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Re: Draw::DrawImageOp optimization bug [message #19401 is a reply to message #19368]

Mon, 01 December 2008 11:25

Tom1
Messages: 1216
Registered: March 2007

Senior Contributor

I looked into this problem from another aspect: I shrinked the rectangle by one pixel from each edge. This proved that in the RLE code the edges of the rectangles and sub-images are exactly accurate. What happens in XPS, is that the edges show sub-pixel level inaccuracies that are internal to the XPS. This can be very accurately visualized in XPS Viewer using 5000% zooming. So, it is not U++ fault. XPS Viewer also internally softens the rasters when zooming in, and then another set of problems arise with the rectangles and sub-images: They do not quite fit together with soft and sharp edges side-by-side.

On the other hand, the unrelated problem with uneven colors in Xerox Phaser 6200, might have something to do with color spaces being different for images and vector elements causing weird color effects. I have no proof of this, but still, the printout gets corrected when this optimization is commented out.

I suggest an option flag -- maybe even enabled by default -- for skipping the optimization for large images.

// Tom

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[Message index]

		Draw::DrawImageOp optimization bug By: Tom1 on Thu, 27 November 2008 13:52
		Re: Draw::DrawImageOp optimization bug By: mirek on Fri, 28 November 2008 08:56
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Fri, 28 November 2008 10:23
		Re: Draw::DrawImageOp optimization bug By: rylek on Fri, 28 November 2008 13:15
		Re: Draw::DrawImageOp optimization bug By: mirek on Fri, 28 November 2008 13:27
		Re: Draw::DrawImageOp optimization bug By: mirek on Fri, 28 November 2008 13:29
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Fri, 28 November 2008 13:54
		Re: Draw::DrawImageOp optimization bug By: mirek on Fri, 28 November 2008 14:27
		Re: Draw::DrawImageOp optimization bug By: mirek on Fri, 28 November 2008 21:02
		Re: Draw::DrawImageOp optimization bug By: mirek on Sat, 29 November 2008 12:54
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Mon, 01 December 2008 11:25
		Re: Draw::DrawImageOp optimization bug By: mirek on Mon, 01 December 2008 12:12
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Mon, 01 December 2008 12:49
		Re: Draw::DrawImageOp optimization bug By: mirek on Mon, 01 December 2008 12:57
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Mon, 01 December 2008 13:50
		Re: Draw::DrawImageOp optimization bug By: mirek on Mon, 01 December 2008 14:25
		Re: Draw::DrawImageOp optimization bug By: mirek on Mon, 01 December 2008 13:12
		Re: Draw::DrawImageOp optimization bug By: mirek on Mon, 01 December 2008 12:41
		Re: Draw::DrawImageOp optimization bug By: mirek on Mon, 01 December 2008 13:14
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Mon, 01 December 2008 14:37
		Re: Draw::DrawImageOp optimization bug By: mirek on Mon, 01 December 2008 14:52
		Re: Draw::DrawImageOp optimization bug By: mirek on Tue, 02 December 2008 19:15
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Tue, 02 December 2008 21:16
		Re: Draw::DrawImageOp optimization bug By: mirek on Tue, 02 December 2008 21:46
		Re: Draw::DrawImageOp optimization bug By: mirek on Wed, 03 December 2008 12:14
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Wed, 03 December 2008 15:03
		Re: Draw::DrawImageOp optimization bug By: mirek on Wed, 03 December 2008 15:21
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Wed, 03 December 2008 15:36
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Wed, 03 December 2008 17:11
		Re: Draw::DrawImageOp optimization bug By: mirek on Thu, 04 December 2008 10:22
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Thu, 04 December 2008 11:07
		Re: Draw::DrawImageOp optimization bug By: mirek on Thu, 04 December 2008 11:36
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Thu, 04 December 2008 12:09
		Re: Draw::DrawImageOp optimization bug By: mirek on Thu, 04 December 2008 12:36
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Thu, 04 December 2008 13:09
		Re: Draw::DrawImageOp optimization bug By: mirek on Thu, 04 December 2008 15:53
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Thu, 04 December 2008 16:07
		Re: Draw::DrawImageOp optimization bug By: mirek on Thu, 04 December 2008 17:46
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Fri, 05 December 2008 11:05
		Re: Draw::DrawImageOp optimization bug By: mirek on Fri, 05 December 2008 11:20
		Re: Draw::DrawImageOp optimization bug By: Tom1 on Fri, 05 December 2008 12:13
		Re: Draw::DrawImageOp optimization bug By: mirek on Thu, 04 December 2008 10:19

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