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webgl: Support preserveDrawingBuffer.

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This commit is contained in:
Josh Matthews 2020-07-28 13:08:32 -04:00
parent 08328c22d6
commit a5e488bc2c
6 changed files with 29 additions and 21 deletions
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2
components/webrender_surfman/Cargo.toml
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@ -13,5 +13,5 @@ path = "lib.rs"
[dependencies]
euclid = "0.20"
surfman = "0.3"
surfman-chains = "0.4"
surfman-chains = "0.5"

2
components/webrender_surfman/lib.rs
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@ -147,7 +147,7 @@ impl WebrenderSurfman {
let ref mut device = self.0.device.borrow_mut();
let ref mut context = self.0.context.borrow_mut();
if let Some(ref swap_chain) = self.0.swap_chain {
return swap_chain.swap_buffers(device, context);
return swap_chain.swap_buffers(device, context, surfman_chains::PreserveBuffer::No);
}
let mut surface = device.unbind_surface_from_context(context)?.unwrap();
device.present_surface(context, &mut surface)?;