Calling load_image_data results in SystemError: PY_SSIZE_T_CLEAN macro must be defined

[Striblezz]

When doing various tasks related to trying to draw PIL images in a scene, I keep running into this PY_SSIZE_T_CLEAN macro error.

At the moment, I am trying to follow the steps in the help for scene_drawing.image, which says to use load_image_data, but when I do I get the following:

File "/var/containers/Bundle/Application/7498AEDC-912F-4F8B-8AFF-310FEFFCA3BE/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/site-packages/pythonista/scene_drawing.py", line 32, in load_pil_image
    return load_image_data(b.getvalue())
SystemError: PY_SSIZE_T_CLEAN macro must be defined for '#' formats

Alternatively, is there a way to set per pixel data on a Scene Image/Texture without using a PIL.Image?

Any help would be much appreciated.

Thanks,
Josh

[salabim]

I had the same problem in my salabim package.

There is a simple -not very elegant- solution:

                try:
                    ims = scene.load_pil_image(capture_image)
                except SystemError:
                    im_file = "temp.png"  # hack for Pythonista 3.4
                    capture_image.save(im_file, "PNG")
                    ims = scene.load_image_file(im_file)

[Striblezz]

Thanks, that did work!

I was able to successfully draw the image in the scene's draw method:

    image(self.ims, 100,100)

Though I'm not thrilled about having to write to a file every time the source image changes.

Since the saving method did work, and the key to saving that I had previously missed (coming from a Palette "P" mode PIL image) was the convert() step, I decided to revisit a method I had tried previously, and I was able to save the image data to memory, then load the data into a ui.Image, and use that to create a Texture for a SpriteNode.

So starting with pil_palette_img...

    img_cpy = pil_palette_img.convert()    # convert image from "P" mode and preserve palette
    ui_img = pil2ui(img_cpy)               # save pil image to memory buffer then load into ui.Image 
    SpriteNode(Texture(ui_img), position=self.center, parent=self)

I had previously found pil2ui here:

def pil2ui(imgIn):
  with io.BytesIO() as bIO:
    imgIn.save(bIO, 'PNG')
    imgOut = ui.Image.from_data(bIO.getvalue())
  del bIO
  return imgOut

Though without first calling convert() on the palettized pil image, it was failing with "could not load image".
When I found load_image_data it mentioned needing to convert, but then I started getting the error in the OP, and I didn't go back and try the previous method until you suggested saving the data to a file, so thanks for pointing me back to the right direction!

It would still be nice to be able to have direct access to the pixel data in a scene image, if possible.

[omz]

@Striblezz Do you have the Pythonista 3.5 beta or is this with the App Store version?

[Striblezz]

I have the store version 3.4