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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Grayscale framework
* gray_screendump() 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"
static const unsigned char bmpheader[] =
{
0x42, 0x4d, 0xba, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xba, 0x00,
0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0x00, 0x40, 0x00,
0x00, 0x00, 0x01, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c,
0x00, 0x00, 0xc4, 0x0e, 0x00, 0x00, 0xc4, 0x0e, 0x00, 0x00, 0x21, 0x00,
0x00, 0x00, 0x21, 0x00, 0x00, 0x00
};
static unsigned char linebuf[LCD_WIDTH];
/*---------------------------------------------------------------------------
Save the current display content (b&w and grayscale overlay) to an 8-bit
BMP file in the root directory
----------------------------------------------------------------------------
*
* This one is rather slow if used with larger bit depths, but it's intended
* primary use is for documenting the grayscale plugins. A much faster version
* would be possible, but would take more than twice the RAM
*/
void gray_screendump(void)
{
int fh, i, bright;
int x, y, by, mask;
int gx, gby;
char filename[MAX_PATH];
struct tm *tm = _gray_rb->get_time();
unsigned char *lcdptr, *grayptr, *grayptr2;
_gray_rb->snprintf(filename, MAX_PATH,
"/graydump %04d-%02d-%02d %02d-%02d-%02d.bmp",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
fh = _gray_rb->creat(filename, O_WRONLY);
if (fh < 0)
return;
_gray_rb->write(fh, bmpheader, sizeof(bmpheader)); /* write header */
/* build clut, always 33 entries */
linebuf[3] = 0;
for (i = 0; i < 33; i++)
{
bright = MIN(i, _graybuf->depth);
linebuf[0] = linebuf[2] = MULU16(0x90, bright) / _graybuf->depth;
linebuf[1] = MULU16(0xee, bright) / _graybuf->depth;
_gray_rb->write(fh, linebuf, 4);
}
/* 8-bit BMP image goes bottom -> top */
for (y = LCD_HEIGHT - 1; y >= 0; y--)
{
_gray_rb->memset(linebuf, 32, sizeof(linebuf)); /* max. brightness */
mask = 1 << (y & 7);
by = y / 8;
lcdptr = _gray_rb->lcd_framebuffer + MULU16(LCD_WIDTH, by);
gby = by - _graybuf->by;
if ((_graybuf->flags & _GRAY_RUNNING)
&& (unsigned) gby < (unsigned) _graybuf->bheight)
{
/* line contains grayscale (and maybe b&w) graphics */
grayptr = _graybuf->data + MULU16(_graybuf->width, gby);
for (x = 0; x < LCD_WIDTH; x++)
{
if (*lcdptr++ & mask)
linebuf[x] = 0;
gx = x - _graybuf->x;
if ((unsigned) gx < (unsigned) _graybuf->width)
{
bright = 0;
grayptr2 = grayptr + gx;
for (i = 0; i < _graybuf->depth; i++)
{
if (!(*grayptr2 & mask))
bright++;
grayptr2 += _graybuf->plane_size;
}
linebuf[x] = bright;
}
}
}
else
{
/* line contains only b&w graphics */
for (x = 0; x < LCD_WIDTH; x++)
if (*lcdptr++ & mask)
linebuf[x] = 0;
}
_gray_rb->write(fh, linebuf, sizeof(linebuf));
}
_gray_rb->close(fh);
}
#endif // #ifdef HAVE_LCD_BITMAP
#endif // #ifndef SIMULATOR
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