Hi Laurent,
On 7/10/15 2:08 PM, Laurent Bourgès wrote:
Few ideas to discuss:
1/ I wonder now if the gridding = ceil (x/y - 0.5) should be done
differently: why not apply the offset to - 0.5 to points before curve
decimation or adding lines: it may saves a lot of substractions:
AddLine (x1,y1,x2,y2) implies 4 substractions whereas lineTo (x2,y2)
only needs to adjust the last point.
Idem for curve decimation, shifting points may help.
I like this idea - you can bake the translation into the transform that
is applied prior to the rasterizer so there is no added work being done.
- do you know if the breakCurveAndAddLines (quad or cubic) really takes
into account the supersampling scale to generate only segments needed
and no more ?
I don't remember. I'd have to read the code and figure it out.
- I use fixed-point (32.32 + error) as you did but it is maybe too
precise: the slope, bumpx and error could be determined from integer
coordinates for starting / ending points = ceil (x1 - 0.5), ceil (y -
0.5) directly
I don't understand what you are getting at here...?
...jim
