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286 lines
7.1 KiB
286 lines
7.1 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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#include <assert.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <string.h>
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#ifdef TRANSLATIONS
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#include "librust_fonts.h"
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#endif
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#define UNICODE_BADCHAR 0xFFFD
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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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#ifdef TREZOR_FONT_BIG_ENABLE
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case FONT_BIG:
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return FONT_BIG_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_SUB_ENABLE
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case FONT_SUB:
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return FONT_SUB_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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#ifdef TREZOR_FONT_BIG_ENABLE
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case FONT_BIG:
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return FONT_BIG_MAX_HEIGHT;
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#endif
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#ifdef TREZOR_FONT_SUB_ENABLE
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case FONT_SUB:
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return FONT_SUB_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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#ifdef TREZOR_FONT_BIG_ENABLE
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case FONT_BIG:
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return FONT_BIG_BASELINE;
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#endif
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#ifdef TREZOR_FONT_SUB_ENABLE
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case FONT_SUB:
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return FONT_SUB_BASELINE;
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#endif
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}
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return 0;
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}
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font_glyph_iter_t font_glyph_iter_init(const int font, const uint8_t *text,
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const int len) {
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return (font_glyph_iter_t){
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.font = font,
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.text = text,
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.remaining = len,
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};
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}
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#define IS_UTF8_CONTINUE(c) (((c)&0b11000000) == 0b10000000)
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static uint16_t next_utf8_codepoint(font_glyph_iter_t *iter) {
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uint16_t out;
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assert(iter->remaining > 0);
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// 1-byte UTF-8 character
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if (iter->text[0] < 0x7f) {
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out = iter->text[0];
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++iter->text;
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--iter->remaining;
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return out;
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}
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// 2-byte UTF-8 character
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if (iter->remaining >= 2 && ((iter->text[0] & 0b11100000) == 0b11000000) &&
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IS_UTF8_CONTINUE(iter->text[1])) {
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out = (((uint16_t)iter->text[0] & 0b00011111) << 6) |
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(iter->text[1] & 0b00111111);
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iter->text += 2;
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iter->remaining -= 2;
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return out;
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}
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// 3-byte UTF-8 character
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if (iter->remaining >= 3 && ((iter->text[0] & 0b11110000) == 0b11100000) &&
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IS_UTF8_CONTINUE(iter->text[1]) && IS_UTF8_CONTINUE(iter->text[2])) {
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out = (((uint16_t)iter->text[0] & 0b00001111) << 12) |
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(((uint16_t)iter->text[1] & 0b00111111) << 6) |
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(iter->text[2] & 0b00111111);
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iter->text += 3;
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iter->remaining -= 3;
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return out;
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}
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// 4-byte UTF-8 character
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if (iter->remaining >= 4 && ((iter->text[0] & 0b11111000) == 0b11110000) &&
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IS_UTF8_CONTINUE(iter->text[1]) && IS_UTF8_CONTINUE(iter->text[2]) &&
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IS_UTF8_CONTINUE(iter->text[3])) {
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// we use 16-bit codepoints, so we can't represent 4-byte UTF-8 characters
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iter->text += 4;
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iter->remaining -= 4;
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return UNICODE_BADCHAR;
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}
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++iter->text;
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--iter->remaining;
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return UNICODE_BADCHAR;
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}
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bool font_next_glyph(font_glyph_iter_t *iter, const uint8_t **out) {
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if (iter->remaining <= 0) {
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return false;
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}
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uint16_t c = next_utf8_codepoint(iter);
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*out = font_get_glyph(iter->font, c);
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if (*out == NULL) {
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// should not happen but ¯\_(ツ)_/¯
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return font_next_glyph(iter, out);
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} else {
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return true;
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}
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}
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const uint8_t *font_nonprintable_glyph(int font) {
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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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#ifdef TREZOR_FONT_BIG_ENABLE
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case FONT_BIG:
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return NONPRINTABLE_GLYPH(FONT_BIG_DATA);
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#endif
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#ifdef TREZOR_FONT_SUB_ENABLE
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case FONT_SUB:
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return NONPRINTABLE_GLYPH(FONT_SUB_DATA);
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#endif
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default:
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return NULL;
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}
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}
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const uint8_t *font_get_glyph(int font, uint16_t c) {
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#ifdef TRANSLATIONS
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// found UTF8 character
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// it is not hardcoded in firmware fonts, it must be extracted from the
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// embedded blob
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if (c >= 0x7F) {
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const uint8_t *g = get_utf8_glyph(c, font);
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if (g != NULL) {
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return g;
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}
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}
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#endif
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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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#ifdef TREZOR_FONT_BIG_ENABLE
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case FONT_BIG:
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return FONT_BIG_DATA[c - ' '];
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#endif
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#ifdef TREZOR_FONT_SUB_ENABLE
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case FONT_SUB:
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return FONT_SUB_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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return font_nonprintable_glyph(font);
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}
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// compute the width of the text (in pixels)
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int font_text_width(int font, const char *text, int textlen) {
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int width = 0;
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// determine text length if not provided
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if (textlen < 0) {
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textlen = strlen(text);
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}
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font_glyph_iter_t iter = font_glyph_iter_init(font, (uint8_t *)text, textlen);
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const uint8_t *g = NULL;
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while (font_next_glyph(&iter, &g)) {
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const uint8_t adv = g[2]; // advance
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width += adv;
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}
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return width;
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}
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