kc3-lang/freetype/src/type1/t1objs.c

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• Hash : 7f615aef
  Author :
  Date : 2000-03-13T11:49:20
  

  renamed all outlines functions to the FT_Outline_<action> syntax..

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• src/type1/t1objs.c

• /*******************************************************************
   *
   *  t1objs.c                                                     1.0
   *
   *    Type1 Objects manager.        
   *
   *  Copyright 1996-1998 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 <ftdebug.h>
  #include <ftstream.h>
  
  #include <t1gload.h>
  #include <t1load.h>
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
  #include <t1hinter.h>
  #endif
  
  #include <psnames.h>
  
  /* Required by tracing mode */
  #undef   FT_COMPONENT
  #define  FT_COMPONENT  trace_t1objs
  
  /*******************************************************************
   *                                                                 *
   *                         SIZE  FUNCTIONS                         *
   *                                                                 *
   *                                                                 *
   *******************************************************************/
  
  /*******************************************************************
   *
   * <Function>  T1_Done_Size
   *
   * <Description>
   *    The TrueDoc instance object destructor. Used to discard
   *    a given instance object..
   *
   * <Input>
   *    instance   :: handle to the target instance object
   *
   * <Return>
   *    TrueDoc error code. 0 means success
   *
   ******************************************************************/
  
    LOCAL_FUNC
    void  T1_Done_Size( T1_Size  size )
    {
      if (size)
      {
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
        T1_Done_Size_Hinter( size );
  #endif
        size->valid = 0;
      }
    }
  
  
  /*******************************************************************
   *
   *  <Function> T1_Init_Size
   *
   *  <Description>
   *     The instance object constructor
   *
   *  <Input>
   *     instance  : handle to new instance object
   *     face      : pointer to parent face object
   *
   *  <Return>
   *     TrueDoc error code. 0 means success.
   *
   ******************************************************************/
  
    LOCAL_DEF
    T1_Error  T1_Init_Size( T1_Size  size )
    {
      T1_Error    error;
        
      size->valid = 0;
      
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
      error = T1_New_Size_Hinter( size );
      return error;
  #else
      (void)error;
      return T1_Err_Ok;
  #endif
    }
  
  
  /*******************************************************************
   *
   *  <Function> T1_Reset_Size
   *
   *  <Description>
   *     Resets an instance to a new pointsize/transform.
   *     This function is in charge of resetting the blue zones,
   *     As well as the stem snap tables for a given size..
   *
   *  <Input>
   *     instance   the instance object to destroy
   *
   *  <Output>
   *     Error code.
   *
   ******************************************************************/
   
    LOCAL_FUNC
    T1_Error  T1_Reset_Size( T1_Size  size )
    {
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
      return T1_Reset_Size_Hinter( size );
  #else
      (void)size;
      return 0;
  #endif
    }
  
  
  /*******************************************************************
   *                                                                 *
   *                         FACE  FUNCTIONS                         *
   *                                                                 *
   *                                                                 *
   *******************************************************************/
  
  /*******************************************************************
   *
   *  <Function> T1_Done_Face
   *
   *  <Description>
   *     The face object destructor.
   *
   *  <Input>
   *     face  :: typeless pointer to the face object to destroy
   *
   *  <Return>
   *     Error code.                       
   *
   ******************************************************************/
  
    LOCAL_FUNC
    void  T1_Done_Face( T1_Face  face )
    {
      FT_Memory  memory;
  
      if (face)
      {
        memory = face->root.memory;
        /* XXXX : TO DO */
      }
    }
  
  /*******************************************************************
   *
   *  <Function>  T1_Init_Face
   *
   *  <Description>
   *     The face object constructor.
   *
   *  <Input>
   *     face  ::  face record to build
   *     Input ::  input stream where to load font data
   *
   *  <Return>
   *     Error code.
   *
   ******************************************************************/
  
    LOCAL_FUNC
    T1_Error  T1_Init_Face( FT_Stream  stream,
                            FT_Int     face_index,
                            T1_Face    face )
    {
      T1_Tokenizer        tokenizer;
      T1_Error            error;
      PSNames_Interface*  psnames;
  
      (void)face_index;
      (void)face;
  
      face->root.num_faces = 1;
  
      psnames = (PSNames_Interface*)face->psnames;
      if (!psnames)
      {
        /* look-up the PSNames driver */
        FT_Driver  psnames_driver;
        
        psnames_driver = FT_Get_Driver( face->root.driver->library, "psnames" );
        if (psnames_driver)
          face->psnames = (PSNames_Interface*)
                              (psnames_driver->interface.format_interface);
      }
  
      /* open the tokenizer, this will also check the font format */
      error = New_Tokenizer( stream, &tokenizer );
      if (error) goto Fail;
  
      /* if we just wanted to check the format, leave successfully now */
      if (face_index < 0)
        goto Leave;
  
      /* check the face index */
      if ( face_index != 0 )
      {
        FT_ERROR(( "T1.Init_Face : invalid face index\n" ));
        error = T1_Err_Invalid_Argument;
        goto Leave;
      }
  
      /* Now, load the font program into the face object */
      {
        T1_Parser  parser;
  
