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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Scrolling routines
*
* 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
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#include "grey.h"
extern struct viewport _grey_default_vp;
/*** Scrolling ***/
/* Scroll left */
void grey_scroll_left(int count)
{
struct viewport *vp = &_grey_default_vp;
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_grey_info.width)
{
grey_clear_display();
return;
}
data = _grey_info.buffer;
data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
length = _grey_info.width - count;
blank = (vp->drawmode & DRMODE_INVERSEVID) ? vp->fg_pattern : vp->bg_pattern;
do
{
rb->memmove(data, data + count, length);
data += length;
rb->memset(data, blank, count);
data += count;
}
while (data < data_end);
}
/* Scroll right */
void grey_scroll_right(int count)
{
struct viewport *vp = &_grey_default_vp;
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_grey_info.width)
{
grey_clear_display();
return;
}
data = _grey_info.buffer;
data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
length = _grey_info.width - count;
blank = (vp->drawmode & DRMODE_INVERSEVID) ? vp->fg_pattern : vp->bg_pattern;
do
{
rb->memmove(data + count, data, length);
rb->memset(data, blank, count);
data += _grey_info.width;
}
while (data < data_end);
}
/* Scroll up */
void grey_scroll_up(int count)
{
struct viewport *vp = &_grey_default_vp;
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_grey_info.height)
{
grey_clear_display();
return;
}
shift = _GREY_MULUQ(_grey_info.width, count);
length = _GREY_MULUQ(_grey_info.width, _grey_info.height - count);
blank = (vp->drawmode & DRMODE_INVERSEVID) ? vp->fg_pattern : vp->bg_pattern;
rb->memmove(_grey_info.buffer, _grey_info.buffer + shift,
length);
rb->memset(_grey_info.buffer + length, blank, shift);
}
/* Scroll down */
void grey_scroll_down(int count)
{
struct viewport *vp = &_grey_default_vp;
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_grey_info.height)
{
grey_clear_display();
return;
}
shift = _GREY_MULUQ(_grey_info.width, count);
length = _GREY_MULUQ(_grey_info.width, _grey_info.height - count);
blank = (vp->drawmode & DRMODE_INVERSEVID) ? vp->fg_pattern : vp->bg_pattern;
rb->memmove(_grey_info.buffer + shift, _grey_info.buffer,
length);
rb->memset(_grey_info.buffer, blank, shift);
}
/*** Unbuffered scrolling functions ***/
/* Scroll left */
void grey_ub_scroll_left(int count)
{
struct viewport *vp = &_grey_default_vp;
unsigned char *data, *data_end;
int blank, length;
if ((unsigned)count >= (unsigned)_grey_info.width)
{
grey_ub_clear_display();
return;
}
data = _grey_info.values;
data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
length = (_grey_info.width - count) << _GREY_BSHIFT;
count <<= _GREY_BSHIFT;
blank = _grey_info.gvalue[(vp->drawmode & DRMODE_INVERSEVID) ?
vp->fg_pattern : vp->bg_pattern];
do
{
rb->memmove(data, data + count, length);
data += length;
rb->memset(data, blank, count);
data += count;
}
while (data < data_end);
#ifdef SIMULATOR
rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
_grey_info.width, _grey_info.height);
#endif
}
/* Scroll right */
void grey_ub_scroll_right(int count)
{
struct viewport *vp = &_grey_default_vp;
unsigned char *data, *data_end;
int blank, length;
if ((unsigned)count >= (unsigned)_grey_info.width)
{
grey_ub_clear_display();
return;
}
data = _grey_info.values;
data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
length = (_grey_info.width - count) << _GREY_BSHIFT;
count <<= _GREY_BSHIFT;
blank = _grey_info.gvalue[(vp->drawmode & DRMODE_INVERSEVID) ?
