734f808fbc
* clutter/clutter-alpha.h: * clutter/clutter-alpha.c: Add a data parameter to the ClutterAlphaFunc; add a data+destroy parameter to clutter_alpha_set_func() and to clutter_alpha_new(), and turned the latter into clutter_alpha_new_full(); add a simple, empty constructor clutter_alpha_new(). These changes makes writing bindings a tad more easy, as bindings require passing their own functions in order to call the real alpha function. * clutter/clutter-behaviour.h: Clean up the header. * clutter/clutter-behaviours.[ch]: * clutter/clutter-behaviour-opacity.[ch]: * clutter/clutter-behaviour-path.[ch]: * clutter/clutter-behaviour-scale.[ch]: Split the ClutterBehaviourPath, ClutterBehaviourOpacity and ClutterBehaviourScale into their own files as they have been growing a bit. Fix ClutterBehaviourPath API. * clutter/clutter-media.h: Remove the commented "metadata_available" signal: gtk-doc chokes up on that. * clutter/clutter-timeline.h: * clutter/clutter-timeline.c: Remove the useless ClutterTimelineAlphaFunc signature; add missing accessor methods for the properties; clean up a bit. * clutter/clutter-util.h: * clutter/clutter-util.c: Remove unneeded function clutter_util_can_create_texture(). * clutter/clutter-feature.h: Sync the name of clutter_feature_get_all() with the name declared in clutter-feature.h. * clutter/Makefile.am: * clutter/clutter.h: Update. * examples/behave.c: Update to the new ClutterAlpha constructor. * examples/super-oh.c: Use the right pointer and avoid the compiler making a fuss about it.
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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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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/**
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* SECTION:clutter-util
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* @short_description: Misc utility functions.
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*
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* Various misc utilility functions.
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*/
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#include "clutter-util.h"
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#include "clutter-main.h"
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static int TrappedErrorCode = 0;
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static int (*old_error_handler) (Display *, XErrorEvent *);
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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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TrappedErrorCode = error->error_code;
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return 0;
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}
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/**
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* clutter_util_trap_x_errors:
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*
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* Trap X errors so they don't cause an abort.
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*/
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void
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clutter_util_trap_x_errors(void)
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{
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TrappedErrorCode = 0;
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old_error_handler = XSetErrorHandler(error_handler);
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}
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/**
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* clutter_util_untrap_x_errors:
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*
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* Stop trapping X errors.
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*
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* Return value: 0 if there was no error, or the last X error that occurred.
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*/
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int
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clutter_util_untrap_x_errors(void)
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{
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XSetErrorHandler(old_error_handler);
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return TrappedErrorCode;
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}
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/**
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* clutter_util_next_p2:
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* @a: Value to get the next power
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*
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* Calculates the next power greater than @a.
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*
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* Return value: The next power after @a.
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*/
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int
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clutter_util_next_p2 (int a)
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{
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int rval=1;
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while(rval < a)
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rval <<= 1;
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return rval;
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}
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