This is another trivial bitmap compressor. More...
#include <SlsBitmapCompressor.hxx>
Public Member Functions | |
| virtual | ~CompressionByDeletion () |
| virtual std::shared_ptr< BitmapReplacement > | Compress (const BitmapEx &rBitmap) const override |
| Compress the given bitmap into a replacement format that is specific to the compressor class. More... | |
| virtual BitmapEx | Decompress (const BitmapReplacement &rBitmapData) const override |
| Decompress the given replacement data into a preview bitmap. More... | |
| virtual bool | IsLossless () const override |
| Return whether the compression and decompression is lossless. More... | |
| virtual std::shared_ptr< BitmapReplacement > | Compress (const BitmapEx &rBitmap) const =0 |
| Compress the given bitmap into a replacement format that is specific to the compressor class. More... | |
| virtual BitmapEx | Decompress (const BitmapReplacement &rBitmapData) const =0 |
| Decompress the given replacement data into a preview bitmap. More... | |
| virtual bool | IsLossless () const =0 |
| Return whether the compression and decompression is lossless. More... | |
Additional Inherited Members | |
 Protected Member Functions inherited from sd::slidesorter::cache::BitmapCompressor | |
| ~BitmapCompressor () | |
Detailed Description
This is another trivial bitmap compressor.
Instead of compressing a bitmap, it throws the bitmap away. Its Decompress() method returns a NULL pointer. The caller has to create a new preview bitmap instead. This compressor clearly is not lossless.
Definition at line 94 of file SlsBitmapCompressor.hxx.
Constructor & Destructor Documentation
◆ ~CompressionByDeletion()
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inlinevirtual |
Definition at line 97 of file SlsBitmapCompressor.hxx.
Member Function Documentation
◆ Compress()
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overridevirtual |
Compress the given bitmap into a replacement format that is specific to the compressor class.
Implements sd::slidesorter::cache::BitmapCompressor.
Definition at line 62 of file SlsBitmapCompressor.cxx.
◆ Decompress()
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overridevirtual |
Decompress the given replacement data into a preview bitmap.
Depending on the compression technique the returned bitmap may differ from the original bitmap given to the Compress() method. It may even of the wrong size or empty or the NULL pointer. It is the task of the caller to create a new preview bitmap if the returned one is not as desired.
Implements sd::slidesorter::cache::BitmapCompressor.
Definition at line 67 of file SlsBitmapCompressor.cxx.
◆ IsLossless()
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overridevirtual |
Return whether the compression and decompression is lossless.
This value is used by the caller of Decompress() to decide whether to use the returned bitmap as is or if a new preview has to be created.
Implements sd::slidesorter::cache::BitmapCompressor.
Definition at line 74 of file SlsBitmapCompressor.cxx.
The documentation for this class was generated from the following files:
