title: HLSL Compiler error?
body: <pre><code>float4x4 matInvViewProj;
  
  float4 GetPointPosition(float2 Tex0)
  {
      float4 PosImageSpace;
      PosImageSpace.xy = float2(Tex0*2-1);
      PosImageSpace.z = tex2D(DepthTextureSampler,Tex0).r;
      return mul(PosImageSpace,matInvViewProj);
  }
  </code></pre>
  
  <p>That's a part of my pixelshader. Why is there a compiler error?
  I'm compiling it in <code>ps_3_0.</code>
  Without the <code>mul()</code> it compiles.</p>