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PNG option: save color from transparency

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PNG option: save color from transparency devvv 25 Sep 19:32
  PNG option: save color from transparency Joao S. O. Bueno Calligaris 25 Sep 19:55
devvv
2006-09-25 19:32:49 UTC (over 18 years ago)

PNG option: save color from transparency

Hi,

Can anyone tell me what the option "save color from transparency" exactly does when i save a png-file? I don't know the exact english text which appears here but i guess everyone knows of which option I'm talking about.

thanks in advance, bernhard

Joao S. O. Bueno Calligaris
2006-09-25 19:55:32 UTC (over 18 years ago)

PNG option: save color from transparency

On Monday 25 September 2006 02:32 pm, devvv wrote:

[Gimp-user] PNG option: save color from transparency Date: Today 02:32:49 pm
From: devvv
To: gimp-user@lists.xcf.berkeley.edu

Message was signed with unknown key 0x8C3D7645EB4E4851. The validity of the signature cannot be verified. Status: No public key to verify the signature Hi,

Can anyone tell me what the option "save color from transparency" exactly does when i save a png-file? I don't know the exact english text which appears here but i guess everyone knows of which option I'm talking about.

When a pixel is fully transparent, it still might hold an RGB value, though invisible. This RGB value can be retrieved if the pixel is made opaque or translucent.

With this option enabled, this hidden color is written in a png file. Else, the RGB value is set to the gimp context's BG colour, and the information is lost. This allows for a smaller file size if the RGB value int the transparent areas are not flat.

thanks in advance,
bernhard

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