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Re: [pygame] Setting alpha with a blit?

To: pygame-users@seul.org
Subject: Re: [pygame] Setting alpha with a blit?
From: Pete Shinners <pete@shinners.org>
Date: Thu, 17 Jun 2004 21:34:19 -0700
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Jasper Phillips wrote:

the surface had a different color than the source image it was constructed
from, with the RGB values all reduced by 1 (alpha stayed at 255)...

Presumably a bug?

No, just a mathematical rounding. SDL cheats some of the math during it's alpha blended blits. So you get some color dropout like you are seeing.

References:
- [pygame] Setting alpha with a blit?
  - From: Jasper Phillips <jasper@peak.org>
- Re: [pygame] Setting alpha with a blit?
  - From: Pete Shinners <pete@shinners.org>
- Re: [pygame] Setting alpha with a blit?
  - From: Jasper Phillips <jasper@peak.org>

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