APNG Specification: Revision history

29 May 2025

• curprev 21:5321:53, 29 May 2025‎ Tantek talk contribs‎ 16,888 bytes +138‎ note main metabug

22 May 2025

• curprev 00:3900:39, 22 May 2025‎ Tantek talk contribs‎ 16,750 bytes +146‎ historical page, see W3C spec

26 September 2015

• curprev 10:0210:02, 26 September 2015‎ Annevk talk contribs‎ 16,604 bytes +84‎ Mention the image/apng MIME type

1 June 2012

• curprev 18:0718:07, 1 June 2012‎ Jwein talk contribs‎ 16,520 bytes +141‎ →‎`fcTL`: The Frame Control Chunk

9 June 2010

• curprev 23:0523:05, 9 June 2010‎ Tantek talk contribs‎ 16,379 bytes +62‎ add link to tests from Philip

24 March 2010

• curprev 23:0823:08, 24 March 2010‎ Andrew talk contribs‎ 16,317 bytes 0‎ No edit summary

14 August 2008

• curprev 10:1310:13, 14 August 2008‎ Pabouk talk contribs‎ m 16,317 bytes +27‎ corrected links and a typo

28 January 2008

• curprev 06:4606:46, 28 January 2008‎ BrotherBrendan talk contribs‎ 16,290 bytes +73‎ →‎A. References

24 September 2007

• curprev 07:2007:20, 24 September 2007‎ Andrew talk contribs‎ 16,217 bytes −97‎ No edit summary

20 September 2007

• curprev 21:4321:43, 20 September 2007‎ Andrew talk contribs‎ 16,314 bytes −7‎ No edit summary

3 August 2007

• curprev 20:4220:42, 3 August 2007‎ Andrew talk contribs‎ 16,321 bytes +15‎ No edit summary

19 June 2007

• curprev 20:4120:41, 19 June 2007‎ Andrew talk contribs‎ 16,306 bytes −333‎ removed notice about renaming chunks

11 June 2007

• curprev 14:1914:19, 11 June 2007‎ Andrew talk contribs‎ 16,639 bytes +208‎ →‎Test Encoder and Sample Images

5 April 2007

• curprev 19:1719:17, 5 April 2007‎ Andrew talk contribs‎ 16,431 bytes +3‎ →‎Structure
• curprev 17:5517:55, 5 April 2007‎ Andrew talk contribs‎ 16,428 bytes −178‎ No edit summary
• curprev 17:0817:08, 5 April 2007‎ Herbyderby talk contribs‎ m 16,606 bytes +136‎ Clarify frame skipping
• curprev 16:0616:06, 5 April 2007‎ Herbyderby talk contribs‎ 16,470 bytes +310‎ Remove restrictions on first fcTL by making clearing mandatory
• curprev 15:4915:49, 5 April 2007‎ Herbyderby talk contribs‎ m 16,160 bytes −6‎ One editorial change from pnglist I missed
• curprev 15:4715:47, 5 April 2007‎ Herbyderby talk contribs‎ 16,166 bytes −134‎ Remove oFFs line as per pnglist discussion
• curprev 15:4315:43, 5 April 2007‎ Herbyderby talk contribs‎ 16,300 bytes +246‎ Clarify that frame timings are independent of decoding time
• curprev 15:3915:39, 5 April 2007‎ Herbyderby talk contribs‎ m 16,054 bytes +66‎ Minor editorial changes suggested on pnglist

31 March 2007

• curprev 23:1423:14, 31 March 2007‎ Andrew talk contribs‎ 15,988 bytes −90‎ No edit summary

30 March 2007

• curprev 06:1106:11, 30 March 2007‎ Herbyderby talk contribs‎ m 16,078 bytes +3‎ fix typos
• curprev 02:3902:39, 30 March 2007‎ Andrew talk contribs‎ 16,075 bytes +90‎ clarified that hidden frame still counted in num_frames

