577 lines
18 KiB
C
577 lines
18 KiB
C
/***************************************************************************/
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/* */
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/* cffobjs.c */
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/* */
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/* OpenType objects manager (body). */
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/* */
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/* Copyright 1996-2001, 2002 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_CALC_H
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#include FT_INTERNAL_STREAM_H
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#include FT_ERRORS_H
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#include FT_TRUETYPE_IDS_H
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#include FT_TRUETYPE_TAGS_H
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#include FT_INTERNAL_SFNT_H
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#include FT_INTERNAL_POSTSCRIPT_NAMES_H
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#include FT_INTERNAL_POSTSCRIPT_HINTS_H
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#include "cffobjs.h"
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#include "cffload.h"
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#include "cffcmap.h"
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#include "cfferrs.h"
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_cffobjs
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/*************************************************************************/
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/* */
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/* SIZE FUNCTIONS */
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/* */
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/* Note that we store the global hints in the size's "internal" root */
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/* field. */
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/* */
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/*************************************************************************/
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static PSH_Globals_Funcs
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cff_size_get_globals_funcs( CFF_Size size )
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{
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CFF_Face face = (CFF_Face)size->face;
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CFF_Font font = (CFF_FontRec *)face->extra.data;
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PSHinter_Service pshinter = (PSHinter_Service)font->pshinter;
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FT_Module module;
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module = FT_Get_Module( size->face->driver->root.library,
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"pshinter" );
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return ( module && pshinter && pshinter->get_globals_funcs )
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? pshinter->get_globals_funcs( module )
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: 0;
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}
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FT_LOCAL_DEF( void )
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cff_size_done( CFF_Size size )
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{
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if ( size->internal )
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{
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PSH_Globals_Funcs funcs;
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funcs = cff_size_get_globals_funcs( size );
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if ( funcs )
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funcs->destroy( (PSH_Globals)size->internal );
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size->internal = 0;
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}
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}
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FT_LOCAL_DEF( FT_Error )
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cff_size_init( CFF_Size size )
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{
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FT_Error error = 0;
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PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size );
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if ( funcs )
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{
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PSH_Globals globals;
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CFF_Face face = (CFF_Face)size->face;
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CFF_Font font = (CFF_FontRec *)face->extra.data;
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CFF_SubFont subfont = &font->top_font;
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CFF_Private cpriv = &subfont->private_dict;
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PS_PrivateRec priv;
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/* IMPORTANT: The CFF and Type1 private dictionaries have */
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/* slightly different structures; we need to */
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/* synthetize a type1 dictionary on the fly here. */
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{
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FT_UInt n, count;
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FT_MEM_SET( &priv, 0, sizeof ( priv ) );
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count = priv.num_blue_values = cpriv->num_blue_values;
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for ( n = 0; n < count; n++ )
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priv.blue_values[n] = (FT_Short)cpriv->blue_values[n];
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count = priv.num_other_blues = cpriv->num_other_blues;
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for ( n = 0; n < count; n++ )
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priv.other_blues[n] = (FT_Short)cpriv->other_blues[n];
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count = priv.num_family_blues = cpriv->num_family_blues;
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for ( n = 0; n < count; n++ )
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priv.family_blues[n] = (FT_Short)cpriv->family_blues[n];
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count = priv.num_family_other_blues = cpriv->num_family_other_blues;
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for ( n = 0; n < count; n++ )
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priv.family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n];
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priv.blue_scale = cpriv->blue_scale;
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priv.blue_shift = cpriv->blue_shift;
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priv.blue_fuzz = cpriv->blue_fuzz;
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priv.standard_width[0] = (FT_UShort)cpriv->standard_width;
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priv.standard_height[0] = (FT_UShort)cpriv->standard_height;
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count = priv.num_snap_widths = cpriv->num_snap_widths;
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for ( n = 0; n < count; n++ )
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priv.snap_widths[n] = (FT_Short)cpriv->snap_widths[n];
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count = priv.num_snap_heights = cpriv->num_snap_heights;
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for ( n = 0; n < count; n++ )
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priv.snap_heights[n] = (FT_Short)cpriv->snap_heights[n];
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priv.force_bold = cpriv->force_bold;
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priv.language_group = cpriv->language_group;
