src/msw/gdiimage.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        msw/gdiimage.cpp
// Purpose:     wxGDIImage implementation
// Author:      Vadim Zeitlin
// Modified by:
// Created:     20.11.99
// RCS-ID:      $Id$
// Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence:     wxWindows license
///////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#ifdef __GNUG__
    #pragma implementation "gdiimage.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/string.h"
    #include "wx/log.h"
#endif // WX_PRECOMP

#include "wx/msw/private.h"

#include "wx/app.h"

#include "wx/msw/dib.h"
#include "wx/msw/bitmap.h"
#include "wx/msw/gdiimage.h"
#include "wx/bitmap.h"

#ifdef __WIN16__
#   include "wx/msw/curico.h"
#endif // __WIN16__

// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

// all image handlers are declared/defined in this file because the outside
// world doesn't have to know about them (but only about wxBITMAP_TYPE_XXX ids)

class WXDLLEXPORT wxBMPFileHandler : public wxBitmapHandler
{
public:
    wxBMPFileHandler() : wxBitmapHandler(_T("Windows bitmap file"), _T("bmp"),
                                         wxBITMAP_TYPE_BMP)
    {
    }

    virtual bool LoadFile(wxBitmap *bitmap,
                          const wxString& name, long flags,
                          int desiredWidth, int desiredHeight);
    virtual bool SaveFile(wxBitmap *bitmap,
                          const wxString& name, int type,
                          const wxPalette *palette = NULL);

private:
    DECLARE_DYNAMIC_CLASS(wxBMPFileHandler)
};

class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
{
public:
    wxBMPResourceHandler() : wxBitmapHandler(_T("Windows bitmap resource"),
                                             wxEmptyString,
                                             wxBITMAP_TYPE_BMP_RESOURCE)
    {
    }

    virtual bool LoadFile(wxBitmap *bitmap,
                          const wxString& name, long flags,
                          int desiredWidth, int desiredHeight);

private:
    DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
};

class WXDLLEXPORT wxIconHandler : public wxGDIImageHandler
{
public:
    wxIconHandler(const wxString& name, const wxString& ext, long type)
        : wxGDIImageHandler(name, ext, type)
    {
    }

    // creating and saving icons is not supported
    virtual bool Create(wxGDIImage *WXUNUSED(image),
                        void *WXUNUSED(data),
                        long WXUNUSED(flags),
                        int WXUNUSED(width),
                        int WXUNUSED(height),
                        int WXUNUSED(depth) = 1)
    {
        return FALSE;
    }

    virtual bool Save(wxGDIImage *WXUNUSED(image),
                      const wxString& WXUNUSED(name),
                      int WXUNUSED(type))
    {
        return FALSE;
    }

    virtual bool Load(wxGDIImage *image,
                      const wxString& name,
                      long flags,
                      int desiredWidth, int desiredHeight)
    {
        wxIcon *icon = wxDynamicCast(image, wxIcon);
        wxCHECK_MSG( icon, FALSE, _T("wxIconHandler only works with icons") );

        return LoadIcon(icon, name, flags, desiredWidth, desiredHeight);
    }

protected:
    virtual bool LoadIcon(wxIcon *icon,
                          const wxString& name, long flags,
                          int desiredWidth = -1, int desiredHeight = -1) = 0;
};

class WXDLLEXPORT wxICOFileHandler : public wxIconHandler
{
public:
    wxICOFileHandler() : wxIconHandler(_T("ICO icon file"),
                                       _T("ico"),
                                       wxBITMAP_TYPE_ICO)
    {
    }

    virtual bool LoadIcon(wxIcon *icon,
                          const wxString& name, long flags,
                          int desiredWidth = -1, int desiredHeight = -1);

private:
    DECLARE_DYNAMIC_CLASS(wxICOFileHandler)
};

class WXDLLEXPORT wxICOResourceHandler: public wxIconHandler
{
public:
    wxICOResourceHandler() : wxIconHandler(_T("ICO resource"),
                                           _T("ico"),
                                           wxBITMAP_TYPE_ICO_RESOURCE)
    {
    }

    virtual bool LoadIcon(wxIcon *icon,
                          const wxString& name, long flags,
                          int desiredWidth = -1, int desiredHeight = -1);

private:
    DECLARE_DYNAMIC_CLASS(wxICOResourceHandler)
};

// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------

    IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler)
    IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)
    IMPLEMENT_DYNAMIC_CLASS(wxICOFileHandler, wxGDIImageHandler)
    IMPLEMENT_DYNAMIC_CLASS(wxICOResourceHandler, wxGDIImageHandler)

// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------

static wxSize GetHiconSize(HICON hicon);

// ============================================================================
// implementation
// ============================================================================

wxList wxGDIImage::ms_handlers;

// ----------------------------------------------------------------------------
// wxGDIImage functions forwarded to wxGDIImageRefData
// ----------------------------------------------------------------------------

bool wxGDIImage::FreeResource(bool WXUNUSED(force))
{
    if ( !IsNull() )
    {
        GetGDIImageData()->Free();
        GetGDIImageData()->m_handle = 0;
    }

    return TRUE;
}

WXHANDLE wxGDIImage::GetResourceHandle()
{
    return GetHandle();
}

// ----------------------------------------------------------------------------
// wxGDIImage handler stuff
// ----------------------------------------------------------------------------

void wxGDIImage::AddHandler(wxGDIImageHandler *handler)
{
    ms_handlers.Append(handler);
}

void wxGDIImage::InsertHandler(wxGDIImageHandler *handler)
{
    ms_handlers.Insert(handler);
}

bool wxGDIImage::RemoveHandler(const wxString& name)
{
    wxGDIImageHandler *handler = FindHandler(name);
    if ( handler )
    {
        ms_handlers.DeleteObject(handler);
        return TRUE;
    }
    else
        return FALSE;
}

wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& name)
{
    wxNode *node = ms_handlers.First();
    while ( node )
    {
        wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
        if ( handler->GetName() == name )
            return handler;
        node = node->Next();
    }

    return NULL;
}

wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& extension,
                                           long type)
{
    wxNode *node = ms_handlers.First();
    while ( node )
    {
        wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
        if ( (handler->GetExtension() = extension) &&
             (type == -1 || handler->GetType() == type) )
        {
            return handler;
        }

        node = node->Next();
    }
    return NULL;
}

wxGDIImageHandler *wxGDIImage::FindHandler(long type)
{
    wxNode *node = ms_handlers.First();
    while ( node )
    {
        wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
        if ( handler->GetType() == type )
            return handler;

        node = node->Next();
    }

    return NULL;
}

void wxGDIImage::CleanUpHandlers()
{
    wxNode *node = ms_handlers.First();
    while ( node )
    {
        wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
        wxNode *next = node->Next();
        delete handler;
        delete node;
        node = next;
    }
}

void wxGDIImage::InitStandardHandlers()
{
    AddHandler(new wxBMPResourceHandler);
    AddHandler(new wxBMPFileHandler);
    AddHandler(new wxICOResourceHandler);
    AddHandler(new wxICOFileHandler);
}

// ----------------------------------------------------------------------------
// wxBitmap handlers
// ----------------------------------------------------------------------------

bool wxBMPResourceHandler::LoadFile(wxBitmap *bitmap,
                                    const wxString& name, long WXUNUSED(flags),
                                    int WXUNUSED(desiredWidth),
                                    int WXUNUSED(desiredHeight))
{
    // TODO: load colourmap.
    bitmap->SetHBITMAP((WXHBITMAP)::LoadBitmap(wxGetInstance(), name));

    wxBitmapRefData *data = bitmap->GetBitmapData();
    if ( bitmap->Ok() )
    {
        BITMAP bm;
        if ( !::GetObject(GetHbitmapOf(*bitmap), sizeof(BITMAP), (LPSTR) &bm) )
        {
            wxLogLastError(wxT("GetObject(HBITMAP)"));
        }

