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Merge pull request #2351 from iced-rs/custom-renderer-injection

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Type-Driven Renderer Fallback
This commit is contained in:
Héctor Ramón 2024-03-25 21:36:44 +01:00 • committed by GitHub
commit a2a8381a49
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GPG key ID: B5690EEEBB952194
56 changed files with 1994 additions and 1555 deletions
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1
wgpu/Cargo.toml
View file

@ -32,6 +32,7 @@ glyphon.workspace = true
guillotiere.workspace = true
log.workspace = true
once_cell.workspace = true
thiserror.workspace = true
wgpu.workspace = true
lyon.workspace = true

13
wgpu/src/backend.rs
View file

@ -7,6 +7,7 @@ use crate::primitive::{self, Primitive};
use crate::quad;
use crate::text;
use crate::triangle;
use crate::window;
use crate::{Layer, Settings};
#[cfg(feature = "tracing")]
@ -371,8 +372,9 @@ impl Backend {
}
}
impl crate::graphics::Backend for Backend {
impl backend::Backend for Backend {
type Primitive = primitive::Custom;
type Compositor = window::Compositor;
}
impl backend::Text for Backend {
@ -397,3 +399,12 @@ impl backend::Svg for Backend {
self.image_pipeline.viewport_dimensions(handle)
}
}
#[cfg(feature = "geometry")]
impl crate::graphics::geometry::Backend for Backend {
type Frame = crate::geometry::Frame;
fn new_frame(&self, size: Size) -> Self::Frame {
crate::geometry::Frame::new(size)
}
}

