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LibGfx: Add scaffolding for a webp decoder

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At the moment, this processes the RIFF chunk structure and extracts
the ICCP chunk, so that `icc` can now print ICC profiles embedded
in webp files. (And are image files really more than containers
of icc profiles?)

It doesn't even decode image dimensions yet.

The lossy format is a VP8 video frame. Once we get to that, we
might want to move all the image decoders into a new LibImageDecoders
that depends on both LibGfx and LibVideo. (Other newer image formats
like heic and av1f also use video frames for image data.)
This commit is contained in:
Nico Weber 2023-02-23 22:37:08 -05:00 • committed by Linus Groh
parent 4bf639b635
commit f7e152d049
7 changed files with 359 additions and 0 deletions
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3
Userland/Libraries/LibCore/MimeData.cpp
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@ -73,6 +73,8 @@ StringView guess_mime_type_based_on_filename(StringView path)
return "image/svg+xml"sv;
if (path.ends_with(".tga"sv, CaseSensitivity::CaseInsensitive))
return "image/x-targa"sv;
if (path.ends_with(".webp"sv, CaseSensitivity::CaseInsensitive))
return "image/webp"sv;
if (path.ends_with(".md"sv, CaseSensitivity::CaseInsensitive))
return "text/markdown"sv;
if (path.ends_with(".html"sv, CaseSensitivity::CaseInsensitive) || path.ends_with(".htm"sv, CaseSensitivity::CaseInsensitive))
@ -152,6 +154,7 @@ StringView guess_mime_type_based_on_filename(StringView path)
__ENUMERATE_MIME_TYPE_HEADER(tiff_bigendian, "image/tiff", 0, 4, 'M', 'M', 0x00, '*') \
__ENUMERATE_MIME_TYPE_HEADER(wasm, "application/wasm", 0, 4, 0x00, 'a', 's', 'm') \
__ENUMERATE_MIME_TYPE_HEADER(wav, "audio/wave", 8, 4, 'W', 'A', 'V', 'E') \
__ENUMERATE_MIME_TYPE_HEADER(webp, "image/webp", 8, 4, 'W', 'E', 'B', 'P') \
__ENUMERATE_MIME_TYPE_HEADER(win_31x_archive, "extra/win-31x-compressed", 0, 4, 'K', 'W', 'A', 'J') \
__ENUMERATE_MIME_TYPE_HEADER(win_95_archive, "extra/win-95-compressed", 0, 4, 'S', 'Z', 'D', 'D') \
__ENUMERATE_MIME_TYPE_HEADER(zlib_0, "extra/raw-zlib", 0, 2, 0x78, 0x01) \