        data->m_width = bm.bmWidth;
        data->m_height = bm.bmHeight;
        data->m_depth = bm.bmBitsPixel;
    }
    else
    {
        // it's probably not found
        wxLogError(wxT("Can't load bitmap '%s' from resources! Check .rc file."),
                   name.c_str());
    }

    return bitmap->Ok();
}

bool wxBMPFileHandler::LoadFile(wxBitmap *bitmap,
                                const wxString& name, long WXUNUSED(flags),
                                int WXUNUSED(desiredWidth),
                                int WXUNUSED(desiredHeight))
{
#if wxUSE_IMAGE_LOADING_IN_MSW
    wxPalette *palette = NULL;
    bool success = wxLoadIntoBitmap(WXSTRINGCAST name, bitmap, &palette) != 0;
    if ( success && palette )
    {
        bitmap->SetPalette(*palette);
    }

    // it was copied by the bitmap if it was loaded successfully
    delete palette;

    return success;
#else
    return FALSE;
#endif
}

bool wxBMPFileHandler::SaveFile(wxBitmap *bitmap,
                                const wxString& name,
                                int WXUNUSED(type),
                                const wxPalette *pal)
{
#if wxUSE_IMAGE_LOADING_IN_MSW
    wxPalette *actualPalette = (wxPalette *)pal;
    if ( !actualPalette )
        actualPalette = bitmap->GetPalette();
    return wxSaveBitmap(WXSTRINGCAST name, bitmap, actualPalette) != 0;
#else
    return FALSE;
#endif
}

// ----------------------------------------------------------------------------
// wxIcon handlers
// ----------------------------------------------------------------------------

bool wxICOFileHandler::LoadIcon(wxIcon *icon,
                                const wxString& name,
                                long WXUNUSED(flags),
                                int desiredWidth, int desiredHeight)
{
#if wxUSE_RESOURCE_LOADING_IN_MSW
    icon->UnRef();

    // actual size
    wxSize size;

#ifdef __WIN32__
    HICON hicon = NULL;

    // were we asked for a large icon?
    if ( desiredWidth == ::GetSystemMetrics(SM_CXICON) &&
         desiredHeight == ::GetSystemMetrics(SM_CYICON) )
    {
        // get the first large icon from file
        if ( !::ExtractIconEx(name, 0, &hicon, NULL, 1) )
        {
            // it is not an error, but it might still be useful to be informed
            // about it optionally
            wxLogTrace(_T("iconload"),
                       _T("No large icons found in the file '%s'."),
                       name.c_str());
        }
    }
    else if ( desiredWidth == ::GetSystemMetrics(SM_CXSMICON) &&
              desiredHeight == ::GetSystemMetrics(SM_CYSMICON) )
    {
        // get the first small icon from file
        if ( !::ExtractIconEx(name, 0, NULL, &hicon, 1) )
        {
            wxLogTrace(_T("iconload"),
                       _T("No small icons found in the file '%s'."),
                       name.c_str());
        }
    }
    //else: not standard size, load below

    if ( !hicon )
    {
        // take any (the first one) icon from the file by default
        hicon = ::ExtractIcon(wxGetInstance(), name, 0 /* first */);
    }

    if ( !hicon )
    {
        wxLogSysError(_T("Failed to load icon from the file '%s'"),
                      name.c_str());

        return FALSE;
    }

    size = GetHiconSize(hicon);
#else // Win16
    HICON hicon = ReadIconFile((wxChar *)name.c_str(),
                               wxGetInstance(),
                               &size.x, &size.y);
#endif // Win32/Win16

    if ( (desiredWidth != -1 && desiredWidth != size.x) ||
         (desiredHeight != -1 && desiredHeight != size.y) )
    {
        wxLogTrace(_T("iconload"),
                   _T("Returning FALSE from wxICOFileHandler::Load because of the size mismatch: actual (%d, %d), requested (%d, %d)"),
                   size.x, size.y,
                   desiredWidth, desiredHeight);

        ::DestroyIcon(hicon);

        return FALSE;
    }

    icon->SetHICON((WXHICON)hicon);
    icon->SetSize(size.x, size.y);

    return icon->Ok();
#else
    return FALSE;
#endif
}

bool wxICOResourceHandler::LoadIcon(wxIcon *icon,
                                    const wxString& name,
                                    long WXUNUSED(flags),
                                    int desiredWidth, int desiredHeight)
{
    HICON hicon;

#if defined(__WIN32__) && !defined(__SC__)
    if ( desiredWidth != -1 && desiredHeight != -1 )
    {
        hicon = (HICON)::LoadImage(wxGetInstance(), name, IMAGE_ICON,
                                    desiredWidth, desiredHeight,
                                    LR_DEFAULTCOLOR);
    }
    else
#endif // Win32
    {
        hicon = ::LoadIcon(wxGetInstance(), name);
    }

    wxSize size = GetHiconSize(hicon);
    icon->SetSize(size.x, size.y);

    // Override the found values with desired values
    if ( desiredWidth > -1 && desiredHeight > -1 )
    {
        icon->SetSize(desiredWidth, desiredHeight);
    }

    icon->SetHICON((WXHICON)hicon);

    return icon->Ok();
}

// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------

static wxSize GetHiconSize(HICON hicon)
{
    wxSize size(32, 32);    // default

#ifdef __WIN32__
    // Win32s doesn't have GetIconInfo function...
    if ( hicon && wxGetOsVersion() != wxWIN32S )
    {
        ICONINFO info;
        if ( !::GetIconInfo(hicon, &info) )
        {
            wxLogLastError(wxT("GetIconInfo"));
        }
        else
        {
            HBITMAP hbmp = info.hbmMask;
            if ( hbmp )
            {
                BITMAP bm;
                if ( ::GetObject(hbmp, sizeof(BITMAP), (LPSTR) &bm) )
                {
                    size = wxSize(bm.bmWidth, bm.bmHeight);
                }

                ::DeleteObject(info.hbmMask);
            }
            if ( info.hbmColor )
                ::DeleteObject(info.hbmColor);
        }
    }
#endif

