xlateobj.c File Reference

#include <win32k.h>
#include <debug.h>

Include dependency graph for xlateobj.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
	_Post_satisfies_ (return==iColor)
	_Function_class_ (FN_XLATE)
VOID NTAPI	EXLATEOBJ_vInitialize (_Out_ PEXLATEOBJ pexlo, _In_opt_ PALETTE *ppalSrc, _In_opt_ PALETTE *ppalDst, _In_ COLORREF crSrcBackColor, _In_ COLORREF crDstBackColor, _In_ COLORREF crDstForeColor)
VOID NTAPI	EXLATEOBJ_vInitXlateFromDCs (_Out_ EXLATEOBJ *pexlo, _In_ PDC pdcSrc, _In_ PDC pdcDst)
VOID NTAPI	EXLATEOBJ_vInitSrcMonoXlate (PEXLATEOBJ pexlo, PPALETTE ppalDst, COLORREF crBackgroundClr, COLORREF crForegroundClr)
VOID NTAPI	EXLATEOBJ_vCleanup (_Inout_ PEXLATEOBJ pexlo)
ULONG NTAPI	XLATEOBJ_iXlate (_In_ XLATEOBJ *pxlo, _In_ ULONG iColor)
ULONG NTAPI	XLATEOBJ_cGetPalette (_In_ XLATEOBJ *pxlo, _In_ ULONG iPal, _In_ ULONG cPal, _Out_cap_(cPal) ULONG *pPalOut)
HANDLE NTAPI	XLATEOBJ_hGetColorTransform (_In_ XLATEOBJ *pxlo)
PULONG NTAPI	XLATEOBJ_piVector (_In_ XLATEOBJ *pxlo)

Variables
static ULONG	giUniqueXlate = 0
static const BYTE	gajXlate5to8 [32]
static const BYTE	gajXlate6to8 [64]

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 11 of file xlateobj.c.

Function Documentation

_Function_class_()

_Function_class_

(

FN_XLATE

)

Definition at line 52 of file xlateobj.c.

{
    return (iColor == pexlo->xlo.pulXlate[0]);
}

_Post_satisfies_()

_Post_satisfies_

(

return

= =iColor

)

Globals

iXlate functions

Definition at line 14 of file xlateobj.c.

                         {{0, XO_TRIVIAL, 0, 0, 0, 0}, EXLATEOBJ_iXlateTrivial};

EXLATEOBJ_vCleanup()

VOID NTAPI EXLATEOBJ_vCleanup

(

_Inout_ PEXLATEOBJ

pexlo

)

Definition at line 649 of file xlateobj.c.

{
    if (pexlo->xlo.pulXlate != pexlo->aulXlate)
    {
        EngFreeMem(pexlo->xlo.pulXlate);
    }
    pexlo->xlo.pulXlate = pexlo->aulXlate;
}

Referenced by DIB_16BPP_AlphaBlend(), DIB_XXBPP_AlphaBlend(), EBRUSHOBJ_bRealizeBrush(), EBRUSHOBJ_vSetSolidRGBColor(), EngSetPointerShape(), GreGetDIBitsInternal(), GreGradientFill(), GreSetPointerShape(), GreStretchBltMask(), IntExtTextOutW(), IntSetDIBits(), IntShowMousePointer(), NtGdiAlphaBlend(), NtGdiExtFloodFill(), NtGdiGetNearestColor(), NtGdiGetPixel(), NtGdiMaskBlt(), NtGdiSetDIBitsToDeviceInternal(), NtGdiSetPixel(), NtGdiStretchDIBitsInternal(), NtGdiTransparentBlt(), TranslateCOLORREF(), and UserDrawIconEx().

EXLATEOBJ_vInitialize()

VOID NTAPI EXLATEOBJ_vInitialize	(	_Out_ PEXLATEOBJ	pexlo,
		_In_opt_ PALETTE *	ppalSrc,
		_In_opt_ PALETTE *	ppalDst,
		_In_ COLORREF	crSrcBackColor,
		_In_ COLORREF	crDstBackColor,
		_In_ COLORREF	crDstForeColor
	)

Private Functions

Definition at line 358 of file xlateobj.c.

