Re: GD Anti Aliasing

I think the key to getting Anti Alias to work is (from the docs):

When using palette-based images, be sure to allocate a broad spectrum 
+of colors in order to have sufficient colors for the antialiasing to 
+use
[download]

That is, if you also allocate:

my $grey = $gd->colorAllocate(130,130,130);
my $grey1 = $gd->colorAllocate(32,32,32);
my $grey2 = $gd->colorAllocate(64,64,64);
my $grey3 = $gd->colorAllocate(190,190,190);
[download]

then you'll find that you get some Anti Aliasing. I'm not sure that you'll be able to actually *see* the difference, but a Digest::MD5 of the output files should reveal that the output has in fact changed. (At least that's what I'm finding on perl-5.8 on Win32.)

Cheers,
Rob

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Re^2: GD Anti Aliasing by BrowserUk (Patriarch) on Jan 15, 2009 at 10:40 UTC
All that will have changed is that you've added 4 entries to the palette. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]
Re^3: GD Anti Aliasing by syphilis (Archbishop) on Jan 15, 2009 at 10:48 UTC
All that will have changed is that you've added 4 entries to the palette. Oh ... why does the MD5 of the output png file then change ? Cheers, Rob	[reply]
Re^4: GD Anti Aliasing by BrowserUk (Patriarch) on Jan 15, 2009 at 10:51 UTC
Because the palette is stored as a lookup table in palettised images. The presence of the 4 extra (but unused) colors causes the md5 to be different. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]
Re^5: GD Anti Aliasing by syphilis (Archbishop) on Jan 15, 2009 at 10:56 UTC