[Bug 55672] New: [Feature Request] Add an option to change the Texel Alignment for older D3D games

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55672

Bug ID: 55672
           Summary: [Feature Request] Add an option to change the Texel
                    Alignment for older D3D games
           Product: Wine
           Version: 8.16
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: d3d
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Many older games relied on that option set to "0" to display textures properly,
some that come to mind are Need for Speed III through Porsche Unleashed.
Without it set properly, you get seams in textures and everything looks blurry.
In Porsche Unleashed the effect is more drastic as the car windows don't
actually shatter when your car flips over like they are supposed to when this
setting is correct.

Comparison pics:

Texel 0:
https://drive.google.com/file/d/1PJm4mUPdpw-c08ZL-wH-T68PVBouxJsN/view?usp=d...

Texel 3:
https://drive.google.com/file/d/1_UEZmAN3-4Dam1vCGZXjYCIXoufFjwNd/view?usp=d...

[Bug 55672] [Feature Request] Add an option to change the Texel Alignment for older D3D games

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55672

Zeb Figura  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #1 from Zeb Figura  ---
Sorry, I'm confused, what does "texel alignment" refer to here?

[Bug 55672] [Feature Request] Add an option to change the Texel Alignment for older D3D games

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55672

--- Comment #2 from PlayNeth  ---
(In reply to Zeb Figura from comment #1)
> Sorry, I'm confused, what does "texel alignment" refer to here?

I'm bad at explaining these things so I'll quote ddrawcompat's wiki on github: 
"Direct3D 9 and older versions have the (0, 0) pixel coordinate at the center
of the top-left pixel instead of at the top-left corner of it. Therefore,
applications should shift their vertex coordinates by a half pixel when trying
to render a textured quad with perfect 1:1 texel-to-pixel mapping. Refer to the
Directly Mapping Texels to Pixels (Direct3D 9) article of the Windows API
documentation for details.

Unfortunately, many old applications didn't get this right, causing various
display glitches, such as horizontal or vertical lines around sprite edges, or
hard to read text. Resolution scaling, antialiasing and texture filtering
overrides can make this issue worse."

It boils down to a texture misalignment as some early D3D games expected a
value other than 0 (usually 3) which is the D3D9 standard, back in the day
drivers usually would you let you adjust that option accordingly if you notice
something odd in games and that would fix it in most cases

[Bug 55672] Allow offsetting ddraw texture sampling coordinates (equivalent of "Texel Alignment" / "Texel Origin Adjustment" driver workaround)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55672

Zeb Figura  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
            Summary|[Feature Request] Add an    |Allow offsetting ddraw
                   |option to change the Texel  |texture sampling
                   |Alignment for older D3D     |coordinates (equivalent of
                   |games                       |"Texel Alignment" / "Texel
                   |                            |Origin Adjustment" driver
                   |                            |workaround)
           Severity|normal                      |enhancement

--- Comment #3 from Zeb Figura  ---
Thanks, I think I understand the issue here.