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[NTVDM]: Further modularize initialization/resetting of the VGA palette code.

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svn path=/branches/ntvdm/; revision=60887
This commit is contained in:
Hermès Bélusca-Maïto 2013-11-08 20:06:10 +00:00
parent fd61c2cba3
commit 3a1ae6ee3b
1 changed files with 57 additions and 52 deletions
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109
subsystems/ntvdm/vga.c
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@ -381,6 +381,57 @@ static VOID VgaWriteAc(BYTE Data)
}
}
static VOID VgaRestoreDefaultPalette(PPALETTEENTRY Entries, USHORT NumOfEntries)
{
USHORT i;
/* Copy the colors of the default palette to the DAC and console palette */
for (i = 0; i < NumOfEntries; 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]));
}
}
static BOOLEAN VgaInitializePalette(VOID)
{
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;
/* Restore the default palette */
VgaRestoreDefaultPalette(Palette->palPalEntry, Palette->palNumEntries);
/* 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;
/* ... otherwise return success */
return TRUE;
}
static BOOL VgaEnterGraphicsMode(PCOORD Resolution)
{
DWORD i;
@ -472,8 +523,8 @@ static BOOL VgaEnterTextMode(PCOORD Resolution)
* 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
* we get the default palette and our external behaviour is
* just like Windows' one), but it should success on ReactOS
* (so that we get console palette changes even for text-mode
* screen-buffers, which is a new feature on ReactOS).
*/
@ -1197,23 +1248,10 @@ VOID VgaClearMemory(VOID)
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]));
}
/* Restore the default palette */
VgaRestoreDefaultPalette(Entries, VGA_MAX_COLORS);
SetPaletteEntries(PaletteHandle, 0, VGA_MAX_COLORS, Entries);
PaletteChanged = TRUE;
@ -1230,42 +1268,9 @@ BOOLEAN VgaInitialize(HANDLE TextHandle)
PCHAR_INFO CharBuffer;
DWORD Address = 0;
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;
/* Initialize the VGA palette and fail if it isn't successfully created */
if (!VgaInitializePalette()) return FALSE;
/* Set the global handle */
TextConsoleBuffer = TextHandle;