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Image Manipulation

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Image Manipulation

Postby Baker » Wed Feb 08, 2012 1:37 am

The night is young. How else can I annoy the world before sunsrise? 8) Inquisitive minds want to know ! And if they don't -- well like that ever has stopped me before ..
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Re: Image Manipulation

Postby qbism » Wed Feb 08, 2012 2:33 am

And this was easier than Layer->Transparency->Add Alpha Channel ?! :D
I like PIXOP_ALPHA_FROM_COLOR. It represents many alpha conditions. It could replace large alpha tgas with smaller jpegs. Could add attenuation factor, where alpha is proportional to average squared for example. Also, PIXOP_ALPHA_FROM_RGB where a specific color becomes alpha.
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Re: Image Manipulation

Postby Spike » Wed Feb 08, 2012 2:50 am

glBlendFunc(GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR);
then you don't need an alpha channel.
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Re: Image Manipulation

Postby Baker » Wed Feb 08, 2012 3:48 am

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Re: Image Manipulation

Postby andrewj » Wed Feb 08, 2012 7:29 am

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Re: Image Manipulation

Postby goldenboy » Wed Feb 08, 2012 4:52 pm

I think Gimp has a color to alpha filter as well.
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Re: Image Manipulation

Postby mh » Wed Feb 08, 2012 5:40 pm

Most of the time I'd just do this kind of thing in a shader. GPUs are better at this work and the image won't need preprocessing.
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Re: Image Manipulation

Postby revelator » Wed Feb 08, 2012 6:00 pm

Productivity is a state of mind.
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Re: Image Manipulation

Postby qbism » Thu Feb 09, 2012 2:09 am

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Re: Image Manipulation

Postby Baker » Thu Feb 09, 2012 4:13 am

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Re: Image Manipulation

Postby Baker » Thu Feb 09, 2012 6:41 am

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Re: Image Manipulation

Postby Baker » Thu Feb 09, 2012 7:27 am

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Re: Image Manipulation

Postby Baker » Thu Feb 09, 2012 7:58 pm

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Re: Image Manipulation

Postby andrewj » Fri Feb 10, 2012 2:24 am

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Re: Image Manipulation

Postby Baker » Fri Feb 10, 2012 3:29 am

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