Bug 25780 - OutOfMemory with Images in WP8
Summary: OutOfMemory with Images in WP8
Status: RESOLVED FEATURE
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.3.0
Hardware: PC Windows
: Normal enhancement
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2015-01-07 10:41 UTC by Oren Novotny
Modified: 2016-05-28 00:51 UTC (History)
6 users (show)

Tags: windows memory image list view ac
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FEATURE

Description Oren Novotny 2015-01-07 10:41:34 UTC
When trying to load an RSS feed into a ListView, I kept hitting OOM exceptions on WP8. Digging deeper, the issue stems from the ImageRenderer not setting an appropriate DecodeImageHeight/DecodeImageWidth on the BitmapImage, so it takes up too much memory.

I worked around it with a custom renderer on Images, but something as basic as this should be the default. Basically, if RequestedHeight/RequestedWidth is specified on the image, it should set the decode values on the BitmapImage.
Comment 1 Oren Novotny 2015-01-07 11:46:55 UTC
I wrote up a renderer that fixes the OOM and properly frees up the contained BitmapSources' memory here:
https://gist.github.com/onovotny/37b28ce8e7eee4ce61d2
Comment 2 Oren Novotny 2015-01-13 10:14:51 UTC
I have a full repro here:
https://github.com/onovotny/xamarin-image-size-test
Comment 4 Jason Smith [MSFT] 2015-06-11 14:58:50 UTC
We will need to add new API to set the decode size.
Comment 5 Samantha Houts [MSFT] 2016-05-28 00:51:04 UTC
Thank you for taking the time to submit this feature request. We like this idea and have added it to our internal feature tracking system.

Warm regards,
Xamarin Forms Team