changed wxCreateGreyedImage() to respect the original image mask

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

diff --git a/src/common/imagpnm.cpp b/src/common/imagpnm.cpp
index ffbd4c1bd4ce898640705ab0754299f045278e74..1fa96b89a081a764db5422a86176509028c06e60 100644 (file)
--- a/src/common/imagpnm.cpp
+++ b/src/common/imagpnm.cpp
@@ -7,10 +7,9 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-/*
-   We don't put pragma implement in this file because it is already present in
-   src/common/image.cpp
-*/
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+#pragma implementation "imagpnm.h"
+#endif
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
@@ -19,123 +18,142 @@
 #pragma hdrstop
 #endif
 
-#include "wx/image.h"
+#ifndef WX_PRECOMP
+#  include "wx/setup.h"
+#endif
+
+#if wxUSE_IMAGE && wxUSE_PNM
+
+#include "wx/imagpnm.h"
 #include "wx/log.h"
+#include "wx/intl.h"
 #include "wx/txtstrm.h"
 
-#ifdef __WXMSW__
-#include <windows.h>
-#endif
-
 //-----------------------------------------------------------------------------
 // wxBMPHandler
 //-----------------------------------------------------------------------------
 
-#if !USE_SHARED_LIBRARIES
 IMPLEMENT_DYNAMIC_CLASS(wxPNMHandler,wxImageHandler)
-#endif
 
 #if wxUSE_STREAMS
 
-  //#include <stream.h> // for cout
-
 void Skip_Comment(wxInputStream &stream)
 {
-  wxString line;
-  wxTextInputStream text_stream(stream);
+    wxTextInputStream text_stream(stream);
 
-  if (stream.Peek()==_T('#')) 
+    if (stream.Peek()==wxT('#'))
     {
-      text_stream >> line;
-      Skip_Comment(stream);
+        text_stream.ReadLine();
+        Skip_Comment(stream);
     }
 }
 
-bool wxPNMHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSED(verbose) )
+bool wxPNMHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
 {
     wxUint32  width, height;
     wxUint16  maxval;
-    wxString  line;
     char      c(0);
-    
+
     image->Destroy();
 
     /*
      * Read the PNM header
      */
 
-    wxTextInputStream text_stream(stream);
+    wxBufferedInputStream buf_stream(stream);
+    wxTextInputStream text_stream(buf_stream);
 
-    Skip_Comment(stream);
-    if (stream.GetC()==_T('P')) c=stream.GetC();
+    Skip_Comment(buf_stream);
+    if (buf_stream.GetC()==wxT('P')) c=buf_stream.GetC();
 
     switch (c)
-      {
-      case _T('2'):
-       wxLogError(_T("Loading Grey Ascii PNM image is not yet implemented."));
-       return FALSE;
-      case _T('5'):
-       wxLogError(_T("Loading Grey Raw PNM image is not yet implemented."));
-       return FALSE;
-      case _T('3'): case _T('6'): break;
-       default :
-       wxLogError(_T("Loading PNM image : file not recognized."));
-       return FALSE;
-      }
+    {
+        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;
+        default:
+            if (verbose) wxLogError(_("PNM: File format is not recognized."));
+            return false;
+    }
 
-    text_stream >> line; // for the \n
-    Skip_Comment(stream);
+    text_stream.ReadLine(); // for the \n
+    Skip_Comment(buf_stream);
     text_stream >> width >> height ;
-    Skip_Comment(stream); 
+    Skip_Comment(buf_stream);
     text_stream >> maxval;
 
-    //cout << width << " " << height << " " << maxval << endl;
+    //cout << line << " " << width << " " << height << " " << maxval << endl;
     image->Create( width, height );
     unsigned char *ptr = image->GetData();
     if (!ptr)
     {
-        wxLogError( _T("Cannot allocate RAM for RGB data in PNM file.") );
-       return FALSE;
+        if (verbose)
+           wxLogError( _("PNM: Couldn't allocate memory.") );
+        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();
-           *ptr++=(unsigned char)value;
-
-           if (stream.LastError()!=wxSTREAM_NOERROR)
-             {
-               wxLogError(_T("Loading PNM image : 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();
+            *ptr++=(unsigned char)value;
+
+            if ( !buf_stream )
+              {
+                if (verbose) wxLogError(_("PNM: File seems truncated."));
+                return false;
+              }
+          }
       }
     if (c=='6') // Raw RGB
-      stream.Read( ptr, 3*width*height );
+      buf_stream.Read( ptr, 3*width*height );
 
-    image->SetMask( FALSE );
+    image->SetMask( false );
 
-    return (stream.LastError()==wxStream_NOERROR || 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) )
 {
     wxTextOutputStream text_stream(stream);
-    
-    //text_stream << "P6" << endl 
-    //<< image->GetWidth() << " " << image->GetHeight() << 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());
 
-    return (stream.LastError()==wxStream_NOERROR);
+    return stream.IsOk();
 }
 
-#endif // wxUSE_STREAMS
+bool wxPNMHandler::DoCanRead( wxInputStream& stream )
+{
+    Skip_Comment(stream);
 
+    if ( stream.GetC() == 'P' )
+    {
+        switch (stream.GetC())
+        {
+            case '3':
+            case '6':
+                return true;
+        }
+    }
+
+    return false;
+}
+
+
+#endif // wxUSE_STREAMS
 
+#endif // wxUSE_PNM