I just tried to install MyPaint v1.2.1-beta.0 on Windows 7 x64. Immediately after install launching the program results in an error "python2w.exe has stopped working" This is a fresh install of Windows 7 so i'm not sure if i'm missing something or if this is a genuine bug. Since the program doesn't even launch, I am not sure how to provide more info about this problem but if you'd direct me i'd be willing to help.

Hi,

I cannot launch anymore MyPaint.

MyPaint version: 1.2.0-3 Operating system: Debian SID Desktop environment: GNOME 3.22 under Wayland

Steps to reproduce

1. Start MyPaint
2. MyPaint never start

Backtraces or error messages

In a terminal, any option return this:

mypaint
INFO: mypaint: Installation layout: conventional POSIX-like structure with prefix u'/usr'
INFO: lib.i18n: POSIX: LANG='en_US.utf8'
INFO: lib.i18n: POSIX: LANGUAGE=None

** (mypaint:29940): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-JzvpLY1s8t: Connection refused
Gdk-Message: Unable to load bogosity from the cursor theme
Traceback (most recent call last):
  File "/usr/bin/mypaint", line 462, in <module>
    main.main(datapath, iconspath, old_confpath, version=version)
  File "/usr/share/mypaint/gui/main.py", line 95, in main
    from gui import application
  File "/usr/share/mypaint/gui/application.py", line 53, in <module>
    import gui.device
  File "/usr/share/mypaint/gui/device.py", line 25, in <module>
    import gui.mode
  File "/usr/share/mypaint/gui/mode.py", line 809, in <module>
    class SingleClickMode (InteractionMode):
  File "/usr/share/mypaint/gui/mode.py", line 813, in SingleClickMode
    cursor = gdk.Cursor(gdk.BOGOSITY)
  File "/usr/lib/python2.7/dist-packages/gi/overrides/Gdk.py", line 329, in __new__
    return cls.new(*args, **kwds)
TypeError: constructor returned NULL

I rebased my change from pull request #302. Unfortunately this closed #302 and I can't reopen it, so I create this new pull request.

Apart from rebasing, I changed the implementation by checking mypaint-data through pkg-config, and not using a git submodule anymore. Indeed using a git submodule, we would reinstall the mypaint-data package specially for mypaint, which goes against the very idea of having it as a separate shared package usable by other apps.

I also updated mypaint-data (https://github.com/Jehan/mypaint-data), which is now set to use the latest brush data from current mypaint repo, and it will now be installed in a proper separate directory $datadir/mypaint-data/. I have tested against my mypaint repo installed in a separate prefix and it works well. I have also already prepare the code for GIMP which is ready to be committed if and when you will accept the pull request. The discovery through pkg-config in GIMP works well as well.

The latest changes have resolved some strange problems, thanks everyone!

Now, it seems the last major hurdle is getting pressure sensitivity to work. I realize this very well could be related to Gtk/Gdk upstream, but figured I'd open it up here:

If my stylus isn't near the screen, when I launch MyPaint, pressure sensitivity works! But once I move the pen away from the screen, I loose pressure sensitivity.

Any ideas where this might be coming from? I see two devices in the preferences: System Aggregated Pointer and N-trig DuoSense device Stylus. This is under Windows 10, btw.

Thanks!

If I keep my hand away from the screen, it draws just fine, with pressure and everything (WinTab installed). However, if I touch the screen with my palm, things go haywire, and from then on (until I re-run MyPaint), they stay screwed up even with pen input. The upper left two strokes were prior to my palm touching the screen, the others are after.

I see it with both 32 and 64 bits, using the October 8, 2014 build from http://opensourcepack.blogspot.fr/2013/01/mypaint-and-pygi.html. I don't have this problem in MyPaint 1.0, however.

Any ideas?

Thanks!

Description of the problem

Building mypaint 2.0.1 either within the ebuild packaged for Gentoo or the original release tarball will result in a crash (core dumped) with a numpy assertion.

Running installed mypaint

The canvas appears. When drawing a stroke with the default tool, it (slowly) appears then crashes with the same error.

Running demo

The demo shows the same behaviour as the installed mypaint.

Running tests

They fail with the same assertion but no user interaction is required.

Basic system details

MyPaint version: 2.0.1 Operating system: Gentoo Linux (downstream bug) Desktop environment: KDE Plasma 5.19.5 General system information: see here

Steps to reproduce

1. Start MyPaint
2. Draw a brush stroke (or run tests)
3. Crashes

Backtraces or error messages

Demo/installed mypaint crash after painting stroke

INFO: mypaint: Installation layout: conventional POSIX-like structure with prefix '/usr'
WARNING: gui.userconfig: Failed to load settings file: /home/sam/.config/mypaint/settings.json
WARNING: gui.userconfig: Failed to load settings: using defaults
INFO: gui.main: No locale setting found, using system locale
INFO: lib.i18n: POSIX: LANG='en_GB.UTF-8'
INFO: lib.i18n: POSIX: LANGUAGE='en_GB:en_US'
INFO: lib.i18n: Value of LANGUAGE after cleanup: 'en_GB:en_US:C'
WARNING: gui.userconfig: Failed to load settings file: /home/sam/.config/mypaint/settings.json
WARNING: gui.userconfig: Failed to load settings: using defaults
INFO: gui.compatibility: Setting mode to 2.x (standard)
INFO: gui.compatibility: Setting default layer type to Pigment
INFO: gui.device: New device 'SEM USB Keyboard Consumer Control' (GDK_SOURCE_MOUSE, axes:4, class=X11DeviceXI2, vendor='1a2c', product='0e24')
INFO: gui.device: New device 'Lenovo Optical Mouse' (GDK_SOURCE_MOUSE, axes:4, class=X11DeviceXI2, vendor='17ef', product='600e')
INFO: gui.device: New device 'Virtual core XTEST pointer' (GDK_SOURCE_MOUSE, axes:2, class=X11DeviceXI2, vendor=None, product=None)
INFO: gui.document: Initialized background from '/usr/share/mypaint/backgrounds/mrmamurk/mamurk_e_1.png'
WARNING: gui.keyboard: Ignoring keybinding for '<Actions>/BrushModifierActions/BlendModeMenu'
INFO: gui.brushmanager: Switching default pigment setting to On
INFO: gui.compatibility: Setting default layer type to Pigment
python3.7: numpy/core/src/multiarray/alloc.c:70: _npy_alloc_cache: Assertion `NPY_CHECK_GIL_HELD()' failed.
Aborted (core dumped)

