Add slang shaders for additional samples

shaders/slang/inputattachments/attachmentread.slang

@@ -0,0 +1,52 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+};
+
+[[vk::input_attachment_index(0)]] [[vk::binding(0)]] SubpassInput inputColor;
+[[vk::input_attachment_index(1)]] [[vk::binding(1)]] SubpassInput inputDepth;
+
+struct UBO  {
+	float2 brightnessContrast;
+	float2 range;
+	int attachmentIndex;
+};
+ConstantBuffer<UBO> ubo;
+
+float3 brightnessContrast(float3 color, float brightness, float contrast) {
+	return (color - 0.5) * contrast + 0.5 + brightness;
+}
+
+[shader("vertex")]
+VSOutput vertexMain(uint VertexIndex: SV_VertexID)
+{
+    VSOutput output;
+    output.Pos = float4(float2((VertexIndex << 1) & 2, VertexIndex & 2) * 2.0f - 1.0f, 0.0f, 1.0f);
+    return output;
+}
+
+[shader("fragment")]
+float4 fragmentMain()
+{
+    // Apply brightness and contrast filer to color input
+    if (ubo.attachmentIndex == 0) {
+        // Read color from previous color input attachment
+        float3 color = inputColor.SubpassLoad().rgb;
+        return float4(brightnessContrast(color, ubo.brightnessContrast[0], ubo.brightnessContrast[1]), 1.0);
+    }
+
+    // Visualize depth input range
+    if (ubo.attachmentIndex == 1) {
+        // Read depth from previous depth input attachment
+        float depth = inputDepth.SubpassLoad().r;
+        return float4((depth - ubo.range[0]) * 1.0 / (ubo.range[1] - ubo.range[0]).xxx, 1.0);
+    }
+
+    return float4(1.0);
+}