Add HLSL shaders for glftscene sample

data/hlsl/README.md

@@ -33,7 +33,7 @@ Shaders written to mirror the GLSL versions at `eddd724`. There have been change
 | dynamicuniformbuffer       | ☑           | ☑           | ☑           | ☑
 | gears                      | ☑           | ☑           | ☑           | ☑
 | geometryshader             | ☑           | ☑           | ☑           | ☑
-| gltfscene                  | -                 | -                 | ☑           | ❌
+| gltfscene                  | -                 | -                 | ☑           | ☑
 | hdr                        | ☑           | ❌          | ☑           | ❌
 | imgui                      | ☑           | ☑           | ☑           | ☑
 | indirectdraw               | ☑           | ☑           | ☑           | ☑

data/hlsl/gltfscene/mesh.frag

@@ -0,0 +1,26 @@
+// Copyright 2020 Google LLC
+
+Texture2D textureColorMap : register(t0, space1);
+SamplerState samplerColorMap : register(s0, space1);
+
+struct VSOutput
+{
+[[vk::location(0)]] float3 Normal : NORMAL0;
+[[vk::location(1)]] float3 Color : COLOR0;
+[[vk::location(2)]] float2 UV : TEXCOORD0;
+[[vk::location(3)]] float3 ViewVec : TEXCOORD1;
+[[vk::location(4)]] float3 LightVec : TEXCOORD2;
+};
+
+float4 main(VSOutput input) : SV_TARGET
+{
+	float4 color = textureColorMap.Sample(samplerColorMap, 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), 0.0) * input.Color;
+	float3 specular = pow(max(dot(R, V), 0.0), 16.0) * float3(0.75, 0.75, 0.75);
+	return float4(diffuse * color.rgb + specular, 1.0);
+}

data/hlsl/gltfscene/mesh.vert

@@ -0,0 +1,49 @@
+// Copyright 2020 Google LLC
+
+struct VSInput
+{
+[[vk::location(0)]] float3 Pos : POSITION0;
+[[vk::location(1)]] float3 Normal : NORMAL0;
+[[vk::location(2)]] float2 UV : TEXCOORD0;
+[[vk::location(3)]] float3 Color : COLOR0;
+};
+
+struct UBO
+{
+	float4x4 projection;
+	float4x4 view;
+	float4 lightPos;
+};
+
+cbuffer ubo : register(b0) { UBO ubo; }
+
+struct PushConsts {
+	float4x4 model;
+};
+[[vk::push_constant]] PushConsts primitive;
+
+struct VSOutput
+{
+	float4 Pos : SV_POSITION;
+[[vk::location(0)]] float3 Normal : NORMAL0;
+[[vk::location(1)]] float3 Color : COLOR0;
+[[vk::location(2)]] float2 UV : TEXCOORD0;
+[[vk::location(3)]] float3 ViewVec : TEXCOORD1;
+[[vk::location(4)]] float3 LightVec : TEXCOORD2;
+};
+
+VSOutput main(VSInput input)
+{
+	VSOutput output = (VSOutput)0;
+	output.Normal = input.Normal;
+	output.Color = input.Color;
+	output.UV = input.UV;
+	output.Pos = mul(ubo.projection, mul(ubo.view, mul(primitive.model, float4(input.Pos.xyz, 1.0))));
+
+	float4 pos = mul(ubo.view, float4(input.Pos, 1.0));
+	output.Normal = mul((float3x3)ubo.view, input.Normal);
+	float3 lPos = mul((float3x3)ubo.view, ubo.lightPos.xyz);
+	output.LightVec = lPos - pos.xyz;
+	output.ViewVec = -pos.xyz;
+	return output;
+}