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rockbox/firmware/drivers/lcd-2bit-horz.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* LCD driver for horizontally-packed 2bpp greyscale display
*
* Based on code from the rockbox lcd's driver
*
* Copyright (c) 2006 Seven Le Mesle (sevlm@free.fr)
*
* 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 "config.h"
#include "cpu.h"
#include "lcd.h"
#include "kernel.h"
#include "thread.h"
#include <string.h>
#include <stdlib.h>
#include "file.h"
#include "debug.h"
#include "system.h"
#include "font.h"
#include "rbunicode.h"
#include "bidi.h"
#include "scroll_engine.h"
/*** globals ***/
unsigned char lcd_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH] IBSS_ATTR;
static const unsigned char pixmask[4] ICONST_ATTR = {
0xC0, 0x30, 0x0C, 0x03
};
static fb_data* lcd_backdrop = NULL;
static long lcd_backdrop_offset IDATA_ATTR = 0;
static struct viewport default_vp =
{
.x = 0,
.y = 0,
.width = LCD_WIDTH,
.height = LCD_HEIGHT,
.font = FONT_SYSFIXED,
.drawmode = DRMODE_SOLID,
.fg_pattern = LCD_DEFAULT_FG,
.bg_pattern = LCD_DEFAULT_BG
};
static struct viewport* current_vp IBSS_ATTR;
static unsigned fg_pattern IBSS_ATTR;
static unsigned bg_pattern IBSS_ATTR;
/* LCD init */
void lcd_init(void)
{
/* Initialise the viewport */
lcd_set_viewport(NULL);
lcd_clear_display();
/* Call device specific init */
lcd_init_device();
scroll_init();
}
/*** Viewports ***/
void lcd_set_viewport(struct viewport* vp)
{
if (vp == NULL)
current_vp = &default_vp;
else
current_vp = vp;
fg_pattern = 0x55 * (~current_vp->fg_pattern & 3);
bg_pattern = 0x55 * (~current_vp->bg_pattern & 3);
}
void lcd_update_viewport(void)
{
lcd_update_rect(current_vp->x, current_vp->y,
current_vp->width, current_vp->height);
}
void lcd_update_viewport_rect(int x, int y, int width, int height)
{
lcd_update_rect(current_vp->x + x, current_vp->y + y, width, height);
}
/*** parameter handling ***/
void lcd_set_drawmode(int mode)
{
current_vp->drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
}
int lcd_get_drawmode(void)
{
return current_vp->drawmode;
}
void lcd_set_foreground(unsigned brightness)
{
current_vp->fg_pattern = brightness;
fg_pattern = 0x55 * (~brightness & 3);
}
unsigned lcd_get_foreground(void)
{
return current_vp->fg_pattern;
}
void lcd_set_background(unsigned brightness)
{
current_vp->bg_pattern = brightness;
bg_pattern = 0x55 * (~brightness & 3);
}
unsigned lcd_get_background(void)
{
return current_vp->bg_pattern;
}
void lcd_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
{
lcd_set_drawmode(mode);
lcd_set_foreground(fg_brightness);
lcd_set_background(bg_brightness);
}
int lcd_getwidth(void)
{
return current_vp->width;
}
int lcd_getheight(void)
{
return current_vp->height;
}
void lcd_setfont(int newfont)
{
current_vp->font = newfont;
}
int lcd_getfont(void)
{
return current_vp->font;
}
int lcd_getstringsize(const unsigned char *str, int *w, int *h)
{
return font_getstringsize(str, w, h, current_vp->font);
}
/*** low-level drawing functions ***/
static void setpixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = &lcd_framebuffer[y][x>>2];
unsigned data = *address;
*address = data ^ ((data ^ fg_pattern) & mask);
}
static void clearpixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = &lcd_framebuffer[y][x>>2];
unsigned data = *address;
*address = data ^ ((data ^ bg_pattern) & mask);
}
static void clearimgpixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = &lcd_framebuffer[y][x>>2];
