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[greenmadrid]

Summary: Looking for sample code for 10 bit color depth display

Hi, I am a beginner in graphics.

I would like to write a 10 bit color depth display program for Windows 10 64 bit application.

I referred to this page and downloaded the SDK for AMD FirePro.

http://developer.amd.com/tools-and-sdks/graphics-development/firepro-sdk/

Somehow the sample code in 'main.cpp' in the folder [samples]-[wgl-10bit] looks different to the sample codes written in the '10-bit.pdf' in [samples]-[wgl-10bit]-[doc].

I hope someone would not mind enlightening me with a sample code written in the '10-bit.pdf' or other sources available.

I tried some part of the code written in the '10-bit.pdf' but was not successful. I wrote an application which is able to draw from 0-1023 bit in grayscale, with adjustable grayscale level.

However, I was only able to display the image in 8-bit color depth. The change was onbly visible when I incremented the grayscale by 4 bit.

I am wondering whether I used the suitable color format and therefore would like to have a look of the suggested sample code.

Below is the specification which I used for my developed application.

Hardware:

CPU: Dell OptiPlex 980

Monitor: EIZO GX540 (using Display Port Interface)

Graphic Board: FirePro W4100

Software:

OS: Windows 10 Pro 64 bit

Graphic Board Driver Package Version: 15.201.2401-151104a-296716c-Retail_End_User (with 10 bit pixel format support enabled)

Open GL Version: 6.14.10.13411

Thank you in advance.

[fsadough]

Please PM me your email address

[benc · Accepted solution]

Hi,

To use 10 bits you first need to activate the feature in the driver settings.

Then you need to require a 10bits pixel format from windows

ChoosePixelFormat function (Windows)

  pfd.nSize           = sizeof(PIXELFORMATDESCRIPTOR);

  pfd.nVersion        = 1;

  pfd.dwFlags         = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL  | PFD_DOUBLEBUFFER  ;

  pfd.iPixelType      = PFD_TYPE_RGBA;

  pfd.cColorBits      = 32;

  pfd.cRedBits        = Need10Bits?10:8;

  pfd.cRedShift       = 0;

  pfd.cGreenBits      = Need10Bits?10:8;

  pfd.cGreenShift     = 0;

  pfd.cBlueBits       = Need10Bits?10:8;

  pfd.cBlueShift      = 0;

  pfd.cAlphaBits      = Need10Bits?2:8;

  pfd.cAlphaShift     = 0;

  pfd.cAccumBits      = 0;

  pfd.cAccumRedBits   = 0;

  pfd.cAccumGreenBits = 0;

  pfd.cAccumBlueBits  = 0;

  pfd.cAccumAlphaBits = 0;

  pfd.cDepthBits      = 24;

  pfd.cStencilBits    = 8;

  pfd.cAuxBuffers     = 0;

  pfd.iLayerType      = PFD_MAIN_PLANE;

  pfd.bReserved       = 0;

  pfd.dwLayerMask     = 0;

  pfd.dwVisibleMask   = 0;

  pfd.dwDamageMask    = 0;

At this stage you can check if the pixel format returned by ChoosePixelFormat is a 10 bits one.

If not it means your card doesn't support it

10 bits is only supported on FirePro (and the new RadeonPro) brand.