xaaOverlayDF.c   [plain text]

/*
   Copyright (c) 1999 - The XFree86 Project Inc.

   Written by Mark Vojkovich
*/


#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include "misc.h"
#include "xf86.h"
#include "xf86_OSproc.h"

#include <X11/X.h>
#include "scrnintstr.h"
#include "pixmapstr.h"
#include "windowstr.h"
#include "xf86str.h"
#include "mi.h"
#include "miline.h"
#include "xaa.h"
#include "xaalocal.h"
#include "xaawrap.h"
#include "servermd.h"

/* Screen funcs */

static void XAAOverCopyWindow(WindowPtr, DDXPointRec, RegionPtr);
static void XAAOverWindowExposures(WindowPtr, RegionPtr, RegionPtr);

static int XAAOverStippledFillChooser(GCPtr);
static int XAAOverOpaqueStippledFillChooser(GCPtr);
static int XAAOverTiledFillChooser(GCPtr);

/* GC funcs */

static RegionPtr XAAOverCopyArea(DrawablePtr, DrawablePtr, GC *,
			int, int, int, int, int, int);
static RegionPtr XAAOverCopyPlane(DrawablePtr, DrawablePtr, GCPtr,
			int, int, int, int, int, int, unsigned long);
static void XAAOverPushPixelsSolid(GCPtr, PixmapPtr, DrawablePtr, int, 
			int, int, int);
static void XAAOverPolyFillRectSolid(DrawablePtr, GCPtr, int, xRectangle*);
static void XAAOverPolyFillRectStippled(DrawablePtr, GCPtr, int, xRectangle*);
static void XAAOverPolyFillRectOpaqueStippled(DrawablePtr, GCPtr, 
			int, xRectangle*);
static void XAAOverPolyFillRectTiled(DrawablePtr, GCPtr, int, xRectangle*);
static void XAAOverFillSpansSolid(DrawablePtr, GCPtr, int, DDXPointPtr, 
			int*, int);
static void XAAOverFillSpansStippled(DrawablePtr, GCPtr, int, DDXPointPtr, 
			int*, int);
static void XAAOverFillSpansOpaqueStippled(DrawablePtr, GCPtr, int, 
			DDXPointPtr, int*, int);
static void XAAOverFillSpansTiled(DrawablePtr, GCPtr, int, DDXPointPtr, 
			int*, int);
static int XAAOverPolyText8TE(DrawablePtr, GCPtr, int, int, int, char *);
static int XAAOverPolyText16TE(DrawablePtr, GCPtr, int, int, int, 
			unsigned short*);
static void XAAOverImageText8TE(DrawablePtr, GCPtr, int, int, int, char*);
static void XAAOverImageText16TE(DrawablePtr, GCPtr, int, int, int, 
			unsigned short*);
static void XAAOverImageGlyphBltTE(DrawablePtr, GCPtr, int, int, 
			unsigned int, CharInfoPtr*, pointer);
static void XAAOverPolyGlyphBltTE(DrawablePtr, GCPtr, int, int, 
			unsigned int, CharInfoPtr*, pointer);
static int XAAOverPolyText8NonTE(DrawablePtr, GCPtr, int, int, int, char*);
static int XAAOverPolyText16NonTE(DrawablePtr, GCPtr, int, int, int, 
			unsigned short*);
static void XAAOverImageText8NonTE(DrawablePtr, GCPtr, int, int, int, char*);
static void XAAOverImageText16NonTE(DrawablePtr, GCPtr, int, int, int, 
			unsigned short*);
static void XAAOverImageGlyphBltNonTE(DrawablePtr, GCPtr, int, int, 
			unsigned int, CharInfoPtr *, pointer);
static void XAAOverPolyGlyphBltNonTE(DrawablePtr, GCPtr, int, int, 
			unsigned int, CharInfoPtr *, pointer);
static void XAAOverPolyRectangleThinSolid(DrawablePtr, GCPtr, int, xRectangle*);
static void XAAOverPolylinesWideSolid(DrawablePtr, GCPtr, int, int, 
			DDXPointPtr);
static void XAAOverPolylinesThinSolid(DrawablePtr, GCPtr, int, int, 
			DDXPointPtr);
static void XAAOverPolySegmentThinSolid(DrawablePtr, GCPtr, int, xSegment*);
static void XAAOverPolylinesThinDashed(DrawablePtr, GCPtr, int, int, 
			DDXPointPtr);
static void XAAOverPolySegmentThinDashed(DrawablePtr, GCPtr, int, xSegment*);
static void XAAOverFillPolygonSolid(DrawablePtr, GCPtr, int, int, int, 
			DDXPointPtr);
static void XAAOverFillPolygonStippled(DrawablePtr, GCPtr, int, int, int,
			DDXPointPtr);
static void XAAOverFillPolygonOpaqueStippled(DrawablePtr, GCPtr, int, int, int, 
			DDXPointPtr);
static void XAAOverFillPolygonTiled(DrawablePtr, GCPtr, int, int, int, 
			DDXPointPtr);
static void XAAOverPolyFillArcSolid(DrawablePtr, GCPtr, int, xArc*);
static void XAAOverPutImage(DrawablePtr, GCPtr, int, int, int, int, int, 
			int, int, char*);


