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

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• Hash : a960be9e
  Author :
  Date : 2022-03-18T17:41:01
  

  [woff2] Support overlap flag for simple glyphs. In the woff2 spec it has been proposed to allow the OVERLAP_SIMPLE flag to be retained through the woff2 format [0]. [0] https://www.w3.org/TR/WOFF2/#glyf_table_format * src/sfnt/sfwoff2.h (GLYF_OVERLAP_SIMPLE): add glyf flag. * src/sfnt/sfwoff2.c (reconstruct_glyf): parse optionFlags and overlapSimpleBitmap[]. (store_points): set OVERLAP_SIMPLE on first point's flag if the overlap bit is set.

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• src/sfnt/sfwoff2.h

• /****************************************************************************
   *
   * sfwoff2.h
   *
   *   WOFFF2 format management (specification).
   *
   * Copyright (C) 2019-2022 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 <freetype/internal/sfnt.h>
  #include <freetype/internal/ftobjs.h>
  
  
  FT_BEGIN_HEADER
  
  #ifdef FT_CONFIG_OPTION_USE_BROTLI
  
    /* 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 maximum 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
  #define GLYF_OVERLAP_SIMPLE  1 << 6
  
    /* 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 );
  
  #endif /* FT_CONFIG_OPTION_USE_BROTLI */
  
  FT_END_HEADER
  
  #endif /* SFWOFF2_H_ */
  
  
  /* END */
  

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