Using QImage as Texture in Qt3D

Dabulla

Hi,

I was searching for a solution to load custom pixels from C++ into Qt3D as a Texture.

Approaches:

I have a working QQuickImageProvider with URLs like "image://myImageProvider/someId" working. When I give these Urls to a Qt3D TextureImage I get an error "QTextureImage only supports local url".
I tried using Scene2D and load an oldfashioned Image-Item. This does work, but I run into an error when using Scene2D in a NodeInstantiator (maybe this bug: https://bugreports.qt.io/browse/QTBUG-67635)
Currently I am implementing a Qt3DRender::QTextureGenerator and Qt3DRender::QAbstractTexture. Now I think I need to use Qt private Headers to access Qt3DRender::QAbstractTexturePrivate and it's "setDataFunctor"-Method.

Before contiuing this (quite painful) path, I wanted to ask for simpler solutions I might overlooked. Any ideas?

Thanks in advance

Dabulla

I've got a workaround to get approach 2) working.

A solution is, to use a repeater inside one single Scene2D in addition to the NodeInstantiator.
I then render all needed images using an image-providers.
NodeInstantiator uses the Scene2D as a "TextureAtlas" and cutts out the repeated images as needed.

Andreas E.

I use Qt3DRender::QPaintedTextureImage to paint QImage objects onto Qt3DRender::QTexture2D from C++. But I don't know if you can access that on QML level in a convenient way.

Alexiss

@Andreas-E could you please give us a short C++ example of how you implement your idea with QTexture2D and QPaintedTextureImage in the same time ? Could help me a lot !

amzounslideslide

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