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Editorial Team
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Asked: 2026-06-14T06:01:49+00:00

I’m searching for a way to read a pixels color at the mousepoint. In

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I’m searching for a way to read a pixels color at the mousepoint. In OpenGL it was done by calling the function “glReadPixels” after drawing the scene (or parts of it). I want to make a simple color picking routine in the background, for identifing a shapes / lines in 3D Space.

So, is there any equivalent method/function/suggestion for doing the same in SharpDX (DirectX10 / DirectX11) ?

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1 Answer

  1. Editorial Team

    This is perfectly possible with Direct3D11: simply follow these steps:

    • Use DeviceContext.CopySubResourceRegion to copy part from the source texture to a staging texture (size of the pixel area you want to readback, same format, but with ResourceUsage.Staging)
    • Retrieve the pixel from this staging texture using Device.Map/UnMap.

    There is plenty of discussion about this topic around the net (for example: “Reading one pixel from texture to CPU in DX11“)

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