typedef struct {
   ScrnInfoPtr		pScrn;
   DepthChangeFuncPtr	callback;
   int			currentDepth;
/* GC funcs */
   RegionPtr (*CopyArea)(DrawablePtr, DrawablePtr, GC *,
			int, int, int, int, int, int);
   RegionPtr (*CopyPlane)(DrawablePtr, DrawablePtr, GCPtr,
			int, int, int, int, int, int, unsigned long);
   void (*PushPixelsSolid)(GCPtr, PixmapPtr, DrawablePtr, int, int, int, int);
   void (*PolyFillRectSolid)(DrawablePtr, GCPtr, int, xRectangle*);
   void (*PolyFillRectStippled)(DrawablePtr, GCPtr, int, xRectangle*);
   void (*PolyFillRectOpaqueStippled)(DrawablePtr, GCPtr, int, xRectangle*);
   void (*PolyFillRectTiled)(DrawablePtr, GCPtr, int, xRectangle*);
   void (*FillSpansSolid)(DrawablePtr, GCPtr, int, DDXPointPtr, int*, int);
   void (*FillSpansStippled)(DrawablePtr, GCPtr, int, DDXPointPtr, int*, int);
   void (*FillSpansOpaqueStippled)(DrawablePtr,GCPtr,int,DDXPointPtr,int*,int);
   void (*FillSpansTiled)(DrawablePtr, GCPtr, int, DDXPointPtr, int*, int);
   int (*PolyText8TE)(DrawablePtr, GCPtr, int, int, int, char *);
   int (*PolyText16TE)(DrawablePtr, GCPtr, int, int, int, unsigned short*);
   void (*ImageText8TE)(DrawablePtr, GCPtr, int, int, int, char*);
   void (*ImageText16TE)(DrawablePtr, GCPtr, int, int, int, unsigned short*);
   void (*ImageGlyphBltTE)(DrawablePtr, GCPtr, int, int, unsigned int,
			CharInfoPtr*, pointer);
   void (*PolyGlyphBltTE)(DrawablePtr, GCPtr, int, int, unsigned int,
			CharInfoPtr*, pointer);
   int (*PolyText8NonTE)(DrawablePtr, GCPtr, int, int, int, char*);
   int (*PolyText16NonTE)(DrawablePtr, GCPtr, int, int, int, unsigned short*);
   void (*ImageText8NonTE)(DrawablePtr, GCPtr, int, int, int, char*);
   void (*ImageText16NonTE)(DrawablePtr, GCPtr, int, int, int, unsigned short*);
   void (*ImageGlyphBltNonTE)(DrawablePtr, GCPtr, int, int, unsigned int,
			CharInfoPtr *, pointer);
   void (*PolyGlyphBltNonTE)(DrawablePtr, GCPtr, int, int, unsigned int,
			CharInfoPtr *, pointer);
   void (*PolyRectangleThinSolid)(DrawablePtr, GCPtr, int, xRectangle*);
   void (*PolylinesWideSolid)(DrawablePtr, GCPtr, int, int, DDXPointPtr);

