ref: 61870c24fae357b78029ce54be0c004e1ffdb3c7
dir: /libfreetype/t42objs.c/
/***************************************************************************/
/* */
/* t42objs.c */
/* */
/* Type 42 objects manager (body). */
/* */
/* Copyright 2002 by Roberto Alameda. */
/* */
/* 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 "t42objs.h"
#include "t42parse.h"
#include "t42error.h"
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_LIST_H
#undef FT_COMPONENT
#define FT_COMPONENT trace_t42
static FT_Error
T42_Open_Face( T42_Face face )
{
T42_LoaderRec loader;
T42_Parser parser;
T1_Font type1 = &face->type1;
FT_Memory memory = face->root.memory;
FT_Error error;
PSAux_Service psaux = (PSAux_Service)face->psaux;
t42_loader_init( &loader, face );
parser = &loader.parser;
if ( FT_ALLOC( face->ttf_data, 12 ) )
goto Exit;
error = t42_parser_init( parser,
face->root.stream,
memory,
psaux);
if ( error )
goto Exit;
error = t42_parse_dict( face, &loader, parser->base_dict, parser->base_len );
if ( type1->font_type != 42 )
{
error = T42_Err_Unknown_File_Format;
goto Exit;
}
/* now, propagate the charstrings and glyphnames tables */
/* to the Type1 data */
type1->num_glyphs = loader.num_glyphs;
if ( !loader.charstrings.init ) {
FT_ERROR(( "T42_Open_Face: no charstrings array in face!\n" ));
error = T42_Err_Invalid_File_Format;
}
loader.charstrings.init = 0;
type1->charstrings_block = loader.charstrings.block;
type1->charstrings = loader.charstrings.elements;
type1->charstrings_len = loader.charstrings.lengths;
/* we copy the glyph names `block' and `elements' fields; */
/* the `lengths' field must be released later */
type1->glyph_names_block = loader.glyph_names.block;
type1->glyph_names = (FT_String**)loader.glyph_names.elements;
loader.glyph_names.block = 0;
loader.glyph_names.elements = 0;
/* we must now build type1.encoding when we have a custom array */
if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY )
{
FT_Int charcode, idx, min_char, max_char;
FT_Byte* char_name;
FT_Byte* glyph_name;
/* OK, we do the following: for each element in the encoding */
/* table, look up the index of the glyph having the same name */
/* as defined in the CharStrings array. */
/* The index is then stored in type1.encoding.char_index, and */
/* the name in type1.encoding.char_name */
min_char = +32000;
max_char = -32000;
charcode = 0;
for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
{
type1->encoding.char_index[charcode] = 0;
type1->encoding.char_name [charcode] = (char *)".notdef";
char_name = loader.encoding_table.elements[charcode];
if ( char_name )
for ( idx = 0; idx < type1->num_glyphs; idx++ )
{
glyph_name = (FT_Byte*)type1->glyph_names[idx];
if ( ft_strcmp( (const char*)char_name,
(const char*)glyph_name ) == 0 )
{
type1->encoding.char_index[charcode] = (FT_UShort)idx;
type1->encoding.char_name [charcode] = (char*)glyph_name;
/* Change min/max encoded char only if glyph name is */
/* not /.notdef */
if ( ft_strcmp( (const char*)".notdef",
(const char*)glyph_name ) != 0 )
{
if ( charcode < min_char ) min_char = charcode;
if ( charcode > max_char ) max_char = charcode;
}
break;
}
}
}
type1->encoding.code_first = min_char;
type1->encoding.code_last = max_char;
type1->encoding.num_chars = loader.num_chars;
}
Exit:
t42_loader_done( &loader );
return error;
}
/***************** Driver Functions *************/
FT_LOCAL_DEF( FT_Error )
T42_Face_Init( FT_Stream stream,
T42_Face face,
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
FT_Error error;
PSNames_Service psnames;
PSAux_Service psaux;
FT_Face root = (FT_Face)&face->root;
FT_UNUSED( num_params );
FT_UNUSED( params );
FT_UNUSED( face_index );
FT_UNUSED( stream );
face->ttf_face = NULL;
face->root.num_faces = 1;
face->psnames = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"psnames" );
psnames = (PSNames_Service)face->psnames;
face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
"psaux" );
psaux = (PSAux_Service)face->psaux;
/* open the tokenizer, this will also check the font format */
error = T42_Open_Face( face );
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 */
if ( face_index != 0 )
{
FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
error = T42_Err_Invalid_Argument;
goto Exit;
}
/* Now, load the font program into the face object */
/* Init the face object fields */
/* Now set up root face fields */
root->num_glyphs = face->type1.num_glyphs;
root->num_charmaps = 0;
root->face_index = face_index;
root->face_flags = FT_FACE_FLAG_SCALABLE;
root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
root->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
if ( face->type1.font_info.is_fixed_pitch )
root->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! */
root->family_name = face->type1.font_info.family_name;
if ( root->family_name )
{
char* full = face->type1.font_info.full_name;
char* family = root->family_name;
if ( full )
{
while ( *family && *full == *family )
{
family++;
full++;
}
root->style_name = ( *full == ' ' ? full + 1
: (char *)"Regular" );
}
else
root->style_name = (char *)"Regular";
}
else
{
/* do we have a `/FontName'? */
if ( face->type1.font_name )
{
root->family_name = face->type1.font_name;
root->style_name = (char *)"Regular";
}
}
/* no embedded bitmap support */
root->num_fixed_sizes = 0;
root->available_sizes = 0;
/* Load the TTF font embedded in the T42 font */
error = FT_New_Memory_Face( FT_FACE_LIBRARY( face ),
face->ttf_data,
face->ttf_size,
0,
&face->ttf_face );
if ( error )
goto Exit;
FT_Done_Size( face->ttf_face->size );
/* Ignore info in FontInfo dictionary and use the info from the */
/* loaded TTF font. The PostScript interpreter also ignores it. */
root->bbox = face->ttf_face->bbox;
root->units_per_EM = face->ttf_face->units_per_EM;
root->ascender = face->ttf_face->ascender;
root->descender = face->ttf_face->descender;
root->height = face->ttf_face->height;
root->max_advance_width = face->ttf_face->max_advance_width;
root->max_advance_height = face->ttf_face->max_advance_height;
root->underline_position = face->type1.font_info.underline_position;
root->underline_thickness = face->type1.font_info.underline_thickness;
root->internal->max_points = 0;
root->internal->max_contours = 0;
/* compute style flags */
root->style_flags = 0;
if ( face->type1.font_info.italic_angle )
root->style_flags |= FT_STYLE_FLAG_ITALIC;
if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
root->style_flags |= FT_STYLE_FLAG_BOLD;
if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
root->face_flags |= FT_FACE_FLAG_VERTICAL;
{
if ( psnames && psaux )
{
FT_CharMapRec charmap;
T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
FT_CMap_Class clazz;
charmap.face = root;
/* first of all, try to synthetize a Unicode charmap */
charmap.platform_id = 3;
charmap.encoding_id = 1;
charmap.encoding = FT_ENCODING_UNICODE;
FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
/* now, generate an Adobe Standard encoding when appropriate */
charmap.platform_id = 7;
clazz = NULL;
switch ( face->type1.encoding_type )
{
case T1_ENCODING_TYPE_STANDARD:
charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
charmap.encoding_id = 0;
clazz = cmap_classes->standard;
break;
case T1_ENCODING_TYPE_EXPERT:
charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
charmap.encoding_id = 1;
clazz = cmap_classes->expert;
break;
case T1_ENCODING_TYPE_ARRAY:
charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
charmap.encoding_id = 2;
clazz = cmap_classes->custom;
break;
case T1_ENCODING_TYPE_ISOLATIN1:
charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
charmap.encoding_id = 3;
clazz = cmap_classes->unicode;
break;
default:
;
}
if ( clazz )
FT_CMap_New( clazz, NULL, &charmap, NULL );
#if 0
/* Select default charmap */
if (root->num_charmaps)
root->charmap = root->charmaps[0];
#endif
}
}
Exit:
return error;
}
FT_LOCAL_DEF( void )
T42_Face_Done( T42_Face face )
{
T1_Font type1;
PS_FontInfo info;
FT_Memory memory;
if ( face )
{
type1 = &face->type1;
info = &type1->font_info;
memory = face->root.memory;
/* delete internal ttf face prior to freeing face->ttf_data */
if ( face->ttf_face )
FT_Done_Face( face->ttf_face );
/* release font info strings */
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->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 );
FT_FREE( face->ttf_data );
#if 0
/* release afm data if present */
if ( face->afm_data )
T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
#endif
/* release unicode map, if any */