    return size;
}
Commit	Line	Data
	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: msw/gdiimage.cpp
	3	// Purpose: wxGDIImage implementation
	4	// Author: Vadim Zeitlin
	5	// Modified by:
	6	// Created: 20.11.99
	7	// RCS-ID: $Id$
	8	// Copyright: (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
	9	// Licence: wxWindows license
	10	///////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	#ifdef __GNUG__
	21	#pragma implementation "gdiimage.h"
	22	#endif
	23
	24	// For compilers that support precompilation, includes "wx.h".
	25	#include "wx/wxprec.h"
	26
	27	#ifdef __BORLANDC__
	28	#pragma hdrstop
	29	#endif
	30
	31	#ifndef WX_PRECOMP
	32	#include "wx/string.h"
	33	#include "wx/log.h"
	34	#endif // WX_PRECOMP
	35
	36	#include "wx/msw/private.h"
	37
	38	#include "wx/app.h"
	39
	40	#include "wx/msw/dib.h"
	41	#include "wx/msw/bitmap.h"
	42	#include "wx/msw/gdiimage.h"
	43	#include "wx/bitmap.h"
	44
	45	#ifdef __WIN16__
	46	# include "wx/msw/curico.h"
	47	#endif // __WIN16__
	48
	49	// ----------------------------------------------------------------------------
	50	// private classes
	51	// ----------------------------------------------------------------------------
	52
	53	// all image handlers are declared/defined in this file because the outside
	54	// world doesn't have to know about them (but only about wxBITMAP_TYPE_XXX ids)
	55
	56	class WXDLLEXPORT wxBMPFileHandler : public wxBitmapHandler
	57	{
	58	public:
	59	wxBMPFileHandler() : wxBitmapHandler(_T("Windows bitmap file"), _T("bmp"),
	60	wxBITMAP_TYPE_BMP)
	61	{
	62	}
	63
	64	virtual bool LoadFile(wxBitmap *bitmap,
	65	const wxString& name, long flags,
	66	int desiredWidth, int desiredHeight);
	67	virtual bool SaveFile(wxBitmap *bitmap,
	68	const wxString& name, int type,
	69	const wxPalette *palette = NULL);
	70
	71	private:
	72	DECLARE_DYNAMIC_CLASS(wxBMPFileHandler)
	73	};
	74
	75	class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
	76	{
	77	public:
	78	wxBMPResourceHandler() : wxBitmapHandler(_T("Windows bitmap resource"),
	79	wxEmptyString,
	80	wxBITMAP_TYPE_BMP_RESOURCE)
	81	{
	82	}
	83
	84	virtual bool LoadFile(wxBitmap *bitmap,
	85	const wxString& name, long flags,
	86	int desiredWidth, int desiredHeight);
	87
	88	private:
	89	DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
	90	};
	91
	92	class WXDLLEXPORT wxIconHandler : public wxGDIImageHandler
	93	{
	94	public:
	95	wxIconHandler(const wxString& name, const wxString& ext, long type)
	96	: wxGDIImageHandler(name, ext, type)
	97	{
	98	}
	99
	100	// creating and saving icons is not supported
	101	virtual bool Create(wxGDIImage *WXUNUSED(image),
	102	void *WXUNUSED(data),
	103	long WXUNUSED(flags),
	104	int WXUNUSED(width),
	105	int WXUNUSED(height),
	106	int WXUNUSED(depth) = 1)
	107	{
	108	return FALSE;
	109	}
	110
	111	virtual bool Save(wxGDIImage *WXUNUSED(image),
	112	const wxString& WXUNUSED(name),
	113	int WXUNUSED(type))
	114	{
	115	return FALSE;
	116	}
	117
	118	virtual bool Load(wxGDIImage *image,
	119	const wxString& name,
	120	long flags,
	121	int desiredWidth, int desiredHeight)
	122	{
	123	wxIcon *icon = wxDynamicCast(image, wxIcon);
	124	wxCHECK_MSG( icon, FALSE, _T("wxIconHandler only works with icons") );
	125
	126	return LoadIcon(icon, name, flags, desiredWidth, desiredHeight);
	127	}
	128
	129	protected:
	130	virtual bool LoadIcon(wxIcon *icon,
	131	const wxString& name, long flags,
	132	int desiredWidth = -1, int desiredHeight = -1) = 0;
	133	};
	134
	135	class WXDLLEXPORT wxICOFileHandler : public wxIconHandler
	136	{
	137	public:
	138	wxICOFileHandler() : wxIconHandler(_T("ICO icon file"),
