214 lines
10 KiB
C
214 lines
10 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 (specification). */
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/* */
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/* Copyright 1996-2001 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 <ft2build.h>
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#include FT_MODULE_H
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#include FT_GLYPH_H
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FT_BEGIN_HEADER
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/*************************************************************************/
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/* */
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/* <Section> */
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/* module_management */
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/* */
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/*************************************************************************/
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/* create a new glyph object */
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typedef FT_Error
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(*FT_Glyph_Init_Func)( FT_Glyph glyph,
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FT_GlyphSlot slot );
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/* destroys a given glyph object */
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typedef void
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(*FT_Glyph_Done_Func)( FT_Glyph glyph );
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typedef void
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(*FT_Glyph_Transform_Func)( FT_Glyph glyph,
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FT_Matrix* matrix,
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FT_Vector* delta );
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typedef void
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(*FT_Glyph_BBox_Func)( FT_Glyph glyph,
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FT_BBox* abbox );
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typedef FT_Error
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(*FT_Glyph_Copy_Func)( FT_Glyph source,
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FT_Glyph target );
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typedef FT_Error
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(*FT_Glyph_Prepare_Func)( FT_Glyph glyph,
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FT_GlyphSlot slot );
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struct FT_Glyph_Class_
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{
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FT_UInt glyph_size;
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FT_Glyph_Format glyph_format;
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FT_Glyph_Init_Func glyph_init;
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FT_Glyph_Done_Func glyph_done;
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FT_Glyph_Copy_Func glyph_copy;
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FT_Glyph_Transform_Func glyph_transform;
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FT_Glyph_BBox_Func glyph_bbox;
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FT_Glyph_Prepare_Func glyph_prepare;
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};
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typedef FT_Error
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(*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
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(*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
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(*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
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(*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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/*************************************************************************/
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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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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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/*************************************************************************/
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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 :: A handle to the library object. */
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/* */
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/* format :: The glyph format. */
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/* */
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/* <Return> */
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/* A 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 name, */
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/* or if the module requires a version of FreeType that is too great. */
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/* */
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/* To add a new renderer, simply use FT_Add_Module(). To retrieve a */
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/* renderer by its name, use FT_Get_Module(). */
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/* */
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FT_EXPORT( FT_Renderer )
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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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/* <InOut> */
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/* library :: A handle to the library object. */
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/* */
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/* <Input> */
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/* renderer :: A handle to the renderer object. */
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/* */
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/* num_params :: The number of additional parameters. */
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/* */
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/* parameters :: Additional parameters. */
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/* */
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/* <Return> */
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/* FreeType 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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FT_EXPORT( FT_Error )
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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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/* */
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FT_END_HEADER
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#endif /* __FTRENDER_H__ */
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/* END */
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