Android Question Unwanted Pixel appearance at the corners

klaus

Expert

Licensed User

Longtime User

• Apr 16, 2019

• #2

What corner dots are you speaking of?

 

Upvote 0

S

Scantech

Well-Known Member

Licensed User

Longtime User

• Apr 16, 2019

• #3

I have circled with red color to point out the dots.

 

Attachments

• Pic.jpg

  293.8 KB · Views: 241

Upvote 0

klaus

Expert

Licensed User

Longtime User

• Apr 16, 2019

• #4

It depends also on the device screen resolution.
This is the corner on my Samsung Galaxy S8.



I suppose that the problem is due to the anti aliasing.
From what I know, it cannot be disabled.
BitmapCreator has a ReplaceSemiTransparentPixels(NewColor As Int, Rect As B4XRect) method.
Not sure if it will solve your problem.

 

Upvote 0

S

Scantech

Well-Known Member

Licensed User

Longtime User

• Apr 16, 2019

• #5

that did not work(replacesemiTransparentPixels)

 

Upvote 0

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Apr 17, 2019

• #6

I see it too after I take a screenshot and enlarge it. It is not noticeable on the device directly.

If you can reproduce it in a small project then I can further investigate it.

 

Upvote 0

S

Scantech

Well-Known Member

Licensed User

Longtime User

• Apr 17, 2019

• #7

Here you go. Emulator will be a great way to see it or 480x800 screen resolution

 

Attachments

• SampleDotsShown.zip

  9.9 KB · Views: 181

Upvote 0

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Apr 18, 2019

• #8

You are calling DrawRectRounded with corner radius set to 0. This case is easy to fix. DrawRectRounded should call DrawRect.
Does it happen in other cases where the radius > 1 ?

 

Upvote 0

S

Scantech

Well-Known Member

Licensed User

Longtime User

• Apr 18, 2019

• #9

Erel said:

Does it happen in other cases where the radius > 1 ?

Click to expand...

No it is fine greater then 0. I changed it to DrawRect2 and its ok. Thanks

 

Upvote 0

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Apr 19, 2019

• #10

I will update BitmapCreator to draw with DrawRect when the radius < 1.

 

Upvote 0