702
wgpu/src/geometry.rs
View file

@ -6,7 +6,7 @@ use crate::core::{
use crate::graphics::color;
use crate::graphics::geometry::fill::{self, Fill};
use crate::graphics::geometry::{
LineCap, LineDash, LineJoin, Path, Stroke, Style, Text,
self, LineCap, LineDash, LineJoin, Path, Stroke, Style, Text,
};
use crate::graphics::gradient::{self, Gradient};
use crate::graphics::mesh::{self, Mesh};
@ -14,6 +14,7 @@ use crate::primitive::{self, Primitive};
use lyon::geom::euclid;
use lyon::tessellation;
use std::borrow::Cow;
/// A frame for drawing some geometry.
@ -27,6 +28,325 @@ pub struct Frame {
stroke_tessellator: tessellation::StrokeTessellator,
}
impl Frame {
/// Creates a new [`Frame`] with the given [`Size`].
pub fn new(size: Size) -> Frame {
Frame {
size,
buffers: BufferStack::new(),
primitives: Vec::new(),
transforms: Transforms {
previous: Vec::new(),
current: Transform(lyon::math::Transform::identity()),
},
fill_tessellator: tessellation::FillTessellator::new(),
stroke_tessellator: tessellation::StrokeTessellator::new(),
}
}
fn into_primitives(mut self) -> Vec<Primitive> {
for buffer in self.buffers.stack {
match buffer {
Buffer::Solid(buffer) => {
if !buffer.indices.is_empty() {
self.primitives.push(Primitive::Custom(
primitive::Custom::Mesh(Mesh::Solid {
buffers: mesh::Indexed {
vertices: buffer.vertices,
indices: buffer.indices,
},
size: self.size,
}),
));
}
}
Buffer::Gradient(buffer) => {
if !buffer.indices.is_empty() {
self.primitives.push(Primitive::Custom(
primitive::Custom::Mesh(Mesh::Gradient {
buffers: mesh::Indexed {
vertices: buffer.vertices,
indices: buffer.indices,
},
size: self.size,
}),
));
}
}
}
}
self.primitives
}
}
impl geometry::frame::Backend for Frame {
type Geometry = Primitive;
/// Creates a new empty [`Frame`] with the given dimensions.
///
/// The default coordinate system of a [`Frame`] has its origin at the
/// top-left corner of its bounds.
#[inline]
fn width(&self) -> f32 {
self.size.width
}
#[inline]
fn height(&self) -> f32 {
self.size.height
}
#[inline]
fn size(&self) -> Size {
self.size
}
#[inline]
fn center(&self) -> Point {
Point::new(self.size.width / 2.0, self.size.height / 2.0)
}
fn fill(&mut self, path: &Path, fill: impl Into<Fill>) {
let Fill { style, rule } = fill.into();
let mut buffer = self
.buffers
.get_fill(&self.transforms.current.transform_style(style));
let options = tessellation::FillOptions::default()
.with_fill_rule(into_fill_rule(rule));
if self.transforms.current.is_identity() {
self.fill_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
} else {
let path = path.transform(&self.transforms.current.0);
self.fill_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
}
.expect("Tessellate path.");
}
fn fill_rectangle(
&mut self,
top_left: Point,
size: Size,
fill: impl Into<Fill>,
) {
let Fill { style, rule } = fill.into();
let mut buffer = self
.buffers
.get_fill(&self.transforms.current.transform_style(style));
let top_left = self
.transforms
.current
.0
.transform_point(lyon::math::Point::new(top_left.x, top_left.y));
let size =
self.transforms.current.0.transform_vector(
lyon::math::Vector::new(size.width, size.height),
);
let options = tessellation::FillOptions::default()
.with_fill_rule(into_fill_rule(rule));
self.fill_tessellator
.tessellate_rectangle(
&lyon::math::Box2D::new(top_left, top_left + size),
&options,
buffer.as_mut(),
)
.expect("Fill rectangle");
}
fn stroke<'a>(&mut self, path: &Path, stroke: impl Into<Stroke<'a>>) {
let stroke = stroke.into();
let mut buffer = self
.buffers
.get_stroke(&self.transforms.current.transform_style(stroke.style));
let mut options = tessellation::StrokeOptions::default();
options.line_width = stroke.width;
options.start_cap = into_line_cap(stroke.line_cap);
options.end_cap = into_line_cap(stroke.line_cap);
options.line_join = into_line_join(stroke.line_join);
let path = if stroke.line_dash.segments.is_empty() {
Cow::Borrowed(path)
} else {
Cow::Owned(dashed(path, stroke.line_dash))
};
if self.transforms.current.is_identity() {
self.stroke_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
} else {
