Add QNanoPainter as a submodule and add it to the build script.

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "noisicaa/node_lib/swh/src"]
 	path = noisicaa/node_lib/swh/src
 	url = https://github.com/swh/ladspa
+[submodule "3rdparty/qnanopainter"]
+	path = 3rdparty/qnanopainter
+	url = https://github.com/QUItCoding/qnanopainter

3rdparty/README.md

@@ -0,0 +1,5 @@
+Some of the more obscure packages, which are not available generally available in distributions.
+
+* qlnanopainter: Library for implementing OpenGL accelerated Qt5 C++ UI components.
+  - Source: https://github.com/QUItCoding/qnanopainter
+  - License: zlib

3rdparty/qnanopainter

@@ -0,0 +1 @@
+Subproject commit 963870484151ebe6ca9225e0e73588abb7e564e0

3rdparty/wscript

@@ -0,0 +1,84 @@
+# @begin:license
+#
+# Copyright (c) 2015-2021, Ben Niemann <pink@odahoda.de>
+#
+# 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:license
+
+import os.path
+
+def configure(ctx):
+    ctx.env['LIB_QNANOPAINTER'] = 'qnanopainter'
+    ctx.env['LIBPATH_QNANOPAINTER'] = os.path.join(ctx.bldnode.abspath(), '3rdparty')
+    if not ctx.options.release:
+        ctx.env['RPATH_QNANOPAINTER'] = os.path.join(ctx.bldnode.abspath(), '3rdparty')
+    ctx.env['INCLUDES_QNANOPAINTER'] = os.path.join(ctx.srcnode.abspath(), '3rdparty/qnanopainter/libqnanopainter')
+    ctx.env['DEFINES_QNANOPAINTER'] = [
+        'QNANO_QT_GL_INCLUDE=1',
+        'QNANO_BUILD_GL_BACKENDS=1',
+        'QNANO_USE_RENDERNODE=1',
+    ]
+
+def build(ctx):
+    ctx.shlib(
+        target='qnanopainter',
+        features='qt5 cxx cxxshlib',
+        source=[
+            'qnanopainter/libqnanopainter/nanovg/nanovg.c',
+            'qnanopainter/libqnanopainter/libqnanopainterdata.qrc',
+            'qnanopainter/libqnanopainter/qnanopainter.cpp',
+            'qnanopainter/libqnanopainter/qnanocolor.cpp',
+            'qnanopainter/libqnanopainter/qnanolineargradient.cpp',
+            'qnanopainter/libqnanopainter/qnanoimagepattern.cpp',
+            'qnanopainter/libqnanopainter/qnanoimage.cpp',
+            'qnanopainter/libqnanopainter/qnanofont.cpp',
+            'qnanopainter/libqnanopainter/qnanoradialgradient.cpp',
+            'qnanopainter/libqnanopainter/qnanoboxgradient.cpp',
+            'qnanopainter/libqnanopainter/qnanowindow.cpp',
+            'qnanopainter/libqnanopainter/private/qnanodebug.cpp',
+            'qnanopainter/libqnanopainter/qnanoquickitem.cpp',
+            'qnanopainter/libqnanopainter/qnanoquickitempainter.cpp',
+            'qnanopainter/libqnanopainter/private/qnanobackendgl2.cpp',
+            'qnanopainter/libqnanopainter/private/qnanobackendgl3.cpp',
+        ],
+        moc=[
+            'qnanopainter/libqnanopainter/nanovg/nanovg.h',
+            'qnanopainter/libqnanopainter/private/qnanobrush.h',
+            'qnanopainter/libqnanopainter/qnanopainter.h',
+            'qnanopainter/libqnanopainter/qnanocolor.h',
+            'qnanopainter/libqnanopainter/qnanolineargradient.h',
+            'qnanopainter/libqnanopainter/qnanoimagepattern.h',
+            'qnanopainter/libqnanopainter/qnanoimage.h',
+            'qnanopainter/libqnanopainter/qnanofont.h',
+            'qnanopainter/libqnanopainter/qnanoradialgradient.h',
+            'qnanopainter/libqnanopainter/qnanoboxgradient.h',
+            'qnanopainter/libqnanopainter/private/qnanodataelement.h',
+            'qnanopainter/libqnanopainter/private/qnanobackend.h',
+            'qnanopainter/libqnanopainter/private/qnanobackendfactory.h',
+            'qnanopainter/libqnanopainter/qnanowindow.h',
+            'qnanopainter/libqnanopainter/private/qnanodebug.h',
+            'qnanopainter/libqnanopainter/qnanoquickitem.h',
+            'qnanopainter/libqnanopainter/qnanoquickitempainter.h',
+            'qnanopainter/libqnanopainter/private/qnanobackendgl2.h',
+            'qnanopainter/libqnanopainter/private/qnanobackendgl3.h',
+        ],
+        includes=['qnanopainter/libqnanopainter/'],
+        defines=ctx.env['DEFINES_QNANOPAINTER'],
+        cxxflags=['-Wno-misleading-indentation'],
+        uselib='QT5QUICK',
+        vnum='1',
+    )
+

wscript

@@ -163,6 +163,8 @@ def configure(ctx):
     else:
         ctx.env['ENABLE_COVERAGE'] = False
 
+    ctx.recurse('3rdparty')
+
     create_config_py(ctx)
 
 
@@ -379,6 +381,7 @@ def build(ctx):
     with ctx.group(ctx.GRP_BUILD_TOOLS):
         ctx.recurse('build_utils')
 
+    ctx.recurse('3rdparty')
     ctx.recurse('bin')
     ctx.recurse('data')
     ctx.recurse('noisicaa')