ref: 2de1b5630d7717f5fc5401a7ca3aa756d3c204fd
dir: /src/cid/cidobjs.c/
/****************************************************************************
*
* cidobjs.c
*
* CID objects manager (body).
*
* Copyright (C) 1996-2020 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftstream.h>
#include "cidgload.h"
#include "cidload.h"
#include <freetype/internal/services/svpscmap.h>
#include <freetype/internal/psaux.h>
#include <freetype/internal/pshints.h>
#include <freetype/ftdriver.h>
#include "ciderrs.h"
/**************************************************************************
*
* The macro FT_COMPONENT is used in trace mode. It is an implicit
* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
* messages during execution.
*/
#undef FT_COMPONENT
#define FT_COMPONENT cidobjs
/**************************************************************************
*
* SLOT FUNCTIONS
*
*/
FT_LOCAL_DEF( void )
cid_slot_done( FT_GlyphSlot slot )
{
if ( slot->internal )
slot->internal->glyph_hints = NULL;
}
FT_LOCAL_DEF( FT_Error )
cid_slot_init( FT_GlyphSlot slot )
{
CID_Face face;
PSHinter_Service pshinter;
face = (CID_Face)slot->face;
pshinter = (PSHinter_Service)face->pshinter;
if ( pshinter )
{
FT_Module module;
module = FT_Get_Module( slot->face->driver->root.library,
"pshinter" );
if ( module )
{
T1_Hints_Funcs funcs;
funcs = pshinter->get_t1_funcs( module );
slot->internal->glyph_hints = (void*)funcs;
}
}
return 0;
}
/**************************************************************************
*
* SIZE FUNCTIONS
*
*/
static PSH_Globals_Funcs
cid_size_get_globals_funcs( CID_Size size )
{
CID_Face face = (CID_Face)size->root.face;
PSHinter_Service pshinter = (PSHinter_Service)face->pshinter;
FT_Module module;
module = FT_Get_Module( size->root.face->driver->root.library,
"pshinter" );
return ( module && pshinter && pshinter->get_globals_funcs )
? pshinter->get_globals_funcs( module )
: 0;
}
FT_LOCAL_DEF( void )
cid_size_done( FT_Size cidsize ) /* CID_Size */
{
CID_Size size = (CID_Size)cidsize;
if ( cidsize->internal->module_data )
{
PSH_Globals_Funcs funcs;
funcs = cid_size_get_globals_funcs( size );
if ( funcs )
funcs->destroy( (PSH_Globals)cidsize->internal->module_data );
cidsize->internal->module_data = NULL;
}
}
FT_LOCAL_DEF( FT_Error )
cid_size_init( FT_Size cidsize ) /* CID_Size */
{
CID_Size size = (CID_Size)cidsize;
FT_Error error = FT_Err_Ok;
PSH_Globals_Funcs funcs = cid_size_get_globals_funcs( size );
if ( funcs )
{
PSH_Globals globals;
CID_Face face = (CID_Face)cidsize->face;
CID_FaceDict dict = face->cid.font_dicts + face->root.face_index;
PS_Private priv = &dict->private_dict;
error = funcs->create( cidsize->face->memory, priv, &globals );
if ( !error )
cidsize->internal->module_data = globals;
}
return error;
}
FT_LOCAL( FT_Error )
cid_size_request( FT_Size size,
FT_Size_Request req )
{
PSH_Globals_Funcs funcs;
FT_Request_Metrics( size->face, req );
funcs = cid_size_get_globals_funcs( (CID_Size)size );
if ( funcs )
funcs->set_scale( (PSH_Globals)size->internal->module_data,
size->metrics.x_scale,
size->metrics.y_scale,
0, 0 );
return FT_Err_Ok;
}
/**************************************************************************
*
* FACE FUNCTIONS
*
*/
/**************************************************************************
*
* @Function:
* cid_face_done
*
* @Description:
* Finalizes a given face object.
*
* @Input:
* face ::
* A pointer to the face object to destroy.
