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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `GpuFuture` trait in crate `vulkano`."><meta name="keywords" content="rust, rustlang, rust-lang, GpuFuture"><title>vulkano::sync::GpuFuture - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../vulkano/index.html'><div class='logo-container'><img src='https://raw.githubusercontent.com/vulkano-rs/vulkano/master/logo.png' alt='logo'></div></a><p class='location'>Trait GpuFuture</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.build_submission">build_submission</a><a href="#tymethod.check_buffer_access">check_buffer_access</a><a href="#tymethod.check_image_access">check_image_access</a><a href="#tymethod.cleanup_finished">cleanup_finished</a><a href="#tymethod.flush">flush</a><a href="#tymethod.queue">queue</a><a href="#tymethod.queue_change_allowed">queue_change_allowed</a><a href="#tymethod.signal_finished">signal_finished</a></div><a class="sidebar-title" href="#provided-methods">Provided Methods</a><div class="sidebar-links"><a href="#method.join">join</a><a href="#method.then_execute">then_execute</a><a href="#method.then_execute_same_queue">then_execute_same_queue</a><a href="#method.then_signal_fence">then_signal_fence</a><a href="#method.then_signal_fence_and_flush">then_signal_fence_and_flush</a><a href="#method.then_signal_semaphore">then_signal_semaphore</a><a href="#method.then_signal_semaphore_and_flush">then_signal_semaphore_and_flush</a><a href="#method.then_swapchain_present">then_swapchain_present</a><a href="#method.then_swapchain_present_incremental">then_swapchain_present_incremental</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-GpuFuture-for-Arc%3CFenceSignalFuture%3CF%3E%3E">Arc<FenceSignalFuture<F>></a><a href="#impl-GpuFuture-for-Box%3CF%3E">Box<F></a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>vulkano</a>::<wbr><a href='index.html'>sync</a></p><script>window.sidebarCurrent = {name: 'GpuFuture', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse
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fn <a href='#tymethod.cleanup_finished' class='fnname'>cleanup_finished</a>(&mut self);
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<div class='item-spacer'></div> unsafe fn <a href='#tymethod.build_submission' class='fnname'>build_submission</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="../../vulkano/command_buffer/submit/enum.SubmitAnyBuilder.html" title="enum vulkano::command_buffer::submit::SubmitAnyBuilder">SubmitAnyBuilder</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>>;
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<div class='item-spacer'></div> fn <a href='#tymethod.flush' class='fnname'>flush</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>>;
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<div class='item-spacer'></div> unsafe fn <a href='#tymethod.signal_finished' class='fnname'>signal_finished</a>(&self);
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<div class='item-spacer'></div> fn <a href='#tymethod.queue' class='fnname'>queue</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>>;
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<div class='item-spacer'></div> fn <a href='#tymethod.queue_change_allowed' class='fnname'>queue_change_allowed</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>;
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<div class='item-spacer'></div> fn <a href='#tymethod.check_buffer_access' class='fnname'>check_buffer_access</a>(<br> &self, <br> buffer: &dyn <a class="trait" href="../../vulkano/buffer/trait.BufferAccess.html" title="trait vulkano::buffer::BufferAccess">BufferAccess</a>, <br> exclusive: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, <br> queue: &<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a><br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="struct" href="../../vulkano/sync/struct.PipelineStages.html" title="struct vulkano::sync::PipelineStages">PipelineStages</a>, <a class="struct" href="../../vulkano/sync/struct.AccessFlagBits.html" title="struct vulkano::sync::AccessFlagBits">AccessFlagBits</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, <a class="enum" href="../../vulkano/sync/enum.AccessCheckError.html" title="enum vulkano::sync::AccessCheckError">AccessCheckError</a>>;
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<div class='item-spacer'></div> fn <a href='#tymethod.check_image_access' class='fnname'>check_image_access</a>(<br> &self, <br> image: &dyn <a class="trait" href="../../vulkano/image/traits/trait.ImageAccess.html" title="trait vulkano::image::traits::ImageAccess">ImageAccess</a>, <br> layout: <a class="enum" href="../../vulkano/image/enum.ImageLayout.html" title="enum vulkano::image::ImageLayout">ImageLayout</a>, <br> exclusive: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, <br> queue: &<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a><br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="struct" href="../../vulkano/sync/struct.PipelineStages.html" title="struct vulkano::sync::PipelineStages">PipelineStages</a>, <a class="struct" href="../../vulkano/sync/struct.AccessFlagBits.html" title="struct vulkano::sync::AccessFlagBits">AccessFlagBits</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, <a class="enum" href="../../vulkano/sync/enum.AccessCheckError.html" title="enum vulkano::sync::AccessCheckError">AccessCheckError</a>>;
