/* * Cached HZ font engine */ #include #include #include #include #ifdef RTGUI_USING_HZ_FILE #include #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); 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; cache = SPLAY_FIND(cache_tree, &(font->cache_root), &search); if (cache != RT_NULL) { /* find it */ return (rt_uint8_t*)(cache + 1); } /* 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; } /* insert to cache */ SPLAY_INSERT(cache_tree, &(font->cache_root), cache); font->cache_size ++; if (font->cache_size > HZ_CACHE_MAX) { /* remove a cache */ struct hz_cache* left; left = SPLAY_LEFT(font->cache_root.sph_root, hz_node); 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); font->cache_size --; } 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); } 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) { rt_base_t h; rt_uint8_t* str; struct rtgui_hz_file_font* hz_file_font = (struct rtgui_hz_file_font*)font->data; RT_ASSERT(hz_file_font != RT_NULL); /* drawing height */ h = (hz_file_font->font_size + rect->y1 > rect->y2)? rect->y2 - rect->y1 : hz_file_font->font_size; 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 < 2; j++) for (k=0; k < 8; k++) { if ( ((font_ptr[i*2 + 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); } } } /* move x to next character */ rect->x1 += hz_file_font->font_size; str += 2; len -= 2; } } 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