public TiffGrid(string filename, string NewFileName)
{
ValuesToWrite = new Dictionary<int, Dictionary<int, double>>();
tiff_org = BitMiracle.LibTiff.Classic.Tiff.Open(Path.GetFullPath(filename), "r");
tiff = BitMiracle.LibTiff.Classic.Tiff.Open(Path.GetFullPath(NewFileName), "w");
foreach (TiffTag enu in Enum.GetValues(typeof(TiffTag)))
{
var val = tiff_org.GetField(enu);
if (val != null & enu != TiffTag.EXTRASAMPLES)
tiff.SetField(enu, val[0]);
}
for (int i = 0; i < tiff_org.GetTagListCount(); i++)
{
int k = tiff_org.GetTagListEntry(i);
var ff = tiff_org.FindFieldInfo((TiffTag)k, TiffType.ANY);
tiff.MergeFieldInfo(new TiffFieldInfo[] { ff }, 1);
var val = tiff_org.GetField((TiffTag)tiff_org.GetTagListEntry(i));
tiff.SetField((TiffTag)k, val[0], val[1]);
}
var val2 = tiff_org.GetField((TiffTag)33922)[1].ToDoubleArray();
XOrigin = val2[3];
YOrigin = val2[4]; //Upper basegrid assumes Lower
val2 = tiff_org.GetField((TiffTag)33550)[1].ToDoubleArray();
GridSize = val2[0];
GridSize = val2[1];
NumberOfColumns = tiff_org.GetField(TiffTag.IMAGEWIDTH)[0].ToInt();
NumberOfRows = tiff_org.GetField(TiffTag.IMAGELENGTH)[0].ToInt();
//Shift YOrigin to lower left
YOrigin -= GridSize * NumberOfRows;
scanline = new byte[tiff_org.ScanlineSize()];
bits = scanline.Count() / NumberOfColumns;
ScanLineCache = new Dictionary<int, byte[]>();
}
public bool Copy(Tiff inImage, Tiff outImage)
{
int width = 0;
FieldValue[] result = inImage.GetField(TiffTag.IMAGEWIDTH);
if (result != null)
{
width = result[0].ToInt();
outImage.SetField(TiffTag.IMAGEWIDTH, width);
}
int length = 0;
result = inImage.GetField(TiffTag.IMAGELENGTH);
if (result != null)
{
length = result[0].ToInt();
outImage.SetField(TiffTag.IMAGELENGTH, length);
}
short bitspersample = 1;
result = inImage.GetField(TiffTag.BITSPERSAMPLE);
if (result != null)
{
bitspersample = result[0].ToShort();
outImage.SetField(TiffTag.BITSPERSAMPLE, bitspersample);
}
short samplesperpixel = 1;
result = inImage.GetField(TiffTag.SAMPLESPERPIXEL);
if (result != null)
{
samplesperpixel = result[0].ToShort();
outImage.SetField(TiffTag.SAMPLESPERPIXEL, samplesperpixel);
}
if (m_compression != (Compression)(-1))
outImage.SetField(TiffTag.COMPRESSION, m_compression);
else
{
result = inImage.GetField(TiffTag.COMPRESSION);
if (result != null)
{
m_compression = (Compression)result[0].ToInt();
outImage.SetField(TiffTag.COMPRESSION, m_compression);
}
}
result = inImage.GetFieldDefaulted(TiffTag.COMPRESSION);
Compression input_compression = (Compression)result[0].ToInt();
result = inImage.GetFieldDefaulted(TiffTag.PHOTOMETRIC);
Photometric input_photometric = (Photometric)result[0].ToShort();
if (input_compression == Compression.JPEG)
{
/* Force conversion to RGB */
inImage.SetField(TiffTag.JPEGCOLORMODE, JpegColorMode.RGB);
}
else if (input_photometric == Photometric.YCBCR)
{
/* Otherwise, can't handle subsampled input */
result = inImage.GetFieldDefaulted(TiffTag.YCBCRSUBSAMPLING);
short subsamplinghor = result[0].ToShort();
short subsamplingver = result[1].ToShort();
if (subsamplinghor != 1 || subsamplingver != 1)
{
Console.Error.WriteLine("tiffcp: {0}: Can't copy/convert subsampled image.", inImage.FileName());
return false;
}
}
if (m_compression == Compression.JPEG)
{
if (input_photometric == Photometric.RGB && m_jpegcolormode == JpegColorMode.RGB)
outImage.SetField(TiffTag.PHOTOMETRIC, Photometric.YCBCR);
else
outImage.SetField(TiffTag.PHOTOMETRIC, input_photometric);
}
else if (m_compression == Compression.SGILOG || m_compression == Compression.SGILOG24)
{
