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pick seed <= u32::MAX when using metal #3045

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Merged
greenrazer merged 1 commit into from
Aug 20, 2025
Merged

pick seed <= u32::MAX when using metal #3045

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13 changes: 12 additions & 1 deletion candle-examples/examples/stable-diffusion/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -617,7 +617,18 @@ fn run(args: Args) -> Result<()> {
let mut scheduler = sd_config.build_scheduler(n_steps)?;
let device = candle_examples::device(cpu)?;
// If a seed is not given, generate a random seed and print it
let seed = seed.unwrap_or(rand::rng().random_range(0u64..u64::MAX));
let seed = seed.unwrap_or_else(|| {
#[cfg(feature = "metal")]
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{
// Metal backend requires seed to be within u32 range
rand::rng().random_range(0u64..u32::MAX as u64)
}
#[cfg(not(feature = "metal"))]
{
rand::rng().random_range(0u64..u64::MAX)
}
});

println!("Using seed {seed}");
device.set_seed(seed)?;
let use_guide_scale = guidance_scale > 1.0;
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