405 lines
10 KiB
C
405 lines
10 KiB
C
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/*******************************************************************
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*
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* t1objs.c 1.0
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*
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* Type1 Objects manager.
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*
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* Copyright 1996-1998 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 <ftdebug.h>
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#include <ftstream.h>
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#include <t1gload.h>
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#include <t1load.h>
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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#include <t1hinter.h>
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#endif
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/* Required by tracing mode */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_t1objs
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/*******************************************************************
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* *
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* SIZE FUNCTIONS *
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* *
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* *
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*******************************************************************/
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/*******************************************************************
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*
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* <Function> T1_Done_Size
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*
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* <Description>
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* The TrueDoc instance object destructor. Used to discard
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* a given instance object..
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*
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* <Input>
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* instance :: handle to the target instance object
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*
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* <Return>
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* TrueDoc error code. 0 means success
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*
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******************************************************************/
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LOCAL_FUNC
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void T1_Done_Size( T1_Size size )
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{
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if (size)
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{
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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T1_Done_Size_Hinter( size );
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#endif
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size->valid = 0;
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}
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}
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/*******************************************************************
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*
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* <Function> T1_Init_Size
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*
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* <Description>
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* The instance object constructor
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*
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* <Input>
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* instance : handle to new instance object
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* face : pointer to parent face object
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*
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* <Return>
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* TrueDoc error code. 0 means success.
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*
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******************************************************************/
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LOCAL_DEF
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T1_Error T1_Init_Size( T1_Size size )
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{
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T1_Error error;
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size->valid = 0;
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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error = T1_New_Size_Hinter( size );
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return error;
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#else
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(void)error;
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return T1_Err_Ok;
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#endif
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}
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/*******************************************************************
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*
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* <Function> T1_Reset_Size
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*
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* <Description>
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* Resets an instance to a new pointsize/transform.
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* This function is in charge of resetting the blue zones,
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* As well as the stem snap tables for a given size..
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*
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* <Input>
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* instance the instance object to destroy
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*
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* <Output>
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* Error code.
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*
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******************************************************************/
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LOCAL_FUNC
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T1_Error T1_Reset_Size( T1_Size size )
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{
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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return T1_Reset_Size_Hinter( size );
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#else
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(void)size;
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return 0;
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#endif
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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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*******************************************************************/
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/*******************************************************************
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*
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* <Function> T1_Done_Face
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*
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* <Description>
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* The face object destructor.
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*
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* <Input>
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* face :: typeless pointer to the face object to destroy
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*
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* <Return>
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* Error code.
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*
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******************************************************************/
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LOCAL_FUNC
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void T1_Done_Face( T1_Face face )
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{
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FT_Memory memory;
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if (face)
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{
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memory = face->root.memory;
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/* XXXX : TO DO */
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}
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}
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/*******************************************************************
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*
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* <Function> T1_Init_Face
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*
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* <Description>
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* The face object constructor.
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*
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* <Input>
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* face :: face record to build
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* Input :: input stream where to load font data
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*
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* <Return>
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* Error code.
