with or without point anti-alias enabled, point size of 2.6, a vertex point drawn at different position will have different shape. And also, the anti-alias doesn't seem to function.
Created attachment 10801 [details] test case point anti-alias is enabled , and point size is set to 2.6 draw a vertex point at the center of the window clear the window and draw a new vertex point have a small offset to the center. the RGB value of pixels drawn will be display
The geometries are different because the vertex is shifted by a sub-pixel length. As long as sub-pixel rendering is not used: XXX offset 0.0: XXX Vertex centre is on a pixel: XXX 2n+1 pixels must be used to keep symmetry XX offset 0.5: XXXX Vertex centre is between two pixels: XX 2n pixels must be used to keep symmetry XXX offset 1.0: XXX (Vertex centre is again on a pixel) XXX BTW, using fglrx (ATI X1300) I get a red dot, using ati (ATI X700) I get a dark yellow dot...
Fixed in mesa.
verified, thanks
Mass version move, cvs -> git
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.