Media: Add support for rendering PDF thumbnails.

When support for PDFs is available, on upload,
render 'Thumbnail', 'Medium', 'Large', and 'Full' sizes of
the first page, and save them in attachment meta.

Use these renders within Add Media, Media Gallery and List views,
Attachment Details, Post/Attachment Edit screens, and Attachment pages.

Support available by default via Imagick -> ImageMagick -> Ghostscript,
but can be provided by any `WP_Image_Editor` that supports PDFs.

Props adamsilverstein, azaozz, celloexpressions, desrosj, dglingren, ericlewis, ipstenu, joemcgill, joyously, markoheijnen, melchoyce, mikeschroder, tomauger.
Fixes #31050.

git-svn-id: https://develop.svn.wordpress.org/trunk@38949 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Mike Schroder
2016-10-26 07:27:51 +00:00
parent 16bfeb6608
commit 35e6dbe14f
7 changed files with 163 additions and 17 deletions
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