1 /***************************************************************************/ 2 /* */ 3 /* ttsubpix.h */ 4 /* */ 5 /* TrueType Subpixel Hinting. */ 6 /* */ 7 /* Copyright 2010-2013 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_CONFIG_OPTION_SUBPIXEL_HINTING 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 0x0000001 54 #define SPH_TWEAK_ALWAYS_DO_DELTAP 0x0000002 55 #define SPH_TWEAK_ALWAYS_SKIP_DELTAP 0x0000004 56 #define SPH_TWEAK_COURIER_NEW_2_HACK 0x0000008 57 #define SPH_TWEAK_DEEMBOLDEN 0x0000010 58 #define SPH_TWEAK_DO_SHPIX 0x0000020 59 #define SPH_TWEAK_EMBOLDEN 0x0000040 60 #define SPH_TWEAK_MIAP_HACK 0x0000080 61 #define SPH_TWEAK_NORMAL_ROUND 0x0000100 62 #define SPH_TWEAK_NO_ALIGNRP_AFTER_IUP 0x0000200 63 #define SPH_TWEAK_NO_CALL_AFTER_IUP 0x0000400 64 #define SPH_TWEAK_NO_DELTAP_AFTER_IUP 0x0000800 65 #define SPH_TWEAK_PIXEL_HINTING 0x0001000 66 #define SPH_TWEAK_RASTERIZER_35 0x0002000 67 #define SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES 0x0004000 68 #define SPH_TWEAK_SKIP_IUP 0x0008000 69 #define SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES 0x0010000 70 #define SPH_TWEAK_SKIP_OFFPIXEL_Y_MOVES 0x0020000 71 #define SPH_TWEAK_TIMES_NEW_ROMAN_HACK 0x0040000 72 #define SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES_DELTAP 0x0080000 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_CONFIG_OPTION_SUBPIXEL_HINTING */ 104 105 106 FT_END_HEADER 107 108 #endif /* __TTSUBPIX_H__ */ 109 110 /* END */ 111
