High Quality Content by WIKIPEDIA articles! Xv is a shareware program written by John Bradley to display and modify digital images under the X Window System. While popular in the early 1990s (perhaps then the dominant Unix image viewer), no official releases have been made since December 1994. Bradley was unable to negotiate the LZW licence necessary for decoding the then-popular GIF format. Until at least 2000, Bradley collected third-party updates to xv, for example support for the PNG image format. These were published as source code patches only. Additional patches are still (in 2007) created and maintained by volunteers.

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