{
    ULONG cEntries;
    ULONG i, ulColor;
 
    if (!ppalSrc) ppalSrc = &gpalRGB;
    if (!ppalDst) ppalDst = &gpalRGB;
 
    pexlo->xlo.iUniq = InterlockedIncrement((LONG*)&giUniqueXlate);
    pexlo->xlo.cEntries = 0;
    pexlo->xlo.flXlate = 0;
    pexlo->xlo.pulXlate = pexlo->aulXlate;
    pexlo->pfnXlate = EXLATEOBJ_iXlateTrivial;
    pexlo->hColorTransform = NULL;
    pexlo->ppalSrc = ppalSrc;
    pexlo->ppalDst = ppalDst;
    pexlo->xlo.iSrcType = (USHORT)ppalSrc->flFlags;
    pexlo->xlo.iDstType = (USHORT)ppalDst->flFlags;
    pexlo->ppalDstDc = &gpalRGB;
 
    if (ppalDst == ppalSrc)
    {
        pexlo->xlo.flXlate |= XO_TRIVIAL;
        return;
    }
 
    /* Check if both of the palettes are indexed */
    if (!(ppalSrc->flFlags & PAL_INDEXED) || !(ppalDst->flFlags & PAL_INDEXED))
    {
        /* At least one palette is not indexed, calculate shifts/masks */
        ULONG aulMasksSrc[3], aulMasksDst[3];
 
        PALETTE_vGetBitMasks(ppalSrc, aulMasksSrc);
        PALETTE_vGetBitMasks(ppalDst, aulMasksDst);
 
        pexlo->ulRedMask = aulMasksDst[0];
        pexlo->ulGreenMask = aulMasksDst[1];
        pexlo->ulBlueMask = aulMasksDst[2];
 
        pexlo->ulRedShift = CalculateShift(aulMasksSrc[0], aulMasksDst[0]);
        pexlo->ulGreenShift = CalculateShift(aulMasksSrc[1], aulMasksDst[1]);
        pexlo->ulBlueShift = CalculateShift(aulMasksSrc[2], aulMasksDst[2]);
    }
 
    if (ppalSrc->flFlags & PAL_MONOCHROME)
    {
        /* This is a monochrome palette */
        if (!(ppalDst->flFlags & PAL_MONOCHROME))
        {
            /* Mono to color, use the dest DC's fore and back color */
            pexlo->pfnXlate = EXLATEOBJ_iXlateTable;
            pexlo->xlo.flXlate |= XO_TABLE;
            pexlo->xlo.cEntries = 2;
            pexlo->xlo.pulXlate[0] =
                PALETTE_ulGetNearestIndex(ppalDst, crDstForeColor);
            pexlo->xlo.pulXlate[1] =
                PALETTE_ulGetNearestIndex(ppalDst, crDstBackColor);
        }
    }
    else if (ppalDst->flFlags & PAL_MONOCHROME)
    {
        pexlo->pfnXlate = EXLATEOBJ_iXlateToMono;
        pexlo->xlo.flXlate |= XO_TO_MONO;
        pexlo->xlo.cEntries = 1;
 
        if (ppalSrc->flFlags & PAL_INDEXED)
        {
            pexlo->aulXlate[0] =
                PALETTE_ulGetNearestPaletteIndex(ppalSrc, crSrcBackColor);
        }
        else if (ppalSrc->flFlags & PAL_RGB)
        {
            pexlo->aulXlate[0] = crSrcBackColor;
        }
        else if (ppalSrc->flFlags & PAL_BGR)
        {
            pexlo->aulXlate[0] = RGB(GetBValue(crSrcBackColor),
                                     GetGValue(crSrcBackColor),
                                     GetRValue(crSrcBackColor));
        }
        else if (ppalSrc->flFlags & PAL_BITFIELDS)
        {
            PALETTE_vGetBitMasks(ppalSrc, &pexlo->ulRedMask);
            pexlo->ulRedShift = CalculateShift(RGB(0xFF,0,0), pexlo->ulRedMask);
            pexlo->ulGreenShift = CalculateShift(RGB(0,0xFF,0), pexlo->ulGreenMask);
            pexlo->ulBlueShift = CalculateShift(RGB(0,0,0xFF), pexlo->ulBlueMask);
 
