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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/loca.h"
mystatus_t myfont_load_table_loca(myfont_font_t* mf, uint8_t* font_data, size_t data_size)
{
memset(&mf->table_loca, 0, sizeof(myfont_table_loca_t));
if(mf->cache.tables_offset[MyFONT_TKEY_loca] == 0)
return MyFONT_STATUS_OK;
myfont_table_loca_t *tloca = &mf->table_loca;
uint32_t table_offset = mf->cache.tables_offset[MyFONT_TKEY_loca];
/* get current data */
uint8_t *data = &font_data[table_offset];
uint16_t numGlyph = mf->table_maxp.numGlyphs;
if(numGlyph == 0)
return MyFONT_STATUS_ERROR_TABLE_BROKEN;
numGlyph++;
tloca->offsets = (uint32_t *)myfont_calloc(mf, numGlyph, sizeof(uint32_t));
if(tloca->offsets == NULL)
return MyFONT_STATUS_ERROR_MEMORY_ALLOCATION;
if(mf->table_head.indexToLocFormat)
{
if(data_size < (table_offset + (numGlyph * 4))) {
myfont_free(mf, tloca->offsets);
return MyFONT_STATUS_ERROR_TABLE_UNEXPECTED_ENDING;
}
for(size_t i = 0; i < numGlyph; i++) {
tloca->offsets[i] = myfont_read_u32(&data);
}
}
else
{
if(data_size < (table_offset + (numGlyph * 2))) {
myfont_free(mf, tloca->offsets);
return MyFONT_STATUS_ERROR_TABLE_UNEXPECTED_ENDING;
}
for(size_t i = 0; i < numGlyph; i++) {
tloca->offsets[i] = myfont_read_u16(&data) * 2;
}
}
return MyFONT_STATUS_OK;
}
uint32_t myfont_loca_get_offset(struct myfont_font *mf, uint16_t glyph_index)
{
if(glyph_index >= mf->table_maxp.numGlyphs)
return mf->table_loca.offsets[0];
return mf->table_loca.offsets[glyph_index];
}
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