add tracy

libs/tracy/examples/ToyPathTracer/Windows/PixelShader.hlsl

@@ -0,0 +1,15 @@
+float3 LinearToSRGB(float3 rgb)
+{
+    rgb = max(rgb, float3(0, 0, 0));
+    return max(1.055 * pow(rgb, 0.416666667) - 0.055, 0.0);
+}
+
+Texture2D tex : register(t0);
+SamplerState smp : register(s0);
+
+float4 main(float2 uv : TEXCOORD0) : SV_Target
+{
+    float3 col = tex.Sample(smp, uv).rgb;
+    col = LinearToSRGB(col);
+    return float4(col, 1.0f);
+}