wined3d: Use backup swapchain DC for devices created with desktop window. (try 2)

[Jeff Cook]

Hello

Is there a status update on this patch? I am curious to know if it
will be merged, and if not, what correction is needed to make it
mergeable.

Thanks
Jeff

On Mon, Sep 3, 2012 at 1:51 PM, Adam Jakubek <ajakubek at gmail.com> wrote:
> On Mon, Sep 3, 2012 at 6:29 PM, Stefan Dösinger <stefandoesinger at gmx.at>
> wrote:
>>
>> I skimmed bug #18490, and I'm wondering about two things: Does the app
>> create
>> a D3DDEVTYPE_REF or D3DDEVTYPE_NULLREF device? Once the device is created,
>> what does it to with it? A +d3d log would provide some answers.
>
>
> Ok, this needs a little correction on my part. The game actually creates
> D3DEVTYPE_HAL (I somehow previously concluded it wouldn't work, since on my
> test machine it required software vertex processing).
> Here is the relevant log line:
> trace:d3d:wined3d_device_create wined3d 0x235ce558, adapter_idx 0,
> device_type 0x1, focus_window 0x20026, flags 0x22, device_parent 0x2284cc0c,
> device 0x2284cc14.
>
> Focus window is the desktop handle. Presentation parameters specify windowed
> mode and hDeviceWindow=NULL, so in the end it uses the desktop window.
>
> It seems to be some kind of short-lived auxiliary device for texture
> operations. It's not used for rendering at all.
> The only operations on that device I could find is a series of CreateTexture
> calls:
> trace:d3d9:d3d9_device_CreateTexture iface 0x2284cc08, width 2048, height
> 2048, levels 1, usage 0, format 0x15, pool 0x2, texture 0x33be40,
> shared_handle (nil).
>
> They are followed by several LockRect/UnlockRect calls, after which the
> textures are released.
> The device is released immediately after that.
>
> Originally I suspected this might be used to generate mip-maps or load
> textures with d3dx, but the presence of D3DPOOL_SYSTEMMEM excludes both.
>
> I admit that it's a very non-standard way of creating a D3D device, since it
> can't render anything. However it seems to work for this particular use
> case.
>
> Regards,
> Adam Jakubek
>
>
>
>