src/common/imagtiff.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/common/imagtiff.cpp
// Purpose:     wxImage TIFF handler
// Author:      Robert Roebling
// RCS-ID:      $Id$
// Copyright:   (c) Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include "wx/defs.h"

#if wxUSE_IMAGE && wxUSE_LIBTIFF

#include "wx/imagtiff.h"
#include "wx/bitmap.h"
#include "wx/debug.h"
#include "wx/log.h"
#include "wx/app.h"
extern "C"
{
    #include "tiff.h"
    #include "tiffio.h"
}
#include "wx/filefn.h"
#include "wx/wfstream.h"
#include "wx/intl.h"
#include "wx/module.h"

#ifndef TIFFLINKAGEMODE
  #define TIFFLINKAGEMODE LINKAGEMODE
#endif

//-----------------------------------------------------------------------------
// wxTIFFHandler
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxTIFFHandler,wxImageHandler)

#if wxUSE_STREAMS

// helper to translate our, possibly 64 bit, wxFileOffset to TIFF, always 32
// bit, toff_t
static toff_t wxFileOffsetToTIFF(wxFileOffset ofs)
{
    if ( ofs == wxInvalidOffset )
        return (toff_t)-1;

    toff_t tofs = wx_truncate_cast(toff_t, ofs);
    wxCHECK_MSG( (wxFileOffset)tofs == ofs, (toff_t)-1,
                    _T("TIFF library doesn't support large files") );

    return tofs;
}

// another helper to convert standard seek mode to our
static wxSeekMode wxSeekModeFromTIFF(int whence)
{
    switch ( whence )
    {
        case SEEK_SET:
            return wxFromStart;

        case SEEK_CUR:
            return wxFromCurrent;

        case SEEK_END:
            return wxFromEnd;

        default:
            return wxFromCurrent;
    }
}

extern "C"
{

tsize_t TIFFLINKAGEMODE
_tiffNullProc(thandle_t WXUNUSED(handle),
          tdata_t WXUNUSED(buf),
          tsize_t WXUNUSED(size))
{
    return (tsize_t) -1;
}

tsize_t TIFFLINKAGEMODE
_tiffReadProc(thandle_t handle, tdata_t buf, tsize_t size)
{
    wxInputStream *stream = (wxInputStream*) handle;
    stream->Read( (void*) buf, (size_t) size );
    return wx_truncate_cast(tsize_t, stream->LastRead());
}

tsize_t TIFFLINKAGEMODE
_tiffWriteProc(thandle_t handle, tdata_t buf, tsize_t size)
{
    wxOutputStream *stream = (wxOutputStream*) handle;
    stream->Write( (void*) buf, (size_t) size );
    return wx_truncate_cast(tsize_t, stream->LastWrite());
}

toff_t TIFFLINKAGEMODE
_tiffSeekIProc(thandle_t handle, toff_t off, int whence)
{
    wxInputStream *stream = (wxInputStream*) handle;

    return wxFileOffsetToTIFF(stream->SeekI((wxFileOffset)off,
                                            wxSeekModeFromTIFF(whence)));
}

toff_t TIFFLINKAGEMODE
_tiffSeekOProc(thandle_t handle, toff_t off, int whence)
{
    wxOutputStream *stream = (wxOutputStream*) handle;

    return wxFileOffsetToTIFF(stream->SeekO((wxFileOffset)off,
                                            wxSeekModeFromTIFF(whence)));
}

int TIFFLINKAGEMODE
_tiffCloseProc(thandle_t WXUNUSED(handle))
{
    return 0;  // ?
}

toff_t TIFFLINKAGEMODE
_tiffSizeProc(thandle_t handle)
{
    wxStreamBase *stream = (wxStreamBase*) handle;
    return (toff_t) stream->GetSize();
}

int TIFFLINKAGEMODE
_tiffMapProc(thandle_t WXUNUSED(handle),
             tdata_t* WXUNUSED(pbase),
             toff_t* WXUNUSED(psize))
{
    return 0;
}

void TIFFLINKAGEMODE
_tiffUnmapProc(thandle_t WXUNUSED(handle),
               tdata_t WXUNUSED(base),
               toff_t WXUNUSED(size))
{
}

