reactos/drivers/setup/blue/blue.c
Katayama Hirofumi MZ 3526ffc094
[BLUE] Optimize ScrIoControl for speed (#5185)
Optimize IOCTL_CONSOLE_FILL_OUTPUT_ATTRIBUTE and IOCTL_CONSOLE_FILL_OUTPUT_CHARACTER for speed by using cache. CORE-18838
2023-03-28 08:12:38 +09:00

1613 lines
53 KiB
C

/*
* PROJECT: ReactOS Console Text-Mode Device Driver
* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
* PURPOSE: Driver Management Functions.
* COPYRIGHT: Copyright 1999 Boudewijn Dekker
* Copyright 1999-2019 Eric Kohl
* Copyright 2006 Filip Navara
* Copyright 2019 Hermes Belusca-Maito
*/
/* INCLUDES ******************************************************************/
#include "blue.h"
#include <ndk/inbvfuncs.h>
#define NDEBUG
#include <debug.h>
/* NOTES ******************************************************************/
/*
* [[character][attribute]][[character][attribute]]....
*/
/* TYPEDEFS ***************************************************************/
typedef struct _DEVICE_EXTENSION
{
PUCHAR VideoMemory; /* Pointer to video memory */
SIZE_T VideoMemorySize;
BOOLEAN Enabled;
PUCHAR ScreenBuffer; /* Pointer to screenbuffer */
SIZE_T ScreenBufferSize;
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 */
USHORT CursorX, CursorY; /* Cursor position */
PUCHAR FontBitfield; /* Specifies the font */
} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
typedef struct _VGA_REGISTERS
{
UCHAR CRT[24];
UCHAR Attribute[21];
UCHAR Graphics[9];
UCHAR Sequencer[5];
UCHAR Misc;
} VGA_REGISTERS, *PVGA_REGISTERS;
static const VGA_REGISTERS VidpMode3Regs =
{
/* CRT Controller Registers */
{0x5F, 0x4F, 0x50, 0x82, 0x55, 0x81, 0xBF, 0x1F, 0x00, 0x47, 0x1E, 0x00,
0x00, 0x00, 0x05, 0xF0, 0x9C, 0x8E, 0x8F, 0x28, 0x1F, 0x96, 0xB9, 0xA3},
/* Attribute Controller Registers */
{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07, 0x38, 0x39, 0x3A, 0x3B,
0x3C, 0x3D, 0x3E, 0x3F, 0x0C, 0x00, 0x0F, 0x08, 0x00},
/* Graphics Controller Registers */
{0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x0E, 0x00, 0xFF},
/* Sequencer Registers */
{0x03, 0x00, 0x03, 0x00, 0x02},
/* Misc Output Register */
0x67
};
static const UCHAR DefaultPalette[] =
{
0, 0, 0,
0, 0, 0xC0,
0, 0xC0, 0,
0, 0xC0, 0xC0,
0xC0, 0, 0,
0xC0, 0, 0xC0,
0xC0, 0xC0, 0,
0xC0, 0xC0, 0xC0,
0x80, 0x80, 0x80,
0, 0, 0xFF,
0, 0xFF, 0,
0, 0xFF, 0xFF,
0xFF, 0, 0,
0xFF, 0, 0xFF,
0xFF, 0xFF, 0,
0xFF, 0xFF, 0xFF
};
/* INBV MANAGEMENT FUNCTIONS **************************************************/
static BOOLEAN
ScrResetScreen(
_In_ PDEVICE_EXTENSION DeviceExtension,
_In_ BOOLEAN FullReset,
_In_ BOOLEAN Enable);
static PDEVICE_EXTENSION ResetDisplayParametersDeviceExtension = NULL;
static HANDLE InbvThreadHandle = NULL;
static BOOLEAN InbvMonitoring = FALSE;
/*
* Reinitialize the display to base VGA mode.
*
* Returns TRUE if it completely resets the adapter to the given character mode.
* Returns FALSE otherwise, indicating that the HAL should perform the VGA mode
* reset itself after HwVidResetHw() returns control.
*
* This callback has been registered with InbvNotifyDisplayOwnershipLost()
* and is called by InbvAcquireDisplayOwnership(), typically when the bugcheck
* code regains display access. Therefore this routine can be called at any
* IRQL, and in particular at IRQL = HIGH_LEVEL. This routine must also reside
* completely in non-paged pool, and cannot perform the following actions:
* Allocate memory, access pageable memory, use any synchronization mechanisms
* or call any routine that must execute at IRQL = DISPATCH_LEVEL or below.
*/
static BOOLEAN
NTAPI
ScrResetDisplayParametersEx(
_In_ ULONG Columns,
_In_ ULONG Rows,
_In_ BOOLEAN CalledByInbv)
{
PDEVICE_EXTENSION DeviceExtension;
/* Bail out early if we don't have any resettable adapter */
if (!ResetDisplayParametersDeviceExtension)
return FALSE; // No adapter found: request HAL to perform a full reset.
/*
* If we have been unexpectedly called via a callback from
* InbvAcquireDisplayOwnership(), start monitoring INBV.
*/
if (CalledByInbv)
InbvMonitoring = TRUE;
DeviceExtension = ResetDisplayParametersDeviceExtension;
ASSERT(DeviceExtension);
/* Disable the screen but don't reset all screen settings (OK at high IRQL) */
return ScrResetScreen(DeviceExtension, FALSE, FALSE);
}
/* This callback is registered with InbvNotifyDisplayOwnershipLost() */
static BOOLEAN
NTAPI
ScrResetDisplayParameters(
_In_ ULONG Columns,
_In_ ULONG Rows)
{
/* Call the extended function, specifying we were called by INBV */
return ScrResetDisplayParametersEx(Columns, Rows, TRUE);
}
/*
* (Adapted for ReactOS/Win2k3 from an original comment
* by Gé van Geldorp, June 2003, r4937)
*
* DISPLAY OWNERSHIP
*
* So, who owns the physical display and is allowed to write to it?
