/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaImage.c,v 1.20tsi Exp $ */

#include "misc.h"
#include "xf86.h"
#include "xf86_ansic.h"
#include "xf86_OSproc.h"
#include "servermd.h"

#include "X.h"
#include "scrnintstr.h"
#include "mi.h"
#include "pixmapstr.h"
#include "xf86str.h"
#include "xaa.h"
#include "xaalocal.h"

void XAAMoveDWORDS_FixedBase(
   register CARD32* dest,
   register CARD32* src,
   register int dwords )
{
     while(dwords & ~0x03) {
	 *dest = *src;
	 *dest = *(src + 1);
	 *dest = *(src + 2);
	 *dest = *(src + 3);	
	 dwords -= 4;
	 src += 4;
     }

     if(!dwords) return;
     *dest = *src;
     if(dwords == 1) return;
     *dest = *(src + 1);
     if(dwords == 2) return;
     *dest = *(src + 2);
}

void XAAMoveDWORDS(
   register CARD32* dest,
   register CARD32* src,
   register int dwords )
{
     while(dwords & ~0x03) {
	*dest = *src;
	*(dest + 1) = *(src + 1);
	*(dest + 2) = *(src + 2);
	*(dest + 3) = *(src + 3);
	src += 4;
	dest += 4;
	dwords -= 4;
     }	
     if(!dwords) return;
     *dest = *src;
     if(dwords == 1) return;
     *(dest + 1) = *(src + 1);
     if(dwords == 2) return;
     *(dest + 2) = *(src + 2);
}

void XAAMoveDWORDS_FixedSrc(
   register CARD32* dest,
   register CARD32* src,
   register int dwords )
{
     while(dwords & ~0x03) {
	*dest = *src;
	*(dest + 1) = *src;
	*(dest + 2) = *src;
	*(dest + 3) = *src;
	dest += 4;
	dwords -= 4;
     }	
     if(!dwords) return;
     *dest = *src;
     if(dwords == 1) return;
     *(dest + 1) = *src;
     if(dwords == 2) return;
     *(dest + 2) = *src;
}

static void
XAAWritePixmap32To24(
   ScrnInfoPtr pScrn,
   int x, int y, int w, int h,
   unsigned char *srcInit,	
   int srcwidth,	/* bytes */
   int rop,
   unsigned int planemask,
   int trans
){
    XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
    int count, dwords = ((w * 3) + 3) >> 2;
    CARD32 *src, *dst;
    Bool PlusOne = FALSE;

    if((infoRec->ImageWriteFlags & CPU_TRANSFER_PAD_QWORD) && 
					((dwords * h) & 0x01)) {
	PlusOne = TRUE;
    }

    (*infoRec->SetupForImageWrite)(pScrn, rop, planemask, trans, 24, 24);
    (*infoRec->SubsequentImageWriteRect)(pScrn, x, y, w, h, 0);
  
    if(dwords > infoRec->ImageWriteRange) {
	dst = (CARD32*)infoRec->ImageWriteBase;
	while(h--) {
	    src = (CARD32*)srcInit;
  	    count = w;

	    while(count >= 4) {
		*dst = (src[0] & 0x00ffffff) | (src[1] << 24);
		*dst = ((src[1] >> 8) & 0x0000ffff) | (src[2] << 16);
		*dst = ((src[2] >> 16) & 0x000000ff) | (src[3] << 8);
		src += 4;
		count -= 4;
	    }
	    switch(count) {
	    case 0:	break;
	    case 1:	*dst = src[0];
			break;
	    case 2:	*dst = (src[0] & 0x00ffffff) | (src[1] << 24);
			*dst = src[1] >> 8;
			break;
	    default:	*dst = (src[0] & 0x00ffffff) | (src[1] << 24);
			*dst = ((src[1] >> 8) & 0x0000ffff) | (src[2] << 16);
			*dst = src[2] >> 16;
			break;
	    }
	    srcInit += srcwidth;
	}
    } else {
	while(h--) {
	    dst = (CARD32*)infoRec->ImageWriteBase;
	    src = (CARD32*)srcInit;
  	    count = w;

	    while(count >= 4) {
		dst[0] = (src[0] & 0x00ffffff) | (src[1] << 24);
		dst[1] = ((src[1] >> 8) & 0x0000ffff) | (src[2] << 16);
		dst[2] = ((src[2] >> 16) & 0x000000ff) | (src[3] << 8);
		dst += 3;
		src += 4;
		count -= 4;
	    }
	    switch(count) {
	    case 0:	break;
	    case 1:	dst[0] = src[0];
			break;
	    case 2:	dst[0] = (src[0] & 0x00ffffff) | (src[1] << 24);
			dst[1] = src[1] >> 8;
			break;
	    default:	dst[0] = (src[0] & 0x00ffffff) | (src[1] << 24);
			dst[1] = ((src[1] >> 8) & 0x0000ffff) | (src[2] << 16);
			dst[2] = src[2] >> 16;
			break;
	    }
	    srcInit += srcwidth;
	}
    }

    if(PlusOne) {
	CARD32* base = (CARD32*)infoRec->ImageWriteBase;
	*base = 0x00000000;
    }

    if(infoRec->ImageWriteFlags & SYNC_AFTER_IMAGE_WRITE)
	(*infoRec->Sync)(pScrn);
    else SET_SYNC_FLAG(infoRec);

