ref: d247c56278215d2ff9cb65563fe250b9a852c18a
dir: /src/type1/t1objs.c/
/****************************************************************************
*
* t1objs.c
*
* Type 1 objects manager (body).
*
* Copyright (C) 1996-2022 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/ftcalc.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftstream.h>
#include <freetype/ttnameid.h>
#include <freetype/ftdriver.h>
#include "t1gload.h"
#include "t1load.h"
#include "t1errors.h"
#ifndef T1_CONFIG_OPTION_NO_AFM
#include "t1afm.h"
#endif
#include <freetype/internal/services/svpscmap.h>
#include <freetype/internal/psaux.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 t1objs
/**************************************************************************
*
* SIZE FUNCTIONS
*
*/
static PSH_Globals_Funcs
T1_Size_Get_Globals_Funcs( T1_Size size )
{
T1_Face face = (T1_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 )
T1_Size_Done( FT_Size t1size ) /* T1_Size */
{
T1_Size size = (T1_Size)t1size;
if ( t1size->internal->module_data )
{
PSH_Globals_Funcs funcs;
funcs = T1_Size_Get_Globals_Funcs( size );
if ( funcs )
funcs->destroy( (PSH_Globals)t1size->internal->module_data );
t1size->internal->module_data = NULL;
}
}
FT_LOCAL_DEF( FT_Error )
T1_Size_Init( FT_Size t1size ) /* T1_Size */
{
T1_Size size = (T1_Size)t1size;
FT_Error error = FT_Err_Ok;
PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
if ( funcs )
{
PSH_Globals globals;
T1_Face face = (T1_Face)size->root.face;
error = funcs->create( size->root.face->memory,
&face->type1.private_dict, &globals );
if ( !error )
t1size->internal->module_data = globals;
}
return error;
}
FT_LOCAL_DEF( FT_Error )
T1_Size_Request( FT_Size t1size, /* T1_Size */
FT_Size_Request req )
{
FT_Error error;
T1_Size size = (T1_Size)t1size;
PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size );
error = FT_Request_Metrics( size->root.face, req );
if ( error )
goto Exit;
if ( funcs )
funcs->set_scale( (PSH_Globals)t1size->internal->module_data,
size->root.metrics.x_scale,
size->root.metrics.y_scale,
0, 0 );
Exit:
return error;
}
/**************************************************************************
*
* SLOT FUNCTIONS
*
*/
FT_LOCAL_DEF( void )
T1_GlyphSlot_Done( FT_GlyphSlot slot )
{
slot->internal->glyph_hints = NULL;
}
FT_LOCAL_DEF( FT_Error )
T1_GlyphSlot_Init( FT_GlyphSlot slot )
{
T1_Face face;
PSHinter_Service pshinter;
face = (T1_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;
}
/**************************************************************************
*
* FACE FUNCTIONS
*
*/
/**************************************************************************
*
* @Function:
* T1_Face_Done
*
* @Description:
* The face object destructor.
*
* @Input:
* face ::
* A typeless pointer to the face object to destroy.
