private void BlurAmbientMap(GraphicsCommandList cmdList, FrameResource currFrame, int blurCount)
{
cmdList.PipelineState = _ssaoBlurPso;
long ssaoCBAddress = currFrame.SsaoCB.Resource.GPUVirtualAddress;
cmdList.SetGraphicsRootConstantBufferView(0, ssaoCBAddress);
for (int i = 0; i < blurCount; i++)
{
BlurAmbientMap(cmdList, true);
BlurAmbientMap(cmdList, false);
}
}
public void ComputeSsao(GraphicsCommandList cmdList, FrameResource currFrame, int blurCount)
{
cmdList.SetViewports(_viewport);
cmdList.SetScissorRectangles(_scissorRectangle);
// We compute the initial SSAO to AmbientMap0.
// Change to RENDER_TARGET.
cmdList.ResourceBarrierTransition(_ambientMap0, ResourceStates.GenericRead, ResourceStates.RenderTarget);
cmdList.ClearRenderTargetView(_ambientMap0CpuRtv, Color.White);
// Specify the buffers we are going to render to.
cmdList.SetRenderTargets(1, _ambientMap0CpuRtv, null);
// Bind the constant buffer for this pass.
long ssaoCBAddress = currFrame.SsaoCB.Resource.GPUVirtualAddress;
cmdList.SetGraphicsRootConstantBufferView(0, ssaoCBAddress);
cmdList.SetGraphicsRoot32BitConstant(1, 0, 0);
// Bind the normal and depth maps.
cmdList.SetGraphicsRootDescriptorTable(2, _normalMapGpuSrv);
// Bind the random vector map.
cmdList.SetGraphicsRootDescriptorTable(3, _randomVectorMapGpuSrv);
cmdList.PipelineState = _ssaoPso;
// Draw fullscreen quad.
cmdList.SetVertexBuffers(0, null, 0);
cmdList.SetIndexBuffer(null);
cmdList.PrimitiveTopology = PrimitiveTopology.TriangleList;
cmdList.DrawInstanced(6, 1, 0, 0);
// Change back to GENERIC_READ so we can read the texture in a shader.
cmdList.ResourceBarrierTransition(_ambientMap0, ResourceStates.RenderTarget, ResourceStates.GenericRead);
BlurAmbientMap(cmdList, currFrame, blurCount);
}