outImage.SetField(TiffTag.PHOTOMETRIC, samplesperpixel == 1 ? Photometric.LOGL : Photometric.LOGLUV);
}
else
{
if (input_compression != Compression.JPEG)
copyTag(inImage, outImage, TiffTag.PHOTOMETRIC, 1, TiffType.SHORT);
}
if (m_fillorder != 0)
outImage.SetField(TiffTag.FILLORDER, m_fillorder);
else
copyTag(inImage, outImage, TiffTag.FILLORDER, 1, TiffType.SHORT);
/*
* Will copy `Orientation' tag from input image
*/
result = inImage.GetFieldDefaulted(TiffTag.ORIENTATION);
m_orientation = (Orientation)result[0].ToByte();
switch (m_orientation)
{
case Orientation.BOTRIGHT:
case Orientation.RIGHTBOT:
Tiff.Warning(inImage.FileName(), "using bottom-left orientation");
m_orientation = Orientation.BOTLEFT;
break;
case Orientation.LEFTBOT:
case Orientation.BOTLEFT:
break;
case Orientation.TOPRIGHT:
case Orientation.RIGHTTOP:
default:
Tiff.Warning(inImage.FileName(), "using top-left orientation");
m_orientation = Orientation.TOPLEFT;
break;
case Orientation.LEFTTOP:
case Orientation.TOPLEFT:
break;
}
outImage.SetField(TiffTag.ORIENTATION, m_orientation);
/*
* Choose tiles/strip for the output image according to
* the command line arguments (-tiles, -strips) and the
* structure of the input image.
*/
if (m_outtiled == -1)
{
if (inImage.IsTiled())
m_outtiled = 1;
else
m_outtiled = 0;
}
if (m_outtiled != 0)
{
/*
* Setup output file's tile width&height. If either
* is not specified, use either the value from the
* input image or, if nothing is defined, use the
* library default.
*/
if (m_tilewidth == -1)
{
result = inImage.GetFieldDefaulted(TiffTag.TILEWIDTH);
if (result != null)
m_tilewidth = result[0].ToInt();
}
if (m_tilelength == -1)
{
result = inImage.GetFieldDefaulted(TiffTag.TILELENGTH);
if (result != null)
m_tilelength = result[0].ToInt();
}
outImage.DefaultTileSize(ref m_tilewidth, ref m_tilelength);
outImage.SetField(TiffTag.TILEWIDTH, m_tilewidth);
outImage.SetField(TiffTag.TILELENGTH, m_tilelength);
}
else
{
/*
* RowsPerStrip is left unspecified: use either the
* value from the input image or, if nothing is defined,
* use the library default.
*/
if (m_rowsperstrip == 0)
{
result = inImage.GetField(TiffTag.ROWSPERSTRIP);
if (result == null)
m_rowsperstrip = outImage.DefaultStripSize(m_rowsperstrip);
else
m_rowsperstrip = result[0].ToInt();
if (m_rowsperstrip > length && m_rowsperstrip != -1)
m_rowsperstrip = length;
}
else if (m_rowsperstrip == -1)
m_rowsperstrip = length;
outImage.SetField(TiffTag.ROWSPERSTRIP, m_rowsperstrip);
}
if (m_config != PlanarConfig.UNKNOWN)
outImage.SetField(TiffTag.PLANARCONFIG, m_config);
else
{
result = inImage.GetField(TiffTag.PLANARCONFIG);
if (result != null)
{
m_config = (PlanarConfig)result[0].ToShort();
outImage.SetField(TiffTag.PLANARCONFIG, m_config);
}
}
if (samplesperpixel <= 4)
copyTag(inImage, outImage, TiffTag.TRANSFERFUNCTION, 4, TiffType.SHORT);
copyTag(inImage, outImage, TiffTag.COLORMAP, 4, TiffType.SHORT);
/* SMinSampleValue & SMaxSampleValue */
switch (m_compression)
{
case Compression.JPEG:
outImage.SetField(TiffTag.JPEGQUALITY, m_quality);
outImage.SetField(TiffTag.JPEGCOLORMODE, m_jpegcolormode);
break;
case Compression.LZW:
case Compression.ADOBE_DEFLATE:
case Compression.DEFLATE:
if (m_predictor != -1)
outImage.SetField(TiffTag.PREDICTOR, m_predictor);
else
{
result = inImage.GetField(TiffTag.PREDICTOR);
if (result != null)
{
m_predictor = result[0].ToShort();
outImage.SetField(TiffTag.PREDICTOR, m_predictor);
}
}
break;
case Compression.CCITTFAX3:
case Compression.CCITTFAX4:
if (m_compression == Compression.CCITTFAX3)
{
if (m_g3opts != Group3Opt.UNKNOWN)
