1 /***************************************************************************/
2 /* */
3 /* ftgasp.c */
4 /* */
5 /* Access of TrueType's `gasp' table (body). */
6 /* */
7 /* Copyright 2007-2018 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
9 /* */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
15 /* */
16 /***************************************************************************/
17
18
19 #include <ft2build.h>
20 #include FT_GASP_H
21 #include FT_INTERNAL_TRUETYPE_TYPES_H
22
23
24 FT_EXPORT_DEF( FT_Int )
25 FT_Get_Gasp( FT_Face face,
26 FT_UInt ppem )
27 {
28 FT_Int result = FT_GASP_NO_TABLE;
29
30
31 if ( face && FT_IS_SFNT( face ) )
32 {
33 TT_Face ttface = (TT_Face)face;
34
35
36 if ( ttface->gasp.numRanges > 0 )
37 {
38 TT_GaspRange range = ttface->gasp.gaspRanges;
39 TT_GaspRange range_end = range + ttface->gasp.numRanges;
40
41
42 while ( ppem > range->maxPPEM )
43 {
44 range++;
45 if ( range >= range_end )
46 goto Exit;
47 }
48
49 result = range->gaspFlag;
50
51 /* ensure that we don't have spurious bits */
52 if ( ttface->gasp.version == 0 )
53 result &= 3;
54 }
55 }
56 Exit:
57 return result;
58 }
59
60
61 /* END */