QImageFormat(3qt)

📦 version 3.3.8b, in fedora 43, fedora 44

💖 QImageFormat 💖 (that's the QImageFormat(3qt) girlies, hey bestie!)

okay so bestie, pull up a chair, grab your boba 🧋, because we're about to talk about the QImageFormat class — an incremental image decoder for ONE specific image format. that's it. that's her whole job. she's a specialist, not a generalist, and honestly? slay. 💅

✨ NAME ✨

QImageFormat — an incremental image decoder for a specific image format 🦋

🌸 SYNOPSIS 🌸

#include <qasyncimageio.h>

👑 Public Members

virtual int decode ( QImage & img, QImageConsumer * consumer, const
    uchar * buffer, int length ) = 0

🎀 DESCRIPTION 🎀

okay so real talk. the QImageFormat class is an incremental image decoder for one specific image format. no cap. one format, one girlie, doing her thing. 💖

here's the vibe: if you make a derived class of QImageFormatType, and that thing in turn creates objects that are a subclass of QImageFormat, then boom — you just added support for more incremental image formats. and why do we care? because that lets those formats be sources for a QMovie, or lets the first frame of the image stream get loaded as a QImage or a QPixmap. it's giving ✨possibility✨ honestly. 🌈

your new subclass must reimplement the decode() function to process your new format. no skipping, bestie, it's mandatory, it's the whole assignment. 📝

and where do these new QImageFormat objects come from, you ask? they're generated by new QImageFormatType factories. factories, bestie. industrial. iconic. 🏭

lowkey also check out Graphics Classes, Image Processing Classes, and Multimedia Classes — they're the friend group, iykyk. 🫶

🦋 MEMBER FUNCTION DOCUMENTATION 🦋

int QImageFormat::decode ( QImage & img, QImageConsumer * consumer, const uchar * buffer, int length ) [pure virtual]

okay so listen up because this one is THE main character. 🌟 new subclasses must reimplement this method. periodt.

what she does: she should decode some (or all!) of the bytes from buffer into img, and as the decoding proceeds she calls the methods of consumer to let that consumer know about changes to the image. the length of the data? that's given in length. simple. 💅

and here's a lil plot twist — the consumer may be 0, in which case the function should just process the data into img without telling any consumer about the changes. she's like "no audience today? still gonna perform." 🎭

😭 not the incremental part being the whole point: the decoder must store enough state to be able to continue in subsequent calls to this method — that's literally the essence of the incremental image loading. if you forget the state, bestie, it's over, it's giving memory loss. 💀

another thing: the function should return without processing all the data if it reaches the end of a frame in the input. so like, know when to stop. boundaries. 🛑

and finally, the function must return the number of bytes it has processed. yes, she reports back. she's communicative. we love that for her. ✨

🌈 SEE ALSO 🌈

Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the license file included in the distribution for a complete license statement.

🧚 AUTHOR 🧚

Generated automatically from the source code. (yes bestie, she was born from the machine itself. no human author. mysterious. ethereal. 🦋)

🙈 BUGS 🙈

found a bug in Qt? 😭 please report it as described in http://doc.trolltech.com/bughowto.html. good bug reports help us help you. thank you!! (fr fr, they mean it.) 🫶

the definitive Qt documentation is provided in HTML format — it lives at $QTDIR/doc/html and you can read it using Qt Assistant or with a web browser. this man page? it's provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech. so like, enjoy it, but know it's the vibes-only version. 💅

if you find errors in this manual page, please report them to qt-bugs@trolltech.com. and PLEASE include the name of the manual page (qimageformat.3qt) and the Qt version (3.3.8). don't make them guess, bestie, that's rude. 🎀

💖 okay that's the whole page!! sending you off with love from Trolltech AS, dated 2 February 2007 — yeah she's an elder, she's vintage, she's a classic QImageFormat(3qt) era girlie, and honestly? she ate. ✨👑 bye bestie!! 🦋💅
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