src/msw/bitmap.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        bitmap.cpp
// Purpose:     wxBitmap
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "bitmap.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include <stdio.h>
#include "wx/setup.h"
#include "wx/list.h"
#include "wx/utils.h"
#include "wx/app.h"
#include "wx/palette.h"
#include "wx/dcmemory.h"
#include "wx/bitmap.h"
#include "wx/icon.h"
#endif

#include "wx/msw/private.h"
#include "wx/log.h"

#include "assert.h"

#include "wx/msw/dib.h"

#if !USE_SHARED_LIBRARIES
IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
#endif

wxBitmapRefData::wxBitmapRefData(void)
{
  m_ok = FALSE;
  m_width = 0;
  m_height = 0;
  m_depth = 0;
  m_quality = 0;
  m_hBitmap = 0 ;
  m_selectedInto = NULL;
  m_numColors = 0;
  m_bitmapMask = NULL;
}

wxBitmapRefData::~wxBitmapRefData(void)
{
  if (m_selectedInto)
  {
    wxChar buf[200];
    wxSprintf(buf, _T("Bitmap was deleted without selecting out of wxMemoryDC %X."), (unsigned int) m_selectedInto);
    wxFatalError(buf);
  }
  if (m_hBitmap)
  {
    DeleteObject((HBITMAP) m_hBitmap);
  }
  m_hBitmap = 0 ;

  if (m_bitmapMask)
    delete m_bitmapMask;
  m_bitmapMask = NULL;

}

wxList wxBitmap::sm_handlers;

wxBitmap::wxBitmap(void)
{
  if ( wxTheBitmapList )
    wxTheBitmapList->AddBitmap(this);
}

wxBitmap::~wxBitmap(void)
{
    if (wxTheBitmapList)
        wxTheBitmapList->DeleteObject(this);
}

bool wxBitmap::FreeResource(bool WXUNUSED(force))
{
  if ( !M_BITMAPDATA )
  return FALSE;

  if (M_BITMAPDATA->m_selectedInto)
  {
    wxChar buf[200];
    wxSprintf(buf, _T("Bitmap %X was deleted without selecting out of wxMemoryDC %X."), (unsigned int) this, (unsigned int) M_BITMAPDATA->m_selectedInto);
    wxFatalError(buf);
  }
  if (M_BITMAPDATA->m_hBitmap)
  {
    DeleteObject((HBITMAP) M_BITMAPDATA->m_hBitmap);
  }
  M_BITMAPDATA->m_hBitmap = 0 ;

/*
  if (M_BITMAPDATA->m_bitmapPalette)
    delete M_BITMAPDATA->m_bitmapPalette;

  M_BITMAPDATA->m_bitmapPalette = NULL ;
*/

  return TRUE;
}


wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
{
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_width = the_width ;
  M_BITMAPDATA->m_height = the_height ;
  M_BITMAPDATA->m_depth = no_bits ;
  M_BITMAPDATA->m_numColors = 0;

  M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateBitmap(the_width, the_height, 1, no_bits, bits);

  if (M_BITMAPDATA->m_hBitmap)
    M_BITMAPDATA->m_ok = TRUE;
  else
    M_BITMAPDATA->m_ok = FALSE;

  M_BITMAPDATA->m_selectedInto = NULL;

  if ( wxTheBitmapList )
    wxTheBitmapList->AddBitmap(this);
}

// Create from XPM data
wxBitmap::wxBitmap(char **data, wxControl *WXUNUSED(anItem))
{
  (void) Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
}

wxBitmap::wxBitmap(int w, int h, int d)
{
  (void)Create(w, h, d);

  if ( wxTheBitmapList )
    wxTheBitmapList->AddBitmap(this);
}

wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
{
  (void) Create(data, type, width, height, depth);

  if ( wxTheBitmapList )
    wxTheBitmapList->AddBitmap(this);
}

wxBitmap::wxBitmap(const wxString& filename, long type)
{
  LoadFile(filename, (int)type);

  if ( wxTheBitmapList )
    wxTheBitmapList->AddBitmap(this);
}

bool wxBitmap::Create(int w, int h, int d)
{
  UnRef();

  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_width = w;
  M_BITMAPDATA->m_height = h;
  M_BITMAPDATA->m_depth = d;

  if (d > 0)
  {
    M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateBitmap(w, h, 1, d, NULL);
  }
  else
  {
    HDC dc = GetDC((HWND) NULL);
    M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateCompatibleBitmap(dc, w, h);
    ReleaseDC((HWND) NULL, dc);
    M_BITMAPDATA->m_depth = wxDisplayDepth();
  }
  if (M_BITMAPDATA->m_hBitmap)
    M_BITMAPDATA->m_ok = TRUE;
  else
    M_BITMAPDATA->m_ok = FALSE;
  return M_BITMAPDATA->m_ok;
}

bool wxBitmap::LoadFile(const wxString& filename, long type)
{
  UnRef();

  m_refData = new wxBitmapRefData;

  wxBitmapHandler *handler = FindHandler(type);

  if ( handler == NULL ) {
    wxLogWarning(_T("no bitmap handler for type %d defined."), type);

    return FALSE;
  }

  return handler->LoadFile(this, filename, type, -1, -1);
}

bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
{
  UnRef();

  m_refData = new wxBitmapRefData;

  wxBitmapHandler *handler = FindHandler(type);

  if ( handler == NULL ) {
    wxLogWarning(_T("no bitmap handler for type %d defined."), type);

    return FALSE;
  }

  return handler->Create(this, data, type, width, height, depth);
}

bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette)
{
  wxBitmapHandler *handler = FindHandler(type);

  if ( handler == NULL ) {
    wxLogWarning(_T("no bitmap handler for type %d defined."), type);

    return FALSE;
  }

  return handler->SaveFile(this, filename, type, palette);
}

void wxBitmap::SetWidth(int w)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_width = w;
}

void wxBitmap::SetHeight(int h)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_height = h;
}

void wxBitmap::SetDepth(int d)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_depth = d;
}

void wxBitmap::SetQuality(int q)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_quality = q;
}

void wxBitmap::SetOk(bool isOk)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_ok = isOk;
}

void wxBitmap::SetPalette(const wxPalette& palette)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_bitmapPalette = palette ;
}

void wxBitmap::SetMask(wxMask *mask)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_bitmapMask = mask ;
}

void wxBitmap::SetHBITMAP(WXHBITMAP bmp)
{
  if (!M_BITMAPDATA)
  m_refData = new wxBitmapRefData;

  M_BITMAPDATA->m_hBitmap = bmp;
}

void wxBitmap::AddHandler(wxBitmapHandler *handler)
{
  sm_handlers.Append(handler);
}

void wxBitmap::InsertHandler(wxBitmapHandler *handler)
{
  sm_handlers.Insert(handler);
}

bool wxBitmap::RemoveHandler(const wxString& name)
{
  wxBitmapHandler *handler = FindHandler(name);
  if ( handler )
  {
    sm_handlers.DeleteObject(handler);
    return TRUE;
  }
  else
    return FALSE;
}

wxBitmapHandler *wxBitmap::FindHandler(const wxString& name)
{
  wxNode *node = sm_handlers.First();
  while ( node )
  {
    wxBitmapHandler *handler = (wxBitmapHandler *)node->Data();
    if ( (handler->GetName().Cmp(name) == 0) )
      return handler;
    node = node->Next();
  }
  return NULL;
}

wxBitmapHandler *wxBitmap::FindHandler(const wxString& extension, long bitmapType)
{
  wxNode *node = sm_handlers.First();
  while ( node )
  {
    wxBitmapHandler *handler = (wxBitmapHandler *)node->Data();
    if ( (handler->GetExtension().Cmp(extension) == 0) &&
          (bitmapType == -1 || (handler->GetType() == bitmapType)) )
      return handler;
    node = node->Next();
  }
  return NULL;
}

wxBitmapHandler *wxBitmap::FindHandler(long bitmapType)
{
  wxNode *node = sm_handlers.First();
  while ( node )
  {
    wxBitmapHandler *handler = (wxBitmapHandler *)node->Data();
    if (handler->GetType() == bitmapType)
      return handler;
    node = node->Next();
  }
  return NULL;
}

// New Create/FreeDIB functions since ones in dibutils.cpp are confusing
static long createDIB(long xSize, long ySize, long bitsPerPixel,
                       HPALETTE hPal, LPBITMAPINFO* lpDIBHeader);
static long freeDIB(LPBITMAPINFO lpDIBHeader);

// Creates a bitmap that matches the device context, from
// an arbitray bitmap. At present, the original bitmap must have an
// associated palette. TODO: use a default palette if no palette exists.
// Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
{
    wxMemoryDC      memDC;
    wxBitmap        tmpBitmap(this->GetWidth(), this->GetHeight(), dc.GetDepth());
    HPALETTE        hPal = (HPALETTE) NULL;
    LPBITMAPINFO    lpDib;
    void            *lpBits = (void*) NULL;

/*
    wxASSERT( this->GetPalette() && this->GetPalette()->Ok() && (this->GetPalette()->GetHPALETTE() != 0) );

    tmpBitmap.SetPalette(this->GetPalette());
    memDC.SelectObject(tmpBitmap);
    memDC.SetPalette(this->GetPalette());

    hPal = (HPALETTE) this->GetPalette()->GetHPALETTE();
*/
    if( this->GetPalette() && this->GetPalette()->Ok() && (this->GetPalette()->GetHPALETTE() != 0) )
    {
        tmpBitmap.SetPalette(* this->GetPalette());
        memDC.SelectObject(tmpBitmap);
        memDC.SetPalette(* this->GetPalette());
        hPal = (HPALETTE) this->GetPalette()->GetHPALETTE();
    }
    else
    {
        hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
        wxPalette palette;
        palette.SetHPALETTE( (WXHPALETTE)hPal );
        tmpBitmap.SetPalette( palette );
        memDC.SelectObject(tmpBitmap);
        memDC.SetPalette( palette );
    }

    // set the height negative because in a DIB the order of the lines is reversed
    createDIB(this->GetWidth(), -this->GetHeight(), this->GetDepth(), hPal, &lpDib);

    lpBits = malloc(lpDib->bmiHeader.biSizeImage);

    ::GetBitmapBits((HBITMAP)GetHBITMAP(), lpDib->bmiHeader.biSizeImage, lpBits);

    ::SetDIBitsToDevice((HDC) memDC.GetHDC(), 0, 0, this->GetWidth(), this->GetHeight(),
                        0, 0, 0, this->GetHeight(), lpBits, lpDib, DIB_RGB_COLORS);

    free(lpBits);

    freeDIB(lpDib);
    return (tmpBitmap);
}

/*
 * wxMask
 */

wxMask::wxMask(void)
{
    m_maskBitmap = 0;
}

// Construct a mask from a bitmap and a colour indicating
// the transparent area
wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
{
    m_maskBitmap = 0;
  Create(bitmap, colour);
}

// Construct a mask from a bitmap and a palette index indicating
// the transparent area
wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
{
    m_maskBitmap = 0;
  Create(bitmap, paletteIndex);
}

// Construct a mask from a mono bitmap (copies the bitmap).
wxMask::wxMask(const wxBitmap& bitmap)
{
    m_maskBitmap = 0;
  Create(bitmap);
}

wxMask::~wxMask(void)
{
    if ( m_maskBitmap )
        ::DeleteObject((HBITMAP) m_maskBitmap);
}

// Create a mask from a mono bitmap (copies the bitmap).
bool wxMask::Create(const wxBitmap& bitmap)
{
    if ( m_maskBitmap )
  {
    ::DeleteObject((HBITMAP) m_maskBitmap);
    m_maskBitmap = 0;
  }
  if (!bitmap.Ok() || bitmap.GetDepth() != 1)
  {
    return FALSE;
  }
  m_maskBitmap = (WXHBITMAP) CreateBitmap(
          bitmap.GetWidth(),
          bitmap.GetHeight(),
          1, 1, 0
          );
  HDC srcDC = CreateCompatibleDC(0);
  SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
  HDC destDC = CreateCompatibleDC(0);
  SelectObject(destDC, (HBITMAP) m_maskBitmap);
  BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
  SelectObject(srcDC, 0);
  DeleteDC(srcDC);
  SelectObject(destDC, 0);
  DeleteDC(destDC);
  return TRUE;
}

// Create a mask from a bitmap and a palette index indicating
// the transparent area
bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
{
    if ( m_maskBitmap )
  {
    ::DeleteObject((HBITMAP) m_maskBitmap);
    m_maskBitmap = 0;
  }
  if (bitmap.Ok() && bitmap.GetPalette()->Ok())
  {
    unsigned char red, green, blue;
    if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
    {
      wxColour transparentColour(red, green, blue);
      return Create(bitmap, transparentColour);
    }
  }
  return FALSE;
}

// Create a mask from a bitmap and a colour indicating
// the transparent area
bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
{
    if ( m_maskBitmap )
  {
    ::DeleteObject((HBITMAP) m_maskBitmap);
    m_maskBitmap = 0;
  }
  if (!bitmap.Ok())
  {
    return FALSE;
  }

  // scan the bitmap for the transparent colour and set
  // the corresponding pixels in the mask to BLACK and
  // the rest to WHITE
  COLORREF maskColour = RGB(colour.Red(), colour.Green(), colour.Blue());
  m_maskBitmap = (WXHBITMAP) ::CreateBitmap(
          bitmap.GetWidth(),
          bitmap.GetHeight(),
          1, 1, 0
          );
  HDC srcDC = ::CreateCompatibleDC(0);
  ::SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
  HDC destDC = ::CreateCompatibleDC(0);
  ::SelectObject(destDC, (HBITMAP) m_maskBitmap);

  // this is not very efficient, but I can't think
  // of a better way of doing it
  for (int w = 0; w < bitmap.GetWidth(); w++)
  {
    for (int h = 0; h < bitmap.GetHeight(); h++)
    {
      COLORREF col = GetPixel(srcDC, w, h);
      if (col == maskColour)
      {
        ::SetPixel(destDC, w, h, RGB(0, 0, 0));
      }
      else
      {
        ::SetPixel(destDC, w, h, RGB(255, 255, 255));
      }
    }
  }
  ::SelectObject(srcDC, 0);
  ::DeleteDC(srcDC);
  ::SelectObject(destDC, 0);
  ::DeleteDC(destDC);
  return TRUE;
}

/*
 * wxBitmapHandler
 */

IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)

bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap), void *WXUNUSED(data), long WXUNUSED(type), int WXUNUSED(width), int WXUNUSED(height), int WXUNUSED(depth))
{
  return FALSE;
}

bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name), long WXUNUSED(type),
    int WXUNUSED(desiredWidth), int WXUNUSED(desiredHeight))
{
  return FALSE;
}

bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name), int WXUNUSED(type), const wxPalette *WXUNUSED(palette))
{
  return FALSE;
}

/*
 * Standard handlers
 */

class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
{
  DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
public:
  inline wxBMPResourceHandler(void)
  {
  m_name = "Windows bitmap resource";
  m_extension = "";
  m_type = wxBITMAP_TYPE_BMP_RESOURCE;
  };

  virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
      int desiredWidth, int desiredHeight);
};
IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)

bool wxBMPResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long WXUNUSED(flags),
    int WXUNUSED(desiredWidth), int WXUNUSED(desiredHeight))
{
    // TODO: load colourmap.
    M_BITMAPHANDLERDATA->m_hBitmap = (WXHBITMAP) ::LoadBitmap(wxGetInstance(), name);
    if (M_BITMAPHANDLERDATA->m_hBitmap)
    {
        M_BITMAPHANDLERDATA->m_ok = TRUE;
        BITMAP bm;
        GetObject((HBITMAP) M_BITMAPHANDLERDATA->m_hBitmap, sizeof(BITMAP), (LPSTR) &bm);
        M_BITMAPHANDLERDATA->m_width = bm.bmWidth;
        M_BITMAPHANDLERDATA->m_height = bm.bmHeight;
        M_BITMAPHANDLERDATA->m_depth = bm.bmBitsPixel;

        if ( bitmap->IsKindOf(CLASSINFO(wxIcon)) )
        {
        }

        return TRUE;
    }

  // it's probably not found
  wxLogError(_T("Can't load bitmap '%s' from resources! Check .rc file."), name.c_str());

  return FALSE;
}

class WXDLLEXPORT wxBMPFileHandler: public wxBitmapHandler
{
  DECLARE_DYNAMIC_CLASS(wxBMPFileHandler)
public:
  inline wxBMPFileHandler(void)
  {
  m_name = "Windows bitmap file";
  m_extension = "bmp";
  m_type = wxBITMAP_TYPE_BMP;
  };

  virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
      int desiredWidth, int desiredHeight);
  virtual bool SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette = NULL);
};
IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler)

bool wxBMPFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long WXUNUSED(flags),
    int WXUNUSED(desiredWidth), int WXUNUSED(desiredHeight))
{
#if wxUSE_IMAGE_LOADING_IN_MSW
    wxPalette *palette = NULL;
    bool success = FALSE;
/*
    if (type & wxBITMAP_DISCARD_COLOURMAP)
      success = wxLoadIntoBitmap(WXSTRINGCAST name, bitmap);
    else
*/
    success = (wxLoadIntoBitmap(WXSTRINGCAST name, bitmap, &palette) != 0);
    if (!success && palette)
    {
      delete palette;
      palette = NULL;
    }
    if (palette)
    {
        M_BITMAPHANDLERDATA->m_bitmapPalette = *palette;
        delete palette;
    }
    return success;
#else
  return FALSE;
#endif
}

bool wxBMPFileHandler::SaveFile(wxBitmap *bitmap, const wxString& name, int WXUNUSED(type), const wxPalette *pal)
{
#if wxUSE_IMAGE_LOADING_IN_MSW
    wxPalette *actualPalette = (wxPalette *)pal;
    if (!actualPalette && (!M_BITMAPHANDLERDATA->m_bitmapPalette.IsNull()))
      actualPalette = & (M_BITMAPHANDLERDATA->m_bitmapPalette);
    return (wxSaveBitmap(WXSTRINGCAST name, bitmap, actualPalette) != 0);
#else
  return FALSE;
#endif
}

void wxBitmap::CleanUpHandlers(void)
{
  wxNode *node = sm_handlers.First();
  while ( node )
  {
    wxBitmapHandler *handler = (wxBitmapHandler *)node->Data();
    wxNode *next = node->Next();
    delete handler;
    delete node;
    node = next;
  }
}

void wxBitmap::InitStandardHandlers(void)
{
  AddHandler(new wxBMPResourceHandler);
  AddHandler(new wxBMPFileHandler);

  // Not added by default: include xpmhand.h in your app
  // and call these in your wxApp::OnInit.
//  AddHandler(new wxXPMFileHandler);
//  AddHandler(new wxXPMDataHandler);

  AddHandler(new wxICOResourceHandler);
  AddHandler(new wxICOFileHandler);
}

static long createDIB(long xSize, long ySize, long bitsPerPixel,
                       HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
{
   unsigned long   i, headerSize;
   LPBITMAPINFO    lpDIBheader = NULL;
   LPPALETTEENTRY  lpPe = NULL;


   // Allocate space for a DIB header
   headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
   lpDIBheader = (BITMAPINFO *) malloc(headerSize);
   lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));

   GetPaletteEntries(hPal, 0, 256, lpPe);


   memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));


   // Fill in the static parts of the DIB header
   lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
   lpDIBheader->bmiHeader.biWidth = xSize;
   lpDIBheader->bmiHeader.biHeight = ySize;
   lpDIBheader->bmiHeader.biPlanes = 1;

   // this value must be 1, 4, 8 or 24 so PixelDepth can only be
   lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
   lpDIBheader->bmiHeader.biCompression = BI_RGB;
   lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >>
3;
   lpDIBheader->bmiHeader.biClrUsed = 256;


   // Initialize the DIB palette
   for (i = 0; i < 256; i++) {
      lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
      lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
      lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
      lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
   }

   *lpDIBHeader = lpDIBheader;


   return (0);

}


static long freeDIB(LPBITMAPINFO lpDIBHeader)
{

   if (lpDIBHeader != NULL) {
      free(lpDIBHeader);
   }

   return (0);
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: bitmap.cpp
	3	// Purpose: wxBitmap
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 04/01/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart and Markus Holzem
	9	// Licence: wxWindows license
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "bitmap.h"
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#ifdef __BORLANDC__
	20	#pragma hdrstop
	21	#endif
	22
	23	#ifndef WX_PRECOMP
	24	#include <stdio.h>
	25	#include "wx/setup.h"
	26	#include "wx/list.h"
	27	#include "wx/utils.h"
	28	#include "wx/app.h"
	29	#include "wx/palette.h"
	30	#include "wx/dcmemory.h"
	31	#include "wx/bitmap.h"
	32	#include "wx/icon.h"
	33	#endif
	34
	35	#include "wx/msw/private.h"
	36	#include "wx/log.h"
	37
	38	#include "assert.h"
	39
	40	#include "wx/msw/dib.h"
	41
	42	#if !USE_SHARED_LIBRARIES
	43	IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
	44	IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
	45	#endif
	46
	47	wxBitmapRefData::wxBitmapRefData(void)
	48	{
	49	m_ok = FALSE;
	50	m_width = 0;
	51	m_height = 0;
	52	m_depth = 0;
	53	m_quality = 0;
	54	m_hBitmap = 0 ;
	55	m_selectedInto = NULL;
	56	m_numColors = 0;
	57	m_bitmapMask = NULL;
	58	}
	59
	60	wxBitmapRefData::~wxBitmapRefData(void)
	61	{
	62	if (m_selectedInto)
	63	{
	64	wxChar buf[200];
	65	wxSprintf(buf, _T("Bitmap was deleted without selecting out of wxMemoryDC %X."), (unsigned int) m_selectedInto);
	66	wxFatalError(buf);
	67	}
	68	if (m_hBitmap)
	69	{
	70	DeleteObject((HBITMAP) m_hBitmap);
	71	}
	72	m_hBitmap = 0 ;
	73
	74	if (m_bitmapMask)
	75	delete m_bitmapMask;
	76	m_bitmapMask = NULL;
	77
	78	}
	79
	80	wxList wxBitmap::sm_handlers;
	81
	82	wxBitmap::wxBitmap(void)
	83	{
	84	if ( wxTheBitmapList )
	85	wxTheBitmapList->AddBitmap(this);
	86	}
	87
	88	wxBitmap::~wxBitmap(void)
	89	{
	90	if (wxTheBitmapList)
	91	wxTheBitmapList->DeleteObject(this);
	92	}
	93
	94	bool wxBitmap::FreeResource(bool WXUNUSED(force))
	95	{
	96	if ( !M_BITMAPDATA )
	97	return FALSE;
	98
	99	if (M_BITMAPDATA->m_selectedInto)
	100	{
	101	wxChar buf[200];
	102	wxSprintf(buf, _T("Bitmap %X was deleted without selecting out of wxMemoryDC %X."), (unsigned int) this, (unsigned int) M_BITMAPDATA->m_selectedInto);
	103	wxFatalError(buf);
	104	}
	105	if (M_BITMAPDATA->m_hBitmap)
	106	{
	107	DeleteObject((HBITMAP) M_BITMAPDATA->m_hBitmap);
	108	}
	109	M_BITMAPDATA->m_hBitmap = 0 ;
	110
	111	/*
	112	if (M_BITMAPDATA->m_bitmapPalette)
	113	delete M_BITMAPDATA->m_bitmapPalette;
	114
	115	M_BITMAPDATA->m_bitmapPalette = NULL ;
	116	*/
	117
	118	return TRUE;
	119	}
	120
	121
	122	wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
	123	{
	124	m_refData = new wxBitmapRefData;
	125
	126	M_BITMAPDATA->m_width = the_width ;
	127	M_BITMAPDATA->m_height = the_height ;
	128	M_BITMAPDATA->m_depth = no_bits ;
	129	M_BITMAPDATA->m_numColors = 0;
	130
	131	M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateBitmap(the_width, the_height, 1, no_bits, bits);
	132
	133	if (M_BITMAPDATA->m_hBitmap)
	134	M_BITMAPDATA->m_ok = TRUE;
	135	else
	136	M_BITMAPDATA->m_ok = FALSE;
	137
	138	M_BITMAPDATA->m_selectedInto = NULL;
	139
	140	if ( wxTheBitmapList )
	141	wxTheBitmapList->AddBitmap(this);
	142	}
	143
	144	// Create from XPM data
	145	wxBitmap::wxBitmap(char *data, wxControl WXUNUSED(anItem))
	146	{
	147	(void) Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
	148	}
	149
	150	wxBitmap::wxBitmap(int w, int h, int d)
	151	{
	152	(void)Create(w, h, d);
	153
	154	if ( wxTheBitmapList )
	155	wxTheBitmapList->AddBitmap(this);
	156	}
	157
	158	wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
	159	{
	160	(void) Create(data, type, width, height, depth);
	161
	162	if ( wxTheBitmapList )
	163	wxTheBitmapList->AddBitmap(this);
	164	}
	165
	166	wxBitmap::wxBitmap(const wxString& filename, long type)
	167	{
	168	LoadFile(filename, (int)type);
	169
	170	if ( wxTheBitmapList )
	171	wxTheBitmapList->AddBitmap(this);
	172	}
	173
	174	bool wxBitmap::Create(int w, int h, int d)
	175	{
	176	UnRef();
	177
	178	m_refData = new wxBitmapRefData;
	179
	180	M_BITMAPDATA->m_width = w;
	181	M_BITMAPDATA->m_height = h;
	182	M_BITMAPDATA->m_depth = d;
	183
	184	if (d > 0)
	185	{
	186	M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateBitmap(w, h, 1, d, NULL);
	187	}
	188	else
	189	{
	190	HDC dc = GetDC((HWND) NULL);
	191	M_BITMAPDATA->m_hBitmap = (WXHBITMAP) CreateCompatibleBitmap(dc, w, h);
	192	ReleaseDC((HWND) NULL, dc);
	193	M_BITMAPDATA->m_depth = wxDisplayDepth();
	194	}
	195	if (M_BITMAPDATA->m_hBitmap)
	196	M_BITMAPDATA->m_ok = TRUE;
	197	else
	198	M_BITMAPDATA->m_ok = FALSE;
	199	return M_BITMAPDATA->m_ok;
	200	}
	201
	202	bool wxBitmap::LoadFile(const wxString& filename, long type)
	203	{
	204	UnRef();
	205
	206	m_refData = new wxBitmapRefData;
	207
	208	wxBitmapHandler *handler = FindHandler(type);
	209
	210	if ( handler == NULL ) {
	211	wxLogWarning(_T("no bitmap handler for type %d defined."), type);
	212
	213	return FALSE;
	214	}
	215
	216	return handler->LoadFile(this, filename, type, -1, -1);
	217	}
	218
	219	bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
	220	{
	221	UnRef();
	222
	223	m_refData = new wxBitmapRefData;
	224
	225	wxBitmapHandler *handler = FindHandler(type);
	226
	227	if ( handler == NULL ) {
	228	wxLogWarning(_T("no bitmap handler for type %d defined."), type);
	229
	230	return FALSE;
	231	}
	232
	233	return handler->Create(this, data, type, width, height, depth);
	234	}
	235
	236	bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette)
	237	{
	238	wxBitmapHandler *handler = FindHandler(type);
	239
	240	if ( handler == NULL ) {
	241	wxLogWarning(_T("no bitmap handler for type %d defined."), type);
	242
	243	return FALSE;
	244	}
	245
	246	return handler->SaveFile(this, filename, type, palette);
	247	}
	248
	249	void wxBitmap::SetWidth(int w)
	250	{
	251	if (!M_BITMAPDATA)
	252	m_refData = new wxBitmapRefData;
	253
	254	M_BITMAPDATA->m_width = w;
	255	}
	256
	257	void wxBitmap::SetHeight(int h)
	258	{
	259	if (!M_BITMAPDATA)
	260	m_refData = new wxBitmapRefData;
	261
	262	M_BITMAPDATA->m_height = h;
	263	}
	264
	265	void wxBitmap::SetDepth(int d)
	266	{
	267	if (!M_BITMAPDATA)
	268	m_refData = new wxBitmapRefData;
	269
	270	M_BITMAPDATA->m_depth = d;
	271	}
	272
	273	void wxBitmap::SetQuality(int q)
	274	{
	275	if (!M_BITMAPDATA)
	276	m_refData = new wxBitmapRefData;
	277
	278	M_BITMAPDATA->m_quality = q;
	279	}
	280
	281	void wxBitmap::SetOk(bool isOk)
	282	{
	283	if (!M_BITMAPDATA)
	284	m_refData = new wxBitmapRefData;
	285
	286	M_BITMAPDATA->m_ok = isOk;
	287	}
	288
	289	void wxBitmap::SetPalette(const wxPalette& palette)
	290	{
	291	if (!M_BITMAPDATA)
	292	m_refData = new wxBitmapRefData;
	293
	294	M_BITMAPDATA->m_bitmapPalette = palette ;
	295	}
	296
	297	void wxBitmap::SetMask(wxMask *mask)
	298	{
	299	if (!M_BITMAPDATA)
	300	m_refData = new wxBitmapRefData;
	301
	302	M_BITMAPDATA->m_bitmapMask = mask ;
	303	}
	304
	305	void wxBitmap::SetHBITMAP(WXHBITMAP bmp)
	306	{
	307	if (!M_BITMAPDATA)
	308	m_refData = new wxBitmapRefData;
	309
	310	M_BITMAPDATA->m_hBitmap = bmp;
	311	}
	312
	313	void wxBitmap::AddHandler(wxBitmapHandler *handler)
	314	{
	315	sm_handlers.Append(handler);
	316	}
	317
	318	void wxBitmap::InsertHandler(wxBitmapHandler *handler)
	319	{
	320	sm_handlers.Insert(handler);
	321	}
	322
	323	bool wxBitmap::RemoveHandler(const wxString& name)
	324	{
	325	wxBitmapHandler *handler = FindHandler(name);
	326	if ( handler )
	327	{
	328	sm_handlers.DeleteObject(handler);
	329	return TRUE;
	330	}
	331	else
	332	return FALSE;
	333	}
	334
	335	wxBitmapHandler *wxBitmap::FindHandler(const wxString& name)
	336	{
	337	wxNode *node = sm_handlers.First();
	338	while ( node )
	339	{
	340	wxBitmapHandler handler = (wxBitmapHandler )node->Data();
	341	if ( (handler->GetName().Cmp(name) == 0) )
	342	return handler;
	343	node = node->Next();
	344	}
	345	return NULL;
	346	}
	347
	348	wxBitmapHandler *wxBitmap::FindHandler(const wxString& extension, long bitmapType)
	349	{
	350	wxNode *node = sm_handlers.First();
	351	while ( node )
	352	{
	353	wxBitmapHandler handler = (wxBitmapHandler )node->Data();
	354	if ( (handler->GetExtension().Cmp(extension) == 0) &&
	355	(bitmapType == -1 \|\| (handler->GetType() == bitmapType)) )
	356	return handler;
	357	node = node->Next();
	358	}
	359	return NULL;
	360	}
	361
	362	wxBitmapHandler *wxBitmap::FindHandler(long bitmapType)
	363	{
	364	wxNode *node = sm_handlers.First();
	365	while ( node )
	366	{
	367	wxBitmapHandler handler = (wxBitmapHandler )node->Data();
	368	if (handler->GetType() == bitmapType)
	369	return handler;
	370	node = node->Next();
	371	}
	372	return NULL;
	373	}
	374
	375	// New Create/FreeDIB functions since ones in dibutils.cpp are confusing
	376	static long createDIB(long xSize, long ySize, long bitsPerPixel,
	377	HPALETTE hPal, LPBITMAPINFO* lpDIBHeader);
	378	static long freeDIB(LPBITMAPINFO lpDIBHeader);
	379
	380	// Creates a bitmap that matches the device context, from
	381	// an arbitray bitmap. At present, the original bitmap must have an
	382	// associated palette. TODO: use a default palette if no palette exists.
	383	// Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
	384	wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
	385	{
	386	wxMemoryDC memDC;
	387	wxBitmap tmpBitmap(this->GetWidth(), this->GetHeight(), dc.GetDepth());
	388	HPALETTE hPal = (HPALETTE) NULL;
	389	LPBITMAPINFO lpDib;
	390	void lpBits = (void) NULL;
	391
	392	/*
	393	wxASSERT( this->GetPalette() && this->GetPalette()->Ok() && (this->GetPalette()->GetHPALETTE() != 0) );
	394
	395	tmpBitmap.SetPalette(this->GetPalette());
	396	memDC.SelectObject(tmpBitmap);
	397	memDC.SetPalette(this->GetPalette());
	398
	399	hPal = (HPALETTE) this->GetPalette()->GetHPALETTE();
	400	*/
	401	if( this->GetPalette() && this->GetPalette()->Ok() && (this->GetPalette()->GetHPALETTE() != 0) )
	402	{
	403	tmpBitmap.SetPalette(* this->GetPalette());
	404	memDC.SelectObject(tmpBitmap);
	405	memDC.SetPalette(* this->GetPalette());
	406	hPal = (HPALETTE) this->GetPalette()->GetHPALETTE();
	407	}
	408	else
	409	{
	410	hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
	411	wxPalette palette;
	412	palette.SetHPALETTE( (WXHPALETTE)hPal );
	413	tmpBitmap.SetPalette( palette );
	414	memDC.SelectObject(tmpBitmap);
	415	memDC.SetPalette( palette );
	416	}
	417
	418	// set the height negative because in a DIB the order of the lines is reversed
