X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/649d13e837b25f7b948ccfae02b18131f3a0a743..8e7361ccbc66cbae4cc6fbc76151acc041b6594b:/src/common/image.cpp

diff --git a/src/common/image.cpp b/src/common/image.cpp
index 73f00d9f88..9d3502abf2 100644
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -31,6 +31,7 @@
 #include "wx/wfstream.h"
 #include "wx/intl.h"
 #include "wx/module.h"
+#include "wx/hash.h"
 
 // For memcpy
 #include <string.h>
@@ -63,6 +64,8 @@ public:
 #endif // wxUSE_PALETTE
     wxArrayString   m_optionNames;
     wxArrayString   m_optionValues;
+
+    DECLARE_NO_COPY_CLASS(wxImageRefData)
 };
 
 wxImageRefData::wxImageRefData()
@@ -131,6 +134,7 @@ wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index )
 #endif // wxUSE_STREAMS
 
 wxImage::wxImage( const wxImage& image )
+    : wxObject()
 {
     Ref(image);
 }
@@ -198,8 +202,8 @@ wxImage wxImage::Copy() const
 
     wxCHECK_MSG( data, image, wxT("unable to create image") );
 
-    if (M_IMGDATA->m_hasMask)
-        image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+    image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+    image.SetMask( M_IMGDATA->m_hasMask );
 
     memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
 
@@ -275,6 +279,14 @@ wxImage wxImage::Scale( int width, int height ) const
     }
 #endif
 
+    // In case this is a cursor, make sure the hotspot is scalled accordingly:
+    if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
+        image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
+                (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width);
+    if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
+        image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
+                (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)*height)/old_height);
+
     return image;
 }
 
@@ -723,12 +735,12 @@ int wxImage::GetHeight() const
 
 bool wxImage::FindFirstUnusedColour(
             unsigned char *r, unsigned char *g, unsigned char *b,
-            unsigned char startR, unsigned char startG, unsigned char startB)
+            unsigned char startR, unsigned char startG, unsigned char startB) const
 {
-    wxHashTable hTable;
+    wxImageHistogram histogram;
     unsigned long key;
    
-    ComputeHistogram( hTable );
+    ComputeHistogram(histogram);
     
     unsigned char r2 = startR;
     unsigned char g2 = startG;
@@ -736,7 +748,7 @@ bool wxImage::FindFirstUnusedColour(
     
     key = (r2 << 16) | (g2 << 8) | b2;
 
-    while ( (wxHNode *) hTable.Get(key) )
+    while ( histogram.find(key) != histogram.end() )
     {
         // color already used
         r2++;
@@ -930,12 +942,32 @@ bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int
 #endif // wxUSE_STREAMS
 }
 
-bool wxImage::SaveFile( const wxString& filename, int type )
+
+
+bool wxImage::SaveFile( const wxString& filename ) const
+{
+    wxString ext = filename.AfterLast('.').Lower();
+    
+    wxImageHandler * pHandler = FindHandler(ext, -1);
+    if (pHandler)
+    {
+        SaveFile(filename, pHandler->GetType());
+        return TRUE;
+    }
+
+    wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
+
+    return FALSE;
+}
+
+bool wxImage::SaveFile( const wxString& filename, int type ) const
 {
 #if wxUSE_STREAMS
+    ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
     wxFileOutputStream stream(filename);
 
-    if ( stream.LastError() == wxStream_NOERROR )
+    if ( stream.IsOk() )
     {
         wxBufferedOutputStream bstream( stream );
         return SaveFile(bstream, type);
@@ -945,12 +977,14 @@ bool wxImage::SaveFile( const wxString& filename, int type )
     return FALSE;
 }
 
-bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
+bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const
 {
 #if wxUSE_STREAMS
+    ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
     wxFileOutputStream stream(filename);
 
-    if ( stream.LastError() == wxStream_NOERROR )
+    if ( stream.IsOk() )
     {
         wxBufferedOutputStream bstream( stream );
         return SaveFile(bstream, mimetype);
@@ -974,17 +1008,18 @@ int wxImage::GetImageCount( const wxString &name, long type )
 {
 #if wxUSE_STREAMS
   wxFileInputStream stream(name);
-  return GetImageCount(stream, type);
-#else
-  return 0;
+  if (stream.Ok())
+      return GetImageCount(stream, type);
 #endif
+
+  return 0;
 }
 
 #if wxUSE_STREAMS
 
 bool wxImage::CanRead( wxInputStream &stream )
 {
-    wxList &list=GetHandlers();
+    const wxList& list = GetHandlers();
 
     for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
     {
@@ -1061,7 +1096,7 @@ bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
 
     handler = FindHandler(type);
 
-    if (handler == NULL)
+    if (handler == 0)
     {
         wxLogWarning( _("No image handler for type %d defined."), type );
 
@@ -1079,7 +1114,7 @@ bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int ind
 
     wxImageHandler *handler = FindHandlerMime(mimetype);
 
-    if (handler == NULL)
+    if (handler == 0)
     {
         wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
 
@@ -1089,36 +1124,36 @@ bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int ind
     return handler->LoadFile( this, stream, TRUE/*verbose*/, index );
 }
 
-bool wxImage::SaveFile( wxOutputStream& stream, int type )
+bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
 {
     wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
 
     wxImageHandler *handler = FindHandler(type);
 
-    if (handler == NULL)
+    if (handler == 0)
     {
         wxLogWarning( _("No image handler for type %d defined."), type );
 
         return FALSE;
     }
 
-    return handler->SaveFile( this, stream );
+    return handler->SaveFile( (wxImage*)this, stream );
 }
 
-bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype )
+bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const
 {
     wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
 
     wxImageHandler *handler = FindHandlerMime(mimetype);
 
-    if (handler == NULL)
+    if (handler == 0)
     {
         wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
 
         return FALSE;
     }
 
-    return handler->SaveFile( this, stream );
+    return handler->SaveFile( (wxImage*)this, stream );
 }
 #endif // wxUSE_STREAMS
 
@@ -1127,7 +1162,23 @@ void wxImage::AddHandler( wxImageHandler *handler )
     // make sure that the memory will be freed at the program end
     sm_handlers.DeleteContents(TRUE);
 
-    sm_handlers.Append( handler );
+    // Check for an existing handler of the type being added.
+    if (FindHandler( handler->GetType() ) == 0)
+    {
+        sm_handlers.Append( handler );
+    }
+    else
+    {
+        // This is not documented behaviour, merely the simplest 'fix'
+        // for preventing duplicate additions.  If someone ever has
+        // a good reason to add and remove duplicate handlers (and they
+        // may) we should probably refcount the duplicates.
+        //   also an issue in InsertHandler below.
+
+        wxLogDebug( _T("Adding duplicate image handler for '%s'"),
+                    handler->GetName().c_str() );
+        delete handler;
+    }
 }
 
 void wxImage::InsertHandler( wxImageHandler *handler )
@@ -1135,7 +1186,18 @@ void wxImage::InsertHandler( wxImageHandler *handler )
     // make sure that the memory will be freed at the program end
     sm_handlers.DeleteContents(TRUE);
 
-    sm_handlers.Insert( handler );
+    // Check for an existing handler of the type being added.
+    if (FindHandler( handler->GetType() ) == 0)
+    {
+        sm_handlers.Insert( handler );
+    }
+    else
+    {
+        // see AddHandler for additional comments.
+        wxLogDebug( _T("Inserting duplicate image handler for '%s'"),
+                    handler->GetName().c_str() );
+        delete handler;
+    }
 }
 
 bool wxImage::RemoveHandler( const wxString& name )
@@ -1152,70 +1214,69 @@ bool wxImage::RemoveHandler( const wxString& name )
 
 wxImageHandler *wxImage::FindHandler( const wxString& name )
 {
-    wxNode *node = sm_handlers.First();
+    wxNode *node = sm_handlers.GetFirst();
     while (node)
     {
-        wxImageHandler *handler = (wxImageHandler*)node->Data();
+        wxImageHandler *handler = (wxImageHandler*)node->GetData();
         if (handler->GetName().Cmp(name) == 0) return handler;
 
-        node = node->Next();
+        node = node->GetNext();
     }
-    return (wxImageHandler *)NULL;
+    return 0;
 }
 
 wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
 {
-    wxNode *node = sm_handlers.First();
+    wxNode *node = sm_handlers.GetFirst();
     while (node)
     {
-        wxImageHandler *handler = (wxImageHandler*)node->Data();
+        wxImageHandler *handler = (wxImageHandler*)node->GetData();
         if ( (handler->GetExtension().Cmp(extension) == 0) &&
             (bitmapType == -1 || handler->GetType() == bitmapType) )
             return handler;
-        node = node->Next();
+        node = node->GetNext();
     }
-    return (wxImageHandler*)NULL;
+    return 0;
 }
 
 wxImageHandler *wxImage::FindHandler( long bitmapType )
 {
-    wxNode *node = sm_handlers.First();
+    wxNode *node = sm_handlers.GetFirst();
     while (node)
     {
-        wxImageHandler *handler = (wxImageHandler *)node->Data();
+        wxImageHandler *handler = (wxImageHandler *)node->GetData();
         if (handler->GetType() == bitmapType) return handler;
-        node = node->Next();
+        node = node->GetNext();
     }
-    return NULL;
+    return 0;
 }
 
 wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
 {
-    wxNode *node = sm_handlers.First();
+    wxNode *node = sm_handlers.GetFirst();
     while (node)
     {
-        wxImageHandler *handler = (wxImageHandler *)node->Data();
+        wxImageHandler *handler = (wxImageHandler *)node->GetData();
         if (handler->GetMimeType().IsSameAs(mimetype, FALSE)) return handler;
-        node = node->Next();
+        node = node->GetNext();
     }
-    return NULL;
+    return 0;
 }
 
 void wxImage::InitStandardHandlers()
 {
+#if wxUSE_STREAMS
     AddHandler(new wxBMPHandler);
-#if wxUSE_XPM && !defined(__WXGTK__) && !defined(__WXMOTIF__)
-    AddHandler(new wxXPMHandler);
-#endif
+#endif // wxUSE_STREAMS
 }
 
 void wxImage::CleanUpHandlers()
 {
-    wxNode *node = sm_handlers.First();
+    wxNode *node = sm_handlers.GetFirst();
     while (node)
     {
-        wxImageHandler *handler = (wxImageHandler *)node->Data();
-        wxNode *next = node->Next();
+        wxImageHandler *handler = (wxImageHandler *)node->GetData();
+        wxNode *next = node->GetNext();
         delete handler;
         delete node;
         node = next;
@@ -1252,12 +1313,32 @@ bool wxImageHandler::CanRead( const wxString& name )
         return CanRead(stream);
     }
 
-    else {
-        wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
+    wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
+
+    return FALSE;
+}
+
+bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
+{
+    off_t posOld = stream.TellI();
+    if ( posOld == wxInvalidOffset )
+    {
+        // can't test unseekable stream
+        return FALSE;
+    }
+
+    bool ok = DoCanRead(stream);
+
+    // restore the old position to be able to test other formats and so on
+    if ( stream.SeekI(posOld) == wxInvalidOffset )
+    {
+        wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!"));
 
+        // reading would fail anyhow as we're not at the right position
         return FALSE;
     }
-//    return FALSE;
+
+    return ok;
 }
 
 #endif // wxUSE_STREAMS
@@ -1265,10 +1346,10 @@ bool wxImageHandler::CanRead( const wxString& name )
 
 
 //-----------------------------------------------------------------------------
-// wxBitmap convertion routines
+// Deprecated wxBitmap conversion routines
 //-----------------------------------------------------------------------------
 
-#if wxUSE_GUI
+#if WXWIN_COMPATIBILITY_2_2 && wxUSE_GUI
 
 #ifdef __WXGTK__
 wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const
@@ -1290,24 +1371,7 @@ wxImage::wxImage( const wxBitmap &bitmap )
     *this = bitmap.ConvertToImage();
 }
 
-#endif
-
-
-
-// A module to allow wxImage initialization/cleanup
-// without calling these functions from app.cpp or from
-// the user's application.
-
-class wxImageModule: public wxModule
-{
-DECLARE_DYNAMIC_CLASS(wxImageModule)
-public:
-    wxImageModule() {}
-    bool OnInit() { wxImage::InitStandardHandlers(); return TRUE; };
-    void OnExit() { wxImage::CleanUpHandlers(); };
-};
-
-IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
+#endif // WXWIN_COMPATIBILITY_2_2 && wxUSE_GUI
 
 
 //-----------------------------------------------------------------------------
@@ -1319,7 +1383,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
 // less, in this case it would be invoked as CountColours(256)). Default
 // value for stopafter is -1 (don't care).
 //
-unsigned long wxImage::CountColours( unsigned long stopafter )
+unsigned long wxImage::CountColours( unsigned long stopafter ) const
 {
     wxHashTable h;
     wxObject dummy;
@@ -1349,19 +1413,13 @@ unsigned long wxImage::CountColours( unsigned long stopafter )
 }
 
 
-// GRG, Dic/99
-// Computes the histogram of the image and fills a hash table, indexed
-// with integer keys built as 0xRRGGBB, containing wxHNode objects. Each
-// wxHNode contains an 'index' (useful to build a palette with the image
-// colours) and a 'value', which is the number of pixels in the image with
-// that colour.
-//
-unsigned long wxImage::ComputeHistogram( wxHashTable &h )
+unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const
 {
     unsigned char r, g, b;
     unsigned char *p;
     unsigned long size, nentries, key;
-    wxHNode *hnode;
+
+    h.clear();
 
     p = GetData();
     size = GetWidth() * GetHeight();
@@ -1374,18 +1432,9 @@ unsigned long wxImage::ComputeHistogram( wxHashTable &h )
         b = *(p++);
         key = (r << 16) | (g << 8) | b;
 
-        hnode = (wxHNode *) h.Get(key);
-
-        if (hnode)
-            hnode->value++;
-        else
-        {
-            hnode = new wxHNode();
-            hnode->index = nentries++;
-            hnode->value = 1;
-
-            h.Put(key, (wxObject *)hnode);
-        }
+        wxImageHistogramEntry& entry = h[key];
+        if ( entry.value++ == 0 )
+            entry.index = nentries++;
     }
 
     return nentries;
@@ -1649,4 +1698,24 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
     return rotated;
 }
 
+
+
+
+
+// A module to allow wxImage initialization/cleanup
+// without calling these functions from app.cpp or from
+// the user's application.
+
+class wxImageModule: public wxModule
+{
+DECLARE_DYNAMIC_CLASS(wxImageModule)
+public:
+    wxImageModule() {}
+    bool OnInit() { wxImage::InitStandardHandlers(); return TRUE; };
+    void OnExit() { wxImage::CleanUpHandlers(); };
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
+
+
 #endif // wxUSE_IMAGE