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 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 ``` ``````/***************************************************************************/ /* */ /* ftbbox.h */ /* */ /* FreeType exact bbox computation (specification). */ /* */ /* Copyright 1996-2015 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ /* modified, and distributed under the terms of the FreeType project */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* this file you indicate that you have read the license and */ /* understand and accept it fully. */ /* */ /***************************************************************************/ /*************************************************************************/ /* */ /* This component has a _single_ role: to compute exact outline bounding */ /* boxes. */ /* */ /* It is separated from the rest of the engine for various technical */ /* reasons. It may well be integrated in `ftoutln' later. */ /* */ /*************************************************************************/ #ifndef __FTBBOX_H__ #define __FTBBOX_H__ #include #include FT_FREETYPE_H #ifdef FREETYPE_H #error "freetype.h of FreeType 1 has been loaded!" #error "Please fix the directory search order for header files" #error "so that freetype.h of FreeType 2 is found first." #endif FT_BEGIN_HEADER /*************************************************************************/ /* */ /*
*/ /* outline_processing */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* */ /* FT_Outline_Get_BBox */ /* */ /* */ /* Compute the exact bounding box of an outline. This is slower */ /* than computing the control box. However, it uses an advanced */ /* algorithm that returns _very_ quickly when the two boxes */ /* coincide. Otherwise, the outline Bézier arcs are traversed to */ /* extract their extrema. */ /* */ /* */ /* outline :: A pointer to the source outline. */ /* */ /* */ /* abbox :: The outline's exact bounding box. */ /* */ /* */ /* FreeType error code. 0~means success. */ /* */ /* */ /* If the font is tricky and the glyph has been loaded with */ /* @FT_LOAD_NO_SCALE, the resulting BBox is meaningless. To get */ /* reasonable values for the BBox it is necessary to load the glyph */ /* at a large ppem value (so that the hinting instructions can */ /* properly shift and scale the subglyphs), then extracting the BBox, */ /* which can be eventually converted back to font units. */ /* */ FT_EXPORT( FT_Error ) FT_Outline_Get_BBox( FT_Outline* outline, FT_BBox *abbox ); /* */ FT_END_HEADER #endif /* __FTBBOX_H__ */ /* END */ /* Local Variables: */ /* coding: utf-8 */ /* End: */ ``````