forked from minhngoc25a/freetype2
81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
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#ifndef FTDENSEREND_H_
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#define FTDENSEREND_H_
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#include <freetype/ftmodapi.h>
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#include <freetype/ftrender.h>
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#include <freetype/internal/ftobjs.h>
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FT_BEGIN_HEADER
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/**************************************************************************
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*
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* @struct:
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* DENSE_Renderer_Module
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*
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* @description:
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* This struct extends the native renderer struct `FT_RendererRec`. It
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* is basically used to store various parameters required by the
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* renderer and some additional parameters that can be used to tweak the
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* output of the renderer.
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*
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* @fields:
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* root ::
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* The native rendere struct.
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*
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* spread ::
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* This is an essential parameter/property required by the renderer.
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* `spread` defines the maximum unsigned value that is present in the
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* final SDF output. For the default value check file
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* `ftsdfcommon.h`.
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*
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* flip_sign ::
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* By default positive values indicate positions inside of contours,
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* i.e., filled by a contour. If this property is true then that
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* output will be the opposite of the default, i.e., negative values
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* indicate positions inside of contours.
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*
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* flip_y ::
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* Setting this parameter to true makes the output image flipped
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* along the y-axis.
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*
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* overlaps ::
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* Set this to true to generate SDF for glyphs having overlapping
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* contours. The overlapping support is limited to glyphs that do not
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* have self-intersecting contours. Also, removing overlaps require a
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* considerable amount of extra memory; additionally, it will not work
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* if generating SDF from bitmap.
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*
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* @note:
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* All properties except `overlaps` are valid for both the 'sdf' and
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* 'bsdf' renderers.
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*
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*/
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typedef struct DENSE_Renderer_Module_
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{
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FT_RendererRec root;
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FT_UInt spread;
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FT_Bool flip_sign;
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FT_Bool flip_y;
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FT_Bool overlaps;
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} DENSE_Renderer_Module, *DENSE_Renderer;
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/**************************************************************************
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*
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* @renderer:
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* ft_sdf_renderer_class
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*
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* @description:
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* Renderer to convert @FT_Outline to signed distance fields.
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*
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*/
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FT_DECLARE_RENDERER( ft_dense_renderer_class )
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FT_END_HEADER
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#endif /* FTDENSEREND_H_ */
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/* END */
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