clarify that the data is after the size specified by the file size in
the header; an alternate way to read the previous statement was that the
data was after the 'WEBP' fourcc.
based on comments from:
https://datatracker.ietf.org/doc/draft-zern-webp/ballot/#draft-zern-webp_robert-wilton
Bug: webp:448
Change-Id: I7c5c5440a94cb817da51fe07d1ccf45d6af0f001
some renderers may limit output to 72 and use a 3 space indent; this
avoids overflowing into the margin
Change-Id: Iaf4e8b71be27ef00fccd1d82b79bf96c01040f10
these were intended as an extension point, but in this version of the
spec they're not defined. if they ever were used leaving them as SHOULD
could result in a source of incompatibility.
Change-Id: I1376ab7abe7d955ae335106f2faebc217dac77cd
for compatibility SHOULDs are left as is with some additional
description given of behavior if the recommendation is ignored.
Change-Id: I7a25b1a6fd9f9594390c30fce3af5ca17c3158c0
this avoids presenting it in the description of a chunk where it could
appear it was defining an element of the diagram
Change-Id: I51b2c2a0dcecb4fc130711ad37c884a434920ecd
Note the fourth character is an ASCII space to avoid confusion.
Also update the FourCC definition to mention that they're case
sensitive.
Change-Id: I87d0cbcf06e7c25bf2b33419b4c8c891adb82a8a
Use the correct number of lines for fixed width entries like
ChunkHeader(). ':' is used instead of '|' for variable length entries.
Bug: webp:546
Change-Id: I6ec60af674c0777d5ea6ae99c8aa3c7854ddd9f9
Fixed: webp:546
RFC 2119 was updated by RFC 8174; use the text from there
+ change INFORMATIVE to informative to avoid confusion with the key
words in the RFCs
Change-Id: I0a3fe9dc48d284e7ac95633896ffb855ecd1a229
... since no guarantee of Huffman coding can be introduced at decoding
time and encoding didn't actually use Huffman coding in the first place
Bug: webp:551
Change-Id: I400466bb3b4a1d5506353eb3f287d658603164ee
for recent changes to color transform, simple code length code, image
structure and details of decoding prefix codes
Bug: webp:551
Change-Id: I36a4d1ee3e25b8a56f5d926f4770374ace99bc2f
and the corresponding InverseTransform(); the operations were swapped.
The forward transform subtracts the deltas, the inverse adds them.
Bug: webp:551
Change-Id: Ieb90a24f843cee7cdfe46cbb15ec7d716ca9d269
the value of the TR-pixel on the right border is the leftmost pixel on
the current row, not the previous one
Bug: webp:551
Change-Id: I157e8c16ce43a9f52c36aa880be1be3bef19c063
Break the main README into into multiple pages in the doc/ directory,
except for the tests, swig and webp_js docs which are in the corresponding
directories.
The webp mux doc is merged into the API doc and the tools doc.
Change-Id: Ia407617dd88094f4662841d37947cfef80799914
- prefer Exif to EXIF when not referring to the chunk
- normalize use of code format for canvas / frame width & height
Change-Id: I7fc9e87baeb5d8e719274680ce621dcb078a985f
- prefer https
- metadataworkinggroup.org/com seem to be offline; the web archive link
was obtained from exiftool: https://exiftool.org/TagNames/MWG.html
- fix kramdown link, rubyforge has been gone a long time
- fix png/zlib links
Bug: webp:544
Bug: b/202302177
Change-Id: Id69de4553e7baf00393f12a2c1acb262443a1a93
to https://datatracker.ietf.org/doc/html/... the http tools.ietf.org
links redirect here sometimes, in other cases they 404.
Bug: webp:544
Change-Id: I900972070d6c5659c45a86a89e78b870f42fe5bc
unknown chunks as a group are well defined in the text
+ remove the Note about stable features as it matched the list given;
there are no WIP features for the format
Change-Id: I11a4de39f9d203b815879f0e9dea9c45b2ae6ff6
replace with more inclusive terms or remove the comment entirely if the
meaning was already clear.
Bug: webp:507
Change-Id: Ica3bbf751ebf79f6668df6e6209af770248ff4ca
the interpretation of a 0 duration depends on the implementation;
merging of multiple frames isn't guaranteed, some may enforce a minimum
duration.
BUG=webp:380
Change-Id: Idf592049d2092e4cc5cfb2e4c59ddbc91bd52f9c
