/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkWin32ImageWindow.cxx
  Language:  C++
  Date:      $Date$
  Version:   $Revision$
  Thanks:    Thanks to Matt Turek who developed this class.

Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/

#include "vtkWin32ImageWindow.h"
#include "vtkObjectFactory.h"


#ifndef VTK_REMOVE_LEGACY_CODE

//--------------------------------------------------------------------------
vtkWin32ImageWindow* vtkWin32ImageWindow::New()
{
  vtkGenericWarningMacro(<<"Obsolete native imaging class: " 
                         <<"use OpenGL version instead");

  // First try to create the object from the vtkObjectFactory
  vtkObject* ret = vtkObjectFactory::CreateInstance("vtkWin32ImageWindow");
  if(ret)
    {
    return (vtkWin32ImageWindow*)ret;
    }
  // If the factory was unable to create the object, then create it here.
  return new vtkWin32ImageWindow;
}





unsigned char *vtkWin32ImageWindow::GetPixelData(int x1, int y1, 
						 int x2, int y2, int)
{

  int width  = (abs(x2 - x1)+1);
  int height = (abs(y2 - y1)+1);
  HDC compatHdc;
  HBITMAP bitmap = (HBITMAP) 0;
  HBITMAP oldBitmap;
  BITMAPINFO dataHeader;
  int dataWidth = ((this->Size[0]*3+3)/4)*4;

  // Define the bitmap header
  dataHeader.bmiHeader.biSize = 40;
  dataHeader.bmiHeader.biWidth = this->Size[0];
  dataHeader.bmiHeader.biHeight = this->Size[1];
  dataHeader.bmiHeader.biPlanes = 1;
  dataHeader.bmiHeader.biBitCount = 24;
  dataHeader.bmiHeader.biCompression = BI_RGB;
  dataHeader.bmiHeader.biSizeImage = dataWidth*this->Size[1];
  dataHeader.bmiHeader.biClrUsed = 0;
  dataHeader.bmiHeader.biClrImportant = 0;
  
  // Create the bitmap
  bitmap = CreateDIBSection(this->DeviceContext, &dataHeader,
                         DIB_RGB_COLORS, (void **)(&(this->DIBPtr)), 
                         NULL, 0);

  // Create a compatible device context
  compatHdc = (HDC) CreateCompatibleDC(this->DeviceContext);

  // Put the bitmap into the device context
  oldBitmap = (HBITMAP) SelectObject(compatHdc, bitmap);

  int y_low = 0;
  int y_hi = 0;
  int x_low = 0;
  int x_hi = 0;

  if (y1 < y2)
    {
    y_low = y1; 
    y_hi  = y2;
    }
  else
    {
    y_low = y2; 
    y_hi  = y1;
    }

  if (x1 < x2)
    {
    x_low = x1; 
    x_hi  = x2;
    }
  else
    {
    x_low = x2; 
    x_hi  = x1;
    }

  // Get the bitmap
  BitBlt(compatHdc, 0, 0, width, height, this->DeviceContext,
	 x_low, y_low, SRCCOPY);

  // Allocate space for the data
  int size = dataWidth*height;
  unsigned char*  data = new unsigned char[size];
  if (!data) 
    {
    vtkErrorMacro(<< "Failed to malloc space for pixel data!");
    return (unsigned char*) NULL;
    }

  GetDIBits(compatHdc, bitmap, 0, height, data, &dataHeader, DIB_RGB_COLORS);
 
  // Data is in BGR format.  Change to RGB. 
  unsigned char*  p_data =  data;
  unsigned char*  p_data2 = data;
  unsigned char rbyte;
  unsigned char gbyte;
  unsigned char bbyte;

  int rowAdder;
  rowAdder = (4 - (width*3)%4)%4;
  for (int i = 0; i < height; i++)
    {
    for (int j = 0; j < width; j++)
      {
	bbyte = *p_data++;
	gbyte = *p_data++;
	rbyte = *p_data++;
	*p_data2++ = rbyte;
	*p_data2++ = gbyte;
	*p_data2++ = bbyte;
      }

    // rows must be a multiple of four bytes
    // so pad it if neccessary
    p_data += rowAdder;
    }

  // Free the device context
  SelectObject(compatHdc, oldBitmap);
  DeleteDC(compatHdc);
  
  return data;

}


//---------------------------------------------------------------------------
unsigned char *vtkWin32ImageWindow::GetDIBPtr()
{
  return this->DIBPtr;
}