Running tests

The test which fails is consistently test_docpaint (numpy: 1.16.5)

copying /var/tmp/portage/media-gfx/mypaint-2.0.1/work/mypaint-2.0.1_python3.7/lib/lib/_mypaintlib.cpython-37m-x86_64-linux-gnu.so -> lib
test_docpaint (tests.mypaintlib.DocPaint)
Saved and reloaded documents look identical ... python3.7: numpy/core/src/multiarray/alloc.c:70: _npy_alloc_cache: Assertion `NPY_CHECK_GIL_HELD()' failed.
/var/tmp/portage/media-gfx/mypaint-2.0.1/temp/environment: line 1814:    49 Aborted                 (core dumped) "${@}"

The assertion is slightly different with a newer numpy, such as 1.19.1 (which is where I originally discovered the issue):

test_docpaint (tests.mypaintlib.DocPaint)
Saved and reloaded documents look identical ... python3.7: numpy/core/src/multiarray/alloc.c:91: _npy_alloc_cache: Assertion `PyGILState_Check()' failed.
/var/tmp/portage/media-gfx/mypaint-2.0.1/temp/environment: line 1814:    49 Aborted                 (core dumped) "${@}"

Running demo with debugging symbols

At this point, I found mypaint's debugging guide. I followed the instructions there and obtained this output (full output is in with the full backtrace log, linked below)

[...]
python: lib/fill/fill_common.hpp:146: PixelBuffer<C>::PixelBuffer(PyObject*) [with C = short unsigned int; PyObject = _object]: Assertion `PyArray_DIM(arr_buf, 2) == sizeof(C)' failed.

Program received signal SIGABRT, Aborted.
0x00007ffff7b16301 in raise () from /lib64/libc.so.6

I've also attached the full backtrace here (snippet below):

(gdb) bt
#0  0x00007ffff7b16301 in raise () at /lib64/libc.so.6
#1  0x00007ffff7aff536 in abort () at /lib64/libc.so.6
#2  0x00007ffff7aff41f in  () at /lib64/libc.so.6
#3  0x00007ffff7b0e742 in  () at /lib64/libc.so.6
#4  0x00007ffff595be99 in PixelBuffer<unsigned short>::PixelBuffer(_object*) (this=0x7fffffff7860, buf=<numpy.ndarray at remote 0x7ffff37d9170>) at lib/fill/fill_common.hpp:146
#5  0x00007ffff59614f9 in ConstTiles::init() () at lib/fill/fill_constants.cpp:21
#6  0x00007ffff59615c2 in ConstTiles::ALPHA_OPAQUE() () at lib/fill/fill_constants.cpp:40
#7  0x00007ffff5920cd3 in _wrap_ConstTiles_ALPHA_OPAQUE(PyObject*, PyObject*) (args=0x0) at lib/mypaintlib_wrap.cpp:17350
#8  0x00007ffff7d2fac4 in _PyMethodDef_RawFastCallKeywords (method=0x7ffff59b4400 <SwigMethods+7968>, self=<module at remote 0x7ffff59ef710>, args=<optimized out>, [email protected]=0, kwnames=0x0) at Objects/call.c:632
#9  0x00007ffff7d2fde8 in _PyCFunction_FastCallKeywords
    ([email protected]=<built-in method ConstTiles_ALPHA_OPAQUE of module object at remote 0x7ffff59ef710>, args=<optimized out>, [email protected]=0, [email protected]=0x0) at Objects/call.c:732
#10 0x00007ffff7d08a77 in call_function ([email protected]=0x7fffffff7a50, oparg=<optimized out>, [email protected]=0x0) at Python/ceval.c:4568

Please let me know if I can provide any more useful information.

I use Win 8 on a Surface Pro 8, and draw with a Wacom Intuos Pen&Touch Medium CTH-680 (not with the tablet pen). When using only tablet screen, drawing is as expected. When I connect my second screen, the drawing no longer appears under the cursor. An offset appears both when I draw on the main (tablet) screen, and on the secondary monitor; however the offset is in a different direction on either screen. The offset is not present when drawing with the mouse. Is any workaround known?

(Maybe this issue is not due to MyPaint... when I tried screen capturing this using an animated gif screen capture program, the pen/mouse pointer offset was different from what it is on the screen, and also the mouse showed an offset -- ok, ignore this extra info if it's confusing.)

Flatpak is a great way to distribute applications in modern GNU/Linux distributions.

