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QPNGImagePacker Class Reference

The QPNGImagePacker class creates well-compressed PNG animations. More...

#include <qpngio.h>

List of all member functions.

Public Members


Detailed Description

The QPNGImagePacker class creates well-compressed PNG animations.

By using transparency, QPNGImagePacker allows you to build a PNG image from a sequence of QImages.


Member Function Documentation

QPNGImagePacker::QPNGImagePacker ( QIODevice * iod, int storage_depth, int conversionflags )

Creates an image packer that writes PNG data to iod using a storage_depth bit encoding (use 8 or 32, depending on the desired quality and compression requirements).

bool QPNGImagePacker::packImage ( const QImage & img )

Adds the image img to the PNG animation, analyzing the differences between this and the previous image to improve compression.

void QPNGImagePacker::setPixelAlignment ( int x )

Aligns pixel differences to x pixels. For example, using 8 can improve playback on certain hardware. Normally the default of 1-pixel alignment (i.e., no alignment) gives better compression and performance.

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Qt version 3.0.0-beta1-beta1