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

Bill Spitzak spitzak at gmail.com
Fri Oct 3 13:08:13 PDT 2014

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.

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