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