Add texture sampling HLSL test

reference/shaders-hlsl/frag/tex-sampling.frag

@@ -0,0 +1,50 @@
+Texture2D<float4> tex;
+SamplerState _tex_sampler;
+
+static float2 texCoord;
+static float4 FragColor;
+
+struct SPIRV_Cross_Input
+{
+    float2 texCoord : TEXCOORD0;
+};
+
+struct SPIRV_Cross_Output
+{
+    float4 FragColor : SV_Target0;
+};
+
+float SPIRV_Cross_projectTextureCoordinate(float2 coord)
+{
+    return coord.x / coord.y;
+}
+
+float2 SPIRV_Cross_projectTextureCoordinate(float3 coord)
+{
+    return float2(coord.x, coord.y) / coord.z;
+}
+
+float3 SPIRV_Cross_projectTextureCoordinate(float4 coord)
+{
+    return float3(coord.x, coord.y, coord.z) / coord.w;
+}
+
+void frag_main()
+{
+    float4 texcolor = tex.Sample(_tex_sampler, texCoord);
+    texcolor += tex.Sample(_tex_sampler, texCoord, int2(1, 2));
+    texcolor += tex.SampleLevel(_tex_sampler, texCoord, 2.0f);
+    texcolor += tex.SampleGrad(_tex_sampler, texCoord, float2(1.0f, 2.0f), float2(3.0f, 4.0f));
+    texcolor += tex.Sample(_tex_sampler, SPIRV_Cross_projectTextureCoordinate(float3(texCoord, 2.0f)));
+    texcolor += tex.SampleBias(_tex_sampler, texCoord, 1.0f);
+    FragColor = texcolor;
+}
+
+SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
+{
+    texCoord = stage_input.texCoord;
+    frag_main();
+    SPIRV_Cross_Output stage_output;
+    stage_output.FragColor = FragColor;
+    return stage_output;
+}

shaders-hlsl/frag/tex-sampling.frag

@@ -0,0 +1,16 @@
+#version 450
+
+uniform sampler2D tex;
+in vec2 texCoord;
+
+out vec4 FragColor;
+
+void main() {
+	vec4 texcolor = texture(tex, texCoord);
+	texcolor += textureOffset(tex, texCoord, ivec2(1, 2));
+	texcolor += textureLod(tex, texCoord, 2);
+	texcolor += textureGrad(tex, texCoord, vec2(1.0, 2.0), vec2(3.0, 4.0));
+	texcolor += textureProj(tex, vec3(texCoord, 2.0));
+	texcolor += texture(tex, texCoord, 1.0);
+	FragColor = texcolor;
+}