*/
FT_LOCAL_DEF( void )
cid_face_done( FT_Face cidface ) /* CID_Face */
{
CID_Face face = (CID_Face)cidface;
FT_Memory memory;
CID_FaceInfo cid;
PS_FontInfo info;
if ( !face )
return;
cid = &face->cid;
info = &cid->font_info;
memory = cidface->memory;
/* release subrs */
if ( face->subrs )
{
FT_Int n;
for ( n = 0; n < cid->num_dicts; n++ )
{
CID_Subrs subr = face->subrs + n;
if ( subr->code )
{
FT_FREE( subr->code[0] );
FT_FREE( subr->code );
}
}
FT_FREE( face->subrs );
}
/* release FontInfo strings */
FT_FREE( info->version );
FT_FREE( info->notice );
FT_FREE( info->full_name );
FT_FREE( info->family_name );
FT_FREE( info->weight );
/* release font dictionaries */
FT_FREE( cid->font_dicts );
cid->num_dicts = 0;
/* release other strings */
FT_FREE( cid->cid_font_name );
FT_FREE( cid->registry );
FT_FREE( cid->ordering );
cidface->family_name = NULL;
cidface->style_name = NULL;
FT_FREE( face->binary_data );
FT_FREE( face->cid_stream );
}
/**************************************************************************
*
* @Function:
* cid_face_init
*
* @Description:
* Initializes a given CID face object.
*
* @Input:
* stream ::
* The source font stream.
*
* face_index ::
* The index of the font face in the resource.
*
* num_params ::
* Number of additional generic parameters. Ignored.
*
* params ::
* Additional generic parameters. Ignored.
*
* @InOut:
* face ::
* The newly built face object.
*
* @Return:
* FreeType error code. 0 means success.
*/
FT_LOCAL_DEF( FT_Error )
cid_face_init( FT_Stream stream,
FT_Face cidface, /* CID_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
CID_Face face = (CID_Face)cidface;
FT_Error error;
PSAux_Service psaux;
PSHinter_Service pshinter;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_UNUSED( stream );
cidface->num_faces = 1;
psaux = (PSAux_Service)face->psaux;
if ( !psaux )
{
psaux = (PSAux_Service)FT_Get_Module_Interface(
FT_FACE_LIBRARY( face ), "psaux" );
if ( !psaux )
{
FT_ERROR(( "cid_face_init: cannot access `psaux' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
face->psaux = psaux;
}
pshinter = (PSHinter_Service)face->pshinter;
if ( !pshinter )
{
pshinter = (PSHinter_Service)FT_Get_Module_Interface(
FT_FACE_LIBRARY( face ), "pshinter" );
face->pshinter = pshinter;
}
FT_TRACE2(( "CID driver\n" ));
/* open the tokenizer; this will also check the font format */
if ( FT_STREAM_SEEK( 0 ) )
goto Exit;
error = cid_face_open( face, face_index );
if ( error )
goto Exit;
/* if we just wanted to check the format, leave successfully now */
if ( face_index < 0 )
goto Exit;
/* check the face index */
/* XXX: handle CID fonts with more than a single face */
if ( ( face_index & 0xFFFF ) != 0 )
{
FT_ERROR(( "cid_face_init: invalid face index\n" ));
error = FT_THROW( Invalid_Argument );
goto Exit;
}
/* now load the font program into the face object */
/* initialize the face object fields */
/* set up root face fields */
{
CID_FaceInfo cid = &face->cid;
PS_FontInfo info = &cid->font_info;
cidface->num_glyphs = (FT_Long)cid->cid_count;
cidface->num_charmaps = 0;
cidface->face_index = face_index & 0xFFFF;
cidface->face_flags |= FT_FACE_FLAG_SCALABLE | /* scalable outlines */
FT_FACE_FLAG_HORIZONTAL | /* horizontal data */
FT_FACE_FLAG_HINTER; /* has native hinter */
if ( info->is_fixed_pitch )
cidface->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
/* XXX: TODO: add kerning with .afm support */
/* get style name -- be careful, some broken fonts only */
/* have a /FontName dictionary entry! */
cidface->family_name = info->family_name;
/* assume "Regular" style if we don't know better */
