1 /**************************************************************************** 2 * 3 * ttsubpix.h 4 * 5 * TrueType Subpixel Hinting. 6 * 7 * Copyright (C) 2010-2020 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 #ifndef TTSUBPIX_H_ 20 #define TTSUBPIX_H_ 21 22 #include <ft2build.h> 23 #include "ttobjs.h" 24 #include "ttinterp.h" 25 26 27 FT_BEGIN_HEADER 28 29 30 #ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY 31 32 /************************************************************************** 33 * 34 * ID flags to identify special functions at FDEF and runtime. 35 * 36 */ 37 #define SPH_FDEF_INLINE_DELTA_1 0x0000001 38 #define SPH_FDEF_INLINE_DELTA_2 0x0000002 39 #define SPH_FDEF_DIAGONAL_STROKE 0x0000004 40 #define SPH_FDEF_VACUFORM_ROUND_1 0x0000008 41 #define SPH_FDEF_TTFAUTOHINT_1 0x0000010 42 #define SPH_FDEF_SPACING_1 0x0000020 43 #define SPH_FDEF_SPACING_2 0x0000040 44 #define SPH_FDEF_TYPEMAN_STROKES 0x0000080 45 #define SPH_FDEF_TYPEMAN_DIAGENDCTRL 0x0000100 46 47 48 /************************************************************************** 49 * 50 * Tweak flags that are set for each glyph by the below rules. 51 * 52 */ 53 #define SPH_TWEAK_ALLOW_X_DMOVE 0x0000001UL 54 #define SPH_TWEAK_ALWAYS_DO_DELTAP 0x0000002UL 55 #define SPH_TWEAK_ALWAYS_SKIP_DELTAP 0x0000004UL 56 #define SPH_TWEAK_COURIER_NEW_2_HACK 0x0000008UL 57 #define SPH_TWEAK_DEEMBOLDEN 0x0000010UL 58 #define SPH_TWEAK_DO_SHPIX 0x0000020UL 59 #define SPH_TWEAK_EMBOLDEN 0x0000040UL 60 #define SPH_TWEAK_MIAP_HACK 0x0000080UL 61 #define SPH_TWEAK_NORMAL_ROUND 0x0000100UL 62 #define SPH_TWEAK_NO_ALIGNRP_AFTER_IUP 0x0000200UL 63 #define SPH_TWEAK_NO_CALL_AFTER_IUP 0x0000400UL 64 #define SPH_TWEAK_NO_DELTAP_AFTER_IUP 0x0000800UL 65 #define SPH_TWEAK_PIXEL_HINTING 0x0001000UL 66 #define SPH_TWEAK_RASTERIZER_35 0x0002000UL 67 #define SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES 0x0004000UL 68 #define SPH_TWEAK_SKIP_IUP 0x0008000UL 69 #define SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES 0x0010000UL 70 #define SPH_TWEAK_SKIP_OFFPIXEL_Y_MOVES 0x0020000UL 71 #define SPH_TWEAK_TIMES_NEW_ROMAN_HACK 0x0040000UL 72 #define SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES_DELTAP 0x0080000UL 73 74 75 FT_LOCAL( FT_Bool ) 76 sph_test_tweak( TT_Face face, 77 const FT_String* family, 78 FT_UInt ppem, 79 const FT_String* style, 80 FT_UInt glyph_index, 81 const SPH_TweakRule* rule, 82 FT_UInt num_rules ); 83 84 FT_LOCAL( FT_UInt ) 85 sph_test_tweak_x_scaling( TT_Face face, 86 const FT_String* family, 87 FT_UInt ppem, 88 const FT_String* style, 89 FT_UInt glyph_index ); 90 91 FT_LOCAL( void ) 92 sph_set_tweaks( TT_Loader loader, 93 FT_UInt glyph_index ); 94 95 96 /* These macros are defined absent a method for setting them */ 97 #define SPH_OPTION_BITMAP_WIDTHS FALSE 98 #define SPH_OPTION_SET_SUBPIXEL TRUE 99 #define SPH_OPTION_SET_GRAYSCALE FALSE 100 #define SPH_OPTION_SET_COMPATIBLE_WIDTHS FALSE 101 #define SPH_OPTION_SET_RASTERIZER_VERSION 38 102 103 #endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */ 104 105 106 FT_END_HEADER 107 108 #endif /* TTSUBPIX_H_ */ 109 110 111 /* END */ 112