            pexlo->aulXlate[0] = EXLATEOBJ_iXlateShiftAndMask(pexlo, crSrcBackColor);
        }
    }
    else if (ppalSrc->flFlags & PAL_INDEXED)
    {
        cEntries = ppalSrc->NumColors;
 
        /* Allocate buffer if needed */
        if (cEntries > 6)
        {
            pexlo->xlo.pulXlate = EngAllocMem(0,
                                              cEntries * sizeof(ULONG),
                                              GDITAG_PXLATE);
            if (!pexlo->xlo.pulXlate)
            {
                DPRINT1("Could not allocate pulXlate buffer.\n");
                pexlo->pfnXlate = EXLATEOBJ_iXlateTrivial;
                pexlo->xlo.flXlate = XO_TRIVIAL;
                return;
            }
        }
 
        pexlo->pfnXlate = EXLATEOBJ_iXlateTable;
        pexlo->xlo.cEntries = cEntries;
        pexlo->xlo.flXlate |= XO_TABLE;
 
        if (ppalDst->flFlags & PAL_INDEXED)
        {
            ULONG cDiff = 0;
 
            for (i = 0; i < cEntries; i++)
            {
                ulColor = RGB(ppalSrc->IndexedColors[i].peRed,
                              ppalSrc->IndexedColors[i].peGreen,
                              ppalSrc->IndexedColors[i].peBlue);
 
                pexlo->xlo.pulXlate[i] =
                    PALETTE_ulGetNearestPaletteIndex(ppalDst, ulColor);
 
                if (pexlo->xlo.pulXlate[i] != i) cDiff++;
            }
 
            /* Check if we have only trivial mappings */
            if (cDiff == 0)
            {
                if (pexlo->xlo.pulXlate != pexlo->aulXlate)
                {
                    EngFreeMem(pexlo->xlo.pulXlate);
                    pexlo->xlo.pulXlate = pexlo->aulXlate;
                }
                pexlo->pfnXlate = EXLATEOBJ_iXlateTrivial;
                pexlo->xlo.flXlate = XO_TRIVIAL;
                pexlo->xlo.cEntries = 0;
                return;
            }
        }
        else
        {
            for (i = 0; i < pexlo->xlo.cEntries; i++)
            {
                ulColor = RGB(ppalSrc->IndexedColors[i].peRed,
                              ppalSrc->IndexedColors[i].peGreen,
                              ppalSrc->IndexedColors[i].peBlue);
                pexlo->xlo.pulXlate[i] = PALETTE_ulGetNearestBitFieldsIndex(ppalDst, ulColor);
            }
        }
    }
    else if (ppalSrc->flFlags & PAL_RGB)
    {
        if (ppalDst->flFlags & PAL_INDEXED)
            pexlo->pfnXlate = EXLATEOBJ_iXlateRGBtoPal;
 
        else if (ppalDst->flFlags & PAL_BGR)
            pexlo->pfnXlate = EXLATEOBJ_iXlateRGBtoBGR;
 
        else if (ppalDst->flFlags & PAL_RGB16_555)
            pexlo->pfnXlate = EXLATEOBJ_iXlateRGBto555;
 
        else if (ppalDst->flFlags & PAL_RGB16_565)
            pexlo->pfnXlate = EXLATEOBJ_iXlateRGBto565;
 
        else if (ppalDst->flFlags & PAL_BITFIELDS)
            pexlo->pfnXlate = EXLATEOBJ_iXlateShiftAndMask;
    }
    else if (ppalSrc->flFlags & PAL_BGR)
    {
        if (ppalDst->flFlags & PAL_INDEXED)
            pexlo->pfnXlate = EXLATEOBJ_iXlateBitfieldsToPal;
 
