Clarify licenses

- add license headers to everything
- convert a few files from public domain or LGPL2.1+ to GPL2+
- some archaeology to clarify which files are from which library

19 files changed, 97 insertions, 19 deletions

diff --git a/src/libnrtype/CMakeLists.txt b/src/libnrtype/CMakeLists.txt
index 3061e9304..42ff9d2ca 100644
--- a/src/libnrtype/CMakeLists.txt
+++ b/src/libnrtype/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 set(nrtype_SRC
 	FontFactory.cpp
diff --git a/src/libnrtype/FontFactory.cpp b/src/libnrtype/FontFactory.cpp
index 74b68fc3f..27f8b57d0 100644
--- a/src/libnrtype/FontFactory.cpp
+++ b/src/libnrtype/FontFactory.cpp
@@ -1,11 +1,13 @@
-/*
- *  FontFactory.cpp
- *  testICU
- *
- *   Authors:
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors:
  *     fred
  *     bulia byak <buliabyak@users.sf.net>
  *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/src/libnrtype/FontFactory.h b/src/libnrtype/FontFactory.h
index 085410169..547b8aa83 100644
--- a/src/libnrtype/FontFactory.h
+++ b/src/libnrtype/FontFactory.h
@@ -1,3 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
 /*
  *  FontFactory.h
  *  testICU
diff --git a/src/libnrtype/FontInstance.cpp b/src/libnrtype/FontInstance.cpp
index 7358deac0..c2abfb3f2 100644
--- a/src/libnrtype/FontInstance.cpp
+++ b/src/libnrtype/FontInstance.cpp
@@ -1,11 +1,13 @@
-/*
- *  FontInstance.cpp
- *  testICU
- *
- *   Authors:
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors:
  *     fred
  *     bulia byak <buliabyak@users.sf.net>
  *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/src/libnrtype/Layout-TNG-Compute.cpp b/src/libnrtype/Layout-TNG-Compute.cpp
index e9cf22e31..54780b5fc 100644
--- a/src/libnrtype/Layout-TNG-Compute.cpp
+++ b/src/libnrtype/Layout-TNG-Compute.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout::Calculator - text layout engine meaty bits
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 #include "Layout-TNG.h"
 #include "style.h"
diff --git a/src/libnrtype/Layout-TNG-Input.cpp b/src/libnrtype/Layout-TNG-Input.cpp
index cdaee3ad8..a20fdde53 100644
--- a/src/libnrtype/Layout-TNG-Input.cpp
+++ b/src/libnrtype/Layout-TNG-Input.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout - text layout engine input functions
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/src/libnrtype/Layout-TNG-OutIter.cpp b/src/libnrtype/Layout-TNG-OutIter.cpp
index e28c9b168..d565bb923 100644
--- a/src/libnrtype/Layout-TNG-OutIter.cpp
+++ b/src/libnrtype/Layout-TNG-OutIter.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout - text layout engine output functions using iterators
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 #include "Layout-TNG.h"
 #include "livarot/Path.h"
diff --git a/src/libnrtype/Layout-TNG-Output.cpp b/src/libnrtype/Layout-TNG-Output.cpp
index 81710b471..014c2c521 100644
--- a/src/libnrtype/Layout-TNG-Output.cpp
+++ b/src/libnrtype/Layout-TNG-Output.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout - text layout engine output functions
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/src/libnrtype/Layout-TNG-Scanline-Maker.h b/src/libnrtype/Layout-TNG-Scanline-Maker.h
index dea9aa3c5..c8c823249 100644
--- a/src/libnrtype/Layout-TNG-Scanline-Maker.h
+++ b/src/libnrtype/Layout-TNG-Scanline-Maker.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout::ScanlineMaker - text layout engine shape measurers
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 #ifndef __LAYOUT_TNG_SCANLINE_MAKER_H__
 #define __LAYOUT_TNG_SCANLINE_MAKER_H__
diff --git a/src/libnrtype/Layout-TNG-Scanline-Makers.cpp b/src/libnrtype/Layout-TNG-Scanline-Makers.cpp
index 78b805003..8398bf145 100644
--- a/src/libnrtype/Layout-TNG-Scanline-Makers.cpp
+++ b/src/libnrtype/Layout-TNG-Scanline-Makers.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout::ScanlineMaker - text layout engine shape measurers
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 #include "Layout-TNG-Scanline-Maker.h"
 #include "livarot/Shape.h"
diff --git a/src/libnrtype/Layout-TNG.cpp b/src/libnrtype/Layout-TNG.cpp
index a9e70a74b..e937e9da9 100644
--- a/src/libnrtype/Layout-TNG.cpp
+++ b/src/libnrtype/Layout-TNG.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout - text layout engine misc
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 #include "Layout-TNG.h"
 
