Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-10-09 02:35:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

[NTVDM]

Browse source 
Implement the use of palettes for text mode. Adapted from a patch by Hermes Belusca-Maito.
Reset the palette during every BIOS video mode switch.


svn path=/branches/ntvdm/; revision=60886
This commit is contained in:
Aleksandar Andrejevic 2013-11-08 19:30:58 +00:00
parent 4f4d9fe5d2
commit fd61c2cba3
3 changed files with 96 additions and 47 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
subsystems/ntvdm/bios.c
View file

@ -415,6 +415,9 @@ BOOLEAN BiosSetVideoMode(BYTE ModeNumber)
VgaWritePort(VGA_AC_WRITE, *(Values++));
}
/* Reset the palette */
VgaResetPalette();
/* Update the values in the BDA */
Bda->VideoMode = ModeNumber;
Bda->VideoPage = 0;

127
subsystems/ntvdm/vga.c
View file

@ -373,6 +373,12 @@ static VOID VgaWriteAc(BYTE Data)
/* Save the value */
VgaAcRegisters[VgaAcIndex] = Data;
if (VgaAcIndex <= VGA_AC_PAL_F_REG)
{
/* Set the palette change flag */
PaletteChanged = TRUE;
}
}
static BOOL VgaEnterGraphicsMode(PCOORD Resolution)
@ -462,6 +468,19 @@ static BOOL VgaEnterTextMode(PCOORD Resolution)
return FALSE;
}
/*
* Set the text mode palette.
*
* WARNING: This call should fail on Windows (and therefore
* we get the default palette and we our external behaviour
* is just like Windows' one), but should success on ReactOS
* (so that we get console palette changes even for text-mode
* screen-buffers, which is a new feature on ReactOS).
*/
SetConsolePalette(TextConsoleBuffer,
PaletteHandle,
SYSPAL_NOSTATIC256);
/* Set the text mode flag */
TextMode = TRUE;
@ -826,6 +845,7 @@ COORD VgaGetDisplayResolution(VOID)
VOID VgaRefreshDisplay(VOID)
{
HANDLE ConsoleBufferHandle = NULL;
COORD Resolution = VgaGetDisplayResolution();
DPRINT("VgaRefreshDisplay\n");
@ -837,8 +857,6 @@ VOID VgaRefreshDisplay(VOID)
if (CursorMoved) VgaUpdateTextCursor();
if (PaletteChanged)
{
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
{
/* Trigger a full update of the screen */
NeedsUpdate = TRUE;
@ -846,7 +864,6 @@ VOID VgaRefreshDisplay(VOID)
UpdateRectangle.Top = 0;
UpdateRectangle.Right = Resolution.X;
UpdateRectangle.Bottom = Resolution.Y;
}
PaletteChanged = FALSE;
}
@ -870,14 +887,13 @@ VOID VgaRefreshDisplay(VOID)
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
{
/* Graphics mode */
/* Redraw the screen */
InvalidateConsoleDIBits(GraphicsConsoleBuffer, &UpdateRectangle);
ConsoleBufferHandle = GraphicsConsoleBuffer;
}
else
{
/* Text mode */
COORD Origin = { UpdateRectangle.Left, UpdateRectangle.Top };
ConsoleBufferHandle = TextConsoleBuffer;
/* Write the data to the console */
WriteConsoleOutputA(TextConsoleBuffer,
@ -885,9 +901,11 @@ VOID VgaRefreshDisplay(VOID)
Resolution,
Origin,
&UpdateRectangle);
}
/* Redraw the screen */
InvalidateConsoleDIBits(ConsoleBufferHandle, &UpdateRectangle);
/* Clear the update flag */
NeedsUpdate = FALSE;
}
@ -1177,6 +1195,30 @@ VOID VgaClearMemory(VOID)
ZeroMemory(VgaMemory, sizeof(VgaMemory));
}
VOID VgaResetPalette(VOID)
{
INT i;
PALETTEENTRY Entries[VGA_MAX_COLORS];
/* Copy the colors of the default palette to the DAC and console palette */
for (i = 0; i < VGA_MAX_COLORS; i++)
{
/* Set the palette entries */
Entries[i].peRed = GetRValue(VgaDefaultPalette[i]);
Entries[i].peGreen = GetGValue(VgaDefaultPalette[i]);
Entries[i].peBlue = GetBValue(VgaDefaultPalette[i]);
Entries[i].peFlags = 0;
