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rockbox/firmware/drivers/lcd-16bit.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Dave Chapman
*
* Rockbox driver for 16-bit colour LCDs
*
* 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.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "lcd.h"
#include "kernel.h"
#include "thread.h"
#include <string.h>
#include <stdlib.h>
#include "memory.h"
#include "file.h"
#include "debug.h"
#include "system.h"
#include "font.h"
#include "rbunicode.h"
#include "bidi.h"
#include "scroll_engine.h"
enum fill_opt {
OPT_NONE = 0,
OPT_SET,
OPT_COPY
};
/*** globals ***/
fb_data lcd_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH]
IRAM_LCDFRAMEBUFFER CACHEALIGN_AT_LEAST_ATTR(16);
static fb_data* lcd_backdrop = NULL;
static long lcd_backdrop_offset IDATA_ATTR = 0;
#if !defined(TOSHIBA_GIGABEAT_F) || defined(SIMULATOR)
static unsigned fg_pattern IDATA_ATTR = LCD_DEFAULT_FG;
static unsigned bg_pattern IDATA_ATTR = LCD_DEFAULT_BG;
static unsigned lss_pattern IDATA_ATTR = LCD_DEFAULT_LS;
static unsigned lse_pattern IDATA_ATTR = LCD_DEFAULT_BG;
static unsigned lst_pattern IDATA_ATTR = LCD_DEFAULT_FG;
#else
unsigned fg_pattern IDATA_ATTR = LCD_DEFAULT_FG;
unsigned bg_pattern IDATA_ATTR = LCD_DEFAULT_BG;
unsigned lss_pattern IDATA_ATTR = LCD_DEFAULT_LS;
unsigned lse_pattern IDATA_ATTR = LCD_DEFAULT_BG;
unsigned lst_pattern IDATA_ATTR = LCD_DEFAULT_FG;
#endif
static int drawmode = DRMODE_SOLID;
static int xmargin = 0;
static int ymargin = 0;
static int curfont = FONT_SYSFIXED;
/* LCD init */
void lcd_init(void)
{
lcd_clear_display();
/* Call device specific init */
lcd_init_device();
scroll_init();
}
/*** parameter handling ***/
void lcd_set_drawmode(int mode)
{
drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
}
int lcd_get_drawmode(void)
{
return drawmode;
}
void lcd_set_foreground(unsigned color)
{
fg_pattern = color;
}
unsigned lcd_get_foreground(void)
{
return fg_pattern;
}
void lcd_set_background(unsigned color)
{
bg_pattern = color;
}
unsigned lcd_get_background(void)
{
return bg_pattern;
}
void lcd_set_selector_start(unsigned color)
{
lss_pattern = color;
}
void lcd_set_selector_end(unsigned color)
{
lse_pattern = color;
}
void lcd_set_selector_text(unsigned color)
{
lst_pattern = color;
}
void lcd_set_drawinfo(int mode, unsigned fg_color, unsigned bg_color)
{
lcd_set_drawmode(mode);
fg_pattern = fg_color;
bg_pattern = bg_color;
}
void lcd_setmargins(int x, int y)
{
xmargin = x;
ymargin = y;
}
int lcd_getxmargin(void)
{
return xmargin;
}
int lcd_getymargin(void)
{
return ymargin;
}
void lcd_setfont(int newfont)
{
curfont = newfont;
}
int lcd_getstringsize(const unsigned char *str, int *w, int *h)
{
return font_getstringsize(str, w, h, curfont);
}
/*** low-level drawing functions ***/
#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
static void setpixel(fb_data *address) ICODE_ATTR;
static void setpixel(fb_data *address)
{
*address = fg_pattern;
}
static void clearpixel(fb_data *address) ICODE_ATTR;
static void clearpixel(fb_data *address)
{
*address = bg_pattern;
}
static void clearimgpixel(fb_data *address) ICODE_ATTR;
static void clearimgpixel(fb_data *address)
{