outImage.SetField(TiffTag.GROUP3OPTIONS, m_g3opts);
else
{
result = inImage.GetField(TiffTag.GROUP3OPTIONS);
if (result != null)
{
m_g3opts = (Group3Opt)result[0].ToShort();
outImage.SetField(TiffTag.GROUP3OPTIONS, m_g3opts);
}
}
}
else
copyTag(inImage, outImage, TiffTag.GROUP4OPTIONS, 1, TiffType.LONG);
copyTag(inImage, outImage, TiffTag.BADFAXLINES, 1, TiffType.LONG);
copyTag(inImage, outImage, TiffTag.CLEANFAXDATA, 1, TiffType.LONG);
copyTag(inImage, outImage, TiffTag.CONSECUTIVEBADFAXLINES, 1, TiffType.LONG);
copyTag(inImage, outImage, TiffTag.FAXRECVPARAMS, 1, TiffType.LONG);
copyTag(inImage, outImage, TiffTag.FAXRECVTIME, 1, TiffType.LONG);
copyTag(inImage, outImage, TiffTag.FAXSUBADDRESS, 1, TiffType.ASCII);
break;
}
result = inImage.GetField(TiffTag.ICCPROFILE);
if (result != null)
outImage.SetField(TiffTag.ICCPROFILE, result[0], result[1]);
result = inImage.GetField(TiffTag.NUMBEROFINKS);
if (result != null)
{
short ninks = result[0].ToShort();
outImage.SetField(TiffTag.NUMBEROFINKS, ninks);
result = inImage.GetField(TiffTag.INKNAMES);
if (result != null)
{
string inknames = result[0].ToString();
string[] parts = inknames.Split(new char[] { '\0' });
int inknameslen = 0;
foreach (string part in parts)
inknameslen += part.Length + 1;
outImage.SetField(TiffTag.INKNAMES, inknameslen, inknames);
}
}
result = inImage.GetField(TiffTag.PAGENUMBER);
if (m_pageInSeq == 1)
{
if (m_pageNum < 0)
{
/* only one input file */
if (result != null)
outImage.SetField(TiffTag.PAGENUMBER, result[0], result[1]);
}
else
{
outImage.SetField(TiffTag.PAGENUMBER, m_pageNum++, 0);
}
}
else
{
if (result != null)
{
if (m_pageNum < 0)
{
/* only one input file */
outImage.SetField(TiffTag.PAGENUMBER, result[0], result[1]);
}
else
{
outImage.SetField(TiffTag.PAGENUMBER, m_pageNum++, 0);
}
}
}
int NTAGS = g_tags.Length;
for (int i = 0; i < NTAGS; i++)
{
tagToCopy p = g_tags[i];
copyTag(inImage, outImage, p.tag, p.count, p.type);
}
return pickFuncAndCopy(inImage, outImage, bitspersample, samplesperpixel, length, width);
}
private static void copyTag(Tiff inImage, Tiff outImage, TiffTag tag, short count, TiffType type)
{
FieldValue[] result = null;
switch (type)
{
case TiffType.SHORT:
result = inImage.GetField(tag);
if (result != null)
{
if (count == 1)
outImage.SetField(tag, result[0]);
else if (count == 2)
outImage.SetField(tag, result[0], result[1]);
else if (count == 4)
outImage.SetField(tag, result[0], result[1], result[2]);
else if (count == -1)
outImage.SetField(tag, result[0], result[1]);
}
break;
case TiffType.LONG:
result = inImage.GetField(tag);
if (result != null)
outImage.SetField(tag, result[0]);
break;
case TiffType.RATIONAL:
result = inImage.GetField(tag);
if (result != null)
outImage.SetField(tag, result[0]);
break;
case TiffType.ASCII:
result = inImage.GetField(tag);
if (result != null)
outImage.SetField(tag, result[0]);
break;
case TiffType.DOUBLE:
result = inImage.GetField(tag);
if (result != null)
outImage.SetField(tag, result[0]);
break;
default:
Tiff.Error(inImage.FileName(),
"Data type {0} is not supported, tag {1} skipped.", tag, type);
break;
}
}
static bool cvt_by_tile(Tiff inImage, Tiff outImage, int width, int height)
{
int tile_width = 0;
int tile_height = 0;
FieldValue[] result = inImage.GetField(TiffTag.TILEWIDTH);
if (result != null)
{
tile_width = result[0].ToInt();
result = inImage.GetField(TiffTag.TILELENGTH);
if (result != null)
tile_height = result[0].ToInt();
}
if (result == null)
{
Tiff.Error(inImage.FileName(), "Source image not tiled");
return false;
}
