how to use loadFromData in painter

[sar_van81]

hi everyone,

i have a RGB values in an character array. can anyone say me to use loadFromData function in QPixmap inorder to convert the RGB datas to a pixmap...?
i did as follows:

void paintEvent(QPaintEvent *)
{
unsigned char buffer[20]={0,0,0,0,0,255,255,255,255,255,0,0,0,0,0};
QPixmap pixmap;
if(pixmap.loadFromData(buffer,20,0,QPixmap::Auto);
QPainter p(this);
p.drawPIxmap(0,0,pixmap,0,0,-1,-1);
}

void paintEvent(QPaintEvent *)
{
unsigned char buffer[20]={0,0,0,0,0,255,255,255,255,255,0,0,0,0,0};
QPixmap pixmap;
if(pixmap.loadFromData(buffer,20,0,QPixmap::Auto);
QPainter p(this);
p.drawPIxmap(0,0,pixmap,0,0,-1,-1);
}

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. the code gets compiled without error. but nothing is coming on the screen.can anyone provide suggestions for this...?
are these steps correct...? if no can any correct me...?

thanks in advance,

saravanan