Saving image with campixel shifted/clipped by 1 pixel

[jebej]

• CairoMakie v0.13.1
• fresh temporary environment
• Windows 10

Using the code found here

using CairoMakie
x = rand(30, 40)
scene = Scene(camera=campixel!, size=size(x))
heatmap!(scene, x)
save("out.png", scene, px_per_unit=1)

This first issue is that now we must use px_per_unit=1 to get a png out with the same resolution as the image matrix, otherwise it is twice as big. The bigger issue however, is that one row and column of pixels is clipped, and replaced on the other side with what appears to be an interpolation with white. See this image (zoom in with paint.net or similar to preserve pixels without interpolation):

This problem may in fact be related to the default px_per_unit=2, as in that case the image is clearly shifted by 1/2 "unit", aka one pixel: