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  Overlaying a colour over existing colour  (Read 1378 times)
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Offline Porlus

Junior Devvie





« Posted 2012-05-24 02:36:52 »

Hi, I've just been trying to think about how I'd do this but I've hit a brick wall. I have a pixel array containing the colours held at each pixel on the screen, but I'm trying to overlay a certain colour. I started by just looping through each pixel in the array and bitwise ANDing each colour by 0xFFFF0000 to give it a red tinge. However what I really need it to do is overlay a certain transparency of this colour, so ranging from a slight tinge to completely red with none of the original pixels showing. Does anyone know how I could achieve this?

Thanks,
Paul
Offline ra4king

JGO Kernel


Medals: 356
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I'm the King!


« Reply #1 - Posted 2012-05-24 03:06:44 »

Simply modify the value of alpha or the value of the red component.

Offline Porlus

Junior Devvie





« Reply #2 - Posted 2012-05-24 03:35:06 »

Ah, cool. Cheesy Thanks.
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