[mojo2] Getting wrong colors rendered

Monkey Forums/Monkey Programming/[mojo2] Getting wrong colors rendered

Shinkiro1

(Posted 2016) [#1]

Today I noticed there is something off with the colors of my images. I used a color picker and confirmed that the values are not the same as in the actual image.

edit: original and ingame should be flipped

It would be really helpful if you could tell me if it's the same for you guys. Here is an isolated testcase.

Function Main:Int()
	New ColorsAreWrong
	Return 0
End

Class ColorsAreWrong Extends App
	Field img:Image
	Field canvas:Canvas

	Method OnCreate:Int()
		canvas = New Canvas
                img = Image.Load("image.png")
		img.SetHandle(0, 0)
		Return 0
	End

	Method OnRender:Int()
		canvas.Clear()
		canvas.DrawImage(img)
		canvas.Flush()
		Return 0
	End
End

You can use this image:

Value should be:
Hex: #33CBB6
RGB: 45,196,174

I tested this on Html5 and Desktop targets.

Shinkiro1

(Posted 2016) [#2]

Update: I found out that this does not happen with every image?! The one I provided you with should be fine.
So it seems have to save a png the right way ...

PS: WOW, so Pixelmator (Mac App) somehow saves pngs in the wrong format when doing it normally. For anyone in the same situation:
The workaround is to save via File -> Export (not for web).

skid	(Posted 2016) [#3]

I expect save for web is using pngcrush and pngquant to minimise file size by reducing palette to less than 256 colors.

Shinkiro1

(Posted 2016) [#4]

The problem is that a normal save will also save the wrong format. The images look identical when looked at in an image viewer/editor, just in monkey it messes up.

SLotman

(Posted 2016) [#5]

Probably not just in Monkey - since it doesn't implement a PNG loader from scratch or anything - it will happen with a lot of other programs too.