outImage.SetField(TiffTag.TILEWIDTH, tile_width);
outImage.SetField(TiffTag.TILELENGTH, tile_height);
// Allocate tile buffer
int raster_size = multiply(tile_width, tile_height);
int rasterByteSize = multiply(raster_size, sizeof(int));
if (raster_size == 0 || rasterByteSize == 0)
{
Tiff.Error(inImage.FileName(),
"Can't allocate buffer for raster of size {0}x{1}", tile_width, tile_height);
return false;
}
int[] raster = new int[raster_size];
byte[] rasterBytes = new byte[rasterByteSize];
// Allocate a scanline buffer for swapping during the vertical mirroring pass.
// (Request can't overflow given prior checks.)
int[] wrk_line = new int[tile_width];
// Loop over the tiles.
for (int row = 0; row < height; row += tile_height)
{
for (int col = 0; col < width; col += tile_width)
{
// Read the tile into an RGBA array
if (!inImage.ReadRGBATile(col, row, raster))
return false;
// For some reason the ReadRGBATile() function chooses the lower left corner
// as the origin. Vertically mirror scanlines.
for (int i_row = 0; i_row < tile_height / 2; i_row++)
{
int topIndex = tile_width * i_row * sizeof(int);
int bottomIndex = tile_width * (tile_height - i_row - 1) * sizeof(int);
Buffer.BlockCopy(raster, topIndex, wrk_line, 0, tile_width * sizeof(int));
Buffer.BlockCopy(raster, bottomIndex, raster, topIndex, tile_width * sizeof(int));
Buffer.BlockCopy(wrk_line, 0, raster, bottomIndex, tile_width * sizeof(int));
}
// Write out the result in a tile.
int tile = outImage.ComputeTile(col, row, 0, 0);
Buffer.BlockCopy(raster, 0, rasterBytes, 0, rasterByteSize);
if (outImage.WriteEncodedTile(tile, rasterBytes, rasterByteSize) == -1)
return false;
}
}
return true;
}
public bool tiffcvt(Tiff inImage, Tiff outImage)
{
FieldValue[] result = inImage.GetField(TiffTag.IMAGEWIDTH);
if (result == null)
return false;
int width = result[0].ToInt();
result = inImage.GetField(TiffTag.IMAGELENGTH);
if (result == null)
return false;
int height = result[0].ToInt();
copyField(inImage, outImage, TiffTag.SUBFILETYPE);
outImage.SetField(TiffTag.IMAGEWIDTH, width);
outImage.SetField(TiffTag.IMAGELENGTH, height);
outImage.SetField(TiffTag.BITSPERSAMPLE, 8);
outImage.SetField(TiffTag.COMPRESSION, m_compression);
outImage.SetField(TiffTag.PHOTOMETRIC, Photometric.RGB);
copyField(inImage, outImage, TiffTag.FILLORDER);
outImage.SetField(TiffTag.ORIENTATION, Orientation.TOPLEFT);
if (m_noAlpha)
outImage.SetField(TiffTag.SAMPLESPERPIXEL, 3);
else
outImage.SetField(TiffTag.SAMPLESPERPIXEL, 4);
if (!m_noAlpha)
{
short[] v = new short[1];
v[0] = (short)ExtraSample.ASSOCALPHA;
outImage.SetField(TiffTag.EXTRASAMPLES, 1, v);
}
copyField(inImage, outImage, TiffTag.XRESOLUTION);
copyField(inImage, outImage, TiffTag.YRESOLUTION);
copyField(inImage, outImage, TiffTag.RESOLUTIONUNIT);
outImage.SetField(TiffTag.PLANARCONFIG, PlanarConfig.CONTIG);
if (!m_testFriendly)
outImage.SetField(TiffTag.SOFTWARE, Tiff.GetVersion());
copyField(inImage, outImage, TiffTag.DOCUMENTNAME);
if (m_processByBlock && inImage.IsTiled())
return cvt_by_tile(inImage, outImage, width, height);
else if (m_processByBlock)
return cvt_by_strip(inImage, outImage, width, height);
return cvt_whole_image(inImage, outImage, width, height);
}
private static void copyField(Tiff inImage, Tiff outImage, TiffTag tag)
{
FieldValue[] result = inImage.GetField(tag);
if (result != null)
outImage.SetField(tag, result[0]);
}
/// <summary>
/// Read the whole image into one big RGBA buffer and then write out
/// strips from that. This is using the traditional TIFFReadRGBAImage()
/// API that we trust.
