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/*
* File : font_hz_file.c
* This file is part of RT-Thread GUI Engine
* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2010-09-15 Bernard first version
*/
/*
* Cached HZ font engine
*/
#include <rtgui/dc.h>
#include <rtgui/font.h>
#include <rtgui/tree.h>
#include <rtgui/rtgui_system.h>
#ifdef RTGUI_USING_HZ_FILE
#ifdef _WIN32_NATIVE
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <io.h>
#define open _open
#define close _close
#define read _read
#define write _write
#define unlink _unlink
#else
#include <dfs_posix.h>
#endif
#define HZ_CACHE_MAX 64
static int _font_cache_compare(struct hz_cache *node1, struct hz_cache *node2);
static void rtgui_hz_file_font_load(struct rtgui_font *font);
static void rtgui_hz_file_font_draw_text(struct rtgui_font *font, struct rtgui_dc *dc, const char *text, rt_ubase_t len, struct rtgui_rect *rect);
static void rtgui_hz_file_font_get_metrics(struct rtgui_font *font, const char *text, rtgui_rect_t *rect);
const struct rtgui_font_engine rtgui_hz_file_font_engine =
{
RT_NULL,
rtgui_hz_file_font_load,
rtgui_hz_file_font_draw_text,
rtgui_hz_file_font_get_metrics
};
SPLAY_PROTOTYPE(cache_tree, hz_cache, hz_node, _font_cache_compare);
SPLAY_GENERATE(cache_tree, hz_cache, hz_node, _font_cache_compare);
static int _font_cache_compare(struct hz_cache *cache_1, struct hz_cache *cache_2)
{
if (cache_1->hz_id > cache_2->hz_id) return 1;
if (cache_1->hz_id < cache_2->hz_id) return -1;
return 0;
}
static rt_uint8_t *_font_cache_get(struct rtgui_hz_file_font *font, rt_uint16_t hz_id)
{
rt_uint32_t seek;
struct hz_cache *cache, search;
search.hz_id = hz_id;
/* enter critical */
rtgui_enter_critical();
cache = SPLAY_FIND(cache_tree, &(font->cache_root), &search);
if (cache != RT_NULL)
{
/* exit critical */
rtgui_exit_critical();
/* found it */
return (rt_uint8_t *)(cache + 1);
}
/* exit critical */
rtgui_exit_critical();
/* can not find it, load to cache */
cache = (struct hz_cache *) rtgui_malloc(sizeof(struct hz_cache) + font->font_data_size);
if (cache == RT_NULL)
return RT_NULL; /* no memory yet */
cache->hz_id = hz_id;
seek = 94 * (((hz_id & 0xff) - 0xA0) - 1) + ((hz_id >> 8) - 0xA0) - 1;
seek *= font->font_data_size;
/* read hz font data */
if ((lseek(font->fd, seek, SEEK_SET) < 0) ||
read(font->fd, (char *)(cache + 1), font->font_data_size) !=
font->font_data_size)
{
rtgui_free(cache);
return RT_NULL;
}
/* enter critical */
rtgui_enter_critical();
if (font->cache_size >= HZ_CACHE_MAX)
{
/* remove a cache */
struct hz_cache *left;
left = font->cache_root.sph_root;
while (SPLAY_LEFT(left, hz_node) != RT_NULL) left = SPLAY_LEFT(left, hz_node);
/* remove the left node */
SPLAY_REMOVE(cache_tree, &(font->cache_root), left);
rtgui_free(left);
font->cache_size --;
}
/* insert to cache */
SPLAY_INSERT(cache_tree, &(font->cache_root), cache);
font->cache_size ++;
/* exit critical */
rtgui_exit_critical();
return (rt_uint8_t *)(cache + 1);
}
static void rtgui_hz_file_font_load(struct rtgui_font *font)
{
struct rtgui_hz_file_font *hz_file_font = (struct rtgui_hz_file_font *)font->data;
RT_ASSERT(hz_file_font != RT_NULL);
hz_file_font->fd = open(hz_file_font->font_fn, O_RDONLY, 0);
if (hz_file_font->fd < 0)
{
rt_kprintf("RTGUI: could not open the font file:%s\n", hz_file_font->font_fn);
rt_kprintf("RTGUI: please mount the fs first and make sure the file is there\n");
}
}
static void _rtgui_hz_file_font_draw_text(struct rtgui_hz_file_font *hz_file_font, struct rtgui_dc *dc, const char *text, rt_ubase_t len, struct rtgui_rect *rect)
{
rt_uint8_t *str;
rtgui_color_t bc;
rt_uint16_t style;
register rt_base_t h, word_bytes;
/* get text style */
style = rtgui_dc_get_gc(dc)->textstyle;
bc = rtgui_dc_get_gc(dc)->background;
/* drawing height */
h = (hz_file_font->font_size + rect->y1 > rect->y2) ?
