예제 #1
0
        public static int TIFFWriteScanline(TIFF tif, byte[] buf, uint row, ushort sample)
        {
            string module="TIFFWriteScanline";

            if(!((tif.tif_flags&TIF_FLAGS.TIFF_BEENWRITING)!=0||TIFFWriteCheck(tif, false, module))) return -1;

            // Handle delayed allocation of data buffer. This
            // permits it to be sized more intelligently (using
            // directory information).
            if(!BUFFERCHECK(tif)) return -1;
            TIFFDirectory td=tif.tif_dir;
            bool imagegrew=false;

            // Extend image length if needed
            // (but only for PlanarConfig=1).
            if(row>=td.td_imagelength)
            {	// extend image
                if(td.td_planarconfig==PLANARCONFIG.SEPARATE)
                {
                    TIFFErrorExt(tif.tif_clientdata, tif.tif_name, "Can not change \"ImageLength\" when using separate planes");
                    return -1;
                }

                td.td_imagelength=row+1;
                imagegrew=true;
            }

            // Calculate strip and check for crossings.
            uint strip;
            if(td.td_planarconfig==PLANARCONFIG.SEPARATE)
            {
                if(sample>=td.td_samplesperpixel)
                {
                    TIFFErrorExt(tif.tif_clientdata, tif.tif_name, "{0}: Sample out of range, max {1}", sample, td.td_samplesperpixel);
                    return -1;
                }
                strip=sample*td.td_stripsperimage+row/td.td_rowsperstrip;
            }
            else strip=row/td.td_rowsperstrip;

            // Check strip array to make sure there's space. We don't support
            // dynamically growing files that have data organized in separate
            // bitplanes because it's too painful. In that case we require that
            // the imagelength be set properly before the first write (so that the
            // strips array will be fully allocated above).
            if(strip>=td.td_nstrips&&!TIFFGrowStrips(tif, 1, module)) return -1;

            if(strip!=tif.tif_curstrip)
            {
                // Changing strips -- flush any data present.
                if(!TIFFFlushData(tif)) return -1;

                tif.tif_curstrip=strip;

                // Watch out for a growing image. The value of strips/image
                // will initially be 1 (since it can't be deduced until the
                // imagelength is known).
                if(strip>=td.td_stripsperimage&&imagegrew) td.td_stripsperimage=TIFFhowmany(td.td_imagelength, td.td_rowsperstrip);

                tif.tif_row=(strip%td.td_stripsperimage)*td.td_rowsperstrip;
                if((tif.tif_flags&TIF_FLAGS.TIFF_CODERSETUP)==0)
                {
                    if(!tif.tif_setupencode(tif)) return -1;
                    tif.tif_flags|=TIF_FLAGS.TIFF_CODERSETUP;
                }

                tif.tif_rawcc=0;
                tif.tif_rawcp=0;

                if(td.td_stripbytecount[strip]>0)
                {
                    // Force TIFFAppendToStrip() to consider placing data at end of file.
                    tif.tif_curoff=0;
                }

                if(!tif.tif_preencode(tif, sample)) return -1;
                tif.tif_flags|=TIF_FLAGS.TIFF_POSTENCODE;
            }

            // Ensure the write is either sequential or at the
            // beginning of a strip (or that we can randomly
            // access the data -- i.e. no encoding).
            if(row!=tif.tif_row)
            {
                if(row<tif.tif_row)
                {
                    // Moving backwards within the same strip:
                    // backup to the start and then decode
                    // forward (below).
                    tif.tif_row=(strip%td.td_stripsperimage)*td.td_rowsperstrip;
                    tif.tif_rawcp=0;
                }

                // Seek forward to the desired row.
                if(!tif.tif_seek(tif, row-tif.tif_row)) return -1;
                tif.tif_row=row;
            }

            // swab if needed - note that source buffer will be altered
            tif.tif_postdecode(tif, buf, 0, (int)tif.tif_scanlinesize);

            bool status=tif.tif_encoderow(tif, buf, (int)tif.tif_scanlinesize, sample);

