Migrated custom effect sample problem

@monogany wrote:

I am working with a migrated project from XNA, and one of the shaders is no longer working. It looks like the texcoords to the pixel shader always sample the same pixel, resulting in screen-sized output of just one color.

Effect/shader code (edited):

sampler SceneSampler : register(s0);

float4 PixelShaderFunction(float2 texCoord : TEXCOORD0) : COLOR0
{
	
    return float4(texCoord.x, texCoord.y, 1, 1); // test shows constant color

    // Look up the original color from the main scene.
    float3 scene = tex2D(SceneSampler, texCoord).xyz;
    return float4(scene, 1); // always the same color

}

// Compile the pixel shader for doing edge detection.
technique EdgeDetect
{
    pass P0
    {
        PixelShader = compile ps_4_0_level_9_3 PixelShaderFunction();
    }
}

Calling code:

 edgeDetect.CurrentTechnique = edgeDetect.Techniques["EdgeDetect"];

 spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Opaque);

 edgeDetect.CurrentTechnique.Passes[0].Apply();
 spriteBatch.Draw(EdgeDetectSceneRenderTarget, Vector2.Zero, Color.White);
                        
 spriteBatch.End();

Posts: 2

Participants: 1

Read full topic