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First step of charcell LCD code rework: * Make it fully unicode aware so that adding non-ISO8859-1 scripts becomes possible (limited by the LCD capabilities of course). * Make the API more similar to the bitmap LCD code's API. * Moved hardware dependent parts to target tree. * Simplified code. * Jumpscroll temporarily non-functional.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12916 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2007-03-26 07:52:13 +00:00
parent 165f62d0cd
commit ad4e3d6657
26 changed files with 1652 additions and 1806 deletions
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firmware/drivers/lcd-charcell.c Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Jens Arnold
* Based on the work of Alan Korr, Kjell Ericson and others
*
* 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 "hwcompat.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 "lcd-charcell.h"
#include "rbunicode.h"
/** definitions **/
#define SCROLLABLE_LINES LCD_HEIGHT
#define VARIABLE_XCHARS 16 /* number of software user-definable characters */
#define NO_PATTERN (-1)
#define SCROLL_MODE_OFF 0
#define SCROLL_MODE_RUN 1
/* track usage of user-definable characters */
struct pattern_info {
short count;
unsigned short xchar;
};
struct cursor_info {
unsigned char hw_char;
bool enabled;
bool visible;
int x;
int y;
int divider;
int downcount;
};
static int find_xchar(unsigned long ucs);
/** globals **/
/* The "frame"buffer */
static unsigned char lcd_buffer[LCD_WIDTH][LCD_HEIGHT];
#ifdef SIMULATOR
unsigned char hardware_buffer_lcd[LCD_WIDTH][LCD_HEIGHT];
#endif
static int xmargin = 0;
static int ymargin = 0;
static unsigned char xfont_variable[VARIABLE_XCHARS][(HW_PATTERN_SIZE+3)&~3];
/* round up pattern size to a multiple of 4 bytes for faster access */
static bool xfont_variable_locked[VARIABLE_XCHARS];
static struct pattern_info hw_pattern[MAX_HW_PATTERNS];
static struct cursor_info cursor;
/* scrolling */
static volatile int scrolling_lines=0; /* Bitpattern of which lines are scrolling */
static void scroll_thread(void);
static char scroll_stack[DEFAULT_STACK_SIZE];
static const char scroll_name[] = "scroll";
static int scroll_ticks = 12; /* # of ticks between updates */
static int scroll_delay = HZ/2; /* delay before starting scroll */
static int bidir_limit = 50; /* percent */
static int jump_scroll_delay = HZ/4; /* delay between jump scroll jumps */
static int jump_scroll = 0; /* 0=off, 1=once, ..., JUMP_SCROLL_ALWAYS */
static struct scrollinfo scroll[SCROLLABLE_LINES];
static const char scroll_tick_table[16] = {
/* Hz values:
1, 1.25, 1.55, 2, 2.5, 3.12, 4, 5, 6.25, 8.33, 10, 12.5, 16.7, 20, 25, 33 */
100, 80, 64, 50, 40, 32, 25, 20, 16, 12, 10, 8, 6, 5, 4, 3
};
/* LCD init */
void lcd_init (void)
{
lcd_init_device();
lcd_charset_init();
memset(hw_pattern, 0, sizeof(hw_pattern));
memset(lcd_buffer, xchar_info[find_xchar(' ')].hw_char, sizeof(lcd_buffer));
create_thread(scroll_thread, scroll_stack,
sizeof(scroll_stack), scroll_name
IF_PRIO(, PRIORITY_USER_INTERFACE)
IF_COP(, CPU, false));
}
/** parameter handling **/
void lcd_setmargins(int x, int y)
{
xmargin = x;
ymargin = y;
}
int lcd_getxmargin(void)
{
return xmargin;
}
int lcd_getymargin(void)
{
return ymargin;
}
int lcd_getstringsize(const unsigned char *str, int *w, int *h)
{
int width = utf8length(str);
if (w)
*w = width;
if (h)
*h = 1;
return width;
}
/** low-level functions **/
static int find_xchar(unsigned long ucs)
{
int low = 0;
int high = xchar_info_size - 1;
do
{
int probe = (low + high) >> 1;
if (xchar_info[probe].ucs < ucs)
low = probe + 1;
else if (xchar_info[probe].ucs > ucs)
high = probe - 1;
else
return probe;
}
while (low <= high);
/* Not found: return index of no-char symbol (last symbol, hardcoded). */
return xchar_info_size - 1;
}
static int xchar_to_pat(int xchar)
{
int i;
for (i = 0; i < hw_pattern_count; i++)
if (hw_pattern[i].xchar == xchar)
return i;
return NO_PATTERN;
}
static const unsigned char *xchar_to_glyph(int xchar)
{
