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+/***************************************************************************/
+/* */
+/* ftdriver.h */
+/* */
+/* FreeType font driver interface (specification). */
+/* */
+/* Copyright 1996-2001, 2002, 2003, 2006, 2008 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_RequestFunc)( FT_Size size,
+ FT_Size_Request req );
+
+ typedef FT_Error
+ (*FT_Size_SelectFunc)( FT_Size size,
+ FT_ULong size_index );
+
+#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
+
+ 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 );
+
+#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
+
+ 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_UInt flags,
+ FT_Fixed* 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. */
+ /* */
+ /* */
+ /* load_glyph :: A function handle to load a glyph to a slot. */
+ /* 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 advance */
+ /* widths of `count' glyphs (in font units), */
+ /* starting at `first'. The `vertical' flag must */
+ /* be set to get vertical advance heights. The */
+ /* `advances' buffer is caller-allocated. */
+ /* Currently not implemented. The idea of this */
+ /* function is to be able to perform */
+ /* device-independent text layout without loading */
+ /* a single glyph image. */
+ /* */
+ /* request_size :: A handle to a function used to request the new */
+ /* character size. Can be set to 0 if the */
+ /* scaling done in the base layer suffices. */
+ /* */
+ /* select_size :: A handle to a function used to select a new */
+ /* fixed size. It is used only if */
+ /* @FT_FACE_FLAG_FIXED_SIZES is set. Can be set */
+ /* to 0 if the scaling done in the base layer */
+ /* suffices. */
+ /* <Note> */
+ /* Most function pointers, with the exception of `load_glyph', can be */
+ /* set to 0 to indicate a default behaviour. */
+ /* */
+ typedef struct FT_Driver_ClassRec_
+ {
+ FT_Module_Class root;
+
+ FT_Long face_object_size;
+ FT_Long size_object_size;
+ FT_Long 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;
+
+#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
+
+ FT_Size_ResetPointsFunc set_char_sizes;
+ FT_Size_ResetPixelsFunc set_pixel_sizes;
+
+#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
+
+ FT_Slot_LoadFunc load_glyph;
+
+ FT_Face_GetKerningFunc get_kerning;
+ FT_Face_AttachFunc attach_file;
+ FT_Face_GetAdvancesFunc get_advances;
+
+ /* since version 2.2 */
+ FT_Size_RequestFunc request_size;
+ FT_Size_SelectFunc select_size;
+
+ } FT_Driver_ClassRec, *FT_Driver_Class;
+
+
+ /*
+ * The following functions are used as stubs for `set_char_sizes' and
+ * `set_pixel_sizes'; the code uses `request_size' and `select_size'
+ * functions instead.
+ *
+ * Implementation is in `src/base/ftobjs.c'.
+ */
+#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
+
+ FT_BASE( FT_Error )
+ ft_stub_set_char_sizes( FT_Size size,
+ FT_F26Dot6 width,
+ FT_F26Dot6 height,
+ FT_UInt horz_res,
+ FT_UInt vert_res );
+
+ FT_BASE( FT_Error )
+ ft_stub_set_pixel_sizes( FT_Size size,
+ FT_UInt width,
+ FT_UInt height );
+
+#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
+
+
+FT_END_HEADER
+
+#endif /* __FTDRIVER_H__ */
+
+
+/* END */
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