*
* In NT 5.x (Win2k/Win2k3), upon boot INBV/BootVid owns the display, unless
* /NOGUIBOOT has been specified in the boot command line. Later in the boot
* sequence, WIN32K.SYS opens the DISPLAY device. This open call ends up in
* VIDEOPRT.SYS. This component takes ownership of the display by calling
* InbvNotifyDisplayOwnershipLost() -- effectively telling INBV to release
* ownership of the display it previously had. From that moment on, the display
* is owned by that component and can be switched to graphics mode. The display
* is not supposed to return to text mode, except in case of a bugcheck.
* The bugcheck code calls InbvAcquireDisplayOwnership() so as to make INBV
* re-take display ownership, and calls back the function previously registered
* by VIDEOPRT.SYS with InbvNotifyDisplayOwnershipLost(). After the bugcheck,
* execution is halted. So, under NT, the only possible sequence of display
* modes is text mode -> graphics mode -> text mode (the latter hopefully
* happening very infrequently).
*
* In ReactOS things are a little bit different. We want to have a functional
* interactive text mode. We should be able to switch back and forth from
* text mode to graphics mode when a GUI app is started and then finished.
* Also, when the system bugchecks in graphics mode we want to switch back to
* text mode and show the bugcheck information. Last but not least, when using
* KDBG in /DEBUGPORT=SCREEN mode, breaking into the debugger would trigger a
* switch to text mode, and the user would expect that by continuing execution
* a switch back to graphics mode is done.
*/
static VOID
NTAPI
InbvMonitorThread(
_In_ PVOID Context)
{
LARGE_INTEGER Delay;
USHORT i;
KeSetPriorityThread(KeGetCurrentThread(), LOW_REALTIME_PRIORITY);
while (TRUE)
{
/*
* During one second, check the INBV status each 100 milliseconds,
* then revert to 1 second delay.
*/
i = 10;
Delay.QuadPart = (LONGLONG)-100*1000*10; // 100 millisecond delay
while (!InbvMonitoring)
{
KeDelayExecutionThread(KernelMode, FALSE, &Delay);
if ((i > 0) && (--i == 0))
Delay.QuadPart = (LONGLONG)-1*1000*1000*10; // 1 second delay
}
/*
* Loop while the display is owned by INBV. We cannot do anything else
* than polling since INBV does not offer a proper notification system.
*
* During one second, check the INBV status each 100 milliseconds,
* then revert to 1 second delay.
*/
i = 10;
Delay.QuadPart = (LONGLONG)-100*1000*10; // 100 millisecond delay
while (InbvCheckDisplayOwnership())
{
KeDelayExecutionThread(KernelMode, FALSE, &Delay);
if ((i > 0) && (--i == 0))
Delay.QuadPart = (LONGLONG)-1*1000*1000*10; // 1 second delay
}
/* Reset the monitoring */
InbvMonitoring = FALSE;
/*
* Somebody released INBV display ownership, usually by invoking
* InbvNotifyDisplayOwnershipLost(). However the caller of this
* function certainly specified a different callback than ours.
* As we are going to be the only owner of the active display,
* we need to re-register our own display reset callback.
*/
InbvNotifyDisplayOwnershipLost(ScrResetDisplayParameters);
/* Re-enable the screen, keeping the original screen settings */
if (ResetDisplayParametersDeviceExtension)
ScrResetScreen(ResetDisplayParametersDeviceExtension, FALSE, TRUE);
}
// FIXME: See ScrInbvCleanup().
// PsTerminateSystemThread(STATUS_SUCCESS);
}
static NTSTATUS
ScrInbvInitialize(VOID)
{
/* Create the INBV monitoring thread if needed */
if (!InbvThreadHandle)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes = RTL_CONSTANT_OBJECT_ATTRIBUTES(NULL, OBJ_KERNEL_HANDLE);
Status = PsCreateSystemThread(&InbvThreadHandle,
0,
&ObjectAttributes,
NULL,
NULL,
InbvMonitorThread,
NULL);
if (!NT_SUCCESS(Status))
InbvThreadHandle = NULL;
}
/* Re-register the display reset callback with INBV */
InbvNotifyDisplayOwnershipLost(ScrResetDisplayParameters);
return STATUS_SUCCESS;
}
static NTSTATUS
ScrInbvCleanup(VOID)
{
// HANDLE ThreadHandle;
// ResetDisplayParametersDeviceExtension = NULL;
if (ResetDisplayParametersDeviceExtension)
{
InbvNotifyDisplayOwnershipLost(NULL);
ScrResetDisplayParametersEx(80, 50, FALSE);
// or InbvAcquireDisplayOwnership(); ?
}
#if 0
// TODO: Find the best way to communicate the request.
