72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
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#include <rtgui/dc.h>
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#include <rtgui/font.h>
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static void rtgui_hz_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect);
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static void rtgui_hz_bitmap_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* text, rtgui_rect_t* rect);
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struct rtgui_font_engine hz_bmp_font_engine =
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{
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RT_NULL,
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RT_NULL,
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rtgui_hz_bitmap_font_draw_text,
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rtgui_hz_bitmap_font_get_metrics
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};
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static void rtgui_hz_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect)
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{
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rt_base_t h;
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rt_uint8_t* str;
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struct rtgui_font_bitmap* bmp_font = (struct rtgui_font_bitmap*)(font->data);
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RT_ASSERT(bmp_font != RT_NULL);
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/* drawing height */
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h = (bmp_font->height + rect->y1 > rect->y2)? rect->y2 - rect->y1 : bmp_font->height;
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str = (rt_uint8_t*)text;
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while (len > 0 && rect->x1 < rect->x2)
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{
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const rt_uint8_t* font_ptr;
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rt_ubase_t sect, index;
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register rt_base_t i, j, k;
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/* calculate section and index */
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sect = *str - 0xA0;
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index = *(str+1) - 0xA0;
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/* get font pixel data */
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font_ptr = bmp_font->bmp + ( 94*(sect-1) + (index-1) )*(bmp_font->width + bmp_font->height);
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/* draw word */
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for (i=0; i < h; i ++)
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{
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for (j=0; j < 2; j++)
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for (k=0; k < 8; k++)
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{
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if ( ((font_ptr[i*2 + j] >> (7-k)) & 0x01) != 0 &&
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(rect->x1 + 8 * j + k < rect->x2))
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{
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rtgui_dc_draw_point(dc, rect->x1 + 8*j + k, rect->y1 + i);
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}
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}
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}
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/* move x to next character */
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rect->x1 += bmp_font->width;
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str += 2;
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len -= 2;
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}
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}
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static void rtgui_hz_bitmap_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* text, rtgui_rect_t* rect)
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{
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struct rtgui_font_bitmap* bmp_font = (struct rtgui_font_bitmap*)(font->data);
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RT_ASSERT(bmp_font != RT_NULL);
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/* set metrics rect */
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rect->x1 = rect->y1 = 0;
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rect->x2 = (rt_int16_t)(bmp_font->width * rt_strlen((const char*)text));
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rect->y2 = bmp_font->height;
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}
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