update `wgpu` to `0.13`

15 files changed, 141 insertions, 145 deletions

diff --git a/examples/integration_wgpu/src/main.rs b/examples/integration_wgpu/src/main.rs
index 045ee0d3..7235e72b 100644
--- a/examples/integration_wgpu/src/main.rs
+++ b/examples/integration_wgpu/src/main.rs
@@ -7,7 +7,6 @@ use scene::Scene;
 use iced_wgpu::{wgpu, Backend, Renderer, Settings, Viewport};
 use iced_winit::{conversion, futures, program, winit, Clipboard, Debug, Size};
 
-use futures::task::SpawnExt;
 use winit::{
     dpi::PhysicalPosition,
     event::{Event, ModifiersState, WindowEvent},
@@ -90,9 +89,7 @@ pub fn main() {
         let needed_limits = wgpu::Limits::default();
 
         (
-            surface
-                .get_preferred_format(&adapter)
-                .expect("Get preferred format"),
+            surface.get_supported_formats(&adapter)[0],
             adapter
                 .request_device(
                     &wgpu::DeviceDescriptor {
@@ -114,15 +111,14 @@ pub fn main() {
             format,
             width: physical_size.width,
             height: physical_size.height,
-            present_mode: wgpu::PresentMode::Mailbox,
+            present_mode: wgpu::PresentMode::AutoVsync,
         },
     );
 
     let mut resized = false;
 
-    // Initialize staging belt and local pool
+    // Initialize staging belt
     let mut staging_belt = wgpu::util::StagingBelt::new(5 * 1024);
-    let mut local_pool = futures::executor::LocalPool::new();
 
     // Initialize scene and GUI controls
     let scene = Scene::new(&mut device, format);
@@ -207,7 +203,7 @@ pub fn main() {
                             format: format,
                             width: size.width,
                             height: size.height,
-                            present_mode: wgpu::PresentMode::Mailbox,
+                            present_mode: wgpu::PresentMode::AutoVsync,
                         },
                     );
 
@@ -262,12 +258,8 @@ pub fn main() {
                          );
 
                         // And recall staging buffers
-                        local_pool
-                            .spawner()
-                            .spawn(staging_belt.recall())
-                            .expect("Recall staging buffers");
+                        staging_belt.recall();
 
-                        local_pool.run_until_stalled();
                     }
                     Err(error) => match error {
                         wgpu::SurfaceError::OutOfMemory => {
diff --git a/examples/integration_wgpu/src/scene.rs b/examples/integration_wgpu/src/scene.rs
index fbda1326..af75e67c 100644
--- a/examples/integration_wgpu/src/scene.rs
+++ b/examples/integration_wgpu/src/scene.rs
@@ -23,7 +23,7 @@ impl Scene {
     ) -> wgpu::RenderPass<'a> {
         encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
             label: None,
-            color_attachments: &[wgpu::RenderPassColorAttachment {
+            color_attachments: &[Some(wgpu::RenderPassColorAttachment {
                 view: target,
                 resolve_target: None,
                 ops: wgpu::Operations {
@@ -39,7 +39,7 @@ impl Scene {
                     }),
                     store: true,
                 },
-            }],
+            })],
             depth_stencil_attachment: None,
         })
     }
@@ -55,8 +55,8 @@ fn build_pipeline(
     texture_format: wgpu::TextureFormat,
 ) -> wgpu::RenderPipeline {
     let (vs_module, fs_module) = (
-        device.create_shader_module(&wgpu::include_wgsl!("shader/vert.wgsl")),
-        device.create_shader_module(&wgpu::include_wgsl!("shader/frag.wgsl")),
+        device.create_shader_module(wgpu::include_wgsl!("shader/vert.wgsl")),
+        device.create_shader_module(wgpu::include_wgsl!("shader/frag.wgsl")),
     );
 
