iOS Question LoadBitmapResize image is blurred if the image scale down

Alexander Stolte · Dec 4, 2018

Hello,

i have a problem with LoadBitmapResize, it is recommended to use it, but i have this strange output:

Left is the icon with "LoadBitmap" and right it is load with "LoadBitmapResize"

The Icon is 100x100.
I use the width and height of the imageview.

B4X:

ImageView1.Bitmap = LoadBitmapResize(File.DirAssets,"newest_filled.png",ImageView1.Width,ImageView1.Height,True)

Why is that so? In B4A this icon looks good with LoadBitmapResize, it is the same code.
In the attachment is a sample project to demonstrate it.

Erel · Dec 5, 2018

Moved to the questions forum.

The bitmap returned has a scale of 1.0. This is lower than your device scale. You will get a sharp image by creating a larger image based on the device scale:

B4X:

Dim scale As Float = GetDeviceLayoutValues.NonnormalizedScale
ImageView1.Bitmap = LoadBitmapResize(File.DirAssets,"newest_filled.png",ImageView1.Width * scale,ImageView1.Height * scale,True)

Alexander Stolte · Dec 7, 2018

Because i'm lazy:

B4X:

Public Sub LoadBitmapResize2(Dir As String,FileName As String,Width As Int, height As Int,KeepAspectRatio As Boolean) As B4XBitmap
    
    #If B4A
    
    Return LoadBitmapResize(Dir,FileName,Width,height,KeepAspectRatio)
    
    #Else IF B4I
    
    Dim scale As Float = GetDeviceLayoutValues.NonnormalizedScale
    Return     LoadBitmapResize(Dir,FileName,Width  * scale,height  * scale,KeepAspectRatio)
    
    #End If
    
End Sub

iOS Question LoadBitmapResize image is blurred if the image scale down

Alexander Stolte

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Erel

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Alexander Stolte

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iOS Question LoadBitmapResize image is blurred if the image scale down

Alexander Stolte

Expert

Attachments

Erel

B4X founder

Alexander Stolte

Expert

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