121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/*
|
|
* 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
|