[Bug 20164] Icons incorrectly rendered in RSTAB

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=20164





--- Comment #11 from max at veneto.com  2009-10-13 18:03:05 ---
(In reply to comment #10)
> Version 7 doesn't have the issue. If you can please analyze the code a bit and
> figure out where it goes wrong. In short all the function does is copying data
> from a source pixmap (which has an associated xrender picture) to a
> destination. Either something is wrong with masking or perhaps as you say with
> offsets.
> 
> Roderick

Just adding some fixme printouts, it repeats this pattern :

fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------- START
----------------------
trace:xrender:X11DRV_XRender_GetSrcAreaStretch src depth=24 widthSrc=176
heightSrc=15 xSrc=0 ySrc=0
trace:xrender:X11DRV_XRender_GetSrcAreaStretch dst depth=1 widthDst=176
heightDst=15 xDst=0 yDst=0
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------Depth of no use

-------- SOME USELESS STUFFS -------

fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------- START
----------------------
trace:xrender:X11DRV_XRender_GetSrcAreaStretch src depth=1 widthSrc=16
heightSrc=15 xSrc=0 ySrc=0
trace:xrender:X11DRV_XRender_GetSrcAreaStretch dst depth=24 widthDst=16
heightDst=15 xDst=0 yDst=0
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------Converting mono
to color
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------END
trace:xrender:get_xrender_format Returning wxr_format=0
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------- START
----------------------
trace:xrender:X11DRV_XRender_GetSrcAreaStretch src depth=1 widthSrc=16
heightSrc=15 xSrc=16 ySrc=0
trace:xrender:X11DRV_XRender_GetSrcAreaStretch dst depth=24 widthDst=16
heightDst=15 xDst=16 yDst=0
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------Converting mono
to color
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------END
trace:xrender:get_xrender_format Returning wxr_format=0
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------- START
----------------------
trace:xrender:X11DRV_XRender_GetSrcAreaStretch src depth=1 widthSrc=16
heightSrc=15 xSrc=32 ySrc=0
trace:xrender:X11DRV_XRender_GetSrcAreaStretch dst depth=24 widthDst=16
heightDst=15 xDst=32 yDst=0
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------Converting mono
to color
fixme:xrender:X11DRV_XRender_GetSrcAreaStretch ----------------END

and so on.... 
So, it seems it takes a very wide bitmap (presumably containing many icons in
an horizontal strip, in 24 bit/color, convert to a 1bpp, and then uses the 1bpp
to output the single icons.
The 24 to 1 conversion is not handled by your code, the 1 to 24 are... maybe
the problem lies there.

Ciao

Max

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