unsigned index = xchar_info[xchar].glyph;
if (index & 0x8000)
return xfont_variable[index & 0x7fff];
else
return xfont_fixed[index];
}
static void lcd_free_pat(int xchar)
{
int x, y;
unsigned char substitute;
int pat = xchar_to_pat(xchar);
if (pat != NO_PATTERN)
{
substitute = xchar_info[xchar].hw_char;
for (x = 0; x < LCD_WIDTH; x++)
{
for (y = 0; y < LCD_HEIGHT; y++)
{
if (pat == lcd_buffer[x][y])
{
lcd_buffer[x][y] = substitute;
#ifdef SIMULATOR
hardware_buffer_lcd[x][y] = substitute;
#else
lcd_put_hw_char(x, y, substitute);
#endif
}
}
}
if (cursor.enabled && pat == cursor.hw_char)
cursor.hw_char = substitute;
hw_pattern[pat].count = 0;
#ifdef SIMULATOR
lcd_update();
#endif
}
}
static int lcd_get_free_pat(int xchar)
{
static int last_used_pat = 0;
int pat = last_used_pat; /* start from last used pattern */
int least_pat = pat; /* pattern with least priority */
int least_priority = xchar_info[hw_pattern[pat].xchar].priority;
int i;
for (i = 0; i < hw_pattern_count; i++)
{
if (++pat >= hw_pattern_count) /* Keep 'pat' within limits */
pat = 0;
if (hw_pattern[pat].count == 0)
{
hw_pattern[pat].xchar = xchar;
last_used_pat = pat;
return pat;
}
if (xchar_info[hw_pattern[pat].xchar].priority < least_priority)
{
least_priority = xchar_info[hw_pattern[pat].xchar].priority;
least_pat = pat;
}
}
if (xchar_info[xchar].priority > least_priority) /* prioritized char */
{
lcd_free_pat(hw_pattern[least_pat].xchar);
hw_pattern[least_pat].xchar = xchar;
last_used_pat = least_pat;
return least_pat;
}
return NO_PATTERN;
}
static int map_xchar(int xchar)
{
int pat;
if (xchar_info[xchar].priority > 0) /* soft char */
{
pat = xchar_to_pat(xchar);
if (pat == NO_PATTERN) /* not yet mapped */
{
pat = lcd_get_free_pat(xchar); /* try to map */
if (pat == NO_PATTERN) /* failed: just use substitute */
return xchar_info[xchar].hw_char;
else /* define pattern */
lcd_define_hw_pattern(pat, xchar_to_glyph(xchar));
}
hw_pattern[pat].count++; /* increase reference count */
return pat;
}
else /* hardware char */
return xchar_info[xchar].hw_char;
}
static void lcd_putxchar(int x, int y, int xchar)
{
int lcd_char = lcd_buffer[x][y];
if (lcd_char < hw_pattern_count) /* old char was soft */
hw_pattern[lcd_char].count--; /* decrease old reference count */
lcd_buffer[x][y] = lcd_char = map_xchar(xchar);
#ifdef SIMULATOR
hardware_buffer_lcd[x][y] = lcd_char;
lcd_update();
#else
lcd_put_hw_char(x, y, lcd_char);
#endif
}
/** user-definable pattern handling **/
unsigned long lcd_get_locked_pattern(void)
{
int i = 0;
for (i = 0; i < VARIABLE_XCHARS; i++)
{
if (!xfont_variable_locked[i])
{
xfont_variable_locked[i] = true;
return 0xe000 + i; /* hard-coded */
}
}
return 0;
}
void lcd_unlock_pattern(unsigned long ucs)
{
int xchar = find_xchar(ucs);
int index = xchar_info[xchar].glyph;
if (index & 0x8000) /* variable extended char */
{
lcd_free_pat(xchar);
xfont_variable_locked[index & 0x7fff] = false;
}
}
void lcd_define_pattern(unsigned long ucs, const char *pattern)
{
int xchar = find_xchar(ucs);
int index = xchar_info[xchar].glyph;
int pat;
if (index & 0x8000) /* variable extended char */
{
memcpy(xfont_variable[index & 0x7fff], pattern, HW_PATTERN_SIZE);
pat = xchar_to_pat(xchar);
if (pat != NO_PATTERN)
lcd_define_hw_pattern(pat, pattern);
}
}
/** output functions **/
/* Clear the whole display */
void lcd_clear_display(void)
{
int x, y;
int xchar = find_xchar(' ');
lcd_stop_scroll();
lcd_remove_cursor();
for (x = 0; x < LCD_WIDTH; x++)
for (y = 0; y < LCD_HEIGHT; y++)
lcd_putxchar(x, y, xchar);
}
/* Put an unicode character at the given position */
void lcd_putc(int x, int y, unsigned long ucs)
{
if ((unsigned)x >= LCD_WIDTH || (unsigned)y >= LCD_HEIGHT)
return;
lcd_putxchar(x, y, find_xchar(ucs));
}
/* Show cursor (alternating with existing character) at the given position */
void lcd_put_cursor(int x, int y, unsigned long cursor_ucs)
{
if ((unsigned)x >= LCD_WIDTH || (unsigned)y >= LCD_HEIGHT
|| cursor.enabled)
return;
cursor.enabled = true;
cursor.visible = false;
cursor.hw_char = map_xchar(find_xchar(cursor_ucs));