let path = path.transform(&self.transforms.current.0);
self.stroke_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
}
.expect("Stroke path");
}
fn fill_text(&mut self, text: impl Into<Text>) {
let text = text.into();
let (scale_x, scale_y) = self.transforms.current.scale();
if self.transforms.current.is_scale_translation()
&& scale_x == scale_y
&& scale_x > 0.0
&& scale_y > 0.0
{
let (position, size, line_height) =
if self.transforms.current.is_identity() {
(text.position, text.size, text.line_height)
} else {
let position =
self.transforms.current.transform_point(text.position);
let size = Pixels(text.size.0 * scale_y);
let line_height = match text.line_height {
LineHeight::Absolute(size) => {
LineHeight::Absolute(Pixels(size.0 * scale_y))
}
LineHeight::Relative(factor) => {
LineHeight::Relative(factor)
}
};
(position, size, line_height)
};
let bounds = Rectangle {
x: position.x,
y: position.y,
width: f32::INFINITY,
height: f32::INFINITY,
};
// TODO: Honor layering!
self.primitives.push(Primitive::Text {
content: text.content,
bounds,
color: text.color,
size,
line_height,
font: text.font,
horizontal_alignment: text.horizontal_alignment,
vertical_alignment: text.vertical_alignment,
shaping: text.shaping,
clip_bounds: Rectangle::with_size(Size::INFINITY),
});
} else {
text.draw_with(|path, color| self.fill(&path, color));
}
}
#[inline]
fn translate(&mut self, translation: Vector) {
self.transforms.current.0 =
self.transforms
.current
.0
.pre_translate(lyon::math::Vector::new(
translation.x,
translation.y,
));
}
#[inline]
fn rotate(&mut self, angle: impl Into<Radians>) {
self.transforms.current.0 = self
.transforms
.current
.0
.pre_rotate(lyon::math::Angle::radians(angle.into().0));
}
#[inline]
fn scale(&mut self, scale: impl Into<f32>) {
let scale = scale.into();
self.scale_nonuniform(Vector { x: scale, y: scale });
}
#[inline]
fn scale_nonuniform(&mut self, scale: impl Into<Vector>) {
let scale = scale.into();
self.transforms.current.0 =
self.transforms.current.0.pre_scale(scale.x, scale.y);
}
fn push_transform(&mut self) {
self.transforms.previous.push(self.transforms.current);
}
fn pop_transform(&mut self) {
self.transforms.current = self.transforms.previous.pop().unwrap();
}
fn draft(&mut self, size: Size) -> Frame {
Frame::new(size)
}
fn paste(&mut self, frame: Frame, at: Point) {
let size = frame.size();
let primitives = frame.into_primitives();
let transformation = Transformation::translate(at.x, at.y);
let (text, meshes) = primitives
.into_iter()
.partition(|primitive| matches!(primitive, Primitive::Text { .. }));
self.primitives.push(Primitive::Group {
primitives: vec![
Primitive::Transform {
transformation,
content: Box::new(Primitive::Group { primitives: meshes }),
},
Primitive::Transform {
transformation,
content: Box::new(Primitive::Clip {
bounds: Rectangle::with_size(size),
content: Box::new(Primitive::Group {
primitives: text,
}),
}),
},
],
});
}
fn into_geometry(self) -> Self::Geometry {
Primitive::Group {
primitives: self.into_primitives(),
}
}
}
enum Buffer {
Solid(tessellation::VertexBuffers<mesh::SolidVertex2D, u32>),
Gradient(tessellation::VertexBuffers<mesh::GradientVertex2D, u32>),
@ -165,386 +485,6 @@ impl Transform {
gradient
}
}
impl Frame {
/// Creates a new empty [`Frame`] with the given dimensions.
///
/// The default coordinate system of a [`Frame`] has its origin at the
/// top-left corner of its bounds.
pub fn new(size: Size) -> Frame {
Frame {
size,
buffers: BufferStack::new(),
primitives: Vec::new(),
transforms: Transforms {
previous: Vec::new(),
current: Transform(lyon::math::Transform::identity()),
},
fill_tessellator: tessellation::FillTessellator::new(),
stroke_tessellator: tessellation::StrokeTessellator::new(),
}
}
/// Returns the width of the [`Frame`].
#[inline]
pub fn width(&self) -> f32 {
self.size.width
}
/// Returns the height of the [`Frame`].
#[inline]
pub fn height(&self) -> f32 {
self.size.height
}
/// Returns the dimensions of the [`Frame`].
#[inline]
pub fn size(&self) -> Size {
self.size
}
/// Returns the coordinate of the center of the [`Frame`].
#[inline]