/// </summary>
private bool cvt_whole_image(Tiff inImage, Tiff outImage, int width, int height)
{
int pixel_count = width * height;
/* XXX: Check the integer overflow. */
if (width == 0 || height == 0 || (pixel_count / width) != height)
{
Tiff.Error(inImage.FileName(),
"Malformed input file; can't allocate buffer for raster of {0}x{1} size",
width, height);
return false;
}
m_rowsPerStrip = outImage.DefaultStripSize(m_rowsPerStrip);
outImage.SetField(TiffTag.ROWSPERSTRIP, m_rowsPerStrip);
int[] raster = new int[pixel_count];
/* Read the image in one chunk into an RGBA array */
if (!inImage.ReadRGBAImageOriented(width, height, raster, Orientation.TOPLEFT, false))
return false;
/*
* Do we want to strip away alpha components?
*/
byte[] rasterBytes;
int rasterByteSize;
if (m_noAlpha)
{
rasterByteSize = pixel_count * 3;
rasterBytes = new byte[rasterByteSize];
for (int i = 0, rasterBytesPos = 0; i < pixel_count; i++)
{
byte[] bytes = BitConverter.GetBytes(raster[i]);
rasterBytes[rasterBytesPos++] = bytes[0];
rasterBytes[rasterBytesPos++] = bytes[1];
rasterBytes[rasterBytesPos++] = bytes[2];
}
}
else
{
rasterByteSize = pixel_count * 4;
rasterBytes = new byte[rasterByteSize];
Buffer.BlockCopy(raster, 0, rasterBytes, 0, rasterByteSize);
}
/*
* Write out the result in strips
*/
for (int row = 0; row < height; row += m_rowsPerStrip)
{
int bytes_per_pixel;
if (m_noAlpha)
bytes_per_pixel = 3;
else
bytes_per_pixel = 4;
int rows_to_write;
if (row + m_rowsPerStrip > height)
rows_to_write = height - row;
else
rows_to_write = m_rowsPerStrip;
int offset = bytes_per_pixel * row * width;
int count = bytes_per_pixel * rows_to_write * width;
if (outImage.WriteEncodedStrip(row / m_rowsPerStrip, rasterBytes, offset, count) == -1)
return false;
}
return true;
}
private bool cvt_by_strip(Tiff inImage, Tiff outImage, int width, int height)
{
FieldValue[] result = inImage.GetField(TiffTag.ROWSPERSTRIP);
if (result == null)
{
Tiff.Error(inImage.FileName(), "Source image not in strips");
return false;
}
m_rowsPerStrip = result[0].ToInt();
outImage.SetField(TiffTag.ROWSPERSTRIP, m_rowsPerStrip);
// Allocate strip buffer
int raster_size = multiply(width, m_rowsPerStrip);
int rasterByteSize = multiply(raster_size, sizeof(int));
if (raster_size == 0 || rasterByteSize == 0)
{
Tiff.Error(inImage.FileName(),
"Can't allocate buffer for raster of size {0}x{1}", width, m_rowsPerStrip);
return false;
}
int[] raster = new int[raster_size];
byte[] rasterBytes = new byte[rasterByteSize];
// Allocate a scanline buffer for swapping during the vertical mirroring pass.