cursor.x = x;
cursor.y = y;
cursor.downcount = 0;
cursor.divider = 4;
}
/* Remove the cursor */
void lcd_remove_cursor(void)
{
if (cursor.enabled)
{
if (cursor.hw_char < hw_pattern_count) /* soft char, unmap */
hw_pattern[cursor.hw_char].count--;
cursor.enabled = false;
#ifdef SIMULATOR
hardware_buffer_lcd[cursor.x][cursor.y] = lcd_buffer[cursor.x][cursor.y];
#else
lcd_put_hw_char(cursor.x, cursor.y, lcd_buffer[cursor.x][cursor.y]);
#endif
}
}
/* Put a string at a given position, skipping first ofs chars */
static int lcd_putsxyofs(int x, int y, int ofs, const unsigned char *str)
{
unsigned short ucs;
const unsigned char *utf8 = str;
while (*utf8 && x < LCD_WIDTH)
{
utf8 = utf8decode(utf8, &ucs);
if (ofs > 0)
{
ofs--;
continue;
}
lcd_putc(x++, y, ucs);
}
return x;
}
/* Put a string at a given 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_offset(x, y, str, 0);
}
/* Put a string at a given char position, skipping first offset chars */
void lcd_puts_offset(int x, int y, const unsigned char *str, int offset)
{
/* make sure scrolling is turned off on the line we are updating */
scrolling_lines &= ~(1 << y);
x += xmargin;
y += ymargin;
x = lcd_putsxyofs(x, y, offset, str);
while (x < LCD_WIDTH)
lcd_putc(x++, y, ' ');
}
/** scrolling **/
void lcd_stop_scroll(void)
{
scrolling_lines=0;
}
void lcd_scroll_speed(int speed)
{
scroll_ticks = scroll_tick_table[speed];
}
void lcd_scroll_delay(int ms)
{
scroll_delay = ms / (HZ / 10);
}
void lcd_bidir_scroll(int percent)
{
bidir_limit = percent;
}
void lcd_jump_scroll(int mode) /* 0=off, 1=once, ..., JUMP_SCROLL_ALWAYS */
{
jump_scroll = mode;
}
void lcd_jump_scroll_delay(int ms)
{
jump_scroll_delay = ms / (HZ / 10);
}
void lcd_puts_scroll(int x, int y, const unsigned char *string)
{
lcd_puts_scroll_offset(x, y, string, 0);
}
void lcd_puts_scroll_offset(int x, int y, const unsigned char *string,
int offset)
{
struct scrollinfo* s;
int len;
s = &scroll[y];
s->start_tick = current_tick + scroll_delay;
lcd_puts_offset(x, y, string, offset);
len = utf8length(string);
if (LCD_WIDTH - xmargin < len)
{
/* prepare scroll line */
char *end;
memset(s->line, 0, sizeof s->line);
strcpy(s->line, string);
/* get width */
s->len = utf8length(s->line);
/* scroll bidirectional or forward only depending on the string width */
if (bidir_limit)
{
s->bidir = s->len < (LCD_WIDTH - xmargin) * (100 + 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->len += SCROLL_SPACING;
}
end = strchr(s->line, '\0');
strncpy(end, string, LCD_WIDTH);
s->offset = offset;
s->startx = xmargin + x;
s->backward = false;
scrolling_lines |= (1<<y);
}
else
/* force a bit switch-off since it doesn't scroll */
scrolling_lines &= ~(1<<y);
}
static void scroll_thread(void)
{
struct scrollinfo* s;
int index;
int xpos, ypos;
/* initialize scroll struct array */
scrolling_lines = 0;
while (1)
{
for (index = 0; index < SCROLLABLE_LINES; index++)
{
/* really scroll? */
if (!(scrolling_lines&(1<<index)))
continue;
s = &scroll[index];
/* check pause */
if (TIME_BEFORE(current_tick, s->start_tick))
continue;
if (s->backward)
s->offset--;
else
s->offset++;
xpos = s->startx;
ypos = ymargin + index;
if (s->bidir) /* scroll bidirectional */
{
if (s->offset <= 0)
{
/* at beginning of line */
s->offset = 0;
s->backward = false;
s->start_tick = current_tick + scroll_delay * 2;
}
if (s->offset >= s->len - (LCD_WIDTH - xpos))
{
/* at end of line */
s->offset = s->len - (LCD_WIDTH - xpos);
s->backward = true;
s->start_tick = current_tick + scroll_delay * 2;
}
}
else /* scroll forward the whole time */
{
if (s->offset >= s->len)
s->offset -= s->len;
}
lcd_putsxyofs(xpos, ypos, s->offset, s->line);
}
if (cursor.enabled)
{
if (--cursor.downcount < 0)
{
int lcd_char;
cursor.downcount = cursor.divider;
cursor.visible = !cursor.visible;
lcd_char = cursor.visible ? cursor.hw_char
: lcd_buffer[cursor.x][cursor.y];
#ifdef SIMULATOR
hardware_buffer_lcd[cursor.x][cursor.y] = lcd_char;
#else
lcd_put_hw_char(cursor.x, cursor.y, lcd_char);
#endif
}
}
#ifdef SIMULATOR
lcd_update();
#endif
sleep(scroll_ticks);
}
}