Clone tool ignores source's opacity

[rj-rl]

Severity Major

Defect descirption Clone tool does not respect the source's opacity

Steps to reproduce

• Pick any drawing tool such as a brush
• Set opacity to anything below 255, the lower the value, the more pronounced the effect
• Draw any transparent shape
• Use clone tool to clone the shape elsewhere on the same layer

Expected result The cloned shape is exactly the same as the source shape

Actual result The cloned shape's color lacks some (or all) transparency

Environment Windows 10, build 19042.1415, version 20H2 LazPaint 7.1.6 (64-bit)

https://user-images.githubusercontent.com/84194921/146567283-63cadfec-3b5e-4fbd-bf39-d30b6da8570f.mp4

[circular17]

Yes this is due to the clone brush drawing each time mouse moves.

An option to clone only once each pixel could be added (see https://github.com/bgrabitmap/lazpaint/issues/395)