	419	createDIB(this->GetWidth(), -this->GetHeight(), this->GetDepth(), hPal, &lpDib);
	420
	421	lpBits = malloc(lpDib->bmiHeader.biSizeImage);
	422
	423	::GetBitmapBits((HBITMAP)GetHBITMAP(), lpDib->bmiHeader.biSizeImage, lpBits);
	424
	425	::SetDIBitsToDevice((HDC) memDC.GetHDC(), 0, 0, this->GetWidth(), this->GetHeight(),
	426	0, 0, 0, this->GetHeight(), lpBits, lpDib, DIB_RGB_COLORS);
	427
	428	free(lpBits);
	429
	430	freeDIB(lpDib);
	431	return (tmpBitmap);
	432	}
	433
	434	/*
	435	* wxMask
	436	*/
	437
	438	wxMask::wxMask(void)
	439	{
	440	m_maskBitmap = 0;
	441	}
	442
	443	// Construct a mask from a bitmap and a colour indicating
	444	// the transparent area
	445	wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
	446	{
	447	m_maskBitmap = 0;
	448	Create(bitmap, colour);
	449	}
	450
	451	// Construct a mask from a bitmap and a palette index indicating
	452	// the transparent area
	453	wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
	454	{
	455	m_maskBitmap = 0;
	456	Create(bitmap, paletteIndex);
	457	}
	458
	459	// Construct a mask from a mono bitmap (copies the bitmap).
	460	wxMask::wxMask(const wxBitmap& bitmap)
	461	{
	462	m_maskBitmap = 0;
	463	Create(bitmap);
	464	}
	465
	466	wxMask::~wxMask(void)
	467	{
	468	if ( m_maskBitmap )
	469	::DeleteObject((HBITMAP) m_maskBitmap);
	470	}
	471
	472	// Create a mask from a mono bitmap (copies the bitmap).
	473	bool wxMask::Create(const wxBitmap& bitmap)
	474	{
	475	if ( m_maskBitmap )
	476	{
	477	::DeleteObject((HBITMAP) m_maskBitmap);
	478	m_maskBitmap = 0;
	479	}
	480	if (!bitmap.Ok() \|\| bitmap.GetDepth() != 1)
	481	{
	482	return FALSE;
	483	}
	484	m_maskBitmap = (WXHBITMAP) CreateBitmap(
	485	bitmap.GetWidth(),
	486	bitmap.GetHeight(),
	487	1, 1, 0
	488	);
	489	HDC srcDC = CreateCompatibleDC(0);
	490	SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
	491	HDC destDC = CreateCompatibleDC(0);
	492	SelectObject(destDC, (HBITMAP) m_maskBitmap);
	493	BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
	494	SelectObject(srcDC, 0);
	495	DeleteDC(srcDC);
	496	SelectObject(destDC, 0);
	497	DeleteDC(destDC);
	498	return TRUE;
	499	}
	500
	501	// Create a mask from a bitmap and a palette index indicating
	502	// the transparent area
	503	bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
	504	{
	505	if ( m_maskBitmap )
	506	{
	507	::DeleteObject((HBITMAP) m_maskBitmap);
	508	m_maskBitmap = 0;
	509	}
	510	if (bitmap.Ok() && bitmap.GetPalette()->Ok())
	511	{
	512	unsigned char red, green, blue;
	513	if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
	514	{
	515	wxColour transparentColour(red, green, blue);
	516	return Create(bitmap, transparentColour);
	517	}
	518	}
	519	return FALSE;
	520	}
	521
	522	// Create a mask from a bitmap and a colour indicating
	523	// the transparent area
	524	bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
	525	{
	526	if ( m_maskBitmap )
	527	{
	528	::DeleteObject((HBITMAP) m_maskBitmap);
	529	m_maskBitmap = 0;
	530	}
	531	if (!bitmap.Ok())
	532	{
	533	return FALSE;
	534	}
	535
	536	// scan the bitmap for the transparent colour and set
	537	// the corresponding pixels in the mask to BLACK and
	538	// the rest to WHITE
	539	COLORREF maskColour = RGB(colour.Red(), colour.Green(), colour.Blue());
	540	m_maskBitmap = (WXHBITMAP) ::CreateBitmap(
	541	bitmap.GetWidth(),
	542	bitmap.GetHeight(),
	543	1, 1, 0
	544	);
	545	HDC srcDC = ::CreateCompatibleDC(0);
	546	::SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
	547	HDC destDC = ::CreateCompatibleDC(0);
	548	::SelectObject(destDC, (HBITMAP) m_maskBitmap);
	549
	550	// this is not very efficient, but I can't think
	551	// of a better way of doing it
	552	for (int w = 0; w < bitmap.GetWidth(); w++)
	553	{
	554	for (int h = 0; h < bitmap.GetHeight(); h++)
	555	{
	556	COLORREF col = GetPixel(srcDC, w, h);
	557	if (col == maskColour)
	558	{
	559	::SetPixel(destDC, w, h, RGB(0, 0, 0));
	560	}
	561	else
	562	{
	563	::SetPixel(destDC, w, h, RGB(255, 255, 255));
	564	}
	565	}
	566	}
	567	::SelectObject(srcDC, 0);
	568	::DeleteDC(srcDC);
	569	::SelectObject(destDC, 0);
	570	::DeleteDC(destDC);
	571	return TRUE;
	572	}
	573
	574	/*
	575	* wxBitmapHandler
	576	*/
	577
	578	IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
	579
	580	bool wxBitmapHandler::Create(wxBitmap WXUNUSED(bitmap), void WXUNUSED(data), long WXUNUSED(type), int WXUNUSED(width), int WXUNUSED(height), int WXUNUSED(depth))
	581	{
	582	return FALSE;
	583	}
	584
	585	bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap), const wxString& WXUNUSED(name), long WXUNUSED(type),
	586	int WXUNUSED(desiredWidth), int WXUNUSED(desiredHeight))
	587	{
	588	return FALSE;
	589	}
	590
	591	bool wxBitmapHandler::SaveFile(wxBitmap WXUNUSED(bitmap), const wxString& WXUNUSED(name), int WXUNUSED(type), const wxPalette WXUNUSED(palette))
	592	{
	593	return FALSE;
	594	}
	595
	596	/*
	597	* Standard handlers
	598	*/
	599
	600	class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
	601	{
	602	DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
	603	public:
	604	inline wxBMPResourceHandler(void)
	605	{
	606	m_name = "Windows bitmap resource";
	607	m_extension = "";
	608	m_type = wxBITMAP_TYPE_BMP_RESOURCE;
	609	};
	610
