Add slang shader for deferred rendering sample

shaders/slang/deferred/mrt.slang

@@ -0,0 +1,83 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+[[vk::binding(1, 0)]] Sampler2D samplerColor;
+[[vk::binding(2, 0)]] Sampler2D samplerNormalMap;
+
+struct VSInput
+{
+    float4 Pos;
+    float2 UV;
+    float3 Color;
+    float3 Normal;
+    float3 Tangent;
+};
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+    float3 Normal;
+    float2 UV;
+    float3 Color;
+    float3 WorldPos;
+    float3 Tangent;
+};
+
+struct FSOutput
+{
+	float4 Position;
+	float4 Normal;
+	float4 Albedo;
+};
+
+struct UBO
+{
+    float4x4 projection;
+    float4x4 model;
+    float4x4 view;
+    float4 instancePos[3];
+};
+[[vk::binding(0, 0)]] ConstantBuffer<UBO> ubo;
+
+[shader("vertex")]
+VSOutput vertexMain(VSInput input, uint InstanceIndex: SV_InstanceID)
+{
+    VSOutput output;
+    float4 tmpPos = input.Pos + ubo.instancePos[InstanceIndex];
+
+    output.Pos = mul(ubo.projection, mul(ubo.view, mul(ubo.model, tmpPos)));
+
+    output.UV = input.UV;
+
+    // Vertex position in world space
+    output.WorldPos = mul(ubo.model, tmpPos).xyz;
+
+    // Normal in world space
+    output.Normal = normalize(input.Normal);
+    output.Tangent = normalize(input.Tangent);
+
+    // Currently just vertex color
+    output.Color = input.Color;
+    return output;
+}
+
+[shader("fragment")]
+FSOutput fragmentMain(VSOutput input)
+{
+	FSOutput output;
+	output.Position = float4(input.WorldPos, 1.0);
+
+	// Calculate normal in tangent space
+	float3 N = normalize(input.Normal);
+	float3 T = normalize(input.Tangent);
+	float3 B = cross(N, T);
+	float3x3 TBN = float3x3(T, B, N);
+	float3 tnorm = mul(normalize(samplerNormalMap.Sample(input.UV).xyz * 2.0 - float3(1.0, 1.0, 1.0)), TBN);
+	output.Normal = float4(tnorm, 1.0);
+
+	output.Albedo = samplerColor.Sample(input.UV);
+	return output;
+}