Image Manipulation

[Andrea V. <and...@gm...>]

Hello Christian!

How much time has passed! 
Sometime I continue to play with Pipmak, I always have very little time to
spend on it, unfortunately!

However I am getting the idea that pipmak remains a great platform and I'm
sorry that remains little known and used.
I think you should release a new version (0.2.8) which includes all the
latest innovations added to the 0.2.7 in recent years.

If you had a little time to do this, I'd like that you add some additional
functions of image manipulation.

In particular, to slightly modify the "drawimage" adding the ability to use
some combination operation in addition to the current mode.

You'll tell me, why? Because I have not abandoned my old project
"autocubic", and I also got to a good point, but I have several problems
with the projection of shadows, which are of great help to make it more
realistic ...
At the moment, I overlap several patches , but by doing so, the effect isn't
the best.
I think it would just add the "mode" parameter:
mode = replace (current mode and used by default if mode is omitted)
mode = or, xor mode =, mode = add, etc. implement new composition mode

Another useful thing: "rotateimage" (and I think also simple to implement)
to rotate an image (even with 90 degree angles would already be useful, but
with any angle would be the best!)
yes, I know that I can rotate the patch, but this feature would be useful 
combined with the drawimage function, when I want to "copy" turned areas
from a imagine to another (which it is not rotated ..)

Even a "getpixel(x, y)" would not hurt, could return (r, g, b, alpha) of a
given pixel, this could permit to write in lua other manipulation functions
not directly implemented (or "missed" yet) in pipmak.

The last thing, though perhaps is the most complex, the implementation of
depth buffer in the positioning of 3d patches ....  I had tried, but with
poor results (sigh!), so they I forced to do complex calculations to
determine the order in which I have to draw the patches ...

A warm greeting.

Andrea