Return NULL from wxWindow::GetCapture() when the capture is being lost.

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

diff --git a/src/common/imagpnm.cpp b/src/common/imagpnm.cpp
index 3c34cbc82236a10ee4bfc8df87531ec1fe943e29..d8539120872b1a0ce6f921ff169ccef352ab09d4 100644 (file)
--- a/src/common/imagpnm.cpp
+++ b/src/common/imagpnm.cpp
@@ -1,33 +1,27 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        imagpnm.cpp
+// Name:        src/common/imagpnm.cpp

 // Purpose:     wxImage PNM handler
 // Author:      Sylvain Bougnoux
 // Purpose:     wxImage PNM handler
 // Author:      Sylvain Bougnoux

-// RCS-ID:      $Id$

 // Copyright:   (c) Sylvain Bougnoux
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Copyright:   (c) Sylvain Bougnoux
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-/*
-   We don't put pragma implement in this file because it is already present in
-   src/common/image.cpp
-*/
-

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

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #endif
 

+#if wxUSE_IMAGE && wxUSE_PNM
+
+#include "wx/imagpnm.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-#  include "wx/setup.h"
+    #include "wx/intl.h"
+    #include "wx/log.h"

 #endif
 
 #endif
 

-#if wxUSE_PNM
-
-#include "wx/image.h"
-#include "wx/log.h"
-#include "wx/intl.h"

 #include "wx/txtstrm.h"
 
 //-----------------------------------------------------------------------------
 #include "wx/txtstrm.h"
 
 //-----------------------------------------------------------------------------


@@ -40,12 +34,12 @@ IMPLEMENT_DYNAMIC_CLASS(wxPNMHandler,wxImageHandler)
 
 void Skip_Comment(wxInputStream &stream)
 {
 
 void Skip_Comment(wxInputStream &stream)
 {

-  wxTextInputStream text_stream(stream);
+    wxTextInputStream text_stream(stream);

 
 

-  if (stream.Peek()==wxT('#'))
+    if (stream.Peek()==wxT('#'))

     {
     {

-      text_stream.ReadLine();
-      Skip_Comment(stream);
+        text_stream.ReadLine();
+        Skip_Comment(stream);

     }
 }
 
     }
 }
 


@@ -69,17 +63,16 @@ bool wxPNMHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose
 
     switch (c)
     {
 
     switch (c)
     {

-        case wxT('2'):
-            if (verbose) wxLogError(_("Loading Grey Ascii PNM image is not yet implemented."));
-            return FALSE;
-        case wxT('5'):
-            if (verbose) wxLogError(_("Loading Grey Raw PNM image is not yet implemented."));
-            return FALSE;
-        case wxT('3'): 
-       case wxT('6'): break;
+        case wxT('2'): // ASCII Grey
+        case wxT('3'): // ASCII RGB
+        case wxT('5'): // RAW Grey
+        case wxT('6'): break;

         default:
         default:

-            if (verbose) wxLogError(_("PNM: File format is not recognized."));
-            return FALSE;
+            if (verbose)
+            {
+                wxLogError(_("PNM: File format is not recognized."));
+            }
+            return false;

     }
 
     text_stream.ReadLine(); // for the \n
     }
 
     text_stream.ReadLine(); // for the \n


@@ -94,33 +87,93 @@ bool wxPNMHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose
     if (!ptr)
     {
         if (verbose)
     if (!ptr)
     {
         if (verbose)

+        {

            wxLogError( _("PNM: Couldn't allocate memory.") );
            wxLogError( _("PNM: Couldn't allocate memory.") );

-        return FALSE;
+        }
+        return false;

     }
 
     }
 

-   if (c=='3') // Ascii RBG
-      {
+
+    if (c=='2') // Ascii GREY
+    {
+        wxUint32 value, size=width*height;
+        for (wxUint32 i=0; i<size; ++i)
+        {
+            value=text_stream.Read32();
+            if ( maxval != 255 )
+                value = (255 * value)/maxval;
+            *ptr++=(unsigned char)value; // R
+            *ptr++=(unsigned char)value; // G
+            *ptr++=(unsigned char)value; // B
+            if ( !buf_stream )
+            {
+                if (verbose)
+                {
+                    wxLogError(_("PNM: File seems truncated."));
+                }
+                return false;
+            }
+        }
+    }
+    if (c=='3') // Ascii RBG
+    {

         wxUint32 value, size=3*width*height;
         for (wxUint32 i=0; i<size; ++i)
           {
             //this is very slow !!!
             //I wonder how we can make any better ?
             value=text_stream.Read32();
         wxUint32 value, size=3*width*height;
         for (wxUint32 i=0; i<size; ++i)
           {
             //this is very slow !!!
             //I wonder how we can make any better ?
             value=text_stream.Read32();

