Skip to main content

WindowedDrawTarget

embedded_gui::render

Trait WindowedDrawTarget 

Source 
pub trait WindowedDrawTarget: DrawTarget {
    // Required method
    fn set_window(&mut self, area: &Rectangle) -> Result<(), Self::Error>;
}
Expand description

Capability trait for hardware display controllers (e.g. ST7789, ILI9341, SSD1306) supporting direct column/row address window setting (set_address_window). Allows rendering dirty regions by transmitting SPI/DMA transfers exclusively to the target sub-window instead of the full screen.

Re-exported from embedded_draw_target. Partial-present capability for a DrawTarget.

Display controllers with a column/row address window (SSD1357, ST7789, ILI9341, …) can accept a sub-rectangle of pixels and leave the rest of the panel untouched. On a slow bus that is the difference between pushing a whole frame and pushing the handful of rows that actually changed.

Implementors set the controller’s address window; the subsequent pixel writes are expected to fill area in row-major order.

Required Methods§

Source

fn set_window(&mut self, area: &Rectangle) -> Result<(), Self::Error>

Restricts subsequent pixel writes to area.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§