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82 lines
2.1 KiB
82 lines
2.1 KiB
2 years ago
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/*
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* EEZ Modular Firmware
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* Copyright (C) 2015-present, Envox d.o.o.
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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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* 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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* 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 <eez/gui/font.h>
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namespace eez {
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namespace gui {
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namespace font {
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Font::Font()
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: fontData(0)
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{
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}
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Font::Font(const FontData *fontData_)
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: fontData(fontData_)
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{
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}
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uint8_t Font::getAscent() {
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return fontData->ascent;
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}
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uint8_t Font::getDescent() {
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return fontData->descent;
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}
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uint8_t Font::getHeight() {
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return fontData->ascent + fontData->descent;
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}
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const GlyphData *Font::getGlyph(int32_t encoding) {
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auto start = fontData->encodingStart;
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auto end = fontData->encodingEnd;
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uint32_t glyphIndex = 0;
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if ((uint32_t)encoding < start || (uint32_t)encoding > end) {
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// TODO use binary search
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uint32_t i;
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for (i = 0; i < fontData->groups.count; i++) {
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auto group = fontData->groups[i];
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if ((uint32_t)encoding >= group->encoding && (uint32_t)encoding < group->encoding + group->length) {
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glyphIndex = group->glyphIndex + (encoding - group->encoding);
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break;
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}
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}
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if (i == fontData->groups.count) {
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return nullptr;
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}
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} else {
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glyphIndex = encoding - start;
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}
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auto glyphData = fontData->glyphs[glyphIndex];
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if (glyphData->dx == -128) {
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// empty glyph
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return nullptr;
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}
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return glyphData;
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}
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} // namespace font
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} // namespace gui
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} // namespace eez
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