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APNG Specification: Difference between revisions
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out-of-order chunk error discussion is now redundant with error handling section
Herbyderby (talk | contribs) (add a section on error handling) |
Herbyderby (talk | contribs) m (out-of-order chunk error discussion is now redundant with error handling section) |
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== Error Handling == | == Error Handling == | ||
APNG is designed to allow incremental display of frames before the entire image has been read. This implies that some errors may not be detected until partway through the animation. It is recommended that when an error is encountered decoders should discard all subsequent frames, stop the animation, and revert to displaying the placeholder image | APNG is designed to allow incremental display of frames before the entire image has been read. This implies that some errors may not be detected until partway through the animation. It is strongly recommended that when an error is encountered decoders should discard all subsequent frames, stop the animation, and revert to displaying the placeholder image. An error may be displayed to the user if appropriate. | ||
= Structure = | = Structure = | ||
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.... | .... | ||
Decoders must treat out-of-order APNG chunks as an error. APNG-aware PNG editors should restore them to correct order using the sequence numbers. | |||
== `acTL`: The Animation Control Chunk == | == `acTL`: The Animation Control Chunk == | ||