On Wed, 28 Sep 2011 00:34:53 -0700 Benjamin Drucker <benjamin.t.druc...@alum.mit.edu> said:
> I have am using map rotation of images in my edje script. My image, > which is a png with alpha, when rotated on the z-axis, looks like one > or two pixel colums from the right are wrapped to the left and a > couple of rows at the bottom are wrapped up to the top. Very odd. > Check out my attached .edj file. > > Is this a bug? Is there a work-around? ok. we had a few issues here. 1. your edje file was wrong with offsets. you actually were scaling the arrow up to be 32x32 pixels. i fixed it (attached edj). i also added lotsd of more testing to it as you'll see. 2. when fixed you are rotating a 31x31 image.. around a point.... problem is rotation points are integer. that means it actually offsets a bit when rotated. i suggest you make it 32x32. not much to be done here. 3. some coordinate transforms transforming the vertices's did actually round badly. fixed in svn now. 3. yes - it did round off in a particular way in the actual pixel interpolation (affine transform handler) due to the fixed point code and the way it walked texture u/v coords. i've kind of hacked it up to better handle these special cases, but in reality i should make a real special-case routine for handling 90 degree rotations (or flips) as its a much more optimal case to handle, but it's never really been common. so svn has 'better but not perfect' code. -- ------------- Codito, ergo sum - "I code, therefore I am" -------------- The Rasterman (Carsten Haitzler) ras...@rasterman.com
rot-test.edj
Description: Binary data
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