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LibGfx/JPEG2000: Support reading raw jpeg2000 codestreams

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Most JPEG2000 files put the codestream in an ISOBMFF box structure
(which is useful for including metadata that's bigger than the
~65k marker segment data limit, such as large ICC profiles), but
some files just store the codestream directly, for example
https://sembiance.com/fileFormatSamples/image/jpeg2000/balloon.j2c

See https://www.iana.org/assignments/media-types/image/j2c for the
mime type.

The main motivation is to be able to use the test data in J.10 in
the spec as a test case.
This commit is contained in:
Nico Weber 2024-04-18 19:42:24 -04:00 • committed by Tim Flynn
commit 0c935f8f42
Notes: sideshowbarker 2024-07-17 10:05:47 +09:00
2 changed files with 10 additions and 3 deletions
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1
Userland/Libraries/LibCore/MimeData.cpp
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@ -115,6 +115,7 @@ static Array const s_registered_mime_type = {
MimeType { .name = "image/bmp"sv, .common_extensions = { ".bmp"sv }, .description = "BMP image data"sv, .magic_bytes = Vector<u8> { 'B', 'M' } },
MimeType { .name = "image/gif"sv, .common_extensions = { ".gif"sv }, .description = "GIF image data"sv, .magic_bytes = Vector<u8> { 'G', 'I', 'F', '8', '7', 'a' } },
MimeType { .name = "image/gif"sv, .common_extensions = { ".gif"sv }, .description = "GIF image data"sv, .magic_bytes = Vector<u8> { 'G', 'I', 'F', '8', '9', 'a' } },
MimeType { .name = "image/j2c"sv, .common_extensions = { ".j2c"sv, ".j2k"sv }, .description = "JPEG2000 image data codestream"sv, .magic_bytes = Vector<u8> { 0xFF, 0x4F, 0xFF, 0x51 } },
MimeType { .name = "image/jp2"sv, .common_extensions = { ".jp2"sv, ".jpf"sv, ".jpx"sv }, .description = "JPEG2000 image data"sv, .magic_bytes = Vector<u8> { 0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A } },
MimeType { .name = "image/jpeg"sv, .common_extensions = { ".jpg"sv, ".jpeg"sv }, .description = "JPEG image data"sv, .magic_bytes = Vector<u8> { 0xFF, 0xD8, 0xFF } },
MimeType { .name = "image/jxl"sv, .common_extensions = { ".jxl"sv }, .description = "JPEG XL image data"sv, .magic_bytes = Vector<u8> { 0xFF, 0x0A } },