/* Signal the INBV monitoring thread and wait for it to terminate */
ThreadHandle = InterlockedExchangePointer((PVOID*)&InbvThreadHandle, NULL);
if (ThreadHandle)
{
ZwWaitForSingleObject(ThreadHandle, Executive, KernelMode, FALSE, NULL);
/* Close its handle */
ObCloseHandle(ThreadHandle, KernelMode);
}
#endif
return STATUS_SUCCESS;
}
/* FUNCTIONS **************************************************************/
static VOID
FASTCALL
ScrSetRegisters(const VGA_REGISTERS *Registers)
{
UINT32 i;
/* Update misc output register */
WRITE_PORT_UCHAR(MISC, Registers->Misc);
/* Synchronous reset on */
WRITE_PORT_UCHAR(SEQ, 0x00);
WRITE_PORT_UCHAR(SEQDATA, 0x01);
/* Write sequencer registers */
for (i = 1; i < sizeof(Registers->Sequencer); i++)
{
WRITE_PORT_UCHAR(SEQ, i);
WRITE_PORT_UCHAR(SEQDATA, Registers->Sequencer[i]);
}
/* Synchronous reset off */
WRITE_PORT_UCHAR(SEQ, 0x00);
WRITE_PORT_UCHAR(SEQDATA, 0x03);
/* Deprotect CRT registers 0-7 */
WRITE_PORT_UCHAR(CRTC, 0x11);
WRITE_PORT_UCHAR(CRTCDATA, Registers->CRT[0x11] & 0x7f);
/* Write CRT registers */
for (i = 0; i < sizeof(Registers->CRT); i++)
{
WRITE_PORT_UCHAR(CRTC, i);
WRITE_PORT_UCHAR(CRTCDATA, Registers->CRT[i]);
}
/* Write graphics controller registers */
for (i = 0; i < sizeof(Registers->Graphics); i++)
{
WRITE_PORT_UCHAR(GRAPHICS, i);
WRITE_PORT_UCHAR(GRAPHICSDATA, Registers->Graphics[i]);
}
/* Write attribute controller registers */
for (i = 0; i < sizeof(Registers->Attribute); i++)
{
READ_PORT_UCHAR(STATUS);
WRITE_PORT_UCHAR(ATTRIB, i);
WRITE_PORT_UCHAR(ATTRIB, Registers->Attribute[i]);
}
/* Set the PEL mask */
WRITE_PORT_UCHAR(PELMASK, 0xff);
}
static VOID
FASTCALL
ScrSetCursor(
_In_ PDEVICE_EXTENSION DeviceExtension)
{
ULONG Offset;
if (!DeviceExtension->VideoMemory)
return;
Offset = (DeviceExtension->CursorY * DeviceExtension->Columns) + DeviceExtension->CursorX;
_disable();
WRITE_PORT_UCHAR(CRTC_COMMAND, CRTC_CURSORPOSLO);
WRITE_PORT_UCHAR(CRTC_DATA, Offset);
WRITE_PORT_UCHAR(CRTC_COMMAND, CRTC_CURSORPOSHI);
WRITE_PORT_UCHAR(CRTC_DATA, Offset >> 8);
_enable();
}
static VOID
FASTCALL
ScrSetCursorShape(
_In_ PDEVICE_EXTENSION DeviceExtension)
{
ULONG size, height;
UCHAR data, value;
if (!DeviceExtension->VideoMemory)
return;
height = DeviceExtension->ScanLines;
data = (DeviceExtension->CursorVisible) ? 0x00 : 0x20;
size = (DeviceExtension->CursorSize * height) / 100;
if (size < 1)
size = 1;
data |= (UCHAR)(height - size);
_disable();
WRITE_PORT_UCHAR(CRTC_COMMAND, CRTC_CURSORSTART);
WRITE_PORT_UCHAR(CRTC_DATA, data);
WRITE_PORT_UCHAR(CRTC_COMMAND, CRTC_CURSOREND);
value = READ_PORT_UCHAR(CRTC_DATA) & 0xE0;
WRITE_PORT_UCHAR(CRTC_DATA, value | (height - 1));
_enable();
}
static VOID
FASTCALL
ScrAcquireOwnership(
_In_ PDEVICE_EXTENSION DeviceExtension)
{
UCHAR data, value;
ULONG offset;
ULONG Index;
_disable();
ScrSetRegisters(&VidpMode3Regs);
/* Disable screen and enable palette access */
READ_PORT_UCHAR(STATUS);
WRITE_PORT_UCHAR(ATTRIB, 0x00);
for (Index = 0; Index < sizeof(DefaultPalette) / 3; Index++)
{
WRITE_PORT_UCHAR(PELINDEX, Index);
WRITE_PORT_UCHAR(PELDATA, DefaultPalette[Index * 3] >> 2);
WRITE_PORT_UCHAR(PELDATA, DefaultPalette[Index * 3 + 1] >> 2);
WRITE_PORT_UCHAR(PELDATA, DefaultPalette[Index * 3 + 2] >> 2);
}
/* Enable screen and disable palette access */
READ_PORT_UCHAR(STATUS);
WRITE_PORT_UCHAR(ATTRIB, 0x20);
/* 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;
/* Retrieve the current output cursor 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);
/* Show blinking cursor */
// FIXME: cursor block? Call ScrSetCursorShape() instead?
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();
/* Calculate number of text rows */
DeviceExtension->Rows = DeviceExtension->Rows / DeviceExtension->ScanLines;
/* Set the cursor position, clipping it to the screen */
DeviceExtension->CursorX = (USHORT)(offset % DeviceExtension->Columns);
DeviceExtension->CursorY = (USHORT)(offset / DeviceExtension->Columns);
// DeviceExtension->CursorX = min(max(DeviceExtension->CursorX, 0), DeviceExtension->Columns - 1);
DeviceExtension->CursorY = min(max(DeviceExtension->CursorY, 0), DeviceExtension->Rows - 1);
/* Set the font */
if (DeviceExtension->FontBitfield)
ScrSetFont(DeviceExtension->FontBitfield);
DPRINT("%d Columns %d Rows %d Scanlines\n",
DeviceExtension->Columns,
DeviceExtension->Rows,
DeviceExtension->ScanLines);
}
static BOOLEAN
ScrResetScreen(
_In_ PDEVICE_EXTENSION DeviceExtension,
_In_ BOOLEAN FullReset,
_In_ BOOLEAN Enable)
{
#define FOREGROUND_LIGHTGRAY (FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED)
PHYSICAL_ADDRESS BaseAddress;
/* Allow resets to the same state only for full resets */
if (!FullReset && (Enable == DeviceExtension->Enabled))
return FALSE; // STATUS_INVALID_PARAMETER; STATUS_INVALID_DEVICE_REQUEST;
if (FullReset)
{
DeviceExtension->CursorSize = 5; /* FIXME: value correct?? */
DeviceExtension->CursorVisible = TRUE;
if (DeviceExtension->FontBitfield)
{
ExFreePoolWithTag(DeviceExtension->FontBitfield, TAG_BLUE);
DeviceExtension->FontBitfield = NULL;
}
/* More initialization */
DeviceExtension->CharAttribute = BACKGROUND_BLUE | FOREGROUND_LIGHTGRAY;
DeviceExtension->Mode = ENABLE_PROCESSED_OUTPUT |
ENABLE_WRAP_AT_EOL_OUTPUT;
}
if (Enable)
{
ScrAcquireOwnership(DeviceExtension);
if (FullReset)
{
/*
* Fully reset the screen and all its settings.
