Wrapper class to the IJG JPEG library.
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#include <JPEGCompressor.h>
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| JPEGCompressor (int quality) |
| Constructor.
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void | setQuality (int factor) |
| Set the compression quality.
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int | getQuality () |
| Get the current quality level.
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void | InitCompression (const RawTile &rawtile, unsigned int strip_height) |
| Initialise strip based compression.
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unsigned int | CompressStrip (unsigned char *s, unsigned char *o, unsigned int tile_height) |
| Compress a strip of image data.
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unsigned int | Finish (unsigned char *output) |
| Finish the strip based compression and free memory.
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unsigned int | Compress (RawTile &t) |
| Compress an entire buffer of image data at once in one command.
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unsigned int | getHeaderSize () |
| Return the JPEG header size.
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unsigned char * | getHeader () |
| Return a pointer to the header itself.
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const char * | getMimeType () |
| Return the JPEG mime type.
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const char * | getSuffix () |
| Return the image filename suffix.
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int | getQuality () |
| Get the current quality level.
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void | setICCProfile (const std::string &profile) |
| Set the ICC profile.
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void | setXMPMetadata (const std::string &x) |
| Set XMP metadata.
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virtual void | addXMPMetadata (const std::string &m) |
| Add metadata to the image header.
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int | Q |
| Quality level.
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std::string | icc |
| ICC Profile.
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std::string | xmp |
| XMP metadata.
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Wrapper class to the IJG JPEG library.
◆ JPEGCompressor()
JPEGCompressor::JPEGCompressor |
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int |
quality | ) |
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inline |
Constructor.
- Parameters
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quality | JPEG Quality factor (0-100) |
◆ Compress()
unsigned int JPEGCompressor::Compress |
( |
RawTile & |
t | ) |
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virtual |
Compress an entire buffer of image data at once in one command.
- Parameters
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Reimplemented from Compressor.
◆ CompressStrip()
unsigned int JPEGCompressor::CompressStrip |
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unsigned char * |
s, |
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unsigned char * |
o, |
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unsigned int |
tile_height |
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virtual |
Compress a strip of image data.
- Parameters
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s | source image data |
o | output buffer |
tile_height | pixel height of the tile we are compressing |
Reimplemented from Compressor.
◆ Finish()
unsigned int JPEGCompressor::Finish |
( |
unsigned char * |
output | ) |
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virtual |
Finish the strip based compression and free memory.
- Parameters
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- Returns
- size of output generated
Reimplemented from Compressor.
◆ getHeader()
unsigned char * JPEGCompressor::getHeader |
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inlinevirtual |
Return a pointer to the header itself.
Reimplemented from Compressor.
◆ getHeaderSize()
unsigned int JPEGCompressor::getHeaderSize |
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inlinevirtual |
Return the JPEG header size.
Reimplemented from Compressor.
◆ getMimeType()
const char * JPEGCompressor::getMimeType |
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inlinevirtual |
Return the JPEG mime type.
Reimplemented from Compressor.
◆ getSuffix()
const char * JPEGCompressor::getSuffix |
( |
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inlinevirtual |
Return the image filename suffix.
Reimplemented from Compressor.
◆ InitCompression()
void JPEGCompressor::InitCompression |
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const RawTile & |
rawtile, |
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unsigned int |
strip_height |
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) |
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virtual |
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
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rawtile | tile containing the image to be compressed |
strip_height | pixel height of the strip we want to compress |
- Returns
- header size
Reimplemented from Compressor.
◆ setQuality()
void JPEGCompressor::setQuality |
( |
int |
factor | ) |
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inline |
Set the compression quality.
- Parameters
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factor | Quality factor (0-100) |
The documentation for this class was generated from the following file: