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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Grayscale framework
* gray_getstringsize() function
*
* This is a generic framework to use grayscale display within Rockbox
* plugins. It obviously does not work for the player.
*
* Copyright (C) 2004 Jens Arnold
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef SIMULATOR /* not for simulator by now */
#include "plugin.h"
#ifdef HAVE_LCD_BITMAP /* and also not for the Player */
#include "gray.h"
/*---------------------------------------------------------------------------
Calculate width and height of the given text in pixels when rendered with
the currently selected font.
----------------------------------------------------------------------------
This works exactly the same way as the core lcd_getstringsize(), only that
it uses the selected font for grayscale.
*/
int gray_getstringsize(const unsigned char *str, int *w, int *h)
{
int ch;
int width = 0;
struct font *pf = _graybuf->curfont;
while ((ch = *str++))
{
/* check input range */
if (ch < pf->firstchar || ch >= pf->firstchar + pf->size)
ch = pf->defaultchar;
ch -= pf->firstchar;
/* get proportional width */
width += pf->width ? pf->width[ch] : pf->maxwidth;
}
if (w)
*w = width;
if (h)
*h = pf->height;
return width;
}
#endif // #ifdef HAVE_LCD_BITMAP
#endif // #ifndef SIMULATOR
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