// RUN: %dxc -T ps_6_0 -E main -O0

// CHECK:         [[img:%\w+]] = OpTypeImage %float 2D 2 1 0 1 Unknown
// CHECK: [[sampled_img:%\w+]] = OpTypeSampledImage [[img]]
// CHECK:    [[ptr_type:%\w+]] = OpTypePointer UniformConstant [[sampled_img]]
// CHECK:        %textureArray = OpVariable [[ptr_type]] UniformConstant

[[vk::combinedImageSampler]]
Texture2DArray textureArray : register(t1);
[[vk::combinedImageSampler]]
SamplerState samplerArray : register(s1);

struct VSOutput
{
[[vk::location(0)]] float3 Normal : NORMAL0;
[[vk::location(1)]] float3 Color : COLOR0;
[[vk::location(2)]] float3 UV : TEXCOORD0;
[[vk::location(3)]] float3 ViewVec : TEXCOORD1;
[[vk::location(4)]] float3 LightVec : TEXCOORD2;
};

float4 main(VSOutput input) : SV_TARGET
{
	float4 color = textureArray.Sample(samplerArray, input.UV) * float4(input.Color, 1.0);
	float3 N = normalize(input.Normal);
	float3 L = normalize(input.LightVec);
	float3 V = normalize(input.ViewVec);
	float3 R = reflect(-L, N);
	float3 diffuse = max(dot(N, L), 0.1) * input.Color;
	float3 specular = (dot(N,L) > 0.0) ? pow(max(dot(R, V), 0.0), 16.0) * float3(0.75, 0.75, 0.75) * color.r : float3(0.0, 0.0, 0.0);
	return float4(diffuse * color.rgb + specular, 1.0);
}