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Is it possible to output alpha from the IPU Image Converter?

Question asked by Fredrik Moller on Dec 10, 2014
Latest reply on Dec 11, 2014 by Yuri Muhin

Use case: Send image buffer to the Image Converter sub-module and from there to another buffer (using IDMAC). The input image has pixels with format RGBA8888, i.e. the alpha component is contained in the buffer. The output image should preserve the alpha component.


When trying this setup the first byte in each pixel is zero in the output image, i.e. the alpha component is corrupted.


Is there a limitiation in the IPU hardware which prevents me from doing this, or have I configured the IPU in the wrong way?


I'm using an internally developed IPU driver on an RTOS.