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46 lines
2.6 KiB
Markdown
46 lines
2.6 KiB
Markdown
# News
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## Fixed panics do to not specifying the correct `usage`
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Wgpu has become more strict about what `BufferUsage`s and `TextureUsage`s are required when performing certain operations. For example int the [Wgpu without a window example](/intermediate/windowless/), the `texture_desc` only specified the usage to by `COPY_SRC`. This caused a crash when the `texture` was used as a render target. Adding `OUTPUT_ATTACHMENT` fixed the issue.
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## Updating Winit from 0.20.0-alpha5 to 0.20
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There were a lot of small changes to how the dpi stuff works. You can see all the changes [in the changelog](https://github.com/rust-windowing/winit/blob/master/CHANGELOG.md). That means that some of the tutorials had to change.
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* I've removed `hidpi_factor` from `State` entirely. They removed the `hidpi_factor()` method from `winit::window::Window`, and changed `inner_size()` to return `PhysicalSize` instead of `LogicalSize`, so we don't need to store the `hidpi_factor` anymore.
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* `update_hidpi_and_resize` is no more. Since `ScaleFactorChanged` passes in the windows new `PhysicalSize`, we can simply use `resize()`.
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* `State::size` is now `PhysicalSize<u32>` instead of the pre 0.20 `LogicalSize`.
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* `EventsCleared` is now `MainEventsCleared`.
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I may have missed a change, but I made sure that all the examples compile an run, so if you have trouble with your code you can use them as a reference.
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## Changed tutorial examples to use a src directory
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I wasn't using the traditional cargo binary folder setup. I've changed it to the standardized form now.
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## Updating to 0.4 from 0.3
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There are a few things that have changed:
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1. The use of `Instance` has been removed. Creating a `Surface` and requesting an `Adapter` are done as follows.
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```rust
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let surface = wgpu::Surface::create(window);
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let adapter = wgpu::Adapter::request(&wgpu::RequestAdapterOptions {
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..Default::default()
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}).unwrap(); // needs to be unwrapped
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```
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2. The `request_device` method now returns a `(Device, Queue)` tuple. This means that you can borrow the `Queue` mutably while using the `Device` immutably. Because of this change, submitting `CommandBuffer`s to the queue uses the `submit` method on the `Queue` directly.
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```rust
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self.queue.submit(&[
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encoder.finish()
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]);
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```
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3. The `create` method on `Surface` takes in any struct that implements the `HasRawWindow` trait, instead of a `RawWindowHandle`. This means that the `raw-window-handle = "0.3"` line in `Cargo.toml` is no longer needed.
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I don't know if this is a change from 0.4, but you use `wgpu = "0.4"` line in dependencies instead of the `[dependencies.wgpu]` as wgpu will determine the best back end for you.
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## New/Recent Articles
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<RecentArticles/>
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