*/
/* Unmap any previously mapped video memory */
if (DeviceExtension->VideoMemory)
{
ASSERT(DeviceExtension->VideoMemorySize != 0);
MmUnmapIoSpace(DeviceExtension->VideoMemory, DeviceExtension->VideoMemorySize);
}
DeviceExtension->VideoMemory = NULL;
DeviceExtension->VideoMemorySize = 0;
/* Free any previously allocated backup screenbuffer */
if (DeviceExtension->ScreenBuffer)
{
ASSERT(DeviceExtension->ScreenBufferSize != 0);
ExFreePoolWithTag(DeviceExtension->ScreenBuffer, TAG_BLUE);
}
DeviceExtension->ScreenBuffer = NULL;
DeviceExtension->ScreenBufferSize = 0;
/* Get a pointer to the video memory */
DeviceExtension->VideoMemorySize = DeviceExtension->Rows * DeviceExtension->Columns * 2;
if (DeviceExtension->VideoMemorySize == 0)
return FALSE; // STATUS_INVALID_VIEW_SIZE; STATUS_MAPPED_FILE_SIZE_ZERO;
/* Map the video memory */
BaseAddress.QuadPart = VIDMEM_BASE;
DeviceExtension->VideoMemory =
(PUCHAR)MmMapIoSpace(BaseAddress, DeviceExtension->VideoMemorySize, MmNonCached);
if (!DeviceExtension->VideoMemory)
{
DeviceExtension->VideoMemorySize = 0;
return FALSE; // STATUS_NONE_MAPPED; STATUS_NOT_MAPPED_VIEW; STATUS_CONFLICTING_ADDRESSES;
}
/* Initialize the backup screenbuffer in non-paged pool (must be accessible at high IRQL) */
DeviceExtension->ScreenBufferSize = DeviceExtension->VideoMemorySize;
DeviceExtension->ScreenBuffer =
(PUCHAR)ExAllocatePoolWithTag(NonPagedPool, DeviceExtension->ScreenBufferSize, TAG_BLUE);
if (!DeviceExtension->ScreenBuffer)
{
DPRINT1("Could not allocate screenbuffer, ignore...\n");
DeviceExtension->ScreenBufferSize = 0;
}
/* (Re-)initialize INBV */
ScrInbvInitialize();
}
else
{
/*
* Restore the previously disabled screen.
*/
/* Restore the snapshot of the video memory from the backup screenbuffer */
if (DeviceExtension->ScreenBuffer)
{
ASSERT(DeviceExtension->VideoMemory);
ASSERT(DeviceExtension->ScreenBuffer);
ASSERT(DeviceExtension->ScreenBufferSize != 0);
ASSERT(DeviceExtension->VideoMemorySize == DeviceExtension->ScreenBufferSize);
RtlCopyMemory(DeviceExtension->VideoMemory,
DeviceExtension->ScreenBuffer,
DeviceExtension->VideoMemorySize);
}
/* Restore the cursor state */
ScrSetCursor(DeviceExtension);
ScrSetCursorShape(DeviceExtension);
}
DeviceExtension->Enabled = TRUE;
}
else
{
DeviceExtension->Enabled = FALSE;
if (FullReset)
{
/*
* Fully disable the screen and reset all its settings.
*/
/* Clean INBV up */
ScrInbvCleanup();
/* Unmap any previously mapped video memory */
if (DeviceExtension->VideoMemory)
{
ASSERT(DeviceExtension->VideoMemorySize != 0);
MmUnmapIoSpace(DeviceExtension->VideoMemory, DeviceExtension->VideoMemorySize);
}
DeviceExtension->VideoMemory = NULL;
DeviceExtension->VideoMemorySize = 0;
/* Free any previously allocated backup screenbuffer */
if (DeviceExtension->ScreenBuffer)
{
ASSERT(DeviceExtension->ScreenBufferSize != 0);
ExFreePoolWithTag(DeviceExtension->ScreenBuffer, TAG_BLUE);
}
DeviceExtension->ScreenBuffer = NULL;
DeviceExtension->ScreenBufferSize = 0;
/* Store dummy values */
DeviceExtension->Columns = 1;
DeviceExtension->Rows = 1;
DeviceExtension->ScanLines = 1;
}
else
{
/*
* Partially disable the screen such that it can be restored later.
*/
/* Take a snapshot of the video memory into the backup screenbuffer */
if (DeviceExtension->ScreenBuffer)
{
ASSERT(DeviceExtension->VideoMemory);
ASSERT(DeviceExtension->ScreenBuffer);
ASSERT(DeviceExtension->ScreenBufferSize != 0);
ASSERT(DeviceExtension->VideoMemorySize == DeviceExtension->ScreenBufferSize);
RtlCopyMemory(DeviceExtension->ScreenBuffer,
DeviceExtension->VideoMemory,
DeviceExtension->VideoMemorySize);
}
}
}
return TRUE; // STATUS_SUCCESS;
}
static DRIVER_DISPATCH ScrCreateClose;
static NTSTATUS
NTAPI
ScrCreateClose(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ PIRP Irp)
{
PIO_STACK_LOCATION stk = IoGetCurrentIrpStackLocation(Irp);
UNREFERENCED_PARAMETER(DeviceObject);
if (stk->MajorFunction == IRP_MJ_CREATE)
Irp->IoStatus.Information = FILE_OPENED;
// else: IRP_MJ_CLOSE
Irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
static DRIVER_DISPATCH ScrWrite;
static NTSTATUS
NTAPI
ScrWrite(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ PIRP Irp)
{
NTSTATUS Status;
PIO_STACK_LOCATION stk = IoGetCurrentIrpStackLocation(Irp);
PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
PCHAR pch = Irp->UserBuffer;
PUCHAR vidmem;
ULONG i;
ULONG j, offset;
USHORT cursorx, cursory;
USHORT rows, columns;
BOOLEAN processed = !!(DeviceExtension->Mode & ENABLE_PROCESSED_OUTPUT);
if (!DeviceExtension->Enabled || !DeviceExtension->VideoMemory)
{
/* Display is not enabled, 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;
cursorx = DeviceExtension->CursorX;
cursory = DeviceExtension->CursorY;
if (!processed)
{
/* Raw output mode */
/* Calculate the offset from the cursor position */
offset = cursorx + cursory * columns;
// FIXME: Does the buffer only contains chars? or chars + attributes?