*address = *(fb_data *)((long)address + lcd_backdrop_offset);
}
static void flippixel(fb_data *address) ICODE_ATTR;
static void flippixel(fb_data *address)
{
*address = ~(*address);
}
static void nopixel(fb_data *address) ICODE_ATTR;
static void nopixel(fb_data *address)
{
(void)address;
}
lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_bgcolor[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearpixel, nopixel, clearpixel
};
lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_backdrop[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearimgpixel, nopixel, clearimgpixel
};
lcd_fastpixelfunc_type* const * lcd_fastpixelfuncs = lcd_fastpixelfuncs_bgcolor;
void lcd_set_backdrop(fb_data* backdrop)
{
lcd_backdrop = backdrop;
if (backdrop)
{
lcd_backdrop_offset = (long)backdrop - (long)&lcd_framebuffer[0][0];
lcd_fastpixelfuncs = lcd_fastpixelfuncs_backdrop;
}
else
{
lcd_backdrop_offset = 0;
lcd_fastpixelfuncs = lcd_fastpixelfuncs_bgcolor;
}
}
fb_data* lcd_get_backdrop(void)
{
return lcd_backdrop;
}
/*** drawing functions ***/
/* Clear the whole display */
void lcd_clear_display(void)
{
fb_data *dst = LCDADDR(0, 0);
if (drawmode & DRMODE_INVERSEVID)
{
memset16(dst, fg_pattern, LCD_WIDTH*LCD_HEIGHT);
}
else
{
if (!lcd_backdrop)
memset16(dst, bg_pattern, LCD_WIDTH*LCD_HEIGHT);
else
memcpy(dst, lcd_backdrop, sizeof(lcd_framebuffer));
}
lcd_scroll_info.lines = 0;
}
/* Set a single pixel */
void lcd_drawpixel(int x, int y)
{
if (((unsigned)x < LCD_WIDTH) && ((unsigned)y < LCD_HEIGHT))
lcd_fastpixelfuncs[drawmode](LCDADDR(x, y));
}
/* Draw a line */
void lcd_drawline(int x1, int y1, int x2, int y2)
{
int numpixels;
int i;
int deltax, deltay;
int d, dinc1, dinc2;
int x, xinc1, xinc2;
int y, yinc1, yinc2;
lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[drawmode];
deltax = abs(x2 - x1);
deltay = abs(y2 - y1);
xinc2 = 1;
yinc2 = 1;
if (deltax >= deltay)
{
numpixels = deltax;
d = 2 * deltay - deltax;
dinc1 = deltay * 2;
dinc2 = (deltay - deltax) * 2;
xinc1 = 1;
yinc1 = 0;
}
else
{
numpixels = deltay;
d = 2 * deltax - deltay;
dinc1 = deltax * 2;
dinc2 = (deltax - deltay) * 2;
xinc1 = 0;
yinc1 = 1;
}
numpixels++; /* include endpoints */
if (x1 > x2)
{
xinc1 = -xinc1;
xinc2 = -xinc2;
}
if (y1 > y2)
{
yinc1 = -yinc1;
yinc2 = -yinc2;
}
x = x1;
y = y1;
for (i = 0; i < numpixels; i++)
{
if (((unsigned)x < LCD_WIDTH) && ((unsigned)y < LCD_HEIGHT))
pfunc(LCDADDR(x, y));
if (d < 0)
{
d += dinc1;
x += xinc1;
y += yinc1;
}
else
{
d += dinc2;
x += xinc2;
y += yinc2;
}
}
}
/* Draw a horizontal line (optimised) */
void lcd_hline(int x1, int x2, int y)
{
int x, width;
unsigned bits = 0;
enum fill_opt fillopt = OPT_NONE;
fb_data *dst, *dst_end;
lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[drawmode];
/* direction flip */
if (x2 < x1)
{
x = x1;
x1 = x2;
x2 = x;
}
/* nothing to draw? */
if (((unsigned)y >= LCD_HEIGHT) || (x1 >= LCD_WIDTH) || (x2 < 0))
return;
/* clipping */
if (x1 < 0)
x1 = 0;
if (x2 >= LCD_WIDTH)
x2 = LCD_WIDTH-1;
if (drawmode & DRMODE_INVERSEVID)
{
if (drawmode & DRMODE_BG)
{
if (!lcd_backdrop)
{
fillopt = OPT_SET;
bits = bg_pattern;
}
else
fillopt = OPT_COPY;
}
}
else
{
if (drawmode & DRMODE_FG)
{
fillopt = OPT_SET;
bits = fg_pattern;
}
}
dst = LCDADDR(x1, y);
