rescale

 

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The rescale handler of DaveMennenoh saved me a lot of time. I Only experienced a strange alpha channel problem. I just solved that.

--****************************************** -- mediamacros, by DaveMennenoh -- modified, w.vdlucht@chello.nl --****************************************** --rescale (member , max width, max height) --Rescales a bitmap cast member to a given max width or max height --while preserving the original aspect ratio of the image. --This means that normally one of the dimensions of the new --bitmap will match one of the max dimensions while the other --dimension will be equal to or smaller than the other max dimension. --The new image replaces the original. --membRef - member reference of original bitmap to rescale. --maxW - maximum width of the rescaled image. --maxH - maximum height of the rescaled image. --if you use the membername you have to reset that propertie! on rescale membRef,maxW,maxH   membRef.useAlpha=FALSE--in director MX/winXP bmp's standard useAlpha=TRUE   wide=membRef.width   high=membRef.height   repeat while wide>maxW or high>maxH     if wide>maxW then       scaler=maxW/float(wide)       wide=wide*scaler       high=high*scaler       nI=image(wide,high,16)       nI.copyPixels(membRef.image,nI.rect,membRef.rect)       membRef.erase()       --k=new(#bitmap,membRef)       --k.image=nI     end if       wide=membRef.width     high=membRef.height     if high>maxH then       scaler=maxH/float(high)       wide=wide*scaler       high=high*scaler       nI=image(wide,high,16)       nI.copyPixels(membRef.image,nI.rect,membRef.rect)       membRef.erase()       --k=new(#bitmap,membRef)       --k.image=nI     end if     k=new(#bitmap,membRef)--just one time     k.image=nI     wide=membRef.width     high=membRef.height   end repeat end --***********************************************