Struct qt_widgets::q_opengl_widget::UpdateBehavior

#[repr(transparent)]
pub struct UpdateBehavior(_);

This enum describes the update semantics of QOpenGLWidget.

C++ enum: QOpenGLWidget::UpdateBehavior.

C++ documentation:

This enum describes the update semantics of QOpenGLWidget.

This enum was introduced or modified in Qt 5.5.

See also updateBehavior() and setUpdateBehavior().

Methods

impl UpdateBehavior

pub fn to_int(&self) -> c_int

impl UpdateBehavior

pub const NoPartialUpdate: UpdateBehavior

QOpenGLWidget will discard the contents of the color buffer and the ancillary buffers after the QOpenGLWidget is rendered to screen. This is the same behavior that can be expected by calling QOpenGLContext::swapBuffers with a default opengl enabled QWindow as the argument. NoPartialUpdate can have some performance benefits on certain hardware architectures common in the mobile and embedded space when a framebuffer object is used as the rendering target. The framebuffer object is invalidated between frames with glDiscardFramebufferEXT if supported or a glClear. Please see the documentation of EXT_discard_framebuffer for more information: https://www.khronos.org/registry/gles/extensions/EXT/EXT_discard_framebuffer.txt (C++ enum variant: NoPartialUpdate = 0)

pub const PartialUpdate: UpdateBehavior

The framebuffer objects color buffer and ancillary buffers are not invalidated between frames. (C++ enum variant: PartialUpdate = 1)

Trait Implementations

impl Eq for UpdateBehavior

impl Clone for UpdateBehavior

fn clone(&self) -> UpdateBehavior

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl PartialEq<UpdateBehavior> for UpdateBehavior

fn eq(&self, other: &UpdateBehavior) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &UpdateBehavior) -> bool

This method tests for !=.

impl From<i32> for UpdateBehavior

fn from(value: c_int) -> Self

Performs the conversion.

impl From<UpdateBehavior> for c_int

fn from(value: UpdateBehavior) -> Self

Performs the conversion.

impl Copy for UpdateBehavior

impl Debug for UpdateBehavior

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.