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kc3-lang/kc3/libkc3_window/cairo/cairo_font.c

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  • libkc3_window/cairo/cairo_font.c 
  • /* kc3
 * Copyright 2022,2023,2024 kmx.io <contact@kmx.io>
 *
 * Permission is hereby granted to use this software granted the above
 * copyright notice and this permission paragraph are included in all
 * copies and substantial portions of this software.
 *
 * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
 * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
 * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
 * THIS SOFTWARE.
 */
#include <libkc3/kc3.h>
#include "cairo_font.h"

static FT_Library *g_cairo_font_ft = NULL;

static FT_Library * cairo_font_ft (void);

void c3_window_cairo_font_clean (void)
{
  if (g_cairo_font_ft) {
    FT_Done_FreeType(*g_cairo_font_ft);
    free(g_cairo_font_ft);
  }
}

void cairo_font_clean (s_cairo_font *font)
{
  assert(font);
  cairo_font_face_destroy(font->cairo_font_face);
  FT_Done_Face(font->ft_face);
  str_clean(&font->path);
  str_clean(&font->real_path);
}

static FT_Library * cairo_font_ft (void)
{
  if (! g_cairo_font_ft) {
    g_cairo_font_ft = malloc(sizeof(FT_Library));
    if (! g_cairo_font_ft) {
      err_puts("cairo_font_ft: failed to allocate memory");
      return NULL;
    }
    if (FT_Init_FreeType(g_cairo_font_ft)) {
      err_puts("cairo_font_ft: error initializing FreeType");
      free(g_cairo_font_ft);
      g_cairo_font_ft = NULL;
      return NULL;
    }
  }
  return g_cairo_font_ft;
}

s_cairo_font * cairo_font_init (s_cairo_font *font, const char *path)
{
  FT_Library *ft;
  assert(font);
  assert(path);
  if (! (ft = cairo_font_ft()))
    return NULL;
  str_init_copy_1(&font->path, path);
  if (! file_search(&font->path, sym_1("r"), &font->real_path)) {
    err_write_1("cairo_font_init: file not found: ");
    err_puts(path);
    str_clean(&font->path);
    return NULL;
  }
  if (FT_New_Face(*ft, font->real_path.ptr.pchar, 0, &font->ft_face)) {
    err_write_1("cairo_font_init: error loading font: ");
    err_puts(font->real_path.ptr.pchar);
    str_clean(&font->path);
    str_clean(&font->real_path);
    return NULL;
  }
  font->cairo_font_face = cairo_ft_font_face_create_for_ft_face
    (font->ft_face, 0);
  return font;
}

void cairo_set_font (cairo_t *cr, const s_cairo_font *font)
{
  cairo_set_font_face(cr, font->cairo_font_face);
}