blue.c
来自「一个类似windows」· C语言 代码 · 共 693 行 · 第 1/2 页
C
693 行
/* $Id: blue.c 21706 2006-04-22 14:01:25Z tretiakov $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: services/dd/blue/blue.c
* PURPOSE: Console (blue screen) device driver
* PROGRAMMER: Eric Kohl (ekohl@abo.rhein-zeitung.de)
* UPDATE HISTORY:
* ??? Created
*/
/* INCLUDES ******************************************************************/
#include <ntddk.h>
#include <windef.h>
#define WINBASEAPI
typedef struct _SECURITY_ATTRIBUTES SECURITY_ATTRIBUTES, *PSECURITY_ATTRIBUTES;
#include <wincon.h>
#include <blue/ntddblue.h>
#include <ndk/halfuncs.h>
#define NDEBUG
#include <debug.h>
/* DEFINITIONS ***************************************************************/
#define VIDMEM_BASE 0xb8000
#define CRTC_COMMAND ((PUCHAR)0x3d4)
#define CRTC_DATA ((PUCHAR)0x3d5)
#define CRTC_COLUMNS 0x01
#define CRTC_OVERFLOW 0x07
#define CRTC_ROWS 0x12
#define CRTC_SCANLINES 0x09
#define CRTC_CURSORSTART 0x0a
#define CRTC_CURSOREND 0x0b
#define CRTC_CURSORPOSHI 0x0e
#define CRTC_CURSORPOSLO 0x0f
#define ATTRC_WRITEREG ((PUCHAR)0x3c0)
#define ATTRC_READREG ((PUCHAR)0x3c1)
#define ATTRC_INPST1 ((PUCHAR)0x3da)
#define TAB_WIDTH 8
/* NOTES ******************************************************************/
/*
* [[character][attribute]][[character][attribute]]....
*/
/* TYPEDEFS ***************************************************************/
typedef struct _DEVICE_EXTENSION
{
PUCHAR VideoMemory; /* Pointer to video memory */
ULONG CursorSize;
INT CursorVisible;
USHORT CharAttribute;
ULONG Mode;
UCHAR ScanLines; /* Height of a text line */
USHORT Rows; /* Number of rows */
USHORT Columns; /* Number of columns */
} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
/* FUNCTIONS **************************************************************/
NTSTATUS STDCALL
DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath);
static NTSTATUS STDCALL
ScrCreate(PDEVICE_OBJECT DeviceObject,
PIRP Irp)
{
PDEVICE_EXTENSION DeviceExtension;
PHYSICAL_ADDRESS BaseAddress;
NTSTATUS Status;
unsigned int offset;
UCHAR data, value;
DeviceExtension = DeviceObject->DeviceExtension;
/* disable interrupts */
_disable();
/* get current output position */
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSLO);
offset = READ_PORT_UCHAR (CRTC_DATA);
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSHI);
offset += (READ_PORT_UCHAR (CRTC_DATA) << 8);
/* switch blinking characters off */
READ_PORT_UCHAR (ATTRC_INPST1);
value = READ_PORT_UCHAR (ATTRC_WRITEREG);
WRITE_PORT_UCHAR (ATTRC_WRITEREG, 0x10);
data = READ_PORT_UCHAR (ATTRC_READREG);
data = data & ~0x08;
WRITE_PORT_UCHAR (ATTRC_WRITEREG, data);
WRITE_PORT_UCHAR (ATTRC_WRITEREG, value);
READ_PORT_UCHAR (ATTRC_INPST1);
/* read screen information from crt controller */
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_COLUMNS);
DeviceExtension->Columns = READ_PORT_UCHAR (CRTC_DATA) + 1;
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_ROWS);
DeviceExtension->Rows = READ_PORT_UCHAR (CRTC_DATA);
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_OVERFLOW);
data = READ_PORT_UCHAR (CRTC_DATA);
DeviceExtension->Rows |= (((data & 0x02) << 7) | ((data & 0x40) << 3));
DeviceExtension->Rows++;
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_SCANLINES);
DeviceExtension->ScanLines = (READ_PORT_UCHAR (CRTC_DATA) & 0x1F) + 1;
/* enable interrupts */
_enable();
/* calculate number of text rows */
DeviceExtension->Rows =
DeviceExtension->Rows / DeviceExtension->ScanLines;
#ifdef BOCHS_30ROWS
DeviceExtension->Rows = 30;
#endif
DPRINT ("%d Columns %d Rows %d Scanlines\n",
DeviceExtension->Columns,
DeviceExtension->Rows,
DeviceExtension->ScanLines);
/* get pointer to video memory */
BaseAddress.QuadPart = VIDMEM_BASE;
DeviceExtension->VideoMemory =
(PUCHAR)MmMapIoSpace (BaseAddress, DeviceExtension->Rows * DeviceExtension->Columns * 2, MmNonCached);
DeviceExtension->CursorSize = 5; /* FIXME: value correct?? */
DeviceExtension->CursorVisible = TRUE;
/* more initialization */
DeviceExtension->CharAttribute = 0x17; /* light grey on blue */
DeviceExtension->Mode = ENABLE_PROCESSED_OUTPUT |
ENABLE_WRAP_AT_EOL_OUTPUT;
/* show blinking cursor */
_disable();
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORSTART);
WRITE_PORT_UCHAR (CRTC_DATA, (DeviceExtension->ScanLines - 1) & 0x1F);
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSOREND);
data = READ_PORT_UCHAR (CRTC_DATA) & 0xE0;
WRITE_PORT_UCHAR (CRTC_DATA,
data | ((DeviceExtension->ScanLines - 1) & 0x1F));
_enable();
Status = STATUS_SUCCESS;
Irp->IoStatus.Status = Status;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
return (Status);
}
static NTSTATUS STDCALL
ScrWrite(PDEVICE_OBJECT DeviceObject,
PIRP Irp)
{
PIO_STACK_LOCATION stk = IoGetCurrentIrpStackLocation (Irp);
PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
NTSTATUS Status;
char *pch = Irp->UserBuffer;
PUCHAR vidmem;
unsigned int i;
int j, offset;
int cursorx, cursory;
int rows, columns;
int processed = DeviceExtension->Mode & ENABLE_PROCESSED_OUTPUT;
if (HalQueryDisplayOwnership())
{
/* Display is in graphics mode, we're not allowed to touch it */
Status = STATUS_SUCCESS;
Irp->IoStatus.Status = Status;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
return Status;
}
vidmem = DeviceExtension->VideoMemory;
rows = DeviceExtension->Rows;
columns = DeviceExtension->Columns;
_disable();
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSHI);
offset = READ_PORT_UCHAR (CRTC_DATA)<<8;
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSLO);
offset += READ_PORT_UCHAR (CRTC_DATA);
_enable();
cursory = offset / columns;
cursorx = offset % columns;
if( processed == 0 )
{
/* raw output mode */
memcpy( &vidmem[(cursorx * 2) + (cursory * columns * 2)], pch, stk->Parameters.Write.Length );
offset += (stk->Parameters.Write.Length / 2);
}
else {
for (i = 0; i < stk->Parameters.Write.Length; i++, pch++)
{
switch (*pch)
{
case '\b':
if (cursorx > 0)
{
cursorx--;
}
else if (cursory > 0)
{
cursorx = columns - 1;
cursory--;
}
vidmem[(cursorx * 2) + (cursory * columns * 2)] = ' ';
vidmem[(cursorx * 2) + (cursory * columns * 2) + 1] = (char) DeviceExtension->CharAttribute;
break;
case '\n':
cursory++;
cursorx = 0;
break;
case '\r':
cursorx = 0;
break;
case '\t':
offset = TAB_WIDTH - (cursorx % TAB_WIDTH);
for (j = 0; j < offset; j++)
{
vidmem[(cursorx * 2) + (cursory * columns * 2)] = ' ';
cursorx++;
if (cursorx >= columns)
{
cursory++;
cursorx = 0;
}
}
break;
default:
vidmem[(cursorx * 2) + (cursory * columns * 2)] = *pch;
vidmem[(cursorx * 2) + (cursory * columns * 2) + 1] = (char) DeviceExtension->CharAttribute;
cursorx++;
if (cursorx >= columns)
{
cursory++;
cursorx = 0;
}
break;
}
if (cursory >= rows)
{
unsigned short *LinePtr;
memcpy (vidmem,
&vidmem[columns * 2],
columns * (rows - 1) * 2);
LinePtr = (unsigned short *) &vidmem[columns * (rows - 1) * 2];
for (j = 0; j < columns; j++)
{
LinePtr[j] = DeviceExtension->CharAttribute << 8;
}
cursory = rows - 1;
for (j = 0; j < columns; j++)
{
vidmem[(j * 2) + (cursory * columns * 2)] = ' ';
vidmem[(j * 2) + (cursory * columns * 2) + 1] = (char)DeviceExtension->CharAttribute;
}
}
}
/* Set the cursor position */
offset = (cursory * columns) + cursorx;
}
_disable();
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSLO);
WRITE_PORT_UCHAR (CRTC_DATA, offset);
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSHI);
offset >>= 8;
WRITE_PORT_UCHAR (CRTC_DATA, offset);
_enable();
Status = STATUS_SUCCESS;
Irp->IoStatus.Status = Status;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
return (Status);
}
static NTSTATUS STDCALL
ScrIoControl(PDEVICE_OBJECT DeviceObject,
PIRP Irp)
{
PIO_STACK_LOCATION stk = IoGetCurrentIrpStackLocation (Irp);
PDEVICE_EXTENSION DeviceExtension;
NTSTATUS Status;
DeviceExtension = DeviceObject->DeviceExtension;
switch (stk->Parameters.DeviceIoControl.IoControlCode)
{
case IOCTL_CONSOLE_GET_SCREEN_BUFFER_INFO:
{
PCONSOLE_SCREEN_BUFFER_INFO pcsbi = (PCONSOLE_SCREEN_BUFFER_INFO)Irp->AssociatedIrp.SystemBuffer;
int rows = DeviceExtension->Rows;
int columns = DeviceExtension->Columns;
unsigned int offset;
/* read cursor position from crtc */
_disable();
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSLO);
offset = READ_PORT_UCHAR (CRTC_DATA);
WRITE_PORT_UCHAR (CRTC_COMMAND, CRTC_CURSORPOSHI);
offset += (READ_PORT_UCHAR (CRTC_DATA) << 8);
_enable();
pcsbi->dwSize.X = columns;
pcsbi->dwSize.Y = rows;
pcsbi->dwCursorPosition.X = (SHORT)(offset % columns);
pcsbi->dwCursorPosition.Y = (SHORT)(offset / columns);
pcsbi->wAttributes = DeviceExtension->CharAttribute;
pcsbi->srWindow.Left = 0;
pcsbi->srWindow.Right = columns - 1;
pcsbi->srWindow.Top = 0;
pcsbi->srWindow.Bottom = rows - 1;
pcsbi->dwMaximumWindowSize.X = columns;
pcsbi->dwMaximumWindowSize.Y = rows;
⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?