X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/5beedebb828f9dcfcd614abc81926025e039c6cd..74a8f67d96591cec101def2a7d47c64072aff7fd:/src/common/imagtiff.cpp diff --git a/src/common/imagtiff.cpp b/src/common/imagtiff.cpp index 0df1139d8f..2501e91f3e 100644 --- a/src/common/imagtiff.cpp +++ b/src/common/imagtiff.cpp @@ -25,6 +25,7 @@ #if wxUSE_IMAGE && wxUSE_LIBTIFF #include "wx/imagtiff.h" +#include "wx/versioninfo.h" #ifndef WX_PRECOMP #include "wx/log.h" @@ -126,7 +127,7 @@ static toff_t wxFileOffsetToTIFF(wxFileOffset ofs) 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") ); + wxT("TIFF library doesn't support large files") ); return tofs; } @@ -270,7 +271,9 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos if (!tif) { if (verbose) + { wxLogError( _("TIFF: Error loading image.") ); + } return false; } @@ -278,7 +281,9 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos if (!TIFFSetDirectory( tif, (tdir_t)index )) { if (verbose) + { wxLogError( _("Invalid TIFF image index.") ); + } TIFFClose( tif ); @@ -291,33 +296,47 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w ); TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h ); + uint16 photometric; + uint16 samplesPerPixel; uint16 extraSamples; uint16* samplesInfo; + TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &samplesPerPixel); TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES, &extraSamples, &samplesInfo); - const bool hasAlpha = (extraSamples == 1 && - (samplesInfo[0] == EXTRASAMPLE_ASSOCALPHA || - samplesInfo[0] == EXTRASAMPLE_UNASSALPHA)); + if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric)) + { + photometric = PHOTOMETRIC_MINISWHITE; + } + const bool hasAlpha = (extraSamples >= 1 + && ((samplesInfo[0] == EXTRASAMPLE_UNSPECIFIED && samplesPerPixel > 3) + || samplesInfo[0] == EXTRASAMPLE_ASSOCALPHA + || samplesInfo[0] == EXTRASAMPLE_UNASSALPHA)) + || (extraSamples == 0 && samplesPerPixel == 4 + && photometric == PHOTOMETRIC_RGB); // guard against integer overflow during multiplication which could result // in allocating a too small buffer and then overflowing it - const double bytesNeeded = w * h * sizeof(uint32); + const double bytesNeeded = (double)w * (double)h * sizeof(uint32); if ( bytesNeeded >= wxUINT32_MAX ) { if ( verbose ) + { wxLogError( _("TIFF: Image size is abnormally big.") ); + } TIFFClose(tif); return false; } - raster = (uint32*) _TIFFmalloc( bytesNeeded ); + raster = (uint32*) _TIFFmalloc( (uint32)bytesNeeded ); if (!raster) { if (verbose) + { wxLogError( _("TIFF: Couldn't allocate memory.") ); + } TIFFClose( tif ); @@ -325,10 +344,12 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos } image->Create( (int)w, (int)h ); - if (!image->Ok()) + if (!image->IsOk()) { if (verbose) + { wxLogError( _("TIFF: Couldn't allocate memory.") ); + } _TIFFfree( raster ); TIFFClose( tif ); @@ -342,7 +363,9 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos if (!TIFFReadRGBAImage( tif, w, h, raster, 0 )) { if (verbose) + { wxLogError( _("TIFF: Error reading image.") ); + } _TIFFfree( raster ); image->Destroy(); @@ -379,42 +402,78 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos alpha -= 2*w; } - // set the image resolution if it's available + + uint16 spp, bpp, compression; + /* + Read some baseline TIFF tags which helps when re-saving a TIFF + to be similar to the original image. + */ + if ( TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &spp) ) + { + image->SetOption(wxIMAGE_OPTION_SAMPLESPERPIXEL, spp); + } + + if ( TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bpp) ) + { + image->SetOption(wxIMAGE_OPTION_BITSPERSAMPLE, bpp); + } + + if ( TIFFGetFieldDefaulted(tif, TIFFTAG_COMPRESSION, &compression) ) + { + image->SetOption(wxIMAGE_OPTION_COMPRESSION, compression); + } + + // Set the resolution unit. + wxImageResolution resUnit = wxIMAGE_RESOLUTION_NONE; uint16 tiffRes; - if ( TIFFGetField(tif, TIFFTAG_RESOLUTIONUNIT, &tiffRes) ) + if ( TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &tiffRes) ) { - wxImageResolution res; - switch ( tiffRes ) + switch (tiffRes) { default: wxLogWarning(_("Unknown TIFF resolution unit %d ignored"), - tiffRes); + tiffRes); // fall through case RESUNIT_NONE: - res = wxIMAGE_RESOLUTION_NONE; + resUnit = wxIMAGE_RESOLUTION_NONE; break; case RESUNIT_INCH: - res = wxIMAGE_RESOLUTION_INCHES; + resUnit = wxIMAGE_RESOLUTION_INCHES; break; case RESUNIT_CENTIMETER: - res = wxIMAGE_RESOLUTION_CM; + resUnit = wxIMAGE_RESOLUTION_CM; break; } + } - if ( res != wxIMAGE_RESOLUTION_NONE ) - { - float xres, yres; - if ( TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres) ) - image->SetOption(wxIMAGE_OPTION_RESOLUTIONX, wxRound(xres)); + image->SetOption(wxIMAGE_OPTION_RESOLUTIONUNIT, resUnit); - if ( TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres) ) - image->SetOption(wxIMAGE_OPTION_RESOLUTIONY, wxRound(yres)); - } + /* + Set the image resolution if it's available. Resolution tag is not + dependant on RESOLUTIONUNIT != RESUNIT_NONE (according to TIFF spec). + */ + float resX, resY; + + if ( TIFFGetField(tif, TIFFTAG_XRESOLUTION, &resX) ) + { + /* + Use a string value to not lose precision. + rounding to int as cm and then converting to inch may + result in whole integer rounding error, eg. 201 instead of 200 dpi. + If an app wants an int, GetOptionInt will convert and round down. + */ + image->SetOption(wxIMAGE_OPTION_RESOLUTIONX, + wxString::FromCDouble((double) resX)); } + if ( TIFFGetField(tif, TIFFTAG_YRESOLUTION, &resY) ) + { + image->SetOption(wxIMAGE_OPTION_RESOLUTIONY, + wxString::FromCDouble((double) resY)); + } _TIFFfree( raster ); @@ -436,7 +495,7 @@ int wxTIFFHandler::DoGetImageCount( wxInputStream& stream ) } while (TIFFReadDirectory(tif)); TIFFClose( tif ); - + // NOTE: this function modifies the current stream position but it's ok // (see wxImageHandler::GetImageCount) @@ -450,7 +509,9 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo if (!tif) { if (verbose) + { wxLogError( _("TIFF: Error saving image.") ); + } return false; } @@ -468,7 +529,7 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo switch ( res ) { default: - wxFAIL_MSG( _T("unknown image resolution units") ); + wxFAIL_MSG( wxT("unknown image resolution units") ); // fall through case wxIMAGE_RESOLUTION_NONE: @@ -530,7 +591,9 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo if (!buf) { if (verbose) + { wxLogError( _("TIFF: Couldn't allocate memory.") ); + } TIFFClose( tif ); @@ -576,7 +639,9 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo if ( TIFFWriteScanline(tif, buf ? buf : ptr, (uint32)row, 0) < 0 ) { if (verbose) + { wxLogError( _("TIFF: Error writing image.") ); + } TIFFClose( tif ); if (buf) @@ -609,4 +674,27 @@ bool wxTIFFHandler::DoCanRead( wxInputStream& stream ) #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