[Help Needed] Kivy causing python.exe crash when creating a texture on windows 10/surface pro 4

[David Hazlett]

Hi everybody,

I'd appreciate any advice on this.  I have a few Kivy programs complete but I'm trying something new with textures and I'm getting a python.exe crash on the Texture.create() call.  In my larger program I'm trying to manipulate a numpy array and visualize it as a texture but here is my simple example that is crashing.

Environment:

Tested with freshly downloaded copies of both Kivy-1.9.0-py2.7-win32-x86 and Kivy-1.9.0-py2.7-win32-x64

Windows 10 Home x64 on Microsoft Surface Pro 4

Following test program test.py:

import kivy
kivy.require('1.0.5')
from kivy.app import App
from kivy.graphics.texture import Texture
class MainApp(App):
    def build(self):
        self.main_console = MainConsole()
        self.main_console.build()
        return self.main_console
class MainConsole():
    def build(self):
        texture = Texture.create()
if __name__ == '__main__':
    MainApp().run()

When I execute this code python will crash on the line texture=Texture.create().  I have tried a number of different options (instance variable, using ObjectProperty, etc) but essentially any manipulation where I use the Texture class I get a crash - even if I'm extracting a texture from an existing Image.

I would appreciate any help..

Thanks,

Dave

[OPQ]

did you provide a size ? 

Texture.create(size=(100,100)) ? 

[Alexander Taylor]

This is (probably) because you instantiate the Texture before the opengl context is created. Doing 'from kivy.core.window import Window' first will probably fix it.

[David Hazlett]

Alexander,

That worked, thank you very much!  Many hours spent on this one :) 

Thanks,

Dave

[Oliver Spencer]

Hi,

I've added the import statement as above, however now two Kivy windows seem to load, the correct one, and also a blank one that crashes whenever the kivy.core.window import is used. Any ideas?

Thanks

On Sunday, 11 June 2017 11:23:13 UTC+1, Oliver Spencer wrote:

Hi,

I'm trying to do the same thing, however when I import 'from kivy.core.window import Window', I end up getting the Windows OpenGL error re-appearing despite the work-around of deactivating multisamples in Windows (see https://github.com/kivy/kivy/issues/3576). Is there any way to stop this happening?

Thanks,

Oliver.