Magnum::Platform::EmscriptenApplication::ViewportEvent class

Viewport event.

Constructors, destructors, conversion operators

ViewportEvent(const ViewportEvent&) deleted
Copying is not allowed.
ViewportEvent(ViewportEvent&&) deleted
Moving is not allowed.

Public functions

auto operator=(const ViewportEvent&) -> ViewportEvent& deleted
Copying is not allowed.
auto operator=(ViewportEvent&&) -> ViewportEvent& deleted
Moving is not allowed.
auto windowSize() const -> Vector2i
Canvas size.
auto framebufferSize() const -> Vector2i
Framebuffer size.
auto dpiScaling() const -> Vector2
DPI scaling.
auto devicePixelRatio() const -> Vector2
Device pixel ratio.
auto event() const -> const EmscriptenUiEvent&
Underlying Emscripten event.

Function documentation

Vector2i Magnum::Platform::EmscriptenApplication::ViewportEvent::windowSize() const

Canvas size.

On HiDPI displays, window size can be different from framebufferSize(). See DPI awareness for more information. Note that this method is named "window size" to be API-compatible with Application implementations on other platforms.

Vector2i Magnum::Platform::EmscriptenApplication::ViewportEvent::framebufferSize() const

Framebuffer size.

On HiDPI displays, framebuffer size can be different from windowSize(). See DPI awareness for more information.

Vector2 Magnum::Platform::EmscriptenApplication::ViewportEvent::dpiScaling() const

DPI scaling.

On some platforms moving a browser window between displays can result in DPI scaling value being changed in tandem with a canvas/framebuffer size. Simply resizing the canvas doesn't change the DPI scaling value. See DPI awareness for more information.

Vector2 Magnum::Platform::EmscriptenApplication::ViewportEvent::devicePixelRatio() const

Device pixel ratio.

On some platforms moving a browser window between displays can result in device pixel ratio value being changed. Crossplatform code shouldn't need to query this value because the ratio is already expressed in the ratio of windowSize() and framebufferSize() values. See DPI awareness for more information.