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/*****************************************************************************\
compression.h : Interface for BertCompress and BertUncompress
Copyright (c) 1996 - 2001, Hewlett-Packard Co.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of Hewlett-Packard nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PATENT INFRINGEMENT; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\*****************************************************************************/
#ifndef APDK_COMPRESSION_H
#define APDK_COMPRESSION_H
APDK_BEGIN_NAMESPACE
#define kUseOldBert 0
#define kBertDecompressPixelSize 3
// Follows are all the masks for the command byte.
#define kTypeMask 0x80
#define kTypeShiftAmount 7
#define kCacheLiteralBitsMask 0x60
#define kCacheLiteralBitsShiftAmount 5
#define kCacheBitsMask 0x60
#define kCacheBitsShiftAmount 5
#define kRoffMask 0x18
#define kRoffShiftAmount 3
#define kReplace_countMask 0x07
// Now have the compiler check to make sure none of the masks overlap/underlap bits accidently.
#if ((kTypeMask | kCacheLiteralBitsMask | kRoffMask | kReplace_countMask) != 255)
#error "Your mask bits are messed up!"
#endif
#if ((kTypeMask | kCacheBitsMask | kRoffMask | kReplace_countMask) != 255)
#error "Your mask bits are messed up!"
#endif
enum
{
eLiteral = 0,
eRLE = 0x80
};
enum
{
eeNewPixel = 0x0,
eeWPixel = 0x20,
eeNEPixel = 0x40,
eeCachedColor = 0x60,
};
enum
{
eNewColor = 0x0,
eWestColor = 0x1,
eNorthEastColor = 0x2,
eCachedColor = 0x3
};
// Literal
#define M10_MAX_OFFSET0 2 /* Largest unscaled value an offset can have before extra byte is needed. */
#define M10_MAX_COUNT0 6 /* Largest unscaled and unbiased value a count can have before extra byte is needed */
#define M10_COUNT_START0 1 /* What a count of zero has a value of. */
// RLE
#define M10_MAX_OFFSET1 2
#define M10_MAX_COUNT1 6
#define M10_COUNT_START1 2
//int BertCompress(unsigned char *currentRow, int byteCount, unsigned char *dest, unsigned char *seed, int pixelSizeInBytes);
int BertCompress(unsigned char *currentRow, unsigned char *seed, unsigned char *dest, int byteCount, int pixelSizeInBytes);
unsigned int decodeDataToPixel(const unsigned char *compressedDataPtr, int *CBI, const unsigned char *seedRowPtr, const int curPixel, int pixelSizeInBytes);
void BertUncompress(const unsigned char *compressedDataPtr,
unsigned char *seedRowPtr,
int numberOfCompressedBytes,
int pixelSizeInBytes,
int rowWidthInBytes,
int *firstPixelThatChanged,
int *lastPixelThatChanged);
/*unsigned int BertUncompress(const unsigned char *inPtr,
int ulInputBytes,
int ulOutputBytes,
unsigned char *ulSeedPtr,
unsigned char *ulOutPtr);
*/
APDK_END_NAMESPACE
#endif //APDK_COMPRESSION_H
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