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fn <a href='#method.join' class='fnname'>join</a><F>(self, other: F) -> <a class="struct" href="../../vulkano/sync/struct.JoinFuture.html" title="struct vulkano::sync::JoinFuture">JoinFuture</a><Self, F><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> F: <a class="trait" href="../../vulkano/sync/trait.GpuFuture.html" title="trait vulkano::sync::GpuFuture">GpuFuture</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_execute' class='fnname'>then_execute</a><Cb>(<br> self, <br> queue: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>, <br> command_buffer: Cb<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/command_buffer/struct.CommandBufferExecFuture.html" title="struct vulkano::command_buffer::CommandBufferExecFuture">CommandBufferExecFuture</a><Self, Cb>, <a class="enum" href="../../vulkano/command_buffer/enum.CommandBufferExecError.html" title="enum vulkano::command_buffer::CommandBufferExecError">CommandBufferExecError</a>><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> Cb: <a class="trait" href="../../vulkano/command_buffer/trait.CommandBuffer.html" title="trait vulkano::command_buffer::CommandBuffer">CommandBuffer</a> + 'static</span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_execute_same_queue' class='fnname'>then_execute_same_queue</a><Cb>(<br> self, <br> command_buffer: Cb<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/command_buffer/struct.CommandBufferExecFuture.html" title="struct vulkano::command_buffer::CommandBufferExecFuture">CommandBufferExecFuture</a><Self, Cb>, <a class="enum" href="../../vulkano/command_buffer/enum.CommandBufferExecError.html" title="enum vulkano::command_buffer::CommandBufferExecError">CommandBufferExecError</a>><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> Cb: <a class="trait" href="../../vulkano/command_buffer/trait.CommandBuffer.html" title="trait vulkano::command_buffer::CommandBuffer">CommandBuffer</a> + 'static</span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_signal_semaphore' class='fnname'>then_signal_semaphore</a>(self) -> <a class="struct" href="../../vulkano/sync/struct.SemaphoreSignalFuture.html" title="struct vulkano::sync::SemaphoreSignalFuture">SemaphoreSignalFuture</a><Self><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_signal_semaphore_and_flush' class='fnname'>then_signal_semaphore_and_flush</a>(<br> self<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/sync/struct.SemaphoreSignalFuture.html" title="struct vulkano::sync::SemaphoreSignalFuture">SemaphoreSignalFuture</a><Self>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_signal_fence' class='fnname'>then_signal_fence</a>(self) -> <a class="struct" href="../../vulkano/sync/struct.FenceSignalFuture.html" title="struct vulkano::sync::FenceSignalFuture">FenceSignalFuture</a><Self><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_signal_fence_and_flush' class='fnname'>then_signal_fence_and_flush</a>(<br> self<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/sync/struct.FenceSignalFuture.html" title="struct vulkano::sync::FenceSignalFuture">FenceSignalFuture</a><Self>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_swapchain_present' class='fnname'>then_swapchain_present</a><W>(<br> self, <br> queue: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>, <br> swapchain: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/swapchain/struct.Swapchain.html" title="struct vulkano::swapchain::Swapchain">Swapchain</a><W>>, <br> image_index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><br> ) -> <a class="struct" href="../../vulkano/swapchain/struct.PresentFuture.html" title="struct vulkano::swapchain::PresentFuture">PresentFuture</a><Self, W><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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<div class='item-spacer'></div> fn <a href='#method.then_swapchain_present_incremental' class='fnname'>then_swapchain_present_incremental</a><W>(<br> self, <br> queue: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>, <br> swapchain: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/swapchain/struct.Swapchain.html" title="struct vulkano::swapchain::Swapchain">Swapchain</a><W>>, <br> image_index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> present_region: <a class="struct" href="../../vulkano/swapchain/struct.PresentRegion.html" title="struct vulkano::swapchain::PresentRegion">PresentRegion</a><br> ) -> <a class="struct" href="../../vulkano/swapchain/struct.PresentFuture.html" title="struct vulkano::swapchain::PresentFuture">PresentFuture</a><Self, W><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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}</pre></div><div class='docblock'><p>Represents an event that will happen on the GPU in the future.</p>
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<p>See the documentation of the <code>sync</code> module for explanations about futures.</p>
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</div>
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<h2 id='required-methods' class='small-section-header'>Required methods<a href='#required-methods' class='anchor'></a></h2><div class='methods'><h3 id='tymethod.cleanup_finished' class='method'><code id='cleanup_finished.v'>fn <a href='#tymethod.cleanup_finished' class='fnname'>cleanup_finished</a>(&mut self)</code></h3><div class='docblock'><p>If possible, checks whether the submission has finished. If so, gives up ownership of the
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resources used by these submissions.</p>
