/////////////////////////////////////////////////////////////////////////////
-// Name: imagtiff.cpp
+// Name: src/common/imagtiff.cpp
// Purpose: wxImage TIFF handler
// Author: Robert Roebling
// RCS-ID: $Id$
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #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"
+
+#ifndef WX_PRECOMP
+ #include "wx/log.h"
+ #include "wx/app.h"
+ #include "wx/intl.h"
+ #include "wx/bitmap.h"
+ #include "wx/module.h"
+#endif
+
extern "C"
{
#include "tiff.h"
}
#include "wx/filefn.h"
#include "wx/wfstream.h"
-#include "wx/intl.h"
-#include "wx/module.h"
#ifndef TIFFLINKAGEMODE
- #define TIFFLINKAGEMODE LINKAGEMODE
+ #if defined(__WATCOMC__) && defined(__WXMGL__)
+ #define TIFFLINKAGEMODE cdecl
+ #else
+ #define TIFFLINKAGEMODE LINKAGEMODE
+ #endif
#endif
//-----------------------------------------------------------------------------
#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),
+wxTIFFNullProc(thandle_t WXUNUSED(handle),
tdata_t WXUNUSED(buf),
tsize_t WXUNUSED(size))
{
}
tsize_t TIFFLINKAGEMODE
-_tiffReadProc(thandle_t handle, tdata_t buf, tsize_t size)
+wxTIFFReadProc(thandle_t handle, tdata_t buf, tsize_t size)
{
wxInputStream *stream = (wxInputStream*) handle;
stream->Read( (void*) buf, (size_t) size );
- return stream->LastRead();
+ return wx_truncate_cast(tsize_t, stream->LastRead());
}
tsize_t TIFFLINKAGEMODE
-_tiffWriteProc(thandle_t handle, tdata_t buf, tsize_t size)
+wxTIFFWriteProc(thandle_t handle, tdata_t buf, tsize_t size)
{
wxOutputStream *stream = (wxOutputStream*) handle;
stream->Write( (void*) buf, (size_t) size );
- return stream->LastWrite();
+ return wx_truncate_cast(tsize_t, stream->LastWrite());
}
toff_t TIFFLINKAGEMODE
-_tiffSeekIProc(thandle_t handle, toff_t off, int whence)
+wxTIFFSeekIProc(thandle_t handle, toff_t off, int whence)
{
wxInputStream *stream = (wxInputStream*) handle;
- wxSeekMode mode;
- switch (whence)
- {
- case SEEK_SET: mode = wxFromStart; break;
- case SEEK_CUR: mode = wxFromCurrent; break;
- case SEEK_END: mode = wxFromEnd; break;
- default: mode = wxFromCurrent; break;
- }
- return (toff_t)stream->SeekI( (wxFileOffset)off, mode );
+ return wxFileOffsetToTIFF(stream->SeekI((wxFileOffset)off,
+ wxSeekModeFromTIFF(whence)));
}
toff_t TIFFLINKAGEMODE
-_tiffSeekOProc(thandle_t handle, toff_t off, int whence)
+wxTIFFSeekOProc(thandle_t handle, toff_t off, int whence)
{
wxOutputStream *stream = (wxOutputStream*) handle;
- wxSeekMode mode;
- switch (whence)
- {
- case SEEK_SET: mode = wxFromStart; break;
- case SEEK_CUR: mode = wxFromCurrent; break;
- case SEEK_END: mode = wxFromEnd; break;
- default: mode = wxFromCurrent; break;
- }
- return (toff_t)stream->SeekO( (wxFileOffset)off, mode );
+ return wxFileOffsetToTIFF(stream->SeekO((wxFileOffset)off,
+ wxSeekModeFromTIFF(whence)));
}
int TIFFLINKAGEMODE
-_tiffCloseProc(thandle_t WXUNUSED(handle))
+wxTIFFCloseIProc(thandle_t WXUNUSED(handle))
{
- return 0; // ?