width = x2 - x1 + 1;
switch (fillopt)
{
case OPT_SET:
memset16(dst, bits, width);
break;
case OPT_COPY:
memcpy(dst, (void *)((long)dst + lcd_backdrop_offset),
width * sizeof(fb_data));
break;
case OPT_NONE:
dst_end = dst + width;
do
pfunc(dst++);
while (dst < dst_end);
break;
}
}
/* Draw a vertical line (optimised) */
void lcd_vline(int x, int y1, int y2)
{
int y;
fb_data *dst, *dst_end;
lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[drawmode];
/* direction flip */
if (y2 < y1)
{
y = y1;
y1 = y2;
y2 = y;
}
/* nothing to draw? */
if (((unsigned)x >= LCD_WIDTH) || (y1 >= LCD_HEIGHT) || (y2 < 0))
return;
/* clipping */
if (y1 < 0)
y1 = 0;
if (y2 >= LCD_HEIGHT)
y2 = LCD_HEIGHT-1;
dst = LCDADDR(x, y1);
dst_end = dst + (y2 - y1) * LCD_WIDTH;
do
{
pfunc(dst);
dst += LCD_WIDTH;
}
while (dst <= dst_end);
}
/* Draw a rectangular box */
void lcd_drawrect(int x, int y, int width, int height)
{
if ((width <= 0) || (height <= 0))
return;
int x2 = x + width - 1;
int y2 = y + height - 1;
lcd_vline(x, y, y2);
lcd_vline(x2, y, y2);
lcd_hline(x, x2, y);
lcd_hline(x, x2, y2);
}
/* Fill a rectangular area */
void lcd_fillrect(int x, int y, int width, int height)
{
unsigned bits = 0;
enum fill_opt fillopt = OPT_NONE;
fb_data *dst, *dst_end;
lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[drawmode];
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{
width += x;
x = 0;
}
if (y < 0)
{
height += y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
if (drawmode & DRMODE_INVERSEVID)
{
if (drawmode & DRMODE_BG)
{
if (!lcd_backdrop)
{
fillopt = OPT_SET;
bits = bg_pattern;
}
else
fillopt = OPT_COPY;
}
}
else
{
if (drawmode & DRMODE_FG)
{
fillopt = OPT_SET;
bits = fg_pattern;
}
}
dst = LCDADDR(x, y);
dst_end = dst + height * LCD_WIDTH;
do
{
fb_data *dst_row, *row_end;
switch (fillopt)
{
case OPT_SET:
memset16(dst, bits, width);
break;
case OPT_COPY:
memcpy(dst, (void *)((long)dst + lcd_backdrop_offset),
width * sizeof(fb_data));
break;
case OPT_NONE:
dst_row = dst;
row_end = dst_row + width;
do
pfunc(dst_row++);
while (dst_row < row_end);
break;
}
dst += LCD_WIDTH;
}
while (dst < dst_end);
}
/* Fill a rectangle with a gradient */
void lcd_gradient_rect(int x1, int x2, int y, int h)
{
if (h == 0) return;
int h_r = RGB_UNPACK_RED(lss_pattern) << 16;
int h_b = RGB_UNPACK_BLUE(lss_pattern) << 16;
int h_g = RGB_UNPACK_GREEN(lss_pattern) << 16;
int rstep = (h_r - ((signed)RGB_UNPACK_RED(lse_pattern) << 16)) / h;
int gstep = (h_g - ((signed)RGB_UNPACK_GREEN(lse_pattern) << 16)) / h;
int bstep = (h_b - ((signed)RGB_UNPACK_BLUE(lse_pattern) << 16)) / h;
int count;
fg_pattern = lss_pattern;
for(count = 0; count < h; count++) {
lcd_hline(x1, x2, y + count);
h_r -= rstep;
h_g -= gstep;
h_b -= bstep;
fg_pattern = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
}
}
/* About Rockbox' internal monochrome bitmap format:
*
* A bitmap contains one bit for every pixel that defines if that pixel is
* black (1) or white (0). Bits within a byte are arranged vertically, LSB
* at top.
* The bytes are stored in row-major order, with byte 0 being top left,
* byte 1 2nd from left etc. The first row of bytes defines pixel rows
* 0..7, the second row defines pixel row 8..15 etc.
