X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/479cd5de40ca8029c79e780170fa7c0af7ec0297..2ec6905c69c73f908533697c770c690657f4371c:/src/common/imagpng.cpp

diff --git a/src/common/imagpng.cpp b/src/common/imagpng.cpp
index f869ffedee..cbbc10b261 100644
--- a/src/common/imagpng.cpp
+++ b/src/common/imagpng.cpp
@@ -22,7 +22,7 @@
   #include "wx/defs.h"
 #endif
 
-#if wxUSE_LIBPNG
+#if wxUSE_IMAGE && wxUSE_LIBPNG
 
 #include "wx/imagpng.h"
 #include "wx/bitmap.h"
@@ -57,17 +57,19 @@ IMPLEMENT_DYNAMIC_CLASS(wxPNGHandler,wxImageHandler)
 #if wxUSE_LIBPNG
 
 #if defined(__VISAGECPP__)
-#define LINKAGEMODE _Optlink
+#define PNGLINKAGEMODE _Optlink
+#elif defined(__WATCOMC__)
+#define PNGLINKAGEMODE _cdecl
 #else
-#define LINKAGEMODE
+#define PNGLINKAGEMODE
 #endif
 
-static void LINKAGEMODE _PNG_stream_reader( png_structp png_ptr, png_bytep data, png_size_t length )
+static void PNGLINKAGEMODE _PNG_stream_reader( png_structp png_ptr, png_bytep data, png_size_t length )
 {
     ((wxInputStream*) png_get_io_ptr( png_ptr )) -> Read(data, length);
 }
 
-static void LINKAGEMODE _PNG_stream_writer( png_structp png_ptr, png_bytep data, png_size_t length )
+static void PNGLINKAGEMODE _PNG_stream_writer( png_structp png_ptr, png_bytep data, png_size_t length )
 {
     ((wxOutputStream*) png_get_io_ptr( png_ptr )) -> Write(data, length);
 }
@@ -75,7 +77,7 @@ static void LINKAGEMODE _PNG_stream_writer( png_structp png_ptr, png_bytep data,
 // from pngerror.c
 // so that the libpng doesn't send anything on stderr
 void
-LINKAGEMODE png_silent_error(png_structp png_ptr, png_const_charp WXUNUSED(message))
+PNGLINKAGEMODE png_silent_error(png_structp png_ptr, png_const_charp WXUNUSED(message))
 {
 #ifdef USE_FAR_KEYWORD
    {
@@ -89,10 +91,16 @@ LINKAGEMODE png_silent_error(png_structp png_ptr, png_const_charp WXUNUSED(messa
 }
 
 void
-LINKAGEMODE png_silent_warning(png_structp WXUNUSED(png_ptr), png_const_charp WXUNUSED(message))
+PNGLINKAGEMODE png_silent_warning(png_structp WXUNUSED(png_ptr), png_const_charp WXUNUSED(message))
 {
 }
 
+// temporarily disable the warning C4611 (interaction between '_setjmp' and
+// C++ object destruction is non-portable) - I don't see any dtors here
+#ifdef __VISUALC__
+    #pragma warning(disable:4611)
+#endif /* VC++ */
+
 bool wxPNGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
 {
     // VZ: as this function uses setjmp() the only fool proof error handling
@@ -267,7 +275,6 @@ bool wxPNGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose
     return FALSE;
 }
 
-
 bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
 {
     {
@@ -346,11 +353,15 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos
     return TRUE;
 }
 
+#ifdef __VISUALC__
+    #pragma warning(default:4611)
+#endif /* VC++ */
+
 bool wxPNGHandler::DoCanRead( wxInputStream& stream )
 {
     unsigned char hdr[4];
 
-    stream.Read(&hdr, 4);
+    stream.Read(hdr, 4);
     stream.SeekI(-4, wxFromCurrent);
     return (hdr[0] == 0x89 && hdr[1] == 'P' && hdr[2] == 'N' && hdr[3] == 'G');
 }