IDK if I could be doing something wrong, but DrawScaledObject() isn't behaving as expected, even when it does draw.
For example, I'm scaling a bitmap up by 2x in each direction. This is done so that I only need 1/4 of the space to store the bitmap. The bitmap is wider than the screen/viewport. I use an roRegion object to scroll through it. regionStart% represents the x-offset into that source bitmap. The ViewBM is the destination bitmap that receives the scaled object.
<snip>
backgroundRegion = CreateObject("roRegion", BackgroundBM, regionStart%, 0, bw%, bh%)
ViewBM.DrawScaledObject(0, 0, 2.0, 2.0, backgroundRegion)
ViewBM.DrawObject(0,0, backgroundRegion) ' <--- DEBUGGING test window - unscaled in u/l corner
BackgroundSprite.SetRegion(viewRegion)
<snip>
There is an extra line of testing code as noted by the arrow. It shows an unscaled version of the source in the upper left of the viewport.
The issue: the unscaled bitmap works fine and scrolls as expected as regionStart% is incremented. bw% and bh% are set to the correct sub-section of the source bitmap. The scaled result is moving diagonally even though the source region's Y value is 0. The scaled map at source-region 0,0 looks fine (hard to tell with overscan).
Thus, there seems to be an issue with a source region not at 0,0. This could be remedied by blitting it to a temp bitmap 1st, then scaling that, but I thought I should mention it since it is supposed to work on an roRegion. Or did I miss something/mess up my code and/or not understand the function?
Anyone else have an issue with a scaling bitmap using roRegion/DrawScaledObject at non 0,0 source?
P.S. Software version 3.0 - build 2227
