mirror of
https://github.com/lexborisov/Modest
synced 2024-11-29 17:03:17 +03:00
86 lines
2.8 KiB
C
86 lines
2.8 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/vmtx.h"
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mystatus_t myfont_load_table_vmtx(myfont_font_t* mf, uint8_t* font_data, size_t data_size)
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{
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memset(&mf->table_vmtx, 0, sizeof(myfont_table_vmtx_t));
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if(mf->cache.tables_offset[MyFONT_TKEY_vmtx] == 0)
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return MyFONT_STATUS_OK;
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myfont_table_vmtx_t *tvmtx = &mf->table_vmtx;
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const uint32_t table_offset = mf->cache.tables_offset[MyFONT_TKEY_vmtx];
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/* get current data */
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uint8_t *data = &font_data[table_offset];
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uint16_t num_metrics = mf->table_vhea.numOfLongVerMetrics;
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if(num_metrics == 0)
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return MyFONT_STATUS_OK;
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uint32_t pos = table_offset + (num_metrics * 4);
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if(pos > data_size)
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return MyFONT_STATUS_ERROR_TABLE_UNEXPECTED_ENDING;
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myfont_long_ver_metric_t *lver_metric = (myfont_long_ver_metric_t *)myfont_calloc(mf, num_metrics, sizeof(myfont_long_ver_metric_t));
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if(lver_metric == NULL)
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return MyFONT_STATUS_ERROR_MEMORY_ALLOCATION;
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for(uint16_t i = 0; i < num_metrics; i++) {
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lver_metric[i].advanceHeight = myfont_read_u16(&data);
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lver_metric[i].topSideBearing = myfont_read_16(&data);
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}
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if(mf->table_maxp.numGlyphs <= mf->table_vhea.numOfLongVerMetrics) {
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myfont_free(mf, lver_metric);
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return MyFONT_STATUS_ERROR_TABLE_UNEXPECTED_ENDING;
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}
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uint16_t numOfTSB = mf->table_maxp.numGlyphs - mf->table_vhea.numOfLongVerMetrics;
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pos = pos + (numOfTSB * 2);
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if(pos > data_size) {
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myfont_free(mf, lver_metric);
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return MyFONT_STATUS_ERROR_TABLE_UNEXPECTED_ENDING;
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}
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int16_t *topSideBearing = (int16_t *)myfont_calloc(mf, numOfTSB, sizeof(int16_t));
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if(topSideBearing == NULL) {
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myfont_free(mf, lver_metric);
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return MyFONT_STATUS_ERROR_MEMORY_ALLOCATION;
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}
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for(uint16_t i = 0; i < num_metrics; i++) {
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topSideBearing[i] = myfont_read_16(&data);
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}
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tvmtx->vMetrics = lver_metric;
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tvmtx->topSideBearing = topSideBearing;
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return MyFONT_STATUS_OK;
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}
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