mutter/cogl/winsys/cogl-xlib.c

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/*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <cogl.h>
#include <cogl-internal.h>
#include <cogl-handle.h>
#include <cogl-context.h>
#include <cogl-framebuffer-private.h>
#include <X11/Xlib.h>
#include "cogl-xlib.h"
/* This can't be in the Cogl context because it can be set before
context is created */
static Display *_cogl_xlib_display = NULL;
CoglXlibFilterReturn
_cogl_xlib_handle_event (XEvent *xevent)
{
GSList *l;
_COGL_GET_CONTEXT (ctx, COGL_XLIB_FILTER_CONTINUE);
/* Pass the event on to all of the registered filters in turn */
for (l = ctx->winsys.event_filters; l; l = l->next)
{
CoglXlibFilterClosure *closure = l->data;
if (closure->func (xevent, closure->data) == COGL_XLIB_FILTER_REMOVE)
return COGL_XLIB_FILTER_REMOVE;
}
switch (xevent->type)
{
/* TODO... */
default:
break;
}
return COGL_XLIB_FILTER_CONTINUE;
}
Display *
_cogl_xlib_get_display (void)
{
_COGL_GET_CONTEXT (ctx, NULL);
/* _cogl_xlib_set_display should be called before this function */
g_assert (_cogl_xlib_display != NULL);
return _cogl_xlib_display;
}
void
_cogl_xlib_set_display (Display *display)
{
/* This can only be called once before the Cogl context is created */
g_assert (_cogl_xlib_display == NULL);
_cogl_xlib_display = display;
}
void
_cogl_xlib_add_filter (CoglXlibFilterFunc func,
gpointer data)
{
CoglXlibFilterClosure *closure;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
closure = g_slice_new (CoglXlibFilterClosure);
closure->func = func;
closure->data = data;
ctx->winsys.event_filters =
g_slist_prepend (ctx->winsys.event_filters, closure);
}
void
_cogl_xlib_remove_filter (CoglXlibFilterFunc func,
gpointer data)
{
GSList *l, *prev = NULL;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
for (l = ctx->winsys.event_filters; l; prev = l, l = l->next)
{
CoglXlibFilterClosure *closure = l->data;
if (closure->func == func && closure->data == data)
{
g_slice_free (CoglXlibFilterClosure, closure);
if (prev)
prev->next = g_slist_delete_link (prev->next, l);
else
ctx->winsys.event_filters =
g_slist_delete_link (ctx->winsys.event_filters, l);
break;
}
}
}
static int
error_handler (Display *xdpy,
XErrorEvent *error)
{
_COGL_GET_CONTEXT (ctxt, 0);
g_assert (ctxt->winsys.trap_state);
ctxt->winsys.trap_state->trapped_error_code = error->error_code;
return 0;
}
void
_cogl_xlib_trap_errors (CoglXlibTrapState *state)
{
_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
state->trapped_error_code = 0;
state->old_error_handler = XSetErrorHandler (error_handler);
state->old_state = ctxt->winsys.trap_state;
ctxt->winsys.trap_state = state;
}
int
_cogl_xlib_untrap_errors (CoglXlibTrapState *state)
{
_COGL_GET_CONTEXT (ctxt, 0);
g_assert (state == ctxt->winsys.trap_state);
XSetErrorHandler (state->old_error_handler);
ctxt->winsys.trap_state = state->old_state;
return state->trapped_error_code;
}