4d37f425ff
Read a few TIFF tags that assist with having a similar TIFF file when saving the image again, instead of (by default) always saving as a 24-bit RGB image. Also, in accordance with libtiff, allow reading X and Y resolution values even if the resolution unit tag is not set. Applied (modified) patch by scottb. Closes #13015. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67264 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
701 lines
18 KiB
C++
701 lines
18 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/common/imagtiff.cpp
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// Purpose: wxImage TIFF handler
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// Author: Robert Roebling
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// RCS-ID: $Id$
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// Copyright: (c) Robert Roebling
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_IMAGE && wxUSE_LIBTIFF
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#include "wx/imagtiff.h"
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#include "wx/versioninfo.h"
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#ifndef WX_PRECOMP
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#include "wx/log.h"
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#include "wx/app.h"
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#include "wx/intl.h"
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#include "wx/bitmap.h"
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#include "wx/module.h"
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#include "wx/wxcrtvararg.h"
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#endif
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extern "C"
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{
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#ifdef __DMC__
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#include "tif_config.h"
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#endif
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#include "tiff.h"
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#include "tiffio.h"
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}
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#include "wx/filefn.h"
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#include "wx/wfstream.h"
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#ifndef TIFFLINKAGEMODE
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#if defined(__WATCOMC__) && defined(__WXMGL__)
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#define TIFFLINKAGEMODE cdecl
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#else
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#define TIFFLINKAGEMODE LINKAGEMODE
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#endif
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#endif
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// TIFF library error/warning handlers
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// ----------------------------------------------------------------------------
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static wxString
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FormatTiffMessage(const char *module, const char *fmt, va_list ap)
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{
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char buf[512];
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if ( wxCRT_VsnprintfA(buf, WXSIZEOF(buf), fmt, ap) <= 0 )
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{
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// this isn't supposed to happen, but if it does, it's better
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// than nothing
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strcpy(buf, "Incorrectly formatted TIFF message");
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}
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buf[WXSIZEOF(buf)-1] = 0; // make sure it is always NULL-terminated
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wxString msg(buf);
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if ( module )
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msg += wxString::Format(_(" (in module \"%s\")"), module);
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return msg;
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}
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extern "C"
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{
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static void
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TIFFwxWarningHandler(const char* module, const char *fmt, va_list ap)
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{
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wxLogWarning("%s", FormatTiffMessage(module, fmt, ap));
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}
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static void
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TIFFwxErrorHandler(const char* module, const char *fmt, va_list ap)
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{
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wxLogError("%s", FormatTiffMessage(module, fmt, ap));
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}
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} // extern "C"
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//-----------------------------------------------------------------------------
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// wxTIFFHandler
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//-----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxTIFFHandler,wxImageHandler)
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wxTIFFHandler::wxTIFFHandler()
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{
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m_name = wxT("TIFF file");
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m_extension = wxT("tif");
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m_altExtensions.Add(wxT("tiff"));
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m_type = wxBITMAP_TYPE_TIF;
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m_mime = wxT("image/tiff");
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TIFFSetWarningHandler((TIFFErrorHandler) TIFFwxWarningHandler);
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TIFFSetErrorHandler((TIFFErrorHandler) TIFFwxErrorHandler);
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}
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#if wxUSE_STREAMS
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// helper to translate our, possibly 64 bit, wxFileOffset to TIFF, always 32
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// bit, toff_t
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static toff_t wxFileOffsetToTIFF(wxFileOffset ofs)
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{
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if ( ofs == wxInvalidOffset )
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return (toff_t)-1;
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toff_t tofs = wx_truncate_cast(toff_t, ofs);
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wxCHECK_MSG( (wxFileOffset)tofs == ofs, (toff_t)-1,
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wxT("TIFF library doesn't support large files") );
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return tofs;
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}
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// another helper to convert standard seek mode to our
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static wxSeekMode wxSeekModeFromTIFF(int whence)
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{
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switch ( whence )
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{
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case SEEK_SET:
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return wxFromStart;
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case SEEK_CUR:
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return wxFromCurrent;
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case SEEK_END:
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return wxFromEnd;
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default:
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return wxFromCurrent;
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}
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}
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extern "C"
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{
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tsize_t TIFFLINKAGEMODE
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wxTIFFNullProc(thandle_t WXUNUSED(handle),
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tdata_t WXUNUSED(buf),
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tsize_t WXUNUSED(size))
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{
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return (tsize_t) -1;
