always properly check if SeekI() calls succeded; this makes CanRead() functions of...

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

diff --git a/src/common/imagtiff.cpp b/src/common/imagtiff.cpp
index 6a2d5b445a4fa1112da51995b9a4b694a2e7a2ea..799d8749b68f8d43ae654804e0b832115fcccb4a 100644 (file)
--- a/src/common/imagtiff.cpp
+++ b/src/common/imagtiff.cpp
@@ -7,6 +7,14 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -24,10 +32,14 @@
     #include "wx/intl.h"
     #include "wx/bitmap.h"
     #include "wx/module.h"
+    #include "wx/wxcrtvararg.h"
 #endif
 
 extern "C"
 {
+#ifdef __DMC__
+    #include "tif_config.h"
+#endif
     #include "tiff.h"
     #include "tiffio.h"
 }
@@ -42,12 +54,66 @@ extern "C"
     #endif
 #endif
 
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// TIFF library error/warning handlers
+// ----------------------------------------------------------------------------
+
+static wxString
+FormatTiffMessage(const char *module, const char *fmt, va_list ap)
+{
+    char buf[512];
+    if ( wxCRT_VsnprintfA(buf, WXSIZEOF(buf), fmt, ap) <= 0 )
+    {
+        // this isn't supposed to happen, but if it does, it's better
+        // than nothing
+        strcpy(buf, "Incorrectly formatted TIFF message");
+    }
+    buf[WXSIZEOF(buf)-1] = 0; // make sure it is always NULL-terminated
+
+    wxString msg(buf);
+    if ( module )
+        msg += wxString::Format(_(" (in module \"%s\")"), module);
+
+    return msg;
+}
+
+extern "C"
+{
+
+static void
+TIFFwxWarningHandler(const char* module, const char *fmt, va_list ap)
+{
+    wxLogWarning("%s", FormatTiffMessage(module, fmt, ap));
+}
+
+static void
+TIFFwxErrorHandler(const char* module, const char *fmt, va_list ap)
+{
+    wxLogError("%s", FormatTiffMessage(module, fmt, ap));
+}
+
+} // extern "C"
+
 //-----------------------------------------------------------------------------
 // wxTIFFHandler
 //-----------------------------------------------------------------------------
 
 IMPLEMENT_DYNAMIC_CLASS(wxTIFFHandler,wxImageHandler)
 
+wxTIFFHandler::wxTIFFHandler()
+{
+    m_name = wxT("TIFF file");
+    m_extension = wxT("tif");
+    m_type = wxBITMAP_TYPE_TIF;
+    m_mime = wxT("image/tiff");
+    TIFFSetWarningHandler((TIFFErrorHandler) TIFFwxWarningHandler);
+    TIFFSetErrorHandler((TIFFErrorHandler) TIFFwxErrorHandler);
+}
+
 #if wxUSE_STREAMS
 
 // helper to translate our, possibly 64 bit, wxFileOffset to TIFF, always 32
@@ -165,38 +231,6 @@ wxTIFFUnmapProc(thandle_t WXUNUSED(handle),
 {
 }
 
-static void
-TIFFwxWarningHandler(const char* module,
-                     const char* WXUNUSED_IN_UNICODE(fmt),
-                     va_list WXUNUSED_IN_UNICODE(ap))
-{
-    if (module != NULL)
-        wxLogWarning(_("tiff module: %s"), wxString::FromAscii(module).c_str());
-
-    // FIXME: this is not terrible informative but better than crashing!
-#if wxUSE_UNICODE
-    wxLogWarning(_("TIFF library warning."));
-#else
-    wxVLogWarning(fmt, ap);
-#endif
-}
-
-static void
-TIFFwxErrorHandler(const char* module,
-                   const char* WXUNUSED_IN_UNICODE(fmt),
-                   va_list WXUNUSED_IN_UNICODE(ap))
-{
-    if (module != NULL)
-        wxLogError(_("tiff module: %s"), wxString::FromAscii(module).c_str());
-
-    // FIXME: as above
-#if wxUSE_UNICODE
-    wxLogError(_("TIFF library error."));
-#else
-    wxVLogError(fmt, ap);
-#endif
-}
-
 } // extern "C"
 
