diff options
Diffstat (limited to 'wgpu')
26 files changed, 1497 insertions, 108 deletions
diff --git a/wgpu/Cargo.toml b/wgpu/Cargo.toml index 60b98b40..887c2d21 100644 --- a/wgpu/Cargo.toml +++ b/wgpu/Cargo.toml @@ -9,6 +9,7 @@ repository = "https://github.com/hecrj/iced" [features] svg = ["resvg"] +canvas = ["lyon"] [dependencies] iced_native = { version = "0.1.0", path = "../native" } @@ -20,5 +21,16 @@ raw-window-handle = "0.3" glam = "0.8" font-kit = "0.4" log = "0.4" -resvg = { version = "0.8", features = ["raqote-backend"], optional = true } -image = { version = "0.22", optional = true } + +[dependencies.image] +version = "0.22" +optional = true + +[dependencies.resvg] +version = "0.8" +features = ["raqote-backend"] +optional = true + +[dependencies.lyon] +version = "0.15" +optional = true diff --git a/wgpu/src/lib.rs b/wgpu/src/lib.rs index e4834818..4f2b732d 100644 --- a/wgpu/src/lib.rs +++ b/wgpu/src/lib.rs @@ -25,6 +25,7 @@ #![forbid(unsafe_code)] #![forbid(rust_2018_idioms)] pub mod defaults; +pub mod settings; pub mod triangle; pub mod widget; pub mod window; @@ -33,7 +34,6 @@ mod image; mod primitive; mod quad; mod renderer; -mod settings; mod target; mod text; mod transformation; diff --git a/wgpu/src/primitive.rs b/wgpu/src/primitive.rs index 481252ef..823b4b72 100644 --- a/wgpu/src/primitive.rs +++ b/wgpu/src/primitive.rs @@ -1,5 +1,5 @@ use iced_native::{ - image, svg, Background, Color, Font, HorizontalAlignment, Rectangle, + image, svg, Background, Color, Font, HorizontalAlignment, Point, Rectangle, Vector, VerticalAlignment, }; @@ -73,7 +73,13 @@ pub enum Primitive { /// A low-level primitive to render a mesh of triangles. /// /// It can be used to render many kinds of geometry freely. - Mesh2D(Arc<triangle::Mesh2D>), + Mesh2D { + /// The top-left coordinate of the mesh + origin: Point, + + /// The vertex and index buffers of the mesh + buffers: Arc<triangle::Mesh2D>, + }, } impl Default for Primitive { diff --git a/wgpu/src/renderer.rs b/wgpu/src/renderer.rs index e93090b8..29adcfb6 100644 --- a/wgpu/src/renderer.rs +++ b/wgpu/src/renderer.rs @@ -26,7 +26,7 @@ struct Layer<'a> { offset: Vector<u32>, quads: Vec<Quad>, images: Vec<Image>, - meshes: Vec<Arc<triangle::Mesh2D>>, + meshes: Vec<(Point, Arc<triangle::Mesh2D>)>, text: Vec<wgpu_glyph::Section<'a>>, } @@ -51,7 +51,8 @@ impl Renderer { let text_pipeline = text::Pipeline::new(device, settings.default_font); let quad_pipeline = quad::Pipeline::new(device); let image_pipeline = crate::image::Pipeline::new(device); - let triangle_pipeline = triangle::Pipeline::new(device); + let triangle_pipeline = + triangle::Pipeline::new(device, settings.antialiasing); Self { quad_pipeline, @@ -105,6 +106,8 @@ impl Renderer { &layer, encoder, target.texture, + width, + height, ); } @@ -229,8 +232,8 @@ impl Renderer { scale: [bounds.width, bounds.height], }); } - Primitive::Mesh2D(mesh) => { - layer.meshes.push(mesh.clone()); + Primitive::Mesh2D { origin, buffers } => { + layer.meshes.push