Replace supported image extension list with image detection via MagickImageInfo.

[mooflu]

Fixes #802 #768

[xupefei]

My main concern is ImageMagick handles way more file types than images, such as PDF.
Could you adjust the Property of this plugin to -4 (1 higher than TextViewer) so that it will not steal previews of other plugins?

[mooflu]

Good point. With ffmpeg installed it'll also try to handle video formats. VideoViewer has priority -10. I guess prio values would need to be VideoViewer > ImageViewer > TextViewer. E.g. -3, -4, -5 ; comment in VideoViewer says "make it lower than TextViewer" but not why.

[mooflu]

It was changed to lower than TextViewer here: 24c0316

I see .ts as a video file extension, so if video was > text it would try to view typescript files as video. So I can see why video would need to be lower that text if video only goes by file extension. :(

[mooflu]

Tried to do the same in VideoViewer and detect audio/video file via MediaInfo instead of file extensions. See latest WIP - currently re-creates MediaInfo in both CanHandle and Prepare. Out of time for today...

[mooflu]

Build artifacts for the latest here:
https://ci.appveyor.com/project/mooflu/quicklook-moar-image-types/build/artifacts

[User198263321]

Does it also support .jfif files?

EDIT: This was added in a test build 4 months ago

[mooflu]

@Michael82548 yes, should work. Both in the nightly build (https://github.com/QL-Win/QuickLook#downloadinstallation) as well as the test build for this merge request above.

[xupefei]

I'm quite busy in the past few days. Will try to review this PR by this weekend.

[xupefei]

Great job, thanks!

[xyz7z]

@mooflu
Thanks for pulling such a request, and it helps me a lot. However, It seems that the new merged commit has some performance problems.
Once you select one JP2 file, the program will take a long time to open it and not all files with JP2 extension are supported. that is the first problem.
Before the program succeeds to open the first JP2 file, select the next file using arrow keys， it seems that the program failed to release the memory of the fist image, even if you close the window of QuickLook completely. that is the second problem.

[xupefei]

I disabled detecting images using ImageMagick due to:

• The detection will load the whole file, which is very slow when the file is large,
• Need a better way to handle misdetection. For example, ImageMagick treat all XML files as SVG.