// FIXME2: Fix buffer overflow.
RtlCopyMemory(&vidmem[offset * 2], pch, stk->Parameters.Write.Length);
offset += (stk->Parameters.Write.Length / 2);
/* Set the cursor position, clipping it to the screen */
cursorx = (USHORT)(offset % columns);
cursory = (USHORT)(offset / columns);
// cursorx = min(max(cursorx, 0), columns - 1);
cursory = min(max(cursory, 0), rows - 1);
}
else
{
/* Cooked output mode */
for (i = 0; i < stk->Parameters.Write.Length; i++, pch++)
{
switch (*pch)
{
case '\b':
{
if (cursorx > 0)
{
cursorx--;
}
else if (cursory > 0)
{
cursory--;
cursorx = columns - 1;
}
offset = cursorx + cursory * columns;
vidmem[offset * 2] = ' ';
vidmem[offset * 2 + 1] = (char)DeviceExtension->CharAttribute;
break;
}
case '\n':
cursory++;
/* Fall back */
case '\r':
cursorx = 0;
break;
case '\t':
{
offset = TAB_WIDTH - (cursorx % TAB_WIDTH);
while (offset--)
{
vidmem[(cursorx + cursory * columns) * 2] = ' ';
cursorx++;
if (cursorx >= columns)
{
cursorx = 0;
cursory++;
/* We jumped to the next line, stop there */
break;
}
}
break;
}
default:
{
offset = cursorx + cursory * columns;
vidmem[offset * 2] = *pch;
vidmem[offset * 2 + 1] = (char)DeviceExtension->CharAttribute;
cursorx++;
if (cursorx >= columns)
{
cursorx = 0;
cursory++;
}
break;
}
}
/* Scroll up the contents of the screen if we are at the end */
if (cursory >= rows)
{
PUSHORT LinePtr;
RtlCopyMemory(vidmem,
&vidmem[columns * 2],
columns * (rows - 1) * 2);
LinePtr = (PUSHORT)&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++)
{
offset = j + cursory * columns;
vidmem[offset * 2] = ' ';
vidmem[offset * 2 + 1] = (char)DeviceExtension->CharAttribute;
}
}
}
}
/* Set the cursor position */
ASSERT((0 <= cursorx) && (cursorx < DeviceExtension->Columns));
ASSERT((0 <= cursory) && (cursory < DeviceExtension->Rows));
DeviceExtension->CursorX = cursorx;
DeviceExtension->CursorY = cursory;
ScrSetCursor(DeviceExtension);
Status = STATUS_SUCCESS;
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_VIDEO_INCREMENT);
return Status;
}
static DRIVER_DISPATCH ScrIoControl;
static NTSTATUS
NTAPI
ScrIoControl(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ PIRP Irp)
{
NTSTATUS Status;
PIO_STACK_LOCATION stk = IoGetCurrentIrpStackLocation(Irp);
PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
switch (stk->Parameters.DeviceIoControl.IoControlCode)
{
case IOCTL_CONSOLE_RESET_SCREEN:
{
BOOLEAN Enable;
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(ULONG))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
Enable = !!*(PULONG)Irp->AssociatedIrp.SystemBuffer;
/* Fully enable or disable the screen */
Status = (ScrResetScreen(DeviceExtension, TRUE, Enable)
? STATUS_SUCCESS : STATUS_UNSUCCESSFUL);
Irp->IoStatus.Information = 0;
break;
}
case IOCTL_CONSOLE_GET_SCREEN_BUFFER_INFO:
{
PCONSOLE_SCREEN_BUFFER_INFO pcsbi;
USHORT rows = DeviceExtension->Rows;
USHORT columns = DeviceExtension->Columns;
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(CONSOLE_SCREEN_BUFFER_INFO))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
pcsbi = (PCONSOLE_SCREEN_BUFFER_INFO)Irp->AssociatedIrp.SystemBuffer;
RtlZeroMemory(pcsbi, sizeof(CONSOLE_SCREEN_BUFFER_INFO));
pcsbi->dwSize.X = columns;
pcsbi->dwSize.Y = rows;
pcsbi->dwCursorPosition.X = DeviceExtension->CursorX;
pcsbi->dwCursorPosition.Y = DeviceExtension->CursorY;
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;
Irp->IoStatus.Information = sizeof(CONSOLE_SCREEN_BUFFER_INFO);
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_SET_SCREEN_BUFFER_INFO:
{
PCONSOLE_SCREEN_BUFFER_INFO pcsbi;
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(CONSOLE_SCREEN_BUFFER_INFO))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
pcsbi = (PCONSOLE_SCREEN_BUFFER_INFO)Irp->AssociatedIrp.SystemBuffer;
if ( pcsbi->dwCursorPosition.X < 0 || pcsbi->dwCursorPosition.X >= DeviceExtension->Columns ||
pcsbi->dwCursorPosition.Y < 0 || pcsbi->dwCursorPosition.Y >= DeviceExtension->Rows )
{
Irp->IoStatus.Information = 0;
Status = STATUS_INVALID_PARAMETER;
break;
}
DeviceExtension->CharAttribute = pcsbi->wAttributes;
/* Set the cursor position */
ASSERT((0 <= pcsbi->dwCursorPosition.X) && (pcsbi->dwCursorPosition.X < DeviceExtension->Columns));
ASSERT((0 <= pcsbi->dwCursorPosition.Y) && (pcsbi->dwCursorPosition.Y < DeviceExtension->Rows));
DeviceExtension->CursorX = pcsbi->dwCursorPosition.X;
DeviceExtension->CursorY = pcsbi->dwCursorPosition.Y;
if (DeviceExtension->Enabled)
ScrSetCursor(DeviceExtension);
Irp->IoStatus.Information = 0;
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_GET_CURSOR_INFO:
