19 lines
874 B
Rust
19 lines
874 B
Rust
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/// Trait for filter chains that allow runtime reflection of shader parameters.
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pub trait FilterChainParameters {
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/// Gets the number of shader passes enabled at runtime.
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fn get_enabled_pass_count(&self) -> usize;
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/// Sets the number of shader passes enabled at runtime.
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fn set_enabled_pass_count(&mut self, count: usize);
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/// Enumerates the active parameters as well as their values in the current filter chain.
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fn enumerate_parameters(&self) -> std::collections::hash_map::Iter<String, f32>;
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/// Get the value of the given parameter if present.
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fn get_parameter(&self, parameter: &str) -> Option<f32>;
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/// Set the value of the given parameter if present.
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///
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/// Returns `None` if the parameter did not exist, or the old value if successful.
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fn set_parameter(&mut self, parameter: &str, new_value: f32) -> Option<f32>;
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}
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