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All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-01-04 23:42:38 +00:00
parent d3586837fa
commit feb5b15e9b
35 changed files with 2872 additions and 357 deletions
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apps/plugins/lib/grey_parm.c Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Parameter handling
*
* This is a generic framework to display 129 shades of grey on low-depth
* bitmap LCDs (Archos b&w, Iriver & Ipod 4-grey) within plugins.
*
* Copyright (C) 2008 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.
*
****************************************************************************/
#include "plugin.h"
#include "grey.h"
/* Set position of the top left corner of the greyscale overlay
Note that depending on the target LCD, either x or y gets rounded
to the nearest multiple of 4 or 8 */
void grey_set_position(int x, int y)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_grey_info.bx = (x + 4) >> 3;
x = 8 * _grey_info.bx;
#else
#if LCD_DEPTH == 1
_grey_info.by = (y + 4) >> 3;
y = 8 * _grey_info.by;
#elif LCD_DEPTH == 2
_grey_info.by = (y + 2) >> 2;
y = 4 * _grey_info.by;
#endif
#endif /* LCD_PIXELFORMAT */
_grey_info.x = x;
_grey_info.y = y;
if (_grey_info.flags & _GREY_RUNNING)
{
#ifdef SIMULATOR
grey_deferred_lcd_update();
grey_update();
#else
_grey_info.flags |= _GREY_DEFERRED_UPDATE;
#endif
}
}
/* Set the draw mode for subsequent drawing operations */
void grey_set_drawmode(int mode)
{
_grey_info.drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
}
/* Return the current draw mode */
int grey_get_drawmode(void)
{
return _grey_info.drawmode;
}
/* Set the foreground shade for subsequent drawing operations */
void grey_set_foreground(unsigned brightness)
{
_grey_info.fg_val = _grey_info.gvalue[brightness];
_grey_info.fg_brightness = brightness;
}
/* Return the current foreground shade */
unsigned grey_get_foreground(void)
{
return _grey_info.fg_brightness;
}
/* Set the background shade for subsequent drawing operations */
void grey_set_background(unsigned brightness)
{
_grey_info.bg_val = _grey_info.gvalue[brightness];
_grey_info.bg_brightness = brightness;
}
/* Return the current background shade */
unsigned grey_get_background(void)
{
return _grey_info.bg_brightness;
}
/* Set draw mode, foreground and background shades at once */
void grey_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
{
grey_set_drawmode(mode);
grey_set_foreground(fg_brightness);
grey_set_background(bg_brightness);
}
/* Set font for the text output routines */
void grey_setfont(int newfont)
{
_grey_info.curfont = newfont;
}
/* Get width and height of a text when printed with the current font */
int grey_getstringsize(const unsigned char *str, int *w, int *h)
{
return _grey_rb->font_getstringsize(str, w, h, _grey_info.curfont);
}