 TIFF*
@@ -223,16 +257,6 @@ TIFFwxOpen(wxOutputStream &stream, const char* name, const char* mode)
     return tif;
 }
 
-wxTIFFHandler::wxTIFFHandler()
-{
-    m_name = wxT("TIFF file");
-    m_extension = wxT("tif");
-    m_type = wxBITMAP_TYPE_TIF;
-    m_mime = wxT("image/tiff");
-    TIFFSetWarningHandler((TIFFErrorHandler) TIFFwxWarningHandler);
-    TIFFSetErrorHandler((TIFFErrorHandler) TIFFwxErrorHandler);
-}
-
 bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int index )
 {
     if (index == -1)
@@ -344,6 +368,43 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos
             alpha -= 2*w;
     }
 
+    // set the image resolution if it's available
+    uint16 tiffRes;
+    if ( TIFFGetField(tif, TIFFTAG_RESOLUTIONUNIT, &tiffRes) )
+    {
+        wxImageResolution res;
+        switch ( tiffRes )
+        {
+            default:
+                wxLogWarning(_("Unknown TIFF resolution unit %d ignored"),
+                             tiffRes);
+                // fall through
+
+            case RESUNIT_NONE:
+                res = wxIMAGE_RESOLUTION_NONE;
+                break;
+
+            case RESUNIT_INCH:
+                res = wxIMAGE_RESOLUTION_INCHES;
+                break;
+
+            case RESUNIT_CENTIMETER:
+                res = wxIMAGE_RESOLUTION_CM;
+                break;
+        }
+
+        if ( res != wxIMAGE_RESOLUTION_NONE )
+        {
+            float xres, yres;
+            if ( TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres) )
+                image->SetOption(wxIMAGE_OPTION_RESOLUTIONX, wxRound(xres));
+
+            if ( TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres) )
+                image->SetOption(wxIMAGE_OPTION_RESOLUTIONY, wxRound(yres));
+        }
+    }
+
+
     _TIFFfree( raster );
 
     TIFFClose( tif );
@@ -386,22 +447,44 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
     TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
     TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
 
-    if ( image->HasOption(wxIMAGE_OPTION_RESOLUTIONX) &&
-            image->HasOption(wxIMAGE_OPTION_RESOLUTIONY) )
+    // save the image resolution if we have it
+    int xres, yres;
+    const wxImageResolution res = GetResolutionFromOptions(*image, &xres, &yres);
+    uint16 tiffRes;
+    switch ( res )
     {
-        TIFFSetField(tif, TIFFTAG_XRESOLUTION,
-                        (float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX));
-        TIFFSetField(tif, TIFFTAG_YRESOLUTION,
-                        (float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY));
+        default:
+            wxFAIL_MSG( _T("unknown image resolution units") );
+            // fall through
+
+        case wxIMAGE_RESOLUTION_NONE:
+            tiffRes = RESUNIT_NONE;
+            break;
+
+        case wxIMAGE_RESOLUTION_INCHES:
+            tiffRes = RESUNIT_INCH;
+            break;
+
+        case wxIMAGE_RESOLUTION_CM:
+            tiffRes = RESUNIT_CENTIMETER;
+            break;
     }
 
+    if ( tiffRes != RESUNIT_NONE )
+    {
+        TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, tiffRes);
+        TIFFSetField(tif, TIFFTAG_XRESOLUTION, (float)xres);
+        TIFFSetField(tif, TIFFTAG_YRESOLUTION, (float)yres);
+    }
+
+
     int spp = image->GetOptionInt(wxIMAGE_OPTION_SAMPLESPERPIXEL);
     if ( !spp )
         spp = 3;
 
     int bpp = image->GetOptionInt(wxIMAGE_OPTION_BITSPERSAMPLE);
     if ( !bpp )
-        bpp=8;
+        bpp = 8;
 
     int compression = image->GetOptionInt(wxIMAGE_OPTION_COMPRESSION);
     if ( !compression )