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| 2 questions about antialiasing |
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Frank Drebin
Member #2,987
December 2002
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Guys, I've got 2 questions about antialiasing alias multisampling in Allegro 5: 1) I got a quite decent video card. However, if I suggest to use 8 ALLEGRO_SAMPLES after initializing the display I get only 3. In 3D games my card supports up to 8x or even 16x antialiasing. Why is this? 2) Is there a way to use antialiasing on rotated sprites e.g. a smiley bitmap or do I have to use drawing primitives instead of a sprite? |
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Edgar Reynaldo
Major Reynaldo
May 2007
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Hey Frank, I don't know much, but I think multi-sampling only applies to primitives. I don't know why you're getting back 3 for the number of samples. Try taking a look a allegro.log in the scoring section for the display. It lists each mode it tries and rejects. You could try ALLEGRO_REQUIRE but that will fail if it can't match exactly. As for drawing your sprites, you can filter it with ALLEGRO_MAG_LINEAR or ALLEGRO_MIN_LINEAR. ALLEGRO_MIN_LINEAR definitely looks better when reducing an image. Enlarging with ALLEGRO_MAG_LINEAR doesn't help much though, just makes it look blurry. That's about all I know about multisampling and antialiasing with allegro. SiegeLord might know more. My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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Frank Drebin
Member #2,987
December 2002
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Thanks Edgar! I'll try looking at allegro.log to find out more... I miss the old times when you had about 5 comments to your question instantly ... |
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Edgar Reynaldo
Major Reynaldo
May 2007
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Frank Drebin said:
I miss the old times when you had about 5 comments to your question instantly ...
I wrote a small debugging guide which includes directions on how to produce an allegro.log file here : https://github.com/liballeg/allegro_wiki/wiki/Debugging-and-logging-with-A5 My Website! | EAGLE GUI Library Demos | My Deviant Art Gallery | Spiraloid Preview | A4 FontMaker | Skyline! (Missile Defense) Eagle and Allegro 5 binaries | Older Allegro 4 and 5 binaries | Allegro 5 compile guide |
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