1 /*
2 * Copyright © 2019 Ebrahim Byagowi
3 *
4 * This is part of HarfBuzz, a text shaping library.
5 *
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
11 *
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16 * DAMAGE.
17 *
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23 */
24
25 #include "hb.hh"
26
27 #ifdef HAVE_GDI
28
29 #include "hb-gdi.h"
30
31 static hb_blob_t *
_hb_gdi_reference_table(hb_face_t * face HB_UNUSED,hb_tag_t tag,void * user_data)32 _hb_gdi_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
33 {
34 char *buffer = nullptr;
35 DWORD length = 0;
36
37 HDC hdc = GetDC (nullptr);
38 if (unlikely (!SelectObject (hdc, (HFONT) user_data))) goto fail;
39
40 length = GetFontData (hdc, hb_uint32_swap (tag), 0, buffer, length);
41 if (unlikely (length == GDI_ERROR)) goto fail_with_releasedc;
42
43 buffer = (char *) malloc (length);
44 if (unlikely (!buffer)) goto fail_with_releasedc;
45 length = GetFontData (hdc, hb_uint32_swap (tag), 0, buffer, length);
46 if (unlikely (length == GDI_ERROR)) goto fail_with_releasedc_and_free;
47 ReleaseDC (nullptr, hdc);
48
49 return hb_blob_create ((const char *) buffer, length, HB_MEMORY_MODE_WRITABLE, buffer, free);
50
51 fail_with_releasedc_and_free:
52 free (buffer);
53 fail_with_releasedc:
54 ReleaseDC (nullptr, hdc);
55 fail:
56 return hb_blob_get_empty ();
57 }
58
59 /**
60 * hb_gdi_face_create:
61 * @hfont: a HFONT object.
62 *
63 * Return value: #hb_face_t object corresponding to the given input
64 *
65 * Since: 2.6.0
66 **/
67 hb_face_t *
hb_gdi_face_create(HFONT hfont)68 hb_gdi_face_create (HFONT hfont)
69 {
70 return hb_face_create_for_tables (_hb_gdi_reference_table, (void *) hfont, nullptr);
71 }
72
73 #endif
74