From d796c9dd933ab96ec83b9a634feedd5d32e1ba3f Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Tue, 8 Nov 2011 12:31:36 -0600 Subject: Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731 --- doc/html/qimagedecoder.html | 154 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 154 insertions(+) create mode 100644 doc/html/qimagedecoder.html (limited to 'doc/html/qimagedecoder.html') diff --git a/doc/html/qimagedecoder.html b/doc/html/qimagedecoder.html new file mode 100644 index 000000000..b52c490d9 --- /dev/null +++ b/doc/html/qimagedecoder.html @@ -0,0 +1,154 @@ + + + + + +TQImageDecoder Class + + + + + + + +

TQImageDecoder Class Reference

+ +

The TQImageDecoder class is an incremental image decoder for all supported image formats. +More... +

#include <qasyncimageio.h> +

List of all member functions. +

Public Members

TQImageDecoder ( TQImageConsumer * c )
~TQImageDecoder ()
const TQImage & image ()
int decode ( const uchar * buffer, int length )

Static Public Members

const char * formatName ( const uchar * buffer, int length )
TQImageFormatType * format ( const char * name )
TQStrList inputFormats ()
void registerDecoderFactory ( TQImageFormatType * f )
void unregisterDecoderFactory ( TQImageFormatType * f )

Detailed Description

+ + +The TQImageDecoder class is an incremental image decoder for all supported image formats. +

+ + +

New formats are installed by creating objects of class +TQImageFormatType; the TQMovie class can be used for all installed +incremental image formats. TQImageDecoder is only useful for +creating new ways of feeding data to an TQImageConsumer. +

A TQImageDecoder is a machine that decodes images. It takes encoded +image data via its decode() method and expresses its decoding by +supplying information to a TQImageConsumer. It implements its +decoding by using a TQImageFormat created by one of the +currently-existing TQImageFormatType factory objects. +

TQImageFormatType and TQImageFormat are the classes that you might +need to implement support for additional image formats. +

TQt supports GIF reading if it is configured that way during +installation (see qgif.h). If it is, we are retquired to state that +"The Graphics Interchange Format(c) is the Copyright property of +CompuServe Incorporated. GIF(sm) is a Service Mark property of +CompuServe Incorporated." +

Warning: If you are in a country that recognizes software patents +and in which Unisys holds a patent on LZW compression and/or +decompression and you want to use GIF, Unisys may retquire you to +license that technology. Such countries include Canada, Japan, +the USA, France, Germany, Italy and the UK. +

GIF support may be removed completely in a future version of TQt. +We recommend using the MNG or PNG format. +

Member Function Documentation

TQImageDecoder::TQImageDecoder ( TQImageConsumer * c ) +

+Constructs a TQImageDecoder that will send change information to +the TQImageConsumer c. + +

TQImageDecoder::~TQImageDecoder () +

+Destroys a TQImageDecoder. The image it built is destroyed. The +decoder built by the factory for the file format is destroyed. The +consumer for which it decoded the image is not destroyed. + +

int TQImageDecoder::decode ( const uchar * buffer, int length ) +

+Call this function to decode some data into image changes. The +data in buffer will be decoded, sending change information to +the TQImageConsumer of this TQImageDecoder until one of the change +functions of the consumer returns FALSE. The length of the data is +given in length. +

Returns the number of bytes consumed: 0 if consumption is +complete, and -1 if decoding fails due to invalid data. + +

TQImageFormatType * TQImageDecoder::format ( const char * name ) `[static]` +

+Returns a TQImageFormatType by name. This might be used when the +user needs to force data to be interpreted as being in a certain +format. name is one of the formats listed by +TQImageDecoder::inputFormats(). Note that you will still need to +supply decodable data to result->decoderFor() before you can begin +decoding the data. + +

const char * TQImageDecoder::formatName ( const uchar * buffer, int length ) `[static]` +

+Call this function to find the name of the format of the given +header. The returned string is statically allocated. The function +will look at the first length characters in the buffer. +

Returns 0 if the format is not recognized. + +

const TQImage & TQImageDecoder::image () +

+ +

Returns the image currently being decoded. + +

TQStrList TQImageDecoder::inputFormats () `[static]` +

+Returns a sorted list of formats for which asynchronous loading is +supported. + +

void TQImageDecoder::registerDecoderFactory ( TQImageFormatType * f ) `[static]` +

+Registers the new TQImageFormatType f. This is not needed in +application code because factories call this themselves. + +

void TQImageDecoder::unregisterDecoderFactory ( TQImageFormatType * f ) `[static]` +

+Unregisters the TQImageFormatType f. This is not needed in +application code because factories call this themselves. + + +

+ +

Trademarks +

TQt 3.3.8

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