Activating a filling of a graphical object

A method as claimed in 1, wherein said method performs said generating and activating steps in one mode of operation and said method performs the following steps in another mode of operation:

• generating, for a current scanline, an edge record associated with said edge from a previously generated said edge record for a previous scanline, wherein said edge record for the current scanline comprises fractional data which defines an exit position of the edge from the current scanline, and said previously generated edge record comprises fractional data defining a exit point of the edge from the previous scanline;
• and
• activating, for the current scanline, the filling of an object over a run of pixels or pixel within the object commencing at a scanline location equal to a rounded value of said fractional data defining said exit point.

A method of activating a filling of a graphical object, the method comprising the steps of:

• generating, for a current scanline, three edge records associated with an edge of the object from a previously generated said edge record for a previous scanline, wherein one of said edge records for the current scanline comprises data which defines a rounded down value of a minimum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline, one of said edge records for the current scanline comprises data which defines a rounded up value of a maximum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline, and one of said edge records for the current scanline comprises fractional data which defines an exit position of the edge from the current scanline, and wherein said previously generated edge record comprises fractional data defining a exit point of the edge from the previous scanline;
• and
• activating, for the current scanline, the filling of the graphical object over a run of pixels or pixel from the rounded down value to the rounded up value.

Apparatus for activating a filling of a graphical object, the apparatus comprising:

• means for generating, for a current scanline, three edge records associated with an edge of the object from a previously generated said edge record for a previous scanline, wherein one of said edge records for the current scanline comprises data which defines a rounded down value of a minimum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline, one of said edge records for the current scanline comprises data which defines a rounded up value of a maximum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline, and one of said edge records for the current scanline comprises fractional data which defines an exit position of the edge from the current scanline, and wherein said previously generated edge record comprises fractional data defining a exit point of the edge from the previous scanline;
• and
• means for activating, for the current scanline, the filling of the graphical object over a run of pixels or pixel from the rounded down value to the rounded up value.

A computer program for activating a filling of a graphical object, the computer program comprising:

• code for generating, for a current scanline, three edge records associated with an edge of the object from a previously generated said edge record for a previous scanline, wherein one of said edge records for the current scanline comprises data which defines a rounded down value of a minimum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline, one of said edge records for the current scanline comprises data which defines a rounded up value of a maximum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline, and one of said edge records for the current scanline comprises fractional data which defines an exit position of the edge from the current scanline, and wherein said previously generated edge record comprises fractional data defining a exit point of the edge from the previous scanline;
• and
• code for activating, for the current scanline, the filling of the graphical object over a run of pixels or pixel from the rounded down value to the rounded up value.

A method of activating a filing of a graphical object, the method comprising the steps of:

• generating, for a current scanline, a plurality of edge records associated with an edge of the object from a previously generated said edge record for a previous scanline, wherein one of said edge records for the current scanline comprises fractional data which defines a minimum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline, and one of said edge records for the current scanline comprises fractional data which defines a maximum position of the edge within the current scanline or on a border thereto with respect to a direction along said current scanline;
• and
• activating, for the current scanline, the filing of the graphical object over a run of pixels or pixel from a minimum pixel position to a maximum pixel position, wherein said minimum pixel position is derived from rounding down a value equal to said fractional data of said edge record defining said minimum position, and said maximum pixel position is derived from rounding up a value equal to said fractional data of said edge record defining said maximum position.