PCX images can now be embedded in streams

[wxWidgets.git] / src / msw / xpmhand.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        xpmhand.cpp
// Purpose:     wxBitmap: XPM handler and constructors
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #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"

#if wxUSE_XPM_IN_MSW
    #define FOR_MSW 1
    #include "../xpm/xpm34.h"
#endif

#include "wx/xpmhand.h"
#include "wx/msw/dib.h"

#if wxUSE_XPM_IN_MSW

static void XpmToBitmap(wxBitmap *bitmap,
                        const XImage *ximage,
                        const XpmAttributes& xpmAttr)
{
    wxBitmapRefData *refData = bitmap->GetBitmapData();
    refData->m_hBitmap = (WXHBITMAP)ximage->bitmap;

    BITMAP bm;
    if ( !::GetObject(GetHbitmapOf(*bitmap), sizeof(bm), (LPSTR) & bm) )
    {
        wxLogLastError("GetObject(bitmap)");
    }

    refData->m_width = bm.bmWidth;
    refData->m_height = bm.bmHeight;
    refData->m_depth = bm.bmPlanes * bm.bmBitsPixel;
    refData->m_numColors = xpmAttr.npixels;
}

#endif // wxUSE_XPM_IN_MSW

IMPLEMENT_DYNAMIC_CLASS(wxXPMFileHandler, wxBitmapHandler)

bool wxXPMFileHandler::LoadFile(wxBitmap *bitmap,
                                const wxString& name,
                                long flags,
                                int desiredWidth, int desiredHeight)
{
#if wxUSE_XPM_IN_MSW
    XImage *ximage;
    XpmAttributes xpmAttr;
    HDC     dc;

    dc = CreateCompatibleDC(NULL);
    if (dc)
    {
      xpmAttr.valuemask = XpmReturnPixels;
      int errorStatus = XpmReadFileToImage(&dc, wxMBSTRINGCAST name.fn_str(), &ximage, (XImage **) NULL, &xpmAttr);
      DeleteDC(dc);
      if (errorStatus == XpmSuccess)
      {
        XpmToBitmap(bitmap, ximage, xpmAttr);

        XpmFreeAttributes(&xpmAttr);
        XImageFree(ximage);
      }

#if WXWIN_COMPATIBILITY_2
      bitmap->SetOk(errorStatus == XpmSuccess);
#endif // WXWIN_COMPATIBILITY_2

      return bitmap->Ok();
    }
#endif

    return FALSE;
}

bool wxXPMFileHandler::SaveFile(wxBitmap *bitmap,
                                const wxString& name,
                                int type,
                                const wxPalette *palette)
{
#if wxUSE_XPM_IN_MSW
    HDC     dc = NULL;

    XImage  ximage;

    dc = CreateCompatibleDC(NULL);
    if (dc)
    {
        if ( SelectObject(dc, GetHbitmapOf(*bitmap)) )
        {
            /* for following SetPixel */
            /* fill the XImage struct 'by hand' */
            wxBitmapRefData *refData = bitmap->GetBitmapData();
            ximage.width = refData->m_width;
            ximage.height = refData->m_height;
            ximage.depth = refData->m_depth;
            ximage.bitmap = (HBITMAP)refData->m_hBitmap;
            int errorStatus = XpmWriteFileFromImage(&dc, wxMBSTRINGCAST name.fn_str(),
                                                    &ximage, (XImage *) NULL,
                                                    (XpmAttributes *) NULL);

            if (dc)
                DeleteDC(dc);

            if (errorStatus == XpmSuccess)
                return TRUE;    /* no error */
            else
                return FALSE;
        } else return FALSE;
    } else return FALSE;
#else
    return FALSE;
#endif
}

IMPLEMENT_DYNAMIC_CLASS(wxXPMDataHandler, wxBitmapHandler)

bool wxXPMDataHandler::Create(wxBitmap *bitmap,
                              void *data,
                              long flags,
                              int width,
                              int height,
                              int depth)
{
#if wxUSE_XPM_IN_MSW
  XImage *ximage;
  int     ErrorStatus;
  XpmAttributes xpmAttr;
  HDC     dc;

  dc = CreateCompatibleDC(NULL);  /* memory DC */

  if (dc)
  {
    xpmAttr.valuemask = XpmReturnInfos; /* get infos back */
    ErrorStatus = XpmCreateImageFromData(&dc, (char **)data,
                                         &ximage, (XImage **) NULL, &xpmAttr);

    if (ErrorStatus == XpmSuccess)
    {
        XpmToBitmap(bitmap, ximage, xpmAttr);

      XpmFreeAttributes(&xpmAttr);

      XImageFree(ximage); // releases the malloc, but does not detroy
                          // the bitmap
    }
    else
    {
      //    XpmDebugError(ErrorStatus, NULL);
    }

    DeleteDC(dc);

#if WXWIN_COMPATIBILITY_2
      bitmap->SetOk(errorStatus == XpmSuccess);
#endif // WXWIN_COMPATIBILITY_2

    return bitmap->Ok();
  }
#endif

  return FALSE;
}