Re: CV64 in truecolor 16bit mode: strange xdvi output

[Ingolf Koch <ingolf%knuut.de@localhost>]

On Mon, Apr 14, 2036 at 03:09:29AM +0000, Ingolf Koch wrote:
> with 16bit truecolor visual (5+6+5) on a CV64, xdvi (tetex
> package) produced weird output: When grayscale dithering is
> switched on, the gray shades are displayed in purple.
> (1.4R kernel, current X).

This only happens if I do not use copy mode (with copy
mode, everything is as expected).

In non-copy mode, the new pixmap is put with the GXandInverted
function (via XPutImage()). I have verified that the source
pixmap is ok. Especially, the read components are always
equal to the blue components (gray values, 5+6+5 bits/pixel).

If the destination (before the XPutImage()) also has this
property (red comp == blue comp), it should also hold for
the destination after the operation. But xmag shows pixels
with values e.g. (0xffff,0x79e7,0xf7de).

So I think there is a bug in the X server when using the
GXandInverted function in a graphics context.

    Ingolf
-- 

Ingolf Koch     ICQ#60829470     Beste Kneipe in Jena-Ost
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