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/***************************************************************************/
/* */
/* ftdriver.h */
/* */
/* FreeType font driver interface (specification). */
/* */
/* Copyright 1996-2000 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 FTDRIVER_H
#define FTDRIVER_H
#include "ftmodule.h"
#include "ftconfig.h" /* for FT_DEBUG_LEVEL_TRACE, */
typedef FT_Error ( *FTDriver_initFace )( FT_Stream stream,
FT_Face face,
FT_Int typeface_index,
FT_Int num_params,
FT_Parameter* parameters );
typedef void ( *FTDriver_doneFace )( FT_Face face );
typedef FT_Error ( *FTDriver_initSize )( FT_Size size );
typedef void ( *FTDriver_doneSize )( FT_Size size );
typedef FT_Error ( *FTDriver_initGlyphSlot )( FT_GlyphSlot slot );
typedef void ( *FTDriver_doneGlyphSlot )( FT_GlyphSlot slot );
typedef FT_Error ( *FTDriver_setCharSizes )( FT_Size size,
FT_F26Dot6 char_width,
FT_F26Dot6 char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution );
typedef FT_Error ( *FTDriver_setPixelSizes )( FT_Size size,
FT_UInt pixel_width,
FT_UInt pixel_height );
typedef FT_Error ( *FTDriver_loadGlyph )( FT_GlyphSlot slot,
FT_Size size,
FT_UInt glyph_index,
FT_Int load_flags );
typedef FT_UInt ( *FTDriver_getCharIndex )( FT_CharMap charmap,
FT_Long charcode );
typedef FT_Error ( *FTDriver_getKerning )( FT_Face face,
FT_UInt left_glyph,
FT_UInt right_glyph,
FT_Vector* kerning );
typedef FT_Error ( *FTDriver_attachFile )( FT_Face face,
FT_Stream stream );
typedef FT_Error ( *FTDriver_getAdvances )( FT_Face face,
FT_UInt first,
FT_UInt count,
FT_Bool vertical,
FT_UShort* advances );
/*************************************************************************/
/* */
/* <Struct> */
/* FT_Driver_Class */
/* */
/* <Description> */
/* The font driver class. This structure mostly contains pointers to */
/* driver methods. */
/* */
/* <Fields> */
/* root :: The parent module. */
/* */
/* face_object_size :: The size of a face object in bytes. */
/* */
/* size_object_size :: The size of a size object in bytes. */
/* */
/* slot_object_size :: The size of a glyph object in bytes. */
/* */
/* init_face :: The format-specific face constructor. */
/* */
/* done_face :: The format-specific face destructor. */
/* */
/* init_size :: The format-specific size constructor. */
/* */
/* done_size :: The format-specific size destructor. */
/* */
/* init_slot :: The format-specific slot constructor. */
/* */
/* done_slot :: The format-specific slot destructor. */
/* */
/* set_char_sizes :: A handle to a function used to set the new */
/* character size in points + resolution. Can be */
/* set to 0 to indicate default behaviour. */
/* */
/* set_pixel_sizes :: A handle to a function used to set the new */
/* character size in pixels. Can be set to 0 to */
/* indicate default behaviour. */
/* */
/* load_glyph :: A function handle to load a given glyph image */
/* in a slot. This field is mandatory! */
/* */
/* get_char_index :: A function handle to return the glyph index of */
/* a given character for a given charmap. This */
/* field is mandatory! */
/* */
/* get_kerning :: A function handle to return the unscaled */
/* kerning for a given pair of glyphs. Can be */
/* set to 0 if the format doesn't support */
/* kerning. */
/* */
/* attach_file :: This function handle is used to read */
/* additional data for a face from another */
/* file/stream. For example, this can be used to */
/* add data from AFM or PFM files on a Type 1 */
/* face, or a CIDMap on a CID-keyed face. */
/* */
/* get_advances :: A function handle used to return the advances */
/* of 'count' glyphs, starting at `index'. the */
/* `vertical' flags must be set when vertical */
/* advances are queried. The advances buffer is */
/* caller-allocated. */
/* */
/* <Note> */
/* Most function pointers, with the exception of `load_glyph' and */
/* `get_char_index' can be set to 0 to indicate a default behaviour. */
/* */
typedef struct FT_Driver_Class_
{
FT_Module_Class root;
FT_Int face_object_size;
FT_Int size_object_size;
FT_Int slot_object_size;
FTDriver_initFace init_face;
FTDriver_doneFace done_face;
FTDriver_initSize init_size;
FTDriver_doneSize done_size;
FTDriver_initGlyphSlot init_slot;
FTDriver_doneGlyphSlot done_slot;
FTDriver_setCharSizes set_char_sizes;
FTDriver_setPixelSizes set_pixel_sizes;
FTDriver_loadGlyph load_glyph;
FTDriver_getCharIndex get_char_index;
FTDriver_getKerning get_kerning;
FTDriver_attachFile attach_file;
FTDriver_getAdvances get_advances;
} FT_Driver_Class;
#endif /* FTDRIVER_H */
/* END */
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