ref: ca46bc0cf22eb72e9fdc6782337715d0ac2bbd9e
dir: /src/type1/t1driver.c/
/****************************************************************************
*
* t1driver.c
*
* Type 1 driver interface (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 "t1driver.h"
#include "t1gload.h"
#include "t1load.h"
#include "t1errors.h"
#ifndef T1_CONFIG_OPTION_NO_AFM
#include "t1afm.h"
#endif
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftstream.h>
#include <freetype/internal/fthash.h>
#include <freetype/internal/ftpsprop.h>
#include <freetype/ftdriver.h>
#include <freetype/internal/services/svmm.h>
#include <freetype/internal/services/svgldict.h>
#include <freetype/internal/services/svfntfmt.h>
#include <freetype/internal/services/svpostnm.h>
#include <freetype/internal/services/svpscmap.h>
#include <freetype/internal/services/svpsinfo.h>
#include <freetype/internal/services/svprop.h>
#include <freetype/internal/services/svkern.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 t1driver
/*
* GLYPH DICT SERVICE
*
*/
static FT_Error
t1_get_glyph_name( T1_Face face,
FT_UInt glyph_index,
FT_Pointer buffer,
FT_UInt buffer_max )
{
FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max );
return FT_Err_Ok;
}
static FT_UInt
t1_get_name_index( T1_Face face,
const FT_String* glyph_name )
{
FT_Int i;
for ( i = 0; i < face->type1.num_glyphs; i++ )
{
FT_String* gname = face->type1.glyph_names[i];
if ( !ft_strcmp( glyph_name, gname ) )
return (FT_UInt)i;
}
return 0;
}
static const FT_Service_GlyphDictRec t1_service_glyph_dict =
{
(FT_GlyphDict_GetNameFunc) t1_get_glyph_name, /* get_name */
(FT_GlyphDict_NameIndexFunc)t1_get_name_index /* name_index */
};
/*
* POSTSCRIPT NAME SERVICE
*
*/
static const char*
t1_get_ps_name( T1_Face face )
{
return (const char*) face->type1.font_name;
}
static const FT_Service_PsFontNameRec t1_service_ps_name =
{
(FT_PsName_GetFunc)t1_get_ps_name /* get_ps_font_name */
};
/*
* MULTIPLE MASTERS SERVICE
*
*/
#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
static const FT_Service_MultiMastersRec t1_service_multi_masters =
{
(FT_Get_MM_Func) T1_Get_Multi_Master, /* get_mm */
(FT_Set_MM_Design_Func) T1_Set_MM_Design, /* set_mm_design */
(FT_Set_MM_Blend_Func) T1_Set_MM_Blend, /* set_mm_blend */
(FT_Get_MM_Blend_Func) T1_Get_MM_Blend, /* get_mm_blend */
(FT_Get_MM_Var_Func) T1_Get_MM_Var, /* get_mm_var */
(FT_Set_Var_Design_Func) T1_Set_Var_Design, /* set_var_design */
(FT_Get_Var_Design_Func) T1_Get_Var_Design, /* get_var_design */
(FT_Set_Instance_Func) T1_Reset_MM_Blend, /* set_instance */
(FT_Set_MM_WeightVector_Func)T1_Set_MM_WeightVector, /* set_mm_weightvector */
(FT_Get_MM_WeightVector_Func)T1_Get_MM_WeightVector, /* get_mm_weightvector */
(FT_Get_Var_Blend_Func) NULL, /* get_var_blend */
(FT_Done_Blend_Func) T1_Done_Blend /* done_blend */
};
#endif
/*
* POSTSCRIPT INFO SERVICE
*
*/
static FT_Error
t1_ps_get_font_info( FT_Face face,
PS_FontInfoRec* afont_info )
{
*afont_info = ((T1_Face)face)->type1.font_info;
return FT_Err_Ok;
}
static FT_Error
t1_ps_get_font_extra( FT_Face face,
PS_FontExtraRec* afont_extra )
{
*afont_extra = ((T1_Face)face)->type1.font_extra;
return FT_Err_Ok;
}
static FT_Int
t1_ps_has_glyph_names( FT_Face face )
{
FT_UNUSED( face );
return 1;
}
static FT_Error
t1_ps_get_font_private( FT_Face face,
PS_PrivateRec* afont_private )
{
*afont_private = ((T1_Face)face)->type1.private_dict;
return FT_Err_Ok;
}
static FT_Long
t1_ps_get_font_value( FT_Face face,
PS_Dict_Keys key,
FT_UInt idx,
void *value,
FT_Long value_len_ )
{
FT_ULong retval = 0; /* always >= 1 if valid */