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*
TIFFwxOpen(wxInputStream &stream, const char* name, const char* mode)
{
    TIFF* tif = TIFFClientOpen(name, mode,
        (thandle_t) &stream,
        _tiffReadProc, _tiffNullProc,
        _tiffSeekIProc, _tiffCloseProc, _tiffSizeProc,
        _tiffMapProc, _tiffUnmapProc);

    return tif;
}

TIFF*
TIFFwxOpen(wxOutputStream &stream, const char* name, const char* mode)
{
    TIFF* tif = TIFFClientOpen(name, mode,
        (thandle_t) &stream,
        _tiffNullProc, _tiffWriteProc,
        _tiffSeekOProc, _tiffCloseProc, _tiffSizeProc,
        _tiffMapProc, _tiffUnmapProc);

    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)
        index = 0;

    image->Destroy();

    TIFF *tif = TIFFwxOpen( stream, "image", "r" );

    if (!tif)
    {
        if (verbose)
            wxLogError( _("TIFF: Error loading image.") );

        return false;
    }

    if (!TIFFSetDirectory( tif, (tdir_t)index ))
    {
        if (verbose)
            wxLogError( _("Invalid TIFF image index.") );

        TIFFClose( tif );

        return false;
    }

    uint32 w, h;
    uint32 npixels;
    uint32 *raster;

    TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
    TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );

    npixels = w * h;

    raster = (uint32*) _TIFFmalloc( npixels * sizeof(uint32) );

    if (!raster)
    {
        if (verbose)
            wxLogError( _("TIFF: Couldn't allocate memory.") );

        TIFFClose( tif );

        return false;
    }

    image->Create( (int)w, (int)h );
    if (!image->Ok())
    {
        if (verbose)
            wxLogError( _("TIFF: Couldn't allocate memory.") );

        _TIFFfree( raster );
        TIFFClose( tif );

        return false;
    }

    if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
    {
        if (verbose)
            wxLogError( _("TIFF: Error reading image.") );

        _TIFFfree( raster );
        image->Destroy();
        TIFFClose( tif );

        return false;
    }

    bool hasmask = false;

    unsigned char *ptr = image->GetData();
    ptr += w*3*(h-1);
    uint32 pos = 0;

    for (uint32 i = 0; i < h; i++)
    {
        for (uint32 j = 0; j < w; j++)
        {
            unsigned char alpha = (unsigned char)TIFFGetA(raster[pos]);
            if (alpha < 127)
            {
                hasmask = true;
                ptr[0] = image->GetMaskRed();
                ptr++;
                ptr[0] = image->GetMaskGreen();
                ptr++;
                ptr[0] = image->GetMaskBlue();
                ptr++;
            }
            else
            {
                ptr[0] = (unsigned char)TIFFGetR(raster[pos]);
                ptr++;
                ptr[0] = (unsigned char)TIFFGetG(raster[pos]);
                ptr++;
                ptr[0] = (unsigned char)TIFFGetB(raster[pos]);
                ptr++;
            }
            pos++;
        }
        ptr -= 2*w*3; // subtract line we just added plus one line
    }

    _TIFFfree( raster );

    TIFFClose( tif );

    image->SetMask( hasmask );

    return true;
}

int wxTIFFHandler::GetImageCount( wxInputStream& stream )
{
    TIFF *tif = TIFFwxOpen( stream, "image", "r" );

    if (!tif)
        return 0;

    int dircount = 0;  // according to the libtiff docs, dircount should be set to 1 here???
    do {
        dircount++;
    } while (TIFFReadDirectory(tif));

