draw: merge draw_go117.go into draw.go

This can be done as Go 1.21 and 1.20 are the supported versions by now, and Go 1.16 is long since unsupported. Change-Id: Ib90f796d6c38dbb9ffd99d56faf344ee9784f9bc Reviewed-on: https://go-review.googlesource.com/c/image/+/526896 Reviewed-by: Dmitri Shuralyov <[email protected]> LUCI-TryBot-Result: Go LUCI <[email protected]> Reviewed-by: Nigel Tao (INACTIVE; USE @golang.org INSTEAD) <[email protected]> Auto-Submit: Dmitri Shuralyov <[email protected]> Reviewed-by: Nigel Tao <[email protected]>
golang · Sep 8, 2023 · 491771c · 491771c
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diff --git a/draw/draw.go b/draw/draw.go
@@ -47,6 +47,12 @@ func (floydSteinberg) Draw(dst Image, r image.Rectangle, src image.Image, sp ima
 // Image is an image.Image with a Set method to change a single pixel.
 type Image = draw.Image
 
+// RGBA64Image extends both the Image and image.RGBA64Image interfaces with a
+// SetRGBA64 method to change a single pixel. SetRGBA64 is equivalent to
+// calling Set, but it can avoid allocations from converting concrete color
+// types to the color.Color interface type.
+type RGBA64Image = draw.RGBA64Image
+
 // Op is a Porter-Duff compositing operator.
 type Op = draw.Op
 

diff --git a/draw/draw_go117.go b/draw/draw_go117.go