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/* Written by Michael Weller and Harm Hanemaayer. */
#include <stdarg.h>
#include "vga.h"
#include "driver.h"
#include "timing.h"
#include "accel.h"
/*
* This calls one of the acceleration interface functions.
*/
int vga_accel
(unsigned operation
,...
)
{
va_list params
;
va_start(params
, operation
);
/* This is the fast interface which I thought of first: */
if (__svgalib_driverspecs
->accel
) {
int retval
;
retval
= (*(__svgalib_driverspecs
->accel
))(operation
, params
);
va_end(params
);
return retval
;
}
/* Do a quick availability check to avoid disasters. */
if (__svgalib_driverspecs
->accelspecs
== 0)
return -1;
/* Check for operation availability flag. */
if (!(__svgalib_driverspecs
->accelspecs
->operations
& (1 << (operation
- 1))))
return -1;
vga_lockvc
();
/*
* gcc doesn't produce glorious code here, it's much better with
* only one va_arg traversal in a function.
*/
switch (operation
) {
case ACCEL_FILLBOX
:
{
int x
, y
, w
, h
;
x
= va_arg(params
, int);
y
= va_arg(params
, int);
w
= va_arg(params
, int);
h
= va_arg(params
, int);
(*__svgalib_driverspecs
->accelspecs
->FillBox
) (x
, y
, w
, h
);
break;
}
case ACCEL_SCREENCOPY
:
{
int x1
, y1
, x2
, y2
, w
, h
;
x1
= va_arg(params
, int);
y1
= va_arg(params
, int);
x2
= va_arg(params
, int);
y2
= va_arg(params
, int);
w
= va_arg(params
, int);
h
= va_arg(params
, int);
(*__svgalib_driverspecs
->accelspecs
->ScreenCopy
) (x1
, y1
, x2
, y2
, w
, h
);
break;
}
case ACCEL_PUTIMAGE
:
{
int x
, y
, w
, h
;
void *p
;
x
= va_arg(params
, int);
y
= va_arg(params
, int);
w
= va_arg(params
, int);
h
= va_arg(params
, int);
p
= va_arg(params
, void *);
(*__svgalib_driverspecs
->accelspecs
->PutImage
) (x
, y
, w
, h
, p
);
break;
}
case ACCEL_DRAWLINE
:
{
int x1
, x2
, y1
, y2
;
x1
= va_arg(params
, int);
y1
= va_arg(params
, int);
x2
= va_arg(params
, int);
y2
= va_arg(params
, int);
(*__svgalib_driverspecs
->accelspecs
->DrawLine
) (x1
, y1
, x2
, y2
);
break;
}
case ACCEL_SETFGCOLOR
:
{
int c
;
c
= va_arg(params
, int);
(*__svgalib_driverspecs
->accelspecs
->SetFGColor
) (c
);
break;
}
case ACCEL_SETBGCOLOR
:
{
int c
;
c
= va_arg(params
, int);
(__svgalib_driverspecs
->accelspecs
->SetBGColor
) (c
);
break;
}
case ACCEL_SETTRANSPARENCY
:
{
int m
, c
;
m
= va_arg(params
, int);
c
= va_arg(params
, int);
(*__svgalib_driverspecs
->accelspecs
->SetTransparency
) (m
, c
);
break;
}
case ACCEL_SETRASTEROP
:
{
int r
;
r
= va_arg(params
, int);
(*__svgalib_driverspecs
->accelspecs
->SetRasterOp
) (r
);
break;
}
case ACCEL_PUTBITMAP
:
{
int x
, y
, w
, h
;
void *p
;
x
= va_arg(params
, int);
y
= va_arg(params
, int);
w
= va_arg(params
, int);
h
= va_arg(params
, int);
p
= va_arg(params
, void *);
(*__svgalib_driverspecs
->accelspecs
->PutBitmap
) (x
, y
, w
, h
, p
);
break;
}
case ACCEL_SCREENCOPYBITMAP
:
{
int x1
, y1
, x2
, y2
, w
, h
;
x1
= va_arg(params
, int);
y1
= va_arg(params
, int);
x2
= va_arg(params
, int);
y2
= va_arg(params
, int);
w
= va_arg(params
, int);
h
= va_arg(params
, int);
(*__svgalib_driverspecs
->accelspecs
->ScreenCopyBitmap
) (x1
, y1
, x2
, y2
, w
, h
);
break;
}
case ACCEL_DRAWHLINELIST
:
{
int y
, n
, *x1
, *x2
;
y
= va_arg(params
, int);
n
= va_arg(params
, int);
x1
= va_arg(params
, int *);
x2
= va_arg(params
, int *);
(*__svgalib_driverspecs
->accelspecs
->DrawHLineList
) (y
, n
, x1
, x2
);
break;
}
case ACCEL_SETMODE
:
{
int m
;
/* This isn't sent to the chipset-specific driver. */
m
= va_arg(params
, int);
if ((__svgalib_accel_mode
& BLITS_IN_BACKGROUND
)
&& !(m
& BLITS_IN_BACKGROUND
))
/* Make sure background blits are finished. */
(*__svgalib_driverspecs
->accelspecs
->Sync
) ();
__svgalib_accel_mode
= m
;
break;
}
case ACCEL_SYNC
:
(*__svgalib_driverspecs
->accelspecs
->Sync
) ();
break;
} /* switch */
va_end(params
);
vga_unlockvc
();
return 0;
}