*
* This is the mono bitmap format used on all other targets so far; the
* pixel packing doesn't really matter on a 8bit+ target. */
/* Draw a partial monochrome bitmap */
void lcd_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
int stride, int x, int y, int width, int height)
ICODE_ATTR;
void lcd_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
int stride, int x, int y, int width, int height)
{
const unsigned char *src_end;
bool has_backdrop;
fb_data *dst, *dst_end, *backdrop;
lcd_fastpixelfunc_type *fgfunc, *bgfunc;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
src += stride * (src_y >> 3) + src_x; /* move starting point */
src_y &= 7;
src_end = src + width;
dst = LCDADDR(x, y);
has_backdrop = (lcd_backdrop != NULL);
backdrop = lcd_backdrop + y * LCD_WIDTH + x;
fgfunc = lcd_fastpixelfuncs[drawmode];
bgfunc = lcd_fastpixelfuncs[drawmode ^ DRMODE_INVERSEVID];
do
{
const unsigned char *src_col = src++;
unsigned data = *src_col >> src_y;
fb_data *dst_col = dst++;
int numbits = 8 - src_y;
fb_data *backdrop_col = backdrop++;
dst_end = dst_col + height * LCD_WIDTH;
do
{
switch (drawmode)
{
case DRMODE_SOLID:
if (data & 0x01)
*dst_col = fg_pattern;
else
*dst_col = has_backdrop ? *backdrop_col : bg_pattern;
break;
case DRMODE_FG:
if (data & 0x01)
*dst_col = fg_pattern;
break;
case (DRMODE_SOLID|DRMODE_INVERSEVID):
if (data & 0x01)
*dst_col = has_backdrop ? *backdrop_col : bg_pattern;
else
*dst_col = fg_pattern;
break;
default:
if (data & 0x01)
fgfunc(dst_col);
else
bgfunc(dst_col);
break;
}
dst_col += LCD_WIDTH;
backdrop_col += LCD_WIDTH;
data >>= 1;
if (--numbits == 0)
{
src_col += stride;
data = *src_col;
numbits = 8;
}
}
while (dst_col < dst_end);
}
while (src < src_end);
}
/* Draw a full monochrome bitmap */
void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int height)
{
lcd_mono_bitmap_part(src, 0, 0, width, x, y, width, height);
}
/* Draw a partial native bitmap */
void lcd_bitmap_part(const fb_data *src, int src_x, int src_y,
int stride, int x, int y, int width, int height)
ICODE_ATTR;
void lcd_bitmap_part(const fb_data *src, int src_x, int src_y,
int stride, int x, int y, int width, int height)
{
fb_data *dst, *dst_end;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
src += stride * src_y + src_x; /* move starting point */
dst = LCDADDR(x, y);
dst_end = dst + height * LCD_WIDTH;
do
{
memcpy(dst, src, width * sizeof(fb_data));
src += stride;
dst += LCD_WIDTH;
}
while (dst < dst_end);
}
/* Draw a full native bitmap */
void lcd_bitmap(const fb_data *src, int x, int y, int width, int height)
{
lcd_bitmap_part(src, 0, 0, width, x, y, width, height);
}
#if !defined(TOSHIBA_GIGABEAT_F) && !defined(TOSHIBA_GIGABEAT_S) \
|| defined(SIMULATOR)
/* Draw a partial native bitmap */
void lcd_bitmap_transparent_part(const fb_data *src, int src_x, int src_y,
int stride, int x, int y, int width,
int height) ICODE_ATTR;
void lcd_bitmap_transparent_part(const fb_data *src, int src_x, int src_y,
int stride, int x, int y, int width,
int height)
{
