How to crop a scaled picture?

Audio and Graphics
#21

I adjusted the final image size to be a multiple of 4, then it’s ok

#22

but my final end ratio is not 1:1, it’s dynamic… how to achieve this?

#23

Just adjust the 256 values to whatever you want but make sure they are multiple of 4. BTW I have no idea if this will fix the problem.

#24

I thought it’s ok, but after a few days observations, some of the pictures still have artifact edges… although I have adjusted the final size to be a multiple of 4 pixels…  :frowning:

#25

Thanks a lot, this was really useful for me right now :slight_smile:

#26

I found the artifacts edges might appear/disappear when using different devices

I am using “ZoomEven”

I am wondering if the final size has to be calculated with something else, like the viewable height/width

#27

Try the modification I mention above:

[lua]

local endWidth  = 256 * display.contentScaleX

local endHeight = 256 * display.contentScaleY

[/lua]

Then rescale the resulting image.

#28

but my final end ratio is not 1:1, it’s dynamic… how to achieve this?

#29

Just adjust the 256 values to whatever you want but make sure they are multiple of 4. BTW I have no idea if this will fix the problem.