pub fn center(&self) -> Point {
Point::new(self.size.width / 2.0, self.size.height / 2.0)
}
/// Draws the given [`Path`] on the [`Frame`] by filling it with the
/// provided style.
pub fn fill(&mut self, path: &Path, fill: impl Into<Fill>) {
let Fill { style, rule } = fill.into();
let mut buffer = self
.buffers
.get_fill(&self.transforms.current.transform_style(style));
let options = tessellation::FillOptions::default()
.with_fill_rule(into_fill_rule(rule));
if self.transforms.current.is_identity() {
self.fill_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
} else {
let path = path.transform(&self.transforms.current.0);
self.fill_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
}
.expect("Tessellate path.");
}
/// Draws an axis-aligned rectangle given its top-left corner coordinate and
/// its `Size` on the [`Frame`] by filling it with the provided style.
pub fn fill_rectangle(
&mut self,
top_left: Point,
size: Size,
fill: impl Into<Fill>,
) {
let Fill { style, rule } = fill.into();
let mut buffer = self
.buffers
.get_fill(&self.transforms.current.transform_style(style));
let top_left = self
.transforms
.current
.0
.transform_point(lyon::math::Point::new(top_left.x, top_left.y));
let size =
self.transforms.current.0.transform_vector(
lyon::math::Vector::new(size.width, size.height),
);
let options = tessellation::FillOptions::default()
.with_fill_rule(into_fill_rule(rule));
self.fill_tessellator
.tessellate_rectangle(
&lyon::math::Box2D::new(top_left, top_left + size),
&options,
buffer.as_mut(),
)
.expect("Fill rectangle");
}
/// Draws the stroke of the given [`Path`] on the [`Frame`] with the
/// provided style.
pub fn stroke<'a>(&mut self, path: &Path, stroke: impl Into<Stroke<'a>>) {
let stroke = stroke.into();
let mut buffer = self
.buffers
.get_stroke(&self.transforms.current.transform_style(stroke.style));
let mut options = tessellation::StrokeOptions::default();
options.line_width = stroke.width;
options.start_cap = into_line_cap(stroke.line_cap);
options.end_cap = into_line_cap(stroke.line_cap);
options.line_join = into_line_join(stroke.line_join);
let path = if stroke.line_dash.segments.is_empty() {
Cow::Borrowed(path)
} else {
Cow::Owned(dashed(path, stroke.line_dash))
};
if self.transforms.current.is_identity() {
self.stroke_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
} else {
let path = path.transform(&self.transforms.current.0);
self.stroke_tessellator.tessellate_path(
path.raw(),
&options,
buffer.as_mut(),
)
}
.expect("Stroke path");
}
/// Draws the characters of the given [`Text`] on the [`Frame`], filling
/// them with the given color.
///
/// __Warning:__ Text currently does not work well with rotations and scale
/// transforms! The position will be correctly transformed, but the
/// resulting glyphs will not be rotated or scaled properly.
///
/// Additionally, all text will be rendered on top of all the layers of
/// a `Canvas`. Therefore, it is currently only meant to be used for
/// overlays, which is the most common use case.
///
/// Support for vectorial text is planned, and should address all these
/// limitations.
pub fn fill_text(&mut self, text: impl Into<Text>) {
let text = text.into();
let (scale_x, scale_y) = self.transforms.current.scale();
if self.transforms.current.is_scale_translation()
&& scale_x == scale_y
&& scale_x > 0.0
&& scale_y > 0.0
{
let (position, size, line_height) =
if self.transforms.current.is_identity() {
(text.position, text.size, text.line_height)
} else {
let position =
self.transforms.current.transform_point(text.position);
let size = Pixels(text.size.0 * scale_y);
let line_height = match text.line_height {
LineHeight::Absolute(size) => {
LineHeight::Absolute(Pixels(size.0 * scale_y))
}
LineHeight::Relative(factor) => {
LineHeight::Relative(factor)
}
};
(position, size, line_height)
};
let bounds = Rectangle {
x: position.x,
y: position.y,
width: f32::INFINITY,
height: f32::INFINITY,
};
// TODO: Honor layering!
self.primitives.push(Primitive::Text {
content: text.content,
bounds,
color: text.color,
size,
line_height,
font: text.font,
