Michael, I've written a whole lot of OpenGL demos (demoscene) using both C and Pascal. I can tell you there is a huge difference between the Delphi image decompression performance and the performance of the image libs ones provided by the OS (WIC and Quartz especially). The OS imaging libs are orders of magnitudes faster than TFPImage, especially when it comes to loading 100s of textures during the start of a demo or game. Speed aside, all the OS imaging libs also provide vastly superior image manipulation including scaling, blending, and all support matrix color operations on pixels.
I find it ridiculous to reinvent a worse version the wheel in Pascal. Yeah sure I love Pascal, but mostly for the friendly wrappers it creates out of everything, which was how Delphi started. Button.Caption := 'Hello World'; See: http://www.getlazarus.org/language/pme/
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