HLSL: Add SampleCmp and SampleCmpLevelZero texture methods

Test/hlsl.samplecmplevelzero.offset.dx10.frag

@@ -0,0 +1,66 @@
+SamplerComparisonState g_sSamp : register(s0);
+
+uniform Texture1D <float4> g_tTex1df4 : register(t0);
+Texture1D <int4>   g_tTex1di4;
+Texture1D <uint4>  g_tTex1du4;
+
+Texture2D <float4> g_tTex2df4;
+Texture2D <int4>   g_tTex2di4;
+Texture2D <uint4>  g_tTex2du4;
+
+Texture3D <float4> g_tTex3df4;
+Texture3D <int4>   g_tTex3di4;
+Texture3D <uint4>  g_tTex3du4;
+
+TextureCube <float4> g_tTexcdf4;
+TextureCube <int4>   g_tTexcdi4;
+TextureCube <uint4>  g_tTexcdu4;
+
+Texture1DArray <float4> g_tTex1df4a;
+Texture1DArray <int4>   g_tTex1di4a;
+Texture1DArray <uint4>  g_tTex1du4a;
+
+Texture2DArray <float4> g_tTex2df4a;
+Texture2DArray <int4>   g_tTex2di4a;
+Texture2DArray <uint4>  g_tTex2du4a;
+
+TextureCubeArray <float4> g_tTexcdf4a;
+TextureCubeArray <int4>   g_tTexcdi4a;
+TextureCubeArray <uint4>  g_tTexcdu4a;
+
+struct PS_OUTPUT
+{
+    float4 Color : SV_Target0;
+    float  Depth : SV_Depth;
+};
+
+PS_OUTPUT main()
+{
+   PS_OUTPUT psout;
+
+   // 1D
+   float r01 = g_tTex1df4 . SampleCmpLevelZero(g_sSamp, 0.1, 0.75, 2);
+   float r03 = g_tTex1di4 . SampleCmpLevelZero(g_sSamp, 0.1, 0.75, 2);
+   float r05 = g_tTex1du4 . SampleCmpLevelZero(g_sSamp, 0.1, 0.75, 2);
+
+   // 2D
+   float r21 = g_tTex2df4 . SampleCmpLevelZero(g_sSamp, float2(0.1, 0.2), 0.75, int2(2,3));
+   float r23 = g_tTex2di4 . SampleCmpLevelZero(g_sSamp, float2(0.1, 0.2), 0.75, int2(2,3));
+   float r25 = g_tTex2du4 . SampleCmpLevelZero(g_sSamp, float2(0.1, 0.2), 0.75, int2(2,3));
+
+   // *** There's no SampleCmpLevelZero on 3D textures
+
+   // This page: https://msdn.microsoft.com/en-us/library/windows/desktop/bb509696(v=vs.85).aspx
+   // claims offset is supported for cube textures, but FXC does not accept it, and that does
+   // not match other methods, so it may be a documentation bug.  Those lines are commented
+   // out below.
+   // Cube
+   // float r51 = g_tTexcdf4 . SampleCmpLevelZero(g_sSamp, float3(0.1, 0.2, 0.3), 0.75, int2(2,3));
+   // float r53 = g_tTexcdi4 . SampleCmpLevelZero(g_sSamp, float3(0.1, 0.2, 0.3), 0.75, int2(2,3));
+   // float r55 = g_tTexcdu4 . SampleCmpLevelZero(g_sSamp, float3(0.1, 0.2, 0.3), 0.75, int2(2,3));
+
+   psout.Color = 1.0;
+   psout.Depth = 1.0;
+
+   return psout;
+}