Return to palette.c CVS log

Up to [WindowsNT SDKs] / ntddk / src / video / displays / xga

Microsoft Windows NT Build 511 (DDK SDK) 11-01-1993

/******************************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) {
            DISPDBG((0, "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)
        {
            DISPDBG((0, "DISP bInitDefaultPalette failed EngCreatePalette\n"));
            LocalFree(ppdev->pPal);
            return(FALSE);
        }

    // Initialize the hardware with the initial palette.

        return(TRUE);
    }
    else if (ppdev->ulBitCount == 16)
    {
        ppdev->hpalDefault =
        pDevInfo->hpalDefault = EngCreatePalette(PAL_BITFIELDS,
                                                 0,
                                                 (PULONG) NULL,
                                                 ppdev->flRed,
                                                 ppdev->flGreen,
                                                 ppdev->flBlue);

        if (ppdev->hpalDefault == (HPALETTE) 0)
        {
            DISPDBG((0, "DISP bInitDefaultPalette failed EngCreatePalette\n"));
            return(FALSE);
        }
    }
    else
    {
	RIP("XGA.DLL: bInitDefaultPalette-wrong BitCount\n");

    }

    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;


    // Copy Colors in.
    memcpy(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))
    {
        DISPDBG((0, "DISP bInit256ColorPalette failed DeviceIoControl\n"));
        return(FALSE);
    }

    return(TRUE);
}

/******************************Public*Routine******************************\
* 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_CLUT) ajClutSpace;
    PPALETTEENTRY pape;
    ULONG ulTemp = 256;

    UNREFERENCED_PARAMETER(fl);

// Fill in pScreenClut header info

    pScreenClut->NumEntries = (USHORT) cColors;
    pScreenClut->FirstEntry = (USHORT) iStart;

    pape = (PPALETTEENTRY) (pScreenClut->LookupTable);

    if (cColors != PALOBJ_cGetColors(ppalo, iStart, cColors, (PULONG) pape))
    {
        DISPDBG((0, "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))
    {
        DISPDBG((0, "DISP DrvSetPalette failed DeviceIoControl\n"));
        return(FALSE);
    }

    return(TRUE);
}

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.