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wxWidgets/src/common/imagtiff.cpp

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/////////////////////////////////////////////////////////////////////////////
// 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
#if wxUSE_IMAGE && wxUSE_LIBTIFF
#include "wx/imagtiff.h"
#ifndef WX_PRECOMP
#include "wx/log.h"
#include "wx/app.h"
#include "wx/intl.h"
#include "wx/bitmap.h"
#endif
extern "C"
{
#include "tiff.h"
#include "tiffio.h"
}
#include "wx/filefn.h"
#include "wx/wfstream.h"
#include "wx/module.h"
#ifndef TIFFLINKAGEMODE
#if defined(__WATCOMC__) && defined(__WXMGL__)
#define TIFFLINKAGEMODE cdecl
#else
#define TIFFLINKAGEMODE LINKAGEMODE
#endif
#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 )
{
// we can't use COMPRESSION_LZW because current version of libtiff
// doesn't implement it ("no longer implemented due to Unisys patent
// enforcement") and other compression methods are lossy so we
// shouldn't use them by default -- and the only remaining one is none
compression = COMPRESSION_NONE;
}
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
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