FT_FREE( face->unicode_map.maps );
face->unicode_map.num_maps = 0;
face->root.family_name = 0;
face->root.style_name = 0;
}
}
/*************************************************************************/
/* */
/* <Function> */
/* T42_Driver_Init */
/* */
/* <Description> */
/* Initializes a given Type 42 driver object. */
/* */
/* <Input> */
/* driver :: A handle to the target driver object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
T42_Driver_Init( T42_Driver driver )
{
FT_Module ttmodule;
ttmodule = FT_Get_Module( FT_MODULE(driver)->library, "truetype" );
driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;
return T42_Err_Ok;
}
FT_LOCAL_DEF( void )
T42_Driver_Done( T42_Driver driver )
{
FT_UNUSED( driver );
}
FT_LOCAL_DEF( FT_Error )
T42_Size_Init( T42_Size size )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
FT_Size ttsize;
FT_Error error = T42_Err_Ok;
error = FT_New_Size( t42face->ttf_face, &ttsize );
size->ttsize = ttsize;
FT_Activate_Size( ttsize );
return error;
}
FT_LOCAL_DEF( void )
T42_Size_Done( T42_Size size )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
FT_ListNode node;
node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize );
if ( node )
{
FT_Done_Size( size->ttsize );
size->ttsize = NULL;
}
}
FT_LOCAL_DEF( FT_Error )
T42_GlyphSlot_Init( T42_GlyphSlot slot )
{
FT_Face face = slot->root.face;
T42_Face t42face = (T42_Face)face;
FT_GlyphSlot ttslot;
FT_Error error = T42_Err_Ok;
if ( face->glyph == NULL )
{
/* First glyph slot for this face */
slot->ttslot = t42face->ttf_face->glyph;
}
else
{
error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot );
slot->ttslot = ttslot;
}
return error;
}
FT_LOCAL_DEF( void )
T42_GlyphSlot_Done( T42_GlyphSlot slot )
{
FT_Face face = slot->root.face;
T42_Face t42face = (T42_Face)face;
FT_GlyphSlot cur = t42face->ttf_face->glyph;
while ( cur )
{
if ( cur == slot->ttslot )
{
FT_Done_GlyphSlot( slot->ttslot );
break;
}
cur = cur->next;
}
}
FT_LOCAL_DEF( FT_Error )
T42_Size_SetChars( T42_Size size,
FT_F26Dot6 char_width,
FT_F26Dot6 char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
FT_Activate_Size(size->ttsize);
return FT_Set_Char_Size( t42face->ttf_face,
char_width,
char_height,
horz_resolution,
vert_resolution );
}
FT_LOCAL_DEF( FT_Error )
T42_Size_SetPixels( T42_Size size,
FT_UInt pixel_width,
FT_UInt pixel_height )
{
FT_Face face = size->root.face;
T42_Face t42face = (T42_Face)face;
FT_Activate_Size(size->ttsize);
return FT_Set_Pixel_Sizes( t42face->ttf_face,
pixel_width,
pixel_height );
}
static void
ft_glyphslot_clear( FT_GlyphSlot slot )
{
/* free bitmap if needed */
if ( slot->flags & FT_GLYPH_OWN_BITMAP )
{
FT_Memory memory = FT_FACE_MEMORY( slot->face );
FT_FREE( slot->bitmap.buffer );
slot->flags &= ~FT_GLYPH_OWN_BITMAP;
}
/* clear all public fields in the glyph slot */
FT_ZERO( &slot->metrics );
FT_ZERO( &slot->outline );
FT_ZERO( &slot->bitmap );
slot->bitmap_left = 0;
slot->bitmap_top = 0;
slot->num_subglyphs = 0;
slot->subglyphs = 0;
slot->control_data = 0;
slot->control_len = 0;
slot->other = 0;
slot->format = FT_GLYPH_FORMAT_NONE;
slot->linearHoriAdvance = 0;
slot->linearVertAdvance = 0;
}
FT_LOCAL_DEF( FT_Error )
T42_GlyphSlot_Load( FT_GlyphSlot glyph,
FT_Size size,
FT_Int glyph_index,
FT_Int32 load_flags )
{
FT_Error error;
T42_GlyphSlot t42slot = (T42_GlyphSlot)glyph;
T42_Size t42size = (T42_Size)size;
FT_Driver_Class ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz;
ft_glyphslot_clear( t42slot->ttslot );
error = ttclazz->load_glyph( t42slot->ttslot,
t42size->ttsize,
glyph_index,
load_flags | FT_LOAD_NO_BITMAP );
if ( !error )
{
glyph->metrics = t42slot->ttslot->metrics;
glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance;
glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance;
glyph->format = t42slot->ttslot->format;
glyph->outline = t42slot->ttslot->outline;
glyph->bitmap = t42slot->ttslot->bitmap;
glyph->bitmap_left = t42slot->ttslot->bitmap_left;
glyph->bitmap_top = t42slot->ttslot->bitmap_top;
glyph->num_subglyphs = t42slot->ttslot->num_subglyphs;
glyph->subglyphs = t42slot->ttslot->subglyphs;
glyph->control_data = t42slot->ttslot->control_data;
glyph->control_len = t42slot->ttslot->control_len;
}
return error;
}
/* END */