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priv.lenIV = cpriv->lenIV;
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}
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error = funcs->create( size->face->memory, &priv, &globals );
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if ( !error )
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size->internal = (FT_Size_Internal)(void*)globals;
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}
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return error;
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}
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FT_LOCAL_DEF( FT_Error )
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cff_size_reset( CFF_Size size )
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{
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PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size );
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FT_Error error = 0;
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if ( funcs )
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error = funcs->set_scale( (PSH_Globals)size->internal,
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size->metrics.x_scale,
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size->metrics.y_scale,
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0, 0 );
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return error;
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}
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/*************************************************************************/
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/* */
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/* SLOT FUNCTIONS */
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/* */
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/*************************************************************************/
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FT_LOCAL_DEF( void )
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cff_slot_done( CFF_GlyphSlot slot )
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{
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slot->root.internal->glyph_hints = 0;
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}
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FT_LOCAL_DEF( FT_Error )
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cff_slot_init( CFF_GlyphSlot slot )
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{
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CFF_Face face = (CFF_Face)slot->root.face;
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CFF_Font font = (CFF_FontRec *)face->extra.data;
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PSHinter_Service pshinter = (PSHinter_Service)font->pshinter;
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if ( pshinter )
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{
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FT_Module module;
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module = FT_Get_Module( slot->root.face->driver->root.library,
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"pshinter" );
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if ( module )
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{
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T2_Hints_Funcs funcs;
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funcs = pshinter->get_t2_funcs( module );
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slot->root.internal->glyph_hints = (void*)funcs;
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}
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}
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return 0;
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}
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/*************************************************************************/
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/* */
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/* FACE FUNCTIONS */
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/* */
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/*************************************************************************/
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static FT_String*
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cff_strcpy( FT_Memory memory,
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const FT_String* source )
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{
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FT_Error error;
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FT_String* result = 0;
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FT_Int len = (FT_Int)ft_strlen( source );
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if ( !FT_ALLOC( result, len + 1 ) )
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{
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FT_MEM_COPY( result, source, len );
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result[len] = 0;
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}
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FT_UNUSED( error );
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return result;
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}
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FT_LOCAL_DEF( FT_Error )
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cff_face_init( FT_Stream stream,
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CFF_Face face,
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FT_Int face_index,
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FT_Int num_params,
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FT_Parameter* params )
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{
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FT_Error error;
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SFNT_Service sfnt;
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PSNames_Service psnames;
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PSHinter_Service pshinter;
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FT_Bool pure_cff = 1;
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FT_Bool sfnt_format = 0;
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sfnt = (SFNT_Service)FT_Get_Module_Interface(
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face->root.driver->root.library, "sfnt" );
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if ( !sfnt )
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goto Bad_Format;
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psnames = (PSNames_Service)FT_Get_Module_Interface(
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face->root.driver->root.library, "psnames" );
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pshinter = (PSHinter_Service)FT_Get_Module_Interface(
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face->root.driver->root.library, "pshinter" );
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/* create input stream from resource */
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if ( FT_STREAM_SEEK( 0 ) )
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goto Exit;
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/* check that we have a valid OpenType file */
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error = sfnt->init_face( stream, face, face_index, num_params, params );
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if ( !error )
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{
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if ( face->format_tag != 0x4F54544FL ) /* `OTTO'; OpenType/CFF font */
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{
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FT_TRACE2(( "[not a valid OpenType/CFF font]\n" ));
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goto Bad_Format;
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}
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/* if we are performing a simple font format check, exit immediately */
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if ( face_index < 0 )
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return CFF_Err_Ok;
