On 27/03/2021 15:46, Alexander Dyagilev wrote:
If I enable mipmap, it looks much better comparing to original variant, but still worse comparing to the final one (described in my original posting). I can provide you all the screenshots if you want to.
I can only entertain that mipmapping in your case is going to use trilinear interpolation (*) between the 32x32 and the 16x16 mip. And, for your particular image ("artwork" / "icon"), that is giving you worse results than a 27x27 image scaled directly from the source via bilinear interpolation.
There's not much to do about this:* mipmapping allows you to keep a good visual quality if the displayed size of the image changes * sourceSize allows you to get a good scaled-down version and save on memory, but will look awful if now you try to make the image bigger again
(*) didn't check the actual code, just assumed a GL_LINEAR_MIPMAP_LINEAR setting.
HTH, -- Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB (France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com KDAB - The Qt, C++ and OpenGL Experts
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