// (Request can't overflow given prior checks.)
int[] wrk_line = new int[width];
// Loop over the strips.
for (int row = 0; row < height; row += m_rowsPerStrip)
{
// Read the strip into an RGBA array
if (!inImage.ReadRGBAStrip(row, raster))
return false;
// Figure out the number of scanlines actually in this strip.
int rows_to_write;
if (row + m_rowsPerStrip > height)
rows_to_write = height - row;
else
rows_to_write = m_rowsPerStrip;
// For some reason the TIFFReadRGBAStrip() function chooses the lower left corner
// as the origin. Vertically mirror scanlines.
for (int i_row = 0; i_row < rows_to_write / 2; i_row++)
{
int topIndex = width * i_row * sizeof(int);
int bottomIndex = width * (rows_to_write - i_row - 1) * sizeof(int);
Buffer.BlockCopy(raster, topIndex, wrk_line, 0, width * sizeof(int));
Buffer.BlockCopy(raster, bottomIndex, raster, topIndex, width * sizeof(int));
Buffer.BlockCopy(wrk_line, 0, raster, bottomIndex, width * sizeof(int));
}
// Write out the result in a strip
int bytesToWrite = rows_to_write * width * sizeof(int);
Buffer.BlockCopy(raster, 0, rasterBytes, 0, bytesToWrite);
if (outImage.WriteEncodedStrip(row / m_rowsPerStrip, rasterBytes, bytesToWrite) == -1)
return false;
}
return true;
}
private static void convertToTiff(Bitmap bmp, Tiff tif, PixelFormat outputFormat)
{
if (outputFormat != PixelFormat.Format24bppRgb && outputFormat != PixelFormat.Format32bppArgb)
throw new System.ArgumentOutOfRangeException();
byte[] raster = getImageRasterBytes(bmp, outputFormat);
tif.SetField(TiffTag.IMAGEWIDTH, bmp.Width);
tif.SetField(TiffTag.IMAGELENGTH, bmp.Height);
tif.SetField(TiffTag.COMPRESSION, Compression.LZW);
tif.SetField(TiffTag.PHOTOMETRIC, Photometric.RGB);
tif.SetField(TiffTag.ROWSPERSTRIP, bmp.Height);
tif.SetField(TiffTag.XRESOLUTION, bmp.HorizontalResolution);
tif.SetField(TiffTag.YRESOLUTION, bmp.VerticalResolution);
tif.SetField(TiffTag.BITSPERSAMPLE, 8);
if (outputFormat == PixelFormat.Format32bppArgb)
tif.SetField(TiffTag.SAMPLESPERPIXEL, 4);
else
tif.SetField(TiffTag.SAMPLESPERPIXEL, 3);
tif.SetField(TiffTag.PLANARCONFIG, PlanarConfig.CONTIG);
int stride = raster.Length / bmp.Height;
convertRGBSamples(raster, bmp.Width, bmp.Height, outputFormat);
for (int i = 0, offset = 0; i < bmp.Height; i++)
{
bool res = tif.WriteScanline(raster, offset, i, 0);
Assert.IsTrue(res);
offset += stride;
}
}
/// <summary>
/// Creates new instance of the <see cref="TiffRgbaImage"/> class.
/// </summary>
/// <param name="tif">
/// The instance of the <see cref="BitMiracle.LibTiff.Classic"/> class used to retrieve
/// image data.
/// </param>
/// <param name="stopOnError">
/// if set to <c>true</c> then an error will terminate the conversion; otherwise "get"
/// methods will continue processing data until all the possible data in the image have
/// been requested.
/// </param>
/// <param name="errorMsg">The error message (if any) gets placed here.</param>
/// <returns>
/// New instance of the <see cref="TiffRgbaImage"/> class if the image specified
/// by <paramref name="tif"/> can be converted to RGBA format; otherwise, <c>null</c> is
/// returned and <paramref name="errorMsg"/> contains the reason why it is being
/// rejected.