    TIFFClose( tif );

    return dircount;
}

bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
{
    TIFF *tif = TIFFwxOpen( stream, "image", "w" );

    if (!tif)
    {
        if (verbose)
            wxLogError( _("TIFF: Error saving image.") );

        return false;
    }

    TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
    TIFFSetField(tif, TIFFTAG_IMAGEWIDTH,  (uint32)image->GetWidth());
    TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32)image->GetHeight());
    TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
    TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);

    if ( image->HasOption(wxIMAGE_OPTION_RESOLUTIONX) &&
            image->HasOption(wxIMAGE_OPTION_RESOLUTIONY) )
    {
        TIFFSetField(tif, TIFFTAG_XRESOLUTION,
                        (float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX));
        TIFFSetField(tif, TIFFTAG_YRESOLUTION,
                        (float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY));
    }

    int spp = image->GetOptionInt(wxIMAGE_OPTION_SAMPLESPERPIXEL);
    if ( !spp )
        spp = 3;

    int bpp = image->GetOptionInt(wxIMAGE_OPTION_BITSPERSAMPLE);
    if ( !bpp )
        bpp=8;

    int compression = image->GetOptionInt(wxIMAGE_OPTION_COMPRESSION);
    if ( !compression )
        compression=COMPRESSION_LZW;

    TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, spp);
    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bpp);
    TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, spp*bpp == 1 ? PHOTOMETRIC_MINISBLACK
                                                        : PHOTOMETRIC_RGB);
    TIFFSetField(tif, TIFFTAG_COMPRESSION, compression);

    // scanlinesize if determined by spp and bpp
    tsize_t linebytes = (tsize_t)image->GetWidth() * spp * bpp / 8;

    if ( (image->GetWidth() % 8 > 0) && (spp * bpp < 8) )
        linebytes+=1;

    unsigned char *buf;

    if (TIFFScanlineSize(tif) > linebytes || (spp * bpp < 24))
    {
        buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif));
        if (!buf)
        {
            if (verbose)
                wxLogError( _("TIFF: Couldn't allocate memory.") );

            TIFFClose( tif );

            return false;
        }
    }
    else
    {
        buf = NULL;
    }

    TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,TIFFDefaultStripSize(tif, (uint32) -1));

    unsigned char *ptr = image->GetData();
    for ( int row = 0; row < image->GetHeight(); row++ )
    {
        if ( buf )
        {
            if ( spp * bpp > 1 )
            {
                // color image
                memcpy(buf, ptr, image->GetWidth());
            }
            else // black and white image
            {
                for ( int column = 0; column < linebytes; column++ )
                {
                    uint8 reverse = 0;
                    for ( int bp = 0; bp < 8; bp++ )
                    {
                        if ( ptr[column*24 + bp*3] > 0 )
                        {
                            // check only red as this is sufficient
                            reverse = (uint8)(reverse | 128 >> bp);
                        }
                    }

                    buf[column] = reverse;
                }
            }
        }

        if ( TIFFWriteScanline(tif, buf ? buf : ptr, (uint32)row, 0) < 0 )
        {
            if (verbose)
                wxLogError( _("TIFF: Error writing image.") );

            TIFFClose( tif );
            if (buf)
                _TIFFfree(buf);

            return false;
        }

        ptr += image->GetWidth()*3;
    }

    (void) TIFFClose(tif);

    if (buf)
        _TIFFfree(buf);

    return true;
}

bool wxTIFFHandler::DoCanRead( wxInputStream& stream )
{
    unsigned char hdr[2];

    if ( !stream.Read(&hdr[0], WXSIZEOF(hdr)) )
        return false;

    return (hdr[0] == 'I' && hdr[1] == 'I') ||
           (hdr[0] == 'M' && hdr[1] == 'M');
}