*/
FT_LOCAL_DEF( void )
T1_Face_Done( FT_Face t1face ) /* T1_Face */
{
T1_Face face = (T1_Face)t1face;
FT_Memory memory;
T1_Font type1;
if ( !face )
return;
memory = face->root.memory;
type1 = &face->type1;
#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
/* release multiple masters information */
FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
if ( face->buildchar )
{
FT_FREE( face->buildchar );
face->len_buildchar = 0;
}
T1_Done_Blend( face );
face->blend = NULL;
#endif
/* release font info strings */
{
PS_FontInfo info = &type1->font_info;
FT_FREE( info->version );
FT_FREE( info->notice );
FT_FREE( info->full_name );
FT_FREE( info->family_name );
FT_FREE( info->weight );
}
/* release top dictionary */
FT_FREE( type1->charstrings_len );
FT_FREE( type1->charstrings );
FT_FREE( type1->glyph_names );
FT_FREE( type1->subrs );
FT_FREE( type1->subrs_len );
ft_hash_num_free( type1->subrs_hash, memory );
FT_FREE( type1->subrs_hash );
FT_FREE( type1->subrs_block );
FT_FREE( type1->charstrings_block );
FT_FREE( type1->glyph_names_block );
FT_FREE( type1->encoding.char_index );
FT_FREE( type1->encoding.char_name );
FT_FREE( type1->font_name );
#ifndef T1_CONFIG_OPTION_NO_AFM
/* release afm data if present */
if ( face->afm_data )
T1_Done_Metrics( memory, (AFM_FontInfo)face->afm_data );
#endif
/* release unicode map, if any */
#if 0
FT_FREE( face->unicode_map_rec.maps );
face->unicode_map_rec.num_maps = 0;
face->unicode_map = NULL;
#endif
face->root.family_name = NULL;
face->root.style_name = NULL;
}
/**************************************************************************
*
* @Function:
* T1_Face_Init
*
* @Description:
* The face object constructor.
*
* @Input:
* stream ::
* input stream where to load font data.
*
* 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 face record to build.
*
* @Return:
* FreeType error code. 0 means success.
*/
FT_LOCAL_DEF( FT_Error )
T1_Face_Init( FT_Stream stream,
FT_Face t1face, /* T1_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
T1_Face face = (T1_Face)t1face;
FT_Error error;
FT_Service_PsCMaps psnames;
PSAux_Service psaux;
T1_Font type1 = &face->type1;
PS_FontInfo info = &type1->font_info;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_UNUSED( stream );
face->root.num_faces = 1;
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
face->psnames = psnames;
face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"psaux" );
psaux = (PSAux_Service)face->psaux;
if ( !psaux )
{
FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" ));
error = FT_THROW( Missing_Module );
goto Exit;
}
face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"pshinter" );
FT_TRACE2(( "Type 1 driver\n" ));
/* open the tokenizer; this will also check the font format */
error = T1_Open_Face( face );
if ( error )
goto Exit;
FT_TRACE2(( "T1_Face_Init: %p (index %d)\n",
(void *)face,
face_index ));
/* if we just wanted to check the format, leave successfully now */
if ( face_index < 0 )
goto Exit;
/* check the face index */
if ( ( face_index & 0xFFFF ) > 0 )
{
FT_ERROR(( "T1_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 */
{
FT_Face root = (FT_Face)&face->root;
root->num_glyphs = type1->num_glyphs;
root->face_index = 0;
root->face_flags |= FT_FACE_FLAG_SCALABLE |
FT_FACE_FLAG_HORIZONTAL |
FT_FACE_FLAG_GLYPH_NAMES |
FT_FACE_FLAG_HINTER;
if ( info->is_fixed_pitch )
root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
if ( face->blend )
root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
/* The following code to extract the family and the style is very */
/* simplistic and might get some things wrong. For a full-featured */
/* algorithm you might have a look at the whitepaper given at */
/* */
/* https://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
/* get style name -- be careful, some broken fonts only */
/* have a `/FontName' dictionary entry! */
root->family_name = info->family_name;
root->style_name = NULL;
if ( root->family_name )
{
char* full = info->full_name;
char* family = root->family_name;
if ( full )
{
FT_Bool the_same = TRUE;
while ( *full )
{