/// </returns>
public static TiffRgbaImage Create(Tiff tif, bool stopOnError, out string errorMsg)
{
errorMsg = null;
// Initialize to normal values
TiffRgbaImage img = new TiffRgbaImage();
img.row_offset = 0;
img.col_offset = 0;
img.redcmap = null;
img.greencmap = null;
img.bluecmap = null;
img.req_orientation = Orientation.BOTLEFT; // It is the default
img.tif = tif;
img.stoponerr = stopOnError;
FieldValue[] result = tif.GetFieldDefaulted(TiffTag.BITSPERSAMPLE);
img.bitspersample = result[0].ToShort();
switch (img.bitspersample)
{
case 1:
case 2:
case 4:
case 8:
case 16:
break;
default:
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle images with {0}-bit samples", img.bitspersample);
return null;
}
img.alpha = 0;
result = tif.GetFieldDefaulted(TiffTag.SAMPLESPERPIXEL);
img.samplesperpixel = result[0].ToShort();
result = tif.GetFieldDefaulted(TiffTag.EXTRASAMPLES);
short extrasamples = result[0].ToShort();
byte[] sampleinfo = result[1].ToByteArray();
if (extrasamples >= 1)
{
switch ((ExtraSample)sampleinfo[0])
{
case ExtraSample.UNSPECIFIED:
if (img.samplesperpixel > 3)
{
// Workaround for some images without correct info about alpha channel
img.alpha = ExtraSample.ASSOCALPHA;
}
break;
case ExtraSample.ASSOCALPHA:
// data is pre-multiplied
case ExtraSample.UNASSALPHA:
// data is not pre-multiplied
img.alpha = (ExtraSample)sampleinfo[0];
break;
}
}
if (Tiff.DEFAULT_EXTRASAMPLE_AS_ALPHA)
{
result = tif.GetField(TiffTag.PHOTOMETRIC);
if (result == null)
img.photometric = Photometric.MINISWHITE;
if (extrasamples == 0 && img.samplesperpixel == 4 && img.photometric == Photometric.RGB)
{
img.alpha = ExtraSample.ASSOCALPHA;
extrasamples = 1;
}
}
int colorchannels = img.samplesperpixel - extrasamples;
result = tif.GetFieldDefaulted(TiffTag.COMPRESSION);
Compression compress = (Compression)result[0].ToInt();
result = tif.GetFieldDefaulted(TiffTag.PLANARCONFIG);
PlanarConfig planarconfig = (PlanarConfig)result[0].ToShort();
result = tif.GetField(TiffTag.PHOTOMETRIC);
if (result == null)
{
switch (colorchannels)
{
case 1:
if (img.isCCITTCompression())
img.photometric = Photometric.MINISWHITE;
else
img.photometric = Photometric.MINISBLACK;
break;
case 3:
img.photometric = Photometric.RGB;
break;
default:
errorMsg = string.Format(CultureInfo.InvariantCulture, "Missing needed {0} tag", photoTag);
return null;
}
}
else
img.photometric = (Photometric)result[0].ToInt();
switch (img.photometric)
{
case Photometric.PALETTE:
result = tif.GetField(TiffTag.COLORMAP);
if (result == null)
{
errorMsg = string.Format(CultureInfo.InvariantCulture, "Missing required \"Colormap\" tag");
return null;
}
short[] red_orig = result[0].ToShortArray();
short[] green_orig = result[1].ToShortArray();
short[] blue_orig = result[2].ToShortArray();
// copy the colormaps so we can modify them
int n_color = (1 << img.bitspersample);
img.redcmap = new ushort[n_color];
img.greencmap = new ushort[n_color];
img.bluecmap = new ushort[n_color];
Buffer.BlockCopy(red_orig, 0, img.redcmap, 0, n_color * sizeof(ushort));
Buffer.BlockCopy(green_orig, 0, img.greencmap, 0, n_color * sizeof(ushort));
Buffer.BlockCopy(blue_orig, 0, img.bluecmap, 0, n_color * sizeof(ushort));
if (planarconfig == PlanarConfig.CONTIG &&
img.samplesperpixel != 1 && img.bitspersample < 8)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle contiguous data with {0}={1}, and {2}={3} and Bits/Sample={4}",
photoTag, img.photometric, "Samples/pixel", img.samplesperpixel, img.bitspersample);
return null;
}
break;
case Photometric.MINISWHITE:
case Photometric.MINISBLACK:
if (planarconfig == PlanarConfig.CONTIG &&
img.samplesperpixel != 1 && img.bitspersample < 8)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle contiguous data with {0}={1}, and {2}={3} and Bits/Sample={4}",
photoTag, img.photometric, "Samples/pixel", img.samplesperpixel, img.bitspersample);
return null;
}
break;
case Photometric.YCBCR:
// It would probably be nice to have a reality check here.
