/***************************************************************************/ /* */ /* ftdriver.h */ /* */ /* FreeType font driver interface (specification). */ /* */ /* Copyright 1996-2001, 2002 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 <ft2build.h> #include FT_MODULE_H FT_BEGIN_HEADER typedef FT_Error (*FT_Face_InitFunc)( FT_Stream stream, FT_Face face, FT_Int typeface_index, FT_Int num_params, FT_Parameter* parameters ); typedef void (*FT_Face_DoneFunc)( FT_Face face ); typedef FT_Error (*FT_Size_InitFunc)( FT_Size size ); typedef void (*FT_Size_DoneFunc)( FT_Size size ); typedef FT_Error (*FT_Slot_InitFunc)( FT_GlyphSlot slot ); typedef void (*FT_Slot_DoneFunc)( FT_GlyphSlot slot ); typedef FT_Error (*FT_Size_ResetPointsFunc)( FT_Size size, FT_F26Dot6 char_width, FT_F26Dot6 char_height, FT_UInt horz_resolution, FT_UInt vert_resolution ); typedef FT_Error (*FT_Size_ResetPixelsFunc)( FT_Size size, FT_UInt pixel_width, FT_UInt pixel_height ); typedef FT_Error (*FT_Slot_LoadFunc)( FT_GlyphSlot slot, FT_Size size, FT_UInt glyph_index, FT_Int32 load_flags ); typedef FT_UInt (*FT_CharMap_CharIndexFunc)( FT_CharMap charmap, FT_Long charcode ); typedef FT_Long (*FT_CharMap_CharNextFunc)( FT_CharMap charmap, FT_Long charcode ); typedef FT_Error (*FT_Face_GetKerningFunc)( FT_Face face, FT_UInt left_glyph, FT_UInt right_glyph, FT_Vector* kerning ); typedef FT_Error (*FT_Face_AttachFunc)( FT_Face face, FT_Stream stream ); typedef FT_Error (*FT_Face_GetAdvancesFunc)( FT_Face face, FT_UInt first, FT_UInt count, FT_Bool vertical, FT_UShort* advances ); /*************************************************************************/ /* */ /* <Struct> */ /* FT_Driver_ClassRec */ /* */ /* <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_ClassRec_ { FT_Module_Class root; FT_Int face_object_size; FT_Int size_object_size; FT_Int slot_object_size; FT_Face_InitFunc init_face; FT_Face_DoneFunc done_face; FT_Size_InitFunc init_size; FT_Size_DoneFunc done_size; FT_Slot_InitFunc init_slot; FT_Slot_DoneFunc done_slot; FT_Size_ResetPointsFunc set_char_sizes; FT_Size_ResetPixelsFunc set_pixel_sizes; FT_Slot_LoadFunc load_glyph; FT_Face_GetKerningFunc get_kerning; FT_Face_AttachFunc attach_file; FT_Face_GetAdvancesFunc get_advances; } FT_Driver_ClassRec, *FT_Driver_Class; FT_END_HEADER #endif /* __FTDRIVER_H__ */ /* END */