To build a flatpak package locally, follow this steps:

cd flatpak
flatpak remote-add --no-gpg-verify --user my-repo ~/flatpak-repo
flatpak-builder --repo=~/flatpak-repo --force-clean my-build org.mypaint.MyPaint.json
flatpak --user install my-repo org.mypaint.MyPaint

Then it can be run from the command line like this:

flatpak run org.mypaint.MyPaint

A flatpak repository can be created to easily install MyPaint from a browser with one click. Is also possible to build a bundle for sharing with flatpak build-bundle. A central place for building and hosting Flatpak builds named Flathub is in the works. And Alexander Larsson showed interest in adding MyPaint to it.

(Migration of gna bug 20883)

MyPaint is currently unusable when using the evdev xorg driver due to the strokes breaking up frequently. Known to affect multiple UC-Logic devices from multiple vendors, including Monoprice, Huion, and whatever device this forum user was using. (Probably a Genius-branded one, according to digimend.) May affect other evdev-using devices, but uc-logic devices are more common than others.

Non-wacom devices are becoming more prevalent, especially with the recent proliferation of affordable Cintiq alternatives, and everyone but wacom seems to be standardised on using evdev, so this is a fairly nasty issue. Gtk2 apps such as Gimp, Inkscape, and older builds of MyPaint work with the evdev driver. Krita 2.8 and newer works as well.

Some devices can use the xorg wacom driver as a workaround, but this isn't a proper fix. Doing so means access to some xinput settings are lost, such as calibration ("evdev axis calibration"), which is useful for tablet display devices such as the ones by Monoprice and Huion.

The poster of the original port provided a couple sample videos and log information:

Video of the behaviour in MyPaint: https://www.youtube.com/watch?v=MnNbCo2dWlk Video of testinput + console output: https://www.youtube.com/watch?v=L_Iqs-bGWaI Log of "xinput test" and screenshot of image made during test: log, image

My device (Monoprice 19" pen display) has the same input problem and "xinput test" produces the same gaps, though in my case the gaps are more frequent and more pronounced.

He also opened a bug report against gtk3 to get help, but nothing was resolved there. Someone indicated that a difference in evdev and wacom driver's behaviour regarding coordinate reporting may be at fault, but that the behaviour difference itself isn't a bug. ref.: https://bugzilla.gnome.org/show_bug.cgi?id=703610

Affects all version of gtk3 + git-mypaint tested so far. He tested gtk 3.6.2, 3.6.4, 3.8.2; I tested 3.10.7, 3.12.0, 3.12.2.

This is one that could do with some code review and testing. It's a partial fix for mypaint/mypaint#90 that'll allow us to move on with that, and hopefully make the code more robust all over. Quick summary:

• The per-document cache folder now lives in ~/.cache/mypaint/doc.XXXXXX (on POSIX systems). It used to be down in /tmp somewhere.
• Automatically snapshot write the working document to doc.XXXXXX/autosave during inactive periods, in small, low-priority, queued chunks.
• Implements and uses a proper cross-platform file replace(), in lieu of Python3's equivalent os.replace().

This needs testing to be certain that all the autosave activity doesn't kill painting responsiveness in freehand mode, and also to be sure that the autosave_dirty flags it sets when the document's current (and saveable) state changes are being a) respected, b) set appropriately, and c) not set too frequently. It's a good idea to point a file manager at your ~/.cache/mypaint and just watch to be certain that the autosaves are doing their thing appropriately. Quick guide to how this autosave implementation works:

• Data layers know when a change they see changes their current state in a way that should be saved. Things like a painting layer's stroke_to(), or a file-backed layer's load-from-edited-file method do this now.
• All they do is set an autosave_dirty flag on themselves, however. This does nothing by itself.
• Autosaving is launched by an observer method watching the undo stack. If a new command is pushed to it, that's the cue to save out any dirty layer tree state and the document itself.
• The autosave is requested up by visiting all the layers and getting them to queue up autosave work if they're interested, and also to declare their data files in a manifest for the save and make some index XML for themselves in advance.
• The autosave ends up being a lightweight update of the tree rooted at ~/.cache/mypaint/doc.xxxxxx/autosave/. Only what's changed is updated, and writes happen at as low a priority as we can manage.
• UUIDs. UUIDs everywhere. Just because layers need a consistent identity that's independent of the tree structure for this to work.
• When the autosave chunks are all run, and all thumbnails and index stuff have been written, we clean the tree up to weed out any left-over state or tempfiles left lying around from this run or from previous runs.

There are three branches of interest here:

1. https://github.com/achadwick/mypaint/tree/issue90-autosave-threaded-1
2. https://github.com/achadwick/mypaint/tree/issue90-autosave-threaded-2
3. https://github.com/achadwick/mypaint/tree/issue90-autosave-chunked ← the one in this PR, and my favourite

I really don't like the threaded versions on vast documents however: the autosaves basically kill all performance when they kick in, even though they work off RO snapshots enough to avoid faffing with locking. You'd think this stuff would be mostly IO-bound and therefore good for threading, but nuh~uh apparently. Maybe I just misunderstand Python threading though: in fact, that's quite likely.

Description of the problem

Hi, I recently packaged libmypaint 1.3.0 for Debian and Ubuntu as a required dependency for gimp 2.10 RC1.

I just noticed that there is a file conflict. Both libmypaint and mypaint ship the translation files named libmypaint.mo

What do you recommend we do here?

1. Is it practical to package a newer version of mypaint that uses the shared libmypaint?

2. Should I disable translations in libmypaint for now? Are any of those translatable strings exposed in gimp's user interface?

Basic system details

MyPaint version: 1.2.0 Operating system: Ubuntu 18.04

This background is intended for making mockups for web applications.

It assumes that 1920x1080 is the standard screen size. It has dots every 12th of the screen, this reflects a common way of thinking of webapps in twelves.