            // we are now poised at the beginning of the next row
            tif.tif_row=row+1;

            return status?1:0;
        }
예제 #2
0
        public static int TIFFWriteScanline(TIFF tif, byte[] buf, uint row, ushort sample)
        {
            string module = "TIFFWriteScanline";

            if (!((tif.tif_flags & TIF_FLAGS.TIFF_BEENWRITING) != 0 || TIFFWriteCheck(tif, false, module)))
            {
                return(-1);
            }

            // Handle delayed allocation of data buffer. This
            // permits it to be sized more intelligently (using
            // directory information).
            if (!BUFFERCHECK(tif))
            {
                return(-1);
            }
            TIFFDirectory td        = tif.tif_dir;
            bool          imagegrew = false;

            // Extend image length if needed
            // (but only for PlanarConfig=1).
            if (row >= td.td_imagelength)
            {                   // extend image
                if (td.td_planarconfig == PLANARCONFIG.SEPARATE)
                {
                    TIFFErrorExt(tif.tif_clientdata, tif.tif_name, "Can not change \"ImageLength\" when using separate planes");
                    return(-1);
                }

                td.td_imagelength = row + 1;
                imagegrew         = true;
            }

            // Calculate strip and check for crossings.
            uint strip;

            if (td.td_planarconfig == PLANARCONFIG.SEPARATE)
            {
                if (sample >= td.td_samplesperpixel)
                {
                    TIFFErrorExt(tif.tif_clientdata, tif.tif_name, "{0}: Sample out of range, max {1}", sample, td.td_samplesperpixel);
                    return(-1);
                }
                strip = sample * td.td_stripsperimage + row / td.td_rowsperstrip;
            }
            else
            {
                strip = row / td.td_rowsperstrip;
            }

            // Check strip array to make sure there's space. We don't support
            // dynamically growing files that have data organized in separate
            // bitplanes because it's too painful. In that case we require that
            // the imagelength be set properly before the first write (so that the
            // strips array will be fully allocated above).
            if (strip >= td.td_nstrips && !TIFFGrowStrips(tif, 1, module))
            {
                return(-1);
            }

            if (strip != tif.tif_curstrip)
            {
                // Changing strips -- flush any data present.
                if (!TIFFFlushData(tif))
                {
                    return(-1);
                }

                tif.tif_curstrip = strip;

                // Watch out for a growing image. The value of strips/image
                // will initially be 1 (since it can't be deduced until the
                // imagelength is known).
                if (strip >= td.td_stripsperimage && imagegrew)
                {
                    td.td_stripsperimage = TIFFhowmany(td.td_imagelength, td.td_rowsperstrip);
                }

                tif.tif_row = (strip % td.td_stripsperimage) * td.td_rowsperstrip;
                if ((tif.tif_flags & TIF_FLAGS.TIFF_CODERSETUP) == 0)
                {
                    if (!tif.tif_setupencode(tif))
                    {
                        return(-1);
                    }
                    tif.tif_flags |= TIF_FLAGS.TIFF_CODERSETUP;
                }

                tif.tif_rawcc = 0;
                tif.tif_rawcp = 0;

                if (td.td_stripbytecount[strip] > 0)
                {
                    // Force TIFFAppendToStrip() to consider placing data at end of file.
                    tif.tif_curoff = 0;
                }

                if (!tif.tif_preencode(tif, sample))
                {
                    return(-1);
                }
                tif.tif_flags |= TIF_FLAGS.TIFF_POSTENCODE;
            }

            // Ensure the write is either sequential or at the
            // beginning of a strip (or that we can randomly
            // access the data -- i.e. no encoding).
            if (row != tif.tif_row)
            {
                if (row < tif.tif_row)
                {
                    // Moving backwards within the same strip:
                    // backup to the start and then decode
                    // forward (below).
                    tif.tif_row   = (strip % td.td_stripsperimage) * td.td_rowsperstrip;
                    tif.tif_rawcp = 0;
                }

                // Seek forward to the desired row.
                if (!tif.tif_seek(tif, row - tif.tif_row))
                {
                    return(-1);
                }
                tif.tif_row = row;
            }

            // swab if needed - note that source buffer will be altered
            tif.tif_postdecode(tif, buf, 0, (int)tif.tif_scanlinesize);

            bool status = tif.tif_encoderow(tif, buf, (int)tif.tif_scanlinesize, sample);

            // we are now poised at the beginning of the next row
            tif.tif_row = row + 1;

            return(status?1:0);
        }