mirror of
https://github.com/lexborisov/Modest
synced 2024-11-21 21:31:25 +03:00
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/*
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Copyright (C) 2016-2017 Alexander Borisov
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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Author: lex.borisov@gmail.com (Alexander Borisov)
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*/
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#include "myfont/head.h"
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mystatus_t myfont_load_table_head(myfont_font_t* mf, uint8_t* font_data, size_t data_size)
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{
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memset(&mf->table_head, 0, sizeof(myfont_table_head_t));
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if(mf->cache.tables_offset[MyFONT_TKEY_head] == 0)
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return MyFONT_STATUS_OK;
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myfont_table_head_t *thead = &mf->table_head;
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const uint32_t table_offset = mf->cache.tables_offset[MyFONT_TKEY_head];
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if(data_size < (table_offset + 16 + 4 + 16 + 8 + 4 + 6))
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return MyFONT_STATUS_ERROR_TABLE_UNEXPECTED_ENDING;
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/* get current data */
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uint8_t *data = &font_data[table_offset];
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/* u32 */
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thead->version = myfont_read_u32(&data);
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thead->fontRevision = myfont_read_u32(&data);
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thead->checkSumAdjustment = myfont_read_u32(&data);
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thead->magicNumber = myfont_read_u32(&data);
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/* u16 */
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thead->flags = myfont_read_u16(&data);
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thead->unitsPerEm = myfont_read_u16(&data);
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/* u32 */
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thead->created[0] = myfont_read_u32(&data);
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thead->created[1] = myfont_read_u32(&data);
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thead->modified[0] = myfont_read_u32(&data);
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thead->modified[1] = myfont_read_u32(&data);
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/* 16 */
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thead->xMin = myfont_read_16(&data);
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thead->yMin = myfont_read_16(&data);
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thead->xMax = myfont_read_16(&data);
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thead->yMax = myfont_read_16(&data);
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/* u16 */
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thead->macStyle = myfont_read_u16(&data);
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thead->lowestRecPPEM = myfont_read_u16(&data);
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/* 16 */
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thead->fontDirectionHint = myfont_read_16(&data);
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thead->indexToLocFormat = myfont_read_16(&data);
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thead->glyphDataFormat = myfont_read_16(&data);
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return MyFONT_STATUS_OK;
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}
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float myfont_head_yMax_pixel(struct myfont_font *mf, float font_size)
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{
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return (float)mf->table_head.yMax * font_size / ((float)mf->table_head.unitsPerEm);
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}
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