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mdxshadermanaged-directx

Basic samples for shader in Managed DirectX

I am new write a pixel shader and use in my managed directx project, where i can get some basic sample to start it.

Solution

  • I'm assuming you know how to create a device.

    First, you need to prepare the shader itself.

    Here's a little sample pixel shader (which uses pixel shader 1.4, as seen by ps_1_4; r0 is a register that is read as the final result; v0 is a register that stores primary colour (of diffuse lighting)):

    ps_1_4
mov r0, v0

    This shader, which is in shader assembly, has to be assembled. You can do that as follows (note that you need D3DX library referenced, otherwise you won't see the ShaderLoader class):

    Imports Microsoft.DirectX

' other code

Dim graphicsStream As GraphicsStream = Direct3D.ShaderLoader.FromString(shaderText, Nothing, Direct3D.ShaderFlags.None)

' other code.

    After assembling the shader, you can finally create a PixelShader object as follows:

    ' other code

Dim p As Direct3D.PixelShader = New Direct3D.PixelShader(Device, graphicsStream)

' other code

    To apply the pixel shader, use:

    ' other code

Device.PixelShader = p

' other code

    where Device is the Direct3D Device.

    A similar process applies for compiling shaders in case you use HLSL.

    Edit: Just noticed this was an year old question.