FT_ULong value_len = value_len_ < 0 ? 0 : (FT_ULong)value_len_;
T1_Face t1face = (T1_Face)face;
T1_Font type1 = &t1face->type1;
switch ( key )
{
case PS_DICT_FONT_TYPE:
retval = sizeof ( type1->font_type );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->font_type;
break;
case PS_DICT_FONT_MATRIX:
if ( idx < sizeof ( type1->font_matrix ) /
sizeof ( type1->font_matrix.xx ) )
{
FT_Fixed val = 0;
retval = sizeof ( val );
if ( value && value_len >= retval )
{
switch ( idx )
{
case 0:
val = type1->font_matrix.xx;
break;
case 1:
val = type1->font_matrix.xy;
break;
case 2:
val = type1->font_matrix.yx;
break;
case 3:
val = type1->font_matrix.yy;
break;
}
*((FT_Fixed *)value) = val;
}
}
break;
case PS_DICT_FONT_BBOX:
if ( idx < sizeof ( type1->font_bbox ) /
sizeof ( type1->font_bbox.xMin ) )
{
FT_Fixed val = 0;
retval = sizeof ( val );
if ( value && value_len >= retval )
{
switch ( idx )
{
case 0:
val = type1->font_bbox.xMin;
break;
case 1:
val = type1->font_bbox.yMin;
break;
case 2:
val = type1->font_bbox.xMax;
break;
case 3:
val = type1->font_bbox.yMax;
break;
}
*((FT_Fixed *)value) = val;
}
}
break;
case PS_DICT_PAINT_TYPE:
retval = sizeof ( type1->paint_type );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->paint_type;
break;
case PS_DICT_FONT_NAME:
if ( type1->font_name )
{
retval = ft_strlen( type1->font_name ) + 1;
if ( value && value_len >= retval )
ft_memcpy( value, (void *)( type1->font_name ), retval );
}
break;
case PS_DICT_UNIQUE_ID:
retval = sizeof ( type1->private_dict.unique_id );
if ( value && value_len >= retval )
*((FT_Int *)value) = type1->private_dict.unique_id;
break;
case PS_DICT_NUM_CHAR_STRINGS:
retval = sizeof ( type1->num_glyphs );
if ( value && value_len >= retval )
*((FT_Int *)value) = type1->num_glyphs;
break;
case PS_DICT_CHAR_STRING_KEY:
if ( idx < (FT_UInt)type1->num_glyphs )
{
retval = ft_strlen( type1->glyph_names[idx] ) + 1;
if ( value && value_len >= retval )
{
ft_memcpy( value, (void *)( type1->glyph_names[idx] ), retval );
((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
}
}
break;
case PS_DICT_CHAR_STRING:
if ( idx < (FT_UInt)type1->num_glyphs )
{
retval = type1->charstrings_len[idx] + 1;
if ( value && value_len >= retval )
{
ft_memcpy( value, (void *)( type1->charstrings[idx] ),
retval - 1 );
((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
}
}
break;
case PS_DICT_ENCODING_TYPE:
retval = sizeof ( type1->encoding_type );
if ( value && value_len >= retval )
*((T1_EncodingType *)value) = type1->encoding_type;
break;
case PS_DICT_ENCODING_ENTRY:
if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY &&
idx < (FT_UInt)type1->encoding.num_chars )
{
retval = ft_strlen( type1->encoding.char_name[idx] ) + 1;
if ( value && value_len >= retval )
{
ft_memcpy( value, (void *)( type1->encoding.char_name[idx] ),
retval - 1 );
((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
}
}
break;
case PS_DICT_NUM_SUBRS:
retval = sizeof ( type1->num_subrs );
if ( value && value_len >= retval )
*((FT_Int *)value) = type1->num_subrs;
break;
case PS_DICT_SUBR:
{
FT_Bool ok = 0;
if ( type1->subrs_hash )
{
/* convert subr index to array index */
size_t* val = ft_hash_num_lookup( (FT_Int)idx,
type1->subrs_hash );
if ( val )
{
idx = *val;
ok = 1;
}
}
else
{
if ( idx < (FT_UInt)type1->num_subrs )
ok = 1;
}
if ( ok && type1->subrs )
{
retval = type1->subrs_len[idx] + 1;
if ( value && value_len >= retval )
{
ft_memcpy( value, (void *)( type1->subrs[idx] ), retval - 1 );
((FT_Char *)value)[retval - 1] = (FT_Char)'\0';
}
}
}
break;
case PS_DICT_STD_HW:
retval = sizeof ( type1->private_dict.standard_width[0] );
if ( value && value_len >= retval )
*((FT_UShort *)value) = type1->private_dict.standard_width[0];
break;
case PS_DICT_STD_VW:
retval = sizeof ( type1->private_dict.standard_height[0] );
if ( value && value_len >= retval )
*((FT_UShort *)value) = type1->private_dict.standard_height[0];
break;
case PS_DICT_NUM_BLUE_VALUES:
retval = sizeof ( type1->private_dict.num_blue_values );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->private_dict.num_blue_values;
break;
case PS_DICT_BLUE_VALUE:
if ( idx < type1->private_dict.num_blue_values )
{
retval = sizeof ( type1->private_dict.blue_values[idx] );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->private_dict.blue_values[idx];
}
break;
case PS_DICT_BLUE_SCALE:
retval = sizeof ( type1->private_dict.blue_scale );
if ( value && value_len >= retval )
*((FT_Fixed *)value) = type1->private_dict.blue_scale;
break;
case PS_DICT_BLUE_FUZZ:
retval = sizeof ( type1->private_dict.blue_fuzz );
if ( value && value_len >= retval )
*((FT_Int *)value) = type1->private_dict.blue_fuzz;
break;
case PS_DICT_BLUE_SHIFT:
retval = sizeof ( type1->private_dict.blue_shift );
if ( value && value_len >= retval )
*((FT_Int *)value) = type1->private_dict.blue_shift;
break;
case PS_DICT_NUM_OTHER_BLUES:
retval = sizeof ( type1->private_dict.num_other_blues );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->private_dict.num_other_blues;
break;
case PS_DICT_OTHER_BLUE:
if ( idx < type1->private_dict.num_other_blues )
{
retval = sizeof ( type1->private_dict.other_blues[idx] );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->private_dict.other_blues[idx];
}
break;
case PS_DICT_NUM_FAMILY_BLUES:
retval = sizeof ( type1->private_dict.num_family_blues );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->private_dict.num_family_blues;
break;
case PS_DICT_FAMILY_BLUE:
if ( idx < type1->private_dict.num_family_blues )
{
retval = sizeof ( type1->private_dict.family_blues[idx] );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->private_dict.family_blues[idx];
}
break;
case PS_DICT_NUM_FAMILY_OTHER_BLUES:
retval = sizeof ( type1->private_dict.num_family_other_blues );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->private_dict.num_family_other_blues;
break;
case PS_DICT_FAMILY_OTHER_BLUE:
if ( idx < type1->private_dict.num_family_other_blues )
{
retval = sizeof ( type1->private_dict.family_other_blues[idx] );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->private_dict.family_other_blues[idx];
}
break;
case PS_DICT_NUM_STEM_SNAP_H:
retval = sizeof ( type1->private_dict.num_snap_widths );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->private_dict.num_snap_widths;
break;
case PS_DICT_STEM_SNAP_H:
if ( idx < type1->private_dict.num_snap_widths )
{
retval = sizeof ( type1->private_dict.snap_widths[idx] );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->private_dict.snap_widths[idx];
}
break;
case PS_DICT_NUM_STEM_SNAP_V:
retval = sizeof ( type1->private_dict.num_snap_heights );
if ( value && value_len >= retval )
*((FT_Byte *)value) = type1->private_dict.num_snap_heights;
break;
case PS_DICT_STEM_SNAP_V:
if ( idx < type1->private_dict.num_snap_heights )
{
retval = sizeof ( type1->private_dict.snap_heights[idx] );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->private_dict.snap_heights[idx];
}
break;
case PS_DICT_RND_STEM_UP:
retval = sizeof ( type1->private_dict.round_stem_up );
if ( value && value_len >= retval )
*((FT_Bool *)value) = type1->private_dict.round_stem_up;
