[Xcb] Recent fixes for bitmap conversions

[Peter Harris]

Peter Harris wrote:
> Ulrich Eckhardt wrote:
>> The attached program creates a 100x100 pixel window and excludes a pixmap from 
>> its shape.
> 
> Thanks for the test.
> 
> I can confirm that xcb_image is still broken. Among other things, it
> doesn't account for servers where image_byte_order != image_bit_order.

Err, no, that's not it. But it does swap bytes incorrectly.

> I'm going to poke at it a bit, and let the list know what I come up with.

Still poking.

Peter Harris
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