Containers for photos, with scroll, drag&drop between them

cvp

but it still doesnt work: now the button shows in gray, not white, and is not visible on my gray background.
I wonder how to get it simply as it shows in the editor?

You asked gray and I didn't know you had a gray background

jmv38

@cvp i have finished my first version of the program
here https://gist.github.com/1b67ba85ca7bd7b23c7058216895372c
this will:

let you choose an album xxxx
load the 200 first pictures
present them in a photopicker
from which you can build photo album pages (collage)
it creates 2 new albums:
xxxx_pages : the album pages
xxxx_pages_and_photos: as it says. useful to upload the album in photoweb printing service for instance
your own photos and albums are not modified

to see how to use it tap ‘?’ button: it opens a youtube video that shows it in action.

It is designed to work in lanscape mode
let me know how it works for you.

jmv38

@cvp hello again!

I am trying to make a high definition image with draw_snapshot()
I works fine until the context width is 4000, but i get a black image when the context width is 5000 or more. I need 9000....
Any suggestion?
Thanks.

cvp

@jmv38 Sorry, I forgot to tell you, 20 days ago, I had tried your Appli.py it I don't have any album in my photos, thus I tap the X in the first screen, and your program crashes in line
inputAlbum = allAlbums[inputTitle] 😢

cvp

@jmv38 this works for me

import ui
iv = ui.ImageView()
iv.image = ui.Image.named('P1020096.JPG') # 3888 x 2592 pixels
wi,hi = iv.image.size
iv.frame = (0,0,wi,hi)
print(wi,hi)															# 3888 2592
w = 2*wi
h = 2*hi
print(w,h)																# 7776 5184
with ui.ImageContext(w,h) as ctx:
	iv.draw_snapshot()
	ui_image = ctx.get_image()
	with open('t1.jpg', 'wb') as f:
		f.write(ui_image.to_jpeg(0.9))			# 15552 x 10368

cvp

But 9000 x 6000 crashes..

jmv38

@cvp thank for the info
i check again

jmv38

@cvp i had forgotten that 4000 is really 8000 because x2
i think 8000 should be enough for prints 60 cm wide => thanks. you saved my last week of coding!

However it is strange that 15000 is ok bu not 9000...?

Concerning the use of the project without any album, i could modify this for you if you are really interested in using this code. Are you?

thanks.

cvp

@jmv38 Not interested actually, thanks. If needed, I'll create an album.

cvp

@jmv38 During my tests and my multiple crashes, I'm pretty sure I have seen a red message during one microsecond, containing the words Decompression Bombs

This is a [PIL message](Decompression Bombs) .
I didn't use PIL. Perhaps the ui.Image.save uses it...

Something like, it not sure, message disappeared immediately
/usr/lib64/python2.6/site-packages/PIL/Image.py:2261: DecompressionBombWarning: Image size (166109750 pixels) exceeds limit of 89478485 pixels, could be decompression bomb DOS attack. DecompressionBombWarning)

cvp

@jmv38 said:

However it is strange that 15000 is ok bu not 9000...?

15000 is in pixel, already multiplied by 2. The width was 7776, just < 9000

cvp

Same crash with

Image.warnings.simplefilter('error', Image.DecompressionBombWarning)
Image.MAX_IMAGE_PIXELS = 100000000000

jmv38

@cvp 5000 doesnt work for me and 5000<7000

cvp

@jmv38 and Sure that you don't have two pixels py point?
What is your device?

jmv38

@cvp i do have 2 pixels per point (ipad air)
i dont crash, it is just that the image saved is black
i checked that 4x1024 is ok and 4x1025 fails
i remember this ios limit 4096 from somwhere.

cvp

@jmv38 could you post your code, only this part, and the image you use?

jmv38

@cvp just to let you know here is my code.
It wont run because the rest of the code is missing, but it gives you the idea

def save(self):
    # make a hi resolution copy of back & images, then save it in camera roll
    xo, yo, w, h = self.page.back.frame
    c = self.page.back.background_color
    targetWidth = 4*1024
    s = targetWidth / w
    w, h = w*s, h*s
    page = ui.View( frame=(0,0,w,h), background_color=c)
    views = []
    for thumb in self.thumbs:
      x,y,w,h = thumb.frame
      x,y,w,h = (x-xo)*s, (y-yo)*s, w*s, h*s
      v = ui.View( frame=(x,y,w,h) )
      x,y,w,h = thumb.iv.frame
      x,y,w,h = x*s, y*s, w*s, h*s
      img = thumb.getImage(thumb.asset)
      iv = ui.ImageView(frame=(x,y,w,h), image=img)
      v.add_subview(iv)
      page.add_subview(v)
      views.append(v)
    # save page image in pythonista
    getTopView().add_subview(page)
    #page.bring_to_front()
    #if True: return
    path = 'temp.jpg'
    with ui.ImageContext(page.width, page.height) as ctx:
      page.draw_snapshot()                            
      ui_image = ctx.get_image()
    pil = Image.open(io.BytesIO(ui_image.to_png()))
    pil.save(path , quality=99)
    # save page image in albums
    asset = photos.create_image_asset(path)
    os.remove(path)
    getTopView().remove_subview(page)
    views = False
    console.hud_alert('saved')

looks like i must add the view to the screen to get the draw snapshot to work.

cvp

@jmv38 said:

looks like i must add the view to the screen to get the draw snapshot to work.

Not at all, I think. You've seen my little code, nothing goes to the screen

jmv38

@cvp you are correct. My pb was pbly sthg else.

cvp

@jmv38 The only 4096 limit I find for iPad Air is Max OpenGL Texture Sizes