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Editorial Team
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Asked: 2026-05-14T19:48:32+00:00

I need to generate large images (A4 image at 200 DPI, PNG format would

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I need to generate large images (A4 image at 200 DPI, PNG format would be fine) in my compact framework application. This is impossible to do in standard way due to memory limitations (such big image will throw OOMException).

Is there any library which offers file-backed stream image generation?

Or I could generate many smaller stripes of images (each stripe representing a row of the large image) using standard Bitmap approach, but I need to merge them together afterwards – is there any method how to merge many smaller images into one large without having to instantiate large Bitmap instance (which would again cause OOM)?

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1 Answer

  1. Editorial Team

    I just made a quick basic implementation of PNG stream encoding class – it supports just 8bpp and grayscale at the moment though, but that’s enough for my scenario. It should be quite easy to extend the class to support RGB and more color depths.

    http://gist.github.com/393409

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