if ( *full == *family )
{
family++;
full++;
}
else
{
if ( *full == ' ' || *full == '-' )
full++;
else if ( *family == ' ' || *family == '-' )
family++;
else
{
the_same = FALSE;
if ( !*family )
root->style_name = full;
break;
}
}
}
if ( the_same )
root->style_name = (char *)"Regular";
}
}
else
{
/* do we have a `/FontName'? */
if ( type1->font_name )
root->family_name = type1->font_name;
}
if ( !root->style_name )
{
if ( info->weight )
root->style_name = info->weight;
else
/* assume `Regular' style because we don't know better */
root->style_name = (char *)"Regular";
}
/* compute style flags */
root->style_flags = 0;
if ( info->italic_angle )
root->style_flags |= FT_STYLE_FLAG_ITALIC;
if ( info->weight )
{
if ( !ft_strcmp( info->weight, "Bold" ) ||
!ft_strcmp( info->weight, "Black" ) )
root->style_flags |= FT_STYLE_FLAG_BOLD;
}
/* no embedded bitmap support */
root->num_fixed_sizes = 0;
root->available_sizes = NULL;
root->bbox.xMin = type1->font_bbox.xMin >> 16;
root->bbox.yMin = type1->font_bbox.yMin >> 16;
/* no `U' suffix here to 0xFFFF! */
root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16;
root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16;
/* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */
if ( !root->units_per_EM )
root->units_per_EM = 1000;
root->ascender = (FT_Short)( root->bbox.yMax );
root->descender = (FT_Short)( root->bbox.yMin );
root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
if ( root->height < root->ascender - root->descender )
root->height = (FT_Short)( root->ascender - root->descender );
/* now compute the maximum advance width */
root->max_advance_width =
(FT_Short)( root->bbox.xMax );
{
FT_Pos max_advance;
error = T1_Compute_Max_Advance( face, &max_advance );
/* in case of error, keep the standard width */
if ( !error )
root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance );
else
error = FT_Err_Ok; /* clear error */
}
root->max_advance_height = root->height;
root->underline_position = (FT_Short)info->underline_position;
root->underline_thickness = (FT_Short)info->underline_thickness;
}
{
FT_Face root = &face->root;
if ( psnames )
{
FT_CharMapRec charmap;
T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
FT_CMap_Class clazz;
charmap.face = root;
/* first of all, try to synthesize a Unicode charmap */
charmap.platform_id = TT_PLATFORM_MICROSOFT;
charmap.encoding_id = TT_MS_ID_UNICODE_CS;
charmap.encoding = FT_ENCODING_UNICODE;
error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
if ( error &&
FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) &&
FT_ERR_NEQ( error, Unimplemented_Feature ) )
goto Exit;
error = FT_Err_Ok;
/* now, generate an Adobe Standard encoding when appropriate */
charmap.platform_id = TT_PLATFORM_ADOBE;
clazz = NULL;
switch ( type1->encoding_type )
{
case T1_ENCODING_TYPE_STANDARD:
charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
charmap.encoding_id = TT_ADOBE_ID_STANDARD;
clazz = cmap_classes->standard;
break;
case T1_ENCODING_TYPE_EXPERT:
charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
charmap.encoding_id = TT_ADOBE_ID_EXPERT;
clazz = cmap_classes->expert;
break;
case T1_ENCODING_TYPE_ARRAY:
charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
clazz = cmap_classes->custom;
break;
case T1_ENCODING_TYPE_ISOLATIN1:
charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
clazz = cmap_classes->unicode;
break;
default:
;
}
if ( clazz )
error = FT_CMap_New( clazz, NULL, &charmap, NULL );
}
}
Exit:
return error;
}
/**************************************************************************
*
* @Function:
* T1_Driver_Init
*
* @Description:
* Initializes a given Type 1 driver object.
*
* @Input:
* driver ::
* A handle to the target driver object.
*
* @Return:
* FreeType error code. 0 means success.
*/
FT_LOCAL_DEF( FT_Error )
T1_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:
* T1_Driver_Done
*
* @Description:
* Finalizes a given Type 1 driver.
*
* @Input:
* driver ::
* A handle to the target Type 1 driver.
*/
FT_LOCAL_DEF( void )
T1_Driver_Done( FT_Module driver )
{
FT_UNUSED( driver );
}
/* END */