//---------------------------------------------------------------------------
// Win32 version does not handle double buffering
void vtkWin32ImageWindow::SwapBuffers()
{
}

// Win32 version does not handle double buffering
void vtkWin32ImageWindow::Frame()
{
}


//----------------------------------------------------------------------------
vtkWin32ImageWindow::vtkWin32ImageWindow()
{
  this->ApplicationInstance = NULL;
  this->Palette = NULL;
  this->WindowId = 0;
  this->ParentId = 0;
  this->DeviceContext = (HDC)0;
  this->OwnWindow = 0;

  this->SetWindowName("Visualization Toolkit - ImageWin32");
  this->DIBPtr = (unsigned char*) NULL;

  this->SwapFlag = 0;
  this->BackBuffer= (HBITMAP) 0;
}


//----------------------------------------------------------------------------
vtkWin32ImageWindow::~vtkWin32ImageWindow()
{
  if (this->WindowId && this->OwnWindow)
    {
    DestroyWindow(this->WindowId);
    // mark the window as being removed...
    SetWindowLong(this->WindowId,GWL_USERDATA,(LONG)0);
    }
}


//----------------------------------------------------------------------------
void vtkWin32ImageWindow::PrintSelf(ostream& os, vtkIndent indent)
{
  vtkImageWindow::PrintSelf(os, indent);
}

// Get the position in screen coordinates of the window.
int *vtkWin32ImageWindow::GetPosition(void)
{

  vtkDebugMacro (<< "vtkWin32ImageWindow::GetPosition");

  // if we aren't mapped then just return the ivar 
  if (!this->Mapped)
    {
    return(this->Position);
    }

  //#### We need to fix this!!!!
  return this->Position;
}


void vtkWin32ImageWindow::SetBackgroundColor(float r, float g, float b)
{

  vtkDebugMacro(<<"vtkWin32ImageWindow::SetBackgroundColor");

  BYTE red = r * 255.0;
  BYTE green = g * 255.0;
  BYTE blue = b * 255.0;

  COLORREF value = SetBkColor(this->DeviceContext, RGB(red, green, blue));

  if (value == CLR_INVALID)  
    vtkDebugMacro(<<"vtkWin32ImageWindow::SetBackgroundColor - operation failed");

}

void vtkWin32ImageWindow::EraseWindow()
{

  vtkDebugMacro(<<"vtkWin32ImageWindow::EraseWindow");

  int* size = this->GetSize();

  RECT rectSize;
  rectSize.top = 0;
  rectSize.left = 0;
  rectSize.right = size[0] - 1;
  rectSize.bottom = size[1] - 1;

  COLORREF backColor = GetBkColor(this->DeviceContext);	

  if (backColor == CLR_INVALID)
    {
    vtkErrorMacro(<<"vtkWin32ImageWindow::EraseWindow - Invalid background color");
    backColor = RGB(0,0,0);  // black
    }

  if (GetBkMode(this->DeviceContext) == OPAQUE)
    {
    vtkDebugMacro(<<"vtkWin32ImageWindow::EraseWindow - Background is opaque");
    }
  else
    {
    vtkDebugMacro(<<"vtkWin32ImageWindow::EraseWindow - Background is transparent");
    }
      
  HBRUSH hBrush = CreateSolidBrush(backColor);

  FillRect(this->DeviceContext, &rectSize, hBrush);

}


void vtkWin32ImageWindow::SetPosition(int x, int y)
{
  static int resizing = 0;

  vtkDebugMacro (<< "vtkWin32ImageWindow::SetPosition: " << x << "," << y);

  if ((this->Position[0] != x) || (this->Position[1] != y))
    {
    this->Modified();
    this->Position[0] = x;
    this->Position[1] = y;
    if (this->Mapped)
      {
      if (!resizing)
        {
        resizing = 1;
   
        SetWindowPos(this->WindowId,HWND_TOP,x,y,
		     0, 0, SWP_NOSIZE | SWP_NOZORDER);
        resizing = 0;
        }
      }
    }
}


void vtkWin32ImageWindow::SetSize(int x, int y)
{
  static int resizing = 0;