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<p>It is highly recommended to call <code>cleanup_finished</code> from time to time. Doing so will
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prevent memory usage from increasing over time, and will also destroy the locks on
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resources used by the GPU.</p>
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</div><h3 id='tymethod.build_submission' class='method'><code id='build_submission.v'>unsafe fn <a href='#tymethod.build_submission' class='fnname'>build_submission</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="../../vulkano/command_buffer/submit/enum.SubmitAnyBuilder.html" title="enum vulkano::command_buffer::submit::SubmitAnyBuilder">SubmitAnyBuilder</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>></code></h3><div class='docblock'><p>Builds a submission that, if submitted, makes sure that the event represented by this
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<code>GpuFuture</code> will happen, and possibly contains extra elements (eg. a semaphore wait or an
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event wait) that makes the dependency with subsequent operations work.</p>
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<p>It is the responsibility of the caller to ensure that the submission is going to be
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submitted only once. However keep in mind that this function can perfectly be called
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multiple times (as long as the returned object is only submitted once).
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Also note that calling <code>flush()</code> on the future may change the value returned by
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<code>build_submission()</code>.</p>
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<p>It is however the responsibility of the implementation to not return the same submission
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from multiple different future objects. For example if you implement <code>GpuFuture</code> on
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<code>Arc<Foo></code> then <code>build_submission()</code> must always return <code>SubmitAnyBuilder::Empty</code>,
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otherwise it would be possible for the user to clone the <code>Arc</code> and make the same
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submission be submitted multiple times.</p>
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<p>It is also the responsibility of the implementation to ensure that it works if you call
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<code>build_submission()</code> and submits the returned value without calling <code>flush()</code> first. In
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other words, <code>build_submission()</code> should perform an implicit flush if necessary.</p>
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<p>Once the caller has submitted the submission and has determined that the GPU has finished
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executing it, it should call <code>signal_finished</code>. Failure to do so will incur a large runtime
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overhead, as the future will have to block to make sure that it is finished.</p>
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</div><h3 id='tymethod.flush' class='method'><code id='flush.v'>fn <a href='#tymethod.flush' class='fnname'>flush</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>></code></h3><div class='docblock'><p>Flushes the future and submits to the GPU the actions that will permit this future to
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occur.</p>
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<p>The implementation must remember that it was flushed. If the function is called multiple
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times, only the first time must result in a flush.</p>
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</div><h3 id='tymethod.signal_finished' class='method'><code id='signal_finished.v'>unsafe fn <a href='#tymethod.signal_finished' class='fnname'>signal_finished</a>(&self)</code></h3><div class='docblock'><p>Sets the future to its "complete" state, meaning that it can safely be destroyed.</p>
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<p>This must only be done if you called <code>build_submission()</code>, submitted the returned
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submission, and determined that it was finished.</p>
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<p>The implementation must be aware that this function can be called multiple times on the
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same future.</p>
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</div><h3 id='tymethod.queue' class='method'><code id='queue.v'>fn <a href='#tymethod.queue' class='fnname'>queue</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>></code></h3><div class='docblock'><p>Returns the queue that triggers the event. Returns <code>None</code> if unknown or irrelevant.</p>
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<p>If this function returns <code>None</code> and <code>queue_change_allowed</code> returns <code>false</code>, then a panic
