Is it normal for opengl to lower image quality?

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I'm trying to make an old game look a bit better, it uses opengl version 1.1, as you can see, this in a comparison between how the image looks on photoshop vs how it looks ingame.

enter image description here

As you can see on the right (ingame) the borders are blurry, not as sharp as the original image. (Please ignore all the text).

Is this expected because of the old version of opengl? Or is it something that could be fixed?

opengl c++
1 Answers

It looks like you have some sort of filtering enabled on your texture. Look for GL_LINEAR in your code and replace it with GL_NEAREST

glBindTexture(GL_TEXTURE_2D, texBuff);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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