}

void 
XAAWritePixmap (
   ScrnInfoPtr pScrn,
   int x, int y, int w, int h,
   unsigned char *src,	
   int srcwidth,	/* bytes */
   int rop,
   unsigned int planemask,
   int trans,
   int bpp, int depth
){
    XAAInfoRecPtr infoRec;
    int dwords, skipleft, Bpp; 
    Bool beCareful, PlusOne;

    if((bpp == 32) && (pScrn->bitsPerPixel == 24)) {
	XAAWritePixmap32To24(pScrn, x, y, w, h, src, srcwidth, 
						rop, planemask, trans);	
	return;
    }

    infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
    beCareful = PlusOne = FALSE;
    Bpp = bpp >> 3;

    if((skipleft = (long)src & 0x03L)) {
	if(!(infoRec->ImageWriteFlags & LEFT_EDGE_CLIPPING)) {
	   skipleft = 0;
	   beCareful = TRUE;
	   goto BAD_ALIGNMENT;
	}

	if(Bpp == 3)
	   skipleft = 4 - skipleft;
	else
	   skipleft /= Bpp;

	if((x < skipleft) && !(infoRec->ImageWriteFlags &
				 LEFT_EDGE_CLIPPING_NEGATIVE_X)) {
	   skipleft = 0;
	   beCareful = TRUE;
	   goto BAD_ALIGNMENT;
	}

	x -= skipleft;	     
	w += skipleft;
	
	if(Bpp == 3)
	   src -= 3 * skipleft;  
	else   /* is this Alpha friendly ? */
	   src = (unsigned char*)((long)src & ~0x03L);     
    }

BAD_ALIGNMENT:

    dwords = ((w * Bpp) + 3) >> 2;

    if((infoRec->ImageWriteFlags & CPU_TRANSFER_PAD_QWORD) && 
						((dwords * h) & 0x01)) {
	PlusOne = TRUE;
    } 
		
	
    (*infoRec->SetupForImageWrite)(pScrn, rop, planemask, trans, bpp, depth);
    (*infoRec->SubsequentImageWriteRect)(pScrn, x, y, w, h, skipleft);

    if(beCareful) {
	/* in cases with bad alignment we have to be careful not
	   to read beyond the end of the source */
	if(((x * Bpp) + (dwords << 2)) > srcwidth) h--;
	else beCareful = FALSE;
    }

    if(dwords > infoRec->ImageWriteRange) {
	while(h--) {
	    XAAMoveDWORDS_FixedBase((CARD32*)infoRec->ImageWriteBase,
		(CARD32*)src, dwords);
	    src += srcwidth;
	}
	if(beCareful) {
	   int shift = ((long)src & 0x03L) << 3;
	   if(--dwords)
		XAAMoveDWORDS_FixedBase((CARD32*)infoRec->ImageWriteBase,
			(CARD32*)src, dwords);
	   src = (unsigned char*)((long)(src + (dwords << 2)) & ~0x03L);
	   *((CARD32*)infoRec->ImageWriteBase) = *((CARD32*)src) >> shift;
	}
    } else {
	if(srcwidth == (dwords << 2)) {
	   int decrement = infoRec->ImageWriteRange/dwords;

	   while(h > decrement) {
		XAAMoveDWORDS((CARD32*)infoRec->ImageWriteBase,
	 		(CARD32*)src, dwords * decrement);
		src += (srcwidth * decrement);
		h -= decrement;
	   }
	   if(h) {
		XAAMoveDWORDS((CARD32*)infoRec->ImageWriteBase,
	 		(CARD32*)src, dwords * h);
		if(beCareful) src += (srcwidth * h);
	   }
	} else {
	    while(h--) {
		XAAMoveDWORDS((CARD32*)infoRec->ImageWriteBase,
	 		(CARD32*)src, dwords);
		src += srcwidth;
	    }
	}

	if(beCareful) {
	    int shift = ((long)src & 0x03L) << 3;
	    if(--dwords)
		XAAMoveDWORDS((CARD32*)infoRec->ImageWriteBase,
					(CARD32*)src, dwords);
	    src = (unsigned char*)((long)(src + (dwords << 2)) & ~0x03L);
     
