[vtkusers] Increase color depth for volumic rendering

[Gregory Zaccaro]

Hi Dear VTK users,


I've been working for several days on :

- Doing volumic rendering with VTK

- Export the render window to an image


I'm able to do that but I would like to increase the number of bits per pixels (bpp).


Currently, I use a vtkWindowToImageFilter combined with a vtkTIFFWriter to export the image of a vtkWin32OpenGLRenderWindow.


I found that the method vtkWin32OpenGLRenderWindow ::SetupPixelFormatPaletteAndContext() let me specify the desired bpp.

I managed to go up to 32 bpp without any warning/error but it has no effect on the rendered results and the exported image, the image always has 24 bit depth RGB, 8 bits per channel.

I attached the code I use to achieve that.


My question is : is it possible to have a render window with 10, 16 or more bits per color per pixel ?


My system :

VTK 8.0.0 built from source


Graphics card : AMD Radeon R9 Fury X. Display settings supports 10 bits per channel


Cheers,
Gregory Zaccaro.
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