2004-06-23 22:15:50 +00:00
|
|
|
/***************************************************************************
|
|
|
|
|
* __________ __ ___.
|
|
|
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
|
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
|
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
|
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
|
|
|
* \/ \/ \/ \/ \/
|
|
|
|
|
* $Id$
|
|
|
|
|
*
|
|
|
|
|
* Grayscale framework
|
|
|
|
|
* gray_scroll_right() 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"
|
|
|
|
|
|
2005-02-04 08:35:29 +00:00
|
|
|
#if CONFIG_LCD == LCD_SSD1815 /* only for Recorder/Ondio */
|
2004-06-23 22:15:50 +00:00
|
|
|
#include "gray.h"
|
|
|
|
|
|
|
|
|
|
/*---------------------------------------------------------------------------
|
|
|
|
|
Scroll the whole grayscale buffer right by <count> pixels
|
|
|
|
|
----------------------------------------------------------------------------
|
|
|
|
|
black_border determines if the pixels scrolled in at the left are black
|
|
|
|
|
or white
|
|
|
|
|
|
|
|
|
|
Scrolling left/right by an even pixel count is almost twice as fast as
|
|
|
|
|
scrolling by an odd pixel count.
|
|
|
|
|
*/
|
|
|
|
|
void gray_scroll_right(int count, bool black_border)
|
|
|
|
|
{
|
|
|
|
|
int by, d;
|
|
|
|
|
unsigned filler;
|
|
|
|
|
unsigned char *ptr;
|
|
|
|
|
|
|
|
|
|
if ((unsigned) count >= (unsigned) _graybuf->width)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
filler = black_border ? 0xFF : 0;
|
|
|
|
|
|
|
|
|
|
/* Scroll row by row to minimize flicker (byte rows = 8 pixels each) */
|
|
|
|
|
for (by = 0; by < _graybuf->bheight; by++)
|
|
|
|
|
{
|
|
|
|
|
ptr = _graybuf->data + MULU16(_graybuf->width, by);
|
|
|
|
|
for (d = 0; d < _graybuf->depth; d++)
|
|
|
|
|
{
|
|
|
|
|
asm volatile (
|
|
|
|
|
"mov %0,r1 \n" /* check if both source... */
|
|
|
|
|
"or %2,r1 \n" /* ...and offset are even */
|
|
|
|
|
"shlr r1 \n" /* -> lsb = 0 */
|
|
|
|
|
"bf .sr_start2 \n" /* -> copy word-wise */
|
|
|
|
|
|
|
|
|
|
"add #-1,%2 \n" /* copy byte-wise */
|
|
|
|
|
".sr_loop1: \n"
|
|
|
|
|
"mov.b @(%2,%0),r1 \n"
|
|
|
|
|
"mov.b r1,@-%0 \n"
|
|
|
|
|
"cmp/hi %1,%0 \n"
|
|
|
|
|
"bt .sr_loop1 \n"
|
|
|
|
|
|
|
|
|
|
"bra .sr_end \n"
|
|
|
|
|
"nop \n"
|
|
|
|
|
|
|
|
|
|
".sr_start2: \n" /* copy word-wise */
|
|
|
|
|
"add #-2,%2 \n"
|
|
|
|
|
".sr_loop2: \n"
|
|
|
|
|
"mov.w @(%2,%0),r1 \n"
|
|
|
|
|
"mov.w r1,@-%0 \n"
|
|
|
|
|
"cmp/hi %1,%0 \n"
|
|
|
|
|
"bt .sr_loop2 \n"
|
|
|
|
|
|
|
|
|
|
".sr_end: \n"
|
|
|
|
|
: /* outputs */
|
|
|
|
|
: /* inputs */
|
|
|
|
|
/* %0 */ "r"(ptr + _graybuf->width),
|
|
|
|
|
/* %1 */ "r"(ptr + count),
|
|
|
|
|
/* %2 */ "z"(-count)
|
|
|
|
|
: /* clobbers */
|
|
|
|
|
"r1"
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
_gray_rb->memset(ptr, filler, count);
|
|
|
|
|
ptr += _graybuf->plane_size;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif // #ifdef HAVE_LCD_BITMAP
|
|
|
|
|
#endif // #ifndef SIMULATOR
|
|
|
|
|
|
