Wrapper class to the IJG JPEG library.
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#include <JPEGCompressor.h>
List of all members.
Public Member Functions |
| JPEGCompressor (int quality) |
| Constructor.
|
void | setQuality (int factor) |
| Set the compression quality.
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int | getQuality () |
| Get the current quality level.
|
void | InitCompression (RawTile &rawtile, unsigned int strip_height) throw (std::string) |
| Initialise strip based compression.
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unsigned int | CompressStrip (unsigned char *s, unsigned int tile_height) throw (std::string) |
| Compress a strip of image data.
|
unsigned int | Finish () throw (std::string) |
| Finish the strip based compression and free memory.
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int | Compress (RawTile &t) throw (std::string) |
| Compress an entire buffer of image data at once in one command.
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unsigned int | getHeaderSize () |
| Return the JPEG header size.
|
unsigned char * | getHeader () |
| Return a pointer to the header itself.
|
Detailed Description
Wrapper class to the IJG JPEG library.
Constructor & Destructor Documentation
JPEGCompressor::JPEGCompressor |
( |
int |
quality | ) |
|
|
inline |
Constructor.
- Parameters:
-
quality | JPEG Quality factor (0-100) |
Member Function Documentation
int JPEGCompressor::Compress |
( |
RawTile & |
t | ) |
throw (std::string) |
Compress an entire buffer of image data at once in one command.
- Parameters:
-
unsigned int JPEGCompressor::CompressStrip |
( |
unsigned char * |
s, |
|
|
unsigned int |
tile_height |
|
) |
| throw (std::string) |
Compress a strip of image data.
- Parameters:
-
s | source image data |
tile_height | pixel height of the tile we are compressing |
void JPEGCompressor::InitCompression |
( |
RawTile & |
rawtile, |
|
|
unsigned int |
strip_height |
|
) |
| throw (std::string) |
Initialise strip based compression.
If we are doing a strip based encoding, we need to first initialise with InitCompression, then compress a single strip at a time using CompressStrip and finally clean up using Finish
- Parameters:
-
rawtile | tile containing the image to be compressed |
strip_height | pixel height of the strip we want to compress |
void JPEGCompressor::setQuality |
( |
int |
factor | ) |
|
|
inline |
Set the compression quality.
- Parameters:
-
factor | Quality factor (0-100) |
The documentation for this class was generated from the following file: