Bee Eee Blog

public static ImageArray LoadTiff(String Image_Path)
{
    ImageArray arr = null;
    unsafe
    {
        UInt32 w = 0;
        UInt32 h = 0;
        uint samples = 3;
        uint bits = 8;
        int i, j, ptr, lptr;

        int tif = TIFFOpen(Image_Path, "r");

        if (0 != tif)
        {
            TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, ref w);
            TIFFGetField(tif, TIFFTAG_IMAGELENGTH, ref h);
            TIFFGetField(tif, TIFFTAG_BITSPERSAMPLE, ref bits);
            TIFFGetField(tif, TIFFTAG_SAMPLESPERPIXEL, ref samples);
            arr = new ImageArray((int)w, (int)h);

            // make sure we get all of the data.
            if (bits == 16)
            {
                UInt32 size = w;
                ushort* raster = (ushort *)_TIFFmalloc((uint)(size * sizeof(ushort) * samples));
                // read in all of the lines
                for (j = 0; j < h; j++)
                {
                    TIFFReadScanline(tif, (byte *)raster, j, 0);
                    // copy line into data
                    for (i = 0, ptr=0; i < w; i++, ptr+=(int)samples)
                    {
                        if (samples == 3)
                        {
                            arr.Data[i + j * w].SetPixel(raster[i], raster[i + 1], raster[i + 2]);
                        }
                        else
                        {
                            ushort val = raster[i + samples - 1];
                            arr.Data[i + j * w].SetPixel(val,val,val);
                        }
                    }
                }

                _TIFFfree((byte *)raster);
            }
            else
            {
                // anything beside 16 bit
                UInt32 size = h * w;
                byte *raster = _TIFFmalloc( size );
                int val = TIFFReadRGBAImage(tif, w, h, raster, 0);
                // copy image data into a bitmap
                if (val != 0)
                {
                    for (j = 0, ptr = 0, lptr=0; j < h; j++)
                    {
                        for (i = 0; i < w; i++, ptr+=4, ptr++)
                        {
                            arr.Data[ptr].SetPixel((ushort)raster[lptr], (ushort)raster[lptr + 1], (ushort)raster[lptr + 2]);
                        } // for i
                    } // for j
                } // if val

                _TIFFfree(raster);
            }
            TIFFClose(tif);
        } // if tif
    } // unsafe

    return arr;
}