From 5fde17eafa11bf397bbf1f18864b8ee26d9a701d Mon Sep 17 00:00:00 2001 From: Sam Anthony Date: Mon, 9 Feb 2026 21:01:34 -0500 Subject: add region layout --- layout/subimage.go | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 layout/subimage.go (limited to 'layout/subimage.go') diff --git a/layout/subimage.go b/layout/subimage.go new file mode 100644 index 0000000..ecbe931 --- /dev/null +++ b/layout/subimage.go @@ -0,0 +1,17 @@ +package layout + +import ( + "image" + "image/draw" +) + +type subimager interface { + SubImage(image.Rectangle) image.Image +} + +// Subimage returns an image representing the portion of the image m visible through r. +// The returned value shares pixels with the original. +// Panics if the concrete image type does not have a SubImage() method. +func subimage(m draw.Image, r image.Rectangle) draw.Image { + return m.(subimager).SubImage(r).(draw.Image) +} -- cgit v1.2.3