horizontal_alignment: text.horizontal_alignment,
vertical_alignment: text.vertical_alignment,
shaping: text.shaping,
clip_bounds: Rectangle::with_size(Size::INFINITY),
});
} else {
text.draw_with(|path, color| self.fill(&path, color));
}
}
/// Stores the current transform of the [`Frame`] and executes the given
/// drawing operations, restoring the transform afterwards.
///
/// This method is useful to compose transforms and perform drawing
/// operations in different coordinate systems.
#[inline]
pub fn with_save<R>(&mut self, f: impl FnOnce(&mut Frame) -> R) -> R {
self.push_transform();
let result = f(self);
self.pop_transform();
result
}
/// Pushes the current transform in the transform stack.
pub fn push_transform(&mut self) {
self.transforms.previous.push(self.transforms.current);
}
/// Pops a transform from the transform stack and sets it as the current transform.
pub fn pop_transform(&mut self) {
self.transforms.current = self.transforms.previous.pop().unwrap();
}
/// Executes the given drawing operations within a [`Rectangle`] region,
/// clipping any geometry that overflows its bounds. Any transformations
/// performed are local to the provided closure.
///
/// This method is useful to perform drawing operations that need to be
/// clipped.
#[inline]
pub fn with_clip<R>(
&mut self,
region: Rectangle,
f: impl FnOnce(&mut Frame) -> R,
) -> R {
let mut frame = Frame::new(region.size());
let result = f(&mut frame);
let origin = Point::new(region.x, region.y);
self.clip(frame, origin);
result
}
/// Draws the clipped contents of the given [`Frame`] with origin at the given [`Point`].
pub fn clip(&mut self, frame: Frame, at: Point) {
let size = frame.size();
let primitives = frame.into_primitives();
let transformation = Transformation::translate(at.x, at.y);
let (text, meshes) = primitives
.into_iter()
.partition(|primitive| matches!(primitive, Primitive::Text { .. }));
self.primitives.push(Primitive::Group {
primitives: vec![
Primitive::Transform {
transformation,
content: Box::new(Primitive::Group { primitives: meshes }),
},
Primitive::Transform {
transformation,
content: Box::new(Primitive::Clip {
bounds: Rectangle::with_size(size),
content: Box::new(Primitive::Group {
primitives: text,
}),
}),
},
],
});
}
/// Applies a translation to the current transform of the [`Frame`].
#[inline]
pub fn translate(&mut self, translation: Vector) {
self.transforms.current.0 =
self.transforms
.current
.0
.pre_translate(lyon::math::Vector::new(
translation.x,
translation.y,
));
}
/// Applies a rotation in radians to the current transform of the [`Frame`].
#[inline]
pub fn rotate(&mut self, angle: impl Into<Radians>) {
self.transforms.current.0 = self
.transforms
.current
.0
.pre_rotate(lyon::math::Angle::radians(angle.into().0));
}
/// Applies a uniform scaling to the current transform of the [`Frame`].
#[inline]
pub fn scale(&mut self, scale: impl Into<f32>) {
let scale = scale.into();
self.scale_nonuniform(Vector { x: scale, y: scale });
}
/// Applies a non-uniform scaling to the current transform of the [`Frame`].
#[inline]
pub fn scale_nonuniform(&mut self, scale: impl Into<Vector>) {
let scale = scale.into();
self.transforms.current.0 =
self.transforms.current.0.pre_scale(scale.x, scale.y);
}
/// Produces the [`Primitive`] representing everything drawn on the [`Frame`].
pub fn into_primitive(self) -> Primitive {
Primitive::Group {
primitives: self.into_primitives(),
}
}
fn into_primitives(mut self) -> Vec<Primitive> {
for buffer in self.buffers.stack {
match buffer {
Buffer::Solid(buffer) => {
if !buffer.indices.is_empty() {
self.primitives.push(Primitive::Custom(
primitive::Custom::Mesh(Mesh::Solid {
buffers: mesh::Indexed {
vertices: buffer.vertices,
indices: buffer.indices,
},
size: self.size,
}),
));
}
}
Buffer::Gradient(buffer) => {
if !buffer.indices.is_empty() {
self.primitives.push(Primitive::Custom(
primitive::Custom::Mesh(Mesh::Gradient {
buffers: mesh::Indexed {
vertices: buffer.vertices,
indices: buffer.indices,
},
size: self.size,
}),
));
}
}
}
}
self.primitives
}
}
struct GradientVertex2DBuilder {
gradient: gradient::Packed,
}

