121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/*
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* Copyright © 2022 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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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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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HELPER_CAIRO_FT_HH
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#define HELPER_CAIRO_FT_HH
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#include "font-options.hh"
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#include <cairo-ft.h>
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#include <hb-ft.h>
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#include FT_MULTIPLE_MASTERS_H
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static FT_Library ft_library;
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#ifdef HAVE_ATEXIT
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static inline
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void free_ft_library ()
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{
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FT_Done_FreeType (ft_library);
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}
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#endif
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static inline cairo_font_face_t *
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helper_cairo_create_ft_font_face (const font_options_t *font_opts)
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{
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cairo_font_face_t *cairo_face;
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/* We cannot use the FT_Face from hb_font_t, as doing so will confuse hb_font_t because
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* cairo will reset the face size. As such, create new face...
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* TODO Perhaps add API to hb-ft to encapsulate this code. */
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FT_Face ft_face = nullptr;//hb_ft_font_get_face (font);
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if (!ft_face)
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{
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if (!ft_library)
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{
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FT_Init_FreeType (&ft_library);
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#ifdef HAVE_ATEXIT
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atexit (free_ft_library);
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#endif
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}
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unsigned int blob_length;
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const char *blob_data = hb_blob_get_data (font_opts->blob, &blob_length);
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if (FT_New_Memory_Face (ft_library,
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(const FT_Byte *) blob_data,
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blob_length,
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font_opts->face_index,
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&ft_face))
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fail (false, "FT_New_Memory_Face fail");
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}
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if (!ft_face)
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{
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/* This allows us to get some boxes at least... */
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cairo_face = cairo_toy_font_face_create ("@cairo:sans",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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}
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else
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{
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#ifdef HAVE_FT_SET_VAR_BLEND_COORDINATES
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unsigned int num_coords;
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const int *coords = hb_font_get_var_coords_normalized (font_opts->font, &num_coords);
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if (num_coords)
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{
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FT_Fixed *ft_coords = (FT_Fixed *) calloc (num_coords, sizeof (FT_Fixed));
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if (ft_coords)
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{
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for (unsigned int i = 0; i < num_coords; i++)
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ft_coords[i] = coords[i] << 2;
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FT_Set_Var_Blend_Coordinates (ft_face, num_coords, ft_coords);
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free (ft_coords);
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}
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}
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#endif
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cairo_face = cairo_ft_font_face_create_for_ft_face (ft_face, font_opts->ft_load_flags);
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}
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return cairo_face;
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}
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static inline bool
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helper_cairo_ft_scaled_font_has_color (cairo_scaled_font_t *scaled_font)
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{
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bool ret = false;
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#ifdef FT_HAS_COLOR
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FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font);
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if (ft_face)
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{
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if (FT_HAS_COLOR (ft_face))
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ret = true;
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cairo_ft_scaled_font_unlock_face (scaled_font);
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}
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#endif
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return ret;
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}
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#endif
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