cidface->style_name = (char *)"Regular";
if ( cidface->family_name )
{
char* full = info->full_name;
char* family = cidface->family_name;
if ( full )
{
while ( *full )
{
if ( *full == *family )
{
family++;
full++;
}
else
{
if ( *full == ' ' || *full == '-' )
full++;
else if ( *family == ' ' || *family == '-' )
family++;
else
{
if ( !*family )
cidface->style_name = full;
break;
}
}
}
}
}
else
{
/* do we have a `/FontName'? */
if ( cid->cid_font_name )
cidface->family_name = cid->cid_font_name;
}
/* compute style flags */
cidface->style_flags = 0;
if ( info->italic_angle )
cidface->style_flags |= FT_STYLE_FLAG_ITALIC;
if ( info->weight )
{
if ( !ft_strcmp( info->weight, "Bold" ) ||
!ft_strcmp( info->weight, "Black" ) )
cidface->style_flags |= FT_STYLE_FLAG_BOLD;
}
/* no embedded bitmap support */
cidface->num_fixed_sizes = 0;
cidface->available_sizes = NULL;
cidface->bbox.xMin = cid->font_bbox.xMin >> 16;
cidface->bbox.yMin = cid->font_bbox.yMin >> 16;
/* no `U' suffix here to 0xFFFF! */
cidface->bbox.xMax = ( cid->font_bbox.xMax + 0xFFFF ) >> 16;
cidface->bbox.yMax = ( cid->font_bbox.yMax + 0xFFFF ) >> 16;
if ( !cidface->units_per_EM )
cidface->units_per_EM = 1000;
cidface->ascender = (FT_Short)( cidface->bbox.yMax );
cidface->descender = (FT_Short)( cidface->bbox.yMin );
cidface->height = (FT_Short)( ( cidface->units_per_EM * 12 ) / 10 );
if ( cidface->height < cidface->ascender - cidface->descender )
cidface->height = (FT_Short)( cidface->ascender - cidface->descender );
cidface->underline_position = (FT_Short)info->underline_position;
cidface->underline_thickness = (FT_Short)info->underline_thickness;
}
Exit:
return error;
}
/**************************************************************************
*
* @Function:
* cid_driver_init
*
* @Description:
* Initializes a given CID driver object.
*
* @Input:
* driver ::
* A handle to the target driver object.
*
* @Return:
* FreeType error code. 0 means success.
*/
FT_LOCAL_DEF( FT_Error )
cid_driver_init( FT_Module module )
{
PS_Driver driver = (PS_Driver)module;
FT_UInt32 seed;
/* set default property values, cf. `ftt1drv.h' */
driver->hinting_engine = FT_HINTING_ADOBE;
driver->no_stem_darkening = TRUE;
driver->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1;
driver->darken_params[1] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1;
driver->darken_params[2] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2;
driver->darken_params[3] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2;
driver->darken_params[4] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3;
driver->darken_params[5] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3;
driver->darken_params[6] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4;
driver->darken_params[7] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4;
/* compute random seed from some memory addresses */
seed = (FT_UInt32)( (FT_Offset)(char*)&seed ^
(FT_Offset)(char*)&module ^
(FT_Offset)(char*)module->memory );
seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 );
driver->random_seed = (FT_Int32)seed;
if ( driver->random_seed < 0 )
driver->random_seed = -driver->random_seed;
else if ( driver->random_seed == 0 )
driver->random_seed = 123456789;
return FT_Err_Ok;
}
/**************************************************************************
*
* @Function:
* cid_driver_done
*
* @Description:
* Finalizes a given CID driver.
*
* @Input:
* driver ::
* A handle to the target CID driver.
*/
FT_LOCAL_DEF( void )
cid_driver_done( FT_Module driver )
{
FT_UNUSED( driver );
}
/* END */