist_free (context->winsys.event_filters);
#endif
}