// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "imagjpeg.h"
#endif
#include "wx/debug.h"
#include "wx/log.h"
#include "wx/app.h"
+
+// NB: Some compilers define boolean type in Windows headers
+// (e.g. Watcom C++, but not Open Watcom).
+// 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(__DIGITALMARS__) || (defined(__WATCOMC__) && __WATCOMC__ < 1200))
+ #define HAVE_BOOLEAN
+ #include "wx/msw/wrapwin.h"
+#endif
+
extern "C"
{
#include "jpeglib.h"
}
+
#include "wx/filefn.h"
#include "wx/wfstream.h"
#include "wx/intl.h"
#include <setjmp.h>
#ifdef __SALFORDC__
-#ifdef FAR
#undef FAR
#endif
-#endif
-#ifdef __WXMSW__
-#include <windows.h>
+// ----------------------------------------------------------------------------
+// types
+// ----------------------------------------------------------------------------
+
+// the standard definition of METHODDEF(type) from jmorecfg.h is "static type"
+// which means that we can't declare the method functions as extern "C" - the
+// compiler (rightfully) complains about the multiple storage classes in
+// declaration
+//
+// so we only add extern "C" when using our own, modified, jmorecfg.h - and use
+// whatever we have in the system headers if this is what we use hoping that it
+// should be ok (can't do anything else)
+#ifdef JPEG_METHOD_LINKAGE
+ #define CPP_METHODDEF(type) extern "C" METHODDEF(type)
+#else // not using our jmorecfg.h header
+ #define CPP_METHODDEF(type) METHODDEF(type)
#endif
//-----------------------------------------------------------------------------
typedef my_source_mgr * my_src_ptr;
-METHODDEF(void) my_init_source ( j_decompress_ptr WXUNUSED(cinfo) )
+CPP_METHODDEF(void) my_init_source ( j_decompress_ptr WXUNUSED(cinfo) )
{
}
-METHODDEF(boolean) my_fill_input_buffer ( j_decompress_ptr cinfo )
+CPP_METHODDEF(boolean) my_fill_input_buffer ( j_decompress_ptr cinfo )
{
my_src_ptr src = (my_src_ptr) cinfo->src;
return TRUE;
}
-METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes )
+CPP_METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes )
{
if (num_bytes > 0)
{
}
}
-METHODDEF(void) my_term_source ( j_decompress_ptr cinfo )
+CPP_METHODDEF(void) my_term_source ( j_decompress_ptr cinfo )
{
my_src_ptr src = (my_src_ptr) cinfo->src;
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:
* Here's the routine that will replace the standard error_exit method:
*/
-METHODDEF(void)
-my_error_exit (j_common_ptr cinfo)
+CPP_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;
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->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__
#define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */
-METHODDEF(void) init_destination (j_compress_ptr cinfo)
+CPP_METHODDEF(void) init_destination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
}
-METHODDEF(boolean) empty_output_buffer (j_compress_ptr cinfo)
+CPP_METHODDEF(boolean) empty_output_buffer (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
return TRUE;
}
-METHODDEF(void) term_destination (j_compress_ptr cinfo)
+CPP_METHODDEF(void) term_destination (j_compress_ptr cinfo)
{
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
if (image->HasOption(wxT("quality")))
jpeg_set_quality(&cinfo, image->GetOptionInt(wxT("quality")), TRUE);
+ // sets the resolution fields in the output file
+ if (image->HasOption(wxIMAGE_OPTION_RESOLUTION))
+ {
+ cinfo.X_density =
+ cinfo.Y_density = image->GetOptionInt(wxIMAGE_OPTION_RESOLUTION);
+ }
+
+ // sets the resolution unit field in the output file
+ // wxIMAGE_RESOLUTION_INCHES for inches
+ // wxIMAGE_RESOLUTION_CM for centimeters
+ if (image->HasOption(wxIMAGE_OPTION_RESOLUTIONUNIT))
+ {
+ cinfo.density_unit = image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT);
+ }
+
jpeg_start_compress(&cinfo, TRUE);
stride = cinfo.image_width * 3; /* JSAMPLEs per row in image_buffer */
{
unsigned char hdr[2];
- stream.Read(hdr, 2);
- stream.SeekI(-2, wxFromCurrent);
- return (hdr[0] == 0xFF && hdr[1] == 0xD8);
+ if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
+ return FALSE;
+
+ return hdr[0] == 0xFF && hdr[1] == 0xD8;
}
#endif // wxUSE_STREAMS
projects / wxWidgets.git / blobdiff