        else if (ppalDst->flFlags & PAL_RGB)
            /* The inverse function works the same */
            pexlo->pfnXlate = EXLATEOBJ_iXlateRGBtoBGR;
 
        else if (ppalDst->flFlags & PAL_RGB16_555)
            pexlo->pfnXlate = EXLATEOBJ_iXlateBGRto555;
 
        else if (ppalDst->flFlags & PAL_RGB16_565)
            pexlo->pfnXlate = EXLATEOBJ_iXlateBGRto565;
 
        else if (ppalDst->flFlags & PAL_BITFIELDS)
            pexlo->pfnXlate = EXLATEOBJ_iXlateShiftAndMask;
    }
    else if (ppalSrc->flFlags & PAL_RGB16_555)
    {
        if (ppalDst->flFlags & PAL_INDEXED)
            pexlo->pfnXlate = EXLATEOBJ_iXlate555toPal;
 
        else if (ppalDst->flFlags & PAL_RGB)
            pexlo->pfnXlate = EXLATEOBJ_iXlate555toRGB;
 
        else if (ppalDst->flFlags & PAL_BGR)
            pexlo->pfnXlate = EXLATEOBJ_iXlate555toBGR;
 
        else if (ppalDst->flFlags & PAL_RGB16_565)
            pexlo->pfnXlate = EXLATEOBJ_iXlate555to565;
 
        else if (ppalDst->flFlags & PAL_BITFIELDS)
            pexlo->pfnXlate = EXLATEOBJ_iXlateShiftAndMask;
    }
    else if (ppalSrc->flFlags & PAL_RGB16_565)
    {
        if (ppalDst->flFlags & PAL_INDEXED)
            pexlo->pfnXlate = EXLATEOBJ_iXlate565toPal;
 
        else if (ppalDst->flFlags & PAL_RGB)
            pexlo->pfnXlate = EXLATEOBJ_iXlate565toRGB;
 
        else if (ppalDst->flFlags & PAL_BGR)
            pexlo->pfnXlate = EXLATEOBJ_iXlate565toBGR;
 
        else if (ppalDst->flFlags & PAL_RGB16_555)
            pexlo->pfnXlate = EXLATEOBJ_iXlate565to555;
 
        else if (ppalDst->flFlags & PAL_BITFIELDS)
            pexlo->pfnXlate = EXLATEOBJ_iXlateShiftAndMask;
    }
    else if (ppalSrc->flFlags & PAL_BITFIELDS)
    {
        if (ppalDst->flFlags & PAL_INDEXED)
            pexlo->pfnXlate = EXLATEOBJ_iXlateBitfieldsToPal;
        else
            pexlo->pfnXlate = EXLATEOBJ_iXlateShiftAndMask;
    }
 
    /* Check for a trivial shift and mask operation */
    if (pexlo->pfnXlate == EXLATEOBJ_iXlateShiftAndMask &&
        !pexlo->ulRedShift && !pexlo->ulGreenShift && !pexlo->ulBlueShift)
    {
            pexlo->pfnXlate = EXLATEOBJ_iXlateTrivial;
    }
 
    /* Check for trivial xlate */
    if (pexlo->pfnXlate == EXLATEOBJ_iXlateTrivial)
        pexlo->xlo.flXlate = XO_TRIVIAL;
    else
        pexlo->xlo.flXlate &= ~XO_TRIVIAL;
}

Referenced by DIB_16BPP_AlphaBlend(), DIB_XXBPP_AlphaBlend(), EBRUSHOBJ_bRealizeBrush(), EBRUSHOBJ_vSetSolidRGBColor(), EngSetPointerShape(), EXLATEOBJ_vInitSrcMonoXlate(), EXLATEOBJ_vInitXlateFromDCs(), GreGetDIBitsInternal(), GreGradientFill(), GreSetPointerShape(), IntExtTextOutW(), IntSetDIBits(), IntShowMousePointer(), NtGdiExtFloodFill(), NtGdiGetNearestColor(), NtGdiGetPixel(), NtGdiSetDIBitsToDeviceInternal(), NtGdiSetPixel(), NtGdiStretchDIBitsInternal(), NtGdiTransparentBlt(), TranslateCOLORREF(), and UserDrawIconEx().