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}
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tsize_t TIFFLINKAGEMODE
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wxTIFFReadProc(thandle_t handle, tdata_t buf, tsize_t size)
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{
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wxInputStream *stream = (wxInputStream*) handle;
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stream->Read( (void*) buf, (size_t) size );
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return wx_truncate_cast(tsize_t, stream->LastRead());
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}
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tsize_t TIFFLINKAGEMODE
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wxTIFFWriteProc(thandle_t handle, tdata_t buf, tsize_t size)
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{
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wxOutputStream *stream = (wxOutputStream*) handle;
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stream->Write( (void*) buf, (size_t) size );
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return wx_truncate_cast(tsize_t, stream->LastWrite());
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}
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toff_t TIFFLINKAGEMODE
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wxTIFFSeekIProc(thandle_t handle, toff_t off, int whence)
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{
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wxInputStream *stream = (wxInputStream*) handle;
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return wxFileOffsetToTIFF(stream->SeekI((wxFileOffset)off,
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wxSeekModeFromTIFF(whence)));
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}
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toff_t TIFFLINKAGEMODE
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wxTIFFSeekOProc(thandle_t handle, toff_t off, int whence)
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{
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wxOutputStream *stream = (wxOutputStream*) handle;
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return wxFileOffsetToTIFF(stream->SeekO((wxFileOffset)off,
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wxSeekModeFromTIFF(whence)));
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}
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int TIFFLINKAGEMODE
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wxTIFFCloseIProc(thandle_t WXUNUSED(handle))
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{
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// there is no need to close the input stream
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return 0;
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}
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int TIFFLINKAGEMODE
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wxTIFFCloseOProc(thandle_t handle)
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{
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wxOutputStream *stream = (wxOutputStream*) handle;
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return stream->Close() ? 0 : -1;
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}
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toff_t TIFFLINKAGEMODE
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wxTIFFSizeProc(thandle_t handle)
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{
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wxStreamBase *stream = (wxStreamBase*) handle;
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return (toff_t) stream->GetSize();
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}
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int TIFFLINKAGEMODE
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wxTIFFMapProc(thandle_t WXUNUSED(handle),
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tdata_t* WXUNUSED(pbase),
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toff_t* WXUNUSED(psize))
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{
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return 0;
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}
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void TIFFLINKAGEMODE
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wxTIFFUnmapProc(thandle_t WXUNUSED(handle),
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tdata_t WXUNUSED(base),
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toff_t WXUNUSED(size))
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{
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}
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} // extern "C"
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TIFF*
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TIFFwxOpen(wxInputStream &stream, const char* name, const char* mode)
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{
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TIFF* tif = TIFFClientOpen(name, mode,
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(thandle_t) &stream,
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wxTIFFReadProc, wxTIFFNullProc,
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wxTIFFSeekIProc, wxTIFFCloseIProc, wxTIFFSizeProc,
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wxTIFFMapProc, wxTIFFUnmapProc);
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return tif;
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}
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TIFF*
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TIFFwxOpen(wxOutputStream &stream, const char* name, const char* mode)
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{
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TIFF* tif = TIFFClientOpen(name, mode,
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(thandle_t) &stream,
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wxTIFFNullProc, wxTIFFWriteProc,
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wxTIFFSeekOProc, wxTIFFCloseOProc, wxTIFFSizeProc,
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wxTIFFMapProc, wxTIFFUnmapProc);
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return tif;
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}
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bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int index )
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{
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if (index == -1)
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index = 0;
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image->Destroy();
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TIFF *tif = TIFFwxOpen( stream, "image", "r" );
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if (!tif)
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{
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if (verbose)
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{
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wxLogError( _("TIFF: Error loading image.") );
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}
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return false;
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}
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if (!TIFFSetDirectory( tif, (tdir_t)index ))
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{
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if (verbose)
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{
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wxLogError( _("Invalid TIFF image index.") );
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}
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TIFFClose( tif );
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return false;
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}
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uint32 w, h;
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uint32 *raster;
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TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
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TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );
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uint16 photometric;
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uint16 samplesPerPixel;
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uint16 extraSamples;
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uint16* samplesInfo;
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TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &samplesPerPixel);
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TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES,
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&extraSamples, &samplesInfo);
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if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric))
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{
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photometric = PHOTOMETRIC_MINISWHITE;
