Thank you Henrik, it looks like a huge improvement! The attached screen shots help explain why I only said "improvement" instead of "perfect". Look at the color of my translucent morph when it is upright vs. rotated. The translucency is now preserved, which is great! However, do you know why the color seems to lose so much saturation? 2010/4/8 Henrik Sperre Johansen <henrik.s.johansen@veloxit.no>:
On 07.04.2010 14:26, Henrik Johansen wrote:
On Apr 7, 2010, at 1:45 49PM, David Harvey wrote:
Hi list, I'm writing a little charting morph, and while playing with rotating text for axis labels came across something which I've noted in Morphs text handling a couple of times. If I apply a transform in a drawing operation, rotated text _appears_ to be drawn twice, slightly offset, giving a scrappy bold look. It seems only to do this when drawing on a form canvas that's backed onto the display: if you pick and drag the morph, the text is rendered beautifully. The test morph attached isolates the problem. The transcript logging is an attempt to see what might be happening: looking at the output it appears that there are circumstances in which the during: block is invoked twice. Any thoughts? David
http://n4.nabble.com/Problem-with-TransformationMorph-td1691811.html#a169181... Basically, transform doesn't work with depth 32. Workarounds are described in the thread. Cheers, Henry
David, Lukas, whomever else it may concern.
Of course I turned out to be (partly) wrong when looking into it. Transform does indeed not work with alpha, but not because of bugs in WarpBlt as I assumed, but because FormCanvas always uses the Paint rule when rotating... Try the attached code, and you should get better results. (you probably want to use smoothing > 1 if displaying text with rotation other than a multiple of 90 degrees).
This seems to be more of a generic problem though, looking at the number of places a= 32 ifTrue: [] check is made, I'll try to come up with a more consistent solution for a system-wide patch. (which amongst other things would also fix the black border appearing around a window while zooming back to old position when you drag and drop it outside main window)
Cheers, Henry
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