kc3-lang/freetype/src/sfnt/sfwoff2.h

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• Hash : 5367e0ca
  Author :
  Date : 2019-08-05T01:53:00
  

  [sfnt] Support `face->num_faces' for WOFF2 fonts.
  
  Set correct value of `face->num_faces' for WOFF2 fonts.  This is
  being handled separately because we only load the tables for the
  requested font face in `woff2_open_font' and create a single-face
  sfnt stream.
  
  The full discussion is at:
  
    https://lists.gnu.org/archive/html/freetype-devel/2019-08/msg00000.html
  
  * src/sfnt/sfobjs.c (sfnt_open_font): Add parameter
  `woff2_num_faces'.
  (sfnt_init_face): Introduce variable `woff2_num_faces', and change
  `face->root.num_faces' if `woff2_num_faces' is set.
  
  * src/sfnt/sfwoff2.c (woff2_open_font): Validate requested face
  index and handle negative face indices.
  
  * src/sfnt/sfwoff2.h (woff2_open_font): Add parameter `num_faces' to
  declaration.
  

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• src/sfnt/sfwoff2.h

• /****************************************************************************
   *
   * sfwoff2.h
   *
   *   WOFFF2 format management (specification).
   *
   * Copyright (C) 2019 by
   * Nikhil Ramakrishnan, 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.
   *
   */
  
  
  #ifndef SFWOFF2_H_
  #define SFWOFF2_H_
  
  
  #include <ft2build.h>
  #include FT_INTERNAL_SFNT_H
  #include FT_INTERNAL_OBJECTS_H
  
  
  FT_BEGIN_HEADER
  
  
    /* Leave the first byte open to store flag_byte. */
  #define WOFF2_FLAGS_TRANSFORM   1 << 8
  
  #define WOFF2_SFNT_HEADER_SIZE  12
  #define WOFF2_SFNT_ENTRY_SIZE   16
  
    /* Suggested max size for output. */
  #define WOFF2_DEFAULT_MAX_SIZE  30 * 1024 * 1024
  
    /* 98% of Google Fonts have no glyph above 5k bytes. */
  #define WOFF2_DEFAULT_GLYPH_BUF  5120
  
    /* Composite glyph flags                                     */
    /* See CompositeGlyph.java in `sfntly' for full definitions  */
  #define FLAG_ARG_1_AND_2_ARE_WORDS     1 << 0
  #define FLAG_WE_HAVE_A_SCALE           1 << 3
  #define FLAG_MORE_COMPONENTS           1 << 5
  #define FLAG_WE_HAVE_AN_X_AND_Y_SCALE  1 << 6
  #define FLAG_WE_HAVE_A_TWO_BY_TWO      1 << 7
  #define FLAG_WE_HAVE_INSTRUCTIONS      1 << 8
  
    /* Simple glyph flags */
  #define GLYF_ON_CURVE        1 << 0
  #define GLYF_X_SHORT         1 << 1
  #define GLYF_Y_SHORT         1 << 2
  #define GLYF_REPEAT          1 << 3
  #define GLYF_THIS_X_IS_SAME  1 << 4
  #define GLYF_THIS_Y_IS_SAME  1 << 5
  
    /* Other constants */
  #define CONTOUR_OFFSET_END_POINT  10
  
  
    FT_LOCAL( FT_Error )
    woff2_open_font( FT_Stream  stream,
                     TT_Face    face,
                     FT_Int*    face_index,
                     FT_Long*   num_faces );
  
  
  FT_END_HEADER
  
  #endif /* SFWOFF2_H_ */
  
  
  /* END */
  

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