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| unsigned int | gcgCompressImageRLE8 (unsigned int width, unsigned int height, unsigned char *srcdata, unsigned char *RLEdata) |
| | Compress a 8 bit bitmap image as a Run-Lenght Encoded block. More...
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| |
| unsigned int | gcgDecompressImageRLE8 (unsigned int width, unsigned int height, unsigned char *RLEdata, unsigned char *dstdata) |
| | Decompress a bit Run-Length Encoded 8 bits bitmap image. It receives a compressed block of a Windows .bmp image or the result of the compression with gcgCompressImageRLE8(). More...
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| unsigned int | gcgDecompressImageRLE4 (unsigned int width, unsigned int height, unsigned char *RLEdata, unsigned char *dstdata) |
| | Decompress a bit Run-Length Encoded 4 bits bitmap image. It receives a compressed block of a Windows .bmp image. More...
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| |
GCGlib provides functions for encoding/decoding image bitmaps (Windows .bmp standard) using RLE.
◆ gcgCompressImageRLE8()
| unsigned int gcgCompressImageRLE8 |
( |
unsigned int |
width, |
|
|
unsigned int |
height, |
|
|
unsigned char * |
srcdata, |
|
|
unsigned char * |
RLEdata |
|
) |
| |
Compress a 8 bit bitmap image as a Run-Lenght Encoded block.
- Parameters
-
| [in] | width | number of columns of the image to be compressed. |
| [in] | height | number of rows of the image to be compressed. |
| [in] | srcdata | pointer to the 8 bits bitmap image to be compressed. |
| [out] | RLEdata | pointer to a buffer that has, at least, the same size of the source bitmap image. This buffer receives the compressed data if the compressed version is smaller than the original image, taking into account a number of columns multiple of four. It might be changed even if the original data is smaller than the compressed version. |
- Returns
- returns the size in bytes of the compressed image or 0, if the compressed version is greater than original data.
- See also
- gcgDecompressImageRLE4
-
gcgDecompressImageRLE8
- Since
- 0.01.6
◆ gcgDecompressImageRLE4()
| unsigned int gcgDecompressImageRLE4 |
( |
unsigned int |
width, |
|
|
unsigned int |
height, |
|
|
unsigned char * |
RLEdata, |
|
|
unsigned char * |
dstdata |
|
) |
| |
Decompress a bit Run-Length Encoded 4 bits bitmap image. It receives a compressed block of a Windows .bmp image.
- Parameters
-
| [in] | width | number of columns of the image to be decompressed. |
| [in] | height | number of rows of the image to be decompressed. |
| [in] | RLEdata | pointer to the first byte of the data, obtained from a Windows .bmp 4 bits image. |
| [out] | dstdata | pointer to a buffer that has, at least, the same size in bytes of the uncompressed image, taking into account an image row size multiple of four bytes. |
- Returns
- the size in bytes of the uncompressed image or 0, if an error occurs during the decompression.
- See also
- gcgDecompressImageRLE8
- Since
- 0.01.6
◆ gcgDecompressImageRLE8()
| unsigned int gcgDecompressImageRLE8 |
( |
unsigned int |
width, |
|
|
unsigned int |
height, |
|
|
unsigned char * |
RLEdata, |
|
|
unsigned char * |
dstdata |
|
) |
| |
Decompress a bit Run-Length Encoded 8 bits bitmap image. It receives a compressed block of a Windows .bmp image or the result of the compression with gcgCompressImageRLE8().
- Parameters
-
| [in] | width | number of columns of the image to be decompressed. |
| [in] | height | number of rows of the image to be decompressed. |
| [in] | RLEdata | pointer to the first byte of the data, compressed using gcgCompressImageRLE8() or obtained from a Windows .bmp 8 bits image. |
| [out] | dstdata | pointer to a buffer that has, at least, the same size in bytes of the uncompressed image, taking into account an image row size multiple of four bytes. |
- Returns
- the size in bytes of the uncompressed image or 0, if an error occurs during the decompression.
- See also
- gcgCompressImageRLE8
-
gcgDecompressImageRLE4
- Since
- 0.01.6
1.8.13