{
PCONSOLE_CURSOR_INFO pcci;
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(CONSOLE_CURSOR_INFO))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
pcci = (PCONSOLE_CURSOR_INFO)Irp->AssociatedIrp.SystemBuffer;
RtlZeroMemory(pcci, sizeof(CONSOLE_CURSOR_INFO));
pcci->dwSize = DeviceExtension->CursorSize;
pcci->bVisible = DeviceExtension->CursorVisible;
Irp->IoStatus.Information = sizeof(CONSOLE_CURSOR_INFO);
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_SET_CURSOR_INFO:
{
PCONSOLE_CURSOR_INFO pcci;
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(CONSOLE_CURSOR_INFO))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
pcci = (PCONSOLE_CURSOR_INFO)Irp->AssociatedIrp.SystemBuffer;
DeviceExtension->CursorSize = pcci->dwSize;
DeviceExtension->CursorVisible = pcci->bVisible;
if (DeviceExtension->Enabled)
ScrSetCursorShape(DeviceExtension);
Irp->IoStatus.Information = 0;
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_GET_MODE:
{
PCONSOLE_MODE pcm;
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(CONSOLE_MODE))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
pcm = (PCONSOLE_MODE)Irp->AssociatedIrp.SystemBuffer;
RtlZeroMemory(pcm, sizeof(CONSOLE_MODE));
pcm->dwMode = DeviceExtension->Mode;
Irp->IoStatus.Information = sizeof(CONSOLE_MODE);
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_SET_MODE:
{
PCONSOLE_MODE pcm;
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(CONSOLE_MODE))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
pcm = (PCONSOLE_MODE)Irp->AssociatedIrp.SystemBuffer;
DeviceExtension->Mode = pcm->dwMode;
Irp->IoStatus.Information = 0;
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_FILL_OUTPUT_ATTRIBUTE:
{
POUTPUT_ATTRIBUTE Buf;
PUCHAR vidmem;
ULONG offset;
ULONG dwCount;
ULONG nMaxLength;
/* Validate input and output buffers */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(OUTPUT_ATTRIBUTE) ||
stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(OUTPUT_ATTRIBUTE))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
Buf = (POUTPUT_ATTRIBUTE)Irp->AssociatedIrp.SystemBuffer;
nMaxLength = Buf->nLength;
Buf->dwTransfered = 0;
Irp->IoStatus.Information = sizeof(OUTPUT_ATTRIBUTE);
if ( Buf->dwCoord.X < 0 || Buf->dwCoord.X >= DeviceExtension->Columns ||
Buf->dwCoord.Y < 0 || Buf->dwCoord.Y >= DeviceExtension->Rows ||
nMaxLength == 0 )
{
Status = STATUS_SUCCESS;
break;
}
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
{
UCHAR attr = Buf->wAttribute;
vidmem = DeviceExtension->VideoMemory;
offset = (Buf->dwCoord.X + Buf->dwCoord.Y * DeviceExtension->Columns) * 2 + 1;
nMaxLength = min(nMaxLength,
(DeviceExtension->Rows - Buf->dwCoord.Y)
* DeviceExtension->Columns - Buf->dwCoord.X);
for (dwCount = 0; dwCount < nMaxLength; dwCount++)
{
vidmem[offset + (dwCount * 2)] = attr;
}
Buf->dwTransfered = dwCount;
}
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_READ_OUTPUT_ATTRIBUTE:
{
POUTPUT_ATTRIBUTE Buf;
PUSHORT pAttr;
PUCHAR vidmem;
ULONG offset;
ULONG dwCount;
ULONG nMaxLength;
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(OUTPUT_ATTRIBUTE))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
Buf = (POUTPUT_ATTRIBUTE)Irp->AssociatedIrp.SystemBuffer;
Irp->IoStatus.Information = 0;
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength == 0)
{
Status = STATUS_SUCCESS;
break;
}
ASSERT(Irp->MdlAddress);
pAttr = MmGetSystemAddressForMdlSafe(Irp->MdlAddress, NormalPagePriority);
if (pAttr == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
break;
}
if ( Buf->dwCoord.X < 0 || Buf->dwCoord.X >= DeviceExtension->Columns ||
Buf->dwCoord.Y < 0 || Buf->dwCoord.Y >= DeviceExtension->Rows )
{
Status = STATUS_SUCCESS;
break;
}
nMaxLength = stk->Parameters.DeviceIoControl.OutputBufferLength;
nMaxLength /= sizeof(USHORT);
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
{
vidmem = DeviceExtension->VideoMemory;
offset = (Buf->dwCoord.X + Buf->dwCoord.Y * DeviceExtension->Columns) * 2 + 1;
nMaxLength = min(nMaxLength,
(DeviceExtension->Rows - Buf->dwCoord.Y)
* DeviceExtension->Columns - Buf->dwCoord.X);
for (dwCount = 0; dwCount < nMaxLength; dwCount++, pAttr++)
{
*((PCHAR)pAttr) = vidmem[offset + (dwCount * 2)];
}
Irp->IoStatus.Information = dwCount * sizeof(USHORT);
}
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_WRITE_OUTPUT_ATTRIBUTE:
{
COORD dwCoord;
PCOORD pCoord;
PUSHORT pAttr;
PUCHAR vidmem;
ULONG offset;
ULONG dwCount;
ULONG nMaxLength;
//
// NOTE: For whatever reason no OUTPUT_ATTRIBUTE structure
// is used for this IOCTL.