break;
case PS_DICT_FORCE_BOLD:
retval = sizeof ( type1->private_dict.force_bold );
if ( value && value_len >= retval )
*((FT_Bool *)value) = type1->private_dict.force_bold;
break;
case PS_DICT_MIN_FEATURE:
if ( idx < sizeof ( type1->private_dict.min_feature ) /
sizeof ( type1->private_dict.min_feature[0] ) )
{
retval = sizeof ( type1->private_dict.min_feature[idx] );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->private_dict.min_feature[idx];
}
break;
case PS_DICT_LEN_IV:
retval = sizeof ( type1->private_dict.lenIV );
if ( value && value_len >= retval )
*((FT_Int *)value) = type1->private_dict.lenIV;
break;
case PS_DICT_PASSWORD:
retval = sizeof ( type1->private_dict.password );
if ( value && value_len >= retval )
*((FT_Long *)value) = type1->private_dict.password;
break;
case PS_DICT_LANGUAGE_GROUP:
retval = sizeof ( type1->private_dict.language_group );
if ( value && value_len >= retval )
*((FT_Long *)value) = type1->private_dict.language_group;
break;
case PS_DICT_IS_FIXED_PITCH:
retval = sizeof ( type1->font_info.is_fixed_pitch );
if ( value && value_len >= retval )
*((FT_Bool *)value) = type1->font_info.is_fixed_pitch;
break;
case PS_DICT_UNDERLINE_POSITION:
retval = sizeof ( type1->font_info.underline_position );
if ( value && value_len >= retval )
*((FT_Short *)value) = type1->font_info.underline_position;
break;
case PS_DICT_UNDERLINE_THICKNESS:
retval = sizeof ( type1->font_info.underline_thickness );
if ( value && value_len >= retval )
*((FT_UShort *)value) = type1->font_info.underline_thickness;
break;
case PS_DICT_FS_TYPE:
retval = sizeof ( type1->font_extra.fs_type );
if ( value && value_len >= retval )
*((FT_UShort *)value) = type1->font_extra.fs_type;
break;
case PS_DICT_VERSION:
if ( type1->font_info.version )
{
retval = ft_strlen( type1->font_info.version ) + 1;
if ( value && value_len >= retval )
ft_memcpy( value, (void *)( type1->font_info.version ), retval );
}
break;
case PS_DICT_NOTICE:
if ( type1->font_info.notice )
{
retval = ft_strlen( type1->font_info.notice ) + 1;
if ( value && value_len >= retval )
ft_memcpy( value, (void *)( type1->font_info.notice ), retval );
}
break;
case PS_DICT_FULL_NAME:
if ( type1->font_info.full_name )
{
retval = ft_strlen( type1->font_info.full_name ) + 1;
if ( value && value_len >= retval )
ft_memcpy( value, (void *)( type1->font_info.full_name ), retval );
}
break;
case PS_DICT_FAMILY_NAME:
if ( type1->font_info.family_name )
{
retval = ft_strlen( type1->font_info.family_name ) + 1;
if ( value && value_len >= retval )
ft_memcpy( value, (void *)( type1->font_info.family_name ),
retval );
}
break;
case PS_DICT_WEIGHT:
if ( type1->font_info.weight )
{
retval = ft_strlen( type1->font_info.weight ) + 1;
if ( value && value_len >= retval )
ft_memcpy( value, (void *)( type1->font_info.weight ), retval );
}
break;
case PS_DICT_ITALIC_ANGLE:
retval = sizeof ( type1->font_info.italic_angle );
if ( value && value_len >= retval )
*((FT_Long *)value) = type1->font_info.italic_angle;
break;
}
return retval == 0 ? -1 : (FT_Long)retval;
}
static const FT_Service_PsInfoRec t1_service_ps_info =
{
(PS_GetFontInfoFunc) t1_ps_get_font_info, /* ps_get_font_info */
(PS_GetFontExtraFunc) t1_ps_get_font_extra, /* ps_get_font_extra */
(PS_HasGlyphNamesFunc) t1_ps_has_glyph_names, /* ps_has_glyph_names */
(PS_GetFontPrivateFunc)t1_ps_get_font_private, /* ps_get_font_private */
(PS_GetFontValueFunc) t1_ps_get_font_value, /* ps_get_font_value */
};
#ifndef T1_CONFIG_OPTION_NO_AFM
static const FT_Service_KerningRec t1_service_kerning =
{