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sfnt_format = 1;
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/* now, the font can be either an OpenType/CFF font, or an SVG CEF */
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/* font in the later case; it doesn't have a `head' table */
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error = face->goto_table( face, TTAG_head, stream, 0 );
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if ( !error )
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{
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pure_cff = 0;
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/* load font directory */
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error = sfnt->load_face( stream, face,
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face_index, num_params, params );
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if ( error )
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goto Exit;
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}
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else
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{
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/* load the `cmap' table by hand */
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error = sfnt->load_charmaps( face, stream );
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if ( error )
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goto Exit;
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/* XXX: we don't load the GPOS table, as OpenType Layout */
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/* support will be added later to a layout library on top of */
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/* FreeType 2 */
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}
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/* now, load the CFF part of the file */
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error = face->goto_table( face, TTAG_CFF, stream, 0 );
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if ( error )
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goto Exit;
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}
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else
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{
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/* rewind to start of file; we are going to load a pure-CFF font */
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if ( FT_STREAM_SEEK( 0 ) )
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goto Exit;
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error = CFF_Err_Ok;
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}
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/* now load and parse the CFF table in the file */
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{
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CFF_Font cff;
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FT_Memory memory = face->root.memory;
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FT_Face root;
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FT_UInt flags;
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if ( FT_NEW( cff ) )
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goto Exit;
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face->extra.data = cff;
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error = cff_font_load( stream, face_index, cff );
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if ( error )
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goto Exit;
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cff->pshinter = pshinter;
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cff->psnames = psnames;
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/* Complement the root flags with some interesting information. */
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/* Note that this is only necessary for pure CFF and CEF fonts. */
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root = &face->root;
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root->num_glyphs = cff->num_glyphs;
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if ( pure_cff )
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{
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CFF_FontRecDict dict = &cff->top_font.font_dict;
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/* we need the `PSNames' module for pure-CFF and CEF formats */
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if ( !psnames )
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{
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FT_ERROR(( "cff_face_init:" ));
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FT_ERROR(( " cannot open CFF & CEF fonts\n" ));
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FT_ERROR(( " " ));
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FT_ERROR(( " without the `PSNames' module\n" ));
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goto Bad_Format;
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}
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/* Set up num_faces. */
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root->num_faces = cff->num_faces;
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/* compute number of glyphs */
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if ( dict->cid_registry )
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root->num_glyphs = dict->cid_count;
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else
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root->num_glyphs = cff->charstrings_index.count;
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/* set global bbox, as well as EM size */
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root->bbox.xMin = dict->font_bbox.xMin >> 16;
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root->bbox.yMin = dict->font_bbox.yMin >> 16;
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root->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFFU ) >> 16;
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root->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFFU ) >> 16;
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root->ascender = (FT_Short)( root->bbox.yMax );
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root->descender = (FT_Short)( root->bbox.yMin );
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root->height = (FT_Short)(
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( ( root->ascender - root->descender ) * 12 ) / 10 );
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if ( dict->units_per_em )
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root->units_per_EM = dict->units_per_em;
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else
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root->units_per_EM = 1000;
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/* retrieve font family & style name */
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root->family_name = cff_index_get_name( &cff->name_index, face_index );
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if ( dict->cid_registry )
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root->style_name = cff_strcpy( memory, "Regular" ); /* XXXX */
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else
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root->style_name = cff_index_get_sid_string( &cff->string_index,
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dict->weight,
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psnames );
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/*******************************************************************/
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/* */
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/* Compute face flags. */
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/* */
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flags = FT_FACE_FLAG_SCALABLE | /* scalable outlines */
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FT_FACE_FLAG_HORIZONTAL; /* horizontal data */
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if ( sfnt_format )
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flags |= FT_FACE_FLAG_SFNT;
