[autofit] Don't depend on 'hb-ft'.
The circular dependency is still there, but at least we no longer depend on the HarfBuzz API that is only present if HarfBuzz has been built with FreeType support, making the bootstrapping a bit easier. * src/autofit/ft-hb.c, src/autofit/ft-hb.h: New files, providing `_hb_ft_font_create`, which is more or less a verbatim copy of the corresponding HarfBuzz code from file `hb-ft.cc`. * src/autofit/afglobal.c (af_face_globals_new): Use it. * src/autofit/afshaper.h: Don't include `hb-ft.h` but `ft-hb.h`. * src/autofit/autofit.c: Include `ft-hb.c`. * LICENSE.TXT: Updated.
This commit is contained in:
Matthias Clasen
Werner Lemberg
parent
262b47ac5a
commit
ebe7e9128c
@ -35,6 +35,10 @@ in earlier FreeType versions.
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The gzip module uses the zlib license (see `src/gzip/zlib.h`) which
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too is compatible to the above two licenses.
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The files `src/autofit/ft-hb.c` and `src/autofit/ft-hb.h` contain code
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taken almost verbatim from the HarfBuzz file `hb-ft.cc`, which uses
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the 'Old MIT' license, compatible to the above two licenses.
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The MD5 checksum support (only used for debugging in development
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builds) is in the public domain.
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@ -356,7 +356,7 @@
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globals->scale_down_factor = 0;
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#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
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globals->hb_font = hb_ft_font_create( face, NULL );
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globals->hb_font = _hb_ft_font_create( face, NULL );
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globals->hb_buf = hb_buffer_create();
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#endif
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@ -27,7 +27,7 @@
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#include <hb.h>
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#include <hb-ot.h>
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#include <hb-ft.h>
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#include "ft-hb.h"
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#endif
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@ -18,6 +18,7 @@
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#define FT_MAKE_OPTION_SINGLE_OBJECT
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#include "ft-hb.c"
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#include "afblue.c"
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#include "afcjk.c"
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#include "afdummy.c"
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106
src/autofit/ft-hb.c
Normal file
106
src/autofit/ft-hb.c
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@ -0,0 +1,106 @@
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/*
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* Copyright © 2009, 2023 Red Hat, Inc.
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* Copyright © 2015 Google, Inc.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod, Matthias Clasen
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* Google Author(s): Behdad Esfahbod
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*/
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#include <freetype/freetype.h>
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#include <freetype/tttables.h>
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#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
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#include "ft-hb.h"
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/* The following three functions are a more or less verbatim
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* copy of corresponding HarfBuzz code from hb-ft.cc
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*/
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static hb_blob_t *
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_hb_ft_reference_table (hb_face_t *face, hb_tag_t tag, void *user_data)
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{
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FT_Face ft_face = (FT_Face) user_data;
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FT_Byte *buffer;
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FT_ULong length = 0;
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FT_Error error;
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/* Note: FreeType like HarfBuzz uses the NONE tag for fetching the entire blob */
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error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length);
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if (error)
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return NULL;
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buffer = (FT_Byte *) malloc (length);
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if (!buffer)
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return NULL;
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error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
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if (error)
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{
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free (buffer);
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return NULL;
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}
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return hb_blob_create ((const char *) buffer, length,
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HB_MEMORY_MODE_WRITABLE,
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buffer, free);
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}
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static hb_face_t *
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_hb_ft_face_create (FT_Face ft_face,
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hb_destroy_func_t destroy)
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{
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hb_face_t *face;
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if (!ft_face->stream->read) {
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hb_blob_t *blob;
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blob = hb_blob_create ((const char *) ft_face->stream->base,
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(unsigned int) ft_face->stream->size,
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HB_MEMORY_MODE_READONLY,
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ft_face, destroy);
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face = hb_face_create (blob, ft_face->face_index);
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hb_blob_destroy (blob);
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} else {
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face = hb_face_create_for_tables (_hb_ft_reference_table, ft_face, destroy);
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}
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hb_face_set_index (face, ft_face->face_index);
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hb_face_set_upem (face, ft_face->units_per_EM);
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return face;
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}
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hb_font_t *
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_hb_ft_font_create (FT_Face ft_face,
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hb_destroy_func_t destroy)
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{
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hb_font_t *font;
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hb_face_t *face;
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face = _hb_ft_face_create (ft_face, destroy);
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font = hb_font_create (face);
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hb_face_destroy (face);
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return font;
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}
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#endif
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35
src/autofit/ft-hb.h
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35
src/autofit/ft-hb.h
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@ -0,0 +1,35 @@
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/*
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* Copyright © 2009, 2023 Red Hat, Inc.
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* Copyright © 2015 Google, Inc.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod, Matthias Clasen
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef FT_HB_H
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#define FT_HB_H
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#include <hb.h>
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hb_font_t * _hb_ft_font_create (FT_Face ft_face,
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hb_destroy_func_t destroy);
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#endif
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