/******************************Module*Header*******************************\
* Module Name: palette.c
*
* Palette support.
*
* Copyright (c) 1992-1995 Microsoft Corporation
\**************************************************************************/
#include "precomp.h"
// Global Table defining the 20 Window default colours. For 256 colour
// palettes the first 10 must be put at the beginning of the palette
// and the last 10 at the end of the palette.
PALETTEENTRY gapalBase[20] =
{
{ 0, 0, 0, 0 }, // 0
{ 0x80,0, 0, 0 }, // 1
{ 0, 0x80,0, 0 }, // 2
{ 0x80,0x80,0, 0 }, // 3
{ 0, 0, 0x80,0 }, // 4
{ 0x80,0, 0x80,0 }, // 5
{ 0, 0x80,0x80,0 }, // 6
{ 0xC0,0xC0,0xC0,0 }, // 7
{ 192, 220, 192, 0 }, // 8
{ 166, 202, 240, 0 }, // 9
{ 255, 251, 240, 0 }, // 10
{ 160, 160, 164, 0 }, // 11
{ 0x80,0x80,0x80,0 }, // 12
{ 0xFF,0, 0 ,0 }, // 13
{ 0, 0xFF,0 ,0 }, // 14
{ 0xFF,0xFF,0 ,0 }, // 15
{ 0 ,0, 0xFF,0 }, // 16
{ 0xFF,0, 0xFF,0 }, // 17
{ 0, 0xFF,0xFF,0 }, // 18
{ 0xFF,0xFF,0xFF,0 }, // 19
};
/******************************Public*Routine******************************\
* BOOL bInitializePalette
*
* Initializes default palette for PDEV.
*
\**************************************************************************/
BOOL bInitializePalette(
PDEV* ppdev,
DEVINFO* pdi)
{
PALETTEENTRY* ppal;
PALETTEENTRY* ppalTmp;
ULONG ulLoop;
BYTE jRed;
BYTE jGre;
BYTE jBlu;
HPALETTE hpal;
if (ppdev->iBitmapFormat == BMF_8BPP)
{
// Allocate our palette:
ppal = AtiAllocMem(LPTR, FL_ZERO_MEMORY, sizeof(PALETTEENTRY) * 256);
if (ppal == NULL)
goto ReturnFalse;
ppdev->pPal = ppal;
// Generate 256 (8*4*4) RGB combinations to fill the palette
jRed = 0;
jGre = 0;
jBlu = 0;
ppalTmp = ppal;
for (ulLoop = 256; ulLoop != 0; ulLoop--)
{
ppalTmp->peRed = jRed;
ppalTmp->peGreen = jGre;
ppalTmp->peBlue = jBlu;
ppalTmp->peFlags = 0;
ppalTmp++;
if (!(jRed += 32))
if (!(jGre += 32))
jBlu += 64;
}
// Fill in Windows reserved colours from the WIN 3.0 DDK
// The Window Manager reserved the first and last 10 colours for
// painting windows borders and for non-palette managed applications.
for (ulLoop = 0; ulLoop < 10; ulLoop++)
{
// First 10
ppal[ulLoop] = gapalBase[ulLoop];
// Last 10
ppal[246 + ulLoop] = gapalBase[ulLoop+10];
}
// Create handle for palette.
hpal = EngCreatePalette(PAL_INDEXED, 256, (ULONG*) ppal, 0, 0, 0);
}
else
{
ASSERTDD((ppdev->iBitmapFormat == BMF_16BPP) ||
(ppdev->iBitmapFormat == BMF_24BPP) ||
(ppdev->iBitmapFormat == BMF_32BPP),
"This case handles only 16, 24 or 32bpp");
hpal = EngCreatePalette(PAL_BITFIELDS, 0, NULL,
ppdev->flRed, ppdev->flGreen, ppdev->flBlue);
}
ppdev->hpalDefault = hpal;
pdi->hpalDefault = hpal;
if (hpal == 0)
goto ReturnFalse;
return(TRUE);
ReturnFalse:
DISPDBG((0, "Failed bInitializePalette"));
return(FALSE);
}
/******************************Public*Routine******************************\
* VOID vUninitializePalette
*
* Frees resources allocated by bInitializePalette.
*
* Note: In an error case, this may be called before bInitializePalette.
*
\**************************************************************************/
VOID vUninitializePalette(PDEV* ppdev)
{
// Delete the default palette if we created one:
if (ppdev->hpalDefault != 0)
EngDeletePalette(ppdev->hpalDefault);
if (ppdev->pPal != (PALETTEENTRY*) NULL)
AtiFreeMem(ppdev->pPal);
}
/******************************Public*Routine******************************\
* BOOL bEnablePalette
*
* Initialize the hardware's 8bpp palette registers.
