FT_Error
TA_sfnt_build_gasp_table(SFNT* sfnt,
FONT* font)
{
FT_Error error;
FT_Byte* gasp_buf;
error = TA_sfnt_add_table_info(sfnt);
if (error)
return error;
error = TA_table_build_gasp(&gasp_buf);
if (error)
return error;
/* in case of success, `gasp_buf' gets linked */
/* and is eventually freed in `TA_font_unload' */
error = TA_font_add_table(font,
&sfnt->table_infos[sfnt->num_table_infos - 1],
TTAG_gasp, GASP_LEN, gasp_buf);
if (error)
{
free(gasp_buf);
return error;
}
return FT_Err_Ok;
}
FT_Error
TA_sfnt_build_prep_table(SFNT* sfnt,
FONT* font)
{
FT_Error error;
SFNT_Table* glyf_table = &font->tables[sfnt->glyf_idx];
glyf_Data* data = (glyf_Data*)glyf_table->data;
FT_Byte* prep_buf;
FT_ULong prep_len;
error = TA_sfnt_add_table_info(sfnt);
if (error)
goto Exit;
/* `glyf', `cvt', `fpgm', and `prep' are always used in parallel */
if (glyf_table->processed)
{
sfnt->table_infos[sfnt->num_table_infos - 1] = data->prep_idx;
goto Exit;
}
error = TA_table_build_prep(&prep_buf, &prep_len, sfnt, font);
if (error)
goto Exit;
#if 0
/* ttfautohint's bytecode in `fpgm' is larger */
/* than the bytecode in `prep'; */
/* this commented out code here is just for completeness */
if (prep_len > sfnt->max_instructions)
sfnt->max_instructions = prep_len;
#endif
/* in case of success, `prep_buf' gets linked */
/* and is eventually freed in `TA_font_unload' */
error = TA_font_add_table(font,
&sfnt->table_infos[sfnt->num_table_infos - 1],
TTAG_prep, prep_len, prep_buf);
if (error)
free(prep_buf);
else
data->prep_idx = sfnt->table_infos[sfnt->num_table_infos - 1];
Exit:
return error;
}
FT_Error
TA_sfnt_build_prep_table(SFNT* sfnt,
FONT* font)
{
FT_Error error;
FT_Byte* prep_buf;
FT_ULong prep_len;
error = TA_sfnt_add_table_info(sfnt);
if (error)
return error;
error = TA_table_build_prep(&prep_buf, &prep_len, font);
if (error)
return error;
#if 0
/* ttfautohint's bytecode in `fpgm' is larger */
/* than the bytecode in `prep'; */
/* this commented out code here is just for completeness */
if (prep_len > sfnt->max_instructions)
sfnt->max_instructions = prep_len;
#endif
/* in case of success, `prep_buf' gets linked */
/* and is eventually freed in `TA_font_unload' */
error = TA_font_add_table(font,
&sfnt->table_infos[sfnt->num_table_infos - 1],
TTAG_prep, prep_len, prep_buf);
if (error)
{
free(prep_buf);
return error;
}
return FT_Err_Ok;
}
FT_Error
TA_sfnt_build_gasp_table(SFNT* sfnt,
FONT* font)
{
FT_Error error;
FT_Byte* gasp_buf;
error = TA_sfnt_add_table_info(sfnt);
if (error)
goto Exit;
if (font->gasp_idx != MISSING)
{
sfnt->table_infos[sfnt->num_table_infos - 1] = font->gasp_idx;
goto Exit;
}
error = TA_table_build_gasp(&gasp_buf);
if (error)
goto Exit;
/* in case of success, `gasp_buf' gets linked */
/* and is eventually freed in `TA_font_unload' */
error = TA_font_add_table(font,
&sfnt->table_infos[sfnt->num_table_infos - 1],
TTAG_gasp, GASP_LEN, gasp_buf);
if (error)
free(gasp_buf);
else
font->gasp_idx = sfnt->table_infos[sfnt->num_table_infos - 1];
Exit:
return error;
}
FT_Error
TA_font_build_TTC(FONT* font)
{
SFNT* sfnts = font->sfnts;
FT_Long num_sfnts = font->num_sfnts;
SFNT_Table* tables;
FT_ULong num_tables;
FT_Byte* DSIG_buf;
SFNT_Table_Info dummy;
FT_Byte* TTC_header_buf;
FT_ULong TTC_header_len;
FT_Byte** TTF_header_bufs = NULL;
FT_ULong* TTF_header_lens = NULL;
FT_ULong offset;
FT_Long i;
FT_ULong j;
FT_Error error;
/* replace an existing `DSIG' table with a dummy */
if (font->have_DSIG)
{
error = TA_table_build_DSIG(&DSIG_buf);
if (error)
return error;
/* in case of success, `DSIG_buf' gets linked */
/* and is eventually freed in `TA_font_unload' */
error = TA_font_add_table(font, &dummy, TTAG_DSIG, DSIG_LEN, DSIG_buf);
if (error)
{
free(DSIG_buf);
return error;
}
}
/* this also computes the SFNT table offsets */
error = TA_font_build_TTC_header(font,
&TTC_header_buf, &TTC_header_len);
if (error)
return error;
TTF_header_bufs = (FT_Byte**)calloc(1, num_sfnts * sizeof (FT_Byte*));
if (!TTF_header_bufs)
goto Err;
TTF_header_lens = (FT_ULong*)malloc(num_sfnts * sizeof (FT_ULong));
if (!TTF_header_lens)
goto Err;
for (i = 0; i < num_sfnts; i++)
{
error = TA_sfnt_build_TTF_header(&sfnts[i], font,
&TTF_header_bufs[i],
&TTF_header_lens[i], 1);
if (error)
goto Err;
}
/* build font */
tables = font->tables;
num_tables = font->num_tables;
/* get font length from last SFNT table array element */
font->out_len = tables[num_tables - 1].offset
+ ((tables[num_tables - 1].len + 3) & ~3);
font->out_buf = (FT_Byte*)malloc(font->out_len);
if (!font->out_buf)
{
error = FT_Err_Out_Of_Memory;
goto Err;
}
memcpy(font->out_buf, TTC_header_buf, TTC_header_len);
offset = TTC_header_len;
for (i = 0; i < num_sfnts; i++)
{
memcpy(font->out_buf + offset,
TTF_header_bufs[i], TTF_header_lens[i]);
offset += TTF_header_lens[i];
}
for (j = 0; j < num_tables; j++)
{
SFNT_Table* table = &tables[j];
/* buffer length is a multiple of 4 */
memcpy(font->out_buf + table->offset,
table->buf, (table->len + 3) & ~3);
}
error = TA_Err_Ok;
Err:
free(TTC_header_buf);
if (TTF_header_bufs)
{
for (i = 0; i < font->num_sfnts; i++)
free(TTF_header_bufs[i]);
free(TTF_header_bufs);
}
free(TTF_header_lens);
return error;
}
FT_Error
TA_font_build_TTF(FONT* font)
{
SFNT* sfnt = &font->sfnts[0];
SFNT_Table* tables;
FT_ULong num_tables;
FT_ULong SFNT_offset;
FT_Byte* DSIG_buf;
FT_Byte* header_buf;
FT_ULong header_len;
FT_ULong i;
FT_Error error;
/* replace an existing `DSIG' table with a dummy */
if (font->have_DSIG)
{
error = TA_sfnt_add_table_info(sfnt);
if (error)
return error;
error = TA_table_build_DSIG(&DSIG_buf);
if (error)
return error;
/* in case of success, `DSIG_buf' gets linked */
/* and is eventually freed in `TA_font_unload' */
error = TA_font_add_table(font,
&sfnt->table_infos[sfnt->num_table_infos - 1],
TTAG_DSIG, DSIG_LEN, DSIG_buf);
if (error)
{
free(DSIG_buf);
return error;
}
}
TA_sfnt_sort_table_info(sfnt, font);
/* the first SFNT table immediately follows the header */
(void)TA_sfnt_build_TTF_header(sfnt, font, NULL, &SFNT_offset, 0);
TA_font_compute_table_offsets(font, SFNT_offset);
error = TA_sfnt_build_TTF_header(sfnt, font,
&header_buf, &header_len, 1);
if (error)
return error;
/* build font */
tables = font->tables;
num_tables = font->num_tables;
/* get font length from last SFNT table array element */
font->out_len = tables[num_tables - 1].offset
+ ((tables[num_tables - 1].len + 3) & ~3);
font->out_buf = (FT_Byte*)malloc(font->out_len);
if (!font->out_buf)
{
error = FT_Err_Out_Of_Memory;
goto Err;
}
memcpy(font->out_buf, header_buf, header_len);
for (i = 0; i < num_tables; i++)
{
SFNT_Table* table = &tables[i];
/* buffer length is a multiple of 4 */
memcpy(font->out_buf + table->offset,
table->buf, (table->len + 3) & ~3);
}
error = TA_Err_Ok;
Err:
free(header_buf);
return error;
}
