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shaders/timeline_semaphore/game_of_life_mutate.comp

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+/* Copyright (c) 2021, Arm Limited and Contributors
+ *
+ * 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.
+ */
+#version 450
+layout(local_size_x = 8, local_size_y = 8) in;
+
+layout(rgba8, set = 0, binding = 0) writeonly uniform image2D ImageOutput;
+layout(set = 1, binding = 0) uniform sampler2D ImageInput;
+
+layout(push_constant) uniform Registers
+{
+    float counter;
+} registers;
+
+void main()
+{
+    vec4 v = texelFetch(ImageInput, ivec2(gl_GlobalInvocationID.xy), 0);
+
+    // Increase intensity over time until the cell dies.
+    if (any(notEqual(v.rgb, vec3(0.0))))
+        v.w = max(v.w, registers.counter);
+    else
+        v.w = 0.0;
+
+    imageStore(ImageOutput, ivec2(gl_GlobalInvocationID.xy), v);
+}