public void Draw(RenderDrawContext context, float sigmaRatio, Texture inputTexture, Texture outputTexture)
{
// Check if we need to regenerate offsetsWeights
if (offsetsWeights == null || this.sigmaRatio != sigmaRatio)
{
offsetsWeights = GaussianUtil.Calculate1D(Radius, sigmaRatio);
// Update parameters
blurH.Parameters.Set(GaussianBlurShaderKeys.OffsetsWeights, offsetsWeights);
blurV.Parameters.Set(GaussianBlurShaderKeys.OffsetsWeights, offsetsWeights);
this.sigmaRatio = sigmaRatio;
}
// Get a temporary texture for the intermediate pass
// This texture will be allocated only in the scope of this draw and returned to the pool at the exit of this method
var desc = inputTexture.Description;
desc.MultisampleCount = MultisampleCount.None; // TODO we should have a method to get a non-multisampled RT
var outputTextureH = gaussianBlur.NewScopedRenderTarget2D(desc);
// Horizontal pass
blurH.SetInput(inputTexture);
blurH.SetOutput(outputTextureH);
blurH.Draw(context, nameGaussianBlurH);
// Vertical pass
blurV.SetInput(outputTextureH);
blurV.SetOutput(outputTexture);
blurV.Draw(context, nameGaussianBlurV);
}