small optimization in wxConfigPathChanger: don't change the path if it is already...

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

diff --git a/src/common/imagpcx.cpp b/src/common/imagpcx.cpp
index 2e50e2c5a502ced4c829492350b2613d9e5709be..14a3b0cff6424030c6efb168e58dacb55cf41b06 100644 (file)
--- a/src/common/imagpcx.cpp
+++ b/src/common/imagpcx.cpp
@@ -8,7 +8,7 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma implementation "imagpcx.h"
 #endif
 
@@ -21,9 +21,10 @@
 
 #ifndef WX_PRECOMP
 #  include "wx/defs.h"
+#  include "wx/palette.h"
 #endif
 
-#if wxUSE_IMAGE && wxUSE_STREAMS && wxUSE_PCX
+#if wxUSE_IMAGE && wxUSE_PCX
 
 #include "wx/imagpcx.h"
 #include "wx/wfstream.h"
@@ -35,6 +36,14 @@
 #include "wx/list.h"
 #include "wx/object.h"
 
+//-----------------------------------------------------------------------------
+// wxPCXHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxPCXHandler,wxImageHandler)
+
+#if wxUSE_STREAMS
+
 //-----------------------------------------------------------------------------
 // RLE encoding and decoding
 //-----------------------------------------------------------------------------
@@ -99,7 +108,7 @@ void RLEdecode(unsigned char *p, unsigned int size, wxInputStream& s)
         // If ((data & 0xC0) != 0xC0), then the value read is a data
         // byte. Else, it is a counter (cont = val & 0x3F) and the
         // next byte is the data byte.
-                 //
+
         if ((data & 0xC0) != 0xC0)
         {
             *(p++) = (unsigned char)data;
@@ -407,7 +416,7 @@ int SavePCX(wxImage *image, wxOutputStream& stream)
         memset(pal, 0, sizeof(pal));
 
         unsigned long index;
-        
+
         for (wxImageHistogram::iterator entry = histogram.begin();
              entry != histogram.end(); entry++ )
         {
@@ -429,8 +438,6 @@ int SavePCX(wxImage *image, wxOutputStream& stream)
 // wxPCXHandler
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxPCXHandler,wxImageHandler)
-
 bool wxPCXHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
 {
     int error;
@@ -440,7 +447,7 @@ bool wxPCXHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose
         if (verbose)
             wxLogError(_("PCX: this is not a PCX file."));
 
-        return FALSE;
+        return false;
     }
 
     image->Destroy();
@@ -458,10 +465,10 @@ bool wxPCXHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose
             }
         }
         image->Destroy();
-        return FALSE;
+        return false;
     }
 
-    return TRUE;
+    return true;
 }
 
 bool wxPCXHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
@@ -486,14 +493,15 @@ bool wxPCXHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos
 
 bool wxPCXHandler::DoCanRead( wxInputStream& stream )
 {
-    unsigned char c;
-
-    c = stream.GetC();
-    stream.SeekI(-1, wxFromCurrent);
+    unsigned char c = stream.GetC();
+    if ( !stream )
+        return false;
 
     // not very safe, but this is all we can get from PCX header :-(
-    return (c == 10);
+    return c == 10;
 }
 
-#endif // wxUSE_STREAMS && wxUSE_PCX
+#endif // wxUSE_STREAMS
+
+#endif // wxUSE_IMAGE && wxUSE_PCX