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is likely to occur if you use this future. This is only a problem if you implement
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the <code>GpuFuture</code> trait yourself for a type outside of vulkano.</p>
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</div><h3 id='tymethod.queue_change_allowed' class='method'><code id='queue_change_allowed.v'>fn <a href='#tymethod.queue_change_allowed' class='fnname'>queue_change_allowed</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></h3><div class='docblock'><p>Returns <code>true</code> if elements submitted after this future can be submitted to a different
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queue than the other returned by <code>queue()</code>.</p>
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</div><h3 id='tymethod.check_buffer_access' class='method'><code id='check_buffer_access.v'>fn <a href='#tymethod.check_buffer_access' class='fnname'>check_buffer_access</a>(<br> &self, <br> buffer: &dyn <a class="trait" href="../../vulkano/buffer/trait.BufferAccess.html" title="trait vulkano::buffer::BufferAccess">BufferAccess</a>, <br> exclusive: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, <br> queue: &<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="struct" href="../../vulkano/sync/struct.PipelineStages.html" title="struct vulkano::sync::PipelineStages">PipelineStages</a>, <a class="struct" href="../../vulkano/sync/struct.AccessFlagBits.html" title="struct vulkano::sync::AccessFlagBits">AccessFlagBits</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, <a class="enum" href="../../vulkano/sync/enum.AccessCheckError.html" title="enum vulkano::sync::AccessCheckError">AccessCheckError</a>></code></h3><div class='docblock'><p>Checks whether submitting something after this future grants access (exclusive or shared,
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depending on the parameter) to the given buffer on the given queue.</p>
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<p>If the access is granted, returns the pipeline stage and access flags of the latest usage
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of this resource, or <code>None</code> if irrelevant.</p>
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<blockquote>
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<p><strong>Note</strong>: Returning <code>Ok</code> means "access granted", while returning <code>Err</code> means
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"don't know". Therefore returning <code>Err</code> is never unsafe.</p>
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</blockquote>
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</div><h3 id='tymethod.check_image_access' class='method'><code id='check_image_access.v'>fn <a href='#tymethod.check_image_access' class='fnname'>check_image_access</a>(<br> &self, <br> image: &dyn <a class="trait" href="../../vulkano/image/traits/trait.ImageAccess.html" title="trait vulkano::image::traits::ImageAccess">ImageAccess</a>, <br> layout: <a class="enum" href="../../vulkano/image/enum.ImageLayout.html" title="enum vulkano::image::ImageLayout">ImageLayout</a>, <br> exclusive: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, <br> queue: &<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="struct" href="../../vulkano/sync/struct.PipelineStages.html" title="struct vulkano::sync::PipelineStages">PipelineStages</a>, <a class="struct" href="../../vulkano/sync/struct.AccessFlagBits.html" title="struct vulkano::sync::AccessFlagBits">AccessFlagBits</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, <a class="enum" href="../../vulkano/sync/enum.AccessCheckError.html" title="enum vulkano::sync::AccessCheckError">AccessCheckError</a>></code></h3><div class='docblock'><p>Checks whether submitting something after this future grants access (exclusive or shared,
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depending on the parameter) to the given image on the given queue.</p>
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<p>If the access is granted, returns the pipeline stage and access flags of the latest usage
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of this resource, or <code>None</code> if irrelevant.</p>
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<p>Implementations must ensure that the image is in the given layout. However if the <code>layout</code>
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is <code>Undefined</code> then the implementation should accept any actual layout.</p>
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<blockquote>
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<p><strong>Note</strong>: Returning <code>Ok</code> means "access granted", while returning <code>Err</code> means
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"don't know". Therefore returning <code>Err</code> is never unsafe.</p>
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</blockquote>
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<blockquote>
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<p><strong>Note</strong>: Keep in mind that changing the layout of an image also requires exclusive
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access.</p>
