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PALETTE.C
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PALETTE.C
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/******************************Module*Header*******************************\
* Module Name: palette.c
*
* Palette support.
*
* Copyright (c) 1992 Microsoft Corporation
\**************************************************************************/
#include "driver.h"
// Global Table defining the 20 Window Default Colors. For 256 color
// palettes the first 10 must be put at the beginning of the palette
// and the last 10 at the end of the palette.
const PALETTEENTRY BASEPALETTE[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
};
BOOL bInitDefaultPalette(PPDEV ppdev, DEVINFO *pDevInfo);
/******************************Public*Routine******************************\
* bInitPaletteInfo
*
* Initializes the palette information for this PDEV.
*
* Called by DrvEnablePDEV.
*
\**************************************************************************/
BOOL bInitPaletteInfo(PPDEV ppdev, DEVINFO *pDevInfo)
{
if (!bInitDefaultPalette(ppdev, pDevInfo))
return(FALSE);
return(TRUE);
}
/******************************Public*Routine******************************\
* vDisablePalette
*
* Frees resources allocated by bInitPaletteInfo.
*
\**************************************************************************/
VOID vDisablePalette(PPDEV ppdev)
{
// Delete the default palette if we created one.
if (ppdev->hpalDefault)
{
EngDeletePalette(ppdev->hpalDefault);
ppdev->hpalDefault = (HPALETTE) 0;
}
if (ppdev->pPal != (PPALETTEENTRY)NULL)
LocalFree((PVOID)ppdev->pPal);
}
/******************************Public*Routine******************************\
* bInitDefaultPalette
*
* Initializes default palette for PDEV.
*
\**************************************************************************/
BOOL bInitDefaultPalette(PPDEV ppdev, DEVINFO *pDevInfo)
{
if (ppdev->ulBitCount == 8)
{
ULONG ulLoop;
BYTE jRed,jGre,jBlu;
// Allocate our palette
ppdev->pPal = (PPALETTEENTRY)LocalAlloc(LMEM_FIXED | LMEM_ZEROINIT,
(sizeof(PALETTEENTRY) * 256));
if ((ppdev->pPal) == NULL) {
RIP("DISP bInitDefaultPalette() failed LocalAlloc\n");
return(FALSE);
}
// Generate 256 (8*4*4) RGB combinations to fill the palette
jRed = jGre = jBlu = 0;
for (ulLoop = 0; ulLoop < 256; ulLoop++)
{
ppdev->pPal[ulLoop].peRed = jRed;
ppdev->pPal[ulLoop].peGreen = jGre;
ppdev->pPal[ulLoop].peBlue = jBlu;
ppdev->pPal[ulLoop].peFlags = (BYTE)0;
if (!(jRed += 32))
if (!(jGre += 32))
jBlu += 64;
}
// Fill in Windows Reserved Colors from the WIN 3.0 DDK
// The Window Manager reserved the first and last 10 colors for
// painting windows borders and for non-palette managed applications.
for (ulLoop = 0; ulLoop < 10; ulLoop++)
{
// First 10
ppdev->pPal[ulLoop] = BASEPALETTE[ulLoop];
// Last 10
ppdev->pPal[246 + ulLoop] = BASEPALETTE[ulLoop+10];
}
// Create handle for palette.
ppdev->hpalDefault =
pDevInfo->hpalDefault = EngCreatePalette(PAL_INDEXED,
256,
(PULONG) ppdev->pPal,
0,0,0);
if (ppdev->hpalDefault == (HPALETTE) 0)
{
RIP("DISP bInitDefaultPalette failed EngCreatePalette\n");
LocalFree(ppdev->pPal);
return(FALSE);
}
// Initialize the hardware with the initial palette.
return(TRUE);
} else {
ppdev->hpalDefault =
pDevInfo->hpalDefault = EngCreatePalette(PAL_BITFIELDS,
0,(PULONG) NULL,
ppdev->flRed,
ppdev->flGreen,
ppdev->flBlue);
if (ppdev->hpalDefault == (HPALETTE) 0)
{
RIP("DISP bInitDefaultPalette failed EngCreatePalette\n");
return(FALSE);
}
}
return(TRUE);
}
/******************************Public*Routine******************************\
* bInit256ColorPalette
*
* Initialize the hardware's palette registers.
*
\**************************************************************************/
BOOL bInit256ColorPalette(PPDEV ppdev)
{
BYTE ajClutSpace[MAX_CLUT_SIZE];
PVIDEO_CLUT pScreenClut = (PVIDEO_CLUT) ajClutSpace;
ULONG ulReturnedDataLength;
// Fill in pScreenClut header info
pScreenClut->NumEntries = 256;
pScreenClut->FirstEntry = 0;
// make sure that we have a palette
if (ppdev->pPal == NULL)
{
RIP("DISP bInit256ColorPalette -- pPal == NULL\n");
return(FALSE);
}
// Copy Colors in.
RtlCopyMemory(pScreenClut->LookupTable, ppdev->pPal, sizeof(ULONG) * 256);
// Set palette registers
if (!DeviceIoControl(ppdev->hDriver,
IOCTL_VIDEO_SET_COLOR_REGISTERS,
pScreenClut,
MAX_CLUT_SIZE,
NULL,
0,
&ulReturnedDataLength,
NULL))
{
RIP("DISP bInit256ColorPalette failed DeviceIoControl\n");
return(FALSE);
}
return(TRUE);
}
/******************************Public*Routine******************************\
* DrvSetPalette
*
* DDI entry point for manipulating the palette.
*
\**************************************************************************/
BOOL DrvSetPalette(
IN DHPDEV dhpdev,
IN PALOBJ *ppalo,
IN FLONG fl,
IN ULONG iStart,
IN ULONG cColors)
{
BYTE ajClutSpace[MAX_CLUT_SIZE];
PVIDEO_CLUT pScreenClut = (PVIDEO_CLUT) ajClutSpace;
PPALETTEENTRY pape;
ULONG ulTemp = 256;
UNREFERENCED_PARAMETER(fl);
// Fill in pScreenClut header info
pScreenClut->NumEntries = cColors;
pScreenClut->FirstEntry = iStart;
pape = (PPALETTEENTRY) (pScreenClut->LookupTable);
if (cColors != PALOBJ_cGetColors(ppalo, iStart, cColors, (PULONG) pape))
{
RIP("DISP DrvSetPalette failed PALOBJ_cGetColors\n");
return(FALSE);
}
// Set the high reserved byte in each palette entry to 0.
while(cColors--)
pape[cColors].peFlags = 0;
// Set palette registers
if (!DeviceIoControl(((PPDEV)(dhpdev))->hDriver,
IOCTL_VIDEO_SET_COLOR_REGISTERS,
pScreenClut,
MAX_CLUT_SIZE,
NULL,
0,
&cColors,
NULL))
{
RIP("DISP DrvSetPalette failed DeviceIoControl\n");
return(FALSE);
}
return(TRUE);
}