   void (*PolylinesThinSolid)(DrawablePtr, GCPtr, int, int, DDXPointPtr);
   void (*PolySegmentThinSolid)(DrawablePtr, GCPtr, int, xSegment*);
   void (*PolylinesThinDashed)(DrawablePtr, GCPtr, int, int, DDXPointPtr);
   void (*PolySegmentThinDashed)(DrawablePtr, GCPtr, int, xSegment*);
   void (*FillPolygonSolid)(DrawablePtr, GCPtr, int, int, int, DDXPointPtr);
   void (*FillPolygonStippled)(DrawablePtr, GCPtr, int, int, int, DDXPointPtr);
   void (*FillPolygonOpaqueStippled)(DrawablePtr, GCPtr, int, int, int, 
			DDXPointPtr);
   void (*FillPolygonTiled)(DrawablePtr, GCPtr, int, int, int, DDXPointPtr);
   void (*PolyFillArcSolid)(DrawablePtr, GCPtr, int, xArc*);
   void (*PutImage)(DrawablePtr, GCPtr, int, int, int, int, int, int, 
			int, char*);
   int (*StippledFillChooser)(GCPtr);
   int (*OpaqueStippledFillChooser)(GCPtr);
   int (*TiledFillChooser)(GCPtr);
} XAAOverlayRec, *XAAOverlayPtr;

static int XAAOverlayKeyIndex;
static DevPrivateKey XAAOverlayKey = &XAAOverlayKeyIndex;

#define GET_OVERLAY_PRIV(pScreen) \
    (XAAOverlayPtr)dixLookupPrivate(&(pScreen)->devPrivates, XAAOverlayKey)

#define SWITCH_DEPTH(d) \
   if(pOverPriv->currentDepth != d) { \
	(*pOverPriv->callback)(pOverPriv->pScrn, d); \
	pOverPriv->currentDepth = d; \
   }


Bool
XAAInitDualFramebufferOverlay(
    ScreenPtr pScreen, 
    DepthChangeFuncPtr callback
){
    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
    XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCREEN(pScreen);
    XAAOverlayPtr pOverPriv;

    if(!(pOverPriv = xalloc(sizeof(XAAOverlayRec))))
	return FALSE;

    dixSetPrivate(&pScreen->devPrivates, XAAOverlayKey, pOverPriv);

    pOverPriv->pScrn = pScrn;
    pOverPriv->callback = callback;
    pOverPriv->currentDepth = -1;

    /* Overwrite key screen functions.  The XAA core will clean up */

    pScreen->CopyWindow = XAAOverCopyWindow;
    pScreen->WindowExposures = XAAOverWindowExposures;

    pOverPriv->StippledFillChooser = infoRec->StippledFillChooser;
    pOverPriv->OpaqueStippledFillChooser = infoRec->OpaqueStippledFillChooser;
    pOverPriv->TiledFillChooser = infoRec->TiledFillChooser;

    infoRec->StippledFillChooser = XAAOverStippledFillChooser;
    infoRec->OpaqueStippledFillChooser = XAAOverOpaqueStippledFillChooser;
    infoRec->TiledFillChooser = XAAOverTiledFillChooser;