T1_Get_Track_Kerning, /* get_track */
};
#endif
/*
* PROPERTY SERVICE
*
*/
FT_DEFINE_SERVICE_PROPERTIESREC(
t1_service_properties,
(FT_Properties_SetFunc)ps_property_set, /* set_property */
(FT_Properties_GetFunc)ps_property_get ) /* get_property */
/*
* SERVICE LIST
*
*/
static const FT_ServiceDescRec t1_services[] =
{
{ FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t1_service_ps_name },
{ FT_SERVICE_ID_GLYPH_DICT, &t1_service_glyph_dict },
{ FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_1 },
{ FT_SERVICE_ID_POSTSCRIPT_INFO, &t1_service_ps_info },
{ FT_SERVICE_ID_PROPERTIES, &t1_service_properties },
#ifndef T1_CONFIG_OPTION_NO_AFM
{ FT_SERVICE_ID_KERNING, &t1_service_kerning },
#endif
#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
{ FT_SERVICE_ID_MULTI_MASTERS, &t1_service_multi_masters },
#endif
{ NULL, NULL }
};
FT_CALLBACK_DEF( FT_Module_Interface )
Get_Interface( FT_Module module,
const FT_String* t1_interface )
{
FT_UNUSED( module );
return ft_service_list_lookup( t1_services, t1_interface );
}
#ifndef T1_CONFIG_OPTION_NO_AFM
/**************************************************************************
*
* @Function:
* Get_Kerning
*
* @Description:
* A driver method used to return the kerning vector between two
* glyphs of the same face.
*
* @Input:
* face ::
* A handle to the source face object.
*
* left_glyph ::
* The index of the left glyph in the kern pair.
*
* right_glyph ::
* The index of the right glyph in the kern pair.
*
* @Output:
* kerning ::
* The kerning vector. This is in font units for
* scalable formats, and in pixels for fixed-sizes
* formats.
*
* @Return:
* FreeType error code. 0 means success.
*
* @Note:
* Only horizontal layouts (left-to-right & right-to-left) are
* supported by this function. Other layouts, or more sophisticated
* kernings are out of scope of this method (the basic driver
* interface is meant to be simple).
*
* They can be implemented by format-specific interfaces.
*/
static FT_Error
Get_Kerning( FT_Face t1face, /* T1_Face */
FT_UInt left_glyph,
FT_UInt right_glyph,
FT_Vector* kerning )
{
T1_Face face = (T1_Face)t1face;
kerning->x = 0;
kerning->y = 0;
if ( face->afm_data )
T1_Get_Kerning( (AFM_FontInfo)face->afm_data,
left_glyph,
right_glyph,
kerning );
return FT_Err_Ok;
}
#endif /* T1_CONFIG_OPTION_NO_AFM */
FT_CALLBACK_TABLE_DEF
const FT_Driver_ClassRec t1_driver_class =
{
{
FT_MODULE_FONT_DRIVER |
FT_MODULE_DRIVER_SCALABLE |
FT_MODULE_DRIVER_HAS_HINTER,
sizeof ( PS_DriverRec ),
"type1",
0x10000L,
0x20000L,
NULL, /* module-specific interface */
T1_Driver_Init, /* FT_Module_Constructor module_init */
T1_Driver_Done, /* FT_Module_Destructor module_done */
Get_Interface, /* FT_Module_Requester get_interface */
},
sizeof ( T1_FaceRec ),
sizeof ( T1_SizeRec ),
sizeof ( T1_GlyphSlotRec ),
T1_Face_Init, /* FT_Face_InitFunc init_face */
T1_Face_Done, /* FT_Face_DoneFunc done_face */
T1_Size_Init, /* FT_Size_InitFunc init_size */
T1_Size_Done, /* FT_Size_DoneFunc done_size */
T1_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */
T1_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */
T1_Load_Glyph, /* FT_Slot_LoadFunc load_glyph */
#ifdef T1_CONFIG_OPTION_NO_AFM
NULL, /* FT_Face_GetKerningFunc get_kerning */
NULL, /* FT_Face_AttachFunc attach_file */
#else
Get_Kerning, /* FT_Face_GetKerningFunc get_kerning */
T1_Read_Metrics, /* FT_Face_AttachFunc attach_file */
#endif
T1_Get_Advances, /* FT_Face_GetAdvancesFunc get_advances */
T1_Size_Request, /* FT_Size_RequestFunc request_size */
NULL /* FT_Size_SelectFunc select_size */
};
/* END */