	611	virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
	612	int desiredWidth, int desiredHeight);
	613	};
	614	IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)
	615
	616	bool wxBMPResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long WXUNUSED(flags),
	617	int WXUNUSED(desiredWidth), int WXUNUSED(desiredHeight))
	618	{
	619	// TODO: load colourmap.
	620	M_BITMAPHANDLERDATA->m_hBitmap = (WXHBITMAP) ::LoadBitmap(wxGetInstance(), name);
	621	if (M_BITMAPHANDLERDATA->m_hBitmap)
	622	{
	623	M_BITMAPHANDLERDATA->m_ok = TRUE;
	624	BITMAP bm;
	625	GetObject((HBITMAP) M_BITMAPHANDLERDATA->m_hBitmap, sizeof(BITMAP), (LPSTR) &bm);
	626	M_BITMAPHANDLERDATA->m_width = bm.bmWidth;
	627	M_BITMAPHANDLERDATA->m_height = bm.bmHeight;
	628	M_BITMAPHANDLERDATA->m_depth = bm.bmBitsPixel;
	629
	630	if ( bitmap->IsKindOf(CLASSINFO(wxIcon)) )
	631	{
	632	}
	633
	634	return TRUE;
	635	}
	636
	637	// it's probably not found
	638	wxLogError(_T("Can't load bitmap '%s' from resources! Check .rc file."), name.c_str());
	639
	640	return FALSE;
	641	}
	642
	643	class WXDLLEXPORT wxBMPFileHandler: public wxBitmapHandler
	644	{
	645	DECLARE_DYNAMIC_CLASS(wxBMPFileHandler)
	646	public:
	647	inline wxBMPFileHandler(void)
	648	{
	649	m_name = "Windows bitmap file";
	650	m_extension = "bmp";
	651	m_type = wxBITMAP_TYPE_BMP;
	652	};
	653
	654	virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
	655	int desiredWidth, int desiredHeight);
	656	virtual bool SaveFile(wxBitmap bitmap, const wxString& name, int type, const wxPalette palette = NULL);
	657	};
	658	IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler)
	659
	660	bool wxBMPFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long WXUNUSED(flags),
	661	int WXUNUSED(desiredWidth), int WXUNUSED(desiredHeight))
	662	{
	663	#if wxUSE_IMAGE_LOADING_IN_MSW
	664	wxPalette *palette = NULL;
	665	bool success = FALSE;
	666	/*
	667	if (type & wxBITMAP_DISCARD_COLOURMAP)
	668	success = wxLoadIntoBitmap(WXSTRINGCAST name, bitmap);
	669	else
	670	*/
	671	success = (wxLoadIntoBitmap(WXSTRINGCAST name, bitmap, &palette) != 0);
	672	if (!success && palette)
	673	{
	674	delete palette;
	675	palette = NULL;
	676	}
	677	if (palette)
	678	{
	679	M_BITMAPHANDLERDATA->m_bitmapPalette = *palette;
	680	delete palette;
	681	}
	682	return success;
	683	#else
	684	return FALSE;
	685	#endif
	686	}
	687
	688	bool wxBMPFileHandler::SaveFile(wxBitmap bitmap, const wxString& name, int WXUNUSED(type), const wxPalette pal)
	689	{
	690	#if wxUSE_IMAGE_LOADING_IN_MSW
	691	wxPalette actualPalette = (wxPalette )pal;
	692	if (!actualPalette && (!M_BITMAPHANDLERDATA->m_bitmapPalette.IsNull()))
	693	actualPalette = & (M_BITMAPHANDLERDATA->m_bitmapPalette);
	694	return (wxSaveBitmap(WXSTRINGCAST name, bitmap, actualPalette) != 0);
	695	#else
	696	return FALSE;
	697	#endif
	698	}
	699
	700	void wxBitmap::CleanUpHandlers(void)
	701	{
	702	wxNode *node = sm_handlers.First();
	703	while ( node )
	704	{
	705	wxBitmapHandler handler = (wxBitmapHandler )node->Data();
	706	wxNode *next = node->Next();
	707	delete handler;
	708	delete node;
	709	node = next;
	710	}
	711	}
	712
	713	void wxBitmap::InitStandardHandlers(void)
	714	{
	715	AddHandler(new wxBMPResourceHandler);
	716	AddHandler(new wxBMPFileHandler);
	717
	718	// Not added by default: include xpmhand.h in your app
	719	// and call these in your wxApp::OnInit.
	720	// AddHandler(new wxXPMFileHandler);
	721	// AddHandler(new wxXPMDataHandler);
	722
	723	AddHandler(new wxICOResourceHandler);
	724	AddHandler(new wxICOFileHandler);
	725	}
	726
	727	static long createDIB(long xSize, long ySize, long bitsPerPixel,
	728	HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
	729	{
	730	unsigned long i, headerSize;
	731	LPBITMAPINFO lpDIBheader = NULL;
	732	LPPALETTEENTRY lpPe = NULL;
	733
	734
	735	// Allocate space for a DIB header
	736	headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
	737	lpDIBheader = (BITMAPINFO *) malloc(headerSize);
	738	lpPe = (PALETTEENTRY )((BYTE)lpDIBheader + sizeof(BITMAPINFOHEADER));
	739
	740	GetPaletteEntries(hPal, 0, 256, lpPe);
	741
	742
	743	memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
	744
	745
	746	// Fill in the static parts of the DIB header
	747	lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	748	lpDIBheader->bmiHeader.biWidth = xSize;
	749	lpDIBheader->bmiHeader.biHeight = ySize;
	750	lpDIBheader->bmiHeader.biPlanes = 1;
	751
	752	// this value must be 1, 4, 8 or 24 so PixelDepth can only be
	753	lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
	754	lpDIBheader->bmiHeader.biCompression = BI_RGB;
	755	lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >>
	756	3;
	757	lpDIBheader->bmiHeader.biClrUsed = 256;
	758
	759
	760	// Initialize the DIB palette
	761	for (i = 0; i < 256; i++) {
	762	lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
	763	lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
	764	lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
	765	lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
	766	}
	767
	768	*lpDIBHeader = lpDIBheader;
	769
	770
	771	return (0);
	772
	773	}
	774
	775
	776
	777	static long freeDIB(LPBITMAPINFO lpDIBHeader)
	778	{
	779
	780	if (lpDIBHeader != NULL) {
	781	free(lpDIBHeader);
	782	}
	783
	784	return (0);
	785	}
	786
	787