Refactored deferred lights code, and skipping SSAA when sample count is 1

CodeWalker.Shaders/PPSSAAPS.hlsl

@@ -0,0 +1,41 @@
+
+struct VS_Output
+{
+    float4 Pos : SV_POSITION;
+    float2 Tex : TEXCOORD0;
+};
+
+
+Texture2D<float4> SceneColour : register(t0);
+SamplerState PointSampler : register(s0);
+
+
+cbuffer cbPS : register(b0)
+{
+    uint SampleCount;
+    float SampleMult;
+    float TexelSizeX;
+    float TexelSizeY;
+};
+
+float4 main(VS_Output input) : SV_TARGET
+{
+    float4 vColor = 0;
+    
+    float2 ts = float2(TexelSizeX, TexelSizeY);
+    float2 tc = input.Tex * (1.0 - (ts * (float) (SampleCount - 1)));
+    
+    for (uint x = 0; x < SampleCount; x++)
+    {
+        for (uint y = 0; y < SampleCount; y++)
+        {
+            float2 tcxy = tc + float2(x, y) * ts;
+            vColor += SceneColour.Sample(PointSampler, tcxy);
+        }
+    }
+    
+    vColor *= SampleMult;
+    
+    return float4(vColor.rgb, 1);
+}
+