        Init_T1_Parser( &parser, face, tokenizer );
        error = Parse_T1_FontProgram( &parser );
        if (error) goto Leave;
  
        /* Init the face object fields */
        /* Now set up root face fields */
        {
          FT_Face  root  = (FT_Face)&face->root;
          T1_Font* type1 = &face->type1;
          
          root->num_glyphs   = type1->num_glyphs;
          root->num_charmaps = 1;
    
          root->face_index = face_index;
          root->face_flags = FT_FACE_FLAG_SCALABLE;
          
          root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
                                
          if ( type1->is_fixed_pitch )
            root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
  
          /* XXX : TO DO - add kerning with .afm support */
  
          /* get style name - be careful, some broken fonts only */
          /* have a /FontName dictionary entry .. !!             */
          root->family_name = type1->family_name;
          if (root->family_name)
          {
            char*  full   = type1->full_name;
            char*  family = root->family_name;
            
            while ( *family && *full == *family )
            {
              family++;
              full++;
            }
            
            root->style_name = ( *full == ' ' ? full+1 : "Regular" );
          }
          else
          {
            /* do we have a /FontName ?? */
            if (type1->font_name)
            {
              root->family_name = type1->font_name;
              root->style_name  = "Regular";
            }
          }
    
          /* no embedded bitmap support */
          root->num_fixed_sizes = 0;
          root->available_sizes = 0;
    
          root->bbox         = type1->font_bbox;
          root->units_per_EM = 1000;
          root->ascender     =  (T1_Short)type1->font_bbox.yMax;
          root->descender    = -(T1_Short)type1->font_bbox.yMin;
          root->height       = ((root->ascender + root->descender)*12)/10;
    
          /* now compute the maximum advance width */
  
          root->max_advance_width = type1->standard_width;
  
          /* compute max advance width for proportional fonts */
          if (!type1->is_fixed_pitch)
          {
            T1_Int  max_advance;
  
            error = T1_Compute_Max_Advance( face, &max_advance );
  
            /* in case of error, keep the standard width */
            if (!error)
              root->max_advance_width = max_advance;
            else
              error = 0;   /* clear error */
          }
  
          root->max_advance_height = root->height;
          
          root->underline_position  = type1->underline_position;
          root->underline_thickness = type1->underline_thickness;
    
          root->max_points   = 0;
          root->max_contours = 0;
        }
      }
  
    Leave:
      Done_Tokenizer( tokenizer );
  
    Fail:
      return error;
    }
  
  
  /*******************************************************************
   *
   *  Function    :  Glyph_Destroy
   *
   *  Description :  The glyph object destructor.
   *
   *  Input  :  _glyph  typeless pointer to the glyph record to destroy
   *
   *  Output :  Error code.                       
   *
   ******************************************************************/
  
    LOCAL_FUNC
    void  T1_Done_GlyphSlot( T1_GlyphSlot  glyph )
    {
      FT_Memory  memory  = glyph->root.face->memory;
      FT_Library library = glyph->root.face->driver->library;
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
      T1_Done_Glyph_Hinter( glyph );
  #endif
  	/* the bitmaps are created on demand */
  	FREE( glyph->root.bitmap.buffer );
      FT_Outline_Done( library, &glyph->root.outline );
      return;
    }
  
  
  /*******************************************************************
   *
   *  Function    :  Glyph_Create
   *
   *  Description :  The glyph object constructor.
   *
   *  Input  :  glyph   glyph record to build.
   *            face    the glyph's parent face.              
   *
   *  Output :  Error code.
   *
   ******************************************************************/
  
    LOCAL_FUNC
    T1_Error  T1_Init_GlyphSlot( T1_GlyphSlot  glyph )
    {
      FT_Library  library = glyph->root.face->driver->library;
      T1_Error    error;
  
      glyph->max_points         = 0;
      glyph->max_contours       = 0;
      glyph->root.bitmap.buffer = 0;
  
      error = FT_Outline_New( library, 0, 0, &glyph->root.outline );
      if (error) return error;
  
  #ifndef T1_CONFIG_OPTION_DISABLE_HINTER
      error = T1_New_Glyph_Hinter( glyph );
      if (error)
        FT_Outline_Done( library, &glyph->root.outline );
  #endif
  
      return error;
    }
  
  
  /*******************************************************************
   *
   *  <Function>  T1_Init_Driver
   *
   *  <Description>
   *     Initialise a given Type 1 driver object
   *
   *  <Input>
   *     driver ::  handle to target driver object
   *
   *  <Return>
   *     Error code.
   *
   ******************************************************************/
  
    LOCAL_FUNC
    T1_Error  T1_Init_Driver( T1_Driver  driver )
    {
      (void)driver;
      return T1_Err_Ok;
    }
  
  
  
  /*******************************************************************
   *
   *  <Function> T1_Done_Driver
   *
   *  <Description>
   *     finalise a given Type 1 driver
   *
   *  <Input>
   *     driver  :: handle to target Type 1 driver
   *
   ******************************************************************/
  
    LOCAL_DEF
    void  T1_Done_Driver( T1_Driver  driver )
    {
      (void)driver;
    }
  
  
  /* END */
  

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