85890b88df
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4985 a1c6a512-1295-4272-9138-f99709370657
64 lines
2.1 KiB
C
64 lines
2.1 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_getstringsize() 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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Calculate width and height of the given text in pixels when rendered with
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the currently selected font.
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----------------------------------------------------------------------------
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This works exactly the same way as the core lcd_getstringsize(), only that
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it uses the selected font for grayscale.
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*/
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int gray_getstringsize(const unsigned char *str, int *w, int *h)
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{
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int ch;
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int width = 0;
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struct font *pf = _graybuf->curfont;
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while ((ch = *str++))
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{
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/* check input range */
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if (ch < pf->firstchar || ch >= pf->firstchar + pf->size)
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ch = pf->defaultchar;
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ch -= pf->firstchar;
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/* get proportional width */
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width += pf->width ? pf->width[ch] : pf->maxwidth;
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}
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if (w)
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*w = width;
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if (h)
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*h = pf->height;
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return width;
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}
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#endif // #ifdef HAVE_LCD_BITMAP
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#endif // #ifndef SIMULATOR
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