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/***************************************************************************/
/* */
/* ftrender.h */
/* */
/* FreeType renderer modules public interface */
/* */
/* 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 FTRENDER_H
#define FTRENDER_H
#include <freetype/ftmodule.h>
/*************************************************************************
*
* <Struct>
* FT_Renderer_Class
*
* <Description>
* The renderer module class descriptor.
*
* <Fields>
* root :: the root FT_Module_Class fields
*
* glyph_format :: the glyph image format this renderer handles
*
* render_glyph :: a method used to render the image that is in a
* given glyph slot into a bitmap.
*
* set_mode :: a method used to pass additional parameters
*
* raster_class :: for ft_glyph_format_outline renderers only, this
* is a pointer to its raster's class.
*
* raster :: for ft_glyph_format_outline renderers only. this
* is a pointer to the corresponding raster object,
* if any..
*
*************************************************************************/
typedef FT_Error (*FTRenderer_render)( FT_Renderer renderer,
FT_GlyphSlot slot,
FT_UInt mode );
typedef FT_Error (*FTRenderer_transform)( FT_Renderer renderer,
FT_GlyphSlot slot,
FT_Matrix* matrix,
FT_Vector* delta );
typedef void (*FTRenderer_getCBox)( FT_Renderer renderer,
FT_GlyphSlot slot,
FT_BBox *cbox );
typedef FT_Error (*FTRenderer_setMode)( FT_Renderer renderer,
FT_ULong mode_tag,
FT_Pointer mode_ptr );
typedef struct FT_Renderer_Class_
{
FT_Module_Class root;
FT_Glyph_Format glyph_format;
FTRenderer_render render_glyph;
FTRenderer_transform transform_glyph;
FTRenderer_getCBox get_glyph_cbox;
FTRenderer_setMode set_mode;
FT_Raster_Funcs* raster_class;
} FT_Renderer_Class;
enum
{
ft_render_mode_antialias = 1
};
/*************************************************************************
*
* <Function>
* FT_Get_Renderer
*
* <Description>
* retrieves the current renderer for a given glyph format.
*
* <Input>
* library :: handle to library object
* format :: glyph format
*
* <Return>
* renderer handle. 0 if none found.
*
* <Note>
* An error will be returned if a module already exists by that
* name, or if the module requires a version of freetype that is
* too great
*
* To add a new renderer, simply use FT_Add_Module. To retrieve
* a renderer by its name, use FT_Get_Module
*
*************************************************************************/
FT_EXPORT_DEF(FT_Renderer) FT_Get_Renderer( FT_Library library,
FT_Glyph_Format format );
/*************************************************************************
*
* <Function>
* FT_Set_Renderer
*
* <Description>
* Sets the current renderer to use, and set additional mode
*
* <Input>
* library :: handle to library object
* renderer :: handle to renderer object
* num_params :: number of additional parameters
* params :: additional parameters
*
* <Return>
* Error code. 0 means success.
*
* <Note>
* in case of success, the renderer will be used to convert glyph
* images in the renderer's known format into bitmaps.
*
* This doesn't change the current renderer for other formats..
*
*************************************************************************/
FT_EXPORT_DEF(FT_Error) FT_Set_Renderer( FT_Library library,
FT_Renderer renderer,
FT_UInt num_params,
FT_Parameter* parameters );
#endif /* FTMODULE_H */
/* END */
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