This is part of Family API which allow to create dual-os version of program runs under OS/2 and DOS
Note: This is legacy API call. It is recommended to use 32-bit equivalent
This call performs one of the following functions; set palette registers, sets the overscan (border) colour, set the blink/background intensity switch, set color registers, set the underline location, or set the target VioSetMode display configuration.
VioSetState (RequestBlock, VioHandle)
The six structures, depending on request type, are:
Applies to | length (USHORT) - input : Length of structure, including length. | reqtype (USHORT) - input | ||
---|---|---|---|---|
VIOPALSTATE | EGA, VGA, or IBM Personal System/2 Display Adapter | 38 - Maximum valid value | Request type 0 for palette registers | palette (USHORT) - input: First palette register in the palette register sequence; must be specified in the range 0 through 15. The palette registers are returned in sequential order. The number returned is based upon length. |
color (USHORT*(length-6)/2) - input : Color value for each palette register. The maximum number of entries in the color value array is 16 | ||||
VIOOVERSCAN | CGA, VGA, or IBM Personal System/2 Display Adapter | Only valid value. | Request type 1 for overscan (border) color. | Color value. |
VIOINTENSITY | CGA, EGA, MCGA, VGA, or IBM Personal System/2 Display Adapter | Only valid value. | Request type 2 for blink/background intensity switch. | switch (USHORT) - input : Switch set as: |
0 - Blinking foreground colors enabled. | ||||
1 - High intensity background colors enabled. | ||||
VIOCOLORREG | VGA, or IBM Personal System/2 Display Adapter | 12 - Only valid value. | Request type 3 for color registers. | first color (USHORT) - input : First color register to set in the color register sequence; must be specified in the range 0 through 255. The color registers are set in sequential order. |
number color (USHORT) - input : Number of color registers to set; must be specified in the range 1 through 256. | ||||
datarea (PCH) - input : Far address of a data area containing one three-byte entry for each color register to be set. The format of each entry is as follows: | ||||
Byte 1 - Red value | ||||
Byte 2 - Green value | ||||
Byte 3 - Blue value | ||||
VIOSETULINELOC | EGA, VGA, or IBM Personal System/2 Display Adapter | Only valid value. | Request type 5 to set the scan line for underlining. Underlining is enabled only when the foreground color is 1 or 9. | scanline (USHORT) - input : Scan line minus 1. Values of 0 through 31 are acceptable. A value of 32 means underlining is disabled. |
VIOSETTARGET | Only valid value. | Request type 6 to set display configuration to be the target of the next VioSetMode. | :select (USHORT) - input : Configuration: | |
0 - Default selection algorithm. See VioSetMode. | ||||
1 - Primary | ||||
2 - Secondary |
;rc (USHORT) - return:Return code descriptions are: *0 NO_ERROR *355 ERROR_VIO_MODE *421 ERROR_VIO_INVALID_PARMS *436 ERROR_VIO_INVALID_HANDLE *438 ERROR_VIO_INVALID_LENGTH *465 ERROR_VIO_DETACHED *494 ERROR_VIO_EXTENDED_SG
Request type = 6, Set Target VioSetMode Display Configuration, and request type = 5, Set Underline Location, are not supported in the family API.
Some options operate differently in the DOS mode than in the OS/2 mode. Therefore, the following considerations applies to VioSetMode when coding for the DOS mode:
typedef struct _VIOPALSTATE { USHORT cb; /* Length of this structure in bytes */ USHORT type; /* Request type=0 get palette registers */ USHORT iFirst; /* First palette register to return */ USHORT acolor[1]; /* Color value palette register */ }VIOPALSTATE; typedef VIOPALSTATE far *PVIOPALSTATE; typedef struct _VIOOVERSCAN { USHORT cb; /* Length of this structure */ USHORT type; /* Request type=1 get overscan (border) color */ USHORT color; /* Color value */ }VIOOVERSCAN; typedef VIOOVERSCAN far *PVIOOVERSCAN; typedef struct _VIOINTENSITY { USHORT cb; /* Length of this structure */ USHORT type; /* Request type=2 get blink/background intensity switch */ USHORT fs; /* Value of blink/background switch */ }VIOINTENSITY; typedef VIOINTENSITY far *PVIOINTENSITY; typedef struct _VIOCOLORREG { /* viocreg */ USHORT cb; USHORT type; USHORT firstcolorreg; USHORT numcolorregs; PCH colorregaddr; }VIOCOLORREG; typedef VIOCOLORREG far *PVIOCOLORREG; typedef struct _VIOSETULINELOC { /* viouline */ USHORT cb; USHORT type; USHORT scanline; }VIOSETULINELOC; typedef VIOSETULINELOC far *PVIOSETULINELOC; typedef struct _VIOSETTARGET { /* viosett */ USHORT cb; USHORT type; USHORT defaultalgorithm; }VIOSETTARGET; typedef VIOSETTARGET far *PVIOSETTARGET; #define INCL_VIO USHORT rc = VioSetState(RequestBlock, VioHandle); PVOID RequestBlock; /* Request block */ HVIO VioHandle; /* Video handle */ USHORT rc; /* return code */
VIOPALSTATE struc viopal_cb dw ? ;Length of this structure in bytes viopal_type dw ? ;Request type=0 get palette registers viopal_iFirst dw ? ;First palette register to return viopal_acolor dw 1 dup (?) ;Color value palette register VIOPALSTATE ends VIOOVERSCAN struc vioos_cb dw ? ;Length of this structure vioos_type dw ? ;Request type=1 get overscan (border) color vioos_color dw ? ;Color value VIOOVERSCAN ends VIOINTENSITY struc vioint_cb dw ? ;Length of this structure vioint_type dw ? ;Request type=2 get blink/background ; intensity switch vioint_fs dw ? ;Value of blink/background switch VIOINTENSITY ends VIOCOLORREG struc viocreg_cb dw ? ; viocreg_type dw ? ; viocreg_firstcolorreg dw ? ; viocreg_numcolorregs dw ? ; viocreg_colorregaddr dd ? ; VIOCOLORREG ends VIOSETULINELOC struc viouline_cb dw ? ; viouline_type dw ? ; viouline_scanline dw ? ; VIOSETULINELOC ends VIOSETTARGET struc viosett_cb dw ? ; viosett_type dw ? ; viosett_defaultalgorithm dw ? ; VIOSETTARGET ends EXTRN VioSetState:FAR INCL_VIO EQU 1 PUSH@ OTHER RequestBlock ;Request block PUSH WORD VioHandle ;Video handle CALL VioSetState Returns WORD