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I would like to use OpenGL to downsize images, using shaders. I would be very grateful, if somebody can give me a sample program in C++, which loads bitmap texture, draws it to the entire screen and allows to apply GLSL vertex/fragment shaders.

I just need a template to start with. Please

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Why do you think you need shaders just to down sample an image? Just rendering the texture on a "full screen" quad to an FBO of the desired size should work. – Sean Middleditch Apr 24 at 21:39
You've been on gamedev long enough that you should know that this isn't a "give me teh codez!" service. – Nicol Bolas Apr 25 at 13:20

closed as not constructive by Sean Middleditch, Anko, Jimmy, msell, bummzack Apr 25 at 7:41

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