diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/examples/overpainting.qdoc | 7 | ||||
| -rw-r--r-- | doc/src/frameworks-technologies/graphicsview.qdoc | 20 | ||||
| -rw-r--r-- | doc/src/images/graphicseffect-blur.png | bin | 0 -> 41433 bytes | |||
| -rw-r--r-- | doc/src/images/graphicseffect-colorize.png | bin | 0 -> 35062 bytes | |||
| -rw-r--r-- | doc/src/images/graphicseffect-drop-shadow.png | bin | 0 -> 38770 bytes | |||
| -rw-r--r-- | doc/src/images/graphicseffect-effects.png | bin | 0 -> 112462 bytes | |||
| -rw-r--r-- | doc/src/images/graphicseffect-grayscale.png | bin | 0 -> 35056 bytes | |||
| -rw-r--r-- | doc/src/images/graphicseffect-opacity.png | bin | 0 -> 33879 bytes | |||
| -rw-r--r-- | doc/src/images/graphicseffect-pixelize.png | bin | 0 -> 23577 bytes | |||
| -rw-r--r-- | doc/src/images/graphicseffect-widget.png | bin | 0 -> 16693 bytes | |||
| -rw-r--r-- | doc/src/snippets/code/src_corelib_kernel_qobject.cpp | 6 |
11 files changed, 27 insertions, 6 deletions
diff --git a/doc/src/examples/overpainting.qdoc b/doc/src/examples/overpainting.qdoc index 91100c0..b19b503 100644 --- a/doc/src/examples/overpainting.qdoc +++ b/doc/src/examples/overpainting.qdoc @@ -159,9 +159,10 @@ \snippet examples/opengl/overpainting/glwidget.cpp 7 - Once the list containing the object has been executed, the matrix stack - needs to be restored to its original state at the start of this function - before we can begin overpainting: + Once the list containing the object has been executed, the GL + states we changed and the matrix stack needs to be restored to its + original state at the start of this function before we can begin + overpainting: \snippet examples/opengl/overpainting/glwidget.cpp 8 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. */ diff --git a/doc/src/images/graphicseffect-blur.png b/doc/src/images/graphicseffect-blur.png Binary files differnew file mode 100644 index 0000000..3fa403b --- /dev/null +++ b/doc/src/images/graphicseffect-blur.png diff --git a/doc/src/images/graphicseffect-colorize.png b/doc/src/images/graphicseffect-colorize.png Binary files differnew file mode 100644 index 0000000..96fbfe4 --- /dev/null +++ b/doc/src/images/graphicseffect-colorize.png diff --git a/doc/src/images/graphicseffect-drop-shadow.png b/doc/src/images/graphicseffect-drop-shadow.png Binary files differnew file mode 100644 index 0000000..c02415a --- /dev/null +++ b/doc/src/images/graphicseffect-drop-shadow.png diff --git a/doc/src/images/graphicseffect-effects.png b/doc/src/images/graphicseffect-effects.png Binary files differnew file mode 100644 index 0000000..422ae19 --- /dev/null +++ b/doc/src/images/graphicseffect-effects.png diff --git a/doc/src/images/graphicseffect-grayscale.png b/doc/src/images/graphicseffect-grayscale.png Binary files differnew file mode 100644 index 0000000..2bd0c93 --- /dev/null +++ b/doc/src/images/graphicseffect-grayscale.png diff --git a/doc/src/images/graphicseffect-opacity.png b/doc/src/images/graphicseffect-opacity.png Binary files differnew file mode 100644 index 0000000..de15859 --- /dev/null +++ b/doc/src/images/graphicseffect-opacity.png diff --git a/doc/src/images/graphicseffect-pixelize.png b/doc/src/images/graphicseffect-pixelize.png Binary files differnew file mode 100644 index 0000000..047c452 --- /dev/null +++ b/doc/src/images/graphicseffect-pixelize.png diff --git a/doc/src/images/graphicseffect-widget.png b/doc/src/images/graphicseffect-widget.png Binary files differnew file mode 100644 index 0000000..27245d1 --- /dev/null +++ b/doc/src/images/graphicseffect-widget.png diff --git a/doc/src/snippets/code/src_corelib_kernel_qobject.cpp b/doc/src/snippets/code/src_corelib_kernel_qobject.cpp index 5c0f80c..a02d4e9 100644 --- a/doc/src/snippets/code/src_corelib_kernel_qobject.cpp +++ b/doc/src/snippets/code/src_corelib_kernel_qobject.cpp @@ -39,10 +39,10 @@ timer->inherits("QTimer"); // returns true timer->inherits("QObject"); // returns true timer->inherits("QAbstractButton"); // returns false -// QLayout inherits QObject and QLayoutItem -QLayout *layout = new QLayout; +// QVBoxLayout inherits QObject and QLayoutItem +QVBoxLayout *layout = new QVBoxLayout; layout->inherits("QObject"); // returns true -layout->inherits("QLayoutItem"); // returns false +layout->inherits("QLayoutItem"); // returns true (even though QLayoutItem is not a QObject) //! [4] |
