Containers for photos, with scroll, drag&drop between them
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last edited by jmv38Hello folks,
I am not happy with the various solutions to manage my photos on the ipad. I would like to have a panel with
- a container with a thumbnail of my photos, in 1 d, scollable
- several containers in which i can d&d the photos I want to assemble
- for each of those a page in wich i can arrange the selected photos in the layout i want
- save the layout in camera roll when i am happy with it
- save all the containers data so i can rework my choices.
ideally all these is real time. This is to prepare my printed photoalbums before ordering them (the online tools are way too slow and cumbersome and unaccurate to do the preparation work on them - I usually use ‘Print To Size’ app for that).
I think pythonista is able to do that. But i am not (yet).Could you guys point out for me some existing code bricks you know about that I could re-use and assemble for this project?
I already heave found some excellent gesture repos, but not the scrollable photo container. I could do it myself but considering my poor python skills it is going to take me 2 or 3 weeks, so if i can use already available code, that’s good to spare the effort for the overall app. And i have noticed it is much easier for me to start from someone else good code and bend it to my will, rather than starting from scratch myself.Please help me!
Thanks
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last edited by 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)
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last edited by@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
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last edited bySame crash with
Image.warnings.simplefilter('error', Image.DecompressionBombWarning) Image.MAX_IMAGE_PIXELS = 100000000000
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last edited by@cvp 5000 doesnt work for me and 5000<7000
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last edited by@jmv38 and Sure that you don't have two pixels py point?
What is your device?
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last edited by@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.
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last edited by@jmv38 could you post your code, only this part, and the image you use?
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last edited by@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 ideadef 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.
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last edited by@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
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last edited by@cvp you are correct. My pb was pbly sthg else.
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last edited by@jmv38 The only 4096 limit I find for iPad Air is Max OpenGL Texture Sizes
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last edited by cvpFrom here
The UIImage documentation (as of iOS 10) no longer seems to mention size limitations, although if you use UIImageView with images whose dimensions are larger than the maximum texture size* supported by the device you happen to be using you do get very large memory consumption at render time.
(The memory consumption I see in Instruments seems to indicate that the entire image is put into a 32 bits per pixel buffer when the CA::Layer is rendered.)
If your app doesn't get kill by the OS due to memory usage, the UIImageView does still end up displaying the image though.
Given this, you'll still need strategies to deal with very large images.
- You can check the maximum texture size using something like glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);. Just make sure you've set the EAGLContext current context to be something non-nil before querying OpenGL, otherwise you'll get zero.
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last edited byI've tried in ObjectiveC, following this and this
and I have same crash with very big files of more than 25MB
# https://gist.github.com/jsbain/389a67c5aacb097b87fd # https://github.com/tdamdouni/Pythonista/blob/master/_2017/core_image.py import ui from objc_util import * import ctypes import os 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 = 7000 h = w*hi/wi print(w,h) # 7776 5184 with ui.ImageContext(w,h) as ctx: iv.draw_snapshot() ui_image = ctx.get_image() uio = ObjCInstance(ui_image) c.UIImageJPEGRepresentation.argtypes = [c_void_p, CGFloat] c.UIImageJPEGRepresentation.restype = c_void_p quality = 1.0 data = ObjCInstance(c.UIImageJPEGRepresentation(uio.ptr, quality)) filename = os.path.abspath('t1.jpg') data.writeToFile_atomically_(filename, True)
