Don't create a bitmap with dimensions <= 0...

[wxWidgets.git] / wxPython / src / image.i

/////////////////////////////////////////////////////////////////////////////
// Name:        image.i
// Purpose:     SWIG interface file for wxImage, wxImageHandler, etc.
//
// Author:      Robin Dunn
//
// Created:     28-Apr-1999
// RCS-ID:      $Id$
// Copyright:   (c) 1998 by Total Control Software
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////


%module image

%{
#include "helpers.h"
#include <wx/image.h>
%}

//----------------------------------------------------------------------

%include typemaps.i
%include my_typemaps.i

// Import some definitions of other classes, etc.
%import _defs.i
%import misc.i
%import gdi.i

//---------------------------------------------------------------------------

class wxImageHandler : public wxObject {
public:
    // wxImageHandler();    Abstract Base Class
    wxString GetName();
    wxString GetExtension();
    long GetType();
    wxString GetMimeType();

    //bool LoadFile(wxImage* image, wxInputStream& stream);
    //bool SaveFile(wxImage* image, wxOutputStream& stream);

    void SetName(const wxString& name);
    void SetExtension(const wxString& extension);
    void SetType(long type);
    void SetMimeType(const wxString& mimetype);
};

//---------------------------------------------------------------------------

class wxPNGHandler : public wxImageHandler {
public:
    wxPNGHandler();
};


class wxJPEGHandler : public wxImageHandler {
public:
    wxJPEGHandler();
};


class wxBMPHandler : public wxImageHandler {
public:
    wxBMPHandler();
};


class wxGIFHandler : public wxImageHandler {
public:
    wxGIFHandler();
};

class wxPNMHandler : public wxImageHandler {
public:
    wxPNMHandler();
};

class wxPCXHandler : public wxImageHandler {
public:
    wxPCXHandler();
};

class wxTIFFHandler : public wxImageHandler {
public:
    wxTIFFHandler();
};


//---------------------------------------------------------------------------

class wxImage : public wxObject {
public:
    wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY );
    ~wxImage();

    wxBitmap ConvertToBitmap();
#ifdef __WXGTK__
    wxBitmap ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const;
#endif
    void Create( int width, int height );
    void Destroy();
    wxImage Scale( int width, int height );
    wxImage& Rescale(int width, int height);

    void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
    unsigned char GetRed( int x, int y );
    unsigned char GetGreen( int x, int y );
    unsigned char GetBlue( int x, int y );

    static bool CanRead( const wxString& name );
    bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY );
    %name(LoadMimeFile)bool LoadFile( const wxString& name, const wxString& mimetype );

    bool SaveFile( const wxString& name, int type );
    %name(SaveMimeFile)bool SaveFile( const wxString& name, const wxString& mimetype );

    bool Ok();
    int GetWidth();
    int GetHeight();

    wxImage GetSubImage(const wxRect& rect);
    wxImage Copy();
    void Paste( const wxImage &image, int x, int y );

    //unsigned char *GetData();
    //void SetData( unsigned char *data );

    %addmethods {
        PyObject* GetData() {
            unsigned char* data = self->GetData();
            int len = self->GetWidth() * self->GetHeight() * 3;
            return PyString_FromStringAndSize((char*)data, len);
        }

        void SetData(PyObject* data) {
            unsigned char* dataPtr;

            if (! PyString_Check(data)) {
                PyErr_SetString(PyExc_TypeError, "Expected string object");
                return /* NULL */ ;
            }

            size_t len = self->GetWidth() * self->GetHeight() * 3;
            dataPtr = (unsigned char*) malloc(len);
            memcpy(dataPtr, PyString_AsString(data), len);
            self->SetData(dataPtr);
        }
    }

    void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
    unsigned char GetMaskRed();
    unsigned char GetMaskGreen();
    unsigned char GetMaskBlue();
    void SetMask( bool mask = TRUE );
    bool HasMask();

    wxImage Rotate(double angle, const wxPoint & centre_of_rotation,
                   bool interpolating = TRUE, wxPoint * offset_after_rotation = NULL) const ;
    wxImage Rotate90( bool clockwise = TRUE ) ;
    wxImage Mirror( bool horizontally = TRUE ) ;

    void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
                  unsigned char r2, unsigned char g2, unsigned char b2 );

    unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 );
    // TODO: unsigned long ComputeHistogram( wxHashTable &h );

    static void AddHandler( wxImageHandler *handler );
    static void InsertHandler( wxImageHandler *handler );
    static bool RemoveHandler( const wxString& name );
};


// Alternate constructors
%new wxImage* wxEmptyImage(int width=0, int height=0);
%new wxImage* wxImageFromMime(const wxString& name, const wxString& mimetype);
%new wxImage* wxImageFromBitmap(const wxBitmap &bitmap);
%{
    wxImage* wxEmptyImage(int width=0, int height=0) {
        if (width == 0 && height == 0)
            return new wxImage;
        else
            return new wxImage(width, height);
    }

    wxImage* wxImageFromMime(const wxString& name, const wxString& mimetype) {
        return new wxImage(name, mimetype);
    }

    wxImage* wxImageFromBitmap(const wxBitmap &bitmap) {
        return new wxImage(bitmap);
    }
%}

void wxInitAllImageHandlers();


%readonly
%{
#if 0
%}

extern wxImage    wxNullImage;

%readwrite
%{
#endif
%}



//---------------------------------------------------------------------------
// This one is here to avoid circular imports

%new wxBitmap* wxBitmapFromImage(const wxImage& img, int depth=-1);

%{
    wxBitmap* wxBitmapFromImage(const wxImage& img, int depth=-1) {
        return new wxBitmap(img, depth);
    }

%}


//---------------------------------------------------------------------------