+ // there is no need to close the input stream
+ return 0;
+}
+
+int TIFFLINKAGEMODE
+wxTIFFCloseOProc(thandle_t handle)
+{
+ wxOutputStream *stream = (wxOutputStream*) handle;
+
+ return stream->Close() ? 0 : -1;
}
toff_t TIFFLINKAGEMODE
-_tiffSizeProc(thandle_t handle)
+wxTIFFSizeProc(thandle_t handle)
{
wxStreamBase *stream = (wxStreamBase*) handle;
return (toff_t) stream->GetSize();
}
int TIFFLINKAGEMODE
-_tiffMapProc(thandle_t WXUNUSED(handle),
+wxTIFFMapProc(thandle_t WXUNUSED(handle),
tdata_t* WXUNUSED(pbase),
toff_t* WXUNUSED(psize))
{
}
void TIFFLINKAGEMODE
-_tiffUnmapProc(thandle_t WXUNUSED(handle),
+wxTIFFUnmapProc(thandle_t WXUNUSED(handle),
tdata_t WXUNUSED(base),
toff_t WXUNUSED(size))
{
{
TIFF* tif = TIFFClientOpen(name, mode,
(thandle_t) &stream,
- _tiffReadProc, _tiffNullProc,
- _tiffSeekIProc, _tiffCloseProc, _tiffSizeProc,
- _tiffMapProc, _tiffUnmapProc);
+ wxTIFFReadProc, wxTIFFNullProc,
+ wxTIFFSeekIProc, wxTIFFCloseIProc, wxTIFFSizeProc,
+ wxTIFFMapProc, wxTIFFUnmapProc);
return tif;
}
{
TIFF* tif = TIFFClientOpen(name, mode,
(thandle_t) &stream,
- _tiffNullProc, _tiffWriteProc,
- _tiffSeekOProc, _tiffCloseProc, _tiffSizeProc,
- _tiffMapProc, _tiffUnmapProc);
+ wxTIFFNullProc, wxTIFFWriteProc,
+ wxTIFFSeekOProc, wxTIFFCloseOProc, wxTIFFSizeProc,
+ wxTIFFMapProc, wxTIFFUnmapProc);
return tif;
}
TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );
+ uint16 extraSamples;
+ uint16* samplesInfo;
+ TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES,
+ &extraSamples, &samplesInfo);
+ const bool hasAlpha = (extraSamples == 1 &&
+ (samplesInfo[0] == EXTRASAMPLE_ASSOCALPHA ||
+ samplesInfo[0] == EXTRASAMPLE_UNASSALPHA));
+
npixels = w * h;
raster = (uint32*) _TIFFmalloc( npixels * sizeof(uint32) );
return false;
}
+ if ( hasAlpha )
+ image->SetAlpha();
+
if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
{
if (verbose)
return false;
}
- bool hasmask = false;
-
unsigned char *ptr = image->GetData();
ptr += w*3*(h-1);
+
+ unsigned char *alpha = hasAlpha ? image->GetAlpha() : NULL;
+ if ( hasAlpha )
+ alpha += w*(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++;
- }
+ *(ptr++) = (unsigned char)TIFFGetR(raster[pos]);
+ *(ptr++) = (unsigned char)TIFFGetG(raster[pos]);
+ *(ptr++) = (unsigned char)TIFFGetB(raster[pos]);
+ if ( hasAlpha )
+ *(alpha++) = (unsigned char)TIFFGetA(raster[pos]);
+
pos++;
}
- ptr -= 2*w*3; // subtract line we just added plus one line
+
+ // subtract line we just added plus one line:
+ ptr -= 2*w*3;
+ if ( hasAlpha )
+ alpha -= 2*w;
}
_TIFFfree( raster );
TIFFClose( tif );
- image->SetMask( hasmask );
-
return true;
}
int compression = image->GetOptionInt(wxIMAGE_OPTION_COMPRESSION);
if ( !compression )
- compression=COMPRESSION_LZW;
+ {
+ // 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);
if ( ptr[column*24 + bp*3] > 0 )
{
// check only red as this is sufficient
- reverse = reverse | 128 >> bp;
+ reverse = (uint8)(reverse | 128 >> bp);
}
}
#endif // wxUSE_STREAMS
#endif // wxUSE_LIBTIFF
-
projects / wxWidgets.git / blobdiff