Patent ID: 8717366

Claim:
A method of rendering a stroked curve for display in a graphics processing system, the method comprising: receiving an input stroked curve defined in user space to be displayed; transforming the received stroked curve using a received transformation into a surface space for display; and for each of one or more sampling points in the surface space: determining a corresponding sampling position in a projected space; using stored predetermined information relating a width value for each length position along a projected form of the stroked curve in the projected space, which predetermined information is invariant to translation, rotation and uniform scaling of the stroked curve, to estimate the extent in a defined width direction of the projected form of the stroked curve in the projected space at a position along the length of the projected form of the stroked curve in the projected space having a same position along the length of the projected form of the stroked curve as the corresponding sampling position in the projected space; using the estimated extent in the defined width direction of the projected form of the stroked curve in the projected space at the position along the length of the projected form of the stroked curve to determine whether the corresponding sampling position in the projected space falls within the projected form of the stroked curve or not; and assigning data for rendering the received stroked curve for display to the respective sampling point in the surface space that corresponds to the corresponding sampling position in the projected space in accordance with said determination.