Speeding up GDI+ when Handling Large Images in c#

Question

Im using GDI+ to render images in c#.The method works fine when Medium quality images are used.But when i use High quality images with large sizes ranging from 1.5-5mb the processing seems to be much slower.I mainly use

Graphics.DrawImage

Is there any way to speed up this.Can i reduce the size of the images on the fly by compressing it in memory,Will this take more time.Any ideas

score 2 · Answer 1 · answered Jun 16 '12 at 16:09

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If not scaling the image, DrawImageUnscaled will help. Consider setting to premultiplied RGBA as well. Split the image into smaller chunks.

See here: http://www.gamedev.net/topic/467752-maximizing-gdi-speed/

answered Jun 16 '12 at 16:09

Mark Sowul

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Can you please provide some example – techno Jun 16 '12 at 16:10

score 0 · Answer 2 · edited May 23 '17 at 12:21

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There seems to have been a similar question: How to increase performance over GDI's DrawImage(Unscaled)?

That guy ended up writing his own library on top of OpenTK to really speed up things.

edited May 23 '17 at 12:21

Community

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answered Jun 16 '12 at 16:10

Marcel N.

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Speeding up GDI+ when Handling Large Images in c#

2 Answers2