    /* wrap all XAA GC rendering */

    pOverPriv->CopyArea = infoRec->CopyArea;
    pOverPriv->CopyPlane = infoRec->CopyPlane;
    pOverPriv->PushPixelsSolid = infoRec->PushPixelsSolid;
    pOverPriv->PolyFillRectSolid = infoRec->PolyFillRectSolid;
    pOverPriv->PolyFillRectStippled = infoRec->PolyFillRectStippled;
    pOverPriv->PolyFillRectOpaqueStippled = infoRec->PolyFillRectOpaqueStippled;
    pOverPriv->PolyFillRectTiled = infoRec->PolyFillRectTiled;
    pOverPriv->FillSpansSolid = infoRec->FillSpansSolid;
    pOverPriv->FillSpansStippled = infoRec->FillSpansStippled;
    pOverPriv->FillSpansOpaqueStippled = infoRec->FillSpansOpaqueStippled;
    pOverPriv->FillSpansTiled = infoRec->FillSpansTiled;
    pOverPriv->PolyText8TE = infoRec->PolyText8TE;
    pOverPriv->PolyText16TE = infoRec->PolyText16TE;
    pOverPriv->ImageText8TE = infoRec->ImageText8TE;
    pOverPriv->ImageText16TE = infoRec->ImageText16TE;
    pOverPriv->ImageGlyphBltTE = infoRec->ImageGlyphBltTE;
    pOverPriv->PolyGlyphBltTE = infoRec->PolyGlyphBltTE;
    pOverPriv->PolyText8NonTE = infoRec->PolyText8NonTE;
    pOverPriv->PolyText16NonTE = infoRec->PolyText16NonTE;
    pOverPriv->ImageText8NonTE = infoRec->ImageText8NonTE;
    pOverPriv->ImageText16NonTE = infoRec->ImageText16NonTE;
    pOverPriv->ImageGlyphBltNonTE = infoRec->ImageGlyphBltNonTE;
    pOverPriv->PolyGlyphBltNonTE = infoRec->PolyGlyphBltNonTE;
    pOverPriv->PolyRectangleThinSolid = infoRec->PolyRectangleThinSolid;
    pOverPriv->PolylinesWideSolid = infoRec->PolylinesWideSolid;
    pOverPriv->PolylinesThinSolid = infoRec->PolylinesThinSolid;
    pOverPriv->PolySegmentThinSolid = infoRec->PolySegmentThinSolid;
    pOverPriv->PolylinesThinDashed = infoRec->PolylinesThinDashed;
    pOverPriv->PolySegmentThinDashed = infoRec->PolySegmentThinDashed;
    pOverPriv->FillPolygonSolid = infoRec->FillPolygonSolid;
    pOverPriv->FillPolygonStippled = infoRec->FillPolygonStippled;
    pOverPriv->FillPolygonOpaqueStippled = infoRec->FillPolygonOpaqueStippled;
    pOverPriv->FillPolygonTiled = infoRec->FillPolygonTiled;
    pOverPriv->PolyFillArcSolid = infoRec->PolyFillArcSolid;
    pOverPriv->PutImage = infoRec->PutImage;


    if(infoRec->CopyArea)
	infoRec->CopyArea = XAAOverCopyArea;
    if(infoRec->CopyPlane)
	infoRec->CopyPlane = XAAOverCopyPlane;
    if(infoRec->PushPixelsSolid)
	infoRec->PushPixelsSolid = XAAOverPushPixelsSolid;
    if(infoRec->PolyFillRectSolid)
	infoRec->PolyFillRectSolid = XAAOverPolyFillRectSolid;
    if(infoRec->PolyFillRectStippled)
	infoRec->PolyFillRectStippled = XAAOverPolyFillRectStippled;
    if(infoRec->PolyFillRectOpaqueStippled)
	infoRec->PolyFillRectOpaqueStippled = XAAOverPolyFillRectOpaqueStippled;
    if(infoRec->PolyFillRectTiled)
	infoRec->PolyFillRectTiled = XAAOverPolyFillRectTiled;
    if(infoRec->FillSpansSolid)
	infoRec->FillSpansSolid = XAAOverFillSpansSolid;
    if(infoRec->FillSpansStippled)
	infoRec->FillSpansStippled = XAAOverFillSpansStippled;
    if(infoRec->FillSpansOpaqueStippled)
	infoRec->FillSpansOpaqueStippled = XAAOverFillSpansOpaqueStippled;
    if(infoRec->FillSpansTiled)
	infoRec->FillSpansTiled = XAAOverFillSpansTiled;
    if(infoRec->PolyText8TE)
	infoRec->PolyText8TE = XAAOverPolyText8TE;
    if(infoRec->PolyText16TE)
	infoRec->PolyText16TE = XAAOverPolyText16TE;
    if(infoRec->ImageText8TE)
	infoRec->ImageText8TE = XAAOverImageText8TE;
    if(infoRec->ImageText16TE)
	infoRec->ImageText16TE = XAAOverImageText16TE;
    if(infoRec->ImageGlyphBltTE)
	infoRec->ImageGlyphBltTE = XAAOverImageGlyphBltTE;
    if(infoRec->PolyGlyphBltTE)
	infoRec->PolyGlyphBltTE = XAAOverPolyGlyphBltTE;
    if(infoRec->PolyText8NonTE)
	infoRec->PolyText8NonTE = XAAOverPolyText8NonTE;
    if(infoRec->PolyText16NonTE)
	infoRec->PolyText16NonTE = XAAOverPolyText16NonTE;
    if(infoRec->ImageText8NonTE)
	infoRec->ImageText8NonTE = XAAOverImageText8NonTE;
    if(infoRec->ImageText16NonTE)
	infoRec->ImageText16NonTE = XAAOverImageText16NonTE;
    if(infoRec->ImageGlyphBltNonTE)
	infoRec->ImageGlyphBltNonTE = XAAOverImageGlyphBltNonTE;
    if(infoRec->PolyGlyphBltNonTE)
	infoRec->PolyGlyphBltNonTE = XAAOverPolyGlyphBltNonTE;
    if(infoRec->PolyRectangleThinSolid)
	infoRec->PolyRectangleThinSolid = XAAOverPolyRectangleThinSolid;
    if(infoRec->PolylinesWideSolid)
	infoRec->PolylinesWideSolid = XAAOverPolylinesWideSolid;
    if(infoRec->PolylinesThinSolid)
	infoRec->PolylinesThinSolid = XAAOverPolylinesThinSolid;
    if(infoRec->PolySegmentThinSolid)
	infoRec->PolySegmentThinSolid = XAAOverPolySegmentThinSolid;
    if(infoRec->PolylinesThinDashed)
	infoRec->PolylinesThinDashed = XAAOverPolylinesThinDashed;
    if(infoRec->PolySegmentThinDashed)
	infoRec->PolySegmentThinDashed = XAAOverPolySegmentThinDashed;
    if(infoRec->FillPolygonSolid)
	infoRec->FillPolygonSolid = XAAOverFillPolygonSolid;
    if(infoRec->FillPolygonStippled)
	infoRec->FillPolygonStippled = XAAOverFillPolygonStippled;
    if(infoRec->FillPolygonOpaqueStippled)
	infoRec->FillPolygonOpaqueStippled = XAAOverFillPolygonOpaqueStippled;
    if(infoRec->FillPolygonTiled)
	infoRec->FillPolygonTiled = XAAOverFillPolygonTiled;
    if(infoRec->PolyFillArcSolid)
	infoRec->PolyFillArcSolid = XAAOverPolyFillArcSolid;
    if(infoRec->PutImage)
	infoRec->PutImage = XAAOverPutImage;