     let pipeline_layout =
@@ -78,14 +78,14 @@ fn build_pipeline(
             fragment: Some(wgpu::FragmentState {
                 module: &fs_module,
                 entry_point: "main",
-                targets: &[wgpu::ColorTargetState {
+                targets: &[Some(wgpu::ColorTargetState {
                     format: texture_format,
                     blend: Some(wgpu::BlendState {
                         color: wgpu::BlendComponent::REPLACE,
                         alpha: wgpu::BlendComponent::REPLACE,
                     }),
                     write_mask: wgpu::ColorWrites::ALL,
-                }],
+                })],
             }),
             primitive: wgpu::PrimitiveState {
                 topology: wgpu::PrimitiveTopology::TriangleList,
diff --git a/examples/integration_wgpu/src/shader/frag.wgsl b/examples/integration_wgpu/src/shader/frag.wgsl
index a6f61336..cf27bb56 100644
--- a/examples/integration_wgpu/src/shader/frag.wgsl
+++ b/examples/integration_wgpu/src/shader/frag.wgsl
@@ -1,4 +1,4 @@
-[[stage(fragment)]]
-fn main() -> [[location(0)]] vec4<f32> {
+@fragment
+fn main() -> @location(0) vec4<f32> {
     return vec4<f32>(1.0, 0.0, 0.0, 1.0);
 }
diff --git a/examples/integration_wgpu/src/shader/vert.wgsl b/examples/integration_wgpu/src/shader/vert.wgsl
index 7ef47fb2..e353e6ba 100644
--- a/examples/integration_wgpu/src/shader/vert.wgsl
+++ b/examples/integration_wgpu/src/shader/vert.wgsl
@@ -1,5 +1,5 @@
-[[stage(vertex)]]
-fn main([[builtin(vertex_index)]] in_vertex_index: u32) -> [[builtin(position)]] vec4<f32> {
+@vertex
+fn main(@builtin(vertex_index) in_vertex_index: u32) -> @builtin(position) vec4<f32> {
     let x = f32(1 - i32(in_vertex_index)) * 0.5;
     let y = f32(1 - i32(in_vertex_index & 1u) * 2) * 0.5;
     return vec4<f32>(x, y, 0.0, 1.0);
diff --git a/wgpu/Cargo.toml b/wgpu/Cargo.toml
index a4378aa0..803f3e3b 100644
--- a/wgpu/Cargo.toml
+++ b/wgpu/Cargo.toml
@@ -28,8 +28,8 @@ spirv = ["wgpu/spirv"]
 webgl = ["wgpu/webgl"]
 
 [dependencies]
-wgpu = "0.12"
-wgpu_glyph = "0.16"
+wgpu = "0.13"
+wgpu_glyph = {version = "0.16",path = "../../wgpu_glyph"}
 glyph_brush = "0.7"
 raw-window-handle = "0.4"
 log = "0.4"
@@ -39,7 +39,7 @@ kamadak-exif = "0.5"
 bitflags = "1.2"
 
 [dependencies.bytemuck]
-version = "1.4"
+version = "1.9"
 features = ["derive"]
 
 [dependencies.iced_native]
diff --git a/wgpu/src/image.rs b/wgpu/src/image.rs
index 0fefbfaf..750ad62a 100644
--- a/wgpu/src/image.rs
+++ b/wgpu/src/image.rs
@@ -136,7 +136,7 @@ impl Pipeline {
             });
 