//
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(COORD))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->MdlAddress);
pCoord = MmGetSystemAddressForMdlSafe(Irp->MdlAddress, NormalPagePriority);
if (pCoord == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
break;
}
/* Capture the input info data */
dwCoord = *pCoord;
nMaxLength = stk->Parameters.DeviceIoControl.OutputBufferLength - sizeof(COORD);
nMaxLength /= sizeof(USHORT);
Irp->IoStatus.Information = 0;
if ( dwCoord.X < 0 || dwCoord.X >= DeviceExtension->Columns ||
dwCoord.Y < 0 || dwCoord.Y >= DeviceExtension->Rows ||
nMaxLength == 0 )
{
Status = STATUS_SUCCESS;
break;
}
pAttr = (PUSHORT)(pCoord + 1);
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
{
vidmem = DeviceExtension->VideoMemory;
offset = (dwCoord.X + dwCoord.Y * DeviceExtension->Columns) * 2 + 1;
nMaxLength = min(nMaxLength,
(DeviceExtension->Rows - dwCoord.Y)
* DeviceExtension->Columns - dwCoord.X);
for (dwCount = 0; dwCount < nMaxLength; dwCount++, pAttr++)
{
vidmem[offset + (dwCount * 2)] = *((PCHAR)pAttr);
}
Irp->IoStatus.Information = dwCount * sizeof(USHORT);
}
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_SET_TEXT_ATTRIBUTE:
{
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(USHORT))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
DeviceExtension->CharAttribute = *(PUSHORT)Irp->AssociatedIrp.SystemBuffer;
Irp->IoStatus.Information = 0;
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_FILL_OUTPUT_CHARACTER:
{
POUTPUT_CHARACTER Buf;
PUCHAR vidmem;
ULONG offset;
ULONG dwCount;
ULONG nMaxLength;
/* Validate input and output buffers */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(OUTPUT_CHARACTER) ||
stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(OUTPUT_CHARACTER))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
Buf = (POUTPUT_CHARACTER)Irp->AssociatedIrp.SystemBuffer;
nMaxLength = Buf->nLength;
Buf->dwTransfered = 0;
Irp->IoStatus.Information = sizeof(OUTPUT_CHARACTER);
if ( Buf->dwCoord.X < 0 || Buf->dwCoord.X >= DeviceExtension->Columns ||
Buf->dwCoord.Y < 0 || Buf->dwCoord.Y >= DeviceExtension->Rows ||
nMaxLength == 0 )
{
Status = STATUS_SUCCESS;
break;
}
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
{
UCHAR ch = Buf->cCharacter;
vidmem = DeviceExtension->VideoMemory;
offset = (Buf->dwCoord.X + Buf->dwCoord.Y * DeviceExtension->Columns) * 2;
nMaxLength = min(nMaxLength,
(DeviceExtension->Rows - Buf->dwCoord.Y)
* DeviceExtension->Columns - Buf->dwCoord.X);
for (dwCount = 0; dwCount < nMaxLength; dwCount++)
{
vidmem[offset + (dwCount * 2)] = ch;
}
Buf->dwTransfered = dwCount;
}
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_READ_OUTPUT_CHARACTER:
{
POUTPUT_CHARACTER Buf;
PCHAR pChar;
PUCHAR vidmem;
ULONG offset;
ULONG dwCount;
ULONG nMaxLength;
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < sizeof(OUTPUT_CHARACTER))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
Buf = (POUTPUT_CHARACTER)Irp->AssociatedIrp.SystemBuffer;
Irp->IoStatus.Information = 0;
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength == 0)
{
Status = STATUS_SUCCESS;
break;
}
ASSERT(Irp->MdlAddress);
pChar = MmGetSystemAddressForMdlSafe(Irp->MdlAddress, NormalPagePriority);
if (pChar == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
break;
}
if ( Buf->dwCoord.X < 0 || Buf->dwCoord.X >= DeviceExtension->Columns ||
Buf->dwCoord.Y < 0 || Buf->dwCoord.Y >= DeviceExtension->Rows )
{
Status = STATUS_SUCCESS;
break;
}
nMaxLength = stk->Parameters.DeviceIoControl.OutputBufferLength;
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
{
vidmem = DeviceExtension->VideoMemory;
offset = (Buf->dwCoord.X + Buf->dwCoord.Y * DeviceExtension->Columns) * 2;
nMaxLength = min(nMaxLength,
(DeviceExtension->Rows - Buf->dwCoord.Y)
* DeviceExtension->Columns - Buf->dwCoord.X);
for (dwCount = 0; dwCount < nMaxLength; dwCount++, pChar++)
{
*pChar = vidmem[offset + (dwCount * 2)];
}
Irp->IoStatus.Information = dwCount * sizeof(CHAR);
}
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_WRITE_OUTPUT_CHARACTER:
{
COORD dwCoord;
PCOORD pCoord;
PCHAR pChar;
PUCHAR vidmem;
ULONG offset;
ULONG dwCount;
ULONG nMaxLength;
//
// NOTE: For whatever reason no OUTPUT_CHARACTER structure
// is used for this IOCTL.
//
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(COORD))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->MdlAddress);
pCoord = MmGetSystemAddressForMdlSafe(Irp->MdlAddress, NormalPagePriority);
if (pCoord == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
break;
}
/* Capture the input info data */
dwCoord = *pCoord;
nMaxLength = stk->Parameters.DeviceIoControl.OutputBufferLength - sizeof(COORD);
Irp->IoStatus.Information = 0;
if ( dwCoord.X < 0 || dwCoord.X >= DeviceExtension->Columns ||
dwCoord.Y < 0 || dwCoord.Y >= DeviceExtension->Rows ||
nMaxLength == 0 )
{
Status = STATUS_SUCCESS;
break;
}
pChar = (PCHAR)(pCoord + 1);
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
{
vidmem = DeviceExtension->VideoMemory;
offset = (dwCoord.X + dwCoord.Y * DeviceExtension->Columns) * 2;
nMaxLength = min(nMaxLength,
(DeviceExtension->Rows - dwCoord.Y)
* DeviceExtension->Columns - dwCoord.X);
for (dwCount = 0; dwCount < nMaxLength; dwCount++, pChar++)
{
vidmem[offset + (dwCount * 2)] = *pChar;
}
Irp->IoStatus.Information = dwCount * sizeof(CHAR);
}
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_DRAW:
{
CONSOLE_DRAW ConsoleDraw;
PCONSOLE_DRAW pConsoleDraw;
PUCHAR Src, Dest;
UINT32 SrcDelta, DestDelta, i;
/* Validate output buffer */
if (stk->Parameters.DeviceIoControl.OutputBufferLength < sizeof(CONSOLE_DRAW))
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->MdlAddress);
pConsoleDraw = MmGetSystemAddressForMdlSafe(Irp->MdlAddress, NormalPagePriority);
if (pConsoleDraw == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
break;
}
/* Capture the input info data */
ConsoleDraw = *pConsoleDraw;
/* Check whether we have the size for the header plus the data area */
if ((stk->Parameters.DeviceIoControl.OutputBufferLength - sizeof(CONSOLE_DRAW)) / 2
< ((ULONG)ConsoleDraw.SizeX * (ULONG)ConsoleDraw.SizeY))
{
Status = STATUS_INVALID_BUFFER_SIZE;
break;
}
Irp->IoStatus.Information = 0;
/* Set the cursor position, clipping it to the screen */
DeviceExtension->CursorX = min(max(ConsoleDraw.CursorX, 0), DeviceExtension->Columns - 1);
DeviceExtension->CursorY = min(max(ConsoleDraw.CursorY, 0), DeviceExtension->Rows - 1);
if (DeviceExtension->Enabled)
ScrSetCursor(DeviceExtension);
// TODO: For the moment if the ConsoleDraw rectangle has borders
// out of the screen-buffer we just bail out. Would it be better
// to actually clip the rectangle within its borders instead?