    return TRUE;
}

/***********************  Screen functions ************************/

void
XAAOverCopyWindow(
    WindowPtr pWin,
    DDXPointRec ptOldOrg,
    RegionPtr prgnSrc
){
    ScreenPtr pScreen = pWin->drawable.pScreen;
    XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCREEN(pScreen);
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pScreen);
    ScrnInfoPtr pScrn = infoRec->pScrn;
    DDXPointPtr ppt, pptSrc;
    RegionRec rgnDst;
    BoxPtr pbox;
    int i, nbox, dx, dy;
    WindowPtr pRoot = WindowTable[pScreen->myNum];


    if (!pScrn->vtSema || !infoRec->ScreenToScreenBitBlt) { 
	XAA_SCREEN_PROLOGUE (pScreen, CopyWindow);
	if(pScrn->vtSema && infoRec->NeedToSync) {
	    (*infoRec->Sync)(pScrn);
	    infoRec->NeedToSync = FALSE;
	}
        (*pScreen->CopyWindow) (pWin, ptOldOrg, prgnSrc);
	XAA_SCREEN_EPILOGUE (pScreen, CopyWindow, XAAOverCopyWindow);
    	return;
    }

    infoRec->ScratchGC.alu = GXcopy;
    infoRec->ScratchGC.planemask = ~0;

    REGION_NULL(pScreen, &rgnDst);

    dx = ptOldOrg.x - pWin->drawable.x;
    dy = ptOldOrg.y - pWin->drawable.y;
    REGION_TRANSLATE(pScreen, prgnSrc, -dx, -dy);
    REGION_INTERSECT(pScreen, &rgnDst, &pWin->borderClip, prgnSrc);

    nbox = REGION_NUM_RECTS(&rgnDst);
    if(nbox &&
	(pptSrc = (DDXPointPtr )xalloc(nbox * sizeof(DDXPointRec)))) {

	pbox = REGION_RECTS(&rgnDst);
	for (i = nbox, ppt = pptSrc; i--; ppt++, pbox++) {
	    ppt->x = pbox->x1 + dx;
	    ppt->y = pbox->y1 + dy;
	}

