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Re: drawImage() really slow on Leopard
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Re: drawImage() really slow on Leopard


  • Subject: Re: drawImage() really slow on Leopard
  • From: Galen Rhodes <email@hidden>
  • Date: Tue, 26 Feb 2008 20:11:10 -0500

Yes, they switched from the Quartz rendering pipeline to the Sun rendering pipeline and the performance sucks. I've already posted a bug report to Apple about it.

In the meantime switch to the Quartz rendereing pipeline with the following command line switch:

	-Dapple.awt.graphics.UseQuartz=true

--
Galen Rhodes
email@hidden
http://www.photoyoda.com
http://www.myspace.com/woexpert




On Feb 26, 2008, at 7:37 PM, Miguel Arroz wrote:

Hi!

 I have the following code to downscale images:

// Do the scaling
BufferedImage reducedImage = new BufferedImage(newX, newY, BufferedImage.TYPE_INT_RGB);
Graphics2D g = reducedImage.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);

NSLog.out.appendln("Drawing image with original dimensions " + originalImage.getWidth() + ", " + originalImage.getHeight()
+ " with size " + newX + ", " + newY ); */

g.drawImage(originalImage, 0, 0, newX, newY, 0, 0, originalImage.getWidth(), originalImage.getHeight(), null);
g.dispose();


The log is: INFO 00:27:16 (NSLog :38) -Drawing image with original dimensions 3072, 2304 with size 267, 200

This took about a second to process in my Powerbook on Tiger. I migrated to Leopard, and this is taking... well... forever. I waited several minutes and it's still sucking up my CPU. Shark says it's taking a lot of time in color conversion stuff:

<pastedGraphic.png>

I have no ideia why. It's the same image and the same code. Only the OS has changed. Another Leopard bug?

 Any ideias?

 Yours

Miguel Arroz

Miguel Arroz
http://www.terminalapp.net
http://www.ipragma.com



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