X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/3ca6a5f04692678cd2d9f3ea0843fc3f5a0b254f..47793ab85a3fa3efd6039a28cfbef9cee20e7d9d:/src/common/imagjpeg.cpp?ds=inline

diff --git a/src/common/imagjpeg.cpp b/src/common/imagjpeg.cpp
index f985604631..c8db0ce961 100644
--- a/src/common/imagjpeg.cpp
+++ b/src/common/imagjpeg.cpp
@@ -20,20 +20,28 @@
 
 #include "wx/defs.h"
 
-#if wxUSE_LIBJPEG
+#if wxUSE_IMAGE && wxUSE_LIBJPEG
 
 #include "wx/imagjpeg.h"
 #include "wx/bitmap.h"
 #include "wx/debug.h"
 #include "wx/log.h"
 #include "wx/app.h"
-extern "C"
-{
-#ifdef __WATCOMC__
+
+// NB: Some compilers define boolean type in Windows headers (e.g. Watcom C++).
+//     This causes a conflict with jmorecfg.h header from libjpeg, so we have
+//     to make sure libjpeg won't try to define boolean itself. This is done by
+//     defining HAVE_BOOLEAN.
+#if defined(__WXMSW__) && (defined(__MWERKS__) || defined(__WATCOMC__))
     #define HAVE_BOOLEAN
+    #include <windows.h>
 #endif
+
+extern "C"
+{
     #include "jpeglib.h"
 }
+
 #include "wx/filefn.h"
 #include "wx/wfstream.h"
 #include "wx/intl.h"
@@ -50,9 +58,10 @@ extern "C"
 #endif
 #endif
 
-#ifdef __WXMSW__
-#include <windows.h>
-#endif
+// we can't use METHODDEF here as it includes static yet the functions must be
+// extern "C" and these can't be used together!
+#undef METHODDEF
+#define METHODDEF(type) extern "C" type wxC_CALLING_CONV
 
 //-----------------------------------------------------------------------------
 // wxJPEGHandler
@@ -102,7 +111,7 @@ METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes )
     {
         my_src_ptr src = (my_src_ptr) cinfo->src;
 
-        while (num_bytes > (long)src->pub.bytes_in_buffer) 
+        while (num_bytes > (long)src->pub.bytes_in_buffer)
         {
             num_bytes -= (long) src->pub.bytes_in_buffer;
             src->pub.fill_input_buffer(cinfo);
@@ -121,29 +130,6 @@ METHODDEF(void) my_term_source ( j_decompress_ptr cinfo )
     delete[] src->buffer;
 }
 
-void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile )
-{
-    my_src_ptr src;
-
-    if (cinfo->src == NULL) {    /* first time for this JPEG object? */
-        cinfo->src = (struct jpeg_source_mgr *)
-            (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-            sizeof(my_source_mgr));
-        src = (my_src_ptr) cinfo->src;
-    }
-    src = (my_src_ptr) cinfo->src;
-    src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
-    src->buffer = new JOCTET[JPEG_IO_BUFFER_SIZE];
-    src->pub.next_input_byte = NULL; /* until buffer loaded */
-    src->stream = &infile;
-
-    src->pub.init_source = my_init_source;
-    src->pub.fill_input_buffer = my_fill_input_buffer;
-    src->pub.skip_input_data = my_skip_input_data;
-    src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
-    src->pub.term_source = my_term_source;
-}
-
 
 // JPEG error manager:
 
@@ -159,8 +145,7 @@ typedef struct my_error_mgr * my_error_ptr;
  * Here's the routine that will replace the standard error_exit method:
  */
 
-METHODDEF(void)
-my_error_exit (j_common_ptr cinfo)
+METHODDEF(void) my_error_exit (j_common_ptr cinfo)
 {
   /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
   my_error_ptr myerr = (my_error_ptr) cinfo->err;
@@ -173,6 +158,30 @@ my_error_exit (j_common_ptr cinfo)
   longjmp(myerr->setjmp_buffer, 1);
 }
 
+void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile )
+{
+    my_src_ptr src;
+
+    if (cinfo->src == NULL) {    /* first time for this JPEG object? */
+        cinfo->src = (struct jpeg_source_mgr *)
+            (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+            sizeof(my_source_mgr));
+        src = (my_src_ptr) cinfo->src;
+    }
+    src = (my_src_ptr) cinfo->src;
+    src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
+    src->buffer = new JOCTET[JPEG_IO_BUFFER_SIZE];
+    src->pub.next_input_byte = NULL; /* until buffer loaded */
+    src->stream = &infile;
+
+    src->pub.init_source = my_init_source;
+    src->pub.fill_input_buffer = my_fill_input_buffer;
+    src->pub.skip_input_data = my_skip_input_data;
+    src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
+    src->pub.term_source = my_term_source;
+}
+
+
 // temporarily disable the warning C4611 (interaction between '_setjmp' and
 // C++ object destruction is non-portable) - I don't see any dtors here
 #ifdef __VISUALC__
@@ -198,8 +207,9 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos
       /* If we get here, the JPEG code has signaled an error.
        * We need to clean up the JPEG object, close the input file, and return.
        */
-      if (verbose) 
+      if (verbose)
         wxLogError(_("JPEG: Couldn't load - file is probably corrupted."));
+      (cinfo.src->term_source)(&cinfo);
       jpeg_destroy_decompress(&cinfo);
       if (image->Ok()) image->Destroy();
       return FALSE;
@@ -306,12 +316,12 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
     if (!verbose) cinfo.err->output_message=NULL;
 
     /* Establish the setjmp return context for my_error_exit to use. */
-    if (setjmp(jerr.setjmp_buffer)) 
+    if (setjmp(jerr.setjmp_buffer))
     {
         /* If we get here, the JPEG code has signaled an error.
          * We need to clean up the JPEG object, close the input file, and return.
          */
-         if (verbose) 
+         if (verbose)
             wxLogError(_("JPEG: Couldn't save image."));
          jpeg_destroy_compress(&cinfo);
          return FALSE;
@@ -357,7 +367,7 @@ bool wxJPEGHandler::DoCanRead( wxInputStream& stream )
 {
     unsigned char hdr[2];
 
-    stream.Read(&hdr, 2);
+    stream.Read(hdr, 2);
     stream.SeekI(-2, wxFromCurrent);
     return (hdr[0] == 0xFF && hdr[1] == 0xD8);
 }