	SWITCH_DEPTH(8);
	XAADoBitBlt((DrawablePtr)pRoot, (DrawablePtr)pRoot,
        		&(infoRec->ScratchGC), &rgnDst, pptSrc);

	if(pWin->drawable.bitsPerPixel != 8) {
	    SWITCH_DEPTH(pScrn->depth);
	    XAADoBitBlt((DrawablePtr)pRoot, (DrawablePtr)pRoot,
        		&(infoRec->ScratchGC), &rgnDst, pptSrc);
	}

	xfree(pptSrc);
    }

    REGION_UNINIT(pScreen, &rgnDst);

    if(pWin->drawable.depth == 8) {
      REGION_NULL(pScreen, &rgnDst);
      miSegregateChildren(pWin, &rgnDst, pScrn->depth);
      if(REGION_NOTEMPTY(pScreen, &rgnDst)) {
	REGION_INTERSECT(pScreen, &rgnDst, &rgnDst, prgnSrc);
	nbox = REGION_NUM_RECTS(&rgnDst);
	if(nbox &&
	  (pptSrc = (DDXPointPtr )xalloc(nbox * sizeof(DDXPointRec)))){

	    pbox = REGION_RECTS(&rgnDst);
	    for (i = nbox, ppt = pptSrc; i--; ppt++, pbox++) {
		ppt->x = pbox->x1 + dx;
		ppt->y = pbox->y1 + dy;
	    }

	    SWITCH_DEPTH(pScrn->depth);
	    XAADoBitBlt((DrawablePtr)pRoot, (DrawablePtr)pRoot,
        		&(infoRec->ScratchGC), &rgnDst, pptSrc);
	    xfree(pptSrc);
	}
      }
      REGION_UNINIT(pScreen, &rgnDst);
    }
}


void
XAAOverWindowExposures(
   WindowPtr pWin,
   RegionPtr pReg,
   RegionPtr pOtherReg
){
    ScreenPtr pScreen = pWin->drawable.pScreen;
    XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCREEN(pScreen);

    if((pWin->drawable.bitsPerPixel != 8) && infoRec->pScrn->vtSema) {
	if(REGION_NUM_RECTS(pReg) && infoRec->FillSolidRects) {
	    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pScreen);

	    SWITCH_DEPTH(8);
	    (*infoRec->FillSolidRects)(infoRec->pScrn, 
		infoRec->pScrn->colorKey, GXcopy, ~0,
			REGION_NUM_RECTS(pReg), REGION_RECTS(pReg));
	    miWindowExposures(pWin, pReg, pOtherReg);
	    return;
	} else if(infoRec->NeedToSync) {
            (*infoRec->Sync)(infoRec->pScrn);
            infoRec->NeedToSync = FALSE;
	}
    } 

    XAA_SCREEN_PROLOGUE (pScreen, WindowExposures);
    (*pScreen->WindowExposures) (pWin, pReg, pOtherReg);
    XAA_SCREEN_EPILOGUE(pScreen, WindowExposures, XAAOverWindowExposures);
}

/*********************  Choosers *************************/

static int 
XAAOverStippledFillChooser(GCPtr pGC)
{
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);
    int ret;

    ret = (*pOverPriv->StippledFillChooser)(pGC);
    
    if((pGC->depth == 8) && 
	((ret == DO_COLOR_8x8) || (ret == DO_CACHE_BLT))) {
	ret = 0;
    }

    return ret;
}

static int 
XAAOverOpaqueStippledFillChooser(GCPtr pGC)
{
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);
    int ret;

    ret = (*pOverPriv->OpaqueStippledFillChooser)(pGC);
    
    if((pGC->depth == 8) && 
	((ret == DO_COLOR_8x8) || (ret == DO_CACHE_BLT))) {
	ret = 0;
    }

    return ret;
}

static int 
XAAOverTiledFillChooser(GCPtr pGC)
{
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);
    int ret;

    ret = (*pOverPriv->TiledFillChooser)(pGC);
    
    if((pGC->depth == 8) && 
	((ret == DO_COLOR_8x8) || (ret == DO_CACHE_BLT))) {
	ret = 0;
    }

    return ret;
}


/**************************** GC Functions **************************/

static RegionPtr 
XAAOverCopyArea(
   DrawablePtr pSrc,
   DrawablePtr pDst,
   GC *pGC,
   int srcx, int srcy,
   int width, int height,
   int dstx, int dsty
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    return (*pOverPriv->CopyArea)(pSrc, pDst, 
		pGC, srcx, srcy, width, height, dstx, dsty);
}

static RegionPtr 
XAAOverCopyPlane(
   DrawablePtr pSrc,
   DrawablePtr pDst,
   GCPtr pGC,
   int srcx, int srcy,
   int width, int height,
   int dstx, int dsty,
   unsigned long bitPlane
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    return (*pOverPriv->CopyPlane)(pSrc, pDst,
	       pGC, srcx, srcy, width, height, dstx, dsty, bitPlane);