It has partitions to indicate thirds of the screen, and the center half of the screen.

This has the additional benefit of helping the artist think in a mobile first mindset, as the centermost partition is about the same dimensions as some cellphones.

I've been told it also would appeal to webtoon artists, and I believe it would also be good for mocking up game screens.

The sides also allow for notes when not being used as part of the app's design.

Here is a zoomed out example of it in use.

• python 3 always open in universal mode, U is default mode in 3.0, and removed in 3.11
• mypaint doesn't use ld?n?gettext, so bind_textdomain_codeset isn't needed, that function is deprecated in 3.8 and is no-ops in 3.10 and removed in 3.11

Description of the problem

Brush cursor not growing after a small limit. Once it reaches a certain size the cursor will no longer reflect the actual size of the brush, which would be fine if it was an obscurely large brush size however the limit was far too small. However this is only on Windows, I have used mypaint on linux and the cursor size limit was much higher and usable without any workarounds.

Basic system details

MyPaint version: 2.0.1 w64 Operating system: Windows 10

Steps to reproduce

1. Start MyPaint on Windows 10
2. Increase brush size until it is visible that it does not grow after increasing just a few times from the default brush size

Workaround

Editing line 82 in mypaint-w64\mingw64\lib\mypaint\gui\cursor.py so that the max_cursor_size = 9999999999999999 (or some other large value) This will allow the brush size to be reflected into the cursor size far beyond the default limit (which strangely seems to work fine as expected on linux)

Description of the problem

Currently mypaint uses nose for unittests via python3 setup.py nosetests command. However, the original nose framework has ceased its development since 2015, and will be removed from Debian (and derivatives). See https://bugs.debian.org/1018417 for more information.

As a result, please consider migrating away from original nose onto other active projects, such as nose2, pytest, or python3-builtin unittests framework.

After painting a large number of pixels the program just give an error during the saving. Normally i use a 3000 x 3000 pixel board to do my draws. This problem isnt new, since i use this program for years, and in different computers, and i get the same error everytime. It's annoying because everytime i click on the "save" button i dont know if im gonna lose all the progress i made since the last save.

Basic system details

MyPaint version: [✍ 2.0.1+git.478280f2 ] Operating system: [✍ Windows 10]

Steps to reproduce

1. Start MyPaint
2. Have at least 3000 x 3000 pixel background to work with.
3. Make a draw that needs a lot of different colors.
4. Save frequently

Backtraces or error messages

ERROR: lib.fileutils: Save method failed
TypeError: file arg has no file descriptor or FILE* associated with it

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/fileutils.py", line 108, in _wrapped_save_method
    save_result = save_method(self, temp_path, *args, **kwds)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 1776, in save_ora
    thumbnail = _save_layers_to_new_orazip(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 2085, in _save_layers_to_new_orazip
    root_stack_elem = root_stack.save_to_openraster(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/tree.py", line 2541, in save_to_openraster
    stack_elem = super(RootLayerStack, self).save_to_openraster(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 527, in save_to_openraster
    layer_elem = layer.save_to_openraster(orazip, tmpdir, layer_path,
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 527, in save_to_openraster
    layer_elem = layer.save_to_openraster(orazip, tmpdir, layer_path,
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 1642, in save_to_openraster
    elem = super(StrokemappedPaintingLayer, self).save_to_openraster(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 411, in save_to_openraster
    return self._save_rect_to_ora(orazip, tmpdir, "layer", path,
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 472, in _save_rect_to_ora
    self._surface.save_as_png(pngpath, *rect, progress=progress, **kwargs)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/tiledsurface.py", line 651, in save_as_png
    lib.surface.save_as_png(self, filename, *args, **kwargs)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/surface.py", line 277, in save_as_png
    pngsave = mypaintlib.ProgressivePNGWriter(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/mypaintlib.py", line 777, in __init__
    _mypaintlib.ProgressivePNGWriter_swiginit(self, _mypaintlib.new_ProgressivePNGWriter(file, w, h, has_alpha, save_srgb_chunks))
SystemError: <built-in function new_ProgressivePNGWriter> returned a result with an error set
ERROR: lib.fileutils: cleanup: failed to remove temp path too
TypeError: file arg has no file descriptor or FILE* associated with it

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 1170, in save_cb
    self.save_file(self.filename)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 926, in save_file
    thumbnail_pixbuf = self._save_doc_to_file(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 1001, in _save_doc_to_file
    thumbnail_pixbuf = ioui.call(doc.model.save, filename, **options)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/widgets.py", line 182, in wrapper
    return func(self, *args, **kwargs)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 319, in call
    result = func(*args, **kwargs)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 1441, in save
    result = save(filename, **kwargs)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/fileutils.py", line 115, in _wrapped_save_method
    raise ex
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/fileutils.py", line 108, in _wrapped_save_method
    save_result = save_method(self, temp_path, *args, **kwds)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 1776, in save_ora
    thumbnail = _save_layers_to_new_orazip(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 2085, in _save_layers_to_new_orazip
    root_stack_elem = root_stack.save_to_openraster(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/tree.py", line 2541, in save_to_openraster
    stack_elem = super(RootLayerStack, self).save_to_openraster(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 527, in save_to_openraster
    layer_elem = layer.save_to_openraster(orazip, tmpdir, layer_path,
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 527, in save_to_openraster
    layer_elem = layer.save_to_openraster(orazip, tmpdir, layer_path,
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 1642, in save_to_openraster
    elem = super(StrokemappedPaintingLayer, self).save_to_openraster(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 411, in save_to_openraster
    return self._save_rect_to_ora(orazip, tmpdir, "layer", path,
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 472, in _save_rect_to_ora
    self._surface.save_as_png(pngpath, *rect, progress=progress, **kwargs)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/tiledsurface.py", line 651, in save_as_png
    lib.surface.save_as_png(self, filename, *args, **kwargs)
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/surface.py", line 277, in save_as_png
    pngsave = mypaintlib.ProgressivePNGWriter(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/mypaintlib.py", line 777, in __init__
    _mypaintlib.ProgressivePNGWriter_swiginit(self, _mypaintlib.new_ProgressivePNGWriter(file, w, h, has_alpha, save_srgb_chunks))
SystemError: <built-in function new_ProgressivePNGWriter> returned a result with an error set
TypeError: file arg has no file descriptor or FILE* associated with it

