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desktop-shell: allow to center background image

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Add the centered option as background-type. This draws the image
once in the center of the screen. If the image is larger, it will
be cropped like scale-crop.

Signed-off-by: Stefan Agner <stefan@agner.ch>
This commit is contained in:
Stefan Agner
2018-08-22 23:56:07 +02:00
committed by Daniel Stone
parent 1c1e4fdaf4
commit 20b241691b
2 changed files with 22 additions and 3 deletions
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man/weston.ini.man
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@@ -260,7 +260,10 @@ sets the path for the background image file (string).
.TP 7
.BI "background-type=" tile
determines how the background image is drawn (string). Can be
.BR scale ", " scale-crop " or " tile " (default)."
.BR centered ", " scale ", " scale-crop " or " tile " (default)."
Centered shows the image once centered. If the image is smaller than the
output, the rest of the surface will be in background color. If the image
size does fit the output it will be cropped left and right, or top and bottom.
Scale means scaled to fit the output precisely, not preserving aspect ratio.
Scale-crop preserves aspect ratio, scales the background image just big
enough to cover the output, and centers it. The image ends up cropped from