The purpose of the texture factory is to provide a placeholder for a image data that can be converted into an OpenGL texture.
Creating a texture directly is not possible as there is rarely an OpenGL context available in the thread that is responsible for loading the image data.
Constructs a texture factory. Since
QQuickTextureFactoryis abstract, it cannot be instantiated directly.
This function is called on the scene graph rendering thread to create a
QSGTextureinstance from the factory.
windowprovides the context which this texture is created in.
QML will internally cache the returned texture as needed. Each call to this function should return a unique instance.
The OpenGL context used for rendering is bound when this function is called.
- Return type
Returns an image version of this texture.
The lifespan of the returned image is unknown, so the implementation should return a self contained
QImage, not make use of the
QImage(uchar *, …) constructor.
This function is not commonly used and is expected to be slow.
- Return type
Returns the number of bytes of memory the texture consumes.
QQuickTextureFactoryholding the given
This is typically used as a helper in
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