Re: SM501 Video

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: riki (see_my_home_at_page)
Date: 03/03/05 

Date: Fri, 04 Mar 2005 11:15:24 +1300

riki wrote:
> Dean Ramsier wrote:
>
>> The SM501 does not support hardware rotation.
>>
> From the WindowCE Drivers specs:
> "The VoyagerGX display driver supports display rotation in 90, 180, and
> 270 degree angles. However, currently Windows CE GPE classes do not
> support DirectDraw functions in rotation mode. Therefore, there is no
> hardware video support in rotation mode, only software-emulated Color
> Space Conversion blit. Also, 2D hardware acceleration features are not
> fully supported in this rotation mode, only RECTFILL and LINE. To
> enable this feature, the VoyagerGX driver must be compiled with
> SMI_ROTATION environment flag enabled (refer to Environment Options
> Appendix for more details). Applications can rotate the display
> dynamically, by calling the display driver rotation escape functions. A
> default rotation angle can be specified using Angle registry key (refer
> to Registry Settings Appendix for more detail)."
>

Just to be clear the hardware appears to support it (see the 2D Control
register) but the driver doesn't.*

* I havn't used this feature of the '501 myself :-)

riki

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