#include "vga.h"

Include dependency graph for pc.h:

Macros
#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))

Enumerations
enum	VGA_GRAPHICS_CONTROLLER_STATE { VGA_GC_STATE_UNINITIALIZED , VGA_GC_STATE_READ_PIXELS , VGA_GC_STATE_WRITE_PIXELS , VGA_GC_STATE_COPY_PIXELS }

Functions
VOID	InitPaletteWithTable (_In_reads_(Count) const ULONG *Table, _In_ ULONG Count)

VOID	PrepareForSetPixel (VOID)

FORCEINLINE VOID	SetPixel (_In_ ULONG Left, _In_ ULONG Top, _In_ UCHAR Color)

Variables
VGA_GRAPHICS_CONTROLLER_STATE	VgaGCState

ULONG_PTR	VgaRegisterBase

ULONG_PTR	VgaBase

const USHORT	AT_Initialization []

const USHORT	VGA_640x480 []

const UCHAR	PixelMask [8]

Macro Definition Documentation

◆ __inpb

#define __inpb ( Port ) READ_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)))

Definition at line 27 of file pc.h.

◆ __inpw

#define __inpw ( Port ) READ_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)))

Definition at line 30 of file pc.h.

◆ __outpb

#define __outpb	(	Port,
		Value
	)	WRITE_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)), (UCHAR)(Value))

Definition at line 33 of file pc.h.

◆ __outpw

#define __outpw	(	Port,
		Value
	)	WRITE_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)), (USHORT)(Value))

Definition at line 36 of file pc.h.

Enumeration Type Documentation

◆ VGA_GRAPHICS_CONTROLLER_STATE

enum VGA_GRAPHICS_CONTROLLER_STATE

Enumerator
VGA_GC_STATE_UNINITIALIZED
VGA_GC_STATE_READ_PIXELS
VGA_GC_STATE_WRITE_PIXELS
VGA_GC_STATE_COPY_PIXELS

Definition at line 12 of file pc.h.

{
    VGA_GC_STATE_UNINITIALIZED,
    VGA_GC_STATE_READ_PIXELS,
    VGA_GC_STATE_WRITE_PIXELS,
    VGA_GC_STATE_COPY_PIXELS
} VGA_GRAPHICS_CONTROLLER_STATE;

Function Documentation

◆ InitPaletteWithTable()

VOID InitPaletteWithTable	(	_In_reads_(Count) const ULONG *	Table,
		_In_ ULONG	Count
	)

Definition at line 220 of file bootvid.c.

{
    UNIMPLEMENTED;
}

◆ PrepareForSetPixel()

VOID PrepareForSetPixel ( VOID )

Definition at line 116 of file vga.c.

{
    if (VgaGCState == VGA_GC_STATE_WRITE_PIXELS)
        return;
    VgaGCState = VGA_GC_STATE_WRITE_PIXELS;
 
    /* Select read mode 1 and write mode 2 */
    ReadWriteMode(0xA);
 
    /* Enable all memory planes */
    __outpw(VGA_BASE_IO_PORT + SEQ_ADDRESS_PORT, (0x0F << 8) | IND_MAP_MASK);
 
    /* Clear the color don't care register, so read mode 1 reads always return 0xFF */
    __outpw(VGA_BASE_IO_PORT + GRAPH_ADDRESS_PORT, 7);
}

◆ SetPixel()

FORCEINLINE VOID SetPixel	(	_In_ ULONG	Left,
		_In_ ULONG	Top,
		_In_ UCHAR	Color
	)

Definition at line 49 of file pc.h.

{
    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);
 
    /* Dummy read to load latch registers */
    (VOID)READ_REGISTER_UCHAR(PixelPosition);
 
    /* Set the new color */
    WRITE_REGISTER_UCHAR(PixelPosition, Color);
}