  // vtkDebugMacro (<< "vtkWin32ImageWindow::SetSize: " << x << "," << y);

  if ((this->Size[0] != x) || (this->Size[1] != y))
    {
    
    this->Modified();
    this->Size[0] = x;
    this->Size[1] = y;
    if (this->Mapped)
      {
      if (!resizing)
        {
        resizing = 1;

        if (this->ParentId)
          {
          SetWindowPos(this->WindowId,HWND_TOP,0,0,
		       x, y, SWP_NOMOVE | SWP_NOZORDER);
          }
        else
          {
          SetWindowPos(this->WindowId,HWND_TOP,0,0,
		       x+2*GetSystemMetrics(SM_CXFRAME),
		       y+2*GetSystemMetrics(SM_CYFRAME)
		       + GetSystemMetrics(SM_CYCAPTION),
		       SWP_NOMOVE | SWP_NOZORDER);
          }


        resizing = 0;
        }
      }
    }
}

// Get the current size of the window.
int *vtkWin32ImageWindow::GetSize(void)
{
  RECT rect;

  // vtkDebugMacro (<< "vtkWin32ImageWindow::GetSize");

  // if we aren't mapped then just return the ivar 
  if (!this->Mapped)
    {
    return(this->Size);
    }

  //  Find the current window size 
  GetClientRect(this->WindowId, &rect);

  this->Size[0] = rect.right;
  this->Size[1] = rect.bottom;
  
  return this->Size;
}

void vtkWin32ImageWindowSetupRGBPixelFormat(HDC hDC)
{
  PIXELFORMATDESCRIPTOR pfd = {
    sizeof(PIXELFORMATDESCRIPTOR),  /* size */
    1,                              /* version */
    PFD_DRAW_TO_WINDOW,
    PFD_TYPE_RGBA,                   /* color type */
    24,                             /* prefered color depth */
    0, 0, 0, 0, 0, 0,               /* color bits (ignored) */
    0,                              /* no alpha buffer */
    0,                              /* alpha bits (ignored) */
    0,                              /* no accumulation buffer */
    0, 0, 0, 0,                     /* accum bits (ignored) */
    0,                              /* depth buffer */
    0,                              /* no stencil buffer */
    0,                              /* no auxiliary buffers */
    PFD_MAIN_PLANE,                 /* main layer */
    0,                              /* reserved */
    0, 0, 0,                        /* no layer, visible, damage masks */
  };
  int pixelFormat;

  pixelFormat = ChoosePixelFormat(hDC, &pfd);
  if (pixelFormat == 0) {
  MessageBox(WindowFromDC(hDC), "ChoosePixelFormat failed.", "Error",
	     MB_ICONERROR | MB_OK);
  exit(1);
  }

  if (SetPixelFormat(hDC, pixelFormat, &pfd) != TRUE) {
  MessageBox(WindowFromDC(hDC), "SetPixelFormat failed.", "Error",
	     MB_ICONERROR | MB_OK);
  exit(1);
  }
}

void vtkWin32ImageWindowSetupGrayPixelFormat(HDC hDC)
{
  PIXELFORMATDESCRIPTOR pfd = {
    sizeof(PIXELFORMATDESCRIPTOR),  /* size */
    1,                              /* version */
    PFD_DRAW_TO_WINDOW,
    PFD_TYPE_COLORINDEX,            /* color type */
    8,                              /* prefered color depth */
    0, 0, 0, 0, 0, 0,               /* color bits (ignored) */
    0,                              /* no alpha buffer */
    0,                              /* alpha bits (ignored) */
    0,                              /* no accumulation buffer */
    0, 0, 0, 0,                     /* accum bits (ignored) */
    0,                              /* depth buffer */
    0,                              /* no stencil buffer */
    0,                              /* no auxiliary buffers */
    PFD_MAIN_PLANE,                 /* main layer */
    0,                              /* reserved */
    0, 0, 0,                        /* no layer, visible, damage masks */
  };
  int pixelFormat;

  pixelFormat = ChoosePixelFormat(hDC, &pfd);
  if (pixelFormat == 0) {
  MessageBox(WindowFromDC(hDC), "ChoosePixelFormat failed.", "Error",
	     MB_ICONERROR | MB_OK);
  exit(1);
  }

  if (SetPixelFormat(hDC, pixelFormat, &pfd) != TRUE) {
  MessageBox(WindowFromDC(hDC), "SetPixelFormat failed.", "Error",
	     MB_ICONERROR | MB_OK);
  exit(1);
  }
}

// creates and applies a RGB palette
void vtkWin32ImageWindowSetupRGBPalette(HDC hDC, 
					vtkWin32ImageWindow *me)
{
  int pixelFormat = GetPixelFormat(hDC);
  PIXELFORMATDESCRIPTOR pfd;
  LOGPALETTE* pPal;
  int paletteSize;
    
  DescribePixelFormat(hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
  
  if (pfd.dwFlags & PFD_NEED_PALETTE) 
    {
    paletteSize = 1 << pfd.cColorBits;
    } 
  else 
    {
    return;
    }
  
  pPal = (LOGPALETTE*)
    malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
  pPal->palVersion = 0x300;
  pPal->palNumEntries = paletteSize;
  
  /* build a simple RGB color palette */
  {
  int redMask = (1 << pfd.cRedBits) - 1;
  int greenMask = (1 << pfd.cGreenBits) - 1;
  int blueMask = (1 << pfd.cBlueBits) - 1;
  int i;
  
  for (i=0; i<paletteSize; ++i) 
    {
    pPal->palPalEntry[i].peRed =
      (((i >> pfd.cRedShift) & redMask) * 255) / redMask;
    pPal->palPalEntry[i].peGreen =
      (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask;
    pPal->palPalEntry[i].peBlue =
      (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask;
    pPal->palPalEntry[i].peFlags = 0;
    }
  }
  
  me->Palette = CreatePalette(pPal);
  free(pPal);
  
  if (me->Palette) 
    {
    SelectPalette(hDC, me->Palette, FALSE);
    RealizePalette(hDC);
    }

}

void vtkWin32ImageWindowSetupGrayPalette(HDC hDC, 
					 vtkWin32ImageWindow *me)
{
  int pixelFormat = GetPixelFormat(hDC);
  PIXELFORMATDESCRIPTOR pfd;
  LOGPALETTE* pPal;
  int paletteSize;
  
  DescribePixelFormat(hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
  
  // we always want a palette on 8 bit displays
  if (pfd.cColorBits == 8 || pfd.dwFlags & PFD_NEED_PALETTE) 
    {
    paletteSize = 1 << pfd.cColorBits;
    } 
  else 
    {
    return;
    }
  
  pPal = (LOGPALETTE*)
    malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
  pPal->palVersion = 0x300;
  pPal->palNumEntries = paletteSize;
  
  /* build a simple RGB color palette */
  {
  int redMask = (1 << pfd.cRedBits) - 1;
  int greenMask = (1 << pfd.cGreenBits) - 1;
  int blueMask = (1 << pfd.cBlueBits) - 1;
  int i;
  
  for (i=0; i<paletteSize; ++i) 
    {
    pPal->palPalEntry[i].peRed = (255*i)/paletteSize;
    pPal->palPalEntry[i].peGreen = (255*i)/paletteSize;
    pPal->palPalEntry[i].peBlue = (255*i)/paletteSize;
    pPal->palPalEntry[i].peFlags = 0;
    }
  }
  
  me->Palette = CreatePalette(pPal);
  free(pPal);
  
  if (me->Palette) 
    {
    SelectPalette(hDC, me->Palette, FALSE);
    RealizePalette(hDC);
    }
}

// used to pass info into the create routine because there doesn't
// seem to be another way. Could be a problem for multithreaded
// apps but this is unlikely since this doesn't get called very
// often at all.
vtkWin32ImageWindow *vtkWin32ImageWindowPtr = NULL;

LRESULT APIENTRY vtkWin32ImageWindowWndProc(HWND hWnd, UINT message, 
					    WPARAM wParam, LPARAM lParam)
{
  vtkWin32ImageWindow *me =   
    (vtkWin32ImageWindow *)GetWindowLong(hWnd,GWL_USERDATA);

  // if we have entered this event proc for a window that has already
  // been destroyed, do nothing.
  if (!me && (message != WM_CREATE))
    {
    return DefWindowProc(hWnd, message, wParam, lParam);
    }
  
