QImage to QByteArray

Hi,
Is there any method to convert QImage to QByteArray???

Thank You

this example was taken from assistant

Code:

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QImage image;
QByteArray ba;
QBuffer buffer(&ba);
buffer.open(QIODevice::WriteOnly);
image.save(&buffer, "PNG"); // writes image into ba in PNG format

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Thank You..
Is there any fuction to convert QImage to uchar* . Actually i used bits(), scanline() etc. Since it returns address, i cannot manipulate the data.
Actually i need to copress the QImage row data using qCompress(). Can anyone help me out???

you can use this function

Code:

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QByteArray qCompress ( const QByteArray & data, int compressionLevel = -1 )

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Code:

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QByteArray compressed = qCompress(QByteArray((char*)image.bits(), image.numBytes()));

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or

Code:

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QByteArray compressed = qCompress(image.bits(), image.numBytes());

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i have notice to compress QByteArray is faster & smal -> http://liblzf.plan9.de/
i found this tip on KDE source...

Code:

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// Lossless compression using LZF algorithm, this is faster on modern CPU than
// the original implementation in http://liblzf.plan9.de/
// compression data on cache to not fill to match ram buffer
 
/* search on kde source  :  *xml  */
static int lzff_compress(const void* input, int length, void* output, int maxout)
static int lzff_decompress(const void* input, int length, void* output, int maxout)

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