         let shader =
-            device.create_shader_module(&wgpu::ShaderModuleDescriptor {
+            device.create_shader_module(wgpu::ShaderModuleDescriptor {
                 label: Some("iced_wgpu::image::shader"),
                 source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(
                     include_str!("shader/image.wgsl"),
@@ -176,7 +176,7 @@ impl Pipeline {
                 fragment: Some(wgpu::FragmentState {
                     module: &shader,
                     entry_point: "fs_main",
-                    targets: &[wgpu::ColorTargetState {
+                    targets: &[Some(wgpu::ColorTargetState {
                         format,
                         blend: Some(wgpu::BlendState {
                             color: wgpu::BlendComponent {
@@ -191,7 +191,7 @@ impl Pipeline {
                             },
                         }),
                         write_mask: wgpu::ColorWrites::ALL,
-                    }],
+                    })],
                 }),
                 primitive: wgpu::PrimitiveState {
                     topology: wgpu::PrimitiveTopology::TriangleList,
@@ -406,14 +406,16 @@ impl Pipeline {
             let mut render_pass =
                 encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
                     label: Some("iced_wgpu::image render pass"),
-                    color_attachments: &[wgpu::RenderPassColorAttachment {
-                        view: target,
-                        resolve_target: None,
-                        ops: wgpu::Operations {
-                            load: wgpu::LoadOp::Load,
-                            store: true,
+                    color_attachments: &[Some(
+                        wgpu::RenderPassColorAttachment {
+                            view: target,
+                            resolve_target: None,
+                            ops: wgpu::Operations {
+                                load: wgpu::LoadOp::Load,
+                                store: true,
+                            },
                         },
-                    }],
+                    )],
                     depth_stencil_attachment: None,
                 });
 
diff --git a/wgpu/src/quad.rs b/wgpu/src/quad.rs
index 22f3b815..a117df64 100644
--- a/wgpu/src/quad.rs
+++ b/wgpu/src/quad.rs
@@ -59,7 +59,7 @@ impl Pipeline {
             });
 
         let shader =
-            device.create_shader_module(&wgpu::ShaderModuleDescriptor {
+            device.create_shader_module(wgpu::ShaderModuleDescriptor {
                 label: Some("iced_wgpu::quad::shader"),
                 source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(
                     include_str!("shader/quad.wgsl"),
@@ -100,7 +100,7 @@ impl Pipeline {
                 fragment: Some(wgpu::FragmentState {
                     module: &shader,
                     entry_point: "fs_main",
-                    targets: &[wgpu::ColorTargetState {
+                    targets: &[Some(wgpu::ColorTargetState {
                         format,
                         blend: Some(wgpu::BlendState {
                             color: wgpu::BlendComponent {
@@ -115,7 +115,7 @@ impl Pipeline {
                             },
                         }),
                         write_mask: wgpu::ColorWrites::ALL,
-                    }],
+                    })],
                 }),
                 primitive: wgpu::PrimitiveState {
                     topology: wgpu::PrimitiveTopology::TriangleList,
@@ -211,14 +211,16 @@ impl Pipeline {
                 let mut render_pass =
                     encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
                         label: Some("iced_wgpu::quad render pass"),
-                        color_attachments: &[wgpu::RenderPassColorAttachment {
-                            view: target,
-                            resolve_target: None,
-                            ops: wgpu::Operations {
-                                load: wgpu::LoadOp::Load,
-                                store: true,
+                        color_attachments: &[Some(
+                            wgpu::RenderPassColorAttachment {
+                                view: target,
+                                resolve_target: None,
+                                ops: wgpu::Operations {
+                                    load: wgpu::LoadOp::Load,
+                                    store: true,
+                                },
                             },
-                        }],
+                        )],
                         depth_stencil_attachment: None,
                     });
 
diff --git a/wgpu/src/settings.rs b/wgpu/src/settings.rs
index 23b55904..7bc752ff 100644
--- a/wgpu/src/settings.rs
+++ b/wgpu/src/settings.rs
@@ -63,7 +63,7 @@ impl Settings {
 impl Default for Settings {
     fn default() -> Settings {
         Settings {
-            present_mode: wgpu::PresentMode::Mailbox,
+            present_mode: wgpu::PresentMode::AutoVsync,
             internal_backend: wgpu::Backends::all(),
             default_font: None,
             default_text_size: 20,
diff --git a/wgpu/src/shader/blit.wgsl b/wgpu/src/shader/blit.wgsl
index f8f6e2d4..5ff86f0a 100644
--- a/wgpu/src/shader/blit.wgsl
+++ b/wgpu/src/shader/blit.wgsl
@@ -16,19 +16,19 @@ var<private> uvs: array<vec2<f32>, 6> = array<vec2<f32>, 6>(
     vec2<f32>(1.0, 1.0)
 );
 