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</blockquote>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='provided-methods' class='small-section-header'>Provided methods<a href='#provided-methods' class='anchor'></a></h2><div class='methods'><h3 id='method.join' class='method'><code id='join.v'>fn <a href='#method.join' class='fnname'>join</a><F>(self, other: F) -> <a class="struct" href="../../vulkano/sync/struct.JoinFuture.html" title="struct vulkano::sync::JoinFuture">JoinFuture</a><Self, F> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> F: <a class="trait" href="../../vulkano/sync/trait.GpuFuture.html" title="trait vulkano::sync::GpuFuture">GpuFuture</a>, </span></code></h3><div class='docblock'><p>Joins this future with another one, representing the moment when both events have happened.</p>
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</div><h3 id='method.then_execute' class='method'><code id='then_execute.v'>fn <a href='#method.then_execute' class='fnname'>then_execute</a><Cb>(<br> self, <br> queue: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>, <br> command_buffer: Cb<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/command_buffer/struct.CommandBufferExecFuture.html" title="struct vulkano::command_buffer::CommandBufferExecFuture">CommandBufferExecFuture</a><Self, Cb>, <a class="enum" href="../../vulkano/command_buffer/enum.CommandBufferExecError.html" title="enum vulkano::command_buffer::CommandBufferExecError">CommandBufferExecError</a>> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> Cb: <a class="trait" href="../../vulkano/command_buffer/trait.CommandBuffer.html" title="trait vulkano::command_buffer::CommandBuffer">CommandBuffer</a> + 'static, </span></code></h3><div class='docblock'><p>Executes a command buffer after this future.</p>
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<blockquote>
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<p><strong>Note</strong>: This is just a shortcut function. The actual implementation is in the
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<code>CommandBuffer</code> trait.</p>
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</blockquote>
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</div><h3 id='method.then_execute_same_queue' class='method'><code id='then_execute_same_queue.v'>fn <a href='#method.then_execute_same_queue' class='fnname'>then_execute_same_queue</a><Cb>(<br> self, <br> command_buffer: Cb<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/command_buffer/struct.CommandBufferExecFuture.html" title="struct vulkano::command_buffer::CommandBufferExecFuture">CommandBufferExecFuture</a><Self, Cb>, <a class="enum" href="../../vulkano/command_buffer/enum.CommandBufferExecError.html" title="enum vulkano::command_buffer::CommandBufferExecError">CommandBufferExecError</a>> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,<br> Cb: <a class="trait" href="../../vulkano/command_buffer/trait.CommandBuffer.html" title="trait vulkano::command_buffer::CommandBuffer">CommandBuffer</a> + 'static, </span></code></h3><div class='docblock'><p>Executes a command buffer after this future, on the same queue as the future.</p>
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<blockquote>
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<p><strong>Note</strong>: This is just a shortcut function. The actual implementation is in the
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<code>CommandBuffer</code> trait.</p>
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</blockquote>
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</div><h3 id='method.then_signal_semaphore' class='method'><code id='then_signal_semaphore.v'>fn <a href='#method.then_signal_semaphore' class='fnname'>then_signal_semaphore</a>(self) -> <a class="struct" href="../../vulkano/sync/struct.SemaphoreSignalFuture.html" title="struct vulkano::sync::SemaphoreSignalFuture">SemaphoreSignalFuture</a><Self> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></h3><div class='docblock'><p>Signals a semaphore after this future. Returns another future that represents the signal.</p>
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<p>Call this function when you want to execute some operations on a queue and want to see the
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result on another queue.</p>
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</div><h3 id='method.then_signal_semaphore_and_flush' class='method'><code id='then_signal_semaphore_and_flush.v'>fn <a href='#method.then_signal_semaphore_and_flush' class='fnname'>then_signal_semaphore_and_flush</a>(<br> self<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/sync/struct.SemaphoreSignalFuture.html" title="struct vulkano::sync::SemaphoreSignalFuture">SemaphoreSignalFuture</a><Self>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></h3><div class='docblock'><p>Signals a semaphore after this future and flushes it. Returns another future that
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represents the moment when the semaphore is signalled.</p>
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<p>This is a just a shortcut for <code>then_signal_semaphore()</code> followed with <code>flush()</code>.</p>
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<p>When you want to execute some operations A on a queue and some operations B on another
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queue that need to see the results of A, it can be a good idea to submit A as soon as
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possible while you're preparing B.</p>
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<p>If you ran A and B on the same queue, you would have to decide between submitting A then
