The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* ftsizes.h */ |
| 4 | /* */ |
| 5 | /* FreeType size objects management (specification). */ |
| 6 | /* */ |
Victoria Lease | ec0bab5 | 2013-12-12 09:12:18 -0800 | [diff] [blame^] | 7 | /* Copyright 1996-2001, 2003, 2004, 2006, 2009, 2013 by */ |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 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 | /*************************************************************************/ |
| 20 | /* */ |
| 21 | /* Typical application would normally not need to use these functions. */ |
| 22 | /* However, they have been placed in a public API for the rare cases */ |
| 23 | /* where they are needed. */ |
| 24 | /* */ |
| 25 | /*************************************************************************/ |
| 26 | |
| 27 | |
| 28 | #ifndef __FTSIZES_H__ |
| 29 | #define __FTSIZES_H__ |
| 30 | |
| 31 | |
| 32 | #include <ft2build.h> |
| 33 | #include FT_FREETYPE_H |
| 34 | |
| 35 | #ifdef FREETYPE_H |
| 36 | #error "freetype.h of FreeType 1 has been loaded!" |
| 37 | #error "Please fix the directory search order for header files" |
| 38 | #error "so that freetype.h of FreeType 2 is found first." |
| 39 | #endif |
| 40 | |
| 41 | |
| 42 | FT_BEGIN_HEADER |
| 43 | |
| 44 | |
| 45 | /*************************************************************************/ |
| 46 | /* */ |
| 47 | /* <Section> */ |
| 48 | /* sizes_management */ |
| 49 | /* */ |
| 50 | /* <Title> */ |
| 51 | /* Size Management */ |
| 52 | /* */ |
| 53 | /* <Abstract> */ |
| 54 | /* Managing multiple sizes per face. */ |
| 55 | /* */ |
| 56 | /* <Description> */ |
| 57 | /* When creating a new face object (e.g., with @FT_New_Face), an */ |
| 58 | /* @FT_Size object is automatically created and used to store all */ |
| 59 | /* pixel-size dependent information, available in the `face->size' */ |
| 60 | /* field. */ |
| 61 | /* */ |
| 62 | /* It is however possible to create more sizes for a given face, */ |
| 63 | /* mostly in order to manage several character pixel sizes of the */ |
| 64 | /* same font family and style. See @FT_New_Size and @FT_Done_Size. */ |
| 65 | /* */ |
| 66 | /* Note that @FT_Set_Pixel_Sizes and @FT_Set_Char_Size only */ |
| 67 | /* modify the contents of the current `active' size; you thus need */ |
| 68 | /* to use @FT_Activate_Size to change it. */ |
| 69 | /* */ |
| 70 | /* 99% of applications won't need the functions provided here, */ |
| 71 | /* especially if they use the caching sub-system, so be cautious */ |
| 72 | /* when using these. */ |
| 73 | /* */ |
| 74 | /*************************************************************************/ |
| 75 | |
| 76 | |
| 77 | /*************************************************************************/ |
| 78 | /* */ |
| 79 | /* <Function> */ |
| 80 | /* FT_New_Size */ |
| 81 | /* */ |
| 82 | /* <Description> */ |
| 83 | /* Create a new size object from a given face object. */ |
| 84 | /* */ |
| 85 | /* <Input> */ |
| 86 | /* face :: A handle to a parent face object. */ |
| 87 | /* */ |
| 88 | /* <Output> */ |
| 89 | /* asize :: A handle to a new size object. */ |
| 90 | /* */ |
| 91 | /* <Return> */ |
The Android Open Source Project | 0a9d06e | 2009-03-18 22:20:25 -0700 | [diff] [blame] | 92 | /* FreeType error code. 0~means success. */ |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 93 | /* */ |
| 94 | /* <Note> */ |
| 95 | /* You need to call @FT_Activate_Size in order to select the new size */ |
| 96 | /* for upcoming calls to @FT_Set_Pixel_Sizes, @FT_Set_Char_Size, */ |
| 97 | /* @FT_Load_Glyph, @FT_Load_Char, etc. */ |
| 98 | /* */ |
| 99 | FT_EXPORT( FT_Error ) |
| 100 | FT_New_Size( FT_Face face, |
| 101 | FT_Size* size ); |
| 102 | |
| 103 | |
| 104 | /*************************************************************************/ |
| 105 | /* */ |
| 106 | /* <Function> */ |
| 107 | /* FT_Done_Size */ |
| 108 | /* */ |
| 109 | /* <Description> */ |
| 110 | /* Discard a given size object. Note that @FT_Done_Face */ |
| 111 | /* automatically discards all size objects allocated with */ |
| 112 | /* @FT_New_Size. */ |
| 113 | /* */ |
| 114 | /* <Input> */ |
| 115 | /* size :: A handle to a target size object. */ |
| 116 | /* */ |
| 117 | /* <Return> */ |
The Android Open Source Project | 0a9d06e | 2009-03-18 22:20:25 -0700 | [diff] [blame] | 118 | /* FreeType error code. 0~means success. */ |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 119 | /* */ |
| 120 | FT_EXPORT( FT_Error ) |
| 121 | FT_Done_Size( FT_Size size ); |
| 122 | |
| 123 | |
| 124 | /*************************************************************************/ |
| 125 | /* */ |
| 126 | /* <Function> */ |
| 127 | /* FT_Activate_Size */ |
| 128 | /* */ |
| 129 | /* <Description> */ |
| 130 | /* Even though it is possible to create several size objects for a */ |
| 131 | /* given face (see @FT_New_Size for details), functions like */ |
Victoria Lease | ec0bab5 | 2013-12-12 09:12:18 -0800 | [diff] [blame^] | 132 | /* @FT_Load_Glyph or @FT_Load_Char only use the one that has been */ |
The Android Open Source Project | 0a9d06e | 2009-03-18 22:20:25 -0700 | [diff] [blame] | 133 | /* activated last to determine the `current character pixel size'. */ |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 134 | /* */ |
| 135 | /* This function can be used to `activate' a previously created size */ |
| 136 | /* object. */ |
| 137 | /* */ |
| 138 | /* <Input> */ |
| 139 | /* size :: A handle to a target size object. */ |
| 140 | /* */ |
| 141 | /* <Return> */ |
The Android Open Source Project | 0a9d06e | 2009-03-18 22:20:25 -0700 | [diff] [blame] | 142 | /* FreeType error code. 0~means success. */ |
The Android Open Source Project | 049d6fe | 2009-03-03 19:29:31 -0800 | [diff] [blame] | 143 | /* */ |
| 144 | /* <Note> */ |
| 145 | /* If `face' is the size's parent face object, this function changes */ |
| 146 | /* the value of `face->size' to the input size handle. */ |
| 147 | /* */ |
| 148 | FT_EXPORT( FT_Error ) |
| 149 | FT_Activate_Size( FT_Size size ); |
| 150 | |
| 151 | /* */ |
| 152 | |
| 153 | |
| 154 | FT_END_HEADER |
| 155 | |
| 156 | #endif /* __FTSIZES_H__ */ |
| 157 | |
| 158 | |
| 159 | /* END */ |