-[[group(0), binding(0)]] var u_sampler: sampler;
-[[group(1), binding(0)]] var u_texture: texture_2d<f32>;
+@group(0) @binding(0) var u_sampler: sampler;
+@group(1) @binding(0) var u_texture: texture_2d<f32>;
 
 struct VertexInput {
-    [[builtin(vertex_index)]] vertex_index: u32;
+    @builtin(vertex_index) vertex_index: u32,
 };
 
 struct VertexOutput {
-    [[builtin(position)]] position: vec4<f32>;
-    [[location(0)]] uv: vec2<f32>;
+    @builtin(position) position: vec4<f32>,
+    @location(0) uv: vec2<f32>,
 };
 
-[[stage(vertex)]]
+@vertex
 fn vs_main(input: VertexInput) -> VertexOutput {
     var out: VertexOutput;
     out.uv = uvs[input.vertex_index];
@@ -37,7 +37,7 @@ fn vs_main(input: VertexInput) -> VertexOutput {
     return out;
 }
 
-[[stage(fragment)]]
-fn fs_main(input: VertexOutput) -> [[location(0)]] vec4<f32> {
+@fragment
+fn fs_main(input: VertexOutput) -> @location(0) vec4<f32> {
     return textureSample(u_texture, u_sampler, input.uv);
 }
diff --git a/wgpu/src/shader/image.wgsl b/wgpu/src/shader/image.wgsl
index ff304422..bb1c6b9d 100644
--- a/wgpu/src/shader/image.wgsl
+++ b/wgpu/src/shader/image.wgsl
@@ -2,26 +2,26 @@ struct Globals {
     transform: mat4x4<f32>;
 };
 
-[[group(0), binding(0)]] var<uniform> globals: Globals;
-[[group(0), binding(1)]] var u_sampler: sampler;
-[[group(1), binding(0)]] var u_texture: texture_2d_array<f32>;
+@group(0) @binding(0) var<uniform> globals: Globals;
+@group(0) @binding(1) var u_sampler: sampler;
+@group(1) @binding(0) var u_texture: texture_2d_array<f32>;
 
 struct VertexInput {
-    [[location(0)]] v_pos: vec2<f32>;
-    [[location(1)]] pos: vec2<f32>;
-    [[location(2)]] scale: vec2<f32>;
-    [[location(3)]] atlas_pos: vec2<f32>;
-    [[location(4)]] atlas_scale: vec2<f32>;
-    [[location(5)]] layer: i32;
+    @location(0) v_pos: vec2<f32>,
+    @location(1) pos: vec2<f32>,
+    @location(2) scale: vec2<f32>,
+    @location(3) atlas_pos: vec2<f32>,
+    @location(4) atlas_scale: vec2<f32>,
+    @location(5) layer: i32,
 };
 
 struct VertexOutput {
-    [[builtin(position)]] position: vec4<f32>;
-    [[location(0)]] uv: vec2<f32>;
-    [[location(1)]] layer: f32; // this should be an i32, but naga currently reads that as requiring interpolation.
+    @builtin(position) position: vec4<f32>,
+    @location(0) uv: vec2<f32>,
+    @location(1) layer: f32, // this should be an i32, but naga currently reads that as requiring interpolation.
 };
 
-[[stage(vertex)]]
+@vertex
 fn vs_main(input: VertexInput) -> VertexOutput {
     var out: VertexOutput;
 
@@ -40,7 +40,7 @@ fn vs_main(input: VertexInput) -> VertexOutput {
     return out;
 }
 
-[[stage(fragment)]]
-fn fs_main(input: VertexOutput) -> [[location(0)]] vec4<f32> {
+@fragment
+fn fs_main(input: VertexOutput) -> @location(0) vec4<f32> {
     return textureSample(u_texture, u_sampler, input.uv, i32(input.layer));
 }
diff --git a/wgpu/src/shader/quad.wgsl b/wgpu/src/shader/quad.wgsl
index 73f5d597..2e31cde3 100644
--- a/wgpu/src/shader/quad.wgsl
+++ b/wgpu/src/shader/quad.wgsl
@@ -1,31 +1,31 @@
 struct Globals {
-    transform: mat4x4<f32>;
-    scale: f32;
+    transform: mat4x4<f32>,
+    scale: f32,
 };
 
-[[group(0), binding(0)]] var<uniform> globals: Globals;
+@group(0) @binding(0) var<uniform> globals: Globals;
 
 struct VertexInput {
-    [[location(0)]] v_pos: vec2<f32>;
-    [[location(1)]] pos: vec2<f32>;
-    [[location(2)]] scale: vec2<f32>;
-    [[location(3)]] color: vec4<f32>;
-    [[location(4)]] border_color: vec4<f32>;
-    [[location(5)]] border_radius: f32;
-    [[location(6)]] border_width: f32;
+    @location(0) v_pos: vec2<f32>,
+    @location(1) pos: vec2<f32>,
+    @location(2) scale: vec2<f32>,
+    @location(3) color: vec4<f32>,
+    @location(4) border_color: vec4<f32>,
+    @location(5) border_radius: f32,
+    @location(6) border_width: f32,
 };
 
 struct VertexOutput {
-    [[builtin(position)]] position: vec4<f32>;
-    [[location(0)]] color: vec4<f32>;
-    [[location(1)]] border_color: vec4<f32>;
-    [[location(2)]] pos: vec2<f32>;
-    [[location(3)]] scale: vec2<f32>;
-    [[location(4)]] border_radius: f32;
-    [[location(5)]] border_width: f32;
+    @builtin(position) position: vec4<f32>,
+    @location(0) color: vec4<f32>,
+    @location(1) border_color: vec4<f32>,
+    @location(2) pos: vec2<f32>,
+    @location(3) scale: vec2<f32>,
+    @location(4) border_radius: f32,
+    @location(5) border_width: f32,
 };
 
-[[stage(vertex)]]
+@vertex
 fn vs_main(input: VertexInput) -> VertexOutput {
     var out: VertexOutput;
 
@@ -77,10 +77,10 @@ fn distance_alg(
 }
 
 
-[[stage(fragment)]]
+@fragment
 fn fs_main(
     input: VertexOutput
-) -> [[location(0)]] vec4<f32> {
+) -> @location(0) vec4<f32> {
     var mixed_color: vec4<f32> = input.color;
 
     if (input.border_width > 0.0) {
@@ -96,7 +96,7 @@ fn fs_main(
             internal_border
         );
 
-        var border_mix: f32 = smoothStep(
+        var border_mix: f32 = smoothstep(
             max(internal_border - 0.5, 0.0),
             internal_border + 0.5,
             internal_distance
@@ -112,7 +112,7 @@ fn fs_main(
         input.border_radius
     );
 
-    var radius_alpha: f32 = 1.0 - smoothStep(
+    var radius_alpha: f32 = 1.0 - smoothstep(
         max(input.border_radius - 0.5, 0.0),
         input.border_radius + 0.5,
         dist);
diff --git a/wgpu/src/shader/triangle.wgsl b/wgpu/src/shader/triangle.wgsl
index 61d9c5a4..4348cffd 100644
--- a/wgpu/src/shader/triangle.wgsl
+++ b/wgpu/src/shader/triangle.wgsl
@@ -1,20 +1,20 @@
 struct Globals {
-    transform: mat4x4<f32>;
+    transform: mat4x4<f32>,
 };
 
-[[group(0), binding(0)]] var<uniform> globals: Globals;
+@group(0) @binding(0) var<uniform> globals: Globals;
 
 struct VertexInput {
-    [[location(0)]] position: vec2<f32>;
-    [[location(1)]] color: vec4<f32>;
+    @location(0) position: vec2<f32>,
+    @location(1) color: vec4<f32>,
 };
 
 struct VertexOutput {
-    [[builtin(position)]] position: vec4<f32>;
-    [[location(0)]] color: vec4<f32>;
+    @builtin(position) position: vec4<f32>,
+    @location(0) color: vec4<f32>,
 };
 