+            if ( maxval != 255 )
+                value = (255 * value)/maxval;

             *ptr++=(unsigned char)value;
 
             *ptr++=(unsigned char)value;
 

-            if (buf_stream.LastError()!=wxSTREAM_NOERROR)
+            if ( !buf_stream )

               {
               {

-                if (verbose) wxLogError(_("PNM: File seems truncated."));
-                return FALSE;
+                if (verbose)
+                {
+                    wxLogError(_("PNM: File seems truncated."));
+                }
+                return false;

               }
           }
               }
           }

-      }
-    if (c=='6') // Raw RGB
-      buf_stream.Read( ptr, 3*width*height );
+    }
+    if (c=='5') // Raw GREY
+    {
+        wxUint32 size=width*height;
+        unsigned char value;
+        for (wxUint32 i=0; i<size; ++i)
+        {
+            buf_stream.Read(&value,1);
+            if ( maxval != 255 )
+                value = (255 * value)/maxval;
+            *ptr++=value; // R
+            *ptr++=value; // G
+            *ptr++=value; // B
+            if ( !buf_stream )
+            {
+                if (verbose)
+                {
+                    wxLogError(_("PNM: File seems truncated."));
+                }
+                return false;
+            }
+        }
+    }

 
 

-    image->SetMask( FALSE );
+    if ( c=='6' ) // Raw RGB
+    {
+        buf_stream.Read(ptr, 3*width*height);
+        if ( maxval != 255 )
+        {
+            for ( unsigned i = 0; i < 3*width*height; i++ )
+                ptr[i] = (255 * ptr[i])/maxval;
+        }
+    }
+
+    image->SetMask( false );

 
 

-    return (buf_stream.LastError()==wxStream_NOERROR || buf_stream.LastError()==wxStream_EOF);
+    const wxStreamError err = buf_stream.GetLastError();
+    return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF;

 }
 
 bool wxPNMHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool WXUNUSED(verbose) )
 }
 
 bool wxPNMHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool WXUNUSED(verbose) )


@@ -130,34 +183,33 @@ bool wxPNMHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool WXUNUS
     //text_stream << "P6" << endl
     //<< image->GetWidth() << " " << image->GetHeight() << endl
     //<< "255" << endl;
     //text_stream << "P6" << endl
     //<< image->GetWidth() << " " << image->GetHeight() << endl
     //<< "255" << endl;

-    text_stream << "P6\n" << image->GetWidth() << " " << image->GetHeight() << "\n255\n";
+    text_stream << wxT("P6\n") << image->GetWidth() << wxT(" ") << image->GetHeight() << wxT("\n255\n");

     stream.Write(image->GetData(),3*image->GetWidth()*image->GetHeight());
 
     stream.Write(image->GetData(),3*image->GetWidth()*image->GetHeight());
 

-    return (stream.LastError()==wxStream_NOERROR);
+    return stream.IsOk();

 }
 
 bool wxPNMHandler::DoCanRead( wxInputStream& stream )
 {
 }
 
 bool wxPNMHandler::DoCanRead( wxInputStream& stream )
 {

-    off_t pos = stream.TellI();
-

     Skip_Comment(stream);
 
     Skip_Comment(stream);
 

+    // it's ok to modify the stream position here

     if ( stream.GetC() == 'P' )
     {
     if ( stream.GetC() == 'P' )
     {

-        switch (stream.GetC())
+        switch ( stream.GetC() )

         {
         {

-            case '3':
-            case '6':
-                stream.SeekI(pos);
-                return TRUE;
+            case '2': // ASCII Grey
+            case '3': // ASCII RGB
+            case '5': // RAW Grey
+            case '6': // RAW RGB
+                return true;

         }
     }
 
         }
     }
 

-    stream.SeekI(pos);
-    return FALSE;
+    return false;

 }
 
 
 #endif // wxUSE_STREAMS
 
 }
 
 
 #endif // wxUSE_STREAMS
 

-#endif // wxUSE_PNM
+#endif // wxUSE_IMAGE && wxUSE_PNM