unsigned data = *address;
*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask);
}
static void flippixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = &lcd_framebuffer[y][x>>2];
*address ^= mask;
}
static void nopixel(int x, int y)
{
(void)x;
(void)y;
}
lcd_pixelfunc_type* const lcd_pixelfuncs_bgcolor[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearpixel, nopixel, clearpixel
};
lcd_pixelfunc_type* const lcd_pixelfuncs_backdrop[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearimgpixel, nopixel, clearimgpixel
};
lcd_pixelfunc_type* const * lcd_pixelfuncs = lcd_pixelfuncs_bgcolor;
/* 'mask' and 'bits' contain 2 bits per pixel */
static void ICODE_ATTR flipblock(fb_data *address, unsigned mask,
unsigned bits)
{
*address ^= bits & mask;
}
static void ICODE_ATTR bgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ bg_pattern) & mask & ~bits);
}
static void ICODE_ATTR bgimgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask & ~bits);
}
static void ICODE_ATTR fgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ fg_pattern) & mask & bits);
}
static void ICODE_ATTR solidblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned bgp = bg_pattern;
bits = bgp ^ ((bgp ^ fg_pattern) & bits);
*address = data ^ ((data ^ bits) & mask);
}
static void ICODE_ATTR solidimgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned bgp = *(address + lcd_backdrop_offset);
bits = bgp ^ ((bgp ^ fg_pattern) & bits);
*address = data ^ ((data ^ bits) & mask);
}
static void ICODE_ATTR flipinvblock(fb_data *address, unsigned mask,
unsigned bits)
{
*address ^= ~bits & mask;
}
static void ICODE_ATTR bginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ bg_pattern) & mask & bits);
}
static void ICODE_ATTR bgimginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask & bits);
}
static void ICODE_ATTR fginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ fg_pattern) & mask & ~bits);
}
static void ICODE_ATTR solidinvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned fgp = fg_pattern;
bits = fgp ^ ((fgp ^ bg_pattern) & bits);
*address = data ^ ((data ^ bits) & mask);
}
static void ICODE_ATTR solidimginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned fgp = fg_pattern;
bits = fgp ^ ((fgp ^ *(address + lcd_backdrop_offset)) & bits);
*address = data ^ ((data ^ bits) & mask);
}
lcd_blockfunc_type* const lcd_blockfuncs_bgcolor[8] = {
flipblock, bgblock, fgblock, solidblock,
flipinvblock, bginvblock, fginvblock, solidinvblock
};
lcd_blockfunc_type* const lcd_blockfuncs_backdrop[8] = {
flipblock, bgimgblock, fgblock, solidimgblock,
flipinvblock, bgimginvblock, fginvblock, solidimginvblock
};
lcd_blockfunc_type* const * lcd_blockfuncs = lcd_blockfuncs_bgcolor;
void lcd_set_backdrop(fb_data* backdrop)
{
lcd_backdrop = backdrop;
if (backdrop)
{
lcd_backdrop_offset = (long)backdrop - (long)lcd_framebuffer;
lcd_pixelfuncs = lcd_pixelfuncs_backdrop;
lcd_blockfuncs = lcd_blockfuncs_backdrop;
}
else
{
lcd_backdrop_offset = 0;
lcd_pixelfuncs = lcd_pixelfuncs_bgcolor;
lcd_blockfuncs = lcd_blockfuncs_bgcolor;
}
}
fb_data* lcd_get_backdrop(void)
{
return lcd_backdrop;
}
static inline void setblock(fb_data *address, unsigned mask, unsigned bits)
{
unsigned data = *address;
bits ^= data;
*address = data ^ (bits & mask);
}
/*** drawing functions ***/
/* Clear the whole display */
void lcd_clear_display(void)
{
if (current_vp->drawmode & DRMODE_INVERSEVID)
{