8
wgpu/src/primitive.rs
View file

@ -28,3 +28,11 @@ impl Damage for Custom {
}
}
}
impl TryFrom<Mesh> for Custom {
type Error = &'static str;
fn try_from(mesh: Mesh) -> Result<Self, Self::Error> {
Ok(Custom::Mesh(mesh))
}
}

4
wgpu/src/primitive/pipeline.rs
View file

@ -1,5 +1,5 @@
//! Draw primitives using custom pipelines.
use crate::core::{Rectangle, Size};
use crate::core::{self, Rectangle, Size};
use std::any::{Any, TypeId};
use std::collections::HashMap;
@ -58,7 +58,7 @@ pub trait Primitive: Debug + Send + Sync + 'static {
}
/// A renderer than can draw custom pipeline primitives.
pub trait Renderer: crate::core::Renderer {
pub trait Renderer: core::Renderer {
/// Draws a custom pipeline primitive.
fn draw_pipeline_primitive(
&mut self,

37
wgpu/src/settings.rs
View file

@ -1,6 +1,6 @@
//! Configure a renderer.
use crate::core::{Font, Pixels};
use crate::graphics::Antialiasing;
use crate::graphics::{self, Antialiasing};
/// The settings of a [`Backend`].
///
@ -29,30 +29,6 @@ pub struct Settings {
pub antialiasing: Option<Antialiasing>,
}
impl Settings {
/// Creates new [`Settings`] using environment configuration.
///
/// Specifically:
///
/// - The `internal_backend` can be configured using the `WGPU_BACKEND`
/// environment variable. If the variable is not set, the primary backend
/// will be used. The following values are allowed:
/// - `vulkan`
/// - `metal`
/// - `dx12`
/// - `dx11`
/// - `gl`
/// - `webgpu`
/// - `primary`
pub fn from_env() -> Self {
Settings {
internal_backend: wgpu::util::backend_bits_from_env()
.unwrap_or(wgpu::Backends::all()),
..Self::default()
}
}
}
impl Default for Settings {
fn default() -> Settings {
Settings {
@ -64,3 +40,14 @@ impl Default for Settings {
}
}
}
impl From<graphics::Settings> for Settings {
fn from(settings: graphics::Settings) -> Self {
Self {
default_font: settings.default_font,
default_text_size: settings.default_text_size,
antialiasing: settings.antialiasing,
..Settings::default()
}
}
}

142
wgpu/src/window/compositor.rs
View file

@ -1,13 +1,11 @@
//! Connect a window with a renderer.
use crate::core::{Color, Size};
use crate::graphics;
use crate::graphics::color;
use crate::graphics::compositor;
use crate::graphics::{Error, Viewport};
use crate::graphics::error;
use crate::graphics::{self, Viewport};
use crate::{Backend, Primitive, Renderer, Settings};
use std::future::Future;
/// A window graphics backend for iced powered by `wgpu`.
#[allow(missing_debug_implementations)]
pub struct Compositor {
@ -20,6 +18,32 @@ pub struct Compositor {
alpha_mode: wgpu::CompositeAlphaMode,
}
/// A compositor error.
#[derive(Debug, Clone, thiserror::Error)]
pub enum Error {
/// The surface creation failed.
#[error("the surface creation failed: {0}")]
SurfaceCreationFailed(#[from] wgpu::CreateSurfaceError),
/// The surface is not compatible.
#[error("the surface is not compatible")]
IncompatibleSurface,
/// No adapter was found for the options requested.
#[error("no adapter was found for the options requested: {0:?}")]
NoAdapterFound(String),
/// No device request succeeded.
#[error("no device request succeeded: {0:?}")]
RequestDeviceFailed(Vec<(wgpu::Limits, wgpu::RequestDeviceError)>),
}
impl From<Error> for graphics::Error {
fn from(error: Error) -> Self {
Self::GraphicsAdapterNotFound {
backend: "wgpu",
reason: error::Reason::RequestFailed(error.to_string()),
}
}
}
impl Compositor {
/// Requests a new [`Compositor`] with the given [`Settings`].
///
@ -27,7 +51,7 @@ impl Compositor {
pub async fn request<W: compositor::Window>(
settings: Settings,
compatible_window: Option<W>,
) -> Option<Self> {
) -> Result<Self, Error> {
let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
backends: settings.internal_backend,
..Default::default()
@ -49,23 +73,27 @@ impl Compositor {
let compatible_surface = compatible_window
.and_then(|window| instance.create_surface(window).ok());
let adapter_options = wgpu::RequestAdapterOptions {
power_preference: wgpu::util::power_preference_from_env()
.unwrap_or(if settings.antialiasing.is_none() {
wgpu::PowerPreference::LowPower
} else {
wgpu::PowerPreference::HighPerformance
}),
compatible_surface: compatible_surface.as_ref(),
force_fallback_adapter: false,
};
let adapter = instance
.request_adapter(&wgpu::RequestAdapterOptions {
power_preference: wgpu::util::power_preference_from_env()
.unwrap_or(if settings.antialiasing.is_none() {
wgpu::PowerPreference::LowPower
} else {
wgpu::PowerPreference::HighPerformance
}),
compatible_surface: compatible_surface.as_ref(),
force_fallback_adapter: false,
})
.await?;
.request_adapter(&adapter_options)
.await
.ok_or(Error::NoAdapterFound(format!("{:?}", adapter_options)))?;
log::info!("Selected: {:#?}", adapter.get_info());
let (format, alpha_mode) =
compatible_surface.as_ref().and_then(|surface| {
let (format, alpha_mode) = compatible_surface
.as_ref()
.and_then(|surface| {
let capabilities = surface.get_capabilities(&adapter);
let mut formats = capabilities.formats.iter().copied();
@ -101,7 +129,8 @@ impl Compositor {
};
format.zip(Some(preferred_alpha))
})?;
})
.ok_or(Error::IncompatibleSurface)?;
log::info!(
"Selected format: {format:?} with alpha mode: {alpha_mode:?}"
@ -115,39 +144,46 @@ impl Compositor {
let limits =
[wgpu::Limits::default(), wgpu::Limits::downlevel_defaults()];
let mut limits = limits.into_iter().map(|limits| wgpu::Limits {
let limits = limits.into_iter().map(|limits| wgpu::Limits {
max_bind_groups: 2,
..limits
});
let (device, queue) =
loop {
let required_limits = limits.next()?;
let device = adapter.request_device(
let mut errors = Vec::new();
for required_limits in limits {
let result = adapter
.request_device(
&wgpu::DeviceDescriptor {
label: Some(
"iced_wgpu::window::compositor device descriptor",
),
required_features: wgpu::Features::empty(),
required_limits,
required_limits: required_limits.clone(),
},
None,
).await.ok();
)
.await;
if let Some(device) = device {
break Some(device);
match result {
Ok((device, queue)) => {
return Ok(Compositor {
instance,
settings,
adapter,
device,
queue,
format,
alpha_mode,
})
}
}?;
Err(error) => {
errors.push((required_limits, error));
}
}
}
Some(Compositor {
instance,
settings,
adapter,
device,
queue,
format,
alpha_mode,
})
Err(Error::RequestDeviceFailed(errors))
}
/// Creates a new rendering [`Backend`] for this [`Compositor`].
@ -168,9 +204,7 @@ pub async fn new<W: compositor::Window>(
settings: Settings,
compatible_window: W,
) -> Result<Compositor, Error> {
Compositor::request(settings, Some(compatible_window))
.await
.ok_or(Error::GraphicsAdapterNotFound)
Compositor::request(settings, Some(compatible_window)).await
}
/// Presents the given primitives with the given [`Compositor`] and [`Backend`].
@ -229,15 +263,31 @@ pub fn present<T: AsRef<str>>(
}
impl graphics::Compositor for Compositor {
type Settings = Settings;
type Renderer = Renderer;
type Surface = wgpu::Surface<'static>;
fn new<W: compositor::Window>(
settings: Self::Settings,
async fn with_backend<W: compositor::Window>(
settings: graphics::Settings,
compatible_window: W,
) -> impl Future<Output = Result<Self, Error>> {
new(settings, compatible_window)
backend: Option<&str>,
) -> Result<Self, graphics::Error> {
match backend {
None | Some("wgpu") => Ok(new(
Settings {
internal_backend: wgpu::util::backend_bits_from_env()
.unwrap_or(wgpu::Backends::all()),
..settings.into()
},
compatible_window,
)
.await?),
Some(backend) => Err(graphics::Error::GraphicsAdapterNotFound {
backend: "wgpu",
reason: error::Reason::DidNotMatch {
preferred_backend: backend.to_owned(),
},
}),
}
}
fn create_renderer(&self) -> Self::Renderer {