clip.c File Reference

#include <win32k.h>

Include dependency graph for clip.c:

Go to the source code of this file.

Functions
	DBG_DEFAULT_CHANNEL (EngClip)
static __inline int	CompareRightDown (const RECTL *r1, const RECTL *r2)
static __inline int	CompareRightUp (const RECTL *r1, const RECTL *r2)
static __inline int	CompareLeftDown (const RECTL *r1, const RECTL *r2)
static __inline int	CompareLeftUp (const RECTL *r1, const RECTL *r2)
VOID FASTCALL	IntEngInitClipObj (XCLIPOBJ *Clip)
VOID FASTCALL	IntEngFreeClipResources (XCLIPOBJ *Clip)
VOID FASTCALL	IntEngUpdateClipRegion (XCLIPOBJ *Clip, ULONG count, const RECTL *pRect, const RECTL *rcBounds)
CLIPOBJ *APIENTRY	EngCreateClip (VOID)
VOID APIENTRY	EngDeleteClip (_In_ _Post_ptr_invalid_ CLIPOBJ *pco)
ULONG APIENTRY	CLIPOBJ_cEnumStart (_Inout_ CLIPOBJ *pco, _In_ BOOL bAll, _In_ ULONG iType, _In_ ULONG iDirection, _In_ ULONG cMaxRects)
BOOL APIENTRY	CLIPOBJ_bEnum (_In_ CLIPOBJ *pco, _In_ ULONG cj, _Out_bytecap_(cj) ULONG *pulEnumRects)

Function Documentation

CLIPOBJ_bEnum()

BOOL APIENTRY CLIPOBJ_bEnum	(	_In_ CLIPOBJ *	pco,
		_In_ ULONG	cj,
		_Out_bytecap_(cj) ULONG *	pulEnumRects
	)

Definition at line 319 of file clip.c.

{
    const RECTL* src;
    XCLIPOBJ* Clip = (XCLIPOBJ *)pco;
    ULONG nCopy;
    ENUMRECTS* pERects = (ENUMRECTS*)pulEnumRects;
 
    // Calculate how many rectangles we should copy
    nCopy = min( Clip->EnumMax - Clip->EnumPos,
            min( Clip->RectCount - Clip->EnumPos,
            (cj - sizeof(ULONG)) / sizeof(RECTL)));
 
    if(nCopy == 0)
    {
        return FALSE;
    }
 
    /* Copy rectangles */
    src = &Clip->Rects[Clip->EnumPos];
    RtlCopyMemory(pERects->arcl, src, nCopy * sizeof(RECTL));
 
    pERects->c = nCopy;
 
    Clip->EnumPos+=nCopy;
 
    return Clip->EnumPos < Clip->RectCount;
}

Referenced by DrvBitBlt(), DrvLineTo(), EngAlphaBlend(), EngBitBlt(), EngCopyBits(), EngLineTo(), EngMaskBitBlt(), EngStretchBltROP(), EngTransparentBlt(), IntEngGradientFillRect(), IntEngGradientFillTriangle(), NEtoSW(), NWtoSE(), SEtoNW(), SWtoNE(), VGADDIPaintRgn(), vgaNEtoSW(), vgaNWtoSE(), vgaSEtoNW(), vgaSWtoNE(), and WNDOBJ_bEnum().

CLIPOBJ_cEnumStart()

ULONG APIENTRY CLIPOBJ_cEnumStart	(	_Inout_ CLIPOBJ *	pco,
		_In_ BOOL	bAll,
		_In_ ULONG	iType,
		_In_ ULONG	iDirection,
		_In_ ULONG	cMaxRects
	)

Definition at line 255 of file clip.c.