memset(lcd_framebuffer, fg_pattern, sizeof lcd_framebuffer);
}
else
{
if (lcd_backdrop)
memcpy(lcd_framebuffer, lcd_backdrop, sizeof lcd_framebuffer);
else
memset(lcd_framebuffer, bg_pattern, sizeof lcd_framebuffer);
}
lcd_scroll_info.lines = 0;
}
/* Clear the current viewport */
void lcd_clear_viewport(void)
{
int lastmode;
if (current_vp == &default_vp)
{
lcd_clear_display();
}
else
{
lastmode = current_vp->drawmode;
/* Invert the INVERSEVID bit and set basic mode to SOLID */
current_vp->drawmode = (~lastmode & DRMODE_INVERSEVID) |
DRMODE_SOLID;
lcd_fillrect(0, 0, current_vp->width, current_vp->height);
current_vp->drawmode = lastmode;
lcd_scroll_stop(current_vp);
}
}
/* Set a single pixel */
void lcd_drawpixel(int x, int y)
{
if (((unsigned)x < (unsigned)current_vp->width) &&
((unsigned)y < (unsigned)current_vp->height))
lcd_pixelfuncs[current_vp->drawmode](current_vp->x + x, current_vp->y + 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_pixelfunc_type *pfunc = lcd_pixelfuncs[current_vp->drawmode];
deltay = abs(y2 - y1);
if (deltay == 0)
{
DEBUGF("lcd_drawline() called for horizontal line - optimisation.\n");
lcd_hline(x1, x2, y1);
return;
}
deltax = abs(x2 - x1);
if (deltax == 0)
{
DEBUGF("lcd_drawline() called for vertical line - optimisation.\n");
lcd_vline(x1, y1, y2);
return;
}
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 < (unsigned)current_vp->width) &&
((unsigned)y < (unsigned)current_vp->height))
pfunc(current_vp->x + x, current_vp->y + 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 nx;
unsigned char *dst;
unsigned mask, mask_right;
lcd_blockfunc_type *bfunc;
/* direction flip */
if (x2 < x1)
{
nx = x1;
x1 = x2;
x2 = nx;
}
/* nothing to draw? */
if (((unsigned)y >= (unsigned)current_vp->height) || (x1 >= current_vp->width)
|| (x2 < 0))
return;
/* clipping */
if (x1 < 0)
x1 = 0;
if (x2 >= current_vp->width)
x2 = current_vp->width-1;
/* adjust to viewport */
x1 += current_vp->x;
x2 += current_vp->x;
y += current_vp->y;
bfunc = lcd_blockfuncs[current_vp->drawmode];
dst = &lcd_framebuffer[y][x1>>2];
nx = x2 - (x1 & ~3);
mask = 0xFFu >> (2 * (x1 & 3));
mask_right = 0xFFu << (2 * (~nx & 3));
for (; nx >= 4; nx -= 4)
{
bfunc(dst++, mask, 0xFFu);
mask = 0xFFu;
}
mask &= mask_right;
bfunc(dst, mask, 0xFFu);
}
/* Draw a vertical line (optimised) */
void lcd_vline(int x, int y1, int y2)
{
int y;
unsigned char *dst, *dst_end;
unsigned mask;
lcd_blockfunc_type *bfunc;
/* direction flip */
if (y2 < y1)
{
y = y1;
y1 = y2;
y2 = y;
}
/* nothing to draw? */
if (((unsigned)x >= (unsigned)current_vp->width) || (y1 >= current_vp->height)
|| (y2 < 0))
return;
/* clipping */
if (y1 < 0)
y1 = 0;
if (y2 >= current_vp->height)
y2 = current_vp->height-1;
/* adjust for viewport */
y1 += current_vp->y;
y2 += current_vp->y;
x += current_vp->x;
bfunc = lcd_blockfuncs[current_vp->drawmode];
dst = &lcd_framebuffer[y1][x>>2];
mask = pixmask[x & 3];
dst_end = dst + (y2 - y1) * LCD_FBWIDTH;
do
{
bfunc(dst, mask, 0xFFu);
dst += LCD_FBWIDTH;
}
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)
{
int nx;
unsigned char *dst, *dst_end;
unsigned mask, mask_right;
lcd_blockfunc_type *bfunc;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) || (y >= current_vp->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 > current_vp->width)
width = current_vp->width - x;
if (y + height > current_vp->height)
height = current_vp->height - y;
/* adjust for viewport */
x += current_vp->x;
y += current_vp->y;
bfunc = lcd_blockfuncs[current_vp->drawmode];
