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shaders/dynamic_rendering_local_read/slang/scene_transparent.frag.slang

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+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+[[vk::input_attachment_index(0)]] SubpassInput positionDepthAttachment;
+
+[[vk::binding(2, 0)]] Sampler2D samplerTexture;
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+    float3 Color;
+    float2 UV;
+};
+
+[[SpecializationConstant]] const float NEAR_PLANE = 0.1;
+[[SpecializationConstant]] const float FAR_PLANE = 256.0;
+
+float linearDepth(float depth)
+{
+	float z = depth * 2.0f - 1.0f; 
+	return (2.0f * NEAR_PLANE * FAR_PLANE) / (FAR_PLANE + NEAR_PLANE - z * (FAR_PLANE - NEAR_PLANE));	
+}
+
+[shader("fragment")]
+float4 main(VSOutput input)
+{
+	// Sample depth from deferred depth buffer and discard if obscured
+	float depth = positionDepthAttachment.SubpassLoad().a;
+
+    // Save the sampled texture color before discarding.
+    // This is to avoid implicit derivatives in non-uniform control flow.
+    // @todo: reversed depth
+    float4 sampledColor = samplerTexture.Sample(input.UV);
+	if ((depth != 0.0) && (linearDepth(input.Pos.z) < depth))
+	{
+//		discard;
+	};
+
+	return sampledColor;
+}