}

static void 
XAAOverPushPixelsSolid(
   GCPtr pGC,
   PixmapPtr pBitMap,
   DrawablePtr pDraw,
   int dx, int dy, 
   int xOrg, int yOrg
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PushPixelsSolid)(pGC, pBitMap, pDraw, dx, dy, xOrg, yOrg);
}



static void 
XAAOverPolyFillRectSolid(
   DrawablePtr pDraw,
   GCPtr pGC,
   int nrectFill, 	
   xRectangle *prectInit
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyFillRectSolid)(pDraw, pGC, nrectFill, prectInit);
}  

static void 
XAAOverPolyFillRectStippled(
   DrawablePtr pDraw,
   GCPtr pGC,
   int nrectFill, 	
   xRectangle *prectInit
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyFillRectStippled)(pDraw, pGC, nrectFill, prectInit);
}  


static void 
XAAOverPolyFillRectOpaqueStippled(
   DrawablePtr pDraw,
   GCPtr pGC,
   int nrectFill, 	
   xRectangle *prectInit
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyFillRectOpaqueStippled)(pDraw, pGC, nrectFill, prectInit);
}  

static void 
XAAOverPolyFillRectTiled(
   DrawablePtr pDraw,
   GCPtr pGC,
   int nrectFill, 	
   xRectangle *prectInit
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyFillRectTiled)(pDraw, pGC, nrectFill, prectInit);
}  


static void 
XAAOverFillSpansSolid(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		nInit,
   DDXPointPtr 	ppt,
   int		*pwidth,
   int		fSorted 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillSpansSolid)(
		pDraw, pGC, nInit, ppt, pwidth, fSorted);
}


static void 
XAAOverFillSpansStippled(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		nInit,
   DDXPointPtr 	ppt,
   int		*pwidth,
   int		fSorted 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillSpansStippled)(pDraw, pGC, nInit, ppt, pwidth, fSorted);
}

static void 
XAAOverFillSpansOpaqueStippled(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		nInit,
   DDXPointPtr 	ppt,
   int		*pwidth,
   int		fSorted 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillSpansOpaqueStippled)(
		pDraw, pGC, nInit, ppt, pwidth, fSorted);
}


static void 
XAAOverFillSpansTiled(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		nInit,
   DDXPointPtr 	ppt,
   int		*pwidth,
   int		fSorted 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillSpansTiled)(pDraw, pGC, nInit, ppt, pwidth, fSorted);
}

static int 
XAAOverPolyText8TE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   char *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    return (*pOverPriv->PolyText8TE)(pDraw, pGC, x, y, count, chars);
}


static int
XAAOverPolyText16TE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   unsigned short *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    return (*pOverPriv->PolyText16TE)(pDraw, pGC, x, y, count, chars);
}


static void 
XAAOverImageText8TE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   char *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->ImageText8TE)(pDraw, pGC, x, y, count, chars);
}


static void 
XAAOverImageText16TE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   unsigned short *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->ImageText16TE)(pDraw, pGC, x, y, count, chars);
}

static void 
XAAOverImageGlyphBltTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int xInit, int yInit,
   unsigned int nglyph,
   CharInfoPtr *ppci,
   pointer pglyphBase 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->ImageGlyphBltTE)(
	pDraw, pGC, xInit, yInit, nglyph, ppci, pglyphBase);
}

static void 
XAAOverPolyGlyphBltTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int xInit, int yInit,
   unsigned int nglyph,
   CharInfoPtr *ppci,
   pointer pglyphBase 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyGlyphBltTE)(
	pDraw, pGC, xInit, yInit, nglyph, ppci, pglyphBase);
}

