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/*****************************************************************************\
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Mode9.cpp : implementaiton of Mode9 class
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Copyright (c) 1996 - 2001, Hewlett-Packard Co.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of Hewlett-Packard nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PATENT INFRINGEMENT; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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\*****************************************************************************/
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Mode9::Mode9 (unsigned int RasterSize, bool bPackedBits)
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: Compressor(RasterSize, true)
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if (constructor_error != NO_ERROR) // if error in base constructor
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// Allocate double the RasterSize to accommodate worst case
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compressBuf = (BYTE*) new BYTE[RasterSize * 2];
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if (compressBuf == NULL)
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constructor_error=ALLOCMEM_ERROR;
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memset(compressBuf, 0, RasterSize * 2);
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memset(SeedRow,0,RasterSize);
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m_bPackedBits = bPackedBits;
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////////////////////////////////////////////////////////////////////////////
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unsigned char comchar; /* command byte as char */
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#if defined(APDK_LITTLE_ENDIAN) || defined(LITTLE_ENDIAN_HW)
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unsigned replace_count:3; /* replace count 1-7, 8=8+next byte */
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unsigned roff:4; /* relative offset 0-14, 15=15+next byte */
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unsigned type:1; /* type of replacement: 0=mode0, 1=mode1 */
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unsigned type:1; /* type of replacement: 0=mode0, 1=mode1 */
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unsigned roff:4; /* relative offset 0-14, 15=15+next byte */
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unsigned replace_count:3; /* replace count 1-7, 8=8+next byte */
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#if defined(APDK_LITTLE_ENDIAN) || defined(LITTLE_ENDIAN_HW)
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unsigned replace_count:5; /* replace count 2-32, 33=33+next byte */
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unsigned roff:2; /* relative offset 0-2, 3=3+next byte */
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unsigned type:1; /* type of replacement: 0=mode0, 1=mode1 */
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unsigned type:1; /* type of replacement: 0=mode0, 1=mode1 */
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unsigned roff:2; /* relative offset 0-2, 3=3+next byte */
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unsigned replace_count:5; /* replace count 2-32, 33=33+next byte */
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#define MIN(a,b) (((a)>=(b))?(b):(a))
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#define MAX_OFFSET0 14 /* Largest unscaled value an offset can have before extra byte is needed. */
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#define OFFSET_START0 0
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#define MAX_COUNT0 6 /* Largest unscaled value a count can have before extra byte is needed */
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#define COUNT_START0 1 /* What a count of zero has a value of. */
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#define OFFSET_START1 0
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#define COUNT_START1 2
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//*********************************************************
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// This is based on code that came from Kevin Hudson.
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memset (SeedRow, 0, inputsize);
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bool Mode9::Process(RASTERDATA* input)
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// compresses input data,
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// result in Mode9::compressbuf,
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// updates compressedsize
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(input->rasterdata[COLORTYPE_COLOR]==NULL && input->rasterdata[COLORTYPE_BLACK]==NULL)) // flushing pipeline
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if (!ResetSeedRow && input->rasterdata[myplane] == 0)
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memset(compressBuf, 0, inputsize * 2);
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unsigned int originalsize=input->rastersize[myplane];
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unsigned int size=input->rastersize[myplane];
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// Convert 8 bit per pixel data into 1 bit per pixel data
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if (myplane == COLORTYPE_BLACK)
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if (input->rasterdata[myplane] == 0)
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memset(originalKData, 0, inputsize+1);
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size = originalsize = inputsize;
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size = originalsize = (input->rastersize[myplane]+7)/8;
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memset(originalKData, 0, size);
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memcpy(originalKData, input->rasterdata[myplane], size);
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int curBit = 0x80, curByte = 0;
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for (int i=0; i<input->rastersize[myplane]; i++)
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if (input->rasterdata[myplane][i])
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originalKData[curByte] |= curBit;
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curBit = curBit >> 1;
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if ((myphase) && (myphase->prev)) // if in pipeline, as opposed to autonomous call
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layer = myphase->prev->Exec->iRastersDelivered;
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if (myplane == COLORTYPE_BLACK)
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layer--; // using as offset
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char *sptr = (char *)(&SeedRow[size*layer]);
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if (myplane == COLORTYPE_BLACK)
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nptr = originalKData;
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nptr = input->rasterdata[myplane];
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unsigned int offset,byte_count,rem_count;
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Mode9_comtype command;
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char* dest= (char*) compressBuf;
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register char *dptr=dest;
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/* find a difference between the seed row and this row. */
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while ((*sptr++ == *nptr++) && (offset < size) )
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if ( offset >= size ) /* too far to find diff, bail */
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if ((*nptr != nptr[1]) || (size < 2)) /************ if doing a mode 0 **********/
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command.bitf0.type = 0;
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last_byte = *nptr++; /* keep track of the last_byte */
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sptr++; /* seed pointer must keep up with nptr */
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/* Now find all of the bytes in a row that don't match
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either a run of mode3 or mode 1. A slight
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optimization here would be to not jump out of this
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run of mode 0 for a single mode 3 or two mode 1
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bytes if we have to jump right back into mode 0,
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especially if there are already 7 mode 0 bytes here
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(we've already spent the extra byte for the
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while ((*sptr++ != *nptr) && (last_byte != *nptr) && (byte_count < size))
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/* Adjust the count if the last_byte == current_byte.
