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Author Topic: Compositing na ARGB8888 image from four L8 images  (Read 7763 times)

JeffC

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Compositing na ARGB8888 image from four L8 images
« on: June 08, 2020, 01:20:25 PM »
I was trying to compose an ARGB8888 image by overlaying four L8 images for the alpha/red/green/blue. I am not getting it right. Does anyone have a sample display list to achieve this task ?

In a second quest, I wanted to not provide the A channel, and instead use the RGB channels to create a one-bit alpha channel on the spot (wherever R, G or B is non-zero, alpha should be full on). I also didn't succeed here. Any help would be appreciated. The engine is still a bit mysterious to me even though I am trying to understand the math behind it ...

Thanks a lot !
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