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159 lines
9.3 KiB
159 lines
9.3 KiB
/***************************************************************************/ |
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/* */ |
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/* ftsizes.h */ |
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/* */ |
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/* FreeType size objects management (specification). */ |
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/* */ |
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/* Copyright 1996-2001, 2003, 2004, 2006 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used, */ |
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/* modified, and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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/* */ |
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/***************************************************************************/ |
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/*************************************************************************/ |
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/* */ |
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/* Typical application would normally not need to use these functions. */ |
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/* However, they have been placed in a public API for the rare cases */ |
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/* where they are needed. */ |
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/* */ |
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/*************************************************************************/ |
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#ifndef __FTSIZES_H__ |
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#define __FTSIZES_H__ |
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#include <ft2build.h> |
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#include FT_FREETYPE_H |
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#ifdef FREETYPE_H |
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#error "freetype.h of FreeType 1 has been loaded!" |
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#error "Please fix the directory search order for header files" |
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#error "so that freetype.h of FreeType 2 is found first." |
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#endif |
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FT_BEGIN_HEADER |
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/*************************************************************************/ |
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/* */ |
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/* <Section> */ |
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/* sizes_management */ |
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/* */ |
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/* <Title> */ |
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/* Size Management */ |
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/* */ |
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/* <Abstract> */ |
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/* Managing multiple sizes per face. */ |
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/* */ |
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/* <Description> */ |
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/* When creating a new face object (e.g., with @FT_New_Face), an */ |
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/* @FT_Size object is automatically created and used to store all */ |
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/* pixel-size dependent information, available in the `face->size' */ |
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/* field. */ |
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/* */ |
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/* It is however possible to create more sizes for a given face, */ |
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/* mostly in order to manage several character pixel sizes of the */ |
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/* same font family and style. See @FT_New_Size and @FT_Done_Size. */ |
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/* */ |
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/* Note that @FT_Set_Pixel_Sizes and @FT_Set_Char_Size only */ |
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/* modify the contents of the current `active' size; you thus need */ |
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/* to use @FT_Activate_Size to change it. */ |
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/* */ |
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/* 99% of applications won't need the functions provided here, */ |
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/* especially if they use the caching sub-system, so be cautious */ |
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/* when using these. */ |
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/* */ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/* */ |
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/* <Function> */ |
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/* FT_New_Size */ |
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/* */ |
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/* <Description> */ |
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/* Create a new size object from a given face object. */ |
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/* */ |
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/* <Input> */ |
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/* face :: A handle to a parent face object. */ |
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/* */ |
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/* <Output> */ |
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/* asize :: A handle to a new size object. */ |
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/* */ |
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/* <Return> */ |
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/* FreeType error code. 0 means success. */ |
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/* */ |
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/* <Note> */ |
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/* You need to call @FT_Activate_Size in order to select the new size */ |
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/* for upcoming calls to @FT_Set_Pixel_Sizes, @FT_Set_Char_Size, */ |
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/* @FT_Load_Glyph, @FT_Load_Char, etc. */ |
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/* */ |
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FT_EXPORT( FT_Error ) |
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FT_New_Size( FT_Face face, |
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FT_Size* size ); |
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/*************************************************************************/ |
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/* */ |
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/* <Function> */ |
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/* FT_Done_Size */ |
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/* */ |
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/* <Description> */ |
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/* Discard a given size object. Note that @FT_Done_Face */ |
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/* automatically discards all size objects allocated with */ |
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/* @FT_New_Size. */ |
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/* */ |
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/* <Input> */ |
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/* size :: A handle to a target size object. */ |
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/* */ |
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/* <Return> */ |
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/* FreeType error code. 0 means success. */ |
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/* */ |
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FT_EXPORT( FT_Error ) |
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FT_Done_Size( FT_Size size ); |
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/*************************************************************************/ |
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/* */ |
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/* <Function> */ |
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/* FT_Activate_Size */ |
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/* */ |
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/* <Description> */ |
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/* Even though it is possible to create several size objects for a */ |
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/* given face (see @FT_New_Size for details), functions like */ |
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/* @FT_Load_Glyph or @FT_Load_Char only use the last-created one to */ |
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/* determine the `current character pixel size'. */ |
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/* */ |
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/* This function can be used to `activate' a previously created size */ |
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/* object. */ |
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/* */ |
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/* <Input> */ |
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/* size :: A handle to a target size object. */ |
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/* */ |
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/* <Return> */ |
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/* FreeType error code. 0 means success. */ |
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/* */ |
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/* <Note> */ |
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/* If `face' is the size's parent face object, this function changes */ |
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/* the value of `face->size' to the input size handle. */ |
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/* */ |
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FT_EXPORT( FT_Error ) |
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FT_Activate_Size( FT_Size size ); |
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/* */ |
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FT_END_HEADER |
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#endif /* __FTSIZES_H__ */ |
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/* END */
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