1
0
mirror of https://github.com/trezor/trezor-firmware.git synced 2024-12-25 15:58:08 +00:00
trezor-firmware/core/embed/lib/fonts/fonts.c
2023-04-19 21:36:51 +02:00

171 lines
3.9 KiB
C

/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "fonts.h"
static uint8_t convert_char(const uint8_t c) {
static char last_was_utf8 = 0;
// non-printable ASCII character
if (c < ' ') {
last_was_utf8 = 0;
return 0x7F;
}
// regular ASCII character
if (c < 0x80) {
last_was_utf8 = 0;
return c;
}
// UTF-8 handling: https://en.wikipedia.org/wiki/UTF-8#Encoding
// bytes 11xxxxxx are first bytes of UTF-8 characters
if (c >= 0xC0) {
last_was_utf8 = 1;
return 0x7F;
}
if (last_was_utf8) {
// bytes 10xxxxxx can be successive UTF-8 characters ...
return 0; // skip glyph
} else {
// ... or they are just non-printable ASCII characters
return 0x7F;
}
}
int font_height(int font) {
switch (font) {
#ifdef TREZOR_FONT_NORMAL_ENABLE
case FONT_NORMAL:
return FONT_NORMAL_HEIGHT;
#endif
#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
case FONT_DEMIBOLD:
return FONT_DEMIBOLD_HEIGHT;
#endif
#ifdef TREZOR_FONT_BOLD_ENABLE
case FONT_BOLD:
return FONT_BOLD_HEIGHT;
#endif
#ifdef TREZOR_FONT_MONO_ENABLE
case FONT_MONO:
return FONT_MONO_HEIGHT;
#endif
}
return 0;
}
int font_max_height(int font) {
switch (font) {
#ifdef TREZOR_FONT_NORMAL_ENABLE
case FONT_NORMAL:
return FONT_NORMAL_MAX_HEIGHT;
#endif
#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
case FONT_DEMIBOLD:
return FONT_DEMIBOLD_MAX_HEIGHT;
#endif
#ifdef TREZOR_FONT_BOLD_ENABLE
case FONT_BOLD:
return FONT_BOLD_MAX_HEIGHT;
#endif
#ifdef TREZOR_FONT_MONO_ENABLE
case FONT_MONO:
return FONT_MONO_MAX_HEIGHT;
#endif
}
return 0;
}
int font_baseline(int font) {
switch (font) {
#ifdef TREZOR_FONT_NORMAL_ENABLE
case FONT_NORMAL:
return FONT_NORMAL_BASELINE;
#endif
#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
case FONT_DEMIBOLD:
return FONT_DEMIBOLD_BASELINE;
#endif
#ifdef TREZOR_FONT_BOLD_ENABLE
case FONT_BOLD:
return FONT_BOLD_BASELINE;
#endif
#ifdef TREZOR_FONT_MONO_ENABLE
case FONT_MONO:
return FONT_MONO_BASELINE;
#endif
}
return 0;
}
const uint8_t *font_get_glyph(int font, uint8_t c) {
c = convert_char(c);
if (!c) return 0;
// printable ASCII character
if (c >= ' ' && c < 0x7F) {
switch (font) {
#ifdef TREZOR_FONT_NORMAL_ENABLE
case FONT_NORMAL:
return FONT_NORMAL_DATA[c - ' '];
#endif
#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
case FONT_DEMIBOLD:
return FONT_DEMIBOLD_DATA[c - ' '];
#endif
#ifdef TREZOR_FONT_BOLD_ENABLE
case FONT_BOLD:
return FONT_BOLD_DATA[c - ' '];
#endif
#ifdef TREZOR_FONT_MONO_ENABLE
case FONT_MONO:
return FONT_MONO_DATA[c - ' '];
#endif
}
return 0;
}
// non-printable character
#define PASTER(s) s##_glyph_nonprintable
#define NONPRINTABLE_GLYPH(s) PASTER(s)
switch (font) {
#ifdef TREZOR_FONT_NORMAL_ENABLE
case FONT_NORMAL:
return NONPRINTABLE_GLYPH(FONT_NORMAL_DATA);
#endif
#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
case FONT_DEMIBOLD:
return NONPRINTABLE_GLYPH(FONT_DEMIBOLD_DATA);
#endif
#ifdef TREZOR_FONT_BOLD_ENABLE
case FONT_BOLD:
return NONPRINTABLE_GLYPH(FONT_BOLD_DATA);
#endif
#ifdef TREZOR_FONT_MONO_ENABLE
case FONT_MONO:
return NONPRINTABLE_GLYPH(FONT_MONO_DATA);
#endif
}
return 0;
}