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Complete rework of the grayscale library: (1) Implemented the new rockbox graphics api. (2) Added buffered mode, and implemented most drawing functions for buffered mode only. Buffered mode will ease implementation of animated graphics. Some functions are additionally provided as unbuffered versions (drawing grayscale bitmaps, scrolling) since unbuffered mode is better suited for non-animated graphics (JPEG viewer, mandelbrot) and saves some RAM, which is important on Archos. (3) Put all functions in a couple of source files, no more one-function-per-files. This became possible since sectioned compilation for the plugin library and appropriate linking for the pluginswas introduced, otherwise the binaries would be bloated by unused functions.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7241 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2005-07-25 20:50:34 +00:00
parent 12a4ed383f
commit c20a00ef3e
37 changed files with 2145 additions and 3328 deletions
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apps/plugins/lib/gray_scroll.c Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Greyscale framework
* Scrolling routines
*
* This is a generic framework to use grayscale display within Rockbox
* plugins. It obviously does not work for the player.
*
* Copyright (C) 2004-2005 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"
/* FIXME: intermediate solution until we have properly optimised memmove() */
static void *my_memmove(void *dst0, const void *src0, size_t len0)
{
char *dst = (char *) dst0;
char *src = (char *) src0;
if (dst <= src)
{
while (len0--)
*dst++ = *src++;
}
else
{
dst += len0;
src += len0;
while (len0--)
*(--dst) = *(--src);
}
return dst0;
}
/*** Scrolling ***/
/* Scroll left */
void gray_scroll_left(int count)
{
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_gray_info.width)
return;
shift = MULU16(_gray_info.height, count);
length = MULU16(_gray_info.height, _gray_info.width - count);
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_brightness : _gray_info.bg_brightness;
my_memmove(_gray_info.cur_buffer, _gray_info.cur_buffer + shift, length);
_gray_rb->memset(_gray_info.cur_buffer + length, blank, shift);
}
/* Scroll right */
void gray_scroll_right(int count)
{
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_gray_info.width)
return;
shift = MULU16(_gray_info.height, count);
length = MULU16(_gray_info.height, _gray_info.width - count);
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_brightness : _gray_info.bg_brightness;
my_memmove(_gray_info.cur_buffer + shift, _gray_info.cur_buffer, length);
_gray_rb->memset(_gray_info.cur_buffer, blank, shift);
}
/* Scroll up */
void gray_scroll_up(int count)
{
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_gray_info.height)
return;
data = _gray_info.cur_buffer;
data_end = data + MULU16(_gray_info.width, _gray_info.height);
length = _gray_info.height - count;
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_brightness : _gray_info.bg_brightness;
do
{
my_memmove(data, data + count, length);
_gray_rb->memset(data + length, blank, count);
data += _gray_info.height;
}
while (data < data_end);
}
/* Scroll down */
void gray_scroll_down(int count)
{
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_gray_info.height)
return;
data = _gray_info.cur_buffer;
data_end = data + MULU16(_gray_info.width, _gray_info.height);
length = _gray_info.height - count;
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_brightness : _gray_info.bg_brightness;
do
{
my_memmove(data + count, data, length);
_gray_rb->memset(data, blank, count);
data += _gray_info.height;
}
while (data < data_end);
}
/*** Unbuffered scrolling functions ***/
/* Scroll left */
void gray_ub_scroll_left(int count)
{
int length;