EXLATEOBJ_vInitSrcMonoXlate()

VOID NTAPI EXLATEOBJ_vInitSrcMonoXlate	(	PEXLATEOBJ	pexlo,
		PPALETTE	ppalDst,
		COLORREF	crBackgroundClr,
		COLORREF	crForegroundClr
	)

Definition at line 632 of file xlateobj.c.

{
    /* Normal initialisation, with mono palette as source */
    EXLATEOBJ_vInitialize(pexlo,
                          gppalMono,
                          ppalDst,
                          0,
                          crBackgroundClr,
                          crForegroundClr);
}

Referenced by UserDrawIconEx().

EXLATEOBJ_vInitXlateFromDCs()

VOID NTAPI EXLATEOBJ_vInitXlateFromDCs	(	_Out_ EXLATEOBJ *	pexlo,
		_In_ PDC	pdcSrc,
		_In_ PDC	pdcDst
	)

Definition at line 611 of file xlateobj.c.

{
    PSURFACE psurfDst, psurfSrc;
 
    psurfDst = pdcDst->dclevel.pSurface;
    psurfSrc = pdcSrc->dclevel.pSurface;
 
    /* Normal initialisation. No surface means DEFAULT_BITMAP */
    EXLATEOBJ_vInitialize(pexlo,
                          psurfSrc ? psurfSrc->ppal : gppalMono,
                          psurfDst ? psurfDst->ppal : gppalMono,
                          pdcSrc->pdcattr->crBackgroundClr,
                          pdcDst->pdcattr->crBackgroundClr,
                          pdcDst->pdcattr->crForegroundClr);
 
    pexlo->ppalDstDc = pdcDst->dclevel.ppal;
}

Referenced by GreStretchBltMask(), NtGdiAlphaBlend(), NtGdiMaskBlt(), and NtGdiTransparentBlt().

XLATEOBJ_cGetPalette()

ULONG NTAPI XLATEOBJ_cGetPalette	(	_In_ XLATEOBJ *	pxlo,
		_In_ ULONG	iPal,
		_In_ ULONG	cPal,
		_Out_cap_(cPal) ULONG *	pPalOut
	)

Definition at line 679 of file xlateobj.c.

{
    PEXLATEOBJ pexlo = (PEXLATEOBJ)pxlo;
    PPALETTE ppal;
    ULONG i;
 
    if (!pxlo)
    {
        return 0;
    }
 
    if (iPal > 5)
    {
       DPRINT1("XLATEOBJ_cGetPalette called with wrong iPal: %lu\n", iPal);
       return 0;
    }
 
    /* Get the requested palette */
    if (iPal == XO_DESTDCPALETTE)
    {
        ppal = pexlo->ppalDstDc;
    }
    else if (iPal == XO_SRCPALETTE || iPal == XO_SRCBITFIELDS)
    {
        ppal = pexlo->ppalSrc;
    }
    else
    {
        ppal = pexlo->ppalDst;
    }
 
    /* Verify palette type match */
    if (!ppal ||
        ((iPal == XO_SRCPALETTE || iPal == XO_DESTPALETTE)
            && !(ppal->flFlags & PAL_INDEXED)) ||
        ((iPal == XO_SRCBITFIELDS || iPal == XO_DESTBITFIELDS)
            && !(ppal->flFlags & PAL_BITFIELDS)))
    {
        return 0;
    }
 
    if(!pPalOut)
    {
        return ppal->NumColors;
    }
 
    /* Copy the values into the buffer */
    if (ppal->flFlags & PAL_INDEXED)
    {
        cPal = min(cPal, ppal->NumColors);
        for (i = 0; i < cPal; i++)
        {
            pPalOut[i] = RGB(ppal->IndexedColors[i].peRed,
                             ppal->IndexedColors[i].peGreen,
                             ppal->IndexedColors[i].peBlue);
        }
    }
    else
    {
        // FIXME: should use the above code
        pPalOut[0] = ppal->RedMask;
        pPalOut[1] = ppal->GreenMask;
        pPalOut[2] = ppal->BlueMask;
    }
 
    return cPal;
}

XLATEOBJ_hGetColorTransform()

