projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| cabec872 RR |
1 | /***************************************************************************/ |
| 2 | /* */ | |
| 3 | /* ahoptim.h */ | |
| 4 | /* */ | |
| 5 | /* FreeType auto hinting outline optimization (declaration). */ | |
| 6 | /* */ | |
| 7 | /* Copyright 2000 Catharon Productions Inc. */ | |
| 8 | /* Author: David Turner */ | |
| 9 | /* */ | |
| 10 | /* This file is part of the Catharon Typography Project and shall only */ | |
| 11 | /* be used, modified, and distributed under the terms of the Catharon */ | |
| 12 | /* Open Source License that should come with this file under the name */ | |
| 13 | /* `CatharonLicense.txt'. By continuing to use, modify, or distribute */ | |
| 14 | /* this file you indicate that you have read the license and */ | |
| 15 | /* understand and accept it fully. */ | |
| 16 | /* */ | |
| 17 | /* Note that this license is compatible with the FreeType license. */ | |
| 18 | /* */ | |
| 19 | /***************************************************************************/ | |
| 20 | ||
| 21 | ||
| 22 | #ifndef AHOPTIM_H | |
| 23 | #define AHOPTIM_H | |
| 24 | ||
| 25 | ||
| 26 | #ifdef FT_FLAT_COMPILE | |
| 27 | ||
| 28 | #include "ahtypes.h" | |
| 29 | ||
| 30 | #else | |
| 31 | ||
| 32 | #include <autohint/ahtypes.h> | |
| 33 | ||
| 34 | #endif | |
| 35 | ||
| 36 | ||
| 37 | /* the maximal number of stem configurations to record */ | |
| 38 | /* during optimization */ | |
| 39 | #define AH_MAX_CONFIGS 8 | |
| 40 | ||
| 41 | ||
| 42 | typedef struct AH_Stem_ | |
| 43 | { | |
| 44 | FT_Pos pos; /* current position */ | |
| 45 | FT_Pos velocity; /* current velocity */ | |
| 46 | FT_Pos force; /* sum of current forces */ | |
| 47 | FT_Pos width; /* normalized width */ | |
| 48 | ||
| 49 | FT_Pos min_pos; /* minimum grid position */ | |
| 50 | FT_Pos max_pos; /* maximum grid position */ | |
| 51 | ||
| 52 | AH_Edge* edge1; /* left/bottom edge */ | |
| 53 | AH_Edge* edge2; /* right/top edge */ | |
| 54 | ||
| 55 | FT_Pos opos; /* original position */ | |
| 56 | FT_Pos owidth; /* original width */ | |
| 57 | ||
| 58 | FT_Pos min_coord; /* minimum coordinate */ | |
| 59 | FT_Pos max_coord; /* maximum coordinate */ | |
| 60 | ||
| 61 | } AH_Stem; | |
| 62 | ||
| 63 | ||
| 64 | /* A spring between two stems */ | |
| 65 | typedef struct AH_Spring_ | |
| 66 | { | |
| 67 | AH_Stem* stem1; | |
| 68 | AH_Stem* stem2; | |
| 69 | FT_Pos owidth; /* original width */ | |
| 70 | FT_Pos tension; /* current tension */ | |
| 71 | ||
| 72 | } AH_Spring; | |
| 73 | ||
| 74 | ||
| 75 | /* A configuration records the position of each stem at a given time */ | |
| 76 | /* as well as the associated distortion */ | |
| 77 | typedef struct AH_Configuration_ | |
| 78 | { | |
| 79 | FT_Pos* positions; | |
| 80 | FT_Long distortion; | |
| 81 | ||
| 82 | } AH_Configuration; | |
| 83 | ||
| 84 | ||
| 85 | typedef struct AH_Optimizer_ | |
| 86 | { | |
| 87 | FT_Memory memory; | |
| 88 | AH_Outline* outline; | |
| 89 | ||
| 90 | FT_Int num_hstems; | |
| 91 | AH_Stem* horz_stems; | |
| 92 | ||
| 93 | FT_Int num_vstems; | |
| 94 | AH_Stem* vert_stems; | |
| 95 | ||
| 96 | FT_Int num_hsprings; | |
| 97 | FT_Int num_vsprings; | |
| 98 | AH_Spring* horz_springs; | |
| 99 | AH_Spring* vert_springs; | |
| 100 | ||
| 101 | FT_Int num_configs; | |
| 102 | AH_Configuration configs[AH_MAX_CONFIGS]; | |
| 103 | FT_Pos* positions; | |
| 104 | ||
| 105 | /* during each pass, use these instead */ | |
| 106 | FT_Int num_stems; | |
| 107 | AH_Stem* stems; | |
| 108 | ||
| 109 | FT_Int num_springs; | |
| 110 | AH_Spring* springs; | |
| 111 | FT_Bool vertical; | |
| 112 | ||
| 113 | FT_Fixed tension_scale; | |
| 114 | FT_Pos tension_threshold; | |
| 115 | ||
| 116 | } AH_Optimizer; | |
| 117 | ||
| 118 | ||
| 119 | /* loads the outline into the optimizer */ | |
| 120 | int AH_Optimizer_Init( AH_Optimizer* optimizer, | |
| 121 | AH_Outline* outline, | |
| 122 | FT_Memory memory ); | |
| 123 | ||
| 124 | ||
| 125 | /* compute optimal outline */ | |
| 126 | void AH_Optimizer_Compute( AH_Optimizer* optimizer ); | |
| 127 | ||
| 128 | ||
| 129 | /* release the optimization data */ | |
| 130 | void AH_Optimizer_Done( AH_Optimizer* optimizer ); | |
| 131 | ||
| 132 | ||
| 133 | #endif /* AHOPTIM_H */ | |
| 134 | ||
| 135 | ||
| 136 | /* END */ |