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}
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const bool hasAlpha = (extraSamples >= 1
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&& ((samplesInfo[0] == EXTRASAMPLE_UNSPECIFIED && samplesPerPixel > 3)
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|| samplesInfo[0] == EXTRASAMPLE_ASSOCALPHA
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|| samplesInfo[0] == EXTRASAMPLE_UNASSALPHA))
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|| (extraSamples == 0 && samplesPerPixel == 4
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&& photometric == PHOTOMETRIC_RGB);
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// guard against integer overflow during multiplication which could result
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// in allocating a too small buffer and then overflowing it
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const double bytesNeeded = (double)w * (double)h * sizeof(uint32);
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if ( bytesNeeded >= wxUINT32_MAX )
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{
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if ( verbose )
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{
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wxLogError( _("TIFF: Image size is abnormally big.") );
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}
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TIFFClose(tif);
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return false;
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}
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raster = (uint32*) _TIFFmalloc( (uint32)bytesNeeded );
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if (!raster)
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{
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if (verbose)
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{
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wxLogError( _("TIFF: Couldn't allocate memory.") );
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}
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TIFFClose( tif );
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return false;
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}
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image->Create( (int)w, (int)h );
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if (!image->Ok())
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{
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if (verbose)
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{
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wxLogError( _("TIFF: Couldn't allocate memory.") );
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}
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_TIFFfree( raster );
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TIFFClose( tif );
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return false;
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}
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if ( hasAlpha )
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image->SetAlpha();
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if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
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{
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if (verbose)
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{
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wxLogError( _("TIFF: Error reading image.") );
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}
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_TIFFfree( raster );
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image->Destroy();
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TIFFClose( tif );
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return false;
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}
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unsigned char *ptr = image->GetData();
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ptr += w*3*(h-1);
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unsigned char *alpha = hasAlpha ? image->GetAlpha() : NULL;
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if ( hasAlpha )
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alpha += w*(h-1);
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uint32 pos = 0;
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for (uint32 i = 0; i < h; i++)
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{
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for (uint32 j = 0; j < w; j++)
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{
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*(ptr++) = (unsigned char)TIFFGetR(raster[pos]);
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*(ptr++) = (unsigned char)TIFFGetG(raster[pos]);
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*(ptr++) = (unsigned char)TIFFGetB(raster[pos]);
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if ( hasAlpha )
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*(alpha++) = (unsigned char)TIFFGetA(raster[pos]);
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pos++;
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}
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// subtract line we just added plus one line:
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ptr -= 2*w*3;
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if ( hasAlpha )
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alpha -= 2*w;
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}
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uint16 spp, bpp, compression;
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/*
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Read some baseline TIFF tags which helps when re-saving a TIFF
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to be similar to the original image.
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*/
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if ( TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &spp) )
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{
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image->SetOption(wxIMAGE_OPTION_SAMPLESPERPIXEL, spp);
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}
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if ( TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bpp) )
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{
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image->SetOption(wxIMAGE_OPTION_BITSPERSAMPLE, bpp);
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}
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if ( TIFFGetFieldDefaulted(tif, TIFFTAG_COMPRESSION, &compression) )
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{
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image->SetOption(wxIMAGE_OPTION_COMPRESSION, compression);
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}
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// Set the resolution unit.
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wxImageResolution resUnit = wxIMAGE_RESOLUTION_NONE;
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uint16 tiffRes;
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if ( TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &tiffRes) )
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{
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switch (tiffRes)
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{
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default:
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wxLogWarning(_("Unknown TIFF resolution unit %d ignored"),
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tiffRes);
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// fall through
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case RESUNIT_NONE:
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resUnit = wxIMAGE_RESOLUTION_NONE;
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break;
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case RESUNIT_INCH:
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resUnit = wxIMAGE_RESOLUTION_INCHES;
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break;
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case RESUNIT_CENTIMETER:
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resUnit = wxIMAGE_RESOLUTION_CM;
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break;
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}
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}
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image->SetOption(wxIMAGE_OPTION_RESOLUTIONUNIT, resUnit);
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/*
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Set the image resolution if it's available. Resolution tag is not
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dependant on RESOLUTIONUNIT != RESUNIT_NONE (according to TIFF spec).