*
\**************************************************************************/
BOOL bEnablePalette(PDEV* ppdev)
{
BYTE ajClutSpace[MAX_CLUT_SIZE];
PVIDEO_CLUT pScreenClut;
ULONG ulReturnedDataLength;
ULONG cColors;
PVIDEO_CLUTDATA pScreenClutData;
if (ppdev->iBitmapFormat == BMF_8BPP)
{
// Fill in pScreenClut header info:
pScreenClut = (PVIDEO_CLUT) ajClutSpace;
pScreenClut->NumEntries = 256;
pScreenClut->FirstEntry = 0;
// Copy colours in:
cColors = 256;
pScreenClutData = (PVIDEO_CLUTDATA) (&(pScreenClut->LookupTable[0]));
while(cColors--)
{
pScreenClutData[cColors].Red = ppdev->pPal[cColors].peRed >>
ppdev->cPaletteShift;
pScreenClutData[cColors].Green = ppdev->pPal[cColors].peGreen >>
ppdev->cPaletteShift;
pScreenClutData[cColors].Blue = ppdev->pPal[cColors].peBlue >>
ppdev->cPaletteShift;
pScreenClutData[cColors].Unused = 0;
}
// Set palette registers:
if (!AtiDeviceIoControl(ppdev->hDriver,
IOCTL_VIDEO_SET_COLOR_REGISTERS,
pScreenClut,
MAX_CLUT_SIZE,
NULL,
0,
&ulReturnedDataLength))
{
DISPDBG((0, "Failed bEnablePalette"));
return(FALSE);
}
}
DISPDBG((5, "Passed bEnablePalette"));
return(TRUE);
}
/******************************Public*Routine******************************\
* VOID vDisablePalette
*
* Undoes anything done in bEnablePalette.
*
\**************************************************************************/
VOID vDisablePalette(
PDEV* ppdev)
{
// Nothin' to do
}
/******************************Public*Routine******************************\
* VOID vAssertModePalette
*
* Sets/resets the palette in preparation for full-screen/graphics mode.
*
\**************************************************************************/
VOID vAssertModePalette(
PDEV* ppdev,
BOOL bEnable)
{
// USER immediately calls DrvSetPalette after switching out of
// full-screen, so we don't have to worry about resetting the
// palette here.
}
/******************************Public*Routine******************************\
* BOOL DrvSetPalette
*
* DDI entry point for manipulating the palette.
*
\**************************************************************************/
BOOL DrvSetPalette(
DHPDEV dhpdev,
PALOBJ* ppalo,
FLONG fl,
ULONG iStart,
ULONG cColors)
{
BYTE ajClutSpace[MAX_CLUT_SIZE];
PVIDEO_CLUT pScreenClut;
PVIDEO_CLUTDATA pScreenClutData;
PDEV* ppdev;
UNREFERENCED_PARAMETER(fl);
ppdev = (PDEV*) dhpdev;
// Fill in pScreenClut header info:
pScreenClut = (PVIDEO_CLUT) ajClutSpace;
pScreenClut->NumEntries = (USHORT) cColors;
pScreenClut->FirstEntry = (USHORT) iStart;
pScreenClutData = (PVIDEO_CLUTDATA) (&(pScreenClut->LookupTable[0]));
if (cColors != PALOBJ_cGetColors(ppalo, iStart, cColors,
(ULONG*) pScreenClutData))
{
DISPDBG((0, "DrvSetPalette failed PALOBJ_cGetColors"));
return (FALSE);
}
// Set the high reserved byte in each palette entry to 0.
// Do the appropriate palette shifting to fit in the DAC.
if (ppdev->cPaletteShift)
{
while(cColors--)
{
pScreenClutData[cColors].Red >>= ppdev->cPaletteShift;
pScreenClutData[cColors].Green >>= ppdev->cPaletteShift;
pScreenClutData[cColors].Blue >>= ppdev->cPaletteShift;
pScreenClutData[cColors].Unused = 0;
}
}
else
{
while(cColors--)
{
pScreenClutData[cColors].Unused = 0;
}
}
// Set palette registers
if (!AtiDeviceIoControl(ppdev->hDriver,
IOCTL_VIDEO_SET_COLOR_REGISTERS,
pScreenClut,
MAX_CLUT_SIZE,
NULL,
0,
&cColors))
{
DISPDBG((0, "DrvSetPalette failed SET_COLOR_REGISTERS"));
return (FALSE);
}
return(TRUE);
}