30-bit "deep color"

Programming Questions

bhenry1790

in Programming Questions • 2 years ago

Is Java / Processing is capable of rendering 30-bit colors?

I know I can set "colorMode(RGB, 1024);", but is this mode accurately translated to the video device or is it reduced back down to 256 levels prior to display?

I'm interested to know because I have a HDMI 1.3 compatible "deep color" display and several sketches that would benefit from the greater color fidelity. If Processing can render the colors I will pick up a new 30-bit video card.

Thanks in advance for any input you can provide.

Replies(2)

davbol

Re: 30-bit "deep color"

2 years ago

no, not natively, all renderers are using 8-bit per channel surfaces. colorMode() merely allows you to set the scale of units that those 256 levels map into/from.

however, there's a possible path via opengl, assuming you're using that renderer, and are fluent enough to modify the PGraphicsOpenGL renderer source code, and assuming the necessary extensions/pixel formats/etc are all "visible" to the version of JOGL in use (may depend on how vendor implements this feature).

then you'll need to search for sample code on setting up an appropriate pixel format buffer for your video card (search the mfr's "dev" area) and then plug equivalent code into a modified version of PGraphicsOpenGL. (or switch to "native" -style OpenGL coding, tho that may entail big changes elsewhere also)

then cross fingers, init gl, and if it succeeds draw something with a ridiculously smooth gradient, then visually check it and hope everything worked!

(also note that even if you get a 10-bit per channel surface to work for display output, you'll have broken other things like get(), save() and all other routines that expect to be able to access 8bpc pixels, unless you specifically fix those too)

bhenry1790

Re: 30-bit "deep color"

2 years ago

Thank you davbol for the thorough information and quick reply. You confirmed my suspicions that 30-bit color is not native and beyond my capability. I wish I could figure it out and offer some kind of 30-bit library back to the community. Such high color fidelity is an interesting idea, things like ridiculously smooth gradients could be stunning.

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30-bit "deep color"

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