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| Current File : //usr/include/freetype2/freetype/ftbitmap.h |
/***************************************************************************/
/* */
/* ftbitmap.h */
/* */
/* FreeType utility functions for bitmaps (specification). */
/* */
/* Copyright 2004-2018 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. */
/* */
/***************************************************************************/
#ifndef FTBITMAP_H_
#define FTBITMAP_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> */
/* bitmap_handling */
/* */
/* <Title> */
/* Bitmap Handling */
/* */
/* <Abstract> */
/* Handling FT_Bitmap objects. */
/* */
/* <Description> */
/* This section contains functions for handling @FT_Bitmap objects. */
/* Note that none of the functions changes the bitmap's `flow' (as */
/* indicated by the sign of the `pitch' field in `FT_Bitmap'). */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* FT_Bitmap_Init */
/* */
/* <Description> */
/* Initialize a pointer to an @FT_Bitmap structure. */
/* */
/* <InOut> */
/* abitmap :: A pointer to the bitmap structure. */
/* */
/* <Note> */
/* A deprecated name for the same function is `FT_Bitmap_New'. */
/* */
FT_EXPORT( void )
FT_Bitmap_Init( FT_Bitmap *abitmap );
/* deprecated */
FT_EXPORT( void )
FT_Bitmap_New( FT_Bitmap *abitmap );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Bitmap_Copy */
/* */
/* <Description> */
/* Copy a bitmap into another one. */
/* */
/* <Input> */
/* library :: A handle to a library object. */
/* */
/* source :: A handle to the source bitmap. */
/* */
/* <Output> */
/* target :: A handle to the target bitmap. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
FT_EXPORT( FT_Error )
FT_Bitmap_Copy( FT_Library library,
const FT_Bitmap *source,
FT_Bitmap *target );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Bitmap_Embolden */
/* */
/* <Description> */
/* Embolden a bitmap. The new bitmap will be about `xStrength' */
/* pixels wider and `yStrength' pixels higher. The left and bottom */
/* borders are kept unchanged. */
/* */
/* <Input> */
/* library :: A handle to a library object. */
/* */
/* xStrength :: How strong the glyph is emboldened horizontally. */
/* Expressed in 26.6 pixel format. */
/* */
/* yStrength :: How strong the glyph is emboldened vertically. */
/* Expressed in 26.6 pixel format. */
/* */
/* <InOut> */
/* bitmap :: A handle to the target bitmap. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* The current implementation restricts `xStrength' to be less than */
/* or equal to~8 if bitmap is of pixel_mode @FT_PIXEL_MODE_MONO. */
/* */
/* If you want to embolden the bitmap owned by a @FT_GlyphSlotRec, */
/* you should call @FT_GlyphSlot_Own_Bitmap on the slot first. */
/* */
/* Bitmaps in @FT_PIXEL_MODE_GRAY2 and @FT_PIXEL_MODE_GRAY@ format */
/* are converted to @FT_PIXEL_MODE_GRAY format (i.e., 8bpp). */
/* */
FT_EXPORT( FT_Error )
FT_Bitmap_Embolden( FT_Library library,
FT_Bitmap* bitmap,
FT_Pos xStrength,
FT_Pos yStrength );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Bitmap_Convert */
/* */
/* <Description> */
/* Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, 8bpp or 32bpp */
/* to a bitmap object with depth 8bpp, making the number of used */
/* bytes line (a.k.a. the `pitch') a multiple of `alignment'. */
/* */
/* <Input> */
/* library :: A handle to a library object. */
/* */
/* source :: The source bitmap. */
/* */
/* alignment :: The pitch of the bitmap is a multiple of this */
/* parameter. Common values are 1, 2, or 4. */
/* */
/* <Output> */
/* target :: The target bitmap. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* It is possible to call @FT_Bitmap_Convert multiple times without */
/* calling @FT_Bitmap_Done (the memory is simply reallocated). */
/* */
/* Use @FT_Bitmap_Done to finally remove the bitmap object. */
/* */
/* The `library' argument is taken to have access to FreeType's */
/* memory handling functions. */
/* */
FT_EXPORT( FT_Error )
FT_Bitmap_Convert( FT_Library library,
const FT_Bitmap *source,
FT_Bitmap *target,
FT_Int alignment );
/*************************************************************************/
/* */
/* <Function> */
/* FT_GlyphSlot_Own_Bitmap */
/* */
/* <Description> */
/* Make sure that a glyph slot owns `slot->bitmap'. */
/* */
/* <Input> */
/* slot :: The glyph slot. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* This function is to be used in combination with */
/* @FT_Bitmap_Embolden. */
/* */
FT_EXPORT( FT_Error )
FT_GlyphSlot_Own_Bitmap( FT_GlyphSlot slot );
/*************************************************************************/
/* */
/* <Function> */
/* FT_Bitmap_Done */
/* */
/* <Description> */
/* Destroy a bitmap object initialized with @FT_Bitmap_Init. */
/* */
/* <Input> */
/* library :: A handle to a library object. */
/* */
/* bitmap :: The bitmap object to be freed. */
/* */
/* <Return> */
/* FreeType error code. 0~means success. */
/* */
/* <Note> */
/* The `library' argument is taken to have access to FreeType's */
/* memory handling functions. */
/* */
FT_EXPORT( FT_Error )
FT_Bitmap_Done( FT_Library library,
FT_Bitmap *bitmap );
/* */
FT_END_HEADER
#endif /* FTBITMAP_H_ */
/* END */