Q: Why do TTCFont Glyphs need an alpha channel?
[squeak-dev] Q: Why are TTCFont Glyphs forms of depth 32?
Hi Bert,
Thank you for your quick answer. So the next question is:
Q: Why do TTCFont Glyphs need an alpha channel? Why wouldn't just having transparent pixels suffice? When/where is this extra ability used? Can you point me to a good case?
Bert Freudenberg bert at freudenbergs.de Fri Jul 25 04:22:53 UTC 2008
***
Am 25.07.2008 um 00:16 schrieb Jerome Peace:
Hi all,
Q: Why are TTCFont Glyphs forms of depth 32?
A 32 bpp form is TSTTCPW if you want an alpha channel. An 8 bpp form would suffice, but require more exotic bitblt rules to be interpreted as an alpha channel.
- Bert -
***
Am 25.07.2008 um 11:17 schrieb Jerome Peace:
Q: Why do TTCFont Glyphs need an alpha channel? [squeak-dev] Q: Why are TTCFont Glyphs forms of depth 32? Hi Bert, Thank you for your quick answer. So the next question is: Q: Why do TTCFont Glyphs need an alpha channel? Why wouldn't just having transparent pixels suffice? When/where is this extra ability used? Can you point me to a good case? Bert Freudenberg bert at freudenbergs.de Fri Jul 25 04:22:53 UTC 2008 *** >Am 25.07.2008 um 00:16 schrieb Jerome Peace:
Hi all, >><...> >> >> Q: Why are TTCFont Glyphs forms of depth
32? >> > >A 32 bpp form is TSTTCPW if you want an alpha channel. An 8 bpp form >would suffice, but require more exotic bitblt rules to be interpreted >as an alpha channel. > >- Bert - > ***
You need alpha for the anti-aliased rendering. Look at a TT-rendered string with a magnifier morph, its edges are not made of only black pixels.
- Bert -
On 25-Jul-08, at 8:17 AM, Jerome Peace wrote:
Q: Why do TTCFont Glyphs need an alpha channel?
Anti-aliasing
tim -- tim Rowledge; tim@rowledge.org; http://www.rowledge.org/tim Useful Latin Phrases:- Magister Mundi sum! = I am the Master of the Universe!
squeak-dev@lists.squeakfoundation.org
-
Bert Freudenberg -
Jerome Peace -
tim Rowledge