dst = &lcd_framebuffer[y][x>>2];
nx = width - 1 + (x & 3);
mask = 0xFFu >> (2 * (x & 3));
mask_right = 0xFFu << (2 * (~nx & 3));
for (; nx >= 4; nx -= 4)
{
unsigned char *dst_col = dst;
dst_end = dst_col + height * LCD_FBWIDTH;
do
{
bfunc(dst_col, mask, 0xFFu);
dst_col += LCD_FBWIDTH;
}
while (dst_col < dst_end);
dst++;
mask = 0xFFu;
}
mask &= mask_right;
dst_end = dst + height * LCD_FBWIDTH;
do
{
bfunc(dst, mask, 0xFFu);
dst += LCD_FBWIDTH;
}
while (dst < dst_end);
}
/* 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. */
/* Draw a partial monochrome bitmap */
void ICODE_ATTR 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;
fb_data *dst, *dst_end;
unsigned dmask = 0x100; /* bit 8 == sentinel */
unsigned dst_mask;
int drmode = current_vp->drawmode;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
(y >= current_vp->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 > current_vp->width)
width = current_vp->width - x;
if (y + height > current_vp->height)
height = current_vp->height - y;
src += stride * (src_y >> 3) + src_x; /* move starting point */
src_y &= 7;
src_end = src + width;
x += current_vp->x; /* adjust for viewport */
dst = &lcd_framebuffer[current_vp->y + y][x >> 2];
dst_end = dst + height * LCD_FBWIDTH;
dst_mask = pixmask[x & 3];
if (drmode & DRMODE_INVERSEVID)
{
dmask = 0x1ff; /* bit 8 == sentinel */
drmode &= DRMODE_SOLID; /* mask out inversevid */
}
do
{
const unsigned char *src_col = src++;
unsigned data = (*src_col ^ dmask) >> src_y;
fb_data *dst_col = dst;
int fg, bg;
long bo;
#define UPDATE_SRC do { \
data >>= 1; \
if (data == 0x001) { \
src_col += stride; \
data = *src_col ^ dmask; \
} \
} while (0)
switch (drmode)
{
case DRMODE_COMPLEMENT:
do
{
if (data & 0x01)
*dst_col ^= dst_mask;
dst_col += LCD_FBWIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
break;
case DRMODE_BG:
if (lcd_backdrop)
{
bo = lcd_backdrop_offset;
do
{
if (!(data & 0x01))
{
unsigned block = *dst_col;
*dst_col = block
^ ((block ^ *(dst_col + bo)) & dst_mask);
}
dst_col += LCD_FBWIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
else
{
bg = bg_pattern;
do
{
if (!(data & 0x01))
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ bg) & dst_mask);
}
dst_col += LCD_FBWIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
break;
case DRMODE_FG:
fg = fg_pattern;
do
{
if (data & 0x01)
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ fg) & dst_mask);
}
dst_col += LCD_FBWIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
break;
case DRMODE_SOLID:
fg = fg_pattern;
if (lcd_backdrop)
{
bo = lcd_backdrop_offset;
do
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ ((data & 0x01) ?
fg : *(dst_col + bo))) & dst_mask);
dst_col += LCD_FBWIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
else
{
bg = bg_pattern;
do
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ ((data & 0x01) ?
fg : bg)) & dst_mask);
dst_col += LCD_FBWIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
break;
}
dst_mask >>= 2;
if (dst_mask == 0)
{
dst++;
dst_mask = 0xC0;
}
}
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);
}
/* About Rockbox' internal native bitmap format:
*
* A bitmap contains two bits for every pixel. 00 = white, 01 = light grey,
* 10 = dark grey, 11 = black. Bits within a byte are arranged horizontally,
* MSB at the left.
* The bytes are stored in row-major order, with byte 0 being top left,
* byte 1 2nd from left etc. Each row of bytes defines one pixel row.