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/* fixed width font? */
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if ( dict->is_fixed_pitch )
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flags |= FT_FACE_FLAG_FIXED_WIDTH;
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/* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */
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#if 0
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/* kerning available? */
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if ( face->kern_pairs )
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flags |= FT_FACE_FLAG_KERNING;
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#endif
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#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
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flags |= FT_FACE_FLAG_GLYPH_NAMES;
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#endif
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root->face_flags = flags;
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/*******************************************************************/
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/* */
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/* Compute style flags. */
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/* */
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flags = 0;
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if ( dict->italic_angle )
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flags |= FT_STYLE_FLAG_ITALIC;
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/* XXX: may not be correct */
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if ( cff->top_font.private_dict.force_bold )
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flags |= FT_STYLE_FLAG_BOLD;
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root->style_flags = flags;
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}
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/*******************************************************************/
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/* */
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/* Compute char maps. */
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/* */
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/* try to synthetize a Unicode charmap if there is none available */
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/* already. If an OpenType font contains a Unicode "cmap", we */
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/* will use it, wathever be in the CFF part of the file.. */
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{
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FT_CharMapRec cmaprec;
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FT_CharMap cmap;
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FT_UInt nn;
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CFF_Encoding encoding = &cff->encoding;
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for ( nn = 0; nn < (FT_UInt) root->num_charmaps; nn++ )
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{
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cmap = root->charmaps[nn];
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/* Windows Unicode (3,1) ? */
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if ( cmap->platform_id == 3 && cmap->encoding_id == 1 )
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goto Skip_Unicode;
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/* Deprecated Unicode platform id ?? */
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if ( cmap->platform_id == 0 )
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goto Skip_Unicode; /* Standard Unicode (deprecated) */
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}
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/* we didn't find a Unicode charmap, synthetize one */
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#ifdef FT_CONFIG_OPTION_USE_CMAPS
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cmaprec.face = root;
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cmaprec.platform_id = 3;
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cmaprec.encoding_id = 1;
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cmaprec.encoding = ft_encoding_unicode;
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FT_CMap_New( &cff_cmap_unicode_class_rec, NULL, &cmaprec, NULL );
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Skip_Unicode:
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if ( encoding->count > 0 )
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{
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FT_CMap_Class clazz;
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cmaprec.face = root;
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cmaprec.platform_id = 7; /* Adobe platform id */
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switch( encoding->offset )
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{
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case 0:
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cmaprec.encoding_id = 0;
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cmaprec.encoding = ft_encoding_adobe_standard;
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clazz = &cff_cmap_encoding_class_rec;
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break;
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case 1:
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cmaprec.encoding_id = 1;
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cmaprec.encoding = ft_encoding_adobe_expert;
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clazz = &cff_cmap_encoding_class_rec;
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break;
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default:
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cmaprec.encoding_id = 3;
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cmaprec.encoding = ft_encoding_adobe_custom;
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clazz = &cff_cmap_encoding_class_rec;
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}
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FT_CMap_New( clazz, NULL, &cmaprec, NULL );
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#else /* !FT_CONFIG_OPTION_USE_CMAPS */
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/* unimplemented !! */
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#endif /* !FT_CONFIG_OPTION_USE_CMAPS */
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}
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}
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}
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Exit:
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return error;
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Bad_Format:
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error = CFF_Err_Unknown_File_Format;
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goto Exit;
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}
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FT_LOCAL_DEF( void )
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cff_face_done( CFF_Face face )
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{
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FT_Memory memory = face->root.memory;
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SFNT_Service sfnt = (SFNT_Service)face->sfnt;
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if ( sfnt )
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sfnt->done_face( face );
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{
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CFF_Font cff = (CFF_Font)face->extra.data;
|
|
|
|
|
|
if ( cff )
|
|
{
|
|
cff_font_done( cff );
|
|
FT_FREE( face->extra.data );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( FT_Error )
|
|
cff_driver_init( CFF_Driver driver )
|
|
{
|
|
FT_UNUSED( driver );
|
|
|
|
return CFF_Err_Ok;
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( void )
|
|
cff_driver_done( CFF_Driver driver )
|
|
{
|
|
FT_UNUSED( driver );
|
|
}
|
|
|
|
|
|
/* END */
|