if (planarconfig == PlanarConfig.CONTIG)
{
// can rely on LibJpeg.Net to convert to RGB
// XXX should restore current state on exit
switch (compress)
{
case Compression.JPEG:
// TODO: when complete tests verify complete desubsampling and
// YCbCr handling, remove use of JPEGCOLORMODE in favor of native
// handling
tif.SetField(TiffTag.JPEGCOLORMODE, JpegColorMode.RGB);
img.photometric = Photometric.RGB;
break;
default:
// do nothing
break;
}
}
// TODO: if at all meaningful and useful, make more complete support check
// here, or better still, refactor to let supporting code decide whether there
// is support and what meaningfull error to return
break;
case Photometric.RGB:
if (colorchannels < 3)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle RGB image with {0}={1}", "Color channels", colorchannels);
return null;
}
break;
case Photometric.SEPARATED:
result = tif.GetFieldDefaulted(TiffTag.INKSET);
InkSet inkset = (InkSet)result[0].ToByte();
if (inkset != InkSet.CMYK)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle separated image with {0}={1}", "InkSet", inkset);
return null;
}
if (img.samplesperpixel < 4)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle separated image with {0}={1}", "Samples/pixel", img.samplesperpixel);
return null;
}
break;
case Photometric.LOGL:
if (compress != Compression.SGILOG)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, LogL data must have {0}={1}", "Compression", Compression.SGILOG);
return null;
}
tif.SetField(TiffTag.SGILOGDATAFMT, 3); // 8-bit RGB monitor values.
img.photometric = Photometric.MINISBLACK; // little white lie
img.bitspersample = 8;
break;
case Photometric.LOGLUV:
if (compress != Compression.SGILOG && compress != Compression.SGILOG24)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, LogLuv data must have {0}={1} or {2}", "Compression", Compression.SGILOG, Compression.SGILOG24);
return null;
}
if (planarconfig != PlanarConfig.CONTIG)
{
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle LogLuv images with {0}={1}", "Planarconfiguration", planarconfig);
return null;
}
tif.SetField(TiffTag.SGILOGDATAFMT, 3); // 8-bit RGB monitor values.
img.photometric = Photometric.RGB; // little white lie
img.bitspersample = 8;
break;
case Photometric.CIELAB:
break;
default:
errorMsg = string.Format(CultureInfo.InvariantCulture,
"Sorry, can not handle image with {0}={1}", photoTag, img.photometric);
return null;
}
img.Map = null;
img.BWmap = null;
img.PALmap = null;
img.ycbcr = null;
img.cielab = null;
result = tif.GetField(TiffTag.IMAGEWIDTH);
img.width = result[0].ToInt();
result = tif.GetField(TiffTag.IMAGELENGTH);
img.height = result[0].ToInt();
result = tif.GetFieldDefaulted(TiffTag.ORIENTATION);
img.orientation = (Orientation)result[0].ToByte();
img.isContig = !(planarconfig == PlanarConfig.SEPARATE && colorchannels > 1);
if (img.isContig)
{
if (!img.pickContigCase())
{
errorMsg = "Sorry, can not handle image";
return null;
}
}
else
{
if (!img.pickSeparateCase())
{
errorMsg = "Sorry, can not handle image";
return null;
}
}
return img;
}
private static void SetTiffField(TiffInfo info, BitMiracle.LibTiff.Classic.Tiff image)
{
if (image == null)
{
throw new NullReferenceException("image");
}
// We need to set some values for basic tags before we can add any data
image.SetField(TiffTag.IMAGEWIDTH, info.Width);
image.SetField(TiffTag.IMAGELENGTH, info.Height);
image.SetField(TiffTag.BITSPERSAMPLE, info.BitsPerSample);
image.SetField(TiffTag.SAMPLESPERPIXEL, info.SamplesPerPixel);
image.SetField(TiffTag.ORIENTATION, info.Orientation);
image.SetField(TiffTag.ROWSPERSTRIP, info.Height);
image.SetField(TiffTag.XRESOLUTION, info.XResolution);
image.SetField(TiffTag.YRESOLUTION, info.YResolution);
image.SetField(TiffTag.RESOLUTIONUNIT, info.ResolutionUnit);
image.SetField(TiffTag.PLANARCONFIG, info.PlanarConfig);
image.SetField(TiffTag.PHOTOMETRIC, info.Photometric);
image.SetField(TiffTag.COMPRESSION, info.Compression);
image.SetField(TiffTag.FILLORDER, info.FillOrder);
}