  switch (message) 
    {
    case WM_CREATE:
      {
      me = vtkWin32ImageWindowPtr;
      SetWindowLong(hWnd,GWL_USERDATA,(LONG)me);
      me->DeviceContext = (HDC) GetDC(hWnd);
      // #### 7/29/97 mwt
      SetMapMode (me->DeviceContext, MM_TEXT);
      // #### 8/13/97 mwt
      //SetBkColor (me->DeviceContext, RGB(me->Background[0], me->Background[1], me->Background[2]));
      SetBkColor (me->DeviceContext, RGB(0,0,0));
      if (me->GetGrayScaleHint())
	{
	vtkWin32ImageWindowSetupGrayPixelFormat(me->DeviceContext);
	vtkWin32ImageWindowSetupGrayPalette(me->DeviceContext,me);
	}
      else
	{
	vtkWin32ImageWindowSetupRGBPixelFormat(me->DeviceContext);
	vtkWin32ImageWindowSetupRGBPalette(me->DeviceContext,me);
	}
      return 0;
      }
    case WM_DESTROY:
      if (me->Palette)
	{
	DeleteObject(me->Palette);
	me->Palette = NULL;
	}
      ReleaseDC(me->WindowId, me->DeviceContext);
      return 0;
    case WM_SIZE:
      /* track window size changes */
      if (me->DeviceContext) 
	{
	me->SetSize((int) LOWORD(lParam),(int) HIWORD(lParam));
	return 0;
	}
    case WM_PALETTECHANGED:
      /* realize palette if this is *not* the current window */
      if (me->DeviceContext && me->Palette && (HWND) wParam != hWnd) 
	{
	UnrealizeObject(me->Palette);
	SelectPalette(me->DeviceContext, me->Palette, FALSE);
	RealizePalette(me->DeviceContext);
	me->Render();
	break;
	}
      break;
    case WM_QUERYNEWPALETTE:
      /* realize palette if this is the current window */
      if (me->DeviceContext && me->Palette) 
	{
	UnrealizeObject(me->Palette);
	SelectPalette(me->DeviceContext, me->Palette, FALSE);
	RealizePalette(me->DeviceContext);
	me->Render();
	return TRUE;
	}
      break;
    case WM_PAINT:
      {
      PAINTSTRUCT ps;
      BeginPaint(hWnd, &ps);
      if (me->DeviceContext) 
	{
	me->Render();
	}
      EndPaint(hWnd, &ps);
      return 0;
      }
      break;
    default:
      break;
    }
  return DefWindowProc(hWnd, message, wParam, lParam);
}


//----------------------------------------------------------------------------
void vtkWin32ImageWindow::MakeDefaultWindow() 
{
  // start count at 1 so window names start at 1 and string length calculation
  // avoids log10(1)
  static int count = 1;

  vtkDebugMacro (<< "vtkWin32ImageWindow::MakeDefaultWindow");

  // get the applicaiton instance if we don't have one already
  if (!this->ApplicationInstance)
    {
    // if we have a parent window get the app instance from it
    if (this->ParentId)
      {
      this->ApplicationInstance = 
	(HINSTANCE)GetWindowLong(this->ParentId,GWL_HINSTANCE);
      }
    else
      {
      this->ApplicationInstance = GetModuleHandle(NULL);
      }
    }
  if (!this->WindowId)
    {
    WNDCLASS wndClass;

    int len = strlen( "Visualization Toolkit - ImageWin32 #") 
      + (int)ceil( (double) log10( (double)(count+1) ) ) + 1; 
    char* tempName = new char [len];
    sprintf(tempName,"Visualization Toolkit - ImageWin32 #%i",count++);
    this->SetWindowName(tempName);

    // has the class been registered ?
    if (!GetClassInfo(this->ApplicationInstance,"vtkImage",&wndClass))
        {
        wndClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
        wndClass.lpfnWndProc = vtkWin32ImageWindowWndProc;
        wndClass.cbClsExtra = 0;
        wndClass.cbWndExtra = 0;
        wndClass.hInstance = this->ApplicationInstance;
        wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
        wndClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
        wndClass.lpszMenuName = NULL;
        wndClass.lpszClassName = "vtkImage";
        RegisterClass(&wndClass);
        }
    
    // if size not set use default of 256
    if (this->Size[0] == 0) 
      {
      this->Size[0] = 256;
      this->Size[1] = 256;
      }
	
    /* create window */
    // use poor mans mutex
    if (vtkWin32ImageWindowPtr)
      {
      vtkErrorMacro("Two windows being created at the same time");
      }
    vtkWin32ImageWindowPtr = this;
    if (this->ParentId)
      {
      this->WindowId = 
	CreateWindow("vtkImage", this->WindowName,
		     WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
		     0, 0, this->Size[0], this->Size[1],
		     this->ParentId, NULL, this->ApplicationInstance, NULL);
      }
    else
      {
      this->WindowId = 
	CreateWindow("vtkImage", this->WindowName,
		     WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
		     0, 0, this->Size[0]+2*GetSystemMetrics(SM_CXFRAME),
		     this->Size[1] + 2*GetSystemMetrics(SM_CYFRAME) + 
		     GetSystemMetrics(SM_CYCAPTION),
		     NULL, NULL, this->ApplicationInstance, NULL);
      }
    vtkWin32ImageWindowPtr = NULL;
    if (!this->WindowId)
      {
      vtkErrorMacro("Could not create window, error:  " << GetLastError());
      return;
      }
    
