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Possible c++ image scaleing in opengl

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When I say "quality", I refer to "resolution".

When you scale an image up, you do not gain the extra resolution that is required to make it look good once it's bigger (as in - it will look pixelated).

You have to have the extra resolution there to begin with.

This is the case for scaling up any image (in OpenGL or otherwise).

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You may want to change texure magnifiction and minifiction modes like this:


glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);


Texture will look a bit blurred in extreme cases, however, it won't look pixelized - and that's probably what you want to achieve.

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