diff --git a/src/libnrtype/Layout-TNG.h b/src/libnrtype/Layout-TNG.h
index 6c68ae913..e5317b501 100644
--- a/src/libnrtype/Layout-TNG.h
+++ b/src/libnrtype/Layout-TNG.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Inkscape::Text::Layout - text layout engine
  *
@@ -6,7 +7,7 @@
  *
  * Copyright (C) 2005 Richard Hughes
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 #ifndef __LAYOUT_TNG_H__
 #define __LAYOUT_TNG_H__
diff --git a/src/libnrtype/OpenTypeUtil.cpp b/src/libnrtype/OpenTypeUtil.cpp
index 25e4f7094..08cec5468 100644
--- a/src/libnrtype/OpenTypeUtil.cpp
+++ b/src/libnrtype/OpenTypeUtil.cpp
@@ -1,3 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
 
 #ifndef USE_PANGO_WIN32
 
diff --git a/src/libnrtype/OpenTypeUtil.h b/src/libnrtype/OpenTypeUtil.h
index ef32e76f3..5c8ca7d80 100644
--- a/src/libnrtype/OpenTypeUtil.h
+++ b/src/libnrtype/OpenTypeUtil.h
@@ -1,3 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
 
 #ifndef SEEN_OPENTYPEUTIL_H
 #define SEEN_OPENTYPEUTIL_H
diff --git a/src/libnrtype/font-glyph.h b/src/libnrtype/font-glyph.h
index 3f136daaf..5dcb93321 100644
--- a/src/libnrtype/font-glyph.h
+++ b/src/libnrtype/font-glyph.h
@@ -1,3 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2011 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
 #ifndef SEEN_LIBNRTYPE_FONT_GLYPH_H
 #define SEEN_LIBNRTYPE_FONT_GLYPH_H
 
diff --git a/src/libnrtype/font-instance.h b/src/libnrtype/font-instance.h
index 0834ace04..1dd77dfb2 100644
--- a/src/libnrtype/font-instance.h
+++ b/src/libnrtype/font-instance.h
@@ -1,3 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
 #ifndef SEEN_LIBNRTYPE_FONT_INSTANCE_H
 #define SEEN_LIBNRTYPE_FONT_INSTANCE_H
 
diff --git a/src/libnrtype/font-lister.cpp b/src/libnrtype/font-lister.cpp
index 3cd97fa8e..739b0b14b 100644
--- a/src/libnrtype/font-lister.cpp
+++ b/src/libnrtype/font-lister.cpp
@@ -1,3 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
 #include <glibmm/markup.h>
 #include <glibmm/regex.h>
 
diff --git a/src/libnrtype/font-lister.h b/src/libnrtype/font-lister.h
index 358340c76..16c34d94c 100644
--- a/src/libnrtype/font-lister.h
+++ b/src/libnrtype/font-lister.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 #ifndef FONT_LISTER_H
 #define FONT_LISTER_H
 
@@ -13,7 +14,7 @@
  * Copyright (C) 2002 Lauris Kaplinski
  * Copyright (C) 2013 Tavmjong Bah
  *
- * Released under GNU GPL, read the file 'COPYING' for more information
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  */
 
 #include <map>
diff --git a/src/libnrtype/font-style.h b/src/libnrtype/font-style.h
index 1ed82e89c..23a26d60f 100644
--- a/src/libnrtype/font-style.h
+++ b/src/libnrtype/font-style.h
@@ -1,3 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
 #ifndef SEEN_LIBNRTYPE_FONT_STYLE_H
 #define SEEN_LIBNRTYPE_FONT_STYLE_H