    /* display window */
    this->WindowCreated = 1;
    this->OwnWindow = 1;

    ShowWindow(this->WindowId, SW_SHOW);
    }
  // window id was set
  else
    {
    SetWindowLong(this->WindowId,GWL_USERDATA,(LONG)this);
    this->DeviceContext = (HDC)GetDC(this->WindowId);
    SetBkColor (this->DeviceContext, RGB(0,0,0));
    if (this->GetGrayScaleHint())
      {
      vtkWin32ImageWindowSetupGrayPixelFormat(this->DeviceContext);
      vtkWin32ImageWindowSetupGrayPalette(this->DeviceContext,this);
      }
    else
      {
      vtkWin32ImageWindowSetupRGBPixelFormat(this->DeviceContext);
      vtkWin32ImageWindowSetupRGBPalette(this->DeviceContext,this);
      }
    }
  
  this->Mapped = 1;
}

// Get the window id.
HWND vtkWin32ImageWindow::GetWindowId()
{
  vtkDebugMacro(<< "vtkWin32ImageWindow::GetWindowId - Returning WindowId of " << this->WindowId << "\n"); 

  return this->WindowId;
}

// Set the window id to a pre-existing window.
void vtkWin32ImageWindow::SetWindowId(HWND arg)
{
  vtkDebugMacro(<< "vtkWin32ImageWindow::SetWindowID - Setting WindowId to " << arg << "\n"); 

  this->WindowId = arg;
}

// Set the window id to a pre-existing window.
void vtkWin32ImageWindow::SetParentId(HWND arg)
{
  vtkDebugMacro(<< "vtkWin32ImageWindow::SetParentID - Setting ParentId to " << arg << "\n"); 

  this->ParentId = arg;
}


void vtkWin32ImageWindow::SetupMemoryRendering(int xsize, int ysize,HDC aHdc)
{
  int dataWidth = ((xsize*3+3)/4)*4;
  
  this->MemoryDataHeader.bmiHeader.biSize = 40;
  this->MemoryDataHeader.bmiHeader.biWidth = xsize;
  this->MemoryDataHeader.bmiHeader.biHeight = ysize;
  this->MemoryDataHeader.bmiHeader.biPlanes = 1;
  this->MemoryDataHeader.bmiHeader.biBitCount = 24;
  this->MemoryDataHeader.bmiHeader.biCompression = BI_RGB;
  this->MemoryDataHeader.bmiHeader.biClrUsed = 0;
  this->MemoryDataHeader.bmiHeader.biClrImportant = 0;
  this->MemoryDataHeader.bmiHeader.biSizeImage = dataWidth*ysize;
	
  // try using a DIBsection
  this->MemoryBuffer = CreateDIBSection(aHdc,
				&this->MemoryDataHeader, DIB_RGB_COLORS, 
				(void **)(&(this->MemoryData)),  NULL, 0);
  
  // Create a compatible device context
  this->MemoryHdc = (HDC)CreateCompatibleDC(aHdc);
  int cxPage = GetDeviceCaps(aHdc,LOGPIXELSX);
  int mxPage = GetDeviceCaps(this->MemoryHdc,LOGPIXELSX);
  
  // Put the bitmap into the device context
  SelectObject(this->MemoryHdc, this->MemoryBuffer);
  
  // save the current state
  this->ScreenMapped = this->Mapped;
  this->ScreenWindowSize[0] = this->Size[0];
  this->ScreenWindowSize[1] = this->Size[1];
  this->ScreenDeviceContext = this->DeviceContext;
  
  // adjust settings for renderwindow
  this->Mapped =0;
  this->Size[0] = xsize;
  this->Size[1] = ysize;
  
  this->DeviceContext = this->MemoryHdc;
  vtkWin32ImageWindowSetupRGBPixelFormat(this->DeviceContext);
  vtkWin32ImageWindowSetupRGBPalette(this->DeviceContext,this);
}

HDC vtkWin32ImageWindow::GetMemoryDC()
{
  return this->MemoryHdc;
}

void vtkWin32ImageWindow::ResumeScreenRendering()
{
  GdiFlush();
  DeleteDC(this->MemoryHdc); 
  DeleteObject(this->MemoryBuffer);
  
  this->Mapped = this->ScreenMapped;
  this->Size[0] = this->ScreenWindowSize[0];
  this->Size[1] = this->ScreenWindowSize[1];
  this->DeviceContext = this->ScreenDeviceContext;
}
#endif