#endif  // wxUSE_STREAMS

#endif  // wxUSE_LIBTIFF
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/common/imagtiff.cpp
	3	// Purpose: wxImage TIFF handler
	4	// Author: Robert Roebling
	5	// RCS-ID: $Id$
	6	// Copyright: (c) Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	// For compilers that support precompilation, includes "wx.h".
	11	#include "wx/wxprec.h"
	12
	13	#ifdef __BORLANDC__
	14	#pragma hdrstop
	15	#endif
	16
	17	#include "wx/defs.h"
	18
	19	#if wxUSE_IMAGE && wxUSE_LIBTIFF
	20
	21	#include "wx/imagtiff.h"
	22	#include "wx/bitmap.h"
	23	#include "wx/debug.h"
	24	#include "wx/log.h"
	25	#include "wx/app.h"
	26	extern "C"
	27	{
	28	#include "tiff.h"
	29	#include "tiffio.h"
	30	}
	31	#include "wx/filefn.h"
	32	#include "wx/wfstream.h"
	33	#include "wx/intl.h"
	34	#include "wx/module.h"
	35
	36	#ifndef TIFFLINKAGEMODE
	37	#define TIFFLINKAGEMODE LINKAGEMODE
	38	#endif
	39
	40	//-----------------------------------------------------------------------------
	41	// wxTIFFHandler
	42	//-----------------------------------------------------------------------------
	43
	44	IMPLEMENT_DYNAMIC_CLASS(wxTIFFHandler,wxImageHandler)
	45
	46	#if wxUSE_STREAMS
	47
	48	// helper to translate our, possibly 64 bit, wxFileOffset to TIFF, always 32
	49	// bit, toff_t
	50	static toff_t wxFileOffsetToTIFF(wxFileOffset ofs)
	51	{
	52	if ( ofs == wxInvalidOffset )
	53	return (toff_t)-1;
	54
	55	toff_t tofs = wx_truncate_cast(toff_t, ofs);
	56	wxCHECK_MSG( (wxFileOffset)tofs == ofs, (toff_t)-1,
	57	_T("TIFF library doesn't support large files") );
	58
	59	return tofs;
	60	}
	61
	62	// another helper to convert standard seek mode to our
	63	static wxSeekMode wxSeekModeFromTIFF(int whence)
	64	{
	65	switch ( whence )
	66	{
	67	case SEEK_SET:
	68	return wxFromStart;
	69
	70	case SEEK_CUR:
	71	return wxFromCurrent;
	72
	73	case SEEK_END:
	74	return wxFromEnd;
	75
	76	default:
	77	return wxFromCurrent;
	78	}
	79	}
	80
	81	extern "C"
	82	{
	83
	84	tsize_t TIFFLINKAGEMODE
	85	_tiffNullProc(thandle_t WXUNUSED(handle),
	86	tdata_t WXUNUSED(buf),
	87	tsize_t WXUNUSED(size))
	88	{
	89	return (tsize_t) -1;
	90	}
	91
	92	tsize_t TIFFLINKAGEMODE
	93	_tiffReadProc(thandle_t handle, tdata_t buf, tsize_t size)
	94	{
	95	wxInputStream stream = (wxInputStream) handle;
	96	stream->Read( (void*) buf, (size_t) size );
	97	return wx_truncate_cast(tsize_t, stream->LastRead());
	98	}
	99
	100	tsize_t TIFFLINKAGEMODE
	101	_tiffWriteProc(thandle_t handle, tdata_t buf, tsize_t size)
	102	{
	103	wxOutputStream stream = (wxOutputStream) handle;
	104	stream->Write( (void*) buf, (size_t) size );
	105	return wx_truncate_cast(tsize_t, stream->LastWrite());
	106	}
	107
	108	toff_t TIFFLINKAGEMODE
	109	_tiffSeekIProc(thandle_t handle, toff_t off, int whence)
	110	{
	111	wxInputStream stream = (wxInputStream) handle;
	112
	113	return wxFileOffsetToTIFF(stream->SeekI((wxFileOffset)off,
	114	wxSeekModeFromTIFF(whence)));
	115	}
	116
	117	toff_t TIFFLINKAGEMODE
	118	_tiffSeekOProc(thandle_t handle, toff_t off, int whence)
