Author: aandrejevic
Date: Fri Nov 8 21:56:30 2013
New Revision: 60888
URL: http://svn.reactos.org/svn/reactos?rev=60888&view=rev
Log:
[NTVDM]
For better visibility, double the screen size if the resolution is too low.
Modified:
branches/ntvdm/subsystems/ntvdm/vga.c
branches/ntvdm/subsystems/ntvdm/vga.h
Modified: branches/ntvdm/subsystems/ntvdm/vga.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/vga.c?rev=60888&r1=60887&r2=60888&view=diff
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/vga.c [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/vga.c [iso-8859-1] Fri Nov 8
21:56:30 2013
@@ -92,6 +92,7 @@
static HANDLE GraphicsConsoleBuffer = NULL;
static HANDLE ConsoleMutex = NULL;
static HPALETTE PaletteHandle = NULL;
+static BOOLEAN DoubleVision = FALSE;
static BYTE VgaLatchRegisters[VGA_NUM_BANKS] = {0, 0, 0, 0};
static BYTE VgaMiscRegister;
@@ -439,6 +440,13 @@
BYTE BitmapInfoBuffer[VGA_BITMAP_INFO_SIZE];
LPBITMAPINFO BitmapInfo = (LPBITMAPINFO)BitmapInfoBuffer;
LPWORD PaletteIndex = (LPWORD)(BitmapInfo->bmiColors);
+
+ if ((Resolution->X < VGA_MINIMUM_WIDTH) && (Resolution->Y <
VGA_MINIMUM_HEIGHT))
+ {
+ DoubleVision = TRUE;
+ Resolution->X *= 2;
+ Resolution->Y *= 2;
+ }
/* Fill the bitmap info header */
ZeroMemory(&BitmapInfo->bmiHeader, sizeof(BITMAPINFOHEADER));
@@ -500,6 +508,7 @@
ConsoleMutex = NULL;
CloseHandle(GraphicsConsoleBuffer);
GraphicsConsoleBuffer = NULL;
+ DoubleVision = FALSE;
}
static BOOL VgaEnterTextMode(PCOORD Resolution)
@@ -738,14 +747,32 @@
PixelData = VgaAcRegisters[PixelData];
}
- /* Now check if the resulting pixel data has changed */
- if (GraphicsBuffer[i * Resolution.X + j] != PixelData)
+ if (DoubleVision)
{
- /* Yes, write the new value */
- GraphicsBuffer[i * Resolution.X + j] = PixelData;
-
- /* Mark the specified pixel as changed */
- VgaMarkForUpdate(i, j);
+ /* Now check if the resulting pixel data has changed */
+ if (GraphicsBuffer[(i * Resolution.X * 4) + (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 + 1) * Resolution.X * 2) + (j *
2)] = PixelData;
+ GraphicsBuffer[((i * 2 + 1) * Resolution.X * 2) + (j *
2 + 1)] = PixelData;
+
+ /* Mark the specified pixel as changed */
+ VgaMarkForUpdate(i, j);
+ }
+ }
+ else
+ {
+ /* Now check if the resulting pixel data has changed */
+ if (GraphicsBuffer[i * Resolution.X + j] != PixelData)
+ {
+ /* Yes, write the new value */
+ GraphicsBuffer[i * Resolution.X + j] = PixelData;
+
+ /* Mark the specified pixel as changed */
+ VgaMarkForUpdate(i, j);
+ }
}
}
@@ -952,6 +979,15 @@
Resolution,
Origin,
&UpdateRectangle);
+ }
+
+ if (DoubleVision)
+ {
+ /* Scale the update rectangle */
+ UpdateRectangle.Left *= 2;
+ UpdateRectangle.Top *= 2;
+ UpdateRectangle.Right = UpdateRectangle.Right * 2 + 1;
+ UpdateRectangle.Bottom = UpdateRectangle.Bottom * 2 + 1;
}
/* Redraw the screen */
Modified: branches/ntvdm/subsystems/ntvdm/vga.h
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/vga.h?rev=60888&r1=60887&r2=60888&view=diff
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/vga.h [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/vga.h [iso-8859-1] Fri Nov 8
21:56:30 2013
@@ -38,6 +38,8 @@
#define VGA_MAX_COLORS 256
#define VGA_PALETTE_SIZE (VGA_MAX_COLORS * 3)
#define VGA_BITMAP_INFO_SIZE (sizeof(BITMAPINFOHEADER) + 2 * (VGA_PALETTE_SIZE
/ 3))
+#define VGA_MINIMUM_WIDTH 400
+#define VGA_MINIMUM_HEIGHT 300
#define VGA_DAC_TO_COLOR(x) (((x) << 2) | ((x) >> 6))
#define VGA_COLOR_TO_DAC(x) ((x) >> 2)
