kc3-lang/harfbuzz/src/hb-gdi.cc

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• Hash : 2337f0d0
  Author :
  Date : 2021-07-08T10:58:50
  

  Internally use hb_malloc/.../hb_free instead of malloc/.../free
  
  Redefining those stock names as macros was conflicting with gcc 10
  headers.
  
  Fixes https://github.com/harfbuzz/harfbuzz/issues/3044
  

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• src/hb-gdi.cc

• /*
   * Copyright © 2019  Ebrahim Byagowi
   *
   *  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.
   */
  
  #include "hb.hh"
  
  #ifdef HAVE_GDI
  
  #include "hb-gdi.h"
  
  
  /**
   * SECTION:hb-gdi
   * @title: hb-gdi
   * @short_description: GDI integration
   * @include: hb-gdi.h
   *
   * Functions for using HarfBuzz with GDI fonts.
   **/
  
  static hb_blob_t *
  _hb_gdi_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
  {
    char *buffer = nullptr;
    DWORD length = 0;
  
    HDC hdc = GetDC (nullptr);
    if (unlikely (!SelectObject (hdc, (HFONT) user_data))) goto fail;
  
    length = GetFontData (hdc, hb_uint32_swap (tag), 0, buffer, length);
    if (unlikely (length == GDI_ERROR)) goto fail_with_releasedc;
  
    buffer = (char *) hb_malloc (length);
    if (unlikely (!buffer)) goto fail_with_releasedc;
    length = GetFontData (hdc, hb_uint32_swap (tag), 0, buffer, length);
    if (unlikely (length == GDI_ERROR)) goto fail_with_releasedc_and_free;
    ReleaseDC (nullptr, hdc);
  
    return hb_blob_create ((const char *) buffer, length, HB_MEMORY_MODE_WRITABLE, buffer, hb_free);
  
  fail_with_releasedc_and_free:
    hb_free (buffer);
  fail_with_releasedc:
    ReleaseDC (nullptr, hdc);
  fail:
    return hb_blob_get_empty ();
  }
  
  /**
   * hb_gdi_face_create:
   * @hfont: a HFONT object.
   *
   * Constructs a new face object from the specified GDI HFONT.
   *
   * Return value: #hb_face_t object corresponding to the given input
   *
   * Since: 2.6.0
   **/
  hb_face_t *
  hb_gdi_face_create (HFONT hfont)
  {
    return hb_face_create_for_tables (_hb_gdi_reference_table, (void *) hfont, nullptr);
  }
  
  #endif
  

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