85890b88df
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4985 a1c6a512-1295-4272-9138-f99709370657
141 lines
4.6 KiB
C
141 lines
4.6 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_screendump() 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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static const unsigned char bmpheader[] =
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{
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0x42, 0x4d, 0xba, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xba, 0x00,
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0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0x00, 0x40, 0x00,
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0x00, 0x00, 0x01, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c,
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0x00, 0x00, 0xc4, 0x0e, 0x00, 0x00, 0xc4, 0x0e, 0x00, 0x00, 0x21, 0x00,
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0x00, 0x00, 0x21, 0x00, 0x00, 0x00
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};
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static unsigned char linebuf[LCD_WIDTH];
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/*---------------------------------------------------------------------------
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Save the current display content (b&w and grayscale overlay) to an 8-bit
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BMP file in the root directory
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----------------------------------------------------------------------------
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*
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* This one is rather slow if used with larger bit depths, but it's intended
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* primary use is for documenting the grayscale plugins. A much faster version
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* would be possible, but would take more than twice the RAM
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*/
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void gray_screendump(void)
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{
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int fh, i, bright;
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int x, y, by, mask;
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int gx, gby;
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char filename[MAX_PATH];
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struct tm *tm = _gray_rb->get_time();
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unsigned char *lcdptr, *grayptr, *grayptr2;
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_gray_rb->snprintf(filename, MAX_PATH,
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"/graydump %04d-%02d-%02d %02d-%02d-%02d.bmp",
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tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec);
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fh = _gray_rb->creat(filename, O_WRONLY);
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if (fh < 0)
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return;
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_gray_rb->write(fh, bmpheader, sizeof(bmpheader)); /* write header */
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/* build clut, always 33 entries */
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linebuf[3] = 0;
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for (i = 0; i < 33; i++)
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{
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bright = MIN(i, _graybuf->depth);
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linebuf[0] = linebuf[2] = MULU16(0x90, bright) / _graybuf->depth;
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linebuf[1] = MULU16(0xee, bright) / _graybuf->depth;
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_gray_rb->write(fh, linebuf, 4);
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}
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/* 8-bit BMP image goes bottom -> top */
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for (y = LCD_HEIGHT - 1; y >= 0; y--)
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{
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_gray_rb->memset(linebuf, 32, sizeof(linebuf)); /* max. brightness */
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mask = 1 << (y & 7);
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by = y / 8;
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lcdptr = _gray_rb->lcd_framebuffer + MULU16(LCD_WIDTH, by);
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gby = by - _graybuf->by;
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if ((_graybuf->flags & _GRAY_RUNNING)
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&& (unsigned) gby < (unsigned) _graybuf->bheight)
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{
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/* line contains grayscale (and maybe b&w) graphics */
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grayptr = _graybuf->data + MULU16(_graybuf->width, gby);
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for (x = 0; x < LCD_WIDTH; x++)
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{
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if (*lcdptr++ & mask)
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linebuf[x] = 0;
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gx = x - _graybuf->x;
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if ((unsigned) gx < (unsigned) _graybuf->width)
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{
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bright = 0;
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grayptr2 = grayptr + gx;
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for (i = 0; i < _graybuf->depth; i++)
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{
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if (!(*grayptr2 & mask))
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bright++;
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grayptr2 += _graybuf->plane_size;
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}
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linebuf[x] = bright;
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}
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}
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}
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else
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{
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/* line contains only b&w graphics */
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for (x = 0; x < LCD_WIDTH; x++)
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if (*lcdptr++ & mask)
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linebuf[x] = 0;
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}
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_gray_rb->write(fh, linebuf, sizeof(linebuf));
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}
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_gray_rb->close(fh);
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}
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#endif // #ifdef HAVE_LCD_BITMAP
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#endif // #ifndef SIMULATOR
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