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POImageResizer/System.Drawing and CMYK JPEGs
 

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  1. POImageResizer/System.Drawing and CMYK JPEGs
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    <p>I'm doing some simple image resizing and rotation in an ASP.NET MVC 4 project, using the ImageResizer library. The problem is that when I use it to process 32-bpp CMYK JPEG files, it fails with an ArgumentException, but only on my (Windows Server 2008 R2) server - it works fine on my (Windows Vista) laptop.</p> <p>The JPEG files in question aren't too large (700x500) or otherwise non-standard - all web browsers and Paint can open them just fine, even on the server in question itself. The JPEGs have been generated using ImageMagick, and everything works fine if I ask ImageMagick to use an RGB colorspace (<code>-colorspace sRGB</code>.)</p> <p>The weird thing is, just resizing the image works fine in all cases, but it fails if I try to resize and rotate the image on the server.</p> <p>It looks like some lower-level Win32 or GDI+ function call is what's failing here - here's the relevant part of the stack trace:</p> <pre><code>[ArgumentException: Parameter is not valid.] System.Drawing.Graphics.CheckErrorStatus(Int32 status) +1621285 System.Drawing.Graphics.DrawImage(Image image, PointF[] destPoints, RectangleF srcRect, GraphicsUnit srcUnit, ImageAttributes imageAttr, DrawImageAbort callback, Int32 callbackData) +727 System.Drawing.Graphics.DrawImage(Image image, PointF[] destPoints, RectangleF srcRect, GraphicsUnit srcUnit, ImageAttributes imageAttr) +73 ImageResizer.ImageBuilder.RenderImage(ImageState s) +763 ImageResizer.ImageBuilder.Render(ImageState s) +174 ImageResizer.ImageBuilder.Process(ImageState s) +105 ImageResizer.ImageBuilder.buildToBitmap(Bitmap source, ResizeSettings settings, Boolean transparencySupported) +276 ImageResizer.ImageBuilder.buildToStream(Bitmap source, Stream dest, ResizeSettings settings) +149 ImageResizer.ImageBuilder.BuildJob(ImageJob job) +940 ImageResizer.ImageBuilder.Build(ImageJob job) +223 </code></pre> <p>Any ideas?</p>
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    1. USNikhil Dabas
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    1. COWere you using 'rotate' or 'srotate'? GDI uses WIC internally on WS2008 R2, and seems to be loading CMYK data, but can't actually support rotate operations on it, it seems. `rotate` should work even if `srotate` (source rotate) does not.
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    2. CO@ComputerLinguist I was using srotate -- my app needed to rotate the image first, then crop it.
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    3. CO@ComputerLinguist I guess this is exactly the reason why libraries like ImageResizer exist -- to abstract away these weird bugs and quirks. Maybe you can consider updating it to handle this case.
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