fb_data *dst, *dst_end;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
src += stride * src_y + src_x; /* move starting point */
dst = LCDADDR(x, y);
dst_end = dst + height * LCD_WIDTH;
do
{
int i;
for(i = 0;i < width;i++)
{
if (src[i] == REPLACEWITHFG_COLOR)
dst[i] = fg_pattern;
else if(src[i] != TRANSPARENT_COLOR)
dst[i] = src[i];
}
src += stride;
dst += LCD_WIDTH;
}
while (dst < dst_end);
}
#endif /* !defined(TOSHIBA_GIGABEAT_F) || defined(SIMULATOR) */
/* Draw a full native bitmap with a transparent color */
void lcd_bitmap_transparent(const fb_data *src, int x, int y,
int width, int height)
{
lcd_bitmap_transparent_part(src, 0, 0, width, x, y, width, height);
}
/* put a string at a given pixel position, skipping first ofs pixel columns */
static void lcd_putsxyofs(int x, int y, int ofs, const unsigned char *str)
{
unsigned short ch;
unsigned short *ucs;
struct font* pf = font_get(curfont);
ucs = bidi_l2v(str, 1);
while ((ch = *ucs++) != 0 && x < LCD_WIDTH)
{
int width;
const unsigned char *bits;
/* get proportional width and glyph bits */
width = font_get_width(pf,ch);
if (ofs > width)
{
ofs -= width;
continue;
}
bits = font_get_bits(pf, ch);
lcd_mono_bitmap_part(bits, ofs, 0, width, x, y, width - ofs, pf->height);
x += width - ofs;
ofs = 0;
}
}
/* put a string at a given pixel position */
void lcd_putsxy(int x, int y, const unsigned char *str)
{
lcd_putsxyofs(x, y, 0, str);
}
/*** line oriented text output ***/
/* put a string at a given char position */
void lcd_puts(int x, int y, const unsigned char *str)
{
lcd_puts_style_offset(x, y, str, STYLE_DEFAULT, 0);
}
void lcd_puts_style(int x, int y, const unsigned char *str, int style)
{
lcd_puts_style_offset(x, y, str, style, 0);
}
void lcd_puts_offset(int x, int y, const unsigned char *str, int offset)
{
lcd_puts_style_offset(x, y, str, STYLE_DEFAULT, offset);
}
/* put a string at a given char position, style, and pixel position,
* skipping first offset pixel columns */
void lcd_puts_style_offset(int x, int y, const unsigned char *str, int style,
int offset)
{
int xpos,ypos,w,h,xrect;
int lastmode = drawmode;
int oldfgcolor = fg_pattern;
int oldbgcolor = bg_pattern;
/* make sure scrolling is turned off on the line we are updating */
lcd_scroll_info.lines &= ~(1 << y);
if(!str || !str[0])
return;
lcd_getstringsize(str, &w, &h);
xpos = xmargin + x*w / utf8length(str);
ypos = ymargin + y*h;
drawmode = (style & STYLE_INVERT) ?
(DRMODE_SOLID|DRMODE_INVERSEVID) : DRMODE_SOLID;
if (style & STYLE_COLORED) {
if (drawmode == DRMODE_SOLID)
fg_pattern = style & STYLE_COLOR_MASK;
else
bg_pattern = style & STYLE_COLOR_MASK;
}
drawmode ^= DRMODE_INVERSEVID;
xrect = xpos + MAX(w - offset, 0);
if (style & STYLE_GRADIENT) {
drawmode = DRMODE_FG;
lcd_gradient_rect(xpos, LCD_WIDTH, ypos, h*(style & STYLE_COLOR_MASK));
fg_pattern = lst_pattern;
}
else if (style & STYLE_COLORBAR) {
drawmode = DRMODE_FG;
fg_pattern = lss_pattern;
lcd_fillrect(xpos, ypos, LCD_WIDTH - xpos, h);
fg_pattern = lst_pattern;
}
else {
lcd_fillrect(xrect, ypos, LCD_WIDTH - xrect, h);
drawmode = (style & STYLE_INVERT) ?
