Struct BudgetControllerConfig 

pub struct BudgetControllerConfig {
    pub pid: PidGains,
    pub eprocess: EProcessConfig,
    pub target: Duration,
    pub degrade_threshold: f64,
    pub upgrade_threshold: f64,
    pub cooldown_frames: u32,
    pub degradation_floor: DegradationLevel,
}

Configuration for the adaptive budget controller.

Fields

pid: PidGains

PID controller gains.

eprocess: EProcessConfig

E-process configuration.

target: Duration

Target frame time.

degrade_threshold: f64

Hysteresis: PID output must exceed this to trigger degradation.

This prevents oscillation at the boundary. The value is in normalized units (error / target). Default: 0.3 (30% of target).

Justification

A threshold of 0.3 means the controller needs ~5ms sustained error at 16ms target before degrading. This filters out single-frame jitter while remaining responsive to genuine overload (2-3 consecutive slow frames will cross the threshold via integral accumulation).

upgrade_threshold: f64

Hysteresis: PID output must be below negative of this to trigger upgrade. Default: 0.2 (20% of target).

cooldown_frames: u32

Cooldown frames between level changes.

degradation_floor: DegradationLevel

Minimum quality floor: the controller will never degrade past this level.

Default: DegradationLevel::SimpleBorders — preserves readable text content while still allowing border simplification.

Setting this to DegradationLevel::Full disables all degradation. Setting this to DegradationLevel::SkipFrame effectively removes the floor.

Trait Implementations

impl Clone for BudgetControllerConfig

fn clone(&self) -> BudgetControllerConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BudgetControllerConfig

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

Formats the value using the given formatter.

impl Default for BudgetControllerConfig

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for BudgetControllerConfig

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for BudgetControllerConfig