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freetype2
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freetype
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ftrender.h
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/***************************************************************************/ /* */ /* ftrender.h */ /* */ /* FreeType renderer modules public interface (specification). */ /* */ /* Copyright 1996-2017 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 <ft2build.h> #include FT_MODULE_H #include FT_GLYPH_H FT_BEGIN_HEADER /*************************************************************************/ /* */ /* <Section> */ /* module_management */ /* */ /*************************************************************************/ /* create a new glyph object */ typedef FT_Error (*FT_Glyph_InitFunc)( FT_Glyph glyph, FT_GlyphSlot slot ); /* destroys a given glyph object */ typedef void (*FT_Glyph_DoneFunc)( FT_Glyph glyph ); typedef void (*FT_Glyph_TransformFunc)( FT_Glyph glyph, const FT_Matrix* matrix, const FT_Vector* delta ); typedef void (*FT_Glyph_GetBBoxFunc)( FT_Glyph glyph, FT_BBox* abbox ); typedef FT_Error (*FT_Glyph_CopyFunc)( FT_Glyph source, FT_Glyph target ); typedef FT_Error (*FT_Glyph_PrepareFunc)( FT_Glyph glyph, FT_GlyphSlot slot ); /* deprecated */ #define FT_Glyph_Init_Func FT_Glyph_InitFunc #define FT_Glyph_Done_Func FT_Glyph_DoneFunc #define FT_Glyph_Transform_Func FT_Glyph_TransformFunc #define FT_Glyph_BBox_Func FT_Glyph_GetBBoxFunc #define FT_Glyph_Copy_Func FT_Glyph_CopyFunc #define FT_Glyph_Prepare_Func FT_Glyph_PrepareFunc struct FT_Glyph_Class_ { FT_Long glyph_size; FT_Glyph_Format glyph_format; FT_Glyph_InitFunc glyph_init; FT_Glyph_DoneFunc glyph_done; FT_Glyph_CopyFunc glyph_copy; FT_Glyph_TransformFunc glyph_transform; FT_Glyph_GetBBoxFunc glyph_bbox; FT_Glyph_PrepareFunc glyph_prepare; }; typedef FT_Error (*FT_Renderer_RenderFunc)( FT_Renderer renderer, FT_GlyphSlot slot, FT_UInt mode, const FT_Vector* origin ); typedef FT_Error (*FT_Renderer_TransformFunc)( FT_Renderer renderer, FT_GlyphSlot slot, const FT_Matrix* matrix, const FT_Vector* delta ); typedef void (*FT_Renderer_GetCBoxFunc)( FT_Renderer renderer, FT_GlyphSlot slot, FT_BBox* cbox ); typedef FT_Error (*FT_Renderer_SetModeFunc)( FT_Renderer renderer, FT_ULong mode_tag, FT_Pointer mode_ptr ); /* deprecated identifiers */ #define FTRenderer_render FT_Renderer_RenderFunc #define FTRenderer_transform FT_Renderer_TransformFunc #define FTRenderer_getCBox FT_Renderer_GetCBoxFunc #define FTRenderer_setMode FT_Renderer_SetModeFunc /*************************************************************************/ /* */ /* <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. */ /* */ /* transform_glyph :: A method used to transform the image that is in */ /* a given glyph slot. */ /* */ /* get_glyph_cbox :: A method used to access the glyph's cbox. */ /* */ /* 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. */ /* */ typedef struct FT_Renderer_Class_ { FT_Module_Class root; FT_Glyph_Format glyph_format; FT_Renderer_RenderFunc render_glyph; FT_Renderer_TransformFunc transform_glyph; FT_Renderer_GetCBoxFunc get_glyph_cbox; FT_Renderer_SetModeFunc set_mode; FT_Raster_Funcs* raster_class; } FT_Renderer_Class; /*************************************************************************/ /* */ /* <Function> */ /* FT_Get_Renderer */ /* */ /* <Description> */ /* Retrieve the current renderer for a given glyph format. */ /* */ /* <Input> */ /* library :: A handle to the library object. */ /* */ /* format :: The glyph format. */ /* */ /* <Return> */ /* A 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( FT_Renderer ) FT_Get_Renderer( FT_Library library, FT_Glyph_Format format ); /*************************************************************************/ /* */ /* <Function> */ /* FT_Set_Renderer */ /* */ /* <Description> */ /* Set the current renderer to use, and set additional mode. */ /* */ /* <InOut> */ /* library :: A handle to the library object. */ /* */ /* <Input> */ /* renderer :: A handle to the renderer object. */ /* */ /* num_params :: The number of additional parameters. */ /* */ /* parameters :: Additional parameters. */ /* */ /* <Return> */ /* FreeType 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. */ /* */ /* Currently, no FreeType renderer module uses `parameters'; you */ /* should thus always pass NULL as the value. */ /* */ FT_EXPORT( FT_Error ) FT_Set_Renderer( FT_Library library, FT_Renderer renderer, FT_UInt num_params, FT_Parameter* parameters ); /* */ FT_END_HEADER #endif /* FTRENDER_H_ */ /* END */