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 591, in _autosave_countdown_cb
    self._queue_autosave_writes()
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 630, in _queue_autosave_writes
    root_elem = self.layer_stack.queue_autosave(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/tree.py", line 2565, in queue_autosave
    stack_elem = super(RootLayerStack, self).queue_autosave(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 554, in queue_autosave
    layer_elem = layer.queue_autosave(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 554, in queue_autosave
    layer_elem = layer.queue_autosave(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 1682, in queue_autosave
    elem = super(StrokemappedPaintingLayer, self).queue_autosave(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 435, in queue_autosave
    task = tiledsurface.PNGFileUpdateTask(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/tiledsurface.py", line 1287, in __init__
    self._png_writer = mypaintlib.ProgressivePNGWriter(
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/mypaintlib.py", line 777, in __init__
    _mypaintlib.ProgressivePNGWriter_swiginit(self, _mypaintlib.new_ProgressivePNGWriter(file, w, h, has_alpha, save_srgb_chunks))
SystemError: <built-in function new_ProgressivePNGWriter> returned a result with an error set

Mypaint version: 2.0.1+git.478280f2
System information: Windows-10-10.0.19041-SP0
Using: Python 3.8.3, GTK 3.24.20, GdkPixbuf 2.40.0, Cairo 1.16.0, GLib 2.64.1
Traceback (most recent call last):
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 1170, save_cb(self=<gui.filehandling.FileHandler object>, action=<Gtk.Action object at 0x00000000123afec0 (GtkAction at 0x0000000011576a00)>)
            else:
                self.save_file(self.filename)
  variables: {'self.save_file': ('local', <bound method FileHandler.save_file of <gui.filehandling.FileHandler object at 0x0000000012399d60>>), 'self.filename': ('local', 'C:/Users/35191/Desktop/deub.ora')}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 926, save_file(self=<gui.filehandling.FileHandler object>, filename='C:/Users/35191/Desktop/deub.ora', export=False, **options={})
            """
            thumbnail_pixbuf = self._save_doc_to_file(
                filename,
  variables: {'thumbnail_pixbuf': (None, []), 'self._save_doc_to_file': ('local', <bound method FileHandler._save_doc_to_file of <gui.filehandling.FileHandler object at 0x0000000012399d60>>), 'filename': ('local', 'C:/Users/35191/Desktop/deub.ora'), 'self.doc': ('local', <gui.document.Document object at 0x00000000124cae50>), 'export': ('local', False), 'use_statusbar': (None, []), 'options': ('local', {})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 1001, _save_doc_to_file(self=<gui.filehandling.FileHandler object>, filename='C:/Users/35191/Desktop/deub.ora', doc=<gui.document.Document object>, export=False, use_statusbar=True, **options={'save_srgb_chunks': True})
            thumbnail_pixbuf = ioui.call(doc.model.save, filename, **options)
            self.lastsavefailed = not ioui.success
  variables: {'thumbnail_pixbuf': ('local', None), 'ioui.call': ('local', <bound method _IOProgressUI.call of <gui.filehandling._IOProgressUI object at 0x0000000015d51970>>), 'doc.model.save': ('local', <bound method Document.save of <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>>), 'filename': ('local', 'C:/Users/35191/Desktop/deub.ora'), 'options': ('local', {'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/widgets.py", line 182, wrapper(self=<gui.filehandling._IOProgressUI object>, *args=(<bound method Document.save of <Document nlayers...ox=Rect(-64, -1472, 3136, 3072) paintonly=False>>, 'C:/Users/35191/Desktop/deub.ora'), **kwargs={'save_srgb_chunks': True})
            try:
                return func(self, *args, **kwargs)
                # gtk main loop may be called in here...
  variables: {'func': ('local', <function _IOProgressUI.call at 0x00000000120044c0>), 'self': ('local', <gui.filehandling._IOProgressUI object at 0x0000000015d51970>), 'args': ('local', (<bound method Document.save of <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>>, 'C:/Users/35191/Desktop/deub.ora')), 'kwargs': ('local', {'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/gui/filehandling.py", line 319, call(self=<gui.filehandling._IOProgressUI object>, func=<bound method Document.save of <Document nlayers...ox=Rect(-64, -1472, 3136, 3072) paintonly=False>>, *args=('C:/Users/35191/Desktop/deub.ora',), **kwargs={'progress': <Progress 51.7/100>, 'save_srgb_chunks': True})
            try:
                result = func(*args, **kwargs)
            except (FileHandlingError, AllocationError, MemoryError) as e:
  variables: {'result': ('local', None), 'func': ('local', <bound method Document.save of <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>>), 'args': ('local', ('C:/Users/35191/Desktop/deub.ora',)), 'kwargs': ('local', {'save_srgb_chunks': True, 'progress': <Progress 51.7/100>})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 1441, save(self=<Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>, filename='C:/Users/35191/Desktop/deub.ora', **kwargs={'progress': <Progress 51.7/100>, 'save_srgb_chunks': True})
