| |
| #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 |
| |
| /************************************************************************** |
| * |
| * @struct: |
| * SDF_Raster_Params |
| * |
| * @description: |
| * This struct must be passed to 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. |
| * |
| * overlaps :: |
| * Set this to true to generate SDF for glyphs having overlapping |
| * contours. The overlapping support is limited to glyph which do |
| * not have self intersecting contours. Also, removing overlaps |
| * require a considerable amount of extra memory and this is not |
| * valid while generating SDF from bitmap. |
| * |
| * @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; |
| FT_Bool overlaps; |
| |
| } 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 */ |