init

shaders/oit_depth_peeling/gather.frag

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+#version 450
+/* Copyright (c) 2024, Google
+ *
+ * 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.
+ */
+
+layout (location = 0) in vec4 inColor;
+
+layout (location = 0) out vec4 outFragColor;
+
+////////////////////////////////////////
+
+layout(set = 0, binding = 1) uniform sampler2D depthTex;
+
+////////////////////////////////////////
+
+void main()
+{
+	// 'depthTex' contains the depth information of the previous layer.
+	// That information is used to discard any fragment that belongs to
+	// a layer that has already be rendered (i.e. a layer further in front).
+	const float layerDepth = texelFetch(depthTex, ivec2(gl_FragCoord.xy), 0).r;
+	if(gl_FragCoord.z >= layerDepth)
+	{
+		// NOTE
+		// Remember that a reversed Z-buffer is used here.
+		// Fragments closer to the camera have a higher z coordinate.
+		discard;
+	}
+
+	outFragColor = inColor;
+}
+