PSD: Fix parse issue of layer mask data #1777
Merged
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Some PSD files failed to open. I fixed the problem of the PSDInput::load_layer.
Description
The length of the layer mask data was assumed to be several fixed sizes, but it actually varies depending on the mask parameter flags.
We can create this kind of files by using the layer mask options. https://helpx.adobe.com/in/photoshop/using/masking-layers.html#adjust_mask_opacity
Tests
I added new test source which caused the issue to the psd testsuite.
Checklist:
have previously submitted a Contributor License Agreement
(individual, and if there is any way my
employers might think my programming belongs to them, then also
corporate).
(adding new test cases if necessary).