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color: Specify what transfer function and power curve mean

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The expectation is that the named, well-known transfer characteristics
of an image description describes that the image was encoded according
to the specification of that transfer characteristic.

Signed-off-by: Sebastian Wick <sebastian.wick@redhat.com>
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Sebastian Wick 2024-06-06 18:06:29 +02:00
parent 308826f4a5
commit 32963e9e8e
1 changed files with 7 additions and 0 deletions
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7
staging/color-management/color-management-v1.xml
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@ -835,6 +835,10 @@
Sets the transfer characteristic using explicitly enumerated named
functions.
When the resulting image description is attached to an image, the
content should be encoded and decoded according to the industry standard
practices for the transfer characteristic.
Only names advertised with wp_color_manager_v1 event supported_tf_named
are allowed. Other values shall raise the protocol error invalid_tf.
@ -852,6 +856,9 @@
the given exponent. This curve represents the conversion from electrical
to optical pixel or color values.
When the resulting image description is attached to an image, the
content should be encoded with the inverse of the power curve.
The curve exponent shall be multiplied by 10000 to get the argument eexp
value to carry the precision of 4 decimals.