Backup of GifOverlay (No. 4)

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• Go to GifOverlay.
  • 1 (2008-09-18 (Thu) 18:09:48)
  • 2 (2008-09-18 (Thu) 20:39:29)
  • 3 (2008-09-19 (Fri) 01:06:09)
  • 4 (2008-09-19 (Fri) 02:56:44)

policy

• http://giflib.cvs.sourceforge.net/giflib/giflib/util/gifovly.c inspire
  • i want to commit GIF89a extend gifovly.c as gifovly2.c
• GIF Overlay for PHP (gifovly)

function

• image overlay likely gifovlty.c but GIF89a extended.
  • transparent overlapping
  • join GIF animation frame timeline

spec

• accept different frame count each GIF image
  • lcm frame animation generated.
• loop each frame count each GIF image

implementation

• split GIF image to frame
• all frame lcm calculation
• frame overlay with timeline t mod F{i} (t=timeline, F=frame count, i=image num)
• clip screen and dispose = true

relative

• GIF Overlay for PHP (gifovly)