*
* This is the same as the internal lcd hw format. */
/* Draw a partial native bitmap */
void ICODE_ATTR lcd_bitmap_part(const unsigned char *src, int src_x,
int src_y, int stride, int x, int y,
int width, int height)
{
int shift, nx;
unsigned char *dst, *dst_end;
unsigned mask, mask_right;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
(y >= current_vp->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 > current_vp->width)
width = current_vp->width - x;
if (y + height > current_vp->height)
height = current_vp->height - y;
/* adjust for viewport */
x += current_vp->x;
y += current_vp->y;
stride = (stride + 3) >> 2; /* convert to no. of bytes */
src += stride * src_y + (src_x >> 2); /* move starting point */
src_x &= 3;
x -= src_x;
dst = &lcd_framebuffer[y][x>>2];
shift = x & 3;
nx = width - 1 + shift + src_x;
mask = 0xFF00u >> (2 * (shift + src_x));
mask_right = 0xFFu << (2 * (~nx & 3));
shift *= 2;
dst_end = dst + height * LCD_FBWIDTH;
do
{
const unsigned char *src_row = src;
unsigned char *dst_row = dst;
unsigned mask_row = mask >> 8;
unsigned data = 0;
for (x = nx; x >= 4; x -= 4)
{
data = (data << 8) | *src_row++;
if (mask_row & 0xFF)
{
setblock(dst_row, mask_row, data >> shift);
mask_row = 0xFF;
}
else
mask_row = mask;
dst_row++;
}
data = (data << 8) | *src_row;
setblock(dst_row, mask_row & mask_right, data >> shift);
src += stride;
dst += LCD_FBWIDTH;
}
while (dst < dst_end);
}
/* Draw a full native bitmap */
void lcd_bitmap(const unsigned char *src, int x, int y, int width, int height)
{
lcd_bitmap_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(current_vp->font);
ucs = bidi_l2v(str, 1);
while ((ch = *ucs++) != 0 && x < current_vp->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 = current_vp->drawmode;
/* make sure scrolling is turned off on the line we are updating */
lcd_scroll_stop_line(current_vp, y);
if(!str || !str[0])
return;
lcd_getstringsize(str, &w, &h);
xpos = x*w / utf8length((char *)str);
ypos = y*h;
current_vp->drawmode = (style & STYLE_INVERT) ?
(DRMODE_SOLID|DRMODE_INVERSEVID) : DRMODE_SOLID;
lcd_putsxyofs(xpos, ypos, offset, str);
current_vp->drawmode ^= DRMODE_INVERSEVID;
xrect = xpos + MAX(w - offset, 0);
lcd_fillrect(xrect, ypos, current_vp->width - xrect, h);
current_vp->drawmode = lastmode;
}
/*** 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 ((unsigned)y >= (unsigned)current_vp->height)
return;
/* remove any previously scrolling line at the same location */
lcd_scroll_stop_line(current_vp, y);
if (lcd_scroll_info.lines >= LCD_SCROLLABLE_LINES) return;
s = &lcd_scroll_info.scroll[lcd_scroll_info.lines];
s->start_tick = current_tick + lcd_scroll_info.delay;
s->style = style;
if (style & STYLE_INVERT) {
lcd_puts_style_offset(x,y,string,STYLE_INVERT,offset);
}
else
lcd_puts_offset(x,y,string,offset);
lcd_getstringsize(string, &w, &h);
if (current_vp->width - x * 8 < w) {
/* prepare scroll line */
char *end;
memset(s->line, 0, sizeof s->line);
strcpy(s->line, (char *)string);
/* get width */
s->width = lcd_getstringsize((unsigned char *)s->line, &w, &h);
/* scroll bidirectional or forward only depending on the string
width */
if ( lcd_scroll_info.bidir_limit ) {
s->bidir = s->width < (current_vp->width) *
(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((unsigned char *)s->line, &w, &h);
}
end = strchr(s->line, '\0');
strncpy(end, (char *)string, current_vp->width/2);
s->vp = current_vp;
s->y = y;
s->len = utf8length((char *)string);
s->offset = offset;
s->startx = x * s->width / s->len;
s->backward = false;
lcd_scroll_info.lines++;
}
}
void lcd_scroll_fn(void)
{
struct font* pf;
struct scrollinfo* s;
int index;
int xpos, ypos;
int lastmode;
struct viewport* old_vp = current_vp;
for ( index = 0; index < lcd_scroll_info.lines; index++ ) {
s = &lcd_scroll_info.scroll[index];
/* check pause */
if (TIME_BEFORE(current_tick, s->start_tick))
continue;
lcd_set_viewport(s->vp);
if (s->backward)
s->offset -= lcd_scroll_info.step;
else
s->offset += lcd_scroll_info.step;
pf = font_get(current_vp->font);
xpos = s->startx;
ypos = s->y * 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 - (current_vp->width - xpos)) {
/* at end of line */
s->offset = s->width - (current_vp->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 = current_vp->drawmode;
current_vp->drawmode = (s->style&STYLE_INVERT) ?
(DRMODE_SOLID|DRMODE_INVERSEVID) : DRMODE_SOLID;
lcd_putsxyofs(xpos, ypos, s->offset, s->line);
current_vp->drawmode = lastmode;
lcd_update_viewport_rect(xpos, ypos, current_vp->width - xpos, pf->height);
}
lcd_set_viewport(old_vp);
}
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