(DRMODE_SOLID|DRMODE_INVERSEVID) : DRMODE_SOLID;
}
lcd_putsxyofs(xpos, ypos, offset, str);
drawmode = lastmode;
fg_pattern = oldfgcolor;
bg_pattern = oldbgcolor;
}
/*** scrolling ***/
void lcd_puts_scroll(int x, int y, const unsigned char *string)
{
lcd_puts_scroll_style(x, y, string, STYLE_DEFAULT);
}
void lcd_puts_scroll_style(int x, int y, const unsigned char *string, int style)
{
lcd_puts_scroll_style_offset(x, y, string, style, 0);
}
void lcd_puts_scroll_offset(int x, int y, const unsigned char *string, int offset)
{
lcd_puts_scroll_style_offset(x, y, string, STYLE_DEFAULT, offset);
}
void lcd_puts_scroll_style_offset(int x, int y, const unsigned char *string,
int style, int offset)
{
struct scrollinfo* s;
int w, h;
if(y>=LCD_SCROLLABLE_LINES) return;
s = &lcd_scroll_info.scroll[y];
s->start_tick = current_tick + lcd_scroll_info.delay;
s->style = style;
lcd_puts_style_offset(x,y,string,style,offset);
lcd_getstringsize(string, &w, &h);
if (LCD_WIDTH - x * 8 - xmargin < w) {
/* prepare scroll line */
char *end;
memset(s->line, 0, sizeof s->line);
strcpy(s->line, string);
/* get width */
s->width = lcd_getstringsize(s->line, &w, &h);
/* scroll bidirectional or forward only depending on the string
width */
if ( lcd_scroll_info.bidir_limit ) {
s->bidir = s->width < (LCD_WIDTH - xmargin) *
(100 + lcd_scroll_info.bidir_limit) / 100;
}
else
s->bidir = false;
if (!s->bidir) { /* add spaces if scrolling in the round */
strcat(s->line, " ");
/* get new width incl. spaces */
s->width = lcd_getstringsize(s->line, &w, &h);
}
end = strchr(s->line, '\0');
strncpy(end, string, LCD_WIDTH/2);
s->len = utf8length(string);
s->offset = offset;
s->startx = xmargin + x * s->width / s->len;
s->backward = false;
lcd_scroll_info.lines |= (1<<y);
}
else
/* force a bit switch-off since it doesn't scroll */
lcd_scroll_info.lines &= ~(1<<y);
}
void lcd_scroll_fn(void)
{
struct font* pf;
struct scrollinfo* s;
int index;
int xpos, ypos;
int lastmode;
unsigned old_fgcolor = fg_pattern;
unsigned old_bgcolor = bg_pattern;
for ( index = 0; index < LCD_SCROLLABLE_LINES; index++ ) {
/* really scroll? */
if ((lcd_scroll_info.lines & (1 << index)) == 0)
continue;
s = &lcd_scroll_info.scroll[index];
/* check pause */
if (TIME_BEFORE(current_tick, s->start_tick))
continue;
if (s->style&STYLE_COLORED) {
if (s->style&STYLE_MODE_MASK) {
fg_pattern = old_fgcolor;
bg_pattern = s->style&STYLE_COLOR_MASK;
}
else {
fg_pattern = s->style&STYLE_COLOR_MASK;
bg_pattern = old_bgcolor;
}
}
if (s->backward)
s->offset -= lcd_scroll_info.step;
else
s->offset += lcd_scroll_info.step;
pf = font_get(curfont);
xpos = s->startx;
ypos = ymargin + index * pf->height;
if (s->bidir) { /* scroll bidirectional */
if (s->offset <= 0) {
/* at beginning of line */
s->offset = 0;
s->backward = false;
s->start_tick = current_tick + lcd_scroll_info.delay * 2;
}
if (s->offset >= s->width - (LCD_WIDTH - xpos)) {
/* at end of line */
s->offset = s->width - (LCD_WIDTH - xpos);
s->backward = true;
s->start_tick = current_tick + lcd_scroll_info.delay * 2;
}
}
else {
/* scroll forward the whole time */
if (s->offset >= s->width)
s->offset %= s->width;
}
lastmode = drawmode;
switch (s->style&STYLE_MODE_MASK) {
case STYLE_INVERT:
drawmode = DRMODE_SOLID|DRMODE_INVERSEVID;
break;
case STYLE_COLORBAR:
/* Solid colour line selector */
drawmode = DRMODE_FG;
fg_pattern = lss_pattern;
lcd_fillrect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
fg_pattern = lst_pattern;
break;
case STYLE_GRADIENT:
/* Gradient line selector */
drawmode = DRMODE_FG;
lcd_gradient_rect(xpos, LCD_WIDTH, ypos, (signed)pf->height);
fg_pattern = lst_pattern;
break;
default:
drawmode = DRMODE_SOLID;
break;
}
lcd_putsxyofs(xpos, ypos, s->offset, s->line);
drawmode = lastmode;
lcd_update_rect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
}
fg_pattern = old_fgcolor;
bg_pattern = old_bgcolor;
}
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