Merge pull request #1017 from LoopDawg/texture-struct-return.1

HLSL: add methods to handle user structures in texture template type.

Test/hlsl.texture.struct.frag

@@ -0,0 +1,55 @@
+struct s1_t {
+    float  c0;
+    float2 c1;
+    float  c2;
+};
+
+struct s2_t {
+    float  c0;
+    float3 c1;
+};
+
+struct s3_t {
+    float2  c0;
+    float1  c1;
+};
+
+struct s4_t {
+    int  c0;
+    int2 c1;
+    int  c2;
+};
+
+struct s5_t {
+    uint c0;
+    uint c1;
+};
+
+SamplerState g_sSamp;
+Texture2D <s1_t>   g_tTex2s1;
+Texture2D <s2_t>   g_tTex2s2;
+Texture2D <s3_t>   g_tTex2s3;
+Texture2D <s4_t>   g_tTex2s4;
+Texture2D <s5_t>   g_tTex2s5;
+
+Texture2D <s1_t>   g_tTex2s1a; // same type as g_tTex2s1, to test fn signature matching.
+
+// function overloading to test name mangling with textures templatized on structs
+s1_t fn1(Texture2D <s1_t> t1) { return t1 . Sample(g_sSamp, float2(0.6, 0.61)); }
+s2_t fn1(Texture2D <s2_t> t2) { return t2 . Sample(g_sSamp, float2(0.6, 0.61)); }
+
+float4 main() : SV_Target0
+{
+    s1_t s1 = g_tTex2s1 . Sample(g_sSamp, float2(0.1, 0.11));
+    s2_t s2 = g_tTex2s2 . Sample(g_sSamp, float2(0.2, 0.21));
+    s3_t s3 = g_tTex2s3 . Sample(g_sSamp, float2(0.3, 0.31));
+    s4_t s4 = g_tTex2s4 . Sample(g_sSamp, float2(0.4, 0.41));
+    s5_t s5 = g_tTex2s5 . Sample(g_sSamp, float2(0.5, 0.51));
+
+    s1_t r0 = fn1(g_tTex2s1);
+    s2_t r1 = fn1(g_tTex2s2);
+    s1_t r2 = fn1(g_tTex2s1a);
+
+    return 0;
+}
+

Test/hlsl.texture.subvec4.frag

@@ -11,7 +11,7 @@ Texture2D <float4> g_tTex2df4;
 
 SamplerState g_sSamp;
 
-float4 main()
+float4 main() : SV_Target0
 {
     uint MipLevel;
     uint WidthU;