diff options
Diffstat (limited to 'src/quick/scenegraph/coreapi/qsgtexture.cpp')
| -rw-r--r-- | src/quick/scenegraph/coreapi/qsgtexture.cpp | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/src/quick/scenegraph/coreapi/qsgtexture.cpp b/src/quick/scenegraph/coreapi/qsgtexture.cpp index 2cf60f317e..65a43785aa 100644 --- a/src/quick/scenegraph/coreapi/qsgtexture.cpp +++ b/src/quick/scenegraph/coreapi/qsgtexture.cpp @@ -489,21 +489,19 @@ bool QSGTexture::isAtlasTexture() const */ /*! - \fn int QSGTexture::comparisonKey() const + \fn qint64 QSGTexture::comparisonKey() const Returns a key suitable for comparing textures. Typically used in QSGMaterial::compare() implementations. Just comparing QSGTexture pointers is not always sufficient because two QSGTexture instances that refer to the same native texture object - underneath should also be considered equal. Hence this function. - - \note Unlike textureId(), implementations of this function are not expected - to and should not create any graphics resources (so texture objects) in - case there is none yet. + underneath should also be considered equal. Hence the need for this function. + Implementations of this function are not expected to, and should not create + any graphics resources (native texture objects) in case there are none yet. A QSGTexture that does not have a native texture object underneath is - typically not equal to any other QSGTexture. There are exceptions to this, + typically \b not equal to any other QSGTexture. There are exceptions to this, in particular when atlasing is used (where multiple textures share the same atlas texture under the hood), that is then up to the subclass implementations to deal with as appropriate. |