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*/
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float resX, resY;
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if ( TIFFGetField(tif, TIFFTAG_XRESOLUTION, &resX) )
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{
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/*
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Use a string value to not lose precision.
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rounding to int as cm and then converting to inch may
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result in whole integer rounding error, eg. 201 instead of 200 dpi.
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If an app wants an int, GetOptionInt will convert and round down.
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*/
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image->SetOption(wxIMAGE_OPTION_RESOLUTIONX,
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wxString::FromCDouble((double) resX));
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}
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if ( TIFFGetField(tif, TIFFTAG_YRESOLUTION, &resY) )
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{
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image->SetOption(wxIMAGE_OPTION_RESOLUTIONY,
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wxString::FromCDouble((double) resY));
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}
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_TIFFfree( raster );
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TIFFClose( tif );
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return true;
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}
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int wxTIFFHandler::DoGetImageCount( wxInputStream& stream )
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{
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TIFF *tif = TIFFwxOpen( stream, "image", "r" );
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if (!tif)
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return 0;
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int dircount = 0; // according to the libtiff docs, dircount should be set to 1 here???
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do {
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dircount++;
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} while (TIFFReadDirectory(tif));
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TIFFClose( tif );
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// NOTE: this function modifies the current stream position but it's ok
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// (see wxImageHandler::GetImageCount)
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return dircount;
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}
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bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
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{
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TIFF *tif = TIFFwxOpen( stream, "image", "w" );
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if (!tif)
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{
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if (verbose)
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{
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wxLogError( _("TIFF: Error saving image.") );
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}
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return false;
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}
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TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
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TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (uint32)image->GetWidth());
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TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32)image->GetHeight());
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TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
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TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
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// save the image resolution if we have it
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int xres, yres;
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const wxImageResolution res = GetResolutionFromOptions(*image, &xres, &yres);
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uint16 tiffRes;
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switch ( res )
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{
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default:
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wxFAIL_MSG( wxT("unknown image resolution units") );
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// fall through
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case wxIMAGE_RESOLUTION_NONE:
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tiffRes = RESUNIT_NONE;
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break;
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case wxIMAGE_RESOLUTION_INCHES:
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tiffRes = RESUNIT_INCH;
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break;
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case wxIMAGE_RESOLUTION_CM:
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tiffRes = RESUNIT_CENTIMETER;
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break;
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}
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if ( tiffRes != RESUNIT_NONE )
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{
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TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, tiffRes);
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TIFFSetField(tif, TIFFTAG_XRESOLUTION, (float)xres);
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TIFFSetField(tif, TIFFTAG_YRESOLUTION, (float)yres);
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}
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int spp = image->GetOptionInt(wxIMAGE_OPTION_SAMPLESPERPIXEL);
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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)) ) // it's ok to modify the stream position here
|
|
return false;
|
|
|
|
return (hdr[0] == 'I' && hdr[1] == 'I') ||
|
|
(hdr[0] == 'M' && hdr[1] == 'M');
|
|
}
|
|
|
|
#endif // wxUSE_STREAMS
|
|
|
|
/*static*/ wxVersionInfo wxTIFFHandler::GetLibraryVersionInfo()
|
|
{
|
|
int major,
|
|
minor,
|
|
micro;
|
|
|
|
const wxString ver(::TIFFGetVersion());
|
|
if ( wxSscanf(ver, "LIBTIFF, Version %d.%d.%d", &major, &minor, µ) != 3 )
|
|
{
|
|
wxLogDebug("Unrecognized libtiff version string \"%s\"", ver);
|
|
|
|
major =
|
|
minor =
|
|
micro = 0;
|
|
}
|
|
|
|
wxString copyright;
|
|
const wxString desc = ver.BeforeFirst('\n', ©right);
|
|
copyright.Replace("\n", "");
|
|
|
|
return wxVersionInfo("libtiff", major, minor, micro, desc, copyright);
|
|
}
|
|
|
|
#endif // wxUSE_LIBTIFF
|