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#ifndef FTSDF_H_
#define FTSDF_H_
#include <ft2build.h>
#include FT_CONFIG_CONFIG_H
#include <freetype/ftimage.h>
/* common properties and function */
#include "ftsdfcommon.h"
FT_BEGIN_HEADER
/* @experimental struct: */
typedef enum Optimizations_ {
OPTIMIZATION_NONE = 0, /* default: check all points against all edges */
OPTIMIZATION_BB = 1, /* use bounding box to check nearby grid points */
OPTIMIZATION_SUB = 2, /* subdivide then use bounding box */
OPTIMIZATION_CG = 3 /* use coarse grid to only check relevant edges */
} Optimizations;
/* --------- */
/**************************************************************************
*
* @struct:
* SDF_Raster_Params
*
* @description:
* This struct must be used for the raster render function
* `FT_Raster_Render_Func' instead of `FT_Raster_Params' because
* the rasterizer require some addition information to render properly.
* So, this struct is used to pass additional parameter to the
* rasterizer.
*
* @fields:
* root ::
* The native raster params struct.
*
* spread ::
* This is and essential parameter/property required by the
* rendere. `spread' defines the maximum unsigned value that
* will be present in the final SDF output. For default value
* check `ftsdfcommon.h'.
*
* flip_sign ::
* By default the position values are inside the contours i.e.
* filled by a contour. If this property is true then that output
* will be opposite from the default i.e. negative will be filled
* by a contour.
*
* flip_y ::
* Setting this parameter to true maked the output image flipped
* along the y-axis.
*
* @note:
* It is valid for both `sdf' and `bsdf' renderer.
*
*/
typedef struct SDF_Raster_Params_
{
FT_Raster_Params root;
FT_UInt spread;
FT_Bool flip_sign;
FT_Bool flip_y;
/* @experimental fields: */
FT_Int optimization;
} SDF_Raster_Params;
/* rasterizer to convert outline to SDF */
FT_EXPORT_VAR( const FT_Raster_Funcs ) ft_sdf_raster;
/* rasterizer to convert bitmap to SDF */
FT_EXPORT_VAR( const FT_Raster_Funcs ) ft_bitmap_sdf_raster;
FT_END_HEADER
#endif /* FTSDF_H_ */
/* END */
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