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Rogue Wave Views Foundation Package API Reference Guide |
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Rogue Wave Views Foundation Package API Reference Guide |
Rogue Wave Views Documentation Home |
Bitmap streamer class. More...
#include <ilviews/bitmaps/jpg.h>
Public Member Functions | |
| IlvJPGStreamer () | |
| Constructor. | |
| IlBoolean | canRead () const |
| Indicates that the instance can read from a stream. More... | |
| IlBoolean | canWrite () const |
| Indicates that the instance can write to a stream. More... | |
| IlBoolean | checkSignature (const IlUChar *data, IlUInt size) |
| Checks the signature of the input stream. More... | |
| IlUInt | getQuality () const |
| Gets the quality of the generated JPEG stream when writing. More... | |
| IlBoolean | isProgressive () const |
| Gets whether the generated JPEG stream is progressive. More... | |
| IlvBitmapData * | read (ILVSTDPREF istream &stream) |
| Reads a JPEG image from a stream. More... | |
| void | setProgressive (IlBoolean progressive) |
| Sets whether the generated JPEG stream is progressive. More... | |
| void | setQuality (IlUInt quality) |
| Sets the quality of the generated JPEG stream. More... | |
| IlBoolean | write (IlvBitmapData *data, ILVSTDPREF ostream &stream) |
Writes an IlvBitmapDatato a JPEG stream. More... | |
 Public Member Functions inherited from IlvBitmapStreamer | |
| virtual void | callReadProgressCallback (IlUInt current, IlUInt max) |
| Calls the callback for read progression. More... | |
| virtual void | callWriteProgressCallback (IlUInt current, IlUInt max) |
| Calls the callback for write progression. More... | |
| virtual const char * | getName () const |
| Returns the internal name of the streamer. More... | |
| IlvQuantizer * | getQuantizer () const |
| Returns the quantizer used by this streamer. More... | |
| virtual IlvBitmapData * | read (std::istream &stream) |
| Reads from a stream. More... | |
| virtual IlvBitmapInformation * | readInfo (std::istream &stream) |
| Reads information from a stream. More... | |
| void | setQuantizer (IlvQuantizer *quantizer) |
| Sets the quantizer used (if needed) by this streamer. More... | |
| virtual void | setReadProgressCallback (IlvProgressCallback rpCallback, IlAny arg=0) |
| Sets the callback for read progression. More... | |
| virtual void | setWriteProgressCallback (IlvProgressCallback wpCallback, IlAny arg=0) |
| Sets the callback for write progression. More... | |
| virtual IlBoolean | write (IlvBitmapData *bitmapData, std::ostream &stream) |
Writes an IlvBitmapData to a stream. More... | |
| Public Member Functions inherited from IlvValueInterface | |
| virtual IlBoolean | applyValue (const IlvValue &value) |
| Apply an accessor. More... | |
| virtual IlBoolean | changeValue (const IlvValue &val) |
| Changes the value of an accessor. More... | |
| virtual IlBoolean | changeValues (const IlvValue *values, IlUShort count=0) |
| Changes several accessor values simultaneously. More... | |
| virtual void | getAccessors (const IlSymbol *const **names, const IlvValueTypeClass *const **types, IlUInt &count) const |
| Retrieves the list of available accessors of an object. More... | |
| virtual IlvValue & | queryValue (IlvValue &val) const |
| Retrieves an accessor value. More... | |
| virtual void | queryValues (IlvValue *values, IlUShort count) const |
| Retrieves multiple accessor values simultaneously. More... | |
Additional Inherited Members | |
| Static Public Member Functions inherited from IlvBitmapStreamer | |
| static IlvBitmapStreamer * | Get (const char *name) |
| Returns a streamer from its name. More... | |
| static IlvBitmapStreamer ** | GetRegisteredStreamers (IlUInt &count) |
| Returns the registered streamers. More... | |
| static IlvBitmap * | Read (IlvDisplay *display, std::istream &stream, const IlUChar *signature, IlUInt signatureLen) |
| Reads a bitmap using the registered streamers. More... | |
| static IlvBitmapData * | ReadBitmapData (std::istream &stream, const IlUChar *signature, IlUInt signatureLen) |
| Reads bitmap data using the registered streamers. More... | |
| static IlvBitmapInformation * | ReadInfo (std::istream &stream, const IlUChar *signature, IlUInt signatureLen) |
| Reads bitmap information using the registered streamers. More... | |
| static void | Register (IlvBitmapStreamer *streamer) |
| Registers the given streamer. More... | |
| static IlBoolean | UnRegister (IlvBitmapStreamer *streamer) |
| Unregisters the given streamer. More... | |
Bitmap streamer class.
Library: xviews or winviews or mviews (mutually exclusive)
This streamer provides methods to deal with a stream containing a JPEG image. It supports reading from grayscale or true color and progressive and non-progressive JPEG streams.
This streamer can read and write.
When reading or writing, callbacks will be called at each scanline.
|
virtual |
Indicates that the instance can read from a stream.
IlTrue. Reimplemented from IlvBitmapStreamer.
|
virtual |
Indicates that the instance can write to a stream.
IlTrue. Reimplemented from IlvBitmapStreamer.
Checks the signature of the input stream.
| data | The data containing the signature of the stream. |
| size | The size of the data containing the signature. |
IlTrue if the data contains a JPEG signature. Implements IlvBitmapStreamer.
| IlUInt IlvJPGStreamer::getQuality | ( | ) | const |
Gets the quality of the generated JPEG stream when writing.
| IlBoolean IlvJPGStreamer::isProgressive | ( | ) | const |
Gets whether the generated JPEG stream is progressive.
IlTrue if the generated JPEG stream is progressive. | IlvBitmapData* IlvJPGStreamer::read | ( | ILVSTDPREF istream & | stream | ) |
Reads a JPEG image from a stream.
| stream | The stream to read from. |
IlvBitmapData. | void IlvJPGStreamer::setProgressive | ( | IlBoolean | progressive | ) |
Sets whether the generated JPEG stream is progressive.
| progressive | IlTrue if the stream is progressive. |
| void IlvJPGStreamer::setQuality | ( | IlUInt | quality | ) |
Sets the quality of the generated JPEG stream.
This method sets the quality of the JPEG stream when writing. Useful values range from 10 (very low quality) to 100 (maximum quality).
| quality | The quality of the JPEG stream. |
| IlBoolean IlvJPGStreamer::write | ( | IlvBitmapData * | data, |
| ILVSTDPREF ostream & | stream | ||
| ) |
Writes an IlvBitmapDatato a JPEG stream.
| data | The bitmap data to write. |
| stream | The stream to write to. |
IlTrue if the bitmap data has been written. © Copyright 2016, Rogue Wave Software, Inc. All Rights Reserved.
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