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Rev 1892 Rev 3959
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#define CAIRO_SPANS_UNIT_COVERAGE ((1 << CAIRO_SPANS_UNIT_COVERAGE_BITS)-1)
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#define CAIRO_SPANS_UNIT_COVERAGE ((1 << CAIRO_SPANS_UNIT_COVERAGE_BITS)-1)
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/* A structure representing an open-ended horizontal span of constant
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/* A structure representing an open-ended horizontal span of constant
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 * pixel coverage. */
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 * pixel coverage. */
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typedef struct _cairo_half_open_span {
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typedef struct _cairo_half_open_span {
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    /* The inclusive x-coordinate of the start of the span. */
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    int x;
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    int32_t x; /* The inclusive x-coordinate of the start of the span. */
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    /* The pixel coverage for the pixels to the right. */
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    uint8_t coverage; /* The pixel coverage for the pixels to the right. */
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    int coverage;
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    uint8_t inverse; /* between regular mask and clip */
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} cairo_half_open_span_t;
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} cairo_half_open_span_t;
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/* Span renderer interface. Instances of renderers are provided by
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/* Span renderer interface. Instances of renderers are provided by
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typedef struct _cairo_scan_converter cairo_scan_converter_t;
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typedef struct _cairo_scan_converter cairo_scan_converter_t;
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struct _cairo_scan_converter {
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struct _cairo_scan_converter {
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    /* Destroy this scan converter. */
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    /* Destroy this scan converter. */
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    cairo_destroy_func_t	destroy;
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    cairo_destroy_func_t	destroy;
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    /* Add a single edge to the converter. */
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    cairo_status_t (*add_edge) (void		    *abstract_converter,
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				const cairo_point_t *p1,
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				const cairo_point_t *p2,
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				int top, int bottom,
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				int dir);
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    /* Add a polygon (set of edges) to the converter. */
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    cairo_status_t (*add_polygon) (void		    *abstract_converter,
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				   const cairo_polygon_t  *polygon);
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    /* Generates coverage spans for rows for the added edges and calls
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    /* Generates coverage spans for rows for the added edges and calls
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     * the renderer function for each row. After generating spans the
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     * the renderer function for each row. After generating spans the
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     * only valid thing to do with the converter is to destroy it. */
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     * only valid thing to do with the converter is to destroy it. */
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    cairo_status_t (*generate) (void			*abstract_converter,
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    cairo_status_t (*generate) (void			*abstract_converter,
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cairo_private cairo_scan_converter_t *
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cairo_private cairo_scan_converter_t *
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_cairo_tor_scan_converter_create (int			xmin,
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_cairo_tor_scan_converter_create (int			xmin,
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				  int			ymin,
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				  int			ymin,
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				  int			xmax,
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				  int			xmax,
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				  int			ymax,
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				  int			ymax,
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				  cairo_fill_rule_t	fill_rule,
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				  cairo_antialias_t	antialias);
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cairo_private cairo_status_t
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_cairo_tor_scan_converter_add_polygon (void		*converter,
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				       const cairo_polygon_t *polygon);
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cairo_private cairo_scan_converter_t *
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_cairo_tor22_scan_converter_create (int			xmin,
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				    int			ymin,
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				    int			xmax,
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				    int			ymax,
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				    cairo_fill_rule_t	fill_rule,
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				    cairo_antialias_t	antialias);
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cairo_private cairo_status_t
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_cairo_tor22_scan_converter_add_polygon (void		*converter,
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					 const cairo_polygon_t *polygon);
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cairo_private cairo_scan_converter_t *
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_cairo_mono_scan_converter_create (int			xmin,
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				   int			ymin,
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				   int			xmax,
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				   int			ymax,
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				  cairo_fill_rule_t	fill_rule);
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				   cairo_fill_rule_t	fill_rule);
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cairo_private cairo_status_t
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_cairo_mono_scan_converter_add_polygon (void		*converter,
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					const cairo_polygon_t *polygon);
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cairo_private cairo_scan_converter_t *
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_cairo_clip_tor_scan_converter_create (cairo_clip_t *clip,
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				       cairo_polygon_t *polygon,
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				       cairo_fill_rule_t fill_rule,
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				       cairo_antialias_t antialias);
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typedef struct _cairo_rectangular_scan_converter {
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typedef struct _cairo_rectangular_scan_converter {
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    cairo_scan_converter_t base;
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    cairo_scan_converter_t base;
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    int xmin, xmax;
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    int ymin, ymax;
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    cairo_box_t extents;
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    struct _cairo_rectangular_scan_converter_chunk {
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    struct _cairo_rectangular_scan_converter_chunk {