Pyqt maya convert .iff to .jpeg

Coding
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1

hi there

is it possible to convert .iff image in maya into .jpeg using QImage class? :?:

2

import maya.OpenMaya as mom

mayaImage = mom.MImage()
mayaImage.readFromFile(“someIffImage.iff”)
# get image dimensions
scriptUtilw = mom.MScriptUtil()
scriptUtilh = mom.MScriptUtil()
wPtr = scriptUtilw.asUintPtr()
hPtr = scriptUtilh.asUintPtr()
mayaImage.getSize( wPtr, hPtr )
twidth = scriptUtilw.getUint(wPtr)
theight = scriptUtilh.getUint(hPtr)
# get a byte-pointer to the image data in the memory
pixelPtr = mayaImage.pixels()
pA = ctypes.cast( pixelPtr.long(), ctypes.POINTER( ctypes.c_char ) )
# get the image data as string
pAstring=ctypes.string_at(pA, twidththeight4)

pAstring is holds your picture - 32 bit RGBA in this case
You should be able to construct a QImage with QImage(pAstring,twidth,theight,Qt.QImage.Format_ARGB32)

you might also have to use QImages .mirrored() function if the IFF ends up being upside down. If the colors are wrong then it’s just a case of R and B being swapped - QT has a function for this as well (.rgbSwapped()).

Some versions of Maya (x64?) are missing ctypes though - but you can install it yourself by downloading them and adding them to the pythonpath and then import them.

3

thanks robert for quick reply

is it possible to crop perticular region?

4

crop it in Qt. I haven’t done this but my guess is that you need to create a new QBitmap or QImage and then use it as paint device and paint the bigger bitmap into it.

But if you’re lucky, maybe QImage has a crop function somewhere…

5

hi all

can i implement iff into qt ?

is there any method to add new file format into qt

thanks and regards

mossin

6

Could try this…
http://blarg.robertkist.com/?p=16

It’s an IFF loader module, based on Gimp’s code (might want to check the license). I turned it into a module. It can only read though. You can then pass the RGB/RGBA image buffer to PIL or Qt and make an image.