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B, or A and B simultaneously. Both approaches have their trade-offs. But if A and B are
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on two different queues, then you would need two submits anyway and it is always
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advantageous to submit A as soon as possible.</p>
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</div><h3 id='method.then_signal_fence' class='method'><code id='then_signal_fence.v'>fn <a href='#method.then_signal_fence' class='fnname'>then_signal_fence</a>(self) -> <a class="struct" href="../../vulkano/sync/struct.FenceSignalFuture.html" title="struct vulkano::sync::FenceSignalFuture">FenceSignalFuture</a><Self> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></h3><div class='docblock'><p>Signals a fence after this future. Returns another future that represents the signal.</p>
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<blockquote>
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<p><strong>Note</strong>: More often than not you want to immediately flush the future after calling this
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function. If so, consider using <code>then_signal_fence_and_flush</code>.</p>
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</blockquote>
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</div><h3 id='method.then_signal_fence_and_flush' class='method'><code id='then_signal_fence_and_flush.v'>fn <a href='#method.then_signal_fence_and_flush' class='fnname'>then_signal_fence_and_flush</a>(<br> self<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../vulkano/sync/struct.FenceSignalFuture.html" title="struct vulkano::sync::FenceSignalFuture">FenceSignalFuture</a><Self>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></h3><div class='docblock'><p>Signals a fence after this future. Returns another future that represents the signal.</p>
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<p>This is a just a shortcut for <code>then_signal_fence()</code> followed with <code>flush()</code>.</p>
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</div><h3 id='method.then_swapchain_present' class='method'><code id='then_swapchain_present.v'>fn <a href='#method.then_swapchain_present' class='fnname'>then_swapchain_present</a><W>(<br> self, <br> queue: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>, <br> swapchain: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/swapchain/struct.Swapchain.html" title="struct vulkano::swapchain::Swapchain">Swapchain</a><W>>, <br> image_index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><br>) -> <a class="struct" href="../../vulkano/swapchain/struct.PresentFuture.html" title="struct vulkano::swapchain::PresentFuture">PresentFuture</a><Self, W> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></h3><div class='docblock'><p>Presents a swapchain image after this future.</p>
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<p>You should only ever do this indirectly after a <code>SwapchainAcquireFuture</code> of the same image,
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otherwise an error will occur when flushing.</p>
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<blockquote>
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<p><strong>Note</strong>: This is just a shortcut for the <code>Swapchain::present()</code> function.</p>
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</blockquote>
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</div><h3 id='method.then_swapchain_present_incremental' class='method'><code id='then_swapchain_present_incremental.v'>fn <a href='#method.then_swapchain_present_incremental' class='fnname'>then_swapchain_present_incremental</a><W>(<br> self, <br> queue: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>, <br> swapchain: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/swapchain/struct.Swapchain.html" title="struct vulkano::swapchain::Swapchain">Swapchain</a><W>>, <br> image_index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> present_region: <a class="struct" href="../../vulkano/swapchain/struct.PresentRegion.html" title="struct vulkano::swapchain::PresentRegion">PresentRegion</a><br>) -> <a class="struct" href="../../vulkano/swapchain/struct.PresentFuture.html" title="struct vulkano::swapchain::PresentFuture">PresentFuture</a><Self, W> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></h3><div class='docblock'><p>Same as <code>then_swapchain_present</code>, except it allows specifying a present region.</p>
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<blockquote>
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<p><strong>Note</strong>: This is just a shortcut for the <code>Swapchain::present_incremental()</code> function.</p>
