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/*
Copyright (C) 2016-2017 Alexander Borisov
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Author: lex.borisov@gmail.com (Alexander Borisov)
*/
#include "myfont/hmtx.h"
mystatus_t myfont_load_table_hmtx(myfont_font_t* mf, uint8_t* font_data, size_t data_size)
{
memset(&mf->table_hmtx, 0, sizeof(myfont_table_hmtx_t));
if(mf->cache.tables_offset[MyFONT_TKEY_hmtx] == 0)
return MyFONT_STATUS_OK;
myfont_table_hmtx_t *thmtx = &mf->table_hmtx;
const uint32_t table_offset = mf->cache.tables_offset[MyFONT_TKEY_hmtx];
/* get current data */
uint8_t *data = &font_data[table_offset];
uint16_t num_metrics = mf->table_hhea.numberOfHMetrics;
if(num_metrics == 0)
return MyFONT_STATUS_OK;
if(data_size < (table_offset + (num_metrics * 2)))
return MyFONT_STATUS_ERROR_TABLE_UNEXPECTED_ENDING;
myfont_long_hor_metric_t *lhor_metric = (myfont_long_hor_metric_t *)myfont_calloc(mf, num_metrics, sizeof(myfont_long_hor_metric_t));
if(lhor_metric == NULL)
return MyFONT_STATUS_ERROR_MEMORY_ALLOCATION;
for(uint16_t i = 0; i < num_metrics; i++) {
lhor_metric[i].advanceWidth = myfont_read_u16(&data);
lhor_metric[i].lsb = myfont_read_16(&data);
}
thmtx->hMetrics = lhor_metric;
thmtx->leftSideBearing = NULL;
return MyFONT_STATUS_OK;
}
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