| /* |
| * Copyright © 2022 Google, Inc. |
| * |
| * This is part of HarfBuzz, a text shaping library. |
| * |
| * Permission is hereby granted, without written agreement and without |
| * license or royalty fees, to use, copy, modify, and distribute this |
| * software and its documentation for any purpose, provided that the |
| * above copyright notice and the following two paragraphs appear in |
| * all copies of this software. |
| * |
| * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| * |
| * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| * |
| * Google Author(s): Behdad Esfahbod |
| */ |
| |
| #ifndef HELPER_CAIRO_FT_HH |
| #define HELPER_CAIRO_FT_HH |
| |
| #include "font-options.hh" |
| |
| #include <cairo-ft.h> |
| #include <hb-ft.h> |
| #include FT_MULTIPLE_MASTERS_H |
| |
| static FT_Library ft_library; |
| |
| #ifdef HAVE_ATEXIT |
| static inline |
| void free_ft_library () |
| { |
| FT_Done_FreeType (ft_library); |
| } |
| #endif |
| |
| static inline cairo_font_face_t * |
| helper_cairo_create_ft_font_face (const font_options_t *font_opts) |
| { |
| cairo_font_face_t *cairo_face; |
| /* We cannot use the FT_Face from hb_font_t, as doing so will confuse hb_font_t because |
| * cairo will reset the face size. As such, create new face... |
| * TODO Perhaps add API to hb-ft to encapsulate this code. */ |
| FT_Face ft_face = nullptr;//hb_ft_font_get_face (font); |
| if (!ft_face) |
| { |
| if (!ft_library) |
| { |
| FT_Init_FreeType (&ft_library); |
| #ifdef HAVE_ATEXIT |
| atexit (free_ft_library); |
| #endif |
| } |
| |
| unsigned int blob_length; |
| const char *blob_data = hb_blob_get_data (font_opts->blob, &blob_length); |
| |
| if (FT_New_Memory_Face (ft_library, |
| (const FT_Byte *) blob_data, |
| blob_length, |
| font_opts->face_index, |
| &ft_face)) |
| fail (false, "FT_New_Memory_Face fail"); |
| } |
| if (!ft_face) |
| { |
| /* This allows us to get some boxes at least... */ |
| cairo_face = cairo_toy_font_face_create ("@cairo:sans", |
| CAIRO_FONT_SLANT_NORMAL, |
| CAIRO_FONT_WEIGHT_NORMAL); |
| } |
| else |
| { |
| #if !defined(HB_NO_VAR) && defined(HAVE_FT_SET_VAR_BLEND_COORDINATES) |
| unsigned int num_coords; |
| const int *coords = hb_font_get_var_coords_normalized (font_opts->font, &num_coords); |
| if (num_coords) |
| { |
| FT_Fixed *ft_coords = (FT_Fixed *) calloc (num_coords, sizeof (FT_Fixed)); |
| if (ft_coords) |
| { |
| for (unsigned int i = 0; i < num_coords; i++) |
| ft_coords[i] = coords[i] << 2; |
| FT_Set_Var_Blend_Coordinates (ft_face, num_coords, ft_coords); |
| free (ft_coords); |
| } |
| } |
| #endif |
| |
| cairo_face = cairo_ft_font_face_create_for_ft_face (ft_face, font_opts->ft_load_flags); |
| } |
| return cairo_face; |
| } |
| |
| static inline bool |
| helper_cairo_ft_scaled_font_has_color (cairo_scaled_font_t *scaled_font) |
| { |
| bool ret = false; |
| #ifdef FT_HAS_COLOR |
| FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font); |
| if (ft_face) |
| { |
| if (FT_HAS_COLOR (ft_face)) |
| ret = true; |
| cairo_ft_scaled_font_unlock_face (scaled_font); |
| } |
| #endif |
| return ret; |
| } |
| |
| #endif |