File headers: SPDX License migration

Use a shorter/simpler license convention, stops the header taking so
much space.

Follow the SPDX license specification: https://spdx.org/licenses

- C/C++/objc/objc++
- Python
- Shell Scripts
- CMake, GNUmakefile

While most of the source tree has been included

- `./extern/` was left out.
- `./intern/cycles` & `./intern/atomic` are also excluded because they
  use different header conventions.

doc/license/SPDX-license-identifiers.txt has been added to list SPDX all
used identifiers.

See P2788 for the script that automated these edits.

Reviewed By: brecht, mont29, sergey

Ref D14069

9 files changed, 17 insertions, 158 deletions

diff --git a/source/blender/editors/render/CMakeLists.txt b/source/blender/editors/render/CMakeLists.txt
index 934badd3b6f..dde1f138bac 100644
--- a/source/blender/editors/render/CMakeLists.txt
+++ b/source/blender/editors/render/CMakeLists.txt
@@ -1,19 +1,4 @@
-# ***** BEGIN GPL LICENSE BLOCK *****
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-# ***** END GPL LICENSE BLOCK *****
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 set(INC
   ../include
diff --git a/source/blender/editors/render/render_intern.hh b/source/blender/editors/render/render_intern.hh
index d374717664b..fc40fb06851 100644
--- a/source/blender/editors/render/render_intern.hh
+++ b/source/blender/editors/render/render_intern.hh
@@ -1,21 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2008 Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2008 Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup edrend
diff --git a/source/blender/editors/render/render_internal.cc b/source/blender/editors/render/render_internal.cc
index d04e45e4ccb..5308d4611e7 100644
--- a/source/blender/editors/render/render_internal.cc
+++ b/source/blender/editors/render/render_internal.cc
@@ -1,21 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2008 Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2008 Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup edrend
diff --git a/source/blender/editors/render/render_opengl.cc b/source/blender/editors/render/render_opengl.cc
index fb6742c9fd5..af4003b0c14 100644
--- a/source/blender/editors/render/render_opengl.cc
+++ b/source/blender/editors/render/render_opengl.cc
@@ -1,21 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2008 Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2008 Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup render
diff --git a/source/blender/editors/render/render_ops.cc b/source/blender/editors/render/render_ops.cc
index 0f10d186e6e..1583ce44ee5 100644
--- a/source/blender/editors/render/render_ops.cc
+++ b/source/blender/editors/render/render_ops.cc
@@ -1,21 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2009 Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2009 Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup edrend
diff --git a/source/blender/editors/render/render_preview.cc b/source/blender/editors/render/render_preview.cc
index c1c75e485f7..6aaf551a88a 100644
--- a/source/blender/editors/render/render_preview.cc
+++ b/source/blender/editors/render/render_preview.cc
@@ -1,21 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup edrend
diff --git a/source/blender/editors/render/render_shading.cc b/source/blender/editors/render/render_shading.cc
index 19ab6841e22..bad4208cf19 100644
--- a/source/blender/editors/render/render_shading.cc
+++ b/source/blender/editors/render/render_shading.cc
@@ -1,20 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2009 Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2009 Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup edrend
diff --git a/source/blender/editors/render/render_update.cc b/source/blender/editors/render/render_update.cc
index b1e8e3927ef..3d26e764211 100644
--- a/source/blender/editors/render/render_update.cc
+++ b/source/blender/editors/render/render_update.cc
@@ -1,20 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2009 Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2009 Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup edrend
diff --git a/source/blender/editors/render/render_view.cc b/source/blender/editors/render/render_view.cc
index 980cd899120..a7ff2aad05a 100644
--- a/source/blender/editors/render/render_view.cc
+++ b/source/blender/editors/render/render_view.cc
@@ -1,21 +1,5 @@
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * The Original Code is Copyright (C) 2008 Blender Foundation.
- * All rights reserved.
- */
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2008 Blender Foundation. All rights reserved. */
 
 /** \file
  * \ingroup edrend