	    ((CARD32*)infoRec->ImageWriteBase)[dwords] = 
			*((CARD32*)src) >> shift;
	}
    }

    if(PlusOne) {
	CARD32* base = (CARD32*)infoRec->ImageWriteBase;
	*base = 0x00000000;
    }

    if(infoRec->ImageWriteFlags & SYNC_AFTER_IMAGE_WRITE)
	(*infoRec->Sync)(pScrn);
    else SET_SYNC_FLAG(infoRec);
}


void 
XAAWritePixmapScanline (
   ScrnInfoPtr pScrn,
   int x, int y, int w, int h,
   unsigned char *src,	
   int srcwidth,	/* bytes */
   int rop,
   unsigned int planemask,
   int trans,
   int bpp, int depth
){
    XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
    int dwords, skipleft, bufferNo = 0, Bpp = bpp >> 3; 
    Bool beCareful = FALSE;
    CARD32* base;

    if((skipleft = (long)src & 0x03L)) {
	if(!(infoRec->ScanlineImageWriteFlags & LEFT_EDGE_CLIPPING)) {
	   skipleft = 0;
	   beCareful = TRUE;
	   goto BAD_ALIGNMENT;
	}

	if(Bpp == 3)
	   skipleft = 4 - skipleft;
	else
	   skipleft /= Bpp;

	if((x < skipleft) && !(infoRec->ScanlineImageWriteFlags &
				 LEFT_EDGE_CLIPPING_NEGATIVE_X)) {
	   skipleft = 0;
	   beCareful = TRUE;
	   goto BAD_ALIGNMENT;
	}

	x -= skipleft;	     
	w += skipleft;
	
	if(Bpp == 3)
	   src -= 3 * skipleft;  
	else
	   src = (unsigned char*)((long)src & ~0x03L);     
    }

BAD_ALIGNMENT:

    dwords = ((w * Bpp) + 3) >> 2;

    (*infoRec->SetupForScanlineImageWrite)(
				pScrn, rop, planemask, trans, bpp, depth);
    (*infoRec->SubsequentScanlineImageWriteRect)(pScrn, x, y, w, h, skipleft);

    if(beCareful) {
	/* in cases with bad alignment we have to be careful not
	   to read beyond the end of the source */
	if(((x * Bpp) + (dwords << 2)) > srcwidth) h--;
	else beCareful = FALSE;
    }

    while(h--) {
	base = (CARD32*)infoRec->ScanlineImageWriteBuffers[bufferNo];
	XAAMoveDWORDS(base, (CARD32*)src, dwords);
	(*infoRec->SubsequentImageWriteScanline)(pScrn, bufferNo++);
	src += srcwidth;
	if(bufferNo >= infoRec->NumScanlineImageWriteBuffers)
	    bufferNo = 0;
    }

    if(beCareful) {
	int shift = ((long)src & 0x03L) << 3;
	base = (CARD32*)infoRec->ScanlineImageWriteBuffers[bufferNo];
	if(--dwords)
	    XAAMoveDWORDS(base,(CARD32*)src, dwords);
	src = (unsigned char*)((long)(src + (dwords << 2)) & ~0x03L);
     
	base[dwords] = *((CARD32*)src) >> shift;
	(*infoRec->SubsequentImageWriteScanline)(pScrn, bufferNo);
    }

    SET_SYNC_FLAG(infoRec);
}


void
XAAPutImage(
    DrawablePtr pDraw,
    GCPtr       pGC,
    int         depth, 
    int 	x, 
    int		y, 
    int		w, 
    int		h,
    int         leftPad,
    int         format,
    char        *pImage
){
    XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
    int bpp = BitsPerPixel(depth);
    Bool depthBug = FALSE;
    if(!w || !h) return;

    if(!REGION_NUM_RECTS(pGC->pCompositeClip))
	return;

    depthBug = XAA_DEPTH_BUG(pGC);

