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| unsigned int | gcgPackRLE8 (unsigned int fullsize, unsigned char *srcdata, unsigned char *RLEdata) |
| | Packs a 8 bit sequence as a Run-Lenght Encoded block. More...
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| |
| unsigned int | gcgUnpackRLE8 (unsigned char *RLEdata, unsigned char *dstdata) |
| | Decompress a 8 bit Run-Length Encoded data coded with gcgPackRLE8(). More...
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| |
| unsigned int | gcgPackRLE32 (unsigned int fullsize, unsigned char *srcdata, unsigned char *RLEdata) |
| | Packs a 32 bit sequence as a Run-Lenght Encoded block. The parameter srcdata MUST be 4 aligned <=> fullsize MUST be multiple of 4. More...
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| |
| unsigned int | gcgUnpackRLE32 (unsigned char *RLEdata, unsigned char *dstdata) |
| | Decompress a 32 bit Run-Length Encoded data coded with gcgPackRLE32(). More...
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Run Length Encoding is a simple technique used for data compression. GCGlib provides functions for 8 bits and 32 bits encoding/decoding using RLE.
◆ gcgPackRLE32()
| unsigned int gcgPackRLE32 |
( |
unsigned int |
fullsize, |
|
|
unsigned char * |
srcdata, |
|
|
unsigned char * |
RLEdata |
|
) |
| |
Packs a 32 bit sequence as a Run-Lenght Encoded block. The parameter srcdata MUST be 4 aligned <=> fullsize MUST be multiple of 4.
- Parameters
-
| [in] | fullsize | size in bytes of the data stored in srcdata. It must be multiple of 4. |
| [in] | srcdata | pointer to the first byte of the 32bit sequence. |
| [out] | RLEdata | pointer to a buffer that has, at least, the same size of the source data fullsize. This buffer receives the compressed data if the compressed version is smaller than fullsize bytes. It might be changed even if the original data is smaller than the compressed version. First 4 bytes (unsigned int) of RLEdata receives its original size. Remaining bytes are the encoded data. It must be 4 aligned. |
- Returns
- the size in bytes of the compressed block or 0, if the compressed version is greather than original data.
- See also
- gcgUnpackRLE32
- Since
- 0.01.6
◆ gcgPackRLE8()
| unsigned int gcgPackRLE8 |
( |
unsigned int |
fullsize, |
|
|
unsigned char * |
srcdata, |
|
|
unsigned char * |
RLEdata |
|
) |
| |
Packs a 8 bit sequence as a Run-Lenght Encoded block.
- Parameters
-
| [in] | fullsize | size in bytes of the data stored in srcdata. |
| [in] | srcdata | pointer to the first byte of data. |
| [out] | RLEdata | pointer to a buffer that has, at least, the same size of the source data fullsize. This buffer receives the compressed data if the compressed version is smaller than fullsize bytes. It might be changed even if the original data is smaller than the compressed version. First 4 bytes (unsigned int) of RLEdata receives its original size. Remaining bytes are the encoded data. |
- Returns
- the size in bytes of the compressed block or 0, if the compressed version is greather than original data.
- See also
- gcgUnpackRLE8
- Since
- 0.01.6
◆ gcgUnpackRLE32()
| unsigned int gcgUnpackRLE32 |
( |
unsigned char * |
RLEdata, |
|
|
unsigned char * |
dstdata |
|
) |
| |
Decompress a 32 bit Run-Length Encoded data coded with gcgPackRLE32().
- Parameters
-
| [in] | RLEdata | pointer to the first byte of the data, compressed using gcgPackRLE8(). Its First 4 bytes (unsigned int) indicates the original size in bytes. |
| [out] | dstdata | pointer to a buffer that has, at least, the same size in bytes of the original data as indicated by the first 4 bytes (unsigned int) of RLEdata. |
- Returns
- the size in bytes of the uncompressed data or 0, if an error occurs during the decompression.
- See also
- gcgPackRLE32
- Since
- 0.01.6
◆ gcgUnpackRLE8()
| unsigned int gcgUnpackRLE8 |
( |
unsigned char * |
RLEdata, |
|
|
unsigned char * |
dstdata |
|
) |
| |
Decompress a 8 bit Run-Length Encoded data coded with gcgPackRLE8().
- Parameters
-
| [in] | RLEdata | pointer to the first byte of the data, compressed using gcgPackRLE8(). Its First 4 bytes (unsigned int) indicates the original size in bytes. |
| [out] | dstdata | pointer to a buffer that has, at least, the same size in bytes of the original data as indicated by the first 4 bytes (unsigned int) of RLEdata. |
- Returns
- the size in bytes of the uncompressed data or 0, if an error occurs during the decompression.
- See also
- gcgPackRLE8
- Since
- 0.01.6
1.8.13