Serious RGBSurface Bug in iOS 2020R2.1 (case 63148 )

Targets iOS
#1 
Here is all the code needed to reproduce:

//RGBSurface test
    Var testpic As New picture (100,100)
    testpic.Graphics.DrawingColor = &cA0B0C0  //chalky blue color
    testpic.Graphics.FillRectangle 0,0,100,100

Var ReadFromPicture As Color
ReadFromPicture = testpic.RGBSurface.pixel(20,20)

ReadFromPicture in debugger has value &cA0B000FF
Has lost the Blue component completely!!
also displays as white because the Alpha component is FF not 00

63148 - RGBSurface.pixel gives incorrect color on iOS

ps: I know Its Xmas. Already handled 20 support emails from my customers. Not expecting any reaction until 2021 … the mince pies are calling!

2 Likes
#2

I agree, not sure what it is doing but you definitely don’t get the correct color out of the surface.

#3

Just out of curiosity, is this just the simulator or are you seeing this on devices too? I ask because there’s a bug in the 14.3 simulator that looks a lot like what you’re describing…

#4

Currently, I am completely unable to get a build onto any actual device since moving to 2020R2, so I can’t check that.
At the end of the build process, I always get a huge error message.

Its unlikely to have the same cause as the issue you quoted- this only happens when querying RGBSurface for me.
Certainly my nav bars and toolbars are not discoloured.

But I know at one point I did experiment with the settings for ‘File > GPU Selection > Prefer Integrated GPU’ without success

#5

Hi Jeff,

Do you have a working example of RGBSurface working on IOS ? I am still not getting the correct colours back from pixel.

#6

Do you have a working example of RGBSurface working on IOS

No, that’s more or less the point. It doesn’t work on iOS
To get the right color, I have to use a plugin.

Var gmpic As New GMImageMBS(pic)
var getcol as GMColormbs
var thiscol as Color

getcol = gmpic.pixelColor(rx,ry) 
thiscol = Color.RGB(getcol.redQuantum,getcol.greenQuantum,getcol.blueQuantum)

I’ve been asked if this only happens on the simulator.
Sadly, I have not yet been able to get my app onto a device - nothing that I have tried in terms of certs, licences, provisions, and kicking the dang machine will get me something that actually installs to a device.
I keep getting ‘unable to validate’ errors.
So I cant say if it is simulator only