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Diffstat (limited to 'doc/src/frameworks-technologies/graphicsview.qdoc')
| -rw-r--r-- | doc/src/frameworks-technologies/graphicsview.qdoc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/src/frameworks-technologies/graphicsview.qdoc b/doc/src/frameworks-technologies/graphicsview.qdoc index 8d7ea2c..397cb19 100644 --- a/doc/src/frameworks-technologies/graphicsview.qdoc +++ b/doc/src/frameworks-technologies/graphicsview.qdoc @@ -551,4 +551,24 @@ the widget is transformed resolution independently, allowing the fonts and style to stay crisp when zoomed in. (Note that the effect of resolution independence depends on the style.) + + \section1 Performance + + \section2 Floating Point Instructions + + In order to accurately and quickly apply transformations and effects to + items, Graphics View is built with the assumption that the user's hardware + is able to provide reasonable performance for floating point instructions. + + Many workstations and desktop computers are equipped with suitable hardware + to accelerate this kind of computation, but some embedded devices may only + provide libraries to handle mathematical operations or emulate floating + point instructions in software. + + As a result, certain kinds of effects may be slower than expected on certain + devices. It may be possible to compensate for this performance hit by making + optimizations in other areas; for example, by using \l{#OpenGL Rendering}{OpenGL} + to render a scene. However, any such optimizations may themselves cause a + reduction in performance if they also rely on the presence of floating point + hardware. */ |