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Index › Programming Questions & Help › Programs › scale smooth or fast

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scale smooth or fast (Read 1398 times)

hungerburg YaBB Newbies Offline Posts: 21	scale smooth or fast Nov 28^th, 2006, 11:38pm hello, my sketch displays an image ten times its size. on the macintosh it gets blurry - but it should not! I read in the jdk api, scaling an image takes a parameter, SCALE_FAST or SCALE_SMOOTH - is there a way to pass these to the image function in processing? thank you in advance peter

hungerburg YaBB Newbies Offline Posts: 21	Re: scale smooth or fast Reply #1 - Nov 28^th, 2006, 11:51pm Oops, I am a little late to read the api doc - every PImage has a public field "smooth" - Now its set to false - I will report how this did in safari. does this mean, java 1.4 on linux is missing a smooth scaler? peter

hungerburg

Help: scale smooth or fast
Reply #2 - Dec 3^rd, 2006, 3:08am

hello again,

So I did some testing: I set the source PImage's field "smooth" to false, and also called "noSmooth()" in setup. still in safari the image gets blurry when mapped to the drawing surface. (unlike java 1.5 in windows, or java 1.4 on linux.)

Please advise on how to set smooth to false in the applet window's context. the sketch now is online at http://www.myzel.net/botcafe/applet.html - it also sets the undocumented g.smooth to false, to no avail.

Thank you.

Peter

fry

Re: scale smooth or fast
Reply #3 - Dec 3^rd, 2006, 9:06pm

i don't scale the image via getScaledInstance() (unnecessary overhead), so that route won't work. the problem is that apple has chosen to always smooth images in java2d by default in their java2d implementation (think different!)

i assume that this is a matter of tweaking a renderinghint somewhere, though some google digging turned up nothing for me. i would consider the windows/linux implementation correct.. according to this:
http://developer.apple.com/documentation/Java/Conceptual/JavaPropVMInfoRef/Articles/JavaSystemProperties.html#//apple_ref/doc/uid/TP40001975-DontLinkElementID_6
a system property might have some effect, but that seems excessive, and setProperty() may even throw a security exception in an applet (wee!)

if anyone has any clues on this one, they'd be most appreciated.

fry

Re: scale smooth or fast
Reply #4 - Dec 3^rd, 2006, 9:25pm

found it, will make the change for 0124. in the meantime, you can use this:

Graphics2D g2 = ((PGraphicsJava2D)g).g2;

g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);

for 0124, i'll switch between nearest neighbor and bicubic on smooth() and noSmooth(), so that should make it consistent between platforms.

hungerburg YaBB Newbies Offline Posts: 21	Re: scale smooth or fast Reply #5 - Dec 4^th, 2006, 1:16pm Thank you, fry! You are the best - setting the hint works perfectly. The incredible amount of polish makes processing shine - so a little light falls onto my feeble sketches too Peter

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