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[NTVDM]: Implement double-width and double-height separately; used when eg. an app displays in 640*180, etc...

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svn path=/trunk/; revision=64748
This commit is contained in:
Hermès Bélusca-Maïto 2014-10-15 00:42:19 +00:00
parent 1fd3e7e17e
commit 724f87c880
1 changed files with 47 additions and 20 deletions
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67
reactos/subsystems/ntvdm/hardware/vga.c
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@ -240,7 +240,9 @@ static HANDLE TextConsoleBuffer = NULL;
/* Graphics mode */
static HANDLE GraphicsConsoleBuffer = NULL;
static HANDLE ConsoleMutex = NULL;
static BOOLEAN DoubleVision = FALSE;
/* DoubleVision support */
static BOOLEAN DoubleWidth = FALSE;
static BOOLEAN DoubleHeight = FALSE;
/*
* VGA Hardware
@ -964,16 +966,10 @@ static BOOL VgaEnterGraphicsMode(PCOORD Resolution)
LONG Height = Resolution->Y;
/* Use DoubleVision mode if the resolution is too small */
if (Width < VGA_MINIMUM_WIDTH && Height < VGA_MINIMUM_HEIGHT)
{
DoubleVision = TRUE;
Width *= 2;
Height *= 2;
}
else
{
DoubleVision = FALSE;
}
DoubleWidth = (Width < VGA_MINIMUM_WIDTH);
if (DoubleWidth) Width *= 2;
DoubleHeight = (Height < VGA_MINIMUM_HEIGHT);
if (DoubleHeight) Height *= 2;
/* Fill the bitmap info header */
RtlZeroMemory(&BitmapInfo->bmiHeader, sizeof(BitmapInfo->bmiHeader));
@ -1036,7 +1032,9 @@ static VOID VgaLeaveGraphicsMode(VOID)
ConsoleFramebuffer = NULL;
CloseHandle(GraphicsConsoleBuffer);
GraphicsConsoleBuffer = NULL;
DoubleVision = FALSE;
DoubleWidth = FALSE;
DoubleHeight = FALSE;
}
static BOOL VgaEnterTextMode(PCOORD Resolution)
@ -1307,14 +1305,14 @@ static VOID VgaUpdateFramebuffer(VOID)
}
/* Take into account DoubleVision mode when checking for pixel updates */
if (DoubleVision)
if (DoubleWidth && DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[(i * Resolution.X * 4) + (j * 2)] != PixelData)
if (GraphicsBuffer[(i * 2 * Resolution.X * 2) + (j * 2)] != PixelData)
{
/* Yes, write the new value */
GraphicsBuffer[(i * Resolution.X * 4) + (j * 2)] = PixelData;
GraphicsBuffer[(i * Resolution.X * 4) + (j * 2 + 1)] = PixelData;
GraphicsBuffer[(i * 2 * Resolution.X * 2) + (j * 2)] = PixelData;
GraphicsBuffer[(i * 2 * Resolution.X * 2) + (j * 2 + 1)] = PixelData;
GraphicsBuffer[((i * 2 + 1) * Resolution.X * 2) + (j * 2)] = PixelData;
GraphicsBuffer[((i * 2 + 1) * Resolution.X * 2) + (j * 2 + 1)] = PixelData;
@ -1322,7 +1320,33 @@ static VOID VgaUpdateFramebuffer(VOID)
VgaMarkForUpdate(i, j);
}
}
else
else if (DoubleWidth && !DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[(i * Resolution.X * 2) + (j * 2)] != PixelData)
{
/* Yes, write the new value */
GraphicsBuffer[(i * Resolution.X * 2) + (j * 2)] = PixelData;
GraphicsBuffer[(i * Resolution.X * 2) + (j * 2 + 1)] = PixelData;
/* Mark the specified pixel as changed */
VgaMarkForUpdate(i, j);
}
}
else if (!DoubleWidth && DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[(i * 2 * Resolution.X) + j] != PixelData)
{
/* Yes, write the new value */
GraphicsBuffer[(i * 2 * Resolution.X) + j] = PixelData;
GraphicsBuffer[((i * 2 + 1) * Resolution.X) + j] = PixelData;
/* Mark the specified pixel as changed */
VgaMarkForUpdate(i, j);
}
}
else // if (!DoubleWidth && !DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[i * Resolution.X + j] != PixelData)
@ -1797,11 +1821,14 @@ VOID VgaRefreshDisplay(VOID)
ConsoleBufferHandle = GraphicsConsoleBuffer;
/* In DoubleVision mode, scale the update rectangle */
if (DoubleVision)
if (DoubleWidth)
{
UpdateRectangle.Left *= 2;
UpdateRectangle.Top *= 2;
UpdateRectangle.Right = UpdateRectangle.Right * 2 + 1;
UpdateRectangle.Right = UpdateRectangle.Right * 2 + 1;
}
if (DoubleHeight)
{
UpdateRectangle.Top *= 2;
UpdateRectangle.Bottom = UpdateRectangle.Bottom * 2 + 1;
}
}