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Forums » Prof-UIS General Discussion » How to rotate PNG?

Subject	Author	Date
How to rotate PNG?	Vladimir Klestinec	Aug 7, 2008 - 9:37 AM
Hello, I wonder if there is a way to rotate png image by angle? I want to make some kind of nonprogressing bar. My png file is now loaded by using resources and CExtLabel class. Thank you
Re: How to rotate PNG?	Technical Support	Aug 7, 2008 - 1:23 PM
Prof-UIS does not implement image rotation algorithms. Such algorithms are simply not needed when displaying icons and painting skin parts. Some generic image rotation approaches are described here: http://www.codeguru.com/cpp/g-m/gdi/article.php/c3693/ http://www.codeguru.com/vb/gen/vb_graphics/gdi/article.php/c10677/ You can use one of image manipulation libraries for rotating image surfaces: http://freeimage.sourceforge.net/download.html http://www.xdp.it/download.htm You can more efficiently rotate images using one of the following GDI/GDI+ replacement libraries: http://www.antigrain.com http://www.cairographics.org But really image output with rotation, scaling and any other kind of transformations/effects would be better and really more efficient if it will be implemented some hardware accelerated APIs such as DirectX or OpenGL.