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16c7d12e6c
This is similar to clutter_x11_{,un}trap_errors except that it stores the previous trap state in a caller-allocated struct so that it can be re-entrant. Make _cogl_xlib_trap_errors re-entrant (this will be squashed into an earlier commit)
171 lines
4.0 KiB
C
171 lines
4.0 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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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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#include <cogl.h>
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#include <cogl-internal.h>
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#include <cogl-handle.h>
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#include <cogl-context.h>
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#include <cogl-framebuffer-private.h>
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#include <X11/Xlib.h>
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#include "cogl-xlib.h"
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/* This can't be in the Cogl context because it can be set before
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context is created */
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static Display *_cogl_xlib_display = NULL;
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CoglXlibFilterReturn
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_cogl_xlib_handle_event (XEvent *xevent)
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{
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GSList *l;
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_COGL_GET_CONTEXT (ctx, COGL_XLIB_FILTER_CONTINUE);
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/* Pass the event on to all of the registered filters in turn */
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for (l = ctx->winsys.event_filters; l; l = l->next)
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{
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CoglXlibFilterClosure *closure = l->data;
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if (closure->func (xevent, closure->data) == COGL_XLIB_FILTER_REMOVE)
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return COGL_XLIB_FILTER_REMOVE;
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}
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switch (xevent->type)
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{
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/* TODO... */
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default:
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break;
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}
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return COGL_XLIB_FILTER_CONTINUE;
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}
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Display *
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_cogl_xlib_get_display (void)
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{
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_COGL_GET_CONTEXT (ctx, NULL);
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/* _cogl_xlib_set_display should be called before this function */
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g_assert (_cogl_xlib_display != NULL);
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return _cogl_xlib_display;
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}
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void
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_cogl_xlib_set_display (Display *display)
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{
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/* This can only be called once before the Cogl context is created */
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g_assert (_cogl_xlib_display == NULL);
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_cogl_xlib_display = display;
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}
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void
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_cogl_xlib_add_filter (CoglXlibFilterFunc func,
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gpointer data)
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{
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CoglXlibFilterClosure *closure;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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closure = g_slice_new (CoglXlibFilterClosure);
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closure->func = func;
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closure->data = data;
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ctx->winsys.event_filters =
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g_slist_prepend (ctx->winsys.event_filters, closure);
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}
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void
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_cogl_xlib_remove_filter (CoglXlibFilterFunc func,
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gpointer data)
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{
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GSList *l, *prev = NULL;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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for (l = ctx->winsys.event_filters; l; prev = l, l = l->next)
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{
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CoglXlibFilterClosure *closure = l->data;
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if (closure->func == func && closure->data == data)
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{
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g_slice_free (CoglXlibFilterClosure, closure);
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if (prev)
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prev->next = g_slist_delete_link (prev->next, l);
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else
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ctx->winsys.event_filters =
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g_slist_delete_link (ctx->winsys.event_filters, l);
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break;
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}
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}
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}
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static int
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error_handler (Display *xdpy,
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XErrorEvent *error)
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{
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_COGL_GET_CONTEXT (ctxt, 0);
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g_assert (ctxt->winsys.trap_state);
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ctxt->winsys.trap_state->trapped_error_code = error->error_code;
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return 0;
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}
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void
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_cogl_xlib_trap_errors (CoglXlibTrapState *state)
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{
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_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
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state->trapped_error_code = 0;
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state->old_error_handler = XSetErrorHandler (error_handler);
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state->old_state = ctxt->winsys.trap_state;
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ctxt->winsys.trap_state = state;
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}
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int
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_cogl_xlib_untrap_errors (CoglXlibTrapState *state)
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{
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_COGL_GET_CONTEXT (ctxt, 0);
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g_assert (state == ctxt->winsys.trap_state);
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XSetErrorHandler (state->old_error_handler);
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ctxt->winsys.trap_state = state->old_state;
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return state->trapped_error_code;
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}
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