From 8cacf0b4e9a52646837a84547bb00179e1b4e4ec Mon Sep 17 00:00:00 2001
From: Ben Clayton <bclayton@google.com>
Date: Thu, 21 May 2020 14:51:08 +0100
Subject: [PATCH] Add HLSL shaders for multisampling sample

---
 data/hlsl/README.md                |  2 +-
 data/hlsl/multisampling/scene.frag | 26 ++++++++++++++++++
 data/hlsl/multisampling/scene.vert | 43 ++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 data/hlsl/multisampling/scene.frag
 create mode 100644 data/hlsl/multisampling/scene.vert

diff --git a/data/hlsl/README.md b/data/hlsl/README.md
index 90147f0a..8d0be9cc 100644
--- a/data/hlsl/README.md
+++ b/data/hlsl/README.md
@@ -41,7 +41,7 @@ Shaders written to mirror the GLSL versions at `eddd724`. There have been change
 | inputattachments           | &#9745;           | &#9745;           | &#9745;           | &#9745;
 | instancing                 | &#9745;           | &#9745;           | &#9745;           | &#9745;
 | mesh                       | &#9745;           | &#9745;           | &#10060;          | &#9745;
-| multisampling              | &#9745;           | &#9745;           | &#9745;           | &#10060;
+| multisampling              | &#9745;           | &#9745;           | &#9745;           | &#9745;
 | multithreading             | &#9745;           | &#9745;           | &#9745;           | &#9745;
 | multiview                  | &#9745;           | &#9745;           | &#9745;           | &#9745;
 | negativeviewportheight     | &#9745;           | &#9745;           | &#9745;           | &#9745;
diff --git a/data/hlsl/multisampling/scene.frag b/data/hlsl/multisampling/scene.frag
new file mode 100644
index 00000000..2bc0a9c2
--- /dev/null
+++ b/data/hlsl/multisampling/scene.frag
@@ -0,0 +1,26 @@
+// Copyright 2020 Google LLC
+
+Texture2D textureColorMap : register(t1);
+SamplerState samplerColorMap : register(s1);
+
+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);
+}
\ No newline at end of file
diff --git a/data/hlsl/multisampling/scene.vert b/data/hlsl/multisampling/scene.vert
new file mode 100644
index 00000000..4e5e9f4e
--- /dev/null
+++ b/data/hlsl/multisampling/scene.vert
@@ -0,0 +1,43 @@
+// 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 model;
+	float4 lightPos;
+};
+cbuffer ubo : register(b0) { UBO ubo; };
+
+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.model, float4(input.Pos.xyz, 1.0)));
+
+	float4 pos = mul(ubo.model, float4(input.Pos, 0.0));
+	output.Normal = mul((float3x3)ubo.model, input.Normal);
+	float3 lPos = mul((float3x3)ubo.model, ubo.lightPos.xyz);
+	output.LightVec = lPos - input.Pos;
+	output.ViewVec = -input.Pos;
+	return output;
+}
\ No newline at end of file