[RFC weston 13/16] compositor: Add a function to test if images transformed by a matrix should be bilinearly filtered

[Bill Spitzak]

On 10/03/2014 12:04 AM, Pekka Paalanen wrote:

> For the gl-renderer this means much bigger changes: the renderer
> receives a pixels-to-pixels transformation matrix which is the
> canonical form, and then it needs to adapt it to the normalized GL
> coordinate system.

I usually change the GL viewport projection matrix so that it is in 
pixels rathern than the "normalized" coordinates. Then this matrix is 
used unchanged.