diff options
| -rw-r--r-- | src/quick/items/qquickcanvas.cpp | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/quick/items/qquickcanvas.cpp b/src/quick/items/qquickcanvas.cpp index b538dba99a..248195127f 100644 --- a/src/quick/items/qquickcanvas.cpp +++ b/src/quick/items/qquickcanvas.cpp @@ -2355,10 +2355,21 @@ bool QQuickCanvas::clearBeforeRendering() const The caller of the function is responsible for deleting the returned texture. The actual GL texture will be deleted when the texture object is deleted. + Depending on the underlying implementation of the scene graph, the returned + texture may be part of an atlas. For code to be portable across implementations + one should always use the texture coordinates returned from + QSGTexture::normalizedTextureSubRect() when building geometry. + \warning This function will return 0 if the scene graph has not yet been initialized. - This function can be called both from the GUI thread and the rendering thread. + \warning The returned texture is not memory managed by the scene graph and + must be explicitely deleted by the caller on the rendering thread. + This is acheived by deleting the texture from a QSGNode destructor + or by using deleteLater() in the case where the texture already has affinity + to the rendering thread. + + This function can be called from any thread. \sa sceneGraphInitialized() */ |