Fawkes API
Fawkes Development Version
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Jpeg image compressor. More...
#include <>>
Public Member Functions | |
JpegImageCompressorLibJpeg (unsigned int quality=80, JpegImageCompressor::JpegColorspace jcs=JpegImageCompressor::JPEG_CS_RGB) | |
Constructor. More... | |
virtual | ~JpegImageCompressorLibJpeg () |
Destructor. More... | |
virtual void | set_image_dimensions (unsigned int width, unsigned int height) |
Set dimensions of image to compress. More... | |
virtual void | set_image_buffer (colorspace_t cspace, unsigned char *buffer) |
Set image buffer to compress. More... | |
virtual void | set_destination_buffer (unsigned char *buf, unsigned int buf_size) |
Set destination buffer (if compressing to memory). More... | |
virtual size_t | compressed_size () |
Get compressed size. More... | |
virtual void | set_filename (const char *filename) |
Set file name. More... | |
virtual void | set_compression_destination (ImageCompressor::CompressionDestination cd) |
Set compression destination. More... | |
virtual bool | supports_compression_destination (ImageCompressor::CompressionDestination cd) |
Check if compressor supports desired compression destination. More... | |
virtual void | compress () |
Compress image. More... | |
virtual size_t | recommended_compressed_buffer_size () |
Get the recommended size for the compressed buffer. More... | |
virtual bool | supports_vflip () |
Check if image compressor can do vflip during compress. More... | |
virtual void | set_vflip (bool enable) |
Enable or disable vflipping. More... | |
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virtual | ~ImageCompressor () |
Virtual empty destructor. More... | |
Additional Inherited Members | |
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enum | CompressionDestination { COMP_DEST_FILE, COMP_DEST_MEM } |
Where to put the compressed image. More... | |
Jpeg image compressor.
Definition at line 38 of file jpeg_compressor_libjpeg.h.
firevision::JpegImageCompressorLibJpeg::JpegImageCompressorLibJpeg | ( | unsigned int | quality = 80 , |
JpegImageCompressor::JpegColorspace | jcs = JpegImageCompressor::JPEG_CS_RGB |
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Constructor.
quality | JPEG quality in percent |
jcs | Jpeg colorspace |
Definition at line 207 of file jpeg_compressor_libjpeg.cpp.
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Destructor.
Definition at line 215 of file jpeg_compressor_libjpeg.cpp.
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Compress image.
Implements firevision::ImageCompressor.
Definition at line 233 of file jpeg_compressor_libjpeg.cpp.
References firevision::JpegImageCompressor::JPEG_CS_RGB.
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Get compressed size.
Implements firevision::ImageCompressor.
Definition at line 392 of file jpeg_compressor_libjpeg.cpp.
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Get the recommended size for the compressed buffer.
It is not guaranteed that this size is really enough for compression but in most cases this should be suitable.
Implements firevision::ImageCompressor.
Definition at line 398 of file jpeg_compressor_libjpeg.cpp.
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Set compression destination.
cd | compression destination |
Implements firevision::ImageCompressor.
Definition at line 370 of file jpeg_compressor_libjpeg.cpp.
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Set destination buffer (if compressing to memory).
buf | buffer |
buf_size | buffer size |
Implements firevision::ImageCompressor.
Definition at line 384 of file jpeg_compressor_libjpeg.cpp.
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Set file name.
filename | file name (if compressing to file) |
Implements firevision::ImageCompressor.
Definition at line 405 of file jpeg_compressor_libjpeg.cpp.
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Set image buffer to compress.
cspace | colorspace of image |
buffer | buffer that contains the image |
Implements firevision::ImageCompressor.
Definition at line 361 of file jpeg_compressor_libjpeg.cpp.
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Set dimensions of image to compress.
width | width of image in pixels |
height | height of image in pixels |
Implements firevision::ImageCompressor.
Definition at line 353 of file jpeg_compressor_libjpeg.cpp.
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Enable or disable vflipping.
This shall throw an exception if vflipping is not supported.
enable | true to enable vflipping, false to disable |
Exception | thrown if vflipping is not supported. |
Implements firevision::ImageCompressor.
Definition at line 227 of file jpeg_compressor_libjpeg.cpp.
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Check if compressor supports desired compression destination.
cd | compression destination |
Implements firevision::ImageCompressor.
Definition at line 377 of file jpeg_compressor_libjpeg.cpp.
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Check if image compressor can do vflip during compress.
Vertical flipping (having the image upside down) is an operation necessary for example for cameras hanging upside down. During compression when the buffer is typically copied or converted line-wise anyway, this is a particularly cheap operation. Therfore we provide an API to implement this.
Implements firevision::ImageCompressor.
Definition at line 221 of file jpeg_compressor_libjpeg.cpp.