0690ac1966
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4804 a1c6a512-1295-4272-9138-f99709370657
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Grayscale framework
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* gray_set_background() function
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*
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* This is a generic framework to use grayscale display within Rockbox
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* plugins. It obviously does not work for the player.
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*
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* Copyright (C) 2004 Jens Arnold
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef SIMULATOR /* not for simulator by now */
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#include "plugin.h"
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#ifdef HAVE_LCD_BITMAP /* and also not for the Player */
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#include "gray.h"
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/*---------------------------------------------------------------------------
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Set the background shade for subsequent drawing operations
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----------------------------------------------------------------------------
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brightness = 0 (black) .. 255 (white)
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Default after initialization: 255
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*/
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void gray_set_background(int brightness)
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{
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if ((unsigned) brightness <= 255)
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_graybuf->bg_pattern = _graybuf->bitpattern[MULU16(brightness,
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_graybuf->depth + 1) >> 8];
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}
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#endif // #ifdef HAVE_LCD_BITMAP
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#endif // #ifndef SIMULATOR
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