    if(((format == ZPixmap) && infoRec->WritePixmap &&
	     ((pDraw->bitsPerPixel == bpp) ||
		((pDraw->bitsPerPixel == 24) &&  (bpp == 32) &&
		(infoRec->WritePixmapFlags & CONVERT_32BPP_TO_24BPP))) &&
	     CHECK_ROP(pGC,infoRec->WritePixmapFlags) &&
	     CHECK_ROPSRC(pGC,infoRec->WritePixmapFlags) &&
	     CHECK_PLANEMASK(pGC,infoRec->WritePixmapFlags) &&
	     CHECK_NO_GXCOPY(pGC,infoRec->WritePixmapFlags)) ||
       ((format == XYBitmap) && !depthBug && infoRec->WriteBitmap &&
	     CHECK_ROP(pGC,infoRec->WriteBitmapFlags) &&
	     CHECK_ROPSRC(pGC,infoRec->WriteBitmapFlags) &&
	     CHECK_PLANEMASK(pGC,infoRec->WriteBitmapFlags) &&
	     CHECK_COLORS(pGC,infoRec->WriteBitmapFlags) &&
	     !(infoRec->WriteBitmapFlags & TRANSPARENCY_ONLY)) ||
       ((format == XYPixmap) && !depthBug && infoRec->WriteBitmap &&
	     CHECK_ROP(pGC,infoRec->WriteBitmapFlags) &&
	     CHECK_ROPSRC(pGC,infoRec->WriteBitmapFlags) &&
	     !(infoRec->WriteBitmapFlags & NO_PLANEMASK) &&
	     !(infoRec->WriteBitmapFlags & TRANSPARENCY_ONLY))){

	int MaxBoxes = REGION_NUM_RECTS(pGC->pCompositeClip);
	BoxPtr pbox, pClipBoxes;
	int nboxes, srcx, srcy, srcwidth;
	xRectangle TheRect;

	TheRect.x = pDraw->x + x;
	TheRect.y = pDraw->y + y;
	TheRect.width = w;
	TheRect.height = h; 

	if(MaxBoxes > (infoRec->PreAllocSize/sizeof(BoxRec))) {
	    pClipBoxes = xalloc(MaxBoxes * sizeof(BoxRec));
	    if(!pClipBoxes) return;	
	} else pClipBoxes = (BoxPtr)infoRec->PreAllocMem;

	nboxes = XAAGetRectClipBoxes(pGC, pClipBoxes, 1, &TheRect);
	pbox = pClipBoxes;

	if(format == XYBitmap) {
	    srcwidth = BitmapBytePad(leftPad + w);
	    while(nboxes--) {
		srcx = pbox->x1 - TheRect.x + leftPad;
		srcy = pbox->y1 - TheRect.y;
		(*infoRec->WriteBitmap)(infoRec->pScrn, pbox->x1, pbox->y1, 
			pbox->x2 - pbox->x1, pbox->y2 - pbox->y1, 
			(unsigned char*)pImage + 
				(srcwidth * srcy) + ((srcx >> 5) << 2), 
			srcwidth, srcx & 31, pGC->fgPixel, pGC->bgPixel,
	 		pGC->alu, pGC->planemask);
		pbox++;
	    }
        } else if(format == ZPixmap) {
	    int Bpp = bpp >> 3;
	    srcwidth = PixmapBytePad(leftPad + w, depth);
	    while(nboxes--) {
		srcx = pbox->x1 - TheRect.x + leftPad;
		srcy = pbox->y1 - TheRect.y;
		(*infoRec->WritePixmap)(infoRec->pScrn, pbox->x1, pbox->y1, 
			pbox->x2 - pbox->x1, pbox->y2 - pbox->y1, 
			(unsigned char*)pImage + 
				(srcwidth * srcy) + (srcx * Bpp), 
			srcwidth, pGC->alu, pGC->planemask, -1, 
			Bpp << 3, depth);
		pbox++;
	    }
	} else { /* XYPixmap */
	    int depth = pGC->depth;
	    int numBox, increment;
	    unsigned long i, mask;
	    BoxPtr pntBox;
	    
	    srcwidth = BitmapBytePad(w + leftPad);
	    increment = h * srcwidth;
 	    i = 1 << (depth - 1);
	    mask = ~0;

	    if((infoRec->pScrn->overlayFlags & OVERLAY_8_32_PLANAR) &&
							 (pGC->depth == 8)){
		i = 0x80000000;  mask = 0xff000000;
	    }

	    for(; i & mask; i >>= 1, pImage += increment) {
		if(i & pGC->planemask) {
		    pntBox = pbox;
		    numBox = nboxes;
		    while(numBox--) {
			srcx = pntBox->x1 - TheRect.x + leftPad;
			srcy = pntBox->y1 - TheRect.y;
			(*infoRec->WriteBitmap)(infoRec->pScrn, 
				pntBox->x1, pntBox->y1, 
				pntBox->x2 - pntBox->x1, 
				pntBox->y2 - pntBox->y1, 
				(unsigned char*)pImage + 
				(srcwidth * srcy) + ((srcx >> 5) << 2), 
				srcwidth, srcx & 31, ~0, 0, pGC->alu, i);
			pntBox++;
	    	    }
		}
	    }

	}

	if(pClipBoxes != (BoxPtr)infoRec->PreAllocMem)
	    xfree(pClipBoxes);
    } else 
	XAAFallbackOps.PutImage(pDraw, pGC, depth, x, y, w, h, leftPad, 
				format, pImage);
}