canvas.draw_image() function does not work

cvp

You need a "named image"

What is that? For me, in Ui.Image.named(name), name is a file name

And the crash does not have any explanation in faultlog, only "abort"????

cvp

@Trüff perhaps a canvas bug, try this (with, of course, your own file name)

img = ui.Image.named('kitty.JPG')
clipboard.set_image(img)
#cv.draw_image("kitty.JPG", 0, 0, img_w, img_h)
cv.draw_clipboard(0, 0, img_w, img_h)

ccc

https://omz-software.com/pythonista/docs/ios/ui.html#ui.Image.named
--> cv.draw_image(ui.Image.named("image.png"), 0, 0, img_w, img_h)

cvp

@ccc that does not work, draw_image wants a string as first argument

cv.draw_image(ui.Image.named("kitty.JPG"), 0, 0, img_w, img_h)
TypeError: argument 1 must be str, not _ui.Image

cvp

@Trüff could you tell me if this solves your problem, thanks

img = ui.Image.named('image.png')
clipboard.set_image(img)
cv.draw_clipboard(0, 0, img_w, img_h)

Trüff

@cvp Hm… Well, it does draw the image onto the canvas. But the image I want to draw is transparent and apparently it just sets a white background for images that are saved into the clipboard. So when I draw the clipboard with the image inside of it, the picture is not transparent anymore.

ccc

Keep the alpha low on the background color like:

https://forum.omz-software.com/topic/3926/transparent-scene-background-using-objc_utils

Trüff

@ccc Ok thank you. I‘m going to read the documentary on these modules first.

cvp

@ccc said

Keep the alpha low on the background color

If the image he wants to draw is transparent, its background color has already a low alpha.

cvp

@Trüff I don't know if you really need a canvas, else, please try this

import ui
v = ui.View()
v.background_color = 'yellow'
iv = ui.ImageView()
iv.background_color = 'red'
iv.image = ui.Image.named('image.png')
wi,hi = iv.image.size
iv.frame = (10,10,150,150*hi/wi)
v.add_subview(iv)
v.present('fullscreen')

Trüff

@cvp This also doesn‘t work with transparent pictures for me. However, I tried out your previous idea of saving the image into the clipboard and drawing the clipboard but I used the class Image from the PIL module instead of the one from Pythonista‘s ui module and that worked. Thank you!

cvp

@Trüff saiD

This also doesn‘t work with transparent pictures for me

Weird, for me it works, the image of my example has a transparent background, here in red

cvp

@Trüff said

but I used the class Image from the PIL module instead of the one from Pythonista‘s ui module and that worked

👍