X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9a83f860948059b0273b5cc6d9e43fadad3ebfca..a02b2a9d31b9ebc9cb13e0ea744169bc355e2ea0:/src/common/imagtiff.cpp?ds=sidebyside diff --git a/src/common/imagtiff.cpp b/src/common/imagtiff.cpp index 68bfd86c0f..b8fed7f83c 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" @@ -47,11 +48,7 @@ extern "C" #include "wx/wfstream.h" #ifndef TIFFLINKAGEMODE - #if defined(__WATCOMC__) && defined(__WXMGL__) - #define TIFFLINKAGEMODE cdecl - #else - #define TIFFLINKAGEMODE LINKAGEMODE - #endif + #define TIFFLINKAGEMODE LINKAGEMODE #endif // ============================================================================ @@ -109,7 +106,7 @@ wxTIFFHandler::wxTIFFHandler() m_name = wxT("TIFF file"); m_extension = wxT("tif"); m_altExtensions.Add(wxT("tiff")); - m_type = wxBITMAP_TYPE_TIF; + m_type = wxBITMAP_TYPE_TIFF; m_mime = wxT("image/tiff"); TIFFSetWarningHandler((TIFFErrorHandler) TIFFwxWarningHandler); TIFFSetErrorHandler((TIFFErrorHandler) TIFFwxErrorHandler); @@ -191,8 +188,42 @@ wxTIFFSeekOProc(thandle_t handle, toff_t off, int whence) { wxOutputStream *stream = (wxOutputStream*) handle; - return wxFileOffsetToTIFF(stream->SeekO((wxFileOffset)off, - wxSeekModeFromTIFF(whence))); + toff_t offset = wxFileOffsetToTIFF( + stream->SeekO((wxFileOffset)off, wxSeekModeFromTIFF(whence)) ); + + if (offset != (toff_t) -1 || whence != SEEK_SET) + { + return offset; + } + + + /* + Try to workaround problems with libtiff seeking past the end of streams. + + This occurs when libtiff is writing tag entries past the end of a + stream but hasn't written the directory yet (which will be placed + before the tags and contain offsets to the just written tags). + The behaviour for seeking past the end of a stream is not consistent + and doesn't work with for example wxMemoryOutputStream. When this type + of seeking fails (with SEEK_SET), fill in the gap with zeroes and try + again. + */ + + wxFileOffset streamLength = stream->GetLength(); + if (streamLength != wxInvalidOffset && (wxFileOffset) off > streamLength) + { + if (stream->SeekO(streamLength, wxFromStart) == wxInvalidOffset) + { + return (toff_t) -1; + } + + for (wxFileOffset i = 0; i < (wxFileOffset) off - streamLength; ++i) + { + stream->PutC(0); + } + } + + return wxFileOffsetToTIFF( stream->TellO() ); } int TIFFLINKAGEMODE @@ -295,13 +326,28 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w ); TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h ); + uint16 samplesPerPixel = 0; + (void) TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &samplesPerPixel); + + uint16 bitsPerSample = 0; + (void) TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bitsPerSample); + uint16 extraSamples; uint16* samplesInfo; TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES, &extraSamples, &samplesInfo); - const bool hasAlpha = (extraSamples == 1 && - (samplesInfo[0] == EXTRASAMPLE_ASSOCALPHA || - samplesInfo[0] == EXTRASAMPLE_UNASSALPHA)); + + uint16 photometric; + if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric)) + { + photometric = PHOTOMETRIC_MINISWHITE; + } + const bool hasAlpha = (extraSamples >= 1 + && ((samplesInfo[0] == EXTRASAMPLE_UNSPECIFIED) + || 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 @@ -333,7 +379,7 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos } image->Create( (int)w, (int)h ); - if (!image->Ok()) + if (!image->IsOk()) { if (verbose) { @@ -349,7 +395,77 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos if ( hasAlpha ) image->SetAlpha(); - if (!TIFFReadRGBAImage( tif, w, h, raster, 0 )) + uint16 planarConfig = PLANARCONFIG_CONTIG; + (void) TIFFGetField(tif, TIFFTAG_PLANARCONFIG, &planarConfig); + + bool ok = true; + char msg[1024] = ""; + if + ( + (planarConfig == PLANARCONFIG_CONTIG && samplesPerPixel == 2 + && extraSamples == 1) + && + ( + ( !TIFFRGBAImageOK(tif, msg) ) + || (bitsPerSample == 8) + ) + ) + { + const bool isGreyScale = (bitsPerSample == 8); + unsigned char *buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif)); + uint32 pos = 0; + const bool minIsWhite = (photometric == PHOTOMETRIC_MINISWHITE); + const int minValue = minIsWhite ? 255 : 0; + const int maxValue = 255 - minValue; + + /* + Decode to ABGR format as that is what the code, that converts to + wxImage, later on expects (normally TIFFReadRGBAImageOriented is + used to decode which uses an ABGR layout). + */ + for (uint32 y = 0; y < h; ++y) + { + if (TIFFReadScanline(tif, buf, y, 0) != 1) + { + ok = false; + break; + } + + if (isGreyScale) + { + for (uint32 x = 0; x < w; ++x) + { + uint8 val = minIsWhite ? 255 - buf[x*2] : buf[x*2]; + uint8 alpha = minIsWhite ? 255 - buf[x*2+1] : buf[x*2+1]; + raster[pos] = val + (val << 8) + (val << 16) + + (alpha << 24); + pos++; + } + } + else + { + for (uint32 x = 0; x < w; ++x) + { + int mask = buf[x*2/8] << ((x*2)%8); + + uint8 val = mask & 128 ? maxValue : minValue; + raster[pos] = val + (val << 8) + (val << 16) + + ((mask & 64 ? maxValue : minValue) << 24); + pos++; + } + } + } + + _TIFFfree(buf); + } + else + { + ok = TIFFReadRGBAImageOriented( tif, w, h, raster, + ORIENTATION_TOPLEFT, 0 ) != 0; + } + + + if (!ok) { if (verbose) { @@ -364,11 +480,8 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos } unsigned char *ptr = image->GetData(); - ptr += w*3*(h-1); - unsigned char *alpha = hasAlpha ? image->GetAlpha() : NULL; - if ( hasAlpha ) - alpha += w*(h-1); + unsigned char *alpha = image->GetAlpha(); uint32 pos = 0; @@ -384,49 +497,82 @@ bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos pos++; } + } + - // subtract line we just added plus one line: - ptr -= 2*w*3; - if ( hasAlpha ) - alpha -= 2*w; + image->SetOption(wxIMAGE_OPTION_TIFF_PHOTOMETRIC, photometric); + + uint16 compression; + /* + Copy some baseline TIFF tags which helps when re-saving a TIFF + to be similar to the original image. + */ + if (samplesPerPixel) + { + image->SetOption(wxIMAGE_OPTION_TIFF_SAMPLESPERPIXEL, samplesPerPixel); + } + + if (bitsPerSample) + { + image->SetOption(wxIMAGE_OPTION_TIFF_BITSPERSAMPLE, bitsPerSample); + } + + if ( TIFFGetFieldDefaulted(tif, TIFFTAG_COMPRESSION, &compression) ) + { + image->SetOption(wxIMAGE_OPTION_TIFF_COMPRESSION, compression); } - // set the image resolution if it's available + // 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 ); @@ -448,7 +594,7 @@ 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) @@ -469,8 +615,8 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo return false; } - TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT); - TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (uint32)image->GetWidth()); + const int imageWidth = image->GetWidth(); + TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (uint32) imageWidth); TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32)image->GetHeight()); TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT); TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG); @@ -506,39 +652,90 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo } - int spp = image->GetOptionInt(wxIMAGE_OPTION_SAMPLESPERPIXEL); + int spp = image->GetOptionInt(wxIMAGE_OPTION_TIFF_SAMPLESPERPIXEL); if ( !spp ) spp = 3; - int bpp = image->GetOptionInt(wxIMAGE_OPTION_BITSPERSAMPLE); - if ( !bpp ) - bpp = 8; + int bps = image->GetOptionInt(wxIMAGE_OPTION_TIFF_BITSPERSAMPLE); + if ( !bps ) + { + bps = 8; + } + else if (bps == 1) + { + // One bit per sample combined with 3 samples per pixel is + // not allowed and crashes libtiff. + spp = 1; + } + + int photometric = PHOTOMETRIC_RGB; - int compression = image->GetOptionInt(wxIMAGE_OPTION_COMPRESSION); - if ( !compression ) + if ( image->HasOption(wxIMAGE_OPTION_TIFF_PHOTOMETRIC) ) { - // we can't use COMPRESSION_LZW because current version of libtiff + photometric = image->GetOptionInt(wxIMAGE_OPTION_TIFF_PHOTOMETRIC); + if (photometric == PHOTOMETRIC_MINISWHITE + || photometric == PHOTOMETRIC_MINISBLACK) + { + // either b/w or greyscale + spp = 1; + } + } + else if (spp <= 2) + { + photometric = PHOTOMETRIC_MINISWHITE; + } + + const bool hasAlpha = image->HasAlpha(); + + int compression = image->GetOptionInt(wxIMAGE_OPTION_TIFF_COMPRESSION); + if ( !compression || (compression == COMPRESSION_JPEG && hasAlpha) ) + { + // 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 + // shouldn't use them by default -- and the only remaining one is none. + // Also JPEG compression for alpha images is not a good idea (viewers + // not opening the image properly). compression = COMPRESSION_NONE; } - TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, spp); - TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bpp); - TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, spp*bpp == 1 ? PHOTOMETRIC_MINISBLACK - : PHOTOMETRIC_RGB); + if + ( + (photometric == PHOTOMETRIC_RGB && spp == 4) + || (photometric <= PHOTOMETRIC_MINISBLACK && spp == 2) + ) + { + // Compensate for user passing a SamplesPerPixel that includes + // the alpha channel. + spp--; + } + + + int extraSamples = hasAlpha ? 1 : 0; + + TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, spp + extraSamples); + TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bps); + TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, photometric); TIFFSetField(tif, TIFFTAG_COMPRESSION, compression); - // scanlinesize if determined by spp and bpp - tsize_t linebytes = (tsize_t)image->GetWidth() * spp * bpp / 8; + if (extraSamples) + { + uint16 extra[] = { EXTRASAMPLE_UNSPECIFIED }; + TIFFSetField(tif, TIFFTAG_EXTRASAMPLES, (long) 1, &extra); + } - if ( (image->GetWidth() % 8 > 0) && (spp * bpp < 8) ) - linebytes+=1; + // scanlinesize is determined by spp+extraSamples and bps + const tsize_t linebytes = + (tsize_t)((imageWidth * (spp + extraSamples) * bps + 7) / 8); unsigned char *buf; - if (TIFFScanlineSize(tif) > linebytes || (spp * bpp < 24)) + const bool isColouredImage = (spp > 1) + && (photometric != PHOTOMETRIC_MINISWHITE) + && (photometric != PHOTOMETRIC_MINISBLACK); + + + if (TIFFScanlineSize(tif) > linebytes || !isColouredImage || hasAlpha) { buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif)); if (!buf) @@ -560,27 +757,84 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,TIFFDefaultStripSize(tif, (uint32) -1)); + const int bitsPerPixel = (spp + extraSamples) * bps; + const int bytesPerPixel = (bitsPerPixel + 7) / 8; + const int pixelsPerByte = 8 / bitsPerPixel; + int remainingPixelCount = 0; + + if (pixelsPerByte) + { + // How many pixels to write in the last byte column? + remainingPixelCount = imageWidth % pixelsPerByte; + if (!remainingPixelCount) remainingPixelCount = pixelsPerByte; + } + + const bool minIsWhite = (photometric == PHOTOMETRIC_MINISWHITE); unsigned char *ptr = image->GetData(); for ( int row = 0; row < image->GetHeight(); row++ ) { if ( buf ) { - if ( spp * bpp > 1 ) + if (isColouredImage) { - // color image - memcpy(buf, ptr, image->GetWidth()); + // colour image + if (hasAlpha) + { + for ( int column = 0; column < imageWidth; column++ ) + { + buf[column*4 ] = ptr[column*3 ]; + buf[column*4 + 1] = ptr[column*3 + 1]; + buf[column*4 + 2] = ptr[column*3 + 2]; + buf[column*4 + 3] = image->GetAlpha(column, row); + } + } + else + { + memcpy(buf, ptr, imageWidth * 3); + } + } + else if (spp * bps == 8) // greyscale image + { + for ( int column = 0; column < imageWidth; column++ ) + { + uint8 value = ptr[column*3 + 1]; + if (minIsWhite) + { + value = 255 - value; + } + + buf[column * bytesPerPixel] = value; + + if (hasAlpha) + { + value = image->GetAlpha(column, row); + buf[column*bytesPerPixel+1] + = minIsWhite ? 255 - value : value; + } + } } else // black and white image { for ( int column = 0; column < linebytes; column++ ) { uint8 reverse = 0; - for ( int bp = 0; bp < 8; bp++ ) + int pixelsPerByteCount = (column + 1 != linebytes) + ? pixelsPerByte + : remainingPixelCount; + for ( int bp = 0; bp < pixelsPerByteCount; bp++ ) { - if ( ptr[column*24 + bp*3] > 0 ) + if ( (ptr[column * 3 * pixelsPerByte + bp*3 + 1] <=127) + == minIsWhite ) { - // check only red as this is sufficient - reverse = (uint8)(reverse | 128 >> bp); + // check only green as this is sufficient + reverse |= (uint8) (128 >> (bp * bitsPerPixel)); + } + + if (hasAlpha + && (image->GetAlpha(column * pixelsPerByte + bp, + row) <= 127) == minIsWhite) + { + reverse |= (uint8) (64 >> (bp * bitsPerPixel)); } } @@ -603,7 +857,7 @@ bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo return false; } - ptr += image->GetWidth()*3; + ptr += imageWidth * 3; } (void) TIFFClose(tif); @@ -627,4 +881,27 @@ 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