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RenderContext

libsurfer::analog_renderer

Struct RenderContext 

Source 
pub struct RenderContext {
    pub stroke: Stroke,
    pub min_val: f64,
    pub max_val: f64,
    pub min_valid_pixel: f32,
    pub max_valid_pixel: f32,
    pub offset: f32,
    pub height_scale: f32,
    pub line_height: f32,
}
Expand description

Coordinate transformation state shared between rendering strategies. Invariant: min_val and max_val are always finite.

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§stroke: Stroke§min_val: f64§max_val: f64§min_valid_pixel: f32

Pixel position of timestamp 0 (start of signal data).

§max_valid_pixel: f32

Pixel position of last timestamp (end of signal data).

§offset: f32§height_scale: f32§line_height: f32

Implementations§

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impl RenderContext

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fn new( color: Color32, min_val: f64, max_val: f64, min_valid_pixel: f32, max_valid_pixel: f32, offset: f32, height_scale: f32, ctx: &DrawingContext<'_>, ) -> Self

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pub fn normalize(&self, value: f64) -> f32

Normalize value to [0, 1]. Invariant: min_val and max_val are always finite (guaranteed by AnalogSignalCache).

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pub fn to_screen(&self, x: f32, y: f64, ctx: &DrawingContext<'_>) -> Pos2

Convert value to screen position.

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pub fn clamp_x(&self, x: f32) -> f32

Clamp x to valid pixel range (within VCD file bounds).

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pub fn draw_line(&self, from: Pos2, to: Pos2, ctx: &mut DrawingContext<'_>)

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pub fn draw_undefined( &self, start_x: f32, end_x: f32, value: f64, ctx: &mut DrawingContext<'_>, )

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