Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-02-22 16:36:33 +00:00
Code Issues Projects Releases Packages Wiki Activity

[NTVDM]

Browse source 
Factor the shift of the interlaced high bit out of the for(...) loop (since the interlaced high bit is not modified anymore after), and add extra parentheses.

svn path=/trunk/; revision=63209
This commit is contained in:
Hermès Bélusca-Maïto 2014-05-09 22:07:49 +00:00
parent d34fb08d13
commit b9cff19fca
1 changed files with 8 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
reactos/subsystems/ntvdm/hardware/vga.c
View file

@ -1136,6 +1136,7 @@ static VOID VgaUpdateFramebuffer(VOID)
{
/* Graphics mode */
PBYTE GraphicsBuffer = (PBYTE)ConsoleFramebuffer;
DWORD InterlaceHighBit = VGA_INTERLACE_HIGH_BIT;
/*
* Synchronize access to the graphics framebuffer
@ -1143,17 +1144,15 @@ static VOID VgaUpdateFramebuffer(VOID)
*/
WaitForSingleObject(ConsoleMutex, INFINITE);
/* Shift the high bit right by 1 in odd/even mode */
if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
InterlaceHighBit >>= 1;
}
/* Loop through the scanlines */
for (i = 0; i < Resolution.Y; i++)
{
DWORD InterlaceHighBit = VGA_INTERLACE_HIGH_BIT;
if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
/* Shift the high bit right by 1 in odd/even mode */
InterlaceHighBit >>= 1;
}
if ((VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_OE) && (i & 1))
{
/* Odd-numbered line in interlaced mode - set the high bit */
@ -1309,7 +1308,7 @@ static VOID VgaUpdateFramebuffer(VOID)
}
}
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_OE && (i & 1))
if ((VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_OE) && (i & 1))
{
/* Clear the high bit */
Address &= ~InterlaceHighBit;