wxDialUpManager fixes

[wxWidgets.git] / src / common / image.cpp

diff --git a/src/common/image.cpp b/src/common/image.cpp
index a67a7445acc44d845f4fe876780ce24b2f9c70fa..ab36e52be6d04b5260e104fd2823efe0c9cd274f 100644 (file)
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -189,6 +189,43 @@ wxImage wxImage::Scale( int width, int height ) const
     return image;
 }
 
+wxImage wxImage::GetSubImage( const wxRect &rect ) const
+{
+    wxImage image;
+
+    wxCHECK_MSG( Ok(), image, _T("invalid image") );
+
+    wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight())
+                , image, _T("invalid subimage size") );
+
+    int subwidth=rect.GetWidth();
+    const int subheight=rect.GetHeight();
+
+    image.Create( subwidth, subheight );
+
+    char unsigned *subdata = image.GetData(), *data=GetData();
+
+    wxCHECK_MSG( subdata, image, _T("unable to create image") );
+
+    if (M_IMGDATA->m_hasMask)
+        image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+
+    const int subleft=3*rect.GetLeft();
+    const int width=3*GetWidth();
+    subwidth*=3;
+    
+    data+=rect.GetTop()*width+subleft;
+
+    for (long j = 0; j < subheight; ++j)
+    {
+        memcpy( subdata, data, subwidth);
+        subdata+=subwidth;
+       data+=width;
+    }
+
+    return image;
+}
+
 void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
 {
     wxCHECK_RET( Ok(), _T("invalid image") );
@@ -263,7 +300,20 @@ void wxImage::SetData( char unsigned *data )
 {
     wxCHECK_RET( Ok(), _T("invalid image") );
 
-    memcpy(M_IMGDATA->m_data, data, M_IMGDATA->m_width * M_IMGDATA->m_height * 3);
+    wxImageRefData *newRefData = new wxImageRefData();
+
+    newRefData->m_width = M_IMGDATA->m_width;
+    newRefData->m_height = M_IMGDATA->m_height;
+    newRefData->m_data = data;
+    newRefData->m_ok = TRUE;
+    newRefData->m_maskRed = M_IMGDATA->m_maskRed;
+    newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
+    newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
+    newRefData->m_hasMask = M_IMGDATA->m_hasMask;
+    
+    UnRef();
+    
+    m_refData = newRefData;
 }
 
 void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
@@ -388,7 +438,6 @@ bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
 }
 
 #if wxUSE_STREAMS
-//#include <stream.h>
 
 bool wxImage::LoadFile( wxInputStream& stream, long type )
 {
@@ -400,25 +449,17 @@ bool wxImage::LoadFile( wxInputStream& stream, long type )
 
     if (type==wxBITMAP_TYPE_ANY)
     {
-      // here we can try to guess the handler according the extension,
-      // but we lose the stream name !?
-      // Probably we should write methods such as 
-      // bool wxImageHandler::IsAppropriate(wxString&)
-      // bool wxImageHandler::IsAppropriate(sxInputStream&&)
-      // for png : see example.c
        wxList &list=GetHandlers();
-       off_t pos=stream.TellI();
-
-        wxLogNull prevent_log;
 
        for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
-       {
-           handler=(wxImageHandler*)node->GetData();
-           //cout << handler->GetExtension() << endl;
-           if (handler->LoadFile( this, stream, FALSE )) return TRUE;
-           stream.SeekI(pos);
+       {  
+           handler=(wxImageHandler*)node->GetData();
+        if (handler->CanRead( stream ))
+            return handler->LoadFile( this, stream );
+
        }
 
+       wxLogWarning( _T("No handler found for this image.") );
        return FALSE;
     }
 
@@ -600,6 +641,33 @@ bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSE
 {
     return FALSE;
 }
+
+bool wxImageHandler::CanRead( wxInputStream& stream )
+{
+    return FALSE;
+}
+
+bool wxImageHandler::CanRead( const wxString& name )
+{
+#if wxUSE_STREAMS
+    if (wxFileExists(name))
+    {
+        wxFileInputStream stream(name);
+        return CanRead(stream);
+    }
+
+    else {
+        wxLogError( _T("Can't check image format of file '%s': file does not exist."), name.c_str() );
+
+        return FALSE;
+    }
+#else // !wxUSE_STREAMS
+    return FALSE;
+#endif // wxUSE_STREAMS
+}
+
+
+
 #endif // wxUSE_STREAMS
 
 //-----------------------------------------------------------------------------
@@ -614,7 +682,11 @@ wxBitmap wxImage::ConvertToBitmap() const
         return wxNullBitmap;
 
     // sizeLimit is the MS upper limit for the DIB size
+#ifdef  WIN32
     int sizeLimit = 1024*768*3;
+#else
+    int sizeLimit = 0x7fff ;
+#endif
 
     // width and height of the device-dependent bitmap
     int width = GetWidth();