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Save these bytes for the upcomming run of mode 1. */
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if ((byte_count < size) && (last_byte == (char)*nptr))
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nptr--; /* Now sptr points to first byte in the new run of mode 1. */
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/* Now output full command. If offset is over 14 then
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need optional offset bytes. If byte count is over 7
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then need optional byte count. */
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if (offset > (MAX_OFFSET0+OFFSET_START0))
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command.bitf0.roff = MAX_OFFSET0+1;
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command.bitf0.roff = offset-OFFSET_START0;
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if (byte_count > (MAX_COUNT0+COUNT_START0))
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command.bitf0.replace_count = MAX_COUNT0+1;
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command.bitf0.replace_count = byte_count-COUNT_START0;
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*dptr++ = command.comchar;
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if (offset > (MAX_OFFSET0+OFFSET_START0))
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offset -= (MAX_OFFSET0+OFFSET_START0+1);
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*dptr++ = MIN ( offset, 255 );
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offset -= MIN ( offset, 255 );
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if (byte_count > (MAX_COUNT0+COUNT_START0))
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rem_count = byte_count - (MAX_COUNT0+COUNT_START0+1);
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*dptr++ = MIN ( rem_count, 255 );
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if ( rem_count == 255 )
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rem_count -= MIN ( rem_count, 255 );
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/* Now output the run of bytes. First set up a pointer to the first source byte. */
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tempPtr = nptr - byte_count;
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for(;byte_count;byte_count--)
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*dptr++ = *tempPtr++;
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} else /************ If doing a mode 1 *************/
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/* mode 1, next two bytes are equal */
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command.bitf1.type = 1;
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while ((last_byte == *nptr++) && (byte_count < size))
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if (offset > (MAX_OFFSET1+OFFSET_START1))
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command.bitf1.roff = MAX_OFFSET1+1;
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command.bitf1.roff = offset-OFFSET_START1;
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if (byte_count > (MAX_COUNT1+COUNT_START1))
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command.bitf1.replace_count = MAX_COUNT1+1;
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command.bitf1.replace_count = byte_count-COUNT_START1;
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*dptr++ = command.comchar;
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if (offset > (MAX_OFFSET1+OFFSET_START1))
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offset -= (MAX_OFFSET1+OFFSET_START1+1);
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*dptr++ = MIN ( offset, 255 );
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offset -= MIN ( offset, 255 );
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} /* if (offset > MAX... */
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if (byte_count > (MAX_COUNT1+COUNT_START1))
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rem_count = byte_count - (MAX_COUNT1+COUNT_START1+1);
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*dptr++ = MIN ( rem_count, 255 );
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if ( rem_count == 255 )
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rem_count -= MIN ( rem_count, 255 );
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} /* if (byte_count > ... */
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*dptr++ = last_byte; /* Now output the repeated byte. */
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} /* while (size > 0) */
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size = static_cast<int>((dptr - dest));
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compressedsize = size;
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if (myplane == COLORTYPE_BLACK)
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memcpy(&(SeedRow[layer*originalsize]), originalKData, originalsize);
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memcpy(&(SeedRow[layer*originalsize]), input->rasterdata[myplane], originalsize);
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bool Mode9::NextOutputRaster(RASTERDATA& next_raster)
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// since we return 1-for-1, just return result first call
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if (iRastersReady==0){
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if (myplane == COLORTYPE_BLACK)
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if (compressedsize != 0)
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next_raster.rastersize[COLORTYPE_BLACK] = compressedsize;
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next_raster.rasterdata[COLORTYPE_BLACK] = compressBuf;
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next_raster.rastersize[COLORTYPE_BLACK] = 0;
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next_raster.rasterdata[COLORTYPE_BLACK] = raster.rasterdata[COLORTYPE_BLACK];
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next_raster.rastersize[COLORTYPE_COLOR] = raster.rastersize[COLORTYPE_COLOR];
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next_raster.rasterdata[COLORTYPE_COLOR] = raster.rasterdata[COLORTYPE_COLOR];
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if (myplane == COLORTYPE_COLOR)
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if (compressedsize != 0)
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next_raster.rastersize[COLORTYPE_COLOR] = compressedsize;
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next_raster.rasterdata[COLORTYPE_COLOR] = compressBuf;
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next_raster.rastersize[COLORTYPE_COLOR] = 0;
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next_raster.rasterdata[COLORTYPE_COLOR] = raster.rasterdata[COLORTYPE_COLOR];
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next_raster.rastersize[COLORTYPE_BLACK] = raster.rastersize[COLORTYPE_BLACK];
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next_raster.rasterdata[COLORTYPE_BLACK] = raster.rasterdata[COLORTYPE_BLACK];