Re: [Mesa-dev] Second derivatives and ARB_derivative_control

2014-08-12 Thread Ilia Mirkin
On Tue, Aug 12, 2014 at 3:08 PM, Ilia Mirkin wrote: > Hello, > > I was looking at the ARB_derivative_control spec and it has this bit: > > "It is typical to consider a 2x2 square of fragments or samples, and > compute independent dFdxFine per row and independent dFdyFine per column, >

[Mesa-dev] Second derivatives and ARB_derivative_control

2014-08-12 Thread Ilia Mirkin
Hello, I was looking at the ARB_derivative_control spec and it has this bit: "It is typical to consider a 2x2 square of fragments or samples, and compute independent dFdxFine per row and independent dFdyFine per column, while computing only a single dFdxCoarse and a single dFdyCoarse