Hello, All!
-
In documentation to function PgCreateVideoChannel I’ve found that: if
driver doesn’t supports overlays, return code must be ENXIO (No such device
or address) but with TNT2 driver I’ve got the EINVAL (Invalid argument). Is
that error or undocumented behavior ? -
In documentation to function PgGetVideoModeInfo described define
PgVM_MODE_CAP1_REFRESH_RAT, but when I try to use it, it appears not
declared ! Grepping photon includes I’m doesn’t find any inclusions. Maybe
this define already obsolete ? -
In documentation to function PgGetGraphicsHWCaps I’ve found misspelled
names of the PgHWCaps_t structure members in description section:
currently_available_crtc_video_ram (must be currently_available_crtc_ram)
and currently_available_non_crtc_video_ram (must be
currently_available_non_crtc_ram). -
In include file PgHLS.h I’ve found string “#define Pg_RGB_SATURATION”,
but I think must be Pg_HLS_SATURATION ? -
Starnge thing going on with detecting overlay or 2D capabilities of the
mode/graphics board:
As I understand TNT2 driver doesn’t support hardware overlays, but
PgGetGraphicsHWCaps says (test program included as attachment) my board
supports overlays. In documentation I’ve found that mean board support
overlays but not in all modes, isn’t it ? But I test ALL modes with all bpp,
no one mode doesn’t supports overlays (PgGetVideoModeInfo always says
overlays doesn’t supported) ! The same things with 2D acceleration. Why
PgGetGraphicsHWCaps lies to me ?
One more intresting thing: S3 Savage 4 board have the same behavior as I
written above, i.e. mode doesn’t supports overlay (according to
PgGetVideoModeInfo), but when I create video channel and checking
capabilities of overlay formats I’ve found that S3 Savage4 board supports
YUY2 and UYVY overlay types and its works for me !
Too many variances and incomprehensiblies for me 
Is there available real documentation about driver, board and its HW
capabilities ?
Thanks !
With best regards, Mike Gorchak.
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