	139	_T("ico"),
	140	wxBITMAP_TYPE_ICO)
	141	{
	142	}
	143
	144	virtual bool LoadIcon(wxIcon *icon,
	145	const wxString& name, long flags,
	146	int desiredWidth = -1, int desiredHeight = -1);
	147
	148	private:
	149	DECLARE_DYNAMIC_CLASS(wxICOFileHandler)
	150	};
	151
	152	class WXDLLEXPORT wxICOResourceHandler: public wxIconHandler
	153	{
	154	public:
	155	wxICOResourceHandler() : wxIconHandler(_T("ICO resource"),
	156	_T("ico"),
	157	wxBITMAP_TYPE_ICO_RESOURCE)
	158	{
	159	}
	160
	161	virtual bool LoadIcon(wxIcon *icon,
	162	const wxString& name, long flags,
	163	int desiredWidth = -1, int desiredHeight = -1);
	164
	165	private:
	166	DECLARE_DYNAMIC_CLASS(wxICOResourceHandler)
	167	};
	168
	169	// ----------------------------------------------------------------------------
	170	// wxWin macros
	171	// ----------------------------------------------------------------------------
	172
	173	IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler)
	174	IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)
	175	IMPLEMENT_DYNAMIC_CLASS(wxICOFileHandler, wxGDIImageHandler)
	176	IMPLEMENT_DYNAMIC_CLASS(wxICOResourceHandler, wxGDIImageHandler)
	177
	178	// ----------------------------------------------------------------------------
	179	// private functions
	180	// ----------------------------------------------------------------------------
	181
	182	static wxSize GetHiconSize(HICON hicon);
	183
	184	// ============================================================================
	185	// implementation
	186	// ============================================================================
	187
	188	wxList wxGDIImage::ms_handlers;
	189
	190	// ----------------------------------------------------------------------------
	191	// wxGDIImage functions forwarded to wxGDIImageRefData
	192	// ----------------------------------------------------------------------------
	193
	194	bool wxGDIImage::FreeResource(bool WXUNUSED(force))
	195	{
	196	if ( !IsNull() )
	197	{
	198	GetGDIImageData()->Free();
	199	GetGDIImageData()->m_handle = 0;
	200	}
	201
	202	return TRUE;
	203	}
	204
	205	WXHANDLE wxGDIImage::GetResourceHandle()
	206	{
	207	return GetHandle();
	208	}
	209
	210	// ----------------------------------------------------------------------------
	211	// wxGDIImage handler stuff
	212	// ----------------------------------------------------------------------------
	213
	214	void wxGDIImage::AddHandler(wxGDIImageHandler *handler)
	215	{
	216	ms_handlers.Append(handler);
	217	}
	218
	219	void wxGDIImage::InsertHandler(wxGDIImageHandler *handler)
	220	{
	221	ms_handlers.Insert(handler);
	222	}
	223
	224	bool wxGDIImage::RemoveHandler(const wxString& name)
	225	{
	226	wxGDIImageHandler *handler = FindHandler(name);
	227	if ( handler )
	228	{
	229	ms_handlers.DeleteObject(handler);
	230	return TRUE;
	231	}
	232	else
	233	return FALSE;
	234	}
	235
	236	wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& name)
	237	{
	238	wxNode *node = ms_handlers.First();
	239	while ( node )
	240	{
	241	wxGDIImageHandler handler = (wxGDIImageHandler )node->Data();
	242	if ( handler->GetName() == name )
	243	return handler;
	244	node = node->Next();
	245	}
	246
	247	return NULL;
	248	}
	249
	250	wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& extension,
	251	long type)
	252	{
	253	wxNode *node = ms_handlers.First();
	254	while ( node )
	255	{
	256	wxGDIImageHandler handler = (wxGDIImageHandler )node->Data();
	257	if ( (handler->GetExtension() = extension) &&
	258	(type == -1 \|\| handler->GetType() == type) )
	259	{
	260	return handler;
