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coredump's avatar
coredump
Visitor
11 years ago

roBitmap Scale

I have a HD image that I want to scale to fit in a given region, is there a way to do this ? Currently, it is cropped to the region. img = CreateObject("roBitmap", "pkg:/images/logo.png") ' S...
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RokuJoel's avatar
RokuJoel
Binge Watcher
11 years ago
Here's a little function I wrote a while ago to center and scale a source region to a destination region:

function scale(scalefactor as float,destregion as object,sourceregion as object) as object
    sourceregion.setalphaenable(true)
    destregion.setalphaenable(true)
    destregion.setscalemode(1)
    destregion.clear(&h00000000)
    
    ww=sourceregion.getwidth()*scalefactor
    w=destregion.getwidth()
    hh=sourceregion.getheight()*scalefactor
    h=destregion.getheight()
    
    xOffset=(w/2)-(ww/2)
    yoffset=(h/2)-(hh/2)
    ?"Yoffset:";yoffset;" xOffset:";xoffset    
    destregion.drawscaledobject(xOffset,yOffset,scalefactor,scalefactor,sourceregion)
    destregion.finish()
end function