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81 lines
2.1 KiB
81 lines
2.1 KiB
#include "font.h"
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#include "utf8.h"
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#include "progmem.h"
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#include <stdint.h>
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union utf_lookup {
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const char symbol[4];
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/// symbol as uint, but not decoded - just for matching!
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const uint32_t uint;
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};
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struct utf_glyph5x {
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union utf_lookup utf;
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font5x_bitmap_t graphic;
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};
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struct utf_glyph4x {
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union utf_lookup utf;
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font4x_bitmap_t graphic;
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};
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struct utf_glyph3x {
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union utf_lookup utf;
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font3x_bitmap_t graphic;
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};
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#include "font_35.inc.c"
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#include "font_45.inc.c"
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#include "font_57.inc.c"
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#define ASCII_START 0x20
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#define ASCII_END 0x7e
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#define FONT_GETSYM_IMPL(rettype, symtype, fontname) \
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const rettype *fontname##_getsym(const struct Utf8Char *ch) { \
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const uint8_t byte0 = ch->bytes[0]; \
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if (byte0 < ASCII_START) { \
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goto fail; \
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} \
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if (byte0 <= ASCII_END) { \
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return &fontname##_ascii[byte0 - ASCII_START]; \
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} \
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for (uint8_t i = 0; i < sizeof(fontname##_extra) / sizeof(fontname##_extra[0]); i++) { \
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const struct symtype *sym = &fontname##_extra[i]; \
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const uint32_t table_ch = pgm_read_dword(&sym->utf.uint); \
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if (table_ch == ch->uint) { \
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return &sym->graphic; \
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} \
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} \
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fail: return &fontname ## _extra[0].graphic; \
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}
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FONT_GETSYM_IMPL(font5x_bitmap_t, utf_glyph5x, font57)
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FONT_GETSYM_IMPL(font4x_bitmap_t, utf_glyph4x, font45)
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FONT_GETSYM_IMPL(font3x_bitmap_t, utf_glyph3x, font35)
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#if 0
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const font5x_bitmap_t *font57_getsym(const struct Utf8Char *ch)
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{
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const uint8_t byte0 = ch->bytes[0];
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if (byte0 < ASCII_START) {
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goto fail;
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}
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if (byte0 <= ASCII_END) {
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return &font57_ascii[byte0 - ASCII_START];
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}
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for (uint8_t i = 0; i < sizeof(font57_extra) / sizeof(font57_extra[0]); i++) {
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const struct utf_glyph5x *sym = &font57_extra[i];
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const uint32_t table_ch = pgm_read_dword(&sym->uint);
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if (table_ch == ch->uint) {
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return &sym->graphic;
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}
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}
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fail:
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return &font57_extra[0].graphic; // replacement character
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}
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#endif
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