{
    XCLIPOBJ* Clip = (XCLIPOBJ *)pco;
    SORTCOMP CompareFunc;
 
    Clip->bAll    = bAll;
    Clip->iType   = iType;
    Clip->EnumPos = 0;
    Clip->EnumMax = (cMaxRects > 0) ? cMaxRects : Clip->RectCount;
 
    if (CD_ANY != iDirection && Clip->iDirection != iDirection)
    {
        switch (iDirection)
        {
            case CD_RIGHTDOWN:
                CompareFunc = (SORTCOMP) CompareRightDown;
                break;
 
            case CD_RIGHTUP:
                CompareFunc = (SORTCOMP) CompareRightUp;
                break;
 
            case CD_LEFTDOWN:
                CompareFunc = (SORTCOMP) CompareLeftDown;
                break;
 
            case CD_LEFTUP:
                CompareFunc = (SORTCOMP) CompareLeftUp;
                break;
 
            default:
                ERR("Invalid iDirection %lu\n", iDirection);
                iDirection = Clip->iDirection;
                CompareFunc = NULL;
                break;
        }
 
        if (NULL != CompareFunc)
        {
            EngSort((PBYTE) Clip->Rects, sizeof(RECTL), Clip->RectCount, CompareFunc);
        }
 
        Clip->iDirection = iDirection;
    }
 
    /* Return the number of rectangles enumerated */
    if ((cMaxRects > 0) && (Clip->RectCount > cMaxRects))
    {
        return 0xFFFFFFFF;
    }
 
    return Clip->RectCount;
}

Referenced by DrvBitBlt(), DrvLineTo(), EngAlphaBlend(), EngBitBlt(), EngCopyBits(), EngLineTo(), EngMaskBitBlt(), EngStretchBltROP(), EngTransparentBlt(), IntEngGradientFillRect(), IntEngGradientFillTriangle(), NEtoSW(), NWtoSE(), SEtoNW(), SWtoNE(), VGADDIPaintRgn(), vgaNEtoSW(), vgaNWtoSE(), vgaSEtoNW(), vgaSWtoNE(), and WNDOBJ_cEnumStart().

CompareLeftDown()

static __inline int CompareLeftDown ( const RECTL *  r1, const RECTL *  r2  )

static

Definition at line 86 of file clip.c.

{
    int Cmp;
 
    if (r1->top < r2->top)
    {
        Cmp = -1;
    }
    else if (r2->top < r1->top)
    {
        Cmp = +1;
    }
    else
    {
        ASSERT(r1->bottom == r2->bottom);
        if (r1->right < r2->right)
        {
            Cmp = +1;
        }
        else if (r2->right < r1->right)
        {
            Cmp = -1;
        }
        else
        {
            ASSERT(r1->left == r2->left);
            Cmp = 0;
        }
    }
 
    return Cmp;
}

Referenced by CLIPOBJ_cEnumStart().

CompareLeftUp()

static __inline int CompareLeftUp ( const RECTL *  r1, const RECTL *  r2  )

static

Definition at line 122 of file clip.c.

{
    int Cmp;
 
    if (r1->bottom < r2->bottom)
    {
        Cmp = +1;
    }
    else if (r2->bottom < r1->bottom)
    {
        Cmp = -1;
    }
    else
    {
        ASSERT(r1->top == r2->top);
        if (r1->right < r2->right)
        {
            Cmp = +1;
        }
        else if (r2->right < r1->right)
        {
            Cmp = -1;
        }
        else
        {
            ASSERT(r1->left == r2->left);
            Cmp = 0;
        }
    }
    return Cmp;
}

Referenced by CLIPOBJ_cEnumStart().

CompareRightDown()

static __inline int CompareRightDown ( const RECTL *  r1, const RECTL *  r2  )

static

Definition at line 14 of file clip.c.

{
    int Cmp;
 
    if (r1->top < r2->top)
    {
        Cmp = -1;
    }
    else if (r2->top < r1->top)
    {
        Cmp = +1;
    }
    else
    {
        ASSERT(r1->bottom == r2->bottom);
        if (r1->left < r2->left)
        {
            Cmp = -1;
        }
        else if (r2->left < r1->left)
        {
            Cmp = +1;
        }
        else
        {
            ASSERT(r1->right == r2->right);
            Cmp = 0;
        }
    }
 
    return Cmp;
}

Referenced by CLIPOBJ_cEnumStart().

CompareRightUp()

static __inline int CompareRightUp ( const RECTL *  r1, const RECTL *  r2  )

static

Definition at line 50 of file clip.c.

{
    int Cmp;
 
    if (r1->bottom < r2->bottom)
    {
        Cmp = +1;
    }
    else if (r2->bottom < r1->bottom)
    {
        Cmp = -1;
    }
    else
    {
        ASSERT(r1->top == r2->top);
        if (r1->left < r2->left)
        {
            Cmp = -1;
        }
        else if (r2->left < r1->left)
        {
            Cmp = +1;
        }
        else
        {
            ASSERT(r1->right == r2->right);
            Cmp = 0;
        }
    }
 
    return Cmp;
}

Referenced by CLIPOBJ_cEnumStart().

