subsys/win32k/eng/misc.c

   1 /*
   2  *  ReactOS W32 Subsystem
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /* $Id$ */
  20 #include <ddk/winddi.h>
  21 #include <include/dib.h>
  22 #include <include/object.h>
  23 #include <include/surface.h>
  24 #include "misc.h"
  25 #include "objects.h"
  26
  27 BOOL STDCALL
  28 IntEngEnter(PINTENG_ENTER_LEAVE EnterLeave,
  29             SURFOBJ *DestObj,
  30             RECTL *DestRect,
  31             BOOL ReadOnly,
  32             POINTL *Translate,
  33             SURFOBJ **OutputObj)
  34 {
  35   LONG Exchange;
  36   SIZEL BitmapSize;
  37   POINTL SrcPoint;
  38   LONG Width;
  39
  40   /* Normalize */
  41   if (DestRect->right < DestRect->left)
  42     {
  43     Exchange = DestRect->left;
  44     DestRect->left = DestRect->right;
  45     DestRect->right = Exchange;
  46     }
  47   if (DestRect->bottom < DestRect->top)
  48     {
  49     Exchange = DestRect->top;
  50     DestRect->top = DestRect->bottom;
  51     DestRect->bottom = Exchange;
  52     }
  53
  54   if (NULL != DestObj && STYPE_BITMAP != DestObj->iType &&
  55       (NULL == DestObj->pvScan0 || 0 == DestObj->lDelta))
  56     {
  57     EnterLeave->DestGDI = (SURFGDI*)AccessInternalObjectFromUserObject(DestObj);
  58     /* Driver needs to support DrvCopyBits, else we can't do anything */
  59     if (NULL == EnterLeave->DestGDI->CopyBits)
  60       {
  61       return FALSE;
  62       }
  63
  64     /* Allocate a temporary bitmap */
  65     BitmapSize.cx = DestRect->right - DestRect->left;
  66     BitmapSize.cy = DestRect->bottom - DestRect->top;
  67     Width = DIB_GetDIBWidthBytes(BitmapSize.cx, BitsPerFormat(DestObj->iBitmapFormat));
  68     EnterLeave->OutputBitmap = EngCreateBitmap(BitmapSize, Width,
  69                                                DestObj->iBitmapFormat,
  70                                                BMF_NOZEROINIT, NULL);
  71     *OutputObj = (SURFOBJ *) AccessUserObject((ULONG) EnterLeave->OutputBitmap);
  72
  73     EnterLeave->DestRect.left = 0;
  74     EnterLeave->DestRect.top = 0;
  75     EnterLeave->DestRect.right = BitmapSize.cx;
  76     EnterLeave->DestRect.bottom = BitmapSize.cy;
  77     SrcPoint.x = DestRect->left;
  78     SrcPoint.y = DestRect->top;
  79     EnterLeave->TrivialClipObj = EngCreateClip();
  80     EnterLeave->TrivialClipObj->iDComplexity = DC_TRIVIAL;
  81     if (! EnterLeave->DestGDI->CopyBits(*OutputObj, DestObj,
  82                                         EnterLeave->TrivialClipObj, NULL,
  83                                         &EnterLeave->DestRect, &SrcPoint))
  84       {
  85       EngDeleteClip(EnterLeave->TrivialClipObj);
  86       EngFreeMem((*OutputObj)->pvBits);
  87       EngDeleteSurface(EnterLeave->OutputBitmap);
  88       return FALSE;
  89       }
  90     EnterLeave->DestRect.left = DestRect->left;
  91     EnterLeave->DestRect.top = DestRect->top;
  92     EnterLeave->DestRect.right = DestRect->right;
  93     EnterLeave->DestRect.bottom = DestRect->bottom;
  94     Translate->x = - DestRect->left;
  95     Translate->y = - DestRect->top;
  96     }
  97   else
  98     {
  99     Translate->x = 0;
 100     Translate->y = 0;
 101     *OutputObj = DestObj;
 102     }
 103
 104   EnterLeave->DestObj = DestObj;
 105   EnterLeave->OutputObj = *OutputObj;
 106   EnterLeave->ReadOnly = ReadOnly;
 107
 108   return TRUE;
 109 }
 110
 111 BOOL STDCALL
 112 IntEngLeave(PINTENG_ENTER_LEAVE EnterLeave)
 113 {
 114   POINTL SrcPoint;
 115   BOOL Result;
 116
 117   if (EnterLeave->OutputObj != EnterLeave->DestObj && NULL != EnterLeave->OutputObj)
 118     {
 119     if (! EnterLeave->ReadOnly)
 120       {
 121       SrcPoint.x = 0;
 122       SrcPoint.y = 0;
 123       Result = EnterLeave->DestGDI->CopyBits(EnterLeave->DestObj,
 124                                              EnterLeave->OutputObj,
 125                                              EnterLeave->TrivialClipObj, NULL,
 126                                              &EnterLeave->DestRect, &SrcPoint);
 127       }
 128     EngFreeMem(EnterLeave->OutputObj->pvBits);
 129     EngDeleteSurface(EnterLeave->OutputBitmap);
 130     EngDeleteClip(EnterLeave->TrivialClipObj);
 131     }
 132   else
 133     {
 134     Result = TRUE;
 135     }
 136
 137   return Result;
 138 }
 139 /* EOF */