154 lines
5.5 KiB
C
154 lines
5.5 KiB
C
/***************************************************************************/
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/* */
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/* ftrender.h */
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/* */
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/* FreeType renderer modules public interface */
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/* */
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/* Copyright 1996-2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used */
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/* modified and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef FTRENDER_H
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#define FTRENDER_H
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#include <freetype/ftmodule.h>
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/*************************************************************************
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*
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* <Struct>
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* FT_Renderer_Class
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*
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* <Description>
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* The renderer module class descriptor.
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*
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* <Fields>
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* root :: the root FT_Module_Class fields
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*
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* glyph_format :: the glyph image format this renderer handles
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*
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* render_glyph :: a method used to render the image that is in a
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* given glyph slot into a bitmap.
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*
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* set_mode :: a method used to pass additional parameters
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*
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* raster_class :: for ft_glyph_format_outline renderers only, this
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* is a pointer to its raster's class.
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*
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* raster :: for ft_glyph_format_outline renderers only. this
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* is a pointer to the corresponding raster object,
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* if any..
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*
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*************************************************************************/
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typedef FT_Error (*FTRenderer_render)( FT_Renderer renderer,
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FT_GlyphSlot slot,
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FT_UInt mode,
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FT_Vector* origin );
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typedef FT_Error (*FTRenderer_transform)( FT_Renderer renderer,
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FT_GlyphSlot slot,
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FT_Matrix* matrix,
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FT_Vector* delta );
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typedef void (*FTRenderer_getCBox)( FT_Renderer renderer,
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FT_GlyphSlot slot,
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FT_BBox *cbox );
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typedef FT_Error (*FTRenderer_setMode)( FT_Renderer renderer,
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FT_ULong mode_tag,
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FT_Pointer mode_ptr );
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typedef struct FT_Renderer_Class_
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{
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FT_Module_Class root;
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FT_Glyph_Format glyph_format;
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FTRenderer_render render_glyph;
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FTRenderer_transform transform_glyph;
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FTRenderer_getCBox get_glyph_cbox;
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FTRenderer_setMode set_mode;
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FT_Raster_Funcs* raster_class;
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} FT_Renderer_Class;
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enum
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{
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ft_render_mode_antialias = 1
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};
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/*************************************************************************
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*
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* <Function>
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* FT_Get_Renderer
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*
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* <Description>
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* retrieves the current renderer for a given glyph format.
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*
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* <Input>
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* library :: handle to library object
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* format :: glyph format
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*
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* <Return>
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* renderer handle. 0 if none found.
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*
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* <Note>
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* An error will be returned if a module already exists by that
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* name, or if the module requires a version of freetype that is
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* too great
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*
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* To add a new renderer, simply use FT_Add_Module. To retrieve
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* a renderer by its name, use FT_Get_Module
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*
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*************************************************************************/
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FT_EXPORT_DEF(FT_Renderer) FT_Get_Renderer( FT_Library library,
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FT_Glyph_Format format );
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/*************************************************************************
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*
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* <Function>
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* FT_Set_Renderer
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*
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* <Description>
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* Sets the current renderer to use, and set additional mode
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*
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* <Input>
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* library :: handle to library object
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* renderer :: handle to renderer object
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* num_params :: number of additional parameters
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* params :: additional parameters
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*
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* <Return>
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* Error code. 0 means success.
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*
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* <Note>
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* in case of success, the renderer will be used to convert glyph
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* images in the renderer's known format into bitmaps.
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*
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* This doesn't change the current renderer for other formats..
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*
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*************************************************************************/
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FT_EXPORT_DEF(FT_Error) FT_Set_Renderer( FT_Library library,
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FT_Renderer renderer,
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FT_UInt num_params,
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FT_Parameter* parameters );
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#endif /* FTMODULE_H */
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/* END */
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