Building a QPixmap using a PNG in RAM

**Luc4** · 9th February 2010, 06:28

Hi! If I have a pointer to a PNG image in RAM (and assuming I know the size of the image), would it be possible to create a QPixmap without having to write the PNG to the HD and then creating it again?
Thanks!

**aamer4yu** · 9th February 2010, 07:03

QPixmap::loadFromData

**ecanela** · 9th February 2010, 07:09

you have the PNG image in RAM. but how is created?

if you have the image in a QByteArray you can use QPixmap::loadFromData().

Qt Code:

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QPixmap pixmap;
bool isLoaded = pixmap.loadFromData ( byteArray, "PNG", Qt::AutoColor  );
 
if ( !isLoaded )
  // error

QPixmap pixmap;
bool isLoaded = pixmap.loadFromData ( byteArray, "PNG", Qt::AutoColor  );

if ( !isLoaded )
  // error

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The loader attempts to read the pixmap using the specified format. If the format is not specified (which is the default), the loader probes the file for a header to guess the file format.