unsigned char *ptr, *ptr_end;
if ((unsigned) count >= (unsigned) _gray_info.width)
return;
length = _gray_info.width - count;
ptr = _gray_info.plane_data;
ptr_end = ptr + _gray_info.plane_size;
/* Scroll row by row to minimize flicker (pixel block rows) */
do
{
unsigned char *ptr_row = ptr;
unsigned char *row_end = ptr_row
+ MULU16(_gray_info.plane_size, _gray_info.depth);
do
{
my_memmove(ptr_row, ptr_row + count, length);
_gray_rb->memset(ptr_row + length, 0, count);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
ptr += _gray_info.width;
}
while (ptr < ptr_end);
}
/* Scroll right */
void gray_ub_scroll_right(int count)
{
int length;
unsigned char *ptr, *ptr_end;
if ((unsigned) count >= (unsigned) _gray_info.width)
return;
length = _gray_info.width - count;
ptr = _gray_info.plane_data;
ptr_end = ptr + _gray_info.plane_size;
/* Scroll row by row to minimize flicker (pixel block rows) */
do
{
unsigned char *ptr_row = ptr;
unsigned char *row_end = ptr_row
+ MULU16(_gray_info.plane_size, _gray_info.depth);
do
{
my_memmove(ptr_row + count, ptr_row, length);
_gray_rb->memset(ptr_row, 0, count);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
ptr += _gray_info.width;
}
while (ptr < ptr_end);
}
/* Scroll up */
void gray_ub_scroll_up(int count)
{
int shift;
long blockshift = 0;
unsigned char *ptr, *ptr_end1, *ptr_end2;
if ((unsigned) count >= (unsigned) _gray_info.height)
return;
shift = count >> _PBLOCK_EXP;
count &= (_PBLOCK-1);
if (shift)
{
blockshift = MULU16(_gray_info.width, shift);
ptr = _gray_info.plane_data;
ptr_end2 = ptr + _gray_info.plane_size;
ptr_end1 = ptr_end2 - blockshift;
/* Scroll row by row to minimize flicker (pixel block rows) */
do
{
unsigned char *ptr_row = ptr;
unsigned char *row_end = ptr_row
+ MULU16(_gray_info.plane_size, _gray_info.depth);
if (ptr < ptr_end1)
{
do
{
_gray_rb->memcpy(ptr_row, ptr_row + blockshift,
_gray_info.width);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
else
{
do
{
_gray_rb->memset(ptr_row, 0, _gray_info.width);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
ptr += _gray_info.width;
}
while (ptr < ptr_end2);
}
if (count)
{
#if (CONFIG_CPU == SH7034) && (LCD_DEPTH == 1)
/* scroll column by column to minimize flicker */
asm (
"mov #0,r6 \n" /* x = 0 */
"mova .su_shifttbl,r0 \n" /* calculate jump destination for */
"mov.b @(r0,%5),%5 \n" /* shift amount from table */
"bra .su_cloop \n" /* skip table */
"add r0,%5 \n"
".align 2 \n"
".su_shifttbl: \n" /* shift jump offset table */
".byte .su_shift0 - .su_shifttbl \n"
".byte .su_shift1 - .su_shifttbl \n"
".byte .su_shift2 - .su_shifttbl \n"
".byte .su_shift3 - .su_shifttbl \n"
".byte .su_shift4 - .su_shifttbl \n"
".byte .su_shift5 - .su_shifttbl \n"
".byte .su_shift6 - .su_shifttbl \n"
".byte .su_shift7 - .su_shifttbl \n"
".su_cloop: \n" /* repeat for every column */
"mov %1,r2 \n" /* get start address */
"mov #0,r3 \n" /* current_plane = 0 */
".su_oloop: \n" /* repeat for every bitplane */
"mov r2,r4 \n" /* get start address */
"mov #0,r5 \n" /* current_row = 0 */
"mov #0,r1 \n" /* fill with zero */
".su_iloop: \n" /* repeat for all rows */
"sub %2,r4 \n" /* address -= width */
"mov.b @r4,r0 \n" /* get data byte */
"shll8 r1 \n" /* old data to 2nd byte */
"extu.b r0,r0 \n" /* extend unsigned */
"or r1,r0 \n" /* combine old data */
"jmp @%5 \n" /* jump into shift "path" */
"extu.b r0,r1 \n" /* store data for next round */
".su_shift6: \n" /* shift right by 0..7 bits */
"shlr2 r0 \n"
".su_shift4: \n"
"shlr2 r0 \n"
".su_shift2: \n"
"bra .su_shift0 \n"
"shlr2 r0 \n"
".su_shift7: \n"
"shlr2 r0 \n"
".su_shift5: \n"
"shlr2 r0 \n"
".su_shift3: \n"
"shlr2 r0 \n"
".su_shift1: \n"
"shlr r0 \n"
".su_shift0: \n"
"mov.b r0,@r4 \n" /* store data */
"add #1,r5 \n" /* current_row++ */
"cmp/hi r5,%3 \n" /* current_row < bheight - shift ? */
"bt .su_iloop \n"