	261	}
	262
	263	node = node->Next();
	264	}
	265	return NULL;
	266	}
	267
	268	wxGDIImageHandler *wxGDIImage::FindHandler(long type)
	269	{
	270	wxNode *node = ms_handlers.First();
	271	while ( node )
	272	{
	273	wxGDIImageHandler handler = (wxGDIImageHandler )node->Data();
	274	if ( handler->GetType() == type )
	275	return handler;
	276
	277	node = node->Next();
	278	}
	279
	280	return NULL;
	281	}
	282
	283	void wxGDIImage::CleanUpHandlers()
	284	{
	285	wxNode *node = ms_handlers.First();
	286	while ( node )
	287	{
	288	wxGDIImageHandler handler = (wxGDIImageHandler )node->Data();
	289	wxNode *next = node->Next();
	290	delete handler;
	291	delete node;
	292	node = next;
	293	}
	294	}
	295
	296	void wxGDIImage::InitStandardHandlers()
	297	{
	298	AddHandler(new wxBMPResourceHandler);
	299	AddHandler(new wxBMPFileHandler);
	300	AddHandler(new wxICOResourceHandler);
	301	AddHandler(new wxICOFileHandler);
	302	}
	303
	304	// ----------------------------------------------------------------------------
	305	// wxBitmap handlers
	306	// ----------------------------------------------------------------------------
	307
	308	bool wxBMPResourceHandler::LoadFile(wxBitmap *bitmap,
	309	const wxString& name, long WXUNUSED(flags),
	310	int WXUNUSED(desiredWidth),
	311	int WXUNUSED(desiredHeight))
	312	{
	313	// TODO: load colourmap.
	314	bitmap->SetHBITMAP((WXHBITMAP)::LoadBitmap(wxGetInstance(), name));
	315
	316	wxBitmapRefData *data = bitmap->GetBitmapData();
	317	if ( bitmap->Ok() )
	318	{
	319	BITMAP bm;
	320	if ( !::GetObject(GetHbitmapOf(*bitmap), sizeof(BITMAP), (LPSTR) &bm) )
	321	{
	322	wxLogLastError(wxT("GetObject(HBITMAP)"));
	323	}
	324
	325	data->m_width = bm.bmWidth;
	326	data->m_height = bm.bmHeight;
	327	data->m_depth = bm.bmBitsPixel;
	328	}
	329	else
	330	{
	331	// it's probably not found
	332	wxLogError(wxT("Can't load bitmap '%s' from resources! Check .rc file."),
	333	name.c_str());
	334	}
	335
	336	return bitmap->Ok();
	337	}
	338
	339	bool wxBMPFileHandler::LoadFile(wxBitmap *bitmap,
	340	const wxString& name, long WXUNUSED(flags),
	341	int WXUNUSED(desiredWidth),
	342	int WXUNUSED(desiredHeight))
	343	{
	344	#if wxUSE_IMAGE_LOADING_IN_MSW
	345	wxPalette *palette = NULL;
	346	bool success = wxLoadIntoBitmap(WXSTRINGCAST name, bitmap, &palette) != 0;
	347	if ( success && palette )
	348	{
	349	bitmap->SetPalette(*palette);
	350	}
	351
	352	// it was copied by the bitmap if it was loaded successfully
	353	delete palette;
	354
	355	return success;
	356	#else
	357	return FALSE;
	358	#endif
	359	}
	360
	361	bool wxBMPFileHandler::SaveFile(wxBitmap *bitmap,
	362	const wxString& name,
	363	int WXUNUSED(type),
	364	const wxPalette *pal)
	365	{
	366	#if wxUSE_IMAGE_LOADING_IN_MSW
	367	wxPalette actualPalette = (wxPalette )pal;
	368	if ( !actualPalette )
	369	actualPalette = bitmap->GetPalette();
	370	return wxSaveBitmap(WXSTRINGCAST name, bitmap, actualPalette) != 0;
	371	#else
	372	return FALSE;
	373	#endif
	374	}
	375
	376	// ----------------------------------------------------------------------------
	377	// wxIcon handlers
	378	// ----------------------------------------------------------------------------
	379
	380	bool wxICOFileHandler::LoadIcon(wxIcon *icon,
	381	const wxString& name,
	382	long WXUNUSED(flags),
	383	int desiredWidth, int desiredHeight)
	384	{
	385	#if wxUSE_RESOURCE_LOADING_IN_MSW
	386	icon->UnRef();
	387
	388	// actual size
	389	wxSize size;
	390
	391	#ifdef __WIN32__
	392	HICON hicon = NULL;
	393
	394	// were we asked for a large icon?
	395	if ( desiredWidth == ::GetSystemMetrics(SM_CXICON) &&
	396	desiredHeight == ::GetSystemMetrics(SM_CYICON) )
	397	{
	398	// get the first large icon from file
	399	if ( !::ExtractIconEx(name, 0, &hicon, NULL, 1) )
	400	{
	401	// it is not an error, but it might still be useful to be informed
	402	// about it optionally
	403	wxLogTrace(_T("iconload"),
	404	_T("No large icons found in the file '%s'."),
	405	name.c_str());
	406	}
	407	}
	408	else if ( desiredWidth == ::GetSystemMetrics(SM_CXSMICON) &&
	409	desiredHeight == ::GetSystemMetrics(SM_CYSMICON) )
	410	{
	411	// get the first small icon from file
	412	if ( !::ExtractIconEx(name, 0, NULL, &hicon, 1) )
	413	{
	414	wxLogTrace(_T("iconload"),
	415	_T("No small icons found in the file '%s'."),
	416	name.c_str());
	417	}
	418	}
	419	//else: not standard size, load below
	420
	421	if ( !hicon )
	422	{
	423	// take any (the first one) icon from the file by default
	424	hicon = ::ExtractIcon(wxGetInstance(), name, 0 /* first */);
	425	}
	426
	427	if ( !hicon )
	428	{
	429	wxLogSysError(_T("Failed to load icon from the file '%s'"),
	430	name.c_str());
	431
	432	return FALSE;
	433	}
	434
	435	size = GetHiconSize(hicon);
	436	#else // Win16
	437	HICON hicon = ReadIconFile((wxChar *)name.c_str(),
	438	wxGetInstance(),
	439	&size.x, &size.y);
	440	#endif // Win32/Win16
	441
	442	if ( (desiredWidth != -1 && desiredWidth != size.x) \|\|
	443	(desiredHeight != -1 && desiredHeight != size.y) )
	444	{
	445	wxLogTrace(_T("iconload"),
	446	_T("Returning FALSE from wxICOFileHandler::Load because of the size mismatch: actual (%d, %d), requested (%d, %d)"),
	447	size.x, size.y,
	448	desiredWidth, desiredHeight);
	449
	450	::DestroyIcon(hicon);
	451
	452	return FALSE;
	453	}
	454
	455	icon->SetHICON((WXHICON)hicon);
	456	icon->SetSize(size.x, size.y);
	457
	458	return icon->Ok();
	459	#else
	460	return FALSE;
	461	#endif
	462	}
	463
	464	bool wxICOResourceHandler::LoadIcon(wxIcon *icon,
	465	const wxString& name,
	466	long WXUNUSED(flags),
	467	int desiredWidth, int desiredHeight)
	468	{
	469	HICON hicon;
	470
	471	#if defined(__WIN32__) && !defined(__SC__)
	472	if ( desiredWidth != -1 && desiredHeight != -1 )
	473	{
	474	hicon = (HICON)::LoadImage(wxGetInstance(), name, IMAGE_ICON,
	475	desiredWidth, desiredHeight,
	476	LR_DEFAULTCOLOR);
	477	}
	478	else
	479	#endif // Win32
	480	{
	481	hicon = ::LoadIcon(wxGetInstance(), name);
	482	}
	483
	484	wxSize size = GetHiconSize(hicon);
	485	icon->SetSize(size.x, size.y);
	486
	487	// Override the found values with desired values
	488	if ( desiredWidth > -1 && desiredHeight > -1 )
	489	{
	490	icon->SetSize(desiredWidth, desiredHeight);
	491	}
	492
	493	icon->SetHICON((WXHICON)hicon);
	494
	495	return icon->Ok();
	496	}
	497
	498	// ----------------------------------------------------------------------------
	499	// private functions
	500	// ----------------------------------------------------------------------------
	501
	502	static wxSize GetHiconSize(HICON hicon)
	503	{
	504	wxSize size(32, 32); // default
	505
	506	#ifdef __WIN32__
	507	// Win32s doesn't have GetIconInfo function...
	508	if ( hicon && wxGetOsVersion() != wxWIN32S )
	509	{
	510	ICONINFO info;
	511	if ( !::GetIconInfo(hicon, &info) )
	512	{
	513	wxLogLastError(wxT("GetIconInfo"));
	514	}
	515	else
	516	{
	517	HBITMAP hbmp = info.hbmMask;
	518	if ( hbmp )
	519	{
	520	BITMAP bm;
	521	if ( ::GetObject(hbmp, sizeof(BITMAP), (LPSTR) &bm) )
	522	{
	523	size = wxSize(bm.bmWidth, bm.bmHeight);
	524	}
	525
	526	::DeleteObject(info.hbmMask);
	527	}
	528	if ( info.hbmColor )
	529	::DeleteObject(info.hbmColor);
	530	}
	531	}
	532	#endif
	533
	534	return size;
	535	}