HANDLE NTAPI XLATEOBJ_hGetColorTransform

(

_In_ XLATEOBJ *

pxlo

)

Definition at line 753 of file xlateobj.c.

{
    PEXLATEOBJ pexlo = (PEXLATEOBJ)pxlo;
    return pexlo->hColorTransform;
}

XLATEOBJ_iXlate()

ULONG NTAPI XLATEOBJ_iXlate	(	_In_ XLATEOBJ *	pxlo,
		_In_ ULONG	iColor
	)

Public DDI Functions

Definition at line 664 of file xlateobj.c.

{
    PEXLATEOBJ pexlo = (PEXLATEOBJ)pxlo;
 
    if (!pxlo)
        return iColor;
 
    /* Call the iXlate function */
    return pexlo->pfnXlate(pexlo, iColor);
}

Referenced by AlphaBltMask(), BltMask(), DIB_16BPP_BitBltSrcCopy(), DIB_16BPP_TransparentBlt(), DIB_1BPP_BitBltSrcCopy(), DIB_1BPP_BitBltSrcCopy_From1BPP(), DIB_24BPP_BitBltSrcCopy(), DIB_24BPP_TransparentBlt(), DIB_32BPP_BitBltSrcCopy(), DIB_32BPP_TransparentBlt(), DIB_4BPP_BitBltSrcCopy(), DIB_8BPP_BitBltSrcCopy(), DIB_8BPP_TransparentBlt(), Dib_BitBlt_BLACKNESS(), Dib_BitBlt_WHITENESS(), DIB_BltToVGAWithXlate(), DIB_XXBPP_AlphaBlend(), DIB_XXBPP_StretchBlt(), EBRUSHOBJ_vSetSolidRGBColor(), IntEngGradientFillRect(), IntEngGradientFillTriangle(), NtGdiExtFloodFill(), NtGdiGetNearestColor(), NtGdiSetPixel(), NtGdiTransparentBlt(), TranslateCOLORREF(), and VGAtoDIB().

XLATEOBJ_piVector()

PULONG NTAPI XLATEOBJ_piVector

(

_In_ XLATEOBJ *

pxlo

)

Definition at line 762 of file xlateobj.c.

{
    if (pxlo->iSrcType == PAL_INDEXED)
    {
        return pxlo->pulXlate;
    }
 
    return NULL;
}

Variable Documentation

gajXlate5to8

const BYTE gajXlate5to8[32]

static

Initial value:

=
{  0,  8, 16, 25, 33, 41, 49, 58, 66, 74, 82, 90, 99,107,115,123,
 132,140,148,156,165,173,181,189,197,206,214,222,231,239,247,255}

Definition at line 28 of file xlateobj.c.

gajXlate6to8

const BYTE gajXlate6to8[64]

static

Initial value:

=
{ 0,  4,  8, 12, 16, 20, 24, 28, 32, 36, 40, 45, 49, 52, 57, 61,
 65, 69, 73, 77, 81, 85, 89, 93, 97,101,105,109,113,117,121,125,
130,134,138,142,146,150,154,158,162,166,170,174,178,182,186,190,
194,198,202,207,210,215,219,223,227,231,235,239,243,247,251,255}

Definition at line 32 of file xlateobj.c.

giUniqueXlate

ULONG giUniqueXlate = 0

static

Definition at line 26 of file xlateobj.c.

Referenced by EXLATEOBJ_vInitialize().