static int 
XAAOverPolyText8NonTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   char *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    return (*pOverPriv->PolyText8NonTE)(pDraw, pGC, x, y, count, chars);
}


static int 
XAAOverPolyText16NonTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   unsigned short *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    return (*pOverPriv->PolyText16NonTE)(pDraw, pGC, x, y, count, chars);
}

static void 
XAAOverImageText8NonTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   char *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->ImageText8NonTE)(pDraw, pGC, x, y, count, chars);
}

static void 
XAAOverImageText16NonTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int x, int y,
   int count,
   unsigned short *chars
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->ImageText16NonTE)(pDraw, pGC, x, y, count, chars);
}


static void 
XAAOverImageGlyphBltNonTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int xInit, int yInit,
   unsigned int nglyph,
   CharInfoPtr *ppci,
   pointer pglyphBase 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->ImageGlyphBltNonTE)(
		pDraw, pGC, xInit, yInit, nglyph, ppci, pglyphBase);
}

static void 
XAAOverPolyGlyphBltNonTE(
   DrawablePtr pDraw,
   GCPtr pGC,
   int xInit, int yInit,
   unsigned int nglyph,
   CharInfoPtr *ppci,
   pointer pglyphBase 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyGlyphBltNonTE)(
		pDraw, pGC, xInit, yInit, nglyph, ppci, pglyphBase);
}

static void 
XAAOverPolyRectangleThinSolid(
   DrawablePtr  pDraw,
   GCPtr        pGC,    
   int	    	nRectsInit,
   xRectangle  *pRectsInit 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyRectangleThinSolid)(pDraw, pGC, nRectsInit, pRectsInit);
}



static void 
XAAOverPolylinesWideSolid(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		mode,
   int 		npt,
   DDXPointPtr pPts
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolylinesWideSolid)(pDraw, pGC, mode, npt, pPts);
}


static void 
XAAOverPolylinesThinSolid(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		mode,
   int 		npt,
   DDXPointPtr pPts
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolylinesThinSolid)(pDraw, pGC, mode, npt, pPts);
}

static void 
XAAOverPolySegmentThinSolid(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		nseg,
   xSegment	*pSeg
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolySegmentThinSolid)(pDraw, pGC, nseg, pSeg);
}

static void 
XAAOverPolylinesThinDashed(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		mode,
   int 		npt,
   DDXPointPtr pPts
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolylinesThinDashed)(pDraw, pGC, mode, npt, pPts);
}

static void 
XAAOverPolySegmentThinDashed(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		nseg,
   xSegment	*pSeg
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolySegmentThinDashed)(pDraw, pGC, nseg, pSeg);
}


static void 
XAAOverFillPolygonSolid(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		shape,
   int		mode,
   int		count,
   DDXPointPtr	ptsIn 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillPolygonSolid)(pDraw, pGC, shape, mode, count, ptsIn);
}

static void 
XAAOverFillPolygonStippled(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		shape,
   int		mode,
   int		count,
   DDXPointPtr	ptsIn 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillPolygonStippled)(pDraw, pGC, shape, mode, count, ptsIn);
}


static void 
XAAOverFillPolygonOpaqueStippled(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		shape,
   int		mode,
   int		count,
   DDXPointPtr	ptsIn 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillPolygonOpaqueStippled)(
			pDraw, pGC, shape, mode, count, ptsIn);
}

static void 
XAAOverFillPolygonTiled(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		shape,
   int		mode,
   int		count,
   DDXPointPtr	ptsIn 
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->FillPolygonTiled)(pDraw, pGC, shape, mode, count, ptsIn);
}


static void 
XAAOverPolyFillArcSolid(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		narcs,
   xArc		*parcs
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PolyFillArcSolid)(pDraw, pGC, narcs, parcs);
}


static void 
XAAOverPutImage(
   DrawablePtr	pDraw,
   GCPtr	pGC,
   int		depth, 
   int		x, 
   int		y, 
   int		w, 
   int		h,
   int		leftPad,
   int		format,
   char		*pImage
){
    XAAOverlayPtr pOverPriv = GET_OVERLAY_PRIV(pGC->pScreen);

    SWITCH_DEPTH(pGC->depth);

    (*pOverPriv->PutImage)(pDraw, pGC, depth, x, y, w, h, 
				leftPad, format, pImage);
}