-[[stage(vertex)]]
+@vertex
 fn vs_main(input: VertexInput) -> VertexOutput {
     var out: VertexOutput;
 
@@ -24,7 +24,7 @@ fn vs_main(input: VertexInput) -> VertexOutput {
     return out;
 }
 
-[[stage(fragment)]]
-fn fs_main(input: VertexOutput) -> [[location(0)]] vec4<f32> {
+@fragment
+fn fs_main(input: VertexOutput) -> @location(0) vec4<f32> {
     return input.color;
 }
diff --git a/wgpu/src/triangle.rs b/wgpu/src/triangle.rs
index bed64e99..40e2f855 100644
--- a/wgpu/src/triangle.rs
+++ b/wgpu/src/triangle.rs
@@ -132,7 +132,7 @@ impl Pipeline {
             });
 
         let shader =
-            device.create_shader_module(&wgpu::ShaderModuleDescriptor {
+            device.create_shader_module(wgpu::ShaderModuleDescriptor {
                 label: Some("iced_wgpu::triangle::shader"),
                 source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(
                     include_str!("shader/triangle.wgsl"),
@@ -160,11 +160,11 @@ impl Pipeline {
                 fragment: Some(wgpu::FragmentState {
                     module: &shader,
                     entry_point: "fs_main",
-                    targets: &[wgpu::ColorTargetState {
+                    targets: &[Some(wgpu::ColorTargetState {
                         format,
                         blend: Some(wgpu::BlendState::ALPHA_BLENDING),
                         write_mask: wgpu::ColorWrites::ALL,
-                    }],
+                    })],
                 }),
                 primitive: wgpu::PrimitiveState {
                     topology: wgpu::PrimitiveTopology::TriangleList,
@@ -350,11 +350,13 @@ impl Pipeline {
             let mut render_pass =
                 encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
                     label: Some("iced_wgpu::triangle render pass"),
-                    color_attachments: &[wgpu::RenderPassColorAttachment {
-                        view: attachment,
-                        resolve_target,
-                        ops: wgpu::Operations { load, store: true },
-                    }],
+                    color_attachments: &[Some(
+                        wgpu::RenderPassColorAttachment {
+                            view: attachment,
+                            resolve_target,
+                            ops: wgpu::Operations { load, store: true },
+                        },
+                    )],
                     depth_stencil_attachment: None,
                 });
 
diff --git a/wgpu/src/triangle/msaa.rs b/wgpu/src/triangle/msaa.rs
index 5d3ee311..7edeeb94 100644
--- a/wgpu/src/triangle/msaa.rs
+++ b/wgpu/src/triangle/msaa.rs
@@ -74,7 +74,7 @@ impl Blit {
             });
 
         let shader =
-            device.create_shader_module(&wgpu::ShaderModuleDescriptor {
+            device.create_shader_module(wgpu::ShaderModuleDescriptor {
                 label: Some("iced_wgpu::triangle::blit_shader"),
                 source: wgpu::ShaderSource::Wgsl(std::borrow::Cow::Borrowed(
                     include_str!("../shader/blit.wgsl"),
@@ -93,13 +93,13 @@ impl Blit {
                 fragment: Some(wgpu::FragmentState {
                     module: &shader,
                     entry_point: "fs_main",
-                    targets: &[wgpu::ColorTargetState {
+                    targets: &[Some(wgpu::ColorTargetState {
                         format,
                         blend: Some(
                             wgpu::BlendState::PREMULTIPLIED_ALPHA_BLENDING,
                         ),
                         write_mask: wgpu::ColorWrites::ALL,
-                    }],
+                    })],
                 }),
                 primitive: wgpu::PrimitiveState {
                     topology: wgpu::PrimitiveTopology::TriangleList,
@@ -169,14 +169,14 @@ impl Blit {
         let mut render_pass =
             encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
                 label: Some("iced_wgpu::triangle::msaa render pass"),
-                color_attachments: &[wgpu::RenderPassColorAttachment {
+                color_attachments: &[Some(wgpu::RenderPassColorAttachment {
                     view: target,
                     resolve_target: None,
                     ops: wgpu::Operations {
                         load: wgpu::LoadOp::Load,
                         store: true,
                     },
-                }],
+                })],
                 depth_stencil_attachment: None,
             });
 