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</blockquote>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='foreign-impls' class='small-section-header'>Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a></h2><h3 id='impl-GpuFuture-for-Arc%3CFenceSignalFuture%3CF%3E%3E' class='impl'><code class='in-band'>impl<F> <a class="trait" href="../../vulkano/sync/trait.GpuFuture.html" title="trait vulkano::sync::GpuFuture">GpuFuture</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/sync/struct.FenceSignalFuture.html" title="struct vulkano::sync::FenceSignalFuture">FenceSignalFuture</a><F>> <span class="where fmt-newline">where<br> F: <a class="trait" href="../../vulkano/sync/trait.GpuFuture.html" title="trait vulkano::sync::GpuFuture">GpuFuture</a>, </span></code><a href='#impl-GpuFuture-for-Arc%3CFenceSignalFuture%3CF%3E%3E' class='anchor'></a><a class='srclink' href='../../src/vulkano/sync/future/fence_signal.rs.html#457-505' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.cleanup_finished' class="method hidden"><code id='cleanup_finished.v-1'>fn <a href='#method.cleanup_finished' class='fnname'>cleanup_finished</a>(&mut self)</code><a class='srclink' href='../../src/vulkano/sync/future/fence_signal.rs.html#461-463' title='goto source code'>[src]</a></h4><h4 id='method.build_submission' class="method hidden"><code id='build_submission.v-1'>unsafe fn <a href='#method.build_submission' class='fnname'>build_submission</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="../../vulkano/command_buffer/submit/enum.SubmitAnyBuilder.html" title="enum vulkano::command_buffer::submit::SubmitAnyBuilder">SubmitAnyBuilder</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>></code><a class='srclink' href='../../src/vulkano/sync/future/fence_signal.rs.html#466-470' title='goto source code'>[src]</a></h4><h4 id='method.flush' class="method hidden"><code id='flush.v-1'>fn <a href='#method.flush' class='fnname'>flush</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>></code><a class='srclink' href='../../src/vulkano/sync/future/fence_signal.rs.html#473-475' title='goto source code'>[src]</a></h4><h4 id='method.signal_finished' class="method hidden"><code id='signal_finished.v-1'>unsafe fn <a href='#method.signal_finished' class='fnname'>signal_finished</a>(&self)</code><a class='srclink' href='../../src/vulkano/sync/future/fence_signal.rs.html#478-480' title='goto source code'>[src]</a></h4><h4 id='method.queue_change_allowed' class="method hidden"><code id='queue_change_allowed.v-1'>fn <a href='#method.queue_change_allowed' class='fnname'>queue_change_allowed</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='../../src/vulkano/sync/future/fence_signal.rs.html#483-485' title='goto source code'>[src]</a></h4><h4 id='method.queue' class="method hidden"><code id='queue.v-1'>fn <a href='#method.queue' class='fnname'>queue</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>></code><a class='srclink' href='../../src/vulkano/sync/future/fence_signal.rs.html#488-490' titl
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<h2 id='implementors' class='small-section-header'>Implementors<a href='#implementors' class='anchor'></a></h2><div class='item-list' id='implementors-list'><h3 id='impl-GpuFuture' class='impl'><code class='in-band'>impl GpuFuture for <a class="struct" href="../../vulkano/sync/struct.NowFuture.html" title="struct vulkano::sync::NowFuture">NowFuture</a></code><a href='#impl-GpuFuture' class='anchor'></a><a class='srclink' href='../../src/vulkano/sync/future/now.rs.html#36-77' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.cleanup_finished-2' class="method hidden"><code id='cleanup_finished.v-3'>fn <a href='#method.cleanup_finished-2' class='fnname'>cleanup_finished</a>(&mut self)</code><a class='srclink' href='../../src/vulkano/sync/future/now.rs.html#38-39' title='goto source code'>[src]</a></h4><h4 id='method.build_submission-2' class="method hidden"><code id='build_submission.v-3'>unsafe fn <a href='#method.build_submission-2' class='fnname'>build_submission</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="../../vulkano/command_buffer/submit/enum.SubmitAnyBuilder.html" title="enum vulkano::command_buffer::submit::SubmitAnyBuilder">SubmitAnyBuilder</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>></code><a class='srclink' href='../../src/vulkano/sync/future/now.rs.html#42-44' title='goto source code'>[src]</a></h4><h4 id='method.flush-2' class="method hidden"><code id='flush.v-3'>fn <a href='#method.flush-2' class='fnname'>flush</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="enum" href="../../vulkano/sync/enum.FlushError.html" title="enum vulkano::sync::FlushError">FlushError</a>></code><a class='srclink' href='../../src/vulkano/sync/future/now.rs.html#47-49' title='goto source code'>[src]</a></h4><h4 id='method.signal_finished-2' class="method hidden"><code id='signal_finished.v-3'>unsafe fn <a href='#method.signal_finished-2' class='fnname'>signal_finished</a>(&self)</code><a class='srclink' href='../../src/vulkano/sync/future/now.rs.html#52-53' title='goto source code'>[src]</a></h4><h4 id='method.queue_change_allowed-2' class="method hidden"><code id='queue_change_allowed.v-3'>fn <a href='#method.queue_change_allowed-2' class='fnname'>queue_change_allowed</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='../../src/vulkano/sync/future/now.rs.html#56-58' title='goto source code'>[src]</a></h4><h4 id='method.queue-2' class="method hidden"><code id='queue.v-3'>fn <a href='#method.queue-2' class='fnname'>queue</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="struct" href="../../vulkano/device/struct.Queue.html" title="struct vulkano::device::Queue">Queue</a>>></code><a class='srclink' href='../../src/vulkano/sync/future/now.rs.html#61-63' title='goto source code'>[src]</a></h4><h4 id='method.check_buffer_access-2' class="method hidden"><code id='check_buffer_access.v-3'>fn <a href='#method.check_buffer_access-2' class='fnname'>check_buffer_access</a>(<br> &self, <br> buffer: &dyn <a class="trait" href="../../vulkano/buffer/trait.BufferAccess.html" title="trait vulkano::buffer::BufferAccess">BufferAccess</a>, <br> _: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, <br> _: &
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