rect->y2 - rect->y1 : hz_file_font->font_size;
word_bytes = (hz_file_font->font_size + 7) / 8;
str = (rt_uint8_t *)text;
while (len > 0 && rect->x1 < rect->x2)
{
const rt_uint8_t *font_ptr;
register rt_base_t i, j, k;
/* get font pixel data */
font_ptr = _font_cache_get(hz_file_font, *str | (*(str + 1) << 8));
/* draw word */
for (i = 0; i < h; i ++)
{
for (j = 0; j < word_bytes; j++)
for (k = 0; k < 8; k++)
{
if (((font_ptr[i * word_bytes + j] >> (7 - k)) & 0x01) != 0 &&
(rect->x1 + 8 * j + k < rect->x2))
{
rtgui_dc_draw_point(dc, rect->x1 + 8 * j + k, rect->y1 + i);
}
else if (style & RTGUI_TEXTSTYLE_DRAW_BACKGROUND)
{
rtgui_dc_draw_color_point(dc, rect->x1 + 8 * j + k, rect->y1 + i, bc);
}
}
}
/* move x to next character */
rect->x1 += hz_file_font->font_size;
str += 2;
len -= 2;
}
}
static void rtgui_hz_file_font_draw_text(struct rtgui_font *font, struct rtgui_dc *dc, const char *text, rt_ubase_t length, struct rtgui_rect *rect)
{
rt_uint32_t len;
struct rtgui_font *efont;
struct rtgui_hz_file_font *hz_file_font = (struct rtgui_hz_file_font *)font->data;
struct rtgui_rect text_rect;
RT_ASSERT(dc != RT_NULL);
RT_ASSERT(hz_file_font != RT_NULL);
rtgui_font_get_metrics(rtgui_dc_get_gc(dc)->font, text, &text_rect);
rtgui_rect_move_to_align(rect, &text_rect, RTGUI_DC_TEXTALIGN(dc));
/* get English font */
efont = rtgui_font_refer("asc", hz_file_font->font_size);
if (efont == RT_NULL) efont = rtgui_font_default(); /* use system default font */
while (length > 0)
{
len = 0;
while (((rt_uint8_t) * (text + len)) < 0x80 && *(text + len) && len < length) len ++;
/* draw text with English font */
if (len > 0)
{
rtgui_font_draw(efont, dc, text, len, &text_rect);
text += len;
length -= len;
}
len = 0;
while (((rt_uint8_t) * (text + len)) >= 0x80 && len < length) len ++;
if (len > 0)
{
_rtgui_hz_file_font_draw_text(hz_file_font, dc, text, len, &text_rect);
text += len;
length -= len;
}
}
rtgui_font_derefer(efont);
}
static void rtgui_hz_file_font_get_metrics(struct rtgui_font *font, const char *text, rtgui_rect_t *rect)
{
struct rtgui_hz_file_font *hz_file_font = (struct rtgui_hz_file_font *)font->data;
RT_ASSERT(hz_file_font != RT_NULL);
/* set metrics rect */
rect->x1 = rect->y1 = 0;
rect->x2 = (rt_int16_t)(hz_file_font->font_size / 2 * rt_strlen((const char *)text));
rect->y2 = hz_file_font->font_size;
}
#endif
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