diff --git a/wgpu/src/window/compositor.rs b/wgpu/src/window/compositor.rs
index dde5f09f..c064a86c 100644
--- a/wgpu/src/window/compositor.rs
+++ b/wgpu/src/window/compositor.rs
@@ -1,7 +1,6 @@
 use crate::{Backend, Color, Error, Renderer, Settings, Viewport};
 
 use futures::stream::{self, StreamExt};
-use futures::task::SpawnExt;
 
 use iced_graphics::compositor;
 use iced_native::futures;
@@ -16,7 +15,6 @@ pub struct Compositor {
     device: wgpu::Device,
     queue: wgpu::Queue,
     staging_belt: wgpu::util::StagingBelt,
-    local_pool: futures::executor::LocalPool,
     format: wgpu::TextureFormat,
 }
 
@@ -61,9 +59,14 @@ impl Compositor {
 
         log::info!("Selected: {:#?}", adapter.get_info());
 
-        let format = compatible_surface
-            .as_ref()
-            .and_then(|surface| surface.get_preferred_format(&adapter))?;
+        let format = compatible_surface.as_ref().and_then(|surface| {
+            let formats = surface.get_supported_formats(&adapter);
+            if formats.is_empty() {
+                None
+            } else {
+                Some(formats[0])
+            }
+        })?;
 
         log::info!("Selected format: {:?}", format);
 
@@ -98,7 +101,6 @@ impl Compositor {
             .await?;
 
         let staging_belt = wgpu::util::StagingBelt::new(Self::CHUNK_SIZE);
-        let local_pool = futures::executor::LocalPool::new();
 
         Some(Compositor {
             instance,
@@ -107,7 +109,6 @@ impl Compositor {
             device,
             queue,
             staging_belt,
-            local_pool,
             format,
         })
     }
@@ -200,24 +201,26 @@ impl iced_graphics::window::Compositor for Compositor {
                         label: Some(
                             "iced_wgpu::window::Compositor render pass",
                         ),
-                        color_attachments: &[wgpu::RenderPassColorAttachment {
-                            view,
-                            resolve_target: None,
-                            ops: wgpu::Operations {
-                                load: wgpu::LoadOp::Clear({
-                                    let [r, g, b, a] =
-                                        background_color.into_linear();
-
-                                    wgpu::Color {
-                                        r: f64::from(r),
-                                        g: f64::from(g),
-                                        b: f64::from(b),
-                                        a: f64::from(a),
-                                    }
-                                }),
-                                store: true,
+                        color_attachments: &[Some(
+                            wgpu::RenderPassColorAttachment {
+                                view,
+                                resolve_target: None,
+                                ops: wgpu::Operations {
+                                    load: wgpu::LoadOp::Clear({
+                                        let [r, g, b, a] =
+                                            background_color.into_linear();
+
+                                        wgpu::Color {
+                                            r: f64::from(r),
+                                            g: f64::from(g),
+                                            b: f64::from(b),
+                                            a: f64::from(a),
+                                        }
+                                    }),
+                                    store: true,
+                                },
                             },
-                        }],
+                        )],
                         depth_stencil_attachment: None,
                     });
 
@@ -235,16 +238,11 @@ impl iced_graphics::window::Compositor for Compositor {
 
                 // Submit work
                 self.staging_belt.finish();
-                self.queue.submit(Some(encoder.finish()));
+                let _idx = self.queue.submit(Some(encoder.finish()));
                 frame.present();
 
                 // Recall staging buffers
-                self.local_pool
-                    .spawner()
-                    .spawn(self.staging_belt.recall())
-                    .expect("Recall staging belt");
-
-                self.local_pool.run_until_stalled();
+                self.staging_belt.recall();
 
                 Ok(())
             }