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81 lines
2.1 KiB
81 lines
2.1 KiB
/* |
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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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