From 52c97db9a4101d2671d19df6bbea27148a8eded7 Mon Sep 17 00:00:00 2001
From: Sascha Willems <webmaster@saschawillems.de>
Date: Thu, 1 May 2025 11:39:42 +0200
Subject: [PATCH] Add slang shader for dynamic rendering sample

---
 shaders/slang/dynamicrendering/texture.slang | 65 ++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 shaders/slang/dynamicrendering/texture.slang

diff --git a/shaders/slang/dynamicrendering/texture.slang b/shaders/slang/dynamicrendering/texture.slang
new file mode 100644
index 00000000..baed6d6d
--- /dev/null
+++ b/shaders/slang/dynamicrendering/texture.slang
@@ -0,0 +1,65 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+struct VSInput
+{
+	float3 Pos;
+	float3 Normal;
+	float2 UV;
+};
+
+struct VSOutput
+{
+	float4 Pos : SV_POSITION;
+	float2 UV;
+	float3 Normal;
+	float3 ViewVec;
+	float3 LightVec;
+};
+
+struct UBO
+{
+    float4x4 projection;
+    float4x4 model;
+    float4 viewPos;
+};
+ConstantBuffer<UBO> ubo;
+
+[[vk::binding(0, 1)]] Sampler2D samplerColor;
+
+[shader("vertex")]
+VSOutput vertexMain(VSInput input)
+{
+	VSOutput output;
+	output.UV = input.UV;
+
+	float3 worldPos = mul(ubo.model, float4(input.Pos, 1.0)).xyz;
+
+	output.Pos = mul(ubo.projection, mul(ubo.model, float4(input.Pos.xyz, 1.0)));
+
+    float4 pos = mul(ubo.model, float4(input.Pos, 1.0));
+	output.Normal = mul((float3x3)ubo.model, input.Normal);
+	float3 lightPos = float3(0.0, 0.0, 0.0);
+	float3 lPos = mul((float3x3)ubo.model, lightPos.xyz);
+    output.LightVec = lPos - pos.xyz;
+    output.ViewVec = ubo.viewPos.xyz - pos.xyz;
+	return output;
+}
+
+[shader("fragment")]
+float4 fragmentMain(VSOutput input)
+{
+    float4 color = samplerColor.Sample(input.UV);
+
+    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) * float3(1.0, 1.0, 1.0);
+    float specular = pow(max(dot(R, V), 0.0), 16.0) * color.a;
+
+    return float4(diffuse * color.rgb + specular, 1.0);
+}
\ No newline at end of file