Cycles: use SPDX license headers

* Replace license text in headers with SPDX identifiers.
* Remove specific license info from outdated readme.txt, instead leave details
  to the source files.
* Add list of SPDX license identifiers used, and corresponding license texts.
* Update copyright dates while we're at it.

Ref D14069, T95597

9 files changed, 17 insertions, 121 deletions

diff --git a/intern/cycles/app/CMakeLists.txt b/intern/cycles/app/CMakeLists.txt
index ad2df29bc11..75ff7114dd7 100644
--- a/intern/cycles/app/CMakeLists.txt
+++ b/intern/cycles/app/CMakeLists.txt
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
-# Copyright 2011-2020 Blender Foundation
+# Copyright 2011-2022 Blender Foundation
 
 #####################################################################
 # Cycles standalone executable
diff --git a/intern/cycles/app/cycles_cubin_cc.cpp b/intern/cycles/app/cycles_cubin_cc.cpp
index e5d256dd113..3b57dd83a5c 100644
--- a/intern/cycles/app/cycles_cubin_cc.cpp
+++ b/intern/cycles/app/cycles_cubin_cc.cpp
@@ -1,18 +1,5 @@
-/*
- * Copyright 2017 Blender Foundation
- *
- * 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.
- */
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2017-2022 Blender Foundation */
 
 #include <stdint.h>
 #include <stdio.h>
diff --git a/intern/cycles/app/cycles_server.cpp b/intern/cycles/app/cycles_server.cpp
index 38771b8aed8..f12a0875298 100644
--- a/intern/cycles/app/cycles_server.cpp
+++ b/intern/cycles/app/cycles_server.cpp
@@ -1,18 +1,5 @@
-/*
- * Copyright 2011-2013 Blender Foundation
- *
- * 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.
- */
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
 
 #include <stdio.h>
 
diff --git a/intern/cycles/app/cycles_standalone.cpp b/intern/cycles/app/cycles_standalone.cpp
index 7123edbef64..0e425ac3d8f 100644
--- a/intern/cycles/app/cycles_standalone.cpp
+++ b/intern/cycles/app/cycles_standalone.cpp
@@ -1,18 +1,5 @@
-/*
- * Copyright 2011-2013 Blender Foundation
- *
- * 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.
- */
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
 
 #include <stdio.h>
 
diff --git a/intern/cycles/app/cycles_xml.cpp b/intern/cycles/app/cycles_xml.cpp
index 6144d2c60a9..50a983022a3 100644
--- a/intern/cycles/app/cycles_xml.cpp
+++ b/intern/cycles/app/cycles_xml.cpp
@@ -1,18 +1,5 @@
-/*
- * Copyright 2011-2013 Blender Foundation
- *
- * 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.
- */
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
 
 #include <stdio.h>
 
diff --git a/intern/cycles/app/cycles_xml.h b/intern/cycles/app/cycles_xml.h
index 6a48980d8ea..8ddfdaddefd 100644
--- a/intern/cycles/app/cycles_xml.h
+++ b/intern/cycles/app/cycles_xml.h
@@ -1,18 +1,5 @@
-/*
- * Copyright 2011-2013 Blender Foundation
- *
- * 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.
- */
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
 
 #ifndef __CYCLES_XML_H__
 #define __CYCLES_XML_H__
diff --git a/intern/cycles/app/io_export_cycles_xml.py b/intern/cycles/app/io_export_cycles_xml.py
index d2c6dc493e8..0009995653e 100644
--- a/intern/cycles/app/io_export_cycles_xml.py
+++ b/intern/cycles/app/io_export_cycles_xml.py
@@ -1,18 +1,5 @@
-#
-# Copyright 2011-2013 Blender Foundation
-#
-# 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.
-#
+# SPDX-License-Identifier: Apache-2.0
+# Copyright 2011-2022 Blender Foundation
 
 # XML exporter for generating test files, not intended for end users
 
diff --git a/intern/cycles/app/oiio_output_driver.cpp b/intern/cycles/app/oiio_output_driver.cpp
index d791c89772f..477465c880b 100644
--- a/intern/cycles/app/oiio_output_driver.cpp
+++ b/intern/cycles/app/oiio_output_driver.cpp
@@ -1,18 +1,5 @@
-/*
- * Copyright 2021 Blender Foundation
- *
- * 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.
- */
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021-2022 Blender Foundation */
 
 #include "app/oiio_output_driver.h"
 
diff --git a/intern/cycles/app/oiio_output_driver.h b/intern/cycles/app/oiio_output_driver.h
index a5c88e0e890..5b3df88b414 100644
--- a/intern/cycles/app/oiio_output_driver.h
+++ b/intern/cycles/app/oiio_output_driver.h
@@ -1,18 +1,5 @@
-/*
- * Copyright 2021 Blender Foundation
- *
- * 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.
- */
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2021-2022 Blender Foundation */
 
 #include "session/output_driver.h"