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GIF v PNG
GIF v PNG
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GIF v PNG
appleshaw
Posted Sunday, June 26, 2005
-
Post #7035
Grand Master
Customers
Important Contributors
FamilyTrees.GenoPro.com
GenoPro version: 3.1.0.1
Last Login: 2 hours ago
Posts: 1,584,
Visits: 31,753
I have noticed recently increasing use of PNG files where you used to see GIFs. I remember this was driven by a large
company
claiming copyright on the GIF standard.
The base
reference
here is http://www.w3.org/
Graphics
/PNG/ and more
information
is at http://www.libpng.org/pub/png/slashpng-1999.html
This latter
article
(dated 2000) does contain this statement "The patent issue is largely history, except to shareware and freeware authors, for whom it's still quite real--Unisys lawyers continue their apparent crusade to kill all low-cost GIF-supporting software." So it may be history now but use of PNG would avoid any possible problems. The article also
states
that both Netscape & IE have supported PNG since version 4 (in both cases) so it should not cause any problems - but that is what
Beta
testing is
about
.
GenoProSupport
Posted Thursday, August 18, 2005
-
Post #7036
Legendary Master
Administrators
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Gamma
FamilyTrees.GenoPro.com
Translator
GenoPro version: 3.1.0.1
Last Login: Thursday, January 16, 2025
Posts: 4,886,
Visits: 22,775
GenoPro is already capable to generate .PNG files. The old
report generator
was capable to store a
picture
witin an RTF (Rich-Text Format) document. The preferred format to store an image within an RTF file is to convert that image (GIF, BMP) to PNG. This is what Microsoft Word does. For details, visit
RTF Picture Specifications
from MSDN.
Eventually I want GenoPro to be capable to include small portions of a genealogy tree within the report. I think I will go with .GIF format because GIF does support transparency. PNG does also support transparency with an alpha channel, but I have not seen applications supporting it. Internet Explorer 6.0 still does not support the alpha channel of the PNG. You can
test your browser to see if it does support transparent PNGs
at
http://www.w3.org/Graphics/PNG/inline-alpha-table
.
The Unisys patent has finally expired, so we can use GIF...
rachack
Posted Thursday, August 18, 2005
-
Post #7037
Junior Member
Forum Members
Last Login: Wednesday, August 17, 2005
Posts: 11,
Visits: 0
on firefox it's not a problem
GenoProSupport
Posted Thursday, August 18, 2005
-
Post #7038
Legendary Master
Administrators
Moderators
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Gamma
FamilyTrees.GenoPro.com
Translator
GenoPro version: 3.1.0.1
Last Login: Thursday, January 16, 2025
Posts: 4,886,
Visits: 22,775
on firefox it's not a problem
Thanks for the info. On Opera 7, the alpha blending (transparency) is working flawlessly, however there are far too many users using Internet Explorer to ignore this problem :evil:.
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