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Edit File : ftrender.h \| Size : 11.05 KB
/**************************************************************************/ / / / ftrender.h / / / / FreeType renderer modules public interface (specification). / / / / Copyright 1996-2018 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_Render_Mode 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 */ Back

Edit File : ftrender.h | Size : 11.05 KB

/***************************************************************************/
/*                                                                         */
/*  ftrender.h                                                             */
/*                                                                         */
/*    FreeType renderer modules public interface (specification).          */
/*                                                                         */
/*  Copyright 1996-2018 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_Render_Mode    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 */

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