	119	{
	120	wxOutputStream stream = (wxOutputStream) handle;
	121
	122	return wxFileOffsetToTIFF(stream->SeekO((wxFileOffset)off,
	123	wxSeekModeFromTIFF(whence)));
	124	}
	125
	126	int TIFFLINKAGEMODE
	127	_tiffCloseProc(thandle_t WXUNUSED(handle))
	128	{
	129	return 0; // ?
	130	}
	131
	132	toff_t TIFFLINKAGEMODE
	133	_tiffSizeProc(thandle_t handle)
	134	{
	135	wxStreamBase stream = (wxStreamBase) handle;
	136	return (toff_t) stream->GetSize();
	137	}
	138
	139	int TIFFLINKAGEMODE
	140	_tiffMapProc(thandle_t WXUNUSED(handle),
	141	tdata_t* WXUNUSED(pbase),
	142	toff_t* WXUNUSED(psize))
	143	{
	144	return 0;
	145	}
	146
	147	void TIFFLINKAGEMODE
	148	_tiffUnmapProc(thandle_t WXUNUSED(handle),
	149	tdata_t WXUNUSED(base),
	150	toff_t WXUNUSED(size))
	151	{
	152	}
	153
	154	static void
	155	TIFFwxWarningHandler(const char* module,
	156	const char* WXUNUSED_IN_UNICODE(fmt),
	157	va_list WXUNUSED_IN_UNICODE(ap))
	158	{
	159	if (module != NULL)
	160	wxLogWarning(_("tiff module: %s"), wxString::FromAscii(module).c_str());
	161
	162	// FIXME: this is not terrible informative but better than crashing!
	163	#if wxUSE_UNICODE
	164	wxLogWarning(_("TIFF library warning."));
	165	#else
	166	wxVLogWarning(fmt, ap);
	167	#endif
	168	}
	169
	170	static void
	171	TIFFwxErrorHandler(const char* module,
	172	const char* WXUNUSED_IN_UNICODE(fmt),
	173	va_list WXUNUSED_IN_UNICODE(ap))
	174	{
	175	if (module != NULL)
	176	wxLogError(_("tiff module: %s"), wxString::FromAscii(module).c_str());
	177
	178	// FIXME: as above
	179	#if wxUSE_UNICODE
	180	wxLogError(_("TIFF library error."));
	181	#else
	182	wxVLogError(fmt, ap);
	183	#endif
	184	}
	185
	186	} // extern "C"
	187
	188	TIFF*
	189	TIFFwxOpen(wxInputStream &stream, const char* name, const char* mode)
	190	{
	191	TIFF* tif = TIFFClientOpen(name, mode,
	192	(thandle_t) &stream,
	193	_tiffReadProc, _tiffNullProc,
	194	_tiffSeekIProc, _tiffCloseProc, _tiffSizeProc,
	195	_tiffMapProc, _tiffUnmapProc);
	196
	197	return tif;
	198	}
	199
	200	TIFF*
	201	TIFFwxOpen(wxOutputStream &stream, const char* name, const char* mode)
	202	{
	203	TIFF* tif = TIFFClientOpen(name, mode,
	204	(thandle_t) &stream,
	205	_tiffNullProc, _tiffWriteProc,
	206	_tiffSeekOProc, _tiffCloseProc, _tiffSizeProc,
	207	_tiffMapProc, _tiffUnmapProc);
	208
	209	return tif;
	210	}
	211
	212	wxTIFFHandler::wxTIFFHandler()
	213	{
	214	m_name = wxT("TIFF file");
	215	m_extension = wxT("tif");
	216	m_type = wxBITMAP_TYPE_TIF;
	217	m_mime = wxT("image/tiff");
	218	TIFFSetWarningHandler((TIFFErrorHandler) TIFFwxWarningHandler);
	219	TIFFSetErrorHandler((TIFFErrorHandler) TIFFwxErrorHandler);
	220	}
	221
	222	bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int index )
	223	{
	224	if (index == -1)
	225	index = 0;
	226
	227	image->Destroy();
	228
	229	TIFF *tif = TIFFwxOpen( stream, "image", "r" );
	230
	231	if (!tif)
	232	{
	233	if (verbose)
	234	wxLogError( _("TIFF: Error loading image.") );
	235
	236	return false;
	237	}
	238
	239	if (!TIFFSetDirectory( tif, (tdir_t)index ))