if ( ConsoleDraw.X < 0 || ConsoleDraw.X >= DeviceExtension->Columns ||
ConsoleDraw.Y < 0 || ConsoleDraw.Y >= DeviceExtension->Rows )
{
Status = STATUS_SUCCESS;
break;
}
if ( ConsoleDraw.SizeX > DeviceExtension->Columns - ConsoleDraw.X ||
ConsoleDraw.SizeY > DeviceExtension->Rows - ConsoleDraw.Y )
{
Status = STATUS_SUCCESS;
break;
}
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
{
Src = (PUCHAR)(pConsoleDraw + 1);
SrcDelta = ConsoleDraw.SizeX * 2;
Dest = DeviceExtension->VideoMemory +
(ConsoleDraw.X + ConsoleDraw.Y * DeviceExtension->Columns) * 2;
DestDelta = DeviceExtension->Columns * 2;
/* 2 == sizeof(CHAR) + sizeof(BYTE) */
/* Copy each line */
for (i = 0; i < ConsoleDraw.SizeY; i++)
{
RtlCopyMemory(Dest, Src, SrcDelta);
Src += SrcDelta;
Dest += DestDelta;
}
}
Status = STATUS_SUCCESS;
break;
}
case IOCTL_CONSOLE_LOADFONT:
{
//
// FIXME: For the moment we support only a fixed 256-char 8-bit font.
//
/* Validate input buffer */
if (stk->Parameters.DeviceIoControl.InputBufferLength < 256 * 8)
{
Status = STATUS_INVALID_PARAMETER;
break;
}
ASSERT(Irp->AssociatedIrp.SystemBuffer);
if (DeviceExtension->FontBitfield)
ExFreePoolWithTag(DeviceExtension->FontBitfield, TAG_BLUE);
DeviceExtension->FontBitfield = ExAllocatePoolWithTag(NonPagedPool, 256 * 8, TAG_BLUE);
if (!DeviceExtension->FontBitfield)
{
Status = STATUS_NO_MEMORY;
break;
}
RtlCopyMemory(DeviceExtension->FontBitfield, Irp->AssociatedIrp.SystemBuffer, 256 * 8);
/* Set the font if needed */
if (DeviceExtension->Enabled && DeviceExtension->VideoMemory)
ScrSetFont(DeviceExtension->FontBitfield);
Irp->IoStatus.Information = 0;
Status = STATUS_SUCCESS;
break;
}
default:
Status = STATUS_NOT_IMPLEMENTED;
}
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_VIDEO_INCREMENT);
return Status;
}
static DRIVER_DISPATCH ScrDispatch;
static NTSTATUS
NTAPI
ScrDispatch(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ PIRP Irp)
{
PIO_STACK_LOCATION stk = IoGetCurrentIrpStackLocation(Irp);
UNREFERENCED_PARAMETER(DeviceObject);
DPRINT1("ScrDispatch(0x%p): stk->MajorFunction = %lu UNIMPLEMENTED\n",
DeviceObject, stk->MajorFunction);
Irp->IoStatus.Status = STATUS_NOT_IMPLEMENTED;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_NOT_IMPLEMENTED;
}
/*
* Module entry point
*/
NTSTATUS
NTAPI
DriverEntry(
_In_ PDRIVER_OBJECT DriverObject,
_In_ PUNICODE_STRING RegistryPath)
{
NTSTATUS Status;
PDEVICE_OBJECT DeviceObject;
UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Device\\BlueScreen");
UNICODE_STRING SymlinkName = RTL_CONSTANT_STRING(L"\\??\\BlueScreen");
DPRINT("Screen Driver 0.0.6\n");
DriverObject->MajorFunction[IRP_MJ_CREATE] = ScrCreateClose;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = ScrCreateClose;
DriverObject->MajorFunction[IRP_MJ_READ] = ScrDispatch;
DriverObject->MajorFunction[IRP_MJ_WRITE] = ScrWrite;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = ScrIoControl;
Status = IoCreateDevice(DriverObject,
sizeof(DEVICE_EXTENSION),
&DeviceName,
FILE_DEVICE_SCREEN,
FILE_DEVICE_SECURE_OPEN,
TRUE,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
return Status;
}
Status = IoCreateSymbolicLink(&SymlinkName, &DeviceName);
if (NT_SUCCESS(Status))
{
/* By default disable the screen (but don't touch INBV: ResetDisplayParametersDeviceExtension is still NULL) */
ScrResetScreen(DeviceObject->DeviceExtension, TRUE, FALSE);
/* Now set ResetDisplayParametersDeviceExtension to enable synchronizing with INBV */
ResetDisplayParametersDeviceExtension = DeviceObject->DeviceExtension;
DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
}
else
{
IoDeleteDevice(DeviceObject);
}
return Status;
}
/* EOF */