449    *
 450    *   It will use the raster corresponding to the default glyph format.
 451    *
 452    *   The value of the `num_grays` field in `abitmap` is ignored.  If you
 453    *   select the gray-level rasterizer, and you want less than 256 gray
 454    *   levels, you have to use @FT_Outline_Render directly.
 455    */
 456   FT_EXPORT( FT_Error )
 457   FT_Outline_Get_Bitmap( FT_Library        library,
 458                          FT_Outline*       outline,
 459                          const FT_Bitmap  *abitmap );
 460 
 461 
 462   /**************************************************************************
 463    *
 464    * @function:
 465    *   FT_Outline_Render
 466    *
 467    * @description:
 468    *   Render an outline within a bitmap using the current scan-convert.
 469    *   This function uses an @FT_Raster_Params structure as an argument,
 470    *   allowing advanced features like direct composition, translucency, etc.
 471    *
 472    * @input:
 473    *   library ::
 474    *     A handle to a FreeType library object.
 475    *
 476    *   outline ::
 477    *     A pointer to the source outline descriptor.
 478    *
 479    * @inout:
 480    *   params ::
 481    *     A pointer to an @FT_Raster_Params structure used to describe the
 482    *     rendering operation.
 483    *
 484    * @return:
 485    *   FreeType error code.  0~means success.
 486    *
 487    * @note:
 488    *   You should know what you are doing and how @FT_Raster_Params works to
 489    *   use this function.


 490    *
 491    *   The field `params.source` will be set to `outline` before the scan
 492    *   converter is called, which means that the value you give to it is
 493    *   actually ignored.
 494    *
 495    *   The gray-level rasterizer always uses 256 gray levels.  If you want
 496    *   less gray levels, you have to provide your own span callback.  See the
 497    *   @FT_RASTER_FLAG_DIRECT value of the `flags` field in the
 498    *   @FT_Raster_Params structure for more details.
 499    */
 500   FT_EXPORT( FT_Error )
 501   FT_Outline_Render( FT_Library         library,
 502                      FT_Outline*        outline,
 503                      FT_Raster_Params*  params );
 504 
 505 
 506   /**************************************************************************
 507    *
 508    * @enum:
 509    *   FT_Orientation

 449    *
 450    *   It will use the raster corresponding to the default glyph format.
 451    *
 452    *   The value of the `num_grays` field in `abitmap` is ignored.  If you
 453    *   select the gray-level rasterizer, and you want less than 256 gray
 454    *   levels, you have to use @FT_Outline_Render directly.
 455    */
 456   FT_EXPORT( FT_Error )
 457   FT_Outline_Get_Bitmap( FT_Library        library,
 458                          FT_Outline*       outline,
 459                          const FT_Bitmap  *abitmap );
 460 
 461 
 462   /**************************************************************************
 463    *
 464    * @function:
 465    *   FT_Outline_Render
 466    *
 467    * @description:
 468    *   Render an outline within a bitmap using the current scan-convert.


 469    *
 470    * @input:
 471    *   library ::
 472    *     A handle to a FreeType library object.
 473    *
 474    *   outline ::
 475    *     A pointer to the source outline descriptor.
 476    *
 477    * @inout:
 478    *   params ::
 479    *     A pointer to an @FT_Raster_Params structure used to describe the
 480    *     rendering operation.
 481    *
 482    * @return:
 483    *   FreeType error code.  0~means success.
 484    *
 485    * @note:
 486    *   This advanced function uses @FT_Raster_Params as an argument,
 487    *   allowing FreeType rasterizer to be used for direct composition,
 488    *   translucency, etc.  You should know how to set up @FT_Raster_Params
 489    *   for this function to work.
 490    *
 491    *   The field `params.source` will be set to `outline` before the scan
 492    *   converter is called, which means that the value you give to it is
 493    *   actually ignored.
 494    *
 495    *   The gray-level rasterizer always uses 256 gray levels.  If you want
 496    *   less gray levels, you have to provide your own span callback.  See the
 497    *   @FT_RASTER_FLAG_DIRECT value of the `flags` field in the
 498    *   @FT_Raster_Params structure for more details.
 499    */
 500   FT_EXPORT( FT_Error )
 501   FT_Outline_Render( FT_Library         library,
 502                      FT_Outline*        outline,
 503                      FT_Raster_Params*  params );
 504 
 505 
 506   /**************************************************************************
 507    *
 508    * @enum:
 509    *   FT_Orientation