don't return void values

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

diff --git a/src/common/imagpng.cpp b/src/common/imagpng.cpp
index 84c0d89c93d014a00996899c57052ad577b10edb..1d8a97046dba72fdef5297b72371ece92662ca70 100644 (file)
--- a/src/common/imagpng.cpp
+++ b/src/common/imagpng.cpp
@@ -11,10 +11,6 @@
 // declarations
 // ============================================================================
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "imagpng.h"
-#endif
-
 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------
@@ -109,7 +105,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxPNGHandler,wxImageHandler)
 #if wxUSE_STREAMS
 
 #ifndef PNGLINKAGEMODE
-    #if defined(__WATCOMC__) && ( defined(__WXMSW__) || __WATCOMC__ > 1230 )
+    #if defined(__WATCOMC__) && ( defined(__WXMSW__) || defined(__WXMGL__) )
         // we need an explicit cdecl for Watcom, at least according to
         //
         // http://sf.net/tracker/index.php?func=detail&aid=651492&group_id=9863&atid=109863
@@ -172,14 +168,6 @@ void PNGLINKAGEMODE wx_PNG_stream_writer( png_structp png_ptr, png_bytep data,
     WX_PNG_INFO(png_ptr)->stream.out->Write(data, length);
 }
 
-// from pngerror.c
-// so that the libpng doesn't send anything on stderr
-void
-PNGLINKAGEMODE wx_png_error(png_structp WXUNUSED(png_ptr), png_const_charp message)
-{
-    wxLogFatalError( wxString::FromAscii(message) );
-}
-
 void
 PNGLINKAGEMODE wx_png_warning(png_structp png_ptr, png_const_charp message)
 {
@@ -188,6 +176,19 @@ PNGLINKAGEMODE wx_png_warning(png_structp png_ptr, png_const_charp message)
         wxLogWarning( wxString::FromAscii(message) );
 }
 
+// from pngerror.c
+// so that the libpng doesn't send anything on stderr
+void
+PNGLINKAGEMODE wx_png_error(png_structp png_ptr, png_const_charp message)
+{
+    wx_png_warning(NULL, message);
+
+    // we're not using libpng built-in jump buffer (see comment before
+    // wxPNGInfoStruct above) so we have to return ourselves, otherwise libpng
+    // would just abort
+    longjmp(WX_PNG_INFO(png_ptr)->jmpbuf, 1);
+}
+
 } // extern "C"
 
 // ----------------------------------------------------------------------------
@@ -507,13 +508,16 @@ wxPNGHandler::LoadFile(wxImage *image,
                        bool verbose,
                        int WXUNUSED(index))
 {
-    // VZ: as this function uses setjmp() the only fool proof error handling
+    // VZ: as this function uses setjmp() the only fool-proof error handling
     //     method is to use goto (setjmp is not really C++ dtors friendly...)
 
     unsigned char **lines = NULL;
     png_infop info_ptr = (png_infop) NULL;
     wxPNGInfoStruct wxinfo;
 
+    png_uint_32 i, width, height = 0;
+    int bit_depth, color_type, interlace_type;
+
     wxinfo.verbose = verbose;
     wxinfo.stream.in = &stream;
 
@@ -540,9 +544,6 @@ wxPNGHandler::LoadFile(wxImage *image,
     if (setjmp(wxinfo.jmpbuf))
         goto error;
 
-    png_uint_32 i, width, height;
-    int bit_depth, color_type, interlace_type;
-
     png_read_info( png_ptr, info_ptr );
     png_get_IHDR( png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, (int*) NULL, (int*) NULL );
 
@@ -602,6 +603,9 @@ error:
 
     if ( lines )
     {
+        for ( unsigned int n = 0; n < height; n++ )
+            free( lines[n] );
+
         free( lines );
     }