            try:
                result = save(filename, **kwargs)
            except GObject.GError as e:
  variables: {'result': ('local', None), 'save': ('local', <bound method Document.save_ora of <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>>), 'filename': ('local', 'C:/Users/35191/Desktop/deub.ora'), 'kwargs': ('local', {'save_srgb_chunks': True, 'progress': <Progress 51.7/100>})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/fileutils.py", line 115, _wrapped_save_method(self=<Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>, filename='C:/Users/35191/Desktop/deub.ora', *args=(), **kwds={'progress': <Progress 51.7/100>, 'save_srgb_chunks': True})
                    logger.error("cleanup: failed to remove temp path too")
                raise ex
            if not os.path.exists(temp_path):
  variables: {'ex': (None, [])}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/fileutils.py", line 108, _wrapped_save_method(self=<Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>, filename='C:/Users/35191/Desktop/deub.ora', *args=(), **kwds={'progress': <Progress 51.7/100>, 'save_srgb_chunks': True})
                logger.debug("Writing to temp path %r", temp_path)
                save_result = save_method(self, temp_path, *args, **kwds)
            except Exception as ex:
  variables: {'save_result': (None, []), 'save_method': ('local', <function Document.save_ora at 0x0000000011d09a60>), 'self': ('local', <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>), 'temp_path': ('local', 'C:/Users/35191/Desktop/.tmpsave.deub.ora'), 'args': ('local', ()), 'kwds': ('local', {'save_srgb_chunks': True, 'progress': <Progress 51.7/100>})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 1776, save_ora(self=<Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>, filename='C:/Users/35191/Desktop/.tmpsave.deub.ora', options=None, **kwargs={'progress': <Progress 51.7/100>, 'save_srgb_chunks': True})
            self.sync_pending_changes(flush=True)
            thumbnail = _save_layers_to_new_orazip(
                self.layer_stack,
  variables: {'thumbnail': (None, []), '_save_layers_to_new_orazip': ('global', <function _save_layers_to_new_orazip at 0x0000000011b39dc0>), 'self.layer_stack': ('local', <RootLayerStack len=8 'Raiz'>), 'filename': ('local', 'C:/Users/35191/Desktop/.tmpsave.deub.ora'), 'bbox': (None, []), 'tuple': ('builtin', <class 'tuple'>), 'self.get_user_bbox': ('local', <bound method Document.get_user_bbox of <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>>), 'xres': (None, []), 'self._xres': ('local', <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>), 'yres': (None, []), 'self._yres': ('local', <Document nlayers=92 bbox=Rect(-64, -1472, 3136, 3072) paintonly=False>), 'frame_active': (None, []), 'self.frame_enabled': ('local', True), 'settings': (None, []), 'dict': ('builtin', <class 'dict'>), 'self._settings': ('local', ObservableDict({'layervis': {'views': [], 'active_view': None, 'layer_views': [[[0], []], [[0, 0], []], [[0, 1], []], [[0, 2], []], [[0, 3], []], [[0, 4], []], [[0, 5], []], [[0, 6], []], [[0, 7], []], [[1], []], [[1, 0], []], [[1, 1], []], [[2], []], [[2, 0], []], [[2, 1], []], [[2, 2], []], [[2, 3], []], [[2, 4], []], [[3], []], [[3, 0], []], [[3, 1], []], [[3, 2], []], [[3, 3], []], [[3, 4], []], [[3, 5], []], [[3, 6], []], [[3, 7], []], [[3, 8], []], [[3, 9], []], [[3, 10], []], [[3, 11], []], [[3, 12], []], [[3, 13], []], [[3, 14], []], [[3, 15], []], [[3, 16], []], [[4], []], [[4, 0], []], [[4, 1], []], [[4, 2], []], [[4, 3], []], [[5], []], [[5, 0], []], [[5, 1], []], [[5, 2], []], [[5, 3], []], [[5, 4], []], [[5, 5], []], [[5, 6], []], [[5, 7], []], [[5, 8], []], [[5, 9], []], [[5, 10], []], [[5, 11], []], [[5, 12], []], [[5, 13], []], [[5, 14], []], [[5, 15], []], [[5, 16], []], [[5, 17], []], [[5, 18], []], [[5, 19], []], [[5, 20], []], [[5, 21], []], [[5, 22], []], [[5, 23], []], [[5, 24], []], [[5, 25], []], [[5, 26], []], [[5, 27], []], [[5, 28], []], [[5, 29], []], [[5, 30], []], [[5, 31], []], [[5, 32], []], [[5, 33], []], [[5, 34], []], [[5, 35], []], [[5, 36], []], [[5, 37], []], [[5, 38], []], [[5, 39], []], [[5, 40], []], [[5, 41], []], [[6], []], [[6, 0], []], [[6, 1], []], [[6, 2], []], [[6, 3], []], [[6, 4], []], [[6, 5], []], [[7], []]]}})), 'kwargs': ('local', {'save_srgb_chunks': True, 'progress': <Progress 51.7/100>})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/document.py", line 2085, _save_layers_to_new_orazip(root_stack=<RootLayerStack len=8 'Raiz'>, filename='C:/Users/35191/Desktop/.tmpsave.deub.ora', bbox=(0, 0, 3000, 1552), xres=None, yres=None, frame_active=True, progress=<Progress 51.7/100>, settings={'layervis': {'active_view': None, 'layer_views': [[[0], []], [[0, 0], []], [[0, 1], []], [[0, 2], []], [[0, 3], []], [[0, 4], []], [[0, 5], []], [[0, 6], []], [[0, 7], []], [[1], []], [[1, 0], []], [[1, 1], []], [[2], []], [[2, 0], []], [[2, 1], []], [[2, 2], []], [[2, 3], []], [[2, 4], []], [[3], []], [[3, 0], []], ...], 'views': []}}, **kwargs={'save_srgb_chunks': True})
        root_stack_path = ()
        root_stack_elem = root_stack.save_to_openraster(