vp->fg_pattern : vp->bg_pattern];
do
{
rb->memmove(data + count, data, length);
rb->memset(data, blank, count);
data += _grey_info.width << _GREY_BSHIFT;
}
while (data < data_end);
#ifdef SIMULATOR
rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
_grey_info.width, _grey_info.height);
#endif
}
/* Scroll up */
void grey_ub_scroll_up(int count)
{
struct viewport *vp = &_grey_default_vp;
unsigned char *dst, *end, *src;
int blank;
if ((unsigned)count >= (unsigned)_grey_info.height)
{
grey_ub_clear_display();
return;
}
dst = _grey_info.values;
end = dst + _GREY_MULUQ(_grey_info.height, _grey_info.width);
blank = _grey_info.gvalue[(vp->drawmode & DRMODE_INVERSEVID) ?
vp->fg_pattern : vp->bg_pattern];
#if (LCD_PIXELFORMAT == VERTICAL_PACKING) \
|| (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
if (count & _GREY_BMASK)
{
/* Scrolling by fractional blocks - move pixel wise. */
unsigned char *line_end;
int ys, yd;
for (ys = count, yd = 0; ys < _grey_info.height; ys++, yd++)
{
dst = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, yd & ~_GREY_BMASK)
+ (~yd & _GREY_BMASK);
src = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, ys & ~_GREY_BMASK)
+ (~ys & _GREY_BMASK);
line_end = dst + _grey_info.width * _GREY_BSIZE;
do
{
*dst = *src;
dst += _GREY_BSIZE;
src += _GREY_BSIZE;
}
while (dst < line_end);
}
for (; yd & _GREY_BMASK; yd++) /* Fill remainder of current block. */
{
dst = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, yd & ~_GREY_BMASK)
+ (~yd & _GREY_BMASK);
line_end = dst + _grey_info.width * _GREY_BSIZE;
do
{
*dst = blank;
dst += _GREY_BSIZE;
}
while (dst < line_end);
}
}
else
#endif
{
int blen = _GREY_MULUQ(_grey_info.height - count, _grey_info.width);
src = dst + _GREY_MULUQ(count, _grey_info.width);
rb->memmove(dst, src, blen);
dst += blen;
}
rb->memset(dst, blank, end - dst); /* Fill remainder at once. */
#ifdef SIMULATOR
rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
_grey_info.width, _grey_info.height);
#endif
}
/* Scroll down */
void grey_ub_scroll_down(int count)
{
struct viewport *vp = &_grey_default_vp;
unsigned char *start, *dst;
int blank;
if ((unsigned)count >= (unsigned)_grey_info.height)
{
grey_ub_clear_display();
return;
}
start = _grey_info.values;
dst = start + _GREY_MULUQ(_grey_info.height, _grey_info.width);
blank = _grey_info.gvalue[(vp->drawmode & DRMODE_INVERSEVID) ?
vp->fg_pattern : vp->bg_pattern];
#if (LCD_PIXELFORMAT == VERTICAL_PACKING) \
|| (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
if (count & _GREY_BMASK)
{
/* Scrolling by fractional blocks - move pixel wise. */
unsigned char *src, *line_end;
int ys, yd;
yd = _grey_info.height - 1;
for (ys = yd - count; ys >= 0; ys--, yd--)
{
dst = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, yd & ~_GREY_BMASK)
+ (~yd & _GREY_BMASK);
src = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, ys & ~_GREY_BMASK)
+ (~ys & _GREY_BMASK);
line_end = dst + _grey_info.width * _GREY_BSIZE;
do
{
*dst = *src;
dst += _GREY_BSIZE;
src += _GREY_BSIZE;
}
while (dst < line_end);
}
for (; ~yd & _GREY_BMASK; yd--) /* Fill remainder of current block. */
{
dst = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, yd & ~_GREY_BMASK)
+ (~yd & _GREY_BMASK);
line_end = dst + _grey_info.width * _GREY_BSIZE;
do
{
line_end -= _GREY_BSIZE;
*line_end = blank;
}
while (dst < line_end);
}
/* Top pixel in a block has the highest address, but dst must point
* to the lowest address in that block for the subsequent fill. */
dst -= _GREY_BMASK;
}
else
#endif
{
int blen = _GREY_MULUQ(_grey_info.height - count, _grey_info.width);
dst -= blen;
rb->memmove(dst, start, blen);
}
rb->memset(start, blank, dst - start);
/* Fill remainder at once. */
#ifdef SIMULATOR
rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
_grey_info.width, _grey_info.height);
#endif
}
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