Transparent QImage on QSGTexture

SourabhKus

I am using Qt5.8 on Windows. I have created a QQucikItem which i am rendering on QML. In updatePaintNode function i am creating a QImage(which have some transparent part) as finalImage.

QSGSimpleTextureNode *node = 0;
QSGTexture *texture;        
node = static_cast<QSGSimpleTextureNode *>(oldNode);
if (!node) {
    node = new QSGSimpleTextureNode();
}

texture = window()->createTextureFromImage(finalImage);
node->setTexture(texture);
node->setRect(boundingRect());
node->markDirty(QSGNode::DirtyForceUpdate);
return node;

so in qml transparent part is becoming black instead of transparent.

SGaist

Hi and welcome to devnet,

Can you provide a minimal compilable example that shows the error ?

SourabhKus

I found there was bug in creation of QImage i was using RGB32 instead of ARGB32