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[pk] Define `attach_file' function in `pk_driver_class'. 

* src/pk/pkdrivr.c: Define `attach_file' function, `TFM_Read_Metrics'
in `pk_driver_class' to extract font metric information from `tfm'
file.

* src/pk/pkdrivr.c(PK_Face_Init): Initialise `TFM_Service' by calling
`FT_Get_Module_Interface'.
This commit is contained in:
Parth Wazurkar 2018-08-01 00:25:34 +05:30
parent 883e6af448
commit 1931328a34
1 changed files with 100 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
src/pk/pkdrivr.c
View File

@ -21,11 +21,11 @@
#include FT_INTERNAL_STREAM_H
#include FT_INTERNAL_OBJECTS_H
#include FT_TRUETYPE_IDS_H
#include FT_INTERNAL_TFM_H
#include FT_SERVICE_PK_H
#include FT_SERVICE_FONT_FORMAT_H
#include "pk.h"
#include "pkdrivr.h"
#include "pkerror.h"
@ -163,9 +163,20 @@
PK_Glyph go=NULL;
FT_UInt16 i,count;
TFM_Service tfm;
FT_UNUSED( num_params );
FT_UNUSED( params );
face->tfm = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"tfm" );
tfm = (TFM_Service)face->tfm;
if ( !tfm )
{
FT_ERROR(( "GF_Face_Init: cannot access `tfm' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
FT_TRACE2(( "PK driver\n" ));
@ -429,6 +440,93 @@
return error;
}
FT_LOCAL_DEF( void )
TFM_Done_Metrics( FT_Memory memory,
TFM_FontInfo fi )
{
FT_FREE(fi->width);
FT_FREE(fi->height);
FT_FREE(fi->depth);
FT_FREE( fi );
}
/* parse a TFM metrics file */
FT_LOCAL_DEF( FT_Error )
TFM_Read_Metrics( FT_Face pk_face,
FT_Stream stream )
{
TFM_Service tfm;
FT_Memory memory = stream->memory;
TFM_ParserRec parser;
TFM_FontInfo fi = NULL;
FT_Error error = FT_ERR( Unknown_File_Format );
PK_Face face = (PK_Face)pk_face;
PK_Glyph pk_glyph= face->pk_glyph;
if ( face->tfm_data )
{
FT_TRACE1(( "TFM_Read_Metrics:"
" Freeing previously attached metrics data.\n" ));
TFM_Done_Metrics( memory, (TFM_FontInfo)face->tfm_data );
face->tfm_data = NULL;
}
if ( FT_NEW( fi ) )
goto Exit;
FT_TRACE4(( "TFM_Read_Metrics: Invoking TFM_Service.\n" ));
tfm = (TFM_Service)face->tfm;
/* Initialise TFM Service */
error = tfm->init( &parser,
memory,
stream );
if ( !error )
{
FT_TRACE4(( "TFM_Read_Metrics: Initialised tfm metric data.\n" ));
parser.FontInfo = fi;
parser.user_data = pk_glyph;
error = tfm->parse_metrics( &parser );
if( !error )
FT_TRACE4(( "TFM_Read_Metrics: parsing TFM metric information done.\n" ));
FT_TRACE6(( "TFM_Read_Metrics: TFM Metric Information:\n"
" Check Sum : %ld\n"
" Design Size: %ld\n"
" Begin Char : %d\n"
" End Char : %d\n"
" font_bbx_w : %d\n"
" font_bbx_h : %d\n"
" slant : %d\n", parser.FontInfo->cs, parser.FontInfo->design_size, parser.FontInfo->begin_char,
parser.FontInfo->end_char, parser.FontInfo->font_bbx_w,
parser.FontInfo->font_bbx_h, parser.FontInfo->slant ));
tfm->done( &parser );
}
if ( !error )
{
/* Modify PK_Glyph data according to TFM metric values */
/*face->pk_glyph->font_bbx_w = fi->font_bbx_w;
face->pk_glyph->font_bbx_h = fi->font_bbx_h;
*/
face->tfm_data = fi;
fi = NULL;
}
Exit:
if ( fi )
TFM_Done_Metrics( memory, fi );
return error;
}
/*
*
* SERVICES LIST
@ -486,7 +584,7 @@
PK_Glyph_Load, /* FT_Slot_LoadFunc load_glyph */
NULL, /* FT_Face_GetKerningFunc get_kerning */
NULL, /* FT_Face_AttachFunc attach_file */
TFM_Read_Metrics, /* FT_Face_AttachFunc attach_file */
NULL, /* FT_Face_GetAdvancesFunc get_advances */
PK_Size_Request, /* FT_Size_RequestFunc request_size */