2006-05-29 08:59:36 +00:00
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/*
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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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#include "clutter-util.h"
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#include "clutter-main.h"
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2006-06-15 22:04:19 +00:00
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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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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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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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2006-05-29 08:59:36 +00:00
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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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#if 0
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gboolean
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clutter_util_can_create_texture (int width, int height)
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{
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GLint new_width;
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glTexImage2D (GL_PROXY_VIDEO_TEXTURE_2D, 0, GL_RGBA,
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width, height, 0 /* border */,
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GL_RGBA, PIXEL_TYPE, NULL);
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glGetTexLevelParameteriv (GL_PROXY_VIDEO_TEXTURE_2D, 0,
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GL_VIDEO_TEXTURE_WIDTH, &new_width);
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return new_width != 0;
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}
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#endif
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