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31b5beb2c0
This adds the framework needed to check for winsys specific extensions (such as GLX extensions) using a similar mechanism to the cogl-feature-functions header. There is a separate cogl-winsys-feature-functions header which will contain macros to list the extensions and functions. cogl_create_context_winsys now calls _cogl_feature_check for each of these functions. _cogl_feature_check has had to be changed to accept the driver prefix as the first parameter so that it can prepend "GLX" rather than "GL" in this case.
123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef COGL_HAS_GLX_SUPPORT
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#include <GL/glx.h>
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#endif
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#include "cogl-context.h"
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#include "cogl-feature-private.h"
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/* Define a set of arrays containing the functions required from GL
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for each winsys feature */
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#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
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feature_flags, feature_flags_private) \
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static const CoglFeatureFunction \
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cogl_winsys_feature_ ## name ## _funcs[] = {
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#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args) \
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{ G_STRINGIFY (name), G_STRUCT_OFFSET (CoglContext, winsys.pf_ ## name) },
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#define COGL_WINSYS_FEATURE_END() \
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{ NULL, 0 }, \
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};
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#include "cogl-winsys-feature-functions.h"
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/* Define an array of features */
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#undef COGL_WINSYS_FEATURE_BEGIN
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#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
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feature_flags, feature_flags_private) \
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{ 255, 255, namespaces, extension_names, \
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feature_flags, feature_flags_private, \
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cogl_winsys_feature_ ## name ## _funcs },
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#undef COGL_WINSYS_FEATURE_FUNCTION
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#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args)
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#undef COGL_WINSYS_FEATURE_END
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#define COGL_WINSYS_FEATURE_END()
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static const CoglFeatureData cogl_winsys_feature_data[] =
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{
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#include "cogl-winsys-feature-functions.h"
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};
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static const char *
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_cogl_get_winsys_extensions (void)
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{
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#ifdef COGL_HAS_GLX_SUPPORT
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Display *display = _cogl_xlib_get_display ();
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return glXQueryExtensionsString (display, DefaultScreen (display));
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#else
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return "";
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#endif
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}
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static void
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_cogl_winsys_features_init (CoglContext *context)
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{
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CoglWinsysFeatureFlags flags = 0;
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const char *extensions = _cogl_get_winsys_extensions ();
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int i;
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for (i = 0; i < G_N_ELEMENTS (cogl_winsys_feature_data); i++)
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if (_cogl_feature_check ("GLX", cogl_winsys_feature_data + i, 0, 0,
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extensions))
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flags |= cogl_winsys_feature_data[i].feature_flags;
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context->winsys.feature_flags = flags;
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}
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void
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_cogl_create_context_winsys (CoglContext *context)
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{
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#ifdef COGL_HAS_XLIB_SUPPORT
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context->winsys.event_filters = NULL;
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#endif
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_cogl_winsys_features_init (context);
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}
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#ifdef COGL_HAS_XLIB_SUPPORT
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#include "cogl-xlib.h"
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static void
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free_xlib_filter_closure (gpointer data, gpointer user_data)
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{
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g_slice_free (CoglXlibFilterClosure, data);
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}
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#endif
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void
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_cogl_destroy_context_winsys (CoglContext *context)
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{
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#ifdef COGL_HAS_XLIB_SUPPORT
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g_slist_foreach (context->winsys.event_filters,
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free_xlib_filter_closure, NULL);
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g_slist_free (context->winsys.event_filters);
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#endif
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}
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