Trait slint::platform::software_renderer::LineBufferProvider
pub trait LineBufferProvider {
type TargetPixel: TargetPixel;
// Required method
fn process_line(
&mut self,
line: usize,
range: Range<usize>,
render_fn: impl FnOnce(&mut [Self::TargetPixel])
);
}
Expand description
This trait defines a bi-directional interface between Slint and your code to send lines to your screen, when using
the SoftwareRenderer::render_by_line
function.
- Through the associated
TargetPixel
type Slint knows how to create and manipulate pixels without having to know the exact device-specific binary representation and operations for blending. - Through the
process_line
function Slint notifies you when a line can be rendered and provides a callback that you can invoke to fill a slice of pixels for the given line.
See the render_by_line
documentation for an example.
Required Associated Types§
type TargetPixel: TargetPixel
type TargetPixel: TargetPixel
The pixel type of the buffer
Required Methods§
fn process_line(
&mut self,
line: usize,
range: Range<usize>,
render_fn: impl FnOnce(&mut [Self::TargetPixel])
)
fn process_line( &mut self, line: usize, range: Range<usize>, render_fn: impl FnOnce(&mut [Self::TargetPixel]) )
Called once per line, you will have to call the render_fn back with the buffer.
The line
is the y position of the line to be drawn.
The range
is the range within the line that is going to be rendered (eg, within the dirty region)
The render_fn
function should be called to render the line, passing the buffer
corresponding to the specified line and range.
Object Safety§
This trait is not object safe.