	240	{
	241	if (verbose)
	242	wxLogError( _("Invalid TIFF image index.") );
	243
	244	TIFFClose( tif );
	245
	246	return false;
	247	}
	248
	249	uint32 w, h;
	250	uint32 npixels;
	251	uint32 *raster;
	252
	253	TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
	254	TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );
	255
	256	npixels = w * h;
	257
	258	raster = (uint32) _TIFFmalloc( npixels sizeof(uint32) );
	259
	260	if (!raster)
	261	{
	262	if (verbose)
	263	wxLogError( _("TIFF: Couldn't allocate memory.") );
	264
	265	TIFFClose( tif );
	266
	267	return false;
	268	}
	269
	270	image->Create( (int)w, (int)h );
	271	if (!image->Ok())
	272	{
	273	if (verbose)
	274	wxLogError( _("TIFF: Couldn't allocate memory.") );
	275
	276	_TIFFfree( raster );
	277	TIFFClose( tif );
	278
	279	return false;
	280	}
	281
	282	if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
	283	{
	284	if (verbose)
	285	wxLogError( _("TIFF: Error reading image.") );
	286
	287	_TIFFfree( raster );
	288	image->Destroy();
	289	TIFFClose( tif );
	290
	291	return false;
	292	}
	293
	294	bool hasmask = false;
	295
	296	unsigned char *ptr = image->GetData();
	297	ptr += w3(h-1);
	298	uint32 pos = 0;
	299
	300	for (uint32 i = 0; i < h; i++)
	301	{
	302	for (uint32 j = 0; j < w; j++)
	303	{
	304	unsigned char alpha = (unsigned char)TIFFGetA(raster[pos]);
	305	if (alpha < 127)
	306	{
	307	hasmask = true;
	308	ptr[0] = image->GetMaskRed();
	309	ptr++;
	310	ptr[0] = image->GetMaskGreen();
	311	ptr++;
	312	ptr[0] = image->GetMaskBlue();
	313	ptr++;
	314	}
	315	else
	316	{
	317	ptr[0] = (unsigned char)TIFFGetR(raster[pos]);
	318	ptr++;
	319	ptr[0] = (unsigned char)TIFFGetG(raster[pos]);
	320	ptr++;
	321	ptr[0] = (unsigned char)TIFFGetB(raster[pos]);
	322	ptr++;
	323	}
	324	pos++;
	325	}
	326	ptr -= 2w3; // subtract line we just added plus one line
	327	}
	328
	329	_TIFFfree( raster );
	330
	331	TIFFClose( tif );
	332
	333	image->SetMask( hasmask );
	334
	335	return true;
	336	}
	337
	338	int wxTIFFHandler::GetImageCount( wxInputStream& stream )
	339	{
	340	TIFF *tif = TIFFwxOpen( stream, "image", "r" );
	341
	342	if (!tif)
	343	return 0;
	344
	345	int dircount = 0; // according to the libtiff docs, dircount should be set to 1 here???
	346	do {
	347	dircount++;
	348	} while (TIFFReadDirectory(tif));
	349
	350	TIFFClose( tif );
	351
	352	return dircount;
	353	}
	354
	355	bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
	356	{
	357	TIFF *tif = TIFFwxOpen( stream, "image", "w" );
	358
	359	if (!tif)
	360	{
	361	if (verbose)
	362	wxLogError( _("TIFF: Error saving image.") );
	363
	364	return false;
	365	}
	366
	367	TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
	368	TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (uint32)image->GetWidth());
	369	TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32)image->GetHeight());
	370	TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
	371	TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
	372
	373	if ( image->HasOption(wxIMAGE_OPTION_RESOLUTIONX) &&