/* Set the DAC registers */
VgaDacRegisters[i * 3] = VGA_COLOR_TO_DAC(GetRValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 1] = VGA_COLOR_TO_DAC(GetGValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 2] = VGA_COLOR_TO_DAC(GetBValue(VgaDefaultPalette[i]));
}
SetPaletteEntries(PaletteHandle, 0, VGA_MAX_COLORS, Entries);
PaletteChanged = TRUE;
}
BOOLEAN VgaInitialize(HANDLE TextHandle)
{
INT i, j;
@ -1190,6 +1232,41 @@ BOOLEAN VgaInitialize(HANDLE TextHandle)
DWORD CurrentAddr;
LPLOGPALETTE Palette;
/* Allocate storage space for the palette */
Palette = (LPLOGPALETTE)HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY,
sizeof(LOGPALETTE) +
VGA_MAX_COLORS * sizeof(PALETTEENTRY));
if (Palette == NULL) return FALSE;
/* Initialize the palette */
Palette->palVersion = 0x0300;
Palette->palNumEntries = VGA_MAX_COLORS;
/* Copy the colors of the default palette to the DAC and console palette */
for (i = 0; i < VGA_MAX_COLORS; i++)
{
/* Set the palette entries */
Palette->palPalEntry[i].peRed = GetRValue(VgaDefaultPalette[i]);
Palette->palPalEntry[i].peGreen = GetGValue(VgaDefaultPalette[i]);
Palette->palPalEntry[i].peBlue = GetBValue(VgaDefaultPalette[i]);
Palette->palPalEntry[i].peFlags = 0;
/* Set the DAC registers */
VgaDacRegisters[i * 3] = VGA_COLOR_TO_DAC(GetRValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 1] = VGA_COLOR_TO_DAC(GetGValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 2] = VGA_COLOR_TO_DAC(GetBValue(VgaDefaultPalette[i]));
}
/* Create the palette */
PaletteHandle = CreatePalette(Palette);
/* Free the palette */
HeapFree(GetProcessHeap(), 0, Palette);
/* Fail if the palette wasn't successfully created */
if (PaletteHandle == NULL) return FALSE;
/* Set the global handle */
TextConsoleBuffer = TextHandle;
@ -1235,40 +1312,8 @@ BOOLEAN VgaInitialize(HANDLE TextHandle)
Address += ScanlineSize;
}
/* Allocate storage space for the palette */
Palette = (LPLOGPALETTE)HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY,
sizeof(LOGPALETTE)
+ VGA_MAX_COLORS * sizeof(PALETTEENTRY));
if (Palette == NULL) return FALSE;
/* Initialize the palette */
Palette->palVersion = 0x0300;
Palette->palNumEntries = VGA_MAX_COLORS;
/* Copy the colors of the default palette to the DAC and console palette */
for (i = 0; i < VGA_MAX_COLORS; i++)
{
/* Set the palette entries */
Palette->palPalEntry[i].peRed = GetRValue(VgaDefaultPalette[i]);
Palette->palPalEntry[i].peGreen = GetGValue(VgaDefaultPalette[i]);
Palette->palPalEntry[i].peBlue = GetBValue(VgaDefaultPalette[i]);
Palette->palPalEntry[i].peFlags = 0;
/* Set the DAC registers */
VgaDacRegisters[i * 3] = VGA_COLOR_TO_DAC(GetRValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 1] = VGA_COLOR_TO_DAC(GetGValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 2] = VGA_COLOR_TO_DAC(GetBValue(VgaDefaultPalette[i]));
}
/* Create the palette */
PaletteHandle = CreatePalette(Palette);
/* Free the palette */
HeapFree(GetProcessHeap(), 0, Palette);
/* Return success if the palette was successfully created */
return (PaletteHandle ? TRUE : FALSE);
/* Return success */
return TRUE;
}
/* EOF */

1
subsystems/ntvdm/vga.h
View file

@ -200,6 +200,7 @@ VOID VgaWriteMemory(DWORD Address, LPBYTE Buffer, DWORD Size);
BYTE VgaReadPort(WORD Port);
VOID VgaWritePort(WORD Port, BYTE Data);
VOID VgaClearMemory(VOID);
VOID VgaResetPalette(VOID);
BOOLEAN VgaInitialize(HANDLE TextHandle);
#endif // _VGA_H_