DBG_DEFAULT_CHANNEL()

DBG_DEFAULT_CHANNEL

(

EngClip

)

EngCreateClip()

CLIPOBJ *APIENTRY EngCreateClip

(

VOID

)

Definition at line 222 of file clip.c.

{
    XCLIPOBJ *Clip = EngAllocMem(FL_ZERO_MEMORY, sizeof(XCLIPOBJ), GDITAG_CLIPOBJ);
    if(Clip != NULL)
    {
        IntEngInitClipObj(Clip);
        TRACE("Created Clip Obj %p.\n", Clip);
        return (CLIPOBJ *)Clip;
    }
 
    ERR("Clip object allocation failed!\n");
    return NULL;
}

Referenced by EngLineTo(), and IntEngEnter().

EngDeleteClip()

VOID APIENTRY EngDeleteClip

(

_In_ _Post_ptr_invalid_ CLIPOBJ *

pco

)

Definition at line 241 of file clip.c.

{
    XCLIPOBJ* pxco = (XCLIPOBJ *)pco;
    TRACE("Deleting %p.\n", pco);
    IntEngFreeClipResources(pxco);
    EngFreeMem(pxco);
}

Referenced by EngLineTo(), IntEngEnter(), and IntEngLeave().

IntEngFreeClipResources()

VOID FASTCALL IntEngFreeClipResources

(

XCLIPOBJ *

Clip

)

Definition at line 164 of file clip.c.

{
    if (Clip->Rects != &Clip->rclBounds)
        EngFreeMem(Clip->Rects);
}

Referenced by DC_vCleanup(), EngDeleteClip(), EngDeleteWnd(), IntGdiBitBltRgn(), and IntGdiFillRgn().

IntEngInitClipObj()

VOID FASTCALL IntEngInitClipObj

(

XCLIPOBJ *

Clip

)

Definition at line 158 of file clip.c.

{
    Clip->Rects = &Clip->rclBounds;
}

Referenced by DC_vInitDc(), EngCreateClip(), EngCreateWnd(), IntGdiBitBltRgn(), and IntGdiFillRgn().

IntEngUpdateClipRegion()

VOID FASTCALL IntEngUpdateClipRegion	(	XCLIPOBJ *	Clip,
		ULONG	count,
		const RECTL *	pRect,
		const RECTL *	rcBounds
	)

Definition at line 173 of file clip.c.

{
    if(count > 1)
    {
        RECTL* NewRects = EngAllocMem(0, FIELD_OFFSET(ENUMRECTS, arcl[count]), GDITAG_CLIPOBJ);
 
        if(NewRects != NULL)
        {
            Clip->RectCount = count;
            Clip->iDirection = CD_ANY;
            RtlCopyMemory(NewRects, pRect, count * sizeof(RECTL));
 
            Clip->iDComplexity = DC_COMPLEX;
            Clip->iFComplexity = ((Clip->RectCount <= 4) ? FC_RECT4 : FC_COMPLEX);
            Clip->iMode = TC_RECTANGLES;
            Clip->rclBounds = *rcBounds;
 
            if (Clip->Rects != &Clip->rclBounds)
                EngFreeMem(Clip->Rects);
            Clip->Rects = NewRects;
        }
    }
    else
    {
        Clip->iDirection = CD_ANY;
 
        Clip->iDComplexity = (((rcBounds->top == rcBounds->bottom) &&
                                     (rcBounds->left == rcBounds->right))
                                     ? DC_TRIVIAL : DC_RECT);
 
        Clip->iFComplexity = FC_RECT;
        Clip->iMode = TC_RECTANGLES;
        Clip->rclBounds = *rcBounds;
        Clip->RectCount = 1;
        if (Clip->Rects != &Clip->rclBounds)
            EngFreeMem(Clip->Rects);
        Clip->Rects = &Clip->rclBounds;
    }
}

Referenced by CLIPPING_UpdateGCRegion(), EngLineTo(), IntEngWndUpdateClipObj(), IntGdiBitBltRgn(), and IntGdiFillRgn().