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[NTVDM]

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- Fix usage of the console framebuffer mutex (used only with graphics screen buffers).
- Do not check for text/graphics mode when updating each scan line, in VgaUpdateFramebuffer.

svn path=/branches/ntvdm/; revision=59673
This commit is contained in:
Hermès Bélusca-Maïto 2013-08-09 00:13:54 +00:00
parent 12b2347206
commit bd75425efd
1 changed files with 38 additions and 15 deletions
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53
subsystems/ntvdm/vga.c
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@ -265,11 +265,15 @@ static BOOL VgaEnterGraphicsMode(PCOORD Resolution)
static VOID VgaLeaveGraphicsMode(VOID)
{
/* Release the console framebuffer mutex if needed */
ReleaseMutex(ConsoleMutex);
/* Switch back to the text buffer */
SetConsoleActiveScreenBuffer(TextConsoleBuffer);
/* Cleanup the video data */
CloseHandle(ConsoleMutex);
ConsoleMutex = NULL;
CloseHandle(GraphicsConsoleBuffer);
GraphicsConsoleBuffer = NULL;
}
@ -350,17 +354,22 @@ static VOID VgaUpdateFramebuffer(VOID)
DWORD Address = (VgaCrtcRegisters[VGA_CRTC_START_ADDR_HIGH_REG] << 8)
+ VgaCrtcRegisters[VGA_CRTC_START_ADDR_LOW_REG];
DWORD ScanlineSize = (DWORD)VgaCrtcRegisters[VGA_CRTC_OFFSET_REG] * 2;
PCHAR_INFO CharBuffer = (PCHAR_INFO)ConsoleFramebuffer;
PBYTE GraphicsBuffer = (PBYTE)ConsoleFramebuffer;
/* Loop through the scanlines */
for (i = 0; i < Resolution.Y; i++)
/* Check if this is text mode or graphics mode */
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
{
/* Check if this is text mode or graphics mode */
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
{
/* Graphics mode */
/* Graphics mode */
PBYTE GraphicsBuffer = (PBYTE)ConsoleFramebuffer;
/*
* Synchronize access to the graphics framebuffer
* with the console framebuffer mutex.
*/
WaitForSingleObject(ConsoleMutex, INFINITE);
/* Loop through the scanlines */
for (i = 0; i < Resolution.Y; i++)
{
/* Loop through the pixels */
for (j = 0; j < Resolution.X; j++)
{
@ -460,11 +469,25 @@ static VOID VgaUpdateFramebuffer(VOID)
VgaMarkForUpdate(i, j);
}
}
}
else
{
/* Text mode */
/* Move to the next scanline */
Address += ScanlineSize;
}
/*
* Release the console framebuffer mutex
* so that we allow for repainting.
*/
ReleaseMutex(ConsoleMutex);
}
else
{
/* Text mode */
PCHAR_INFO CharBuffer = (PCHAR_INFO)ConsoleFramebuffer;
/* Loop through the scanlines */
for (i = 0; i < Resolution.Y; i++)
{
/* Loop through the characters */
for (j = 0; j < Resolution.X; j++)
{
@ -488,10 +511,10 @@ static VOID VgaUpdateFramebuffer(VOID)
VgaMarkForUpdate(i, j);
}
}
}
/* Move to the next scanline */
Address += ScanlineSize;
/* Move to the next scanline */
Address += ScanlineSize;
}
}
}