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Commit d39dfbfe changes lz magic to be always treated as LE when encoded.
Runtime conversion from a string to uint32 is storing the magic with the same
endianness on both LE and BE machines. This requires aditional byte swap
when sending magic between LE/BE machines.
Changing lz magic to a constant will ensure, that it will be always stored in
native endianness, and the second byte swap won't be needed.
This commit reverts d39dfbfe changes in lz.c while keeping the rest.
They will be needed in future commit for quic.c
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In addition to Laszlo's commit fixing rhbz#928973, we can add
some compile-time assertion to lz_common.h to help catch similar
bugs in the future.
This uses gnulib's verify.h to make sure at compile-time that
the various constant arrays used in lz_common.h are of the expected
size.
I've checked that before Laszlo's patch, the assert triggers, and
that it's gone after it.
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The IS_IMAGE_TYPE_PLT and IS_IMAGE_TYPE_RGB arrays are supposed to decide
whether each image type is PLT or RGB. Dependent on the result, one of the
PLT_PIXELS_PER_BYTE and RGB_BYTES_PER_PIXEL arrays can be indexed.
Commit c0b048eb introduced the LZ_IMAGE_TYPE_A8 enum constant and grew the
RGB_BYTES_PER_PIXEL array by one element, but it missed to append a zero
to IS_IMAGE_TYPE_PLT, and a one to IS_IMAGE_TYPE_RGB. Do so now.
Related RHBZ: 928973.
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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This format is needed to add Render support to the X driver, so we
need the ability to compress and decompress it.
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Since some spice C++ code is using code from common/, the C
functions need to be marked as such for the C++ compiler, otherwise
we'll get linkage issues.
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The RGB channels are compressed using JPEG.
The alpha channel is compressed using LZ.
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