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*
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******************************************************************/
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LOCAL_FUNC
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T1_Error T1_Init_Face( FT_Stream stream,
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FT_Int face_index,
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T1_Face face )
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{
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T1_Error error;
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(void)face_index;
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(void)face;
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face->root.num_faces = 1;
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/* open the tokenizer, this will also check the font format */
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error = T1_Open_Face( face );
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if (error) goto Exit;
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/* if we just wanted to check the format, leave successfully now */
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if (face_index < 0)
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goto Exit;
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/* check the face index */
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if ( face_index != 0 )
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{
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FT_ERROR(( "T1.Init_Face : invalid face index\n" ));
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error = T1_Err_Invalid_Argument;
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goto Exit;
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}
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/* Now, load the font program into the face object */
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{
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/* Init the face object fields */
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/* Now set up root face fields */
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{
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FT_Face root = (FT_Face)&face->root;
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root->num_glyphs = face->type1.num_glyphs;
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root->num_charmaps = 1;
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root->face_index = face_index;
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root->face_flags = FT_FACE_FLAG_SCALABLE;
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root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
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if ( face->type1.is_fixed_pitch )
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root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
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/* XXX : TO DO - add kerning with .afm support */
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/* get style name - be careful, some broken fonts only */
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/* have a /FontName dictionary entry .. !! */
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root->family_name = face->type1.family_name;
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if (root->family_name)
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{
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char* full = face->type1.full_name;
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char* family = root->family_name;
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while ( *family && *full == *family )
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{
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family++;
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full++;
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}
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root->style_name = ( *full == ' ' ? full+1 : "Regular" );
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}
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else
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{
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/* do we have a /FontName ?? */
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if (face->type1.font_name)
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{
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root->family_name = face->type1.font_name;
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root->style_name = "Regular";
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}
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}
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/* no embedded bitmap support */
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root->num_fixed_sizes = 0;
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root->available_sizes = 0;
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root->bbox = face->type1.font_bbox;
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root->units_per_EM = 1000;
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root->ascender = (T1_Short)face->type1.font_bbox.yMax;
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root->descender = -(T1_Short)face->type1.font_bbox.yMin;
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root->height = ((root->ascender + root->descender)*12)/10;
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/* now compute the maximum advance width */
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root->max_advance_width = face->type1.standard_width;
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/* compute max advance width for proportional fonts */
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if (!face->type1.is_fixed_pitch)
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{
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T1_Int max_advance;
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error = T1_Compute_Max_Advance( face, &max_advance );
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/* in case of error, keep the standard width */
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if (!error)
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root->max_advance_width = max_advance;
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else
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error = 0; /* clear error */
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}
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root->max_advance_height = root->height;
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root->underline_position = face->type1.underline_position;
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root->underline_thickness = face->type1.underline_thickness;
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root->max_points = 0;
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root->max_contours = 0;
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}
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}
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Exit:
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return error;
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}
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/*******************************************************************
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*
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* Function : Glyph_Destroy
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*
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* Description : The glyph object destructor.
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*
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* Input : _glyph typeless pointer to the glyph record to destroy
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*
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* Output : Error code.
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*
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******************************************************************/
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LOCAL_FUNC
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void T1_Done_GlyphSlot( T1_GlyphSlot glyph )
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{
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FT_Memory memory = glyph->root.face->memory;
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FT_Library library = glyph->root.face->driver->library;
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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T1_Done_Glyph_Hinter( glyph );
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#endif
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/* the bitmaps are created on demand */
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FREE( glyph->root.bitmap.buffer );
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FT_Done_Outline( library, &glyph->root.outline );
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return;
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}
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/*******************************************************************
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*
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* Function : Glyph_Create
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*
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* Description : The glyph object constructor.
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*
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* Input : glyph glyph record to build.
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* face the glyph's parent face.
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*
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* Output : Error code.
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*
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******************************************************************/
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LOCAL_FUNC
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T1_Error T1_Init_GlyphSlot( T1_GlyphSlot glyph )
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{
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FT_Library library = glyph->root.face->driver->library;
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T1_Error error;
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glyph->max_points = 0;
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glyph->max_contours = 0;
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glyph->root.bitmap.buffer = 0;
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error = FT_New_Outline( library, 0, 0, &glyph->root.outline );
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if (error) return error;
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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error = T1_New_Glyph_Hinter( glyph );
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if (error)
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FT_Done_Outline( library, &glyph->root.outline );
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#endif
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return error;
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}
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/*******************************************************************
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*
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* <Function> T1_Init_Driver
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*
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* <Description>
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* Initialise a given Type 1 driver object
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*
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* <Input>
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* driver :: handle to target driver object
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*
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* <Return>
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* Error code.
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*
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******************************************************************/
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LOCAL_FUNC
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T1_Error T1_Init_Driver( T1_Driver driver )
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{
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(void)driver;
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return T1_Err_Ok;
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}
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/*******************************************************************
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*
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* <Function> T1_Done_Driver
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*
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* <Description>
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* finalise a given Type 1 driver
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*
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* <Input>
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* driver :: handle to target Type 1 driver
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*
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******************************************************************/
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LOCAL_DEF
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void T1_Done_Driver( T1_Driver driver )
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{
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(void)driver;
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}
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/* END */
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