"add %4,r2 \n" /* start_address += plane_size */
"add #1,r3 \n" /* current_plane++ */
"cmp/hi r3,%0 \n" /* current_plane < depth ? */
"bt .su_oloop \n"
"add #1,%1 \n" /* start_address++ */
"add #1,r6 \n" /* x++ */
"cmp/hi r6,%2 \n" /* x < width ? */
"bt .su_cloop \n"
: /* outputs */
: /* inputs */
/* %0 */ "r"(_gray_info.depth),
/* %1 */ "r"(_gray_info.plane_data + _gray_info.plane_size - blockshift),
/* %2 */ "r"(_gray_info.width),
/* %3 */ "r"(_gray_info.bheight - shift),
/* %4 */ "r"(_gray_info.plane_size),
/* %5 */ "r"(count)
: /* clobbers */
"r0", "r1", "r2", "r3", "r4", "r5", "r6"
);
#endif
}
}
/* Scroll down */
void gray_ub_scroll_down(int count)
{
int shift;
long blockshift = 0;
unsigned char *ptr, *ptr_end1, *ptr_end2;
if ((unsigned) count >= (unsigned) _gray_info.height)
return;
shift = count >> _PBLOCK_EXP;
count &= (_PBLOCK-1);
if (shift)
{
blockshift = MULU16(_gray_info.width, shift);
ptr_end2 = _gray_info.plane_data;
ptr_end1 = ptr_end2 + blockshift;
ptr = ptr_end2 + _gray_info.plane_size;
/* Scroll row by row to minimize flicker (pixel block rows) */
do
{
unsigned char *ptr_row, *row_end;
ptr -= _gray_info.width;
ptr_row = ptr;
row_end = ptr_row + MULU16(_gray_info.plane_size, _gray_info.depth);
if (ptr >= ptr_end1)
{
do
{
_gray_rb->memcpy(ptr_row, ptr_row - blockshift,
_gray_info.width);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
else
{
do
{
_gray_rb->memset(ptr_row, 0, _gray_info.width);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
}
while (ptr > ptr_end2);
}
if (count)
{
#if (CONFIG_CPU == SH7034) && (LCD_DEPTH == 1)
/* scroll column by column to minimize flicker */
asm (
"mov #0,r6 \n" /* x = 0 */
"mova .sd_shifttbl,r0 \n" /* calculate jump destination for */
"mov.b @(r0,%5),%5 \n" /* shift amount from table */
"bra .sd_cloop \n" /* skip table */
"add r0,%5 \n"
".align 2 \n"
".sd_shifttbl: \n" /* shift jump offset table */
".byte .sd_shift0 - .sd_shifttbl \n"
".byte .sd_shift1 - .sd_shifttbl \n"
".byte .sd_shift2 - .sd_shifttbl \n"
".byte .sd_shift3 - .sd_shifttbl \n"
".byte .sd_shift4 - .sd_shifttbl \n"
".byte .sd_shift5 - .sd_shifttbl \n"
".byte .sd_shift6 - .sd_shifttbl \n"
".byte .sd_shift7 - .sd_shifttbl \n"
".sd_cloop: \n" /* repeat for every column */
"mov %1,r2 \n" /* get start address */
"mov #0,r3 \n" /* current_plane = 0 */
".sd_oloop: \n" /* repeat for every bitplane */
"mov r2,r4 \n" /* get start address */
"mov #0,r5 \n" /* current_row = 0 */
"mov #0,r1 \n" /* fill with zero */
".sd_iloop: \n" /* repeat for all rows */
"shlr8 r1 \n" /* shift right to get residue */
"mov.b @r4,r0 \n" /* get data byte */
"jmp @%5 \n" /* jump into shift "path" */
"extu.b r0,r0 \n" /* extend unsigned */
".sd_shift6: \n" /* shift left by 0..7 bits */
"shll2 r0 \n"
".sd_shift4: \n"
"shll2 r0 \n"
".sd_shift2: \n"
"bra .sd_shift0 \n"
"shll2 r0 \n"
".sd_shift7: \n"
"shll2 r0 \n"
".sd_shift5: \n"
"shll2 r0 \n"
".sd_shift3: \n"
"shll2 r0 \n"
".sd_shift1: \n"
"shll r0 \n"
".sd_shift0: \n"
"or r0,r1 \n" /* combine with last residue */
"mov.b r1,@r4 \n" /* store data */
"add %2,r4 \n" /* address += width */
"add #1,r5 \n" /* current_row++ */
"cmp/hi r5,%3 \n" /* current_row < bheight - shift ? */
"bt .sd_iloop \n"
"add %4,r2 \n" /* start_address += plane_size */
"add #1,r3 \n" /* current_plane++ */
"cmp/hi r3,%0 \n" /* current_plane < depth ? */
"bt .sd_oloop \n"
"add #1,%1 \n" /* start_address++ */
"add #1,r6 \n" /* x++ */
"cmp/hi r6,%2 \n" /* x < width ? */
"bt .sd_cloop \n"
: /* outputs */
: /* inputs */
/* %0 */ "r"(_gray_info.depth),
/* %1 */ "r"(_gray_info.plane_data + blockshift),
/* %2 */ "r"(_gray_info.width),
/* %3 */ "r"(_gray_info.bheight - shift),
/* %4 */ "r"(_gray_info.plane_size),
/* %5 */ "r"(count)
: /* clobbers */
"r0", "r1", "r2", "r3", "r4", "r5", "r6"
);
#endif
}
}
#endif /* HAVE_LCD_BITMAP */
#endif /* !SIMULATOR */