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[0.4.7][BLUE] Optimize ScrIoControl for speed (#5185)

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Optimize IOCTL_CONSOLE_FILL_OUTPUT_ATTRIBUTE and IOCTL_CONSOLE_FILL_OUTPUT_CHARACTER for speed by using cache.
a part of CORE-18838
It is faster because it minimizes the amount of pointer dereferences within the for-loops.

fix picked from 0.4.15-dev-5881-g 3526ffc094
---------
also partially pick unrelated cleanup from:
0.4.14-dev-439-g 75f188c200 (only the change in blue.c)
---------
and take back with me some whitespace-tweaks to bring the file closer to todays releases/0.4.14
This commit is contained in:
Joachim Henze 2023-06-06 23:45:20 +02:00
parent 5e8c720402
commit a373df0d07
1 changed files with 129 additions and 141 deletions
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44
drivers/setup/blue/blue.c
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@ -1,11 +1,8 @@
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: services/dd/blue/blue.c
* PURPOSE: Console (blue screen) device driver
* PURPOSE: Driver Management Functions.
* PROGRAMMER: Eric Kohl
* UPDATE HISTORY:
* ??? Created
*/
/* INCLUDES ******************************************************************/
@ -15,20 +12,11 @@
#define NDEBUG
#include <debug.h>
// ROS Internal. Please deprecate.
NTHALAPI
BOOLEAN
NTAPI
HalQueryDisplayOwnership(
VOID
);
/* NOTES ******************************************************************/
/*
* [[character][attribute]][[character][attribute]]....
*/
/* TYPEDEFS ***************************************************************/
typedef struct _DEVICE_EXTENSION
@ -139,7 +127,7 @@ ScrSetRegisters(const VGA_REGISTERS *Registers)
WRITE_PORT_UCHAR(ATTRIB, Registers->Attribute[i]);
}
/* Set the PEL mask. */
/* Set the PEL mask */
WRITE_PORT_UCHAR(PELMASK, 0xff);
}
@ -152,7 +140,7 @@ ScrAcquireOwnership(PDEVICE_EXTENSION DeviceExtension)
ScrSetRegisters(&VidpMode3Regs);
/* Disable screen and enable palette access. */
/* Disable screen and enable palette access */
READ_PORT_UCHAR(STATUS);
WRITE_PORT_UCHAR(ATTRIB, 0x00);
@ -164,7 +152,7 @@ ScrAcquireOwnership(PDEVICE_EXTENSION DeviceExtension)
WRITE_PORT_UCHAR(PELDATA, DefaultPalette[Index * 3 + 2] >> 2);
}
/* Enable screen and disable palette access. */
/* Enable screen and disable palette access */
READ_PORT_UCHAR(STATUS);
WRITE_PORT_UCHAR(ATTRIB, 0x20);
@ -205,8 +193,7 @@ ScrAcquireOwnership(PDEVICE_EXTENSION DeviceExtension)
data | ((DeviceExtension->ScanLines - 1) & 0x1F));
/* calculate number of text rows */
DeviceExtension->Rows =
DeviceExtension->Rows / DeviceExtension->ScanLines;
DeviceExtension->Rows = DeviceExtension->Rows / DeviceExtension->ScanLines;
#ifdef BOCHS_30ROWS
DeviceExtension->Rows = 30;
#endif
@ -242,7 +229,7 @@ ScrCreate(PDEVICE_OBJECT DeviceObject,
}
else
{
/* store dummy values here */
/* Store dummy values */
DeviceExtension->Columns = 1;
DeviceExtension->Rows = 1;
DeviceExtension->ScanLines = 1;
@ -261,7 +248,7 @@ ScrCreate(PDEVICE_OBJECT DeviceObject,
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return (Status);
return Status;
}
static DRIVER_DISPATCH ScrWrite;
@ -304,7 +291,7 @@ ScrWrite(PDEVICE_OBJECT DeviceObject,
cursory = offset / columns;
cursorx = offset % columns;
if( processed == 0 )
if (!processed)
{
/* raw output mode */
memcpy( &vidmem[(cursorx * 2) + (cursory * columns * 2)], pch, stk->Parameters.Write.Length );
@ -403,7 +390,7 @@ ScrWrite(PDEVICE_OBJECT DeviceObject,
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return (Status);
return Status;
}
static DRIVER_DISPATCH ScrIoControl;
@ -565,13 +552,15 @@ ScrIoControl(PDEVICE_OBJECT DeviceObject,
if (!InbvCheckDisplayOwnership())
{
UCHAR attr = Buf->wAttribute;
vidmem = DeviceExtension->VideoMemory;
offset = (Buf->dwCoord.Y * DeviceExtension->Columns * 2) +
(Buf->dwCoord.X * 2) + 1;
for (dwCount = 0; dwCount < Buf->nLength; dwCount++)
{
vidmem[offset + (dwCount * 2)] = (char) Buf->wAttribute;
vidmem[offset + (dwCount * 2)] = attr;
}
}
@ -653,6 +642,8 @@ ScrIoControl(PDEVICE_OBJECT DeviceObject,
if (!InbvCheckDisplayOwnership())
{
UCHAR ch = Buf->cCharacter;
vidmem = DeviceExtension->VideoMemory;
offset = (Buf->dwCoord.Y * DeviceExtension->Columns * 2) +
(Buf->dwCoord.X * 2);
@ -660,7 +651,7 @@ ScrIoControl(PDEVICE_OBJECT DeviceObject,
for (dwCount = 0; dwCount < Buf->nLength; dwCount++)
{
vidmem[offset + (dwCount * 2)] = (char) Buf->cCharacter;
vidmem[offset + (dwCount * 2)] = ch;
}
}
@ -811,14 +802,12 @@ ScrDispatch(PDEVICE_OBJECT DeviceObject,
break;
}
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return (Status);
return Status;
}
/*
* Module entry point
*/
@ -845,7 +834,6 @@ DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
FILE_DEVICE_SECURE_OPEN,
TRUE,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
return Status;