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| Direktori : /usr/include/freetype2/freetype/ |
| Current File : //usr/include/freetype2/freetype/ftsizes.h |
/***************************************************************************/
/* */
/* ftsizes.h */
/* */
/* FreeType size objects management (specification). */
/* */
/* Copyright 1996-2017 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. */
/* */
/***************************************************************************/
/*************************************************************************/
/* */
/* Typical application would normally not need to use these functions. */
/* However, they have been placed in a public API for the rare cases */
/* where they are needed. */
/* */
/*************************************************************************/
#ifndef FTSIZES_H_
#define FTSIZES_H_
#include <ft2build.h>
#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
/*************************************************************************/
/* */
/* <Section> */
/* sizes_management */
/* */
/* <Title> */
/* Size Management */
/* */
/* <Abstract> */
/* Managing multiple sizes per face. */
/* */
/* <Description> */
/* When creating a new face object (e.g., with @FT_New_Face), an */
/* @FT_Size object is automatically created and used to store all */
/* pixel-size dependent information, available in the `face->size' */
/* field. */
/* */
/* It is however possible to create more sizes for a given face, */
/* mostly in order to manage several character pixel sizes of the */
/* same font family and style. See @FT_New_Size and @FT_Done_Size. */
/* */
/* Note that @FT_Set_Pixel_Sizes and @FT_Set_Char_Size only */
/* modify the contents of the current `active' size; you thus need */
/* to use @FT_Activate_Size to change it. */
/* */
/* 99% of applications won't need the functions provided here, */
/* especially if they use the caching sub-system, so be cautious */
/* when using these. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* FT_New_Size */
/* */
/* <Description> */
/* Create a new size object from a given face object. */
/* */
/* <Input> */
/* face :: A handle to a parent face object. */
/* */
/* <Output> */
/* asize :: A handle to a new size object. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* You need to call @FT_Activate_Size in order to select the new size */
/* for upcoming calls to @FT_Set_Pixel_Sizes, @FT_Set_Char_Size, */
/* @FT_Load_Glyph, @FT_Load_Char, etc. */
/* */
FT_EXPORT( FT_Error )
FT_New_Size( FT_Face face,
FT_Size* size );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Done_Size */
/* */
/* <Description> */
/* Discard a given size object. Note that @FT_Done_Face */
/* automatically discards all size objects allocated with */
/* @FT_New_Size. */
/* */
/* <Input> */
/* size :: A handle to a target size object. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
FT_EXPORT( FT_Error )
FT_Done_Size( FT_Size size );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Activate_Size */
/* */
/* <Description> */
/* Even though it is possible to create several size objects for a */
/* given face (see @FT_New_Size for details), functions like */
/* @FT_Load_Glyph or @FT_Load_Char only use the one that has been */
/* activated last to determine the `current character pixel size'. */
/* */
/* This function can be used to `activate' a previously created size */
/* object. */
/* */
/* <Input> */
/* size :: A handle to a target size object. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* If `face' is the size's parent face object, this function changes */
/* the value of `face->size' to the input size handle. */
/* */
FT_EXPORT( FT_Error )
FT_Activate_Size( FT_Size size );
/* */
FT_END_HEADER
#endif /* FTSIZES_H_ */
/* END */