            orazip, tempdir, root_stack_path,
  variables: {'root_stack_elem': (None, []), 'root_stack.save_to_openraster': ('local', <bound method RootLayerStack.save_to_openraster of <RootLayerStack len=8 'Raiz'>>), 'orazip': ('local', <zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>), 'tempdir': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint'), 'root_stack_path': ('local', ()), 'data_bbox': ('local', (-64, -1472, 3136, 3072)), 'bbox': ('local', (0, 0, 3000, 1552)), 'progress': ('local', <Progress 51.7/100>), 'progress.open': ('local', <bound method Progress.open of <Progress 51.7/100>>), 'kwargs': ('local', {'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/tree.py", line 2541, save_to_openraster(self=<RootLayerStack len=8 'Raiz'>, orazip=<zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>, tmpdir='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint', path=(), canvas_bbox=(-64, -1472, 3136, 3072), frame_bbox=(0, 0, 3000, 1552), progress=<Progress 5.7/10>, **kwargs={'save_srgb_chunks': True})
            # First 90%: save the stack contents normally.
            stack_elem = super(RootLayerStack, self).save_to_openraster(
                orazip, tmpdir, path, canvas_bbox,
  variables: {'stack_elem': (None, []), 'super': ('builtin', <class 'super'>), 'RootLayerStack': ('global', <class 'lib.layer.tree.RootLayerStack'>), 'self': ('local', <RootLayerStack len=8 'Raiz'>), 'save_to_openraster': (None, []), 'orazip': ('local', <zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>), 'tmpdir': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint'), 'path': ('local', ()), 'canvas_bbox': ('local', (-64, -1472, 3136, 3072)), 'frame_bbox': ('local', (0, 0, 3000, 1552)), 'progress': ('local', <Progress 5.7/10>), 'progress.open': ('local', <bound method Progress.open of <Progress 5.7/10>>), 'kwargs': ('local', {'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 527, save_to_openraster(self=<RootLayerStack len=8 'Raiz'>, orazip=<zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>, tmpdir='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint', path=(), canvas_bbox=(-64, -1472, 3136, 3072), frame_bbox=(0, 0, 3000, 1552), progress=<Progress 5.7/9>, **kwargs={'save_srgb_chunks': True})
                layer_path = tuple(list(path) + [layer_idx])
                layer_elem = layer.save_to_openraster(orazip, tmpdir, layer_path,
                                                      canvas_bbox, frame_bbox,
  variables: {'layer_elem': ('local', <Element 'stack' at 0x0000000015bbdc20>), 'layer.save_to_openraster': ('local', <bound method LayerStack.save_to_openraster of <LayerStack len=42 'Grupo 1'>>), 'orazip': ('local', <zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>), 'tmpdir': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint'), 'layer_path': ('local', (5,)), 'canvas_bbox': ('local', (-64, -1472, 3136, 3072)), 'frame_bbox': ('local', (0, 0, 3000, 1552)), 'progress': ('local', <Progress 5.7/9>), 'progress.open': ('local', <bound method Progress.open of <Progress 5.7/9>>), 'kwargs': ('local', {'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/group.py", line 527, save_to_openraster(self=<LayerStack len=42 'Grupo 1'>, orazip=<zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>, tmpdir='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint', path=(5,), canvas_bbox=(-64, -1472, 3136, 3072), frame_bbox=(0, 0, 3000, 1552), progress=<Progress 32.0/43>, **kwargs={'save_srgb_chunks': True})
                layer_path = tuple(list(path) + [layer_idx])
                layer_elem = layer.save_to_openraster(orazip, tmpdir, layer_path,
                                                      canvas_bbox, frame_bbox,
  variables: {'layer_elem': ('local', <Element 'layer' at 0x0000000015d62400>), 'layer.save_to_openraster': ('local', <bound method StrokemappedPaintingLayer.save_to_openraster of <PaintingLayer 'Camada 16'>>), 'orazip': ('local', <zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>), 'tmpdir': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint'), 'layer_path': ('local', (5, 32)), 'canvas_bbox': ('local', (-64, -1472, 3136, 3072)), 'frame_bbox': ('local', (0, 0, 3000, 1552)), 'progress': ('local', <Progress 32.0/43>), 'progress.open': ('local', <bound method Progress.open of <Progress 32.0/43>>), 'kwargs': ('local', {'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 1642, save_to_openraster(self=<PaintingLayer 'Camada 16'>, orazip=<zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>, tmpdir='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint', path=(5, 32), canvas_bbox=(-64, -1472, 3136, 3072), frame_bbox=(0, 0, 3000, 1552), **kwargs={'progress': <Progress 0.0/6>, 'save_srgb_chunks': True})
            elem = super(StrokemappedPaintingLayer, self).save_to_openraster(
                orazip, tmpdir, path,
