mirror of
https://github.com/reactos/reactos.git
synced 2024-11-03 13:25:57 +00:00
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
extern ULONG_PTR VgaRegisterBase;
|
||
|
|
extern ULONG_PTR VgaBase;
|
||
|
|
extern USHORT AT_Initialization[];
|
||
|
|
extern USHORT VGA_640x480[];
|
||
|
|
extern UCHAR PixelMask[8];
|
||
|
|
|
||
|
|
#define __inpb(Port) \
|
||
|
|
READ_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)))
|
||
|
|
|
||
|
|
#define __inpw(Port) \
|
||
|
|
READ_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)))
|
||
|
|
|
||
|
|
#define __outpb(Port, Value) \
|
||
|
|
WRITE_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)), (UCHAR)(Value))
|
||
|
|
|
||
|
|
#define __outpw(Port, Value) \
|
||
|
|
WRITE_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)), (USHORT)(Value))
|
||
|
|
|
||
|
|
FORCEINLINE
|
||
|
|
VOID
|
||
|
|
SetPixel(
|
||
|
|
_In_ ULONG Left,
|
||
|
|
_In_ ULONG Top,
|
||
|
|
_In_ UCHAR Color)
|
||
|
|
{
|
||
|
|
PUCHAR PixelPosition;
|
||
|
|
|
||
|
|
/* Calculate the pixel position */
|
||
|
|
PixelPosition = (PUCHAR)(VgaBase + (Left >> 3) + (Top * (SCREEN_WIDTH / 8)));
|
||
|
|
|
||
|
|
/* Select the bitmask register and write the mask */
|
||
|
|
__outpw(VGA_BASE_IO_PORT + GRAPH_ADDRESS_PORT, (PixelMask[Left & 7] << 8) | IND_BIT_MASK);
|
||
|
|
|
||
|
|
/* Read the current pixel value and add our color */
|
||
|
|
WRITE_REGISTER_UCHAR(PixelPosition, READ_REGISTER_UCHAR(PixelPosition) & Color);
|
||
|
|
}
|