29 March 2007

• curprev 18:5618:56, 29 March 2007‎ Andrew talk contribs‎ 15,985 bytes −111‎ iterations->plays
• curprev 17:3717:37, 29 March 2007‎ Andrew talk contribs‎ 16,096 bytes +67‎ No edit summary
• curprev 17:2317:23, 29 March 2007‎ Andrew talk contribs‎ 16,029 bytes +76‎ clarified num_iterations
• curprev 17:2017:20, 29 March 2007‎ Andrew talk contribs‎ 15,953 bytes +104‎ added note about frames looking same each iteration
• curprev 17:1417:14, 29 March 2007‎ Andrew talk contribs‎ 15,849 bytes +49‎ increased restriction for blend_op and dispose_op

23 March 2007

• curprev 15:4815:48, 23 March 2007‎ Herbyderby talk contribs‎ m 15,800 bytes +94‎ make explicit that the boundaries of the animation are fixed to IHDR
• curprev 15:1015:10, 23 March 2007‎ Herbyderby talk contribs‎ m 15,706 bytes +3‎ fix typos
• curprev 04:4104:41, 23 March 2007‎ Herbyderby talk contribs‎ m 15,703 bytes −43‎ Replace "placeholder image" with "default image"
• curprev 03:0903:09, 23 March 2007‎ Herbyderby talk contribs‎ 15,746 bytes +204‎ clarify that disposal happens to the output buffer before rendering the next frame
• curprev 03:0203:02, 23 March 2007‎ Herbyderby talk contribs‎ m 15,542 bytes +147‎ editorial changes
• curprev 02:5002:50, 23 March 2007‎ Herbyderby talk contribs‎ m 15,395 bytes −68‎ out-of-order chunk error discussion is now redundant with error handling section
• curprev 02:4302:43, 23 March 2007‎ Herbyderby talk contribs‎ 15,463 bytes +413‎ add a section on error handling
• curprev 02:1702:17, 23 March 2007‎ Herbyderby talk contribs‎ 15,050 bytes −326‎ OVER color type restriction does not take into account possibility of tRNS chunk, and doesn't serve any useful purpose anyway
• curprev 02:0902:09, 23 March 2007‎ Herbyderby talk contribs‎ 15,376 bytes +150‎ Move bKGD handling to canvas definition, which is where it makes the most sense.
• curprev 01:5701:57, 23 March 2007‎ Herbyderby talk contribs‎ m 15,226 bytes 0‎ Swap Structure and Terminology sections
• curprev 01:5601:56, 23 March 2007‎ Herbyderby talk contribs‎ 15,226 bytes +363‎ Describe the treatment of the placeholder image consistently
• curprev 00:1600:16, 23 March 2007‎ Pavlov talk contribs‎ 14,863 bytes 0‎ No edit summary

22 March 2007

• curprev 23:3923:39, 22 March 2007‎ Pavlov talk contribs‎ 14,863 bytes +16‎ →‎From 0.8
• curprev 23:3423:34, 22 March 2007‎ Pavlov talk contribs‎ 14,847 bytes +1‎ APNG 0.10 (tagging andrew's last set of changes)
• curprev 23:0823:08, 22 March 2007‎ Andrew talk contribs‎ 14,846 bytes +15‎ No edit summary
• curprev 23:0323:03, 22 March 2007‎ Andrew talk contribs‎ 14,831 bytes −32‎ No edit summary
• curprev 20:2120:21, 22 March 2007‎ Andrew talk contribs‎ 14,863 bytes −376‎ No edit summary

21 March 2007

• curprev 19:0419:04, 21 March 2007‎ Pavlov talk contribs‎ 15,239 bytes −334‎ APNG 0.9
• curprev 13:3213:32, 21 March 2007‎ Andrew talk contribs‎ 15,573 bytes −625‎ No edit summary
• curprev 05:4905:49, 21 March 2007‎ Andrew talk contribs‎ 16,198 bytes +42‎ No edit summary

20 March 2007

• curprev 07:3907:39, 20 March 2007‎ Pavlov talk contribs‎ 16,156 bytes +2‎ →‎Big Important Note