  variables: {'elem': (None, []), 'super': ('builtin', <class 'super'>), 'StrokemappedPaintingLayer': ('global', <class 'lib.layer.data.StrokemappedPaintingLayer'>), 'self': ('local', <PaintingLayer 'Camada 16'>), 'save_to_openraster': (None, []), 'orazip': ('local', <zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>), 'tmpdir': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint'), 'path': ('local', (5, 32)), 'canvas_bbox': ('local', (-64, -1472, 3136, 3072)), 'frame_bbox': ('local', (0, 0, 3000, 1552)), 'kwargs': ('local', {'progress': <Progress 0.0/6>, 'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 411, save_to_openraster(self=<PaintingLayer 'Camada 16'>, orazip=<zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>, tmpdir='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint', path=(5, 32), canvas_bbox=(-64, -1472, 3136, 3072), frame_bbox=(0, 0, 3000, 1552), **kwargs={'progress': <Progress 0.0/6>, 'save_srgb_chunks': True})
            rect = self.get_bbox()
            return self._save_rect_to_ora(orazip, tmpdir, "layer", path,
                                          frame_bbox, rect, **kwargs)
  variables: {'self._save_rect_to_ora': ('local', <bound method SurfaceBackedLayer._save_rect_to_ora of <PaintingLayer 'Camada 16'>>), 'orazip': ('local', <zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>), 'tmpdir': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint'), 'path': ('local', (5, 32)), 'frame_bbox': ('local', (0, 0, 3000, 1552)), 'rect': ('local', Rect(2048, 704, 128, 320)), 'kwargs': ('local', {'progress': <Progress 0.0/6>, 'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/layer/data.py", line 472, _save_rect_to_ora(self=<PaintingLayer 'Camada 16'>, orazip=<zipfile.ZipFile filename='C:/Users/35191/Desktop/.tmpsave.deub.ora' mode='w'>, tmpdir='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint', prefix='layer', path=(5, 32), frame_bbox=(0, 0, 3000, 1552), rect=Rect(2048, 704, 128, 320), progress=<Progress 0.0/6>, **kwargs={'save_srgb_chunks': True})
            t0 = time.time()
            self._surface.save_as_png(pngpath, *rect, progress=progress, **kwargs)
            t1 = time.time()
  variables: {'self._surface.save_as_png': ('local', <bound method MyPaintSurface.save_as_png of <lib.tiledsurface.MyPaintSurface object at 0x0000000019db7ee0>>), 'pngpath': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint/layer-05-32.png'), 'rect': ('local', Rect(2048, 704, 128, 320)), 'progress': ('local', <Progress 0.0/6>), 'kwargs': ('local', {'save_srgb_chunks': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/tiledsurface.py", line 651, save_as_png(self=<lib.tiledsurface.MyPaintSurface object>, filename='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint/layer-05-32.png', *args=(2048, 704, 128, 320), **kwargs={'alpha': True, 'progress': <Progress 0.0/6>, 'save_srgb_chunks': True})
                kwargs['single_tile_pattern'] = True
            lib.surface.save_as_png(self, filename, *args, **kwargs)
  variables: {'lib.surface.save_as_png': ('global', <function save_as_png at 0x0000000004302550>), 'self': ('local', <lib.tiledsurface.MyPaintSurface object at 0x0000000019db7ee0>), 'filename': ('local', 'C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint/layer-05-32.png'), 'args': ('local', (2048, 704, 128, 320)), 'kwargs': ('local', {'progress': <Progress 0.0/6>, 'save_srgb_chunks': True, 'alpha': True})}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/surface.py", line 277, save_as_png(surface=<lib.tiledsurface.MyPaintSurface object>, filename='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint/layer-05-32.png', *rect=(2048, 704, 128, 320), **kwargs={})
            with open(filename, "wb") as writer_fp:
                pngsave = mypaintlib.ProgressivePNGWriter(
                    writer_fp,
  variables: {'pngsave': (None, []), 'mypaintlib.ProgressivePNGWriter': ('global', <class 'lib.mypaintlib.ProgressivePNGWriter'>), 'writer_fp': ('local', <_io.BufferedWriter name='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint/layer-05-32.png'>), 'w': ('local', 128), 'h': ('local', 320), 'alpha': ('local', True), 'save_srgb_chunks': ('local', True)}
  File "C:/Program Files/mypaint-w64/mingw64/lib/mypaint/lib/mypaintlib.py", line 777, __init__(self=<lib.mypaintlib.ProgressivePNGWriter;  >, file=<_io.BufferedWriter name='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint/layer-05-32.png'>, w=128, h=320, has_alpha=True, save_srgb_chunks=True)
        def __init__(self, file, w, h, has_alpha, save_srgb_chunks):
            _mypaintlib.ProgressivePNGWriter_swiginit(self, _mypaintlib.new_ProgressivePNGWriter(file, w, h, has_alpha, save_srgb_chunks))
  variables: {'_mypaintlib.ProgressivePNGWriter_swiginit': ('global', <built-in function ProgressivePNGWriter_swiginit>), 'self': ('local', <lib.mypaintlib.ProgressivePNGWriter;  >), '_mypaintlib.new_ProgressivePNGWriter': ('global', <built-in function new_ProgressivePNGWriter>), 'file': ('local', <_io.BufferedWriter name='C:/Users/35191/AppData/Local/Temp/save77inbbwqmypaint/layer-05-32.png'>), 'w': ('local', 128), 'h': ('local', 320), 'has_alpha': ('local', True), 'save_srgb_chunks': ('local', True)}
SystemError: <built-in function new_ProgressivePNGWriter> returned a result with an error set

Been having issues with trying to figure out how to get the pressure sensitivity to work on my Surface Studio laptop and had the same issues with the previous laptop I had, which was a Surface Pro 4. How do I enable it for the laptop with the Surface Pen.