/*
 *  ReactOS W32 Subsystem
 *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
/* $Id$
 *
 * COPYRIGHT:        See COPYING in the top level directory
 * PROJECT:          ReactOS kernel
 * PURPOSE:          GDI EngCopyBits Function
 * FILE:             subsys/win32k/eng/copybits.c
 * PROGRAMER:        Jason Filby
 * REVISION HISTORY:
 *        8/18/1999: Created
 */

#include <ddk/winddi.h>
#include <ddk/ntddmou.h>
#include "objects.h"
#include "clip.h"
#include "../dib/dib.h"
#include <include/mouse.h>
#include <include/object.h>
#include <include/eng.h>

/*
 * @implemented
 */
BOOL STDCALL
EngCopyBits(SURFOBJ *Dest,
	    SURFOBJ *Source,
	    CLIPOBJ *Clip,
	    XLATEOBJ *ColorTranslation,
	    RECTL *DestRect,
	    POINTL *SourcePoint)
{
  BOOLEAN   ret;
  SURFGDI   *DestGDI, *SourceGDI;
  BYTE      clippingType;
  RECTL     rclTmp;
  POINTL    ptlTmp;
  RECT_ENUM RectEnum;
  BOOL      EnumMore;

  MouseSafetyOnDrawStart(Source, SourceGDI, SourcePoint->x, SourcePoint->y,
                         (SourcePoint->x + abs(DestRect->right - DestRect->left)),
                         (SourcePoint->y + abs(DestRect->bottom - DestRect->top)));
  MouseSafetyOnDrawStart(Dest, DestGDI, DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);

  // FIXME: Don't punt to the driver's DrvCopyBits immediately. Instead,
  //        mark the copy block function to be DrvCopyBits instead of the
  //        GDI's copy bit function so as to remove clipping from the
  //        driver's responsibility

  // If one of the surfaces isn't managed by the GDI
  if((Dest->iType!=STYPE_BITMAP) || (Source->iType!=STYPE_BITMAP))
  {
    // Destination surface is device managed
    if(Dest->iType!=STYPE_BITMAP)
    {
      DestGDI = (PSURFGDI)AccessInternalObjectFromUserObject(Dest);

      if (DestGDI->CopyBits!=NULL)
      {
        ret = DestGDI->CopyBits(Dest, Source, Clip, ColorTranslation, DestRect, SourcePoint);

        MouseSafetyOnDrawEnd(Source, SourceGDI);
        MouseSafetyOnDrawEnd(Dest, DestGDI);

        return ret;
      }
    }

    // Source surface is device managed
    if(Source->iType!=STYPE_BITMAP)
    {
      SourceGDI = (PSURFGDI)AccessInternalObjectFromUserObject(Source);

      if (SourceGDI->CopyBits!=NULL)
      {
        ret = SourceGDI->CopyBits(Dest, Source, Clip, ColorTranslation, DestRect, SourcePoint);

        MouseSafetyOnDrawEnd(Source, SourceGDI);
        MouseSafetyOnDrawEnd(Dest, DestGDI);

        return ret;
      }
    }

    // If CopyBits wasn't hooked, BitBlt must be
    ret = EngBitBlt(Dest, Source,
                    NULL, Clip, ColorTranslation, DestRect, SourcePoint,
                    NULL, NULL, NULL, 0);

    MouseSafetyOnDrawEnd(Source, SourceGDI);
    MouseSafetyOnDrawEnd(Dest, DestGDI);

    return ret;
  }

  // Determine clipping type
  if (Clip == (CLIPOBJ *) NULL)
  {
    clippingType = DC_TRIVIAL;
  } else {
    clippingType = Clip->iDComplexity;
  }

  SourceGDI = (PSURFGDI)AccessInternalObjectFromUserObject(Source);
  DestGDI   = (PSURFGDI)AccessInternalObjectFromUserObject(Dest);

  switch(clippingType)
    {
      case DC_TRIVIAL:
        DestGDI->DIB_BitBlt(Dest, Source, DestGDI, SourceGDI, DestRect, SourcePoint, NULL, NULL, ColorTranslation, SRCCOPY);

        MouseSafetyOnDrawEnd(Source, SourceGDI);
        MouseSafetyOnDrawEnd(Dest, DestGDI);

        return(TRUE);

      case DC_RECT:
        // Clip the blt to the clip rectangle
        EngIntersectRect(&rclTmp, DestRect, &Clip->rclBounds);

        ptlTmp.x = SourcePoint->x + rclTmp.left - DestRect->left;
        ptlTmp.y = SourcePoint->y + rclTmp.top  - DestRect->top;

        DestGDI->DIB_BitBlt(Dest, Source, DestGDI, SourceGDI, &rclTmp, &ptlTmp, NULL, NULL, ColorTranslation, SRCCOPY);

        MouseSafetyOnDrawEnd(Source, SourceGDI);
        MouseSafetyOnDrawEnd(Dest, DestGDI);

        return(TRUE);

      case DC_COMPLEX:

        CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_ANY, ENUM_RECT_LIMIT);

        do {
          EnumMore = CLIPOBJ_bEnum(Clip,(ULONG) sizeof(RectEnum), (PVOID) &RectEnum);

          if (RectEnum.c > 0)
          {
            RECTL* prclEnd = &RectEnum.arcl[RectEnum.c];
            RECTL* prcl    = &RectEnum.arcl[0];

            do {
              EngIntersectRect(prcl, prcl, DestRect);

              ptlTmp.x = SourcePoint->x + prcl->left - DestRect->left;
              ptlTmp.y = SourcePoint->y + prcl->top - DestRect->top;

              if(!DestGDI->DIB_BitBlt(Dest, Source, DestGDI, SourceGDI,
                                      prcl, &ptlTmp, NULL, NULL, ColorTranslation, SRCCOPY)) return FALSE;

              prcl++;

              } while (prcl < prclEnd);
            }

          } while(EnumMore);

          MouseSafetyOnDrawEnd(Source, SourceGDI);

          MouseSafetyOnDrawEnd(Dest, DestGDI);

          return(TRUE);
    }

  MouseSafetyOnDrawEnd(Source, SourceGDI);
  MouseSafetyOnDrawEnd(Dest, DestGDI);

  return FALSE;
}

/* EOF */