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Correct for image orientation when loading image

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PEG and other image formats may include an EXIF orientation tag
which indicates in what orientation (rotation and mirroring)
the image should be displayed. libgdk-pixbuf does not correct for this
when loading an image, but provides a function to apply the transform
after the fact, which this commit uses.

Pulled from https://github.com/swaywm/swaybg/pull/68
This commit is contained in:
Neil Muller 2024-06-03 17:21:15 +02:00 committed by Simon Ser
parent f9ce3f193b
commit b70d85ec14
1 changed files with 5 additions and 1 deletions
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6
background-image.c
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@ -31,8 +31,12 @@ cairo_surface_t *load_background_image(const char *path) {
err->message);
return NULL;
}
image = gdk_cairo_image_surface_create_from_pixbuf(pixbuf);
// Correct for embedded image orientation; typical images are not
// rotated and will be handled efficiently
GdkPixbuf *oriented = gdk_pixbuf_apply_embedded_orientation(pixbuf);
g_object_unref(pixbuf);
image = gdk_cairo_image_surface_create_from_pixbuf(oriented);
g_object_unref(oriented);
#else
image = cairo_image_surface_create_from_png(path);
#endif // HAVE_GDK_PIXBUF