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171 lines
3.9 KiB
171 lines
3.9 KiB
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "fonts.h"
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static uint8_t convert_char(const uint8_t c) {
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static char last_was_utf8 = 0;
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// non-printable ASCII character
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if (c < ' ') {
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last_was_utf8 = 0;
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return 0x7F;
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}
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// regular ASCII character
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if (c < 0x80) {
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last_was_utf8 = 0;
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return c;
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}
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// UTF-8 handling: https://en.wikipedia.org/wiki/UTF-8#Encoding
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// bytes 11xxxxxx are first bytes of UTF-8 characters
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if (c >= 0xC0) {
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last_was_utf8 = 1;
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return 0x7F;
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}
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if (last_was_utf8) {
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// bytes 10xxxxxx can be successive UTF-8 characters ...
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return 0; // skip glyph
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} else {
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// ... or they are just non-printable ASCII characters
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return 0x7F;
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}
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}
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int font_height(int font) {
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switch (font) {
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#ifdef TREZOR_FONT_NORMAL_ENABLE
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case FONT_NORMAL:
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return FONT_NORMAL_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
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case FONT_DEMIBOLD:
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return FONT_DEMIBOLD_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_BOLD_ENABLE
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case FONT_BOLD:
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return FONT_BOLD_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_MONO_ENABLE
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case FONT_MONO:
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return FONT_MONO_HEIGHT;
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#endif
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}
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return 0;
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}
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int font_max_height(int font) {
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switch (font) {
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#ifdef TREZOR_FONT_NORMAL_ENABLE
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case FONT_NORMAL:
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return FONT_NORMAL_MAX_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
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case FONT_DEMIBOLD:
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return FONT_DEMIBOLD_MAX_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_BOLD_ENABLE
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case FONT_BOLD:
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return FONT_BOLD_MAX_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_MONO_ENABLE
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case FONT_MONO:
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return FONT_MONO_MAX_HEIGHT;
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#endif
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}
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return 0;
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}
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int font_baseline(int font) {
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switch (font) {
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#ifdef TREZOR_FONT_NORMAL_ENABLE
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case FONT_NORMAL:
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return FONT_NORMAL_BASELINE;
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#endif
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#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
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case FONT_DEMIBOLD:
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return FONT_DEMIBOLD_BASELINE;
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#endif
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#ifdef TREZOR_FONT_BOLD_ENABLE
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case FONT_BOLD:
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return FONT_BOLD_BASELINE;
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#endif
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#ifdef TREZOR_FONT_MONO_ENABLE
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case FONT_MONO:
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return FONT_MONO_BASELINE;
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#endif
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}
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return 0;
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}
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const uint8_t *font_get_glyph(int font, uint8_t c) {
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c = convert_char(c);
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if (!c) return 0;
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// printable ASCII character
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if (c >= ' ' && c < 0x7F) {
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switch (font) {
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#ifdef TREZOR_FONT_NORMAL_ENABLE
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case FONT_NORMAL:
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return FONT_NORMAL_DATA[c - ' '];
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#endif
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#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
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case FONT_DEMIBOLD:
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return FONT_DEMIBOLD_DATA[c - ' '];
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#endif
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#ifdef TREZOR_FONT_BOLD_ENABLE
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case FONT_BOLD:
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return FONT_BOLD_DATA[c - ' '];
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#endif
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#ifdef TREZOR_FONT_MONO_ENABLE
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case FONT_MONO:
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return FONT_MONO_DATA[c - ' '];
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#endif
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}
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return 0;
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}
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// non-printable character
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#define PASTER(s) s##_glyph_nonprintable
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#define NONPRINTABLE_GLYPH(s) PASTER(s)
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switch (font) {
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#ifdef TREZOR_FONT_NORMAL_ENABLE
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case FONT_NORMAL:
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return NONPRINTABLE_GLYPH(FONT_NORMAL_DATA);
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#endif
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#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
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case FONT_DEMIBOLD:
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return NONPRINTABLE_GLYPH(FONT_DEMIBOLD_DATA);
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#endif
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#ifdef TREZOR_FONT_BOLD_ENABLE
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case FONT_BOLD:
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return NONPRINTABLE_GLYPH(FONT_BOLD_DATA);
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#endif
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#ifdef TREZOR_FONT_MONO_ENABLE
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case FONT_MONO:
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return NONPRINTABLE_GLYPH(FONT_MONO_DATA);
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#endif
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}
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return 0;
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}
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