xref: /external/pdfium/third_party/freetype/src/type1/t1driver.c

/***************************************************************************/
/*                                                                         */
/*  t1driver.c                                                             */
/*                                                                         */
/*    Type 1 driver interface (body).                                      */
/*                                                                         */
/*  Copyright 1996-2015 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 <ft2build.h>
#include "t1driver.h"
#include "t1gload.h"
#include "t1load.h"

#include "t1errors.h"

#ifndef T1_CONFIG_OPTION_NO_AFM
#include "t1afm.h"
#endif

#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H

#include FT_SERVICE_MULTIPLE_MASTERS_H
#include FT_SERVICE_GLYPH_DICT_H
#include FT_SERVICE_FONT_FORMAT_H
#include FT_SERVICE_POSTSCRIPT_NAME_H
#include FT_SERVICE_POSTSCRIPT_CMAPS_H
#include FT_SERVICE_POSTSCRIPT_INFO_H
#include FT_SERVICE_KERNING_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  trace_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,
                     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,
    (FT_GlyphDict_NameIndexFunc)t1_get_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
  };


  /*
   *  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,
    (FT_Set_MM_Design_Func) T1_Set_MM_Design,
    (FT_Set_MM_Blend_Func)  T1_Set_MM_Blend,
    (FT_Get_MM_Var_Func)    T1_Get_MM_Var,
    (FT_Set_Var_Design_Func)T1_Set_Var_Design
  };
#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:
      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:
      if ( idx < (FT_UInt)type1->num_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:
      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:
      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:
      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:
      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:
      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_GetFontExtraFunc)  t1_ps_get_font_extra,
    (PS_HasGlyphNamesFunc) t1_ps_has_glyph_names,
    (PS_GetFontPrivateFunc)t1_ps_get_font_private,
    (PS_GetFontValueFunc)  t1_ps_get_font_value,
  };


#ifndef T1_CONFIG_OPTION_NO_AFM
  static const FT_Service_KerningRec  t1_service_kerning =
  {
    T1_Get_Track_Kerning,
  };
#endif


  /*
   *  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 },

#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 ( FT_DriverRec ),

      "type1",
      0x10000L,
      0x20000L,

      0,   /* format interface */

      T1_Driver_Init,
      T1_Driver_Done,
      Get_Interface,
    },

    sizeof ( T1_FaceRec ),
    sizeof ( T1_SizeRec ),
    sizeof ( T1_GlyphSlotRec ),

    T1_Face_Init,
    T1_Face_Done,
    T1_Size_Init,
    T1_Size_Done,
    T1_GlyphSlot_Init,
    T1_GlyphSlot_Done,

    T1_Load_Glyph,

#ifdef T1_CONFIG_OPTION_NO_AFM
    0,                     /* FT_Face_GetKerningFunc */
    0,                     /* FT_Face_AttachFunc     */
#else
    Get_Kerning,
    T1_Read_Metrics,
#endif
    T1_Get_Advances,
    T1_Size_Request,
    0                      /* FT_Size_SelectFunc     */
  };


/* END */