	374	image->HasOption(wxIMAGE_OPTION_RESOLUTIONY) )
	375	{
	376	TIFFSetField(tif, TIFFTAG_XRESOLUTION,
	377	(float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX));
	378	TIFFSetField(tif, TIFFTAG_YRESOLUTION,
	379	(float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY));
	380	}
	381
	382	int spp = image->GetOptionInt(wxIMAGE_OPTION_SAMPLESPERPIXEL);
	383	if ( !spp )
	384	spp = 3;
	385
	386	int bpp = image->GetOptionInt(wxIMAGE_OPTION_BITSPERSAMPLE);
	387	if ( !bpp )
	388	bpp=8;
	389
	390	int compression = image->GetOptionInt(wxIMAGE_OPTION_COMPRESSION);
	391	if ( !compression )
	392	compression=COMPRESSION_LZW;
	393
	394	TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, spp);
	395	TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bpp);
	396	TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, spp*bpp == 1 ? PHOTOMETRIC_MINISBLACK
	397	: PHOTOMETRIC_RGB);
	398	TIFFSetField(tif, TIFFTAG_COMPRESSION, compression);
	399
	400	// scanlinesize if determined by spp and bpp
	401	tsize_t linebytes = (tsize_t)image->GetWidth() * spp * bpp / 8;
	402
	403	if ( (image->GetWidth() % 8 > 0) && (spp * bpp < 8) )
	404	linebytes+=1;
	405
	406	unsigned char *buf;
	407
	408	if (TIFFScanlineSize(tif) > linebytes \|\| (spp * bpp < 24))
	409	{
	410	buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif));
	411	if (!buf)
	412	{
	413	if (verbose)
	414	wxLogError( _("TIFF: Couldn't allocate memory.") );
	415
	416	TIFFClose( tif );
	417
	418	return false;
	419	}
	420	}
	421	else
	422	{
	423	buf = NULL;
	424	}
	425
	426	TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,TIFFDefaultStripSize(tif, (uint32) -1));
	427
	428	unsigned char *ptr = image->GetData();
	429	for ( int row = 0; row < image->GetHeight(); row++ )
	430	{
	431	if ( buf )
	432	{
	433	if ( spp * bpp > 1 )
	434	{
	435	// color image
	436	memcpy(buf, ptr, image->GetWidth());
	437	}
	438	else // black and white image
	439	{
	440	for ( int column = 0; column < linebytes; column++ )
	441	{
	442	uint8 reverse = 0;
	443	for ( int bp = 0; bp < 8; bp++ )
	444	{
	445	if ( ptr[column24 + bp3] > 0 )
	446	{
	447	// check only red as this is sufficient
	448	reverse = (uint8)(reverse \| 128 >> bp);
	449	}
	450	}
	451
	452	buf[column] = reverse;
	453	}
	454	}
	455	}
	456
	457	if ( TIFFWriteScanline(tif, buf ? buf : ptr, (uint32)row, 0) < 0 )
	458	{
	459	if (verbose)
	460	wxLogError( _("TIFF: Error writing image.") );
	461
	462	TIFFClose( tif );
	463	if (buf)
	464	_TIFFfree(buf);
	465
	466	return false;
	467	}
	468
	469	ptr += image->GetWidth()*3;
	470	}
	471
	472	(void) TIFFClose(tif);
	473
	474	if (buf)
	475	_TIFFfree(buf);
	476
	477	return true;
	478	}
	479
	480	bool wxTIFFHandler::DoCanRead( wxInputStream& stream )
	481	{
	482	unsigned char hdr[2];
	483
	484	if ( !stream.Read(&hdr[0], WXSIZEOF(hdr)) )
	485	return false;
	486
	487	return (hdr[0] == 'I' && hdr[1] == 'I') \|\|
	488	(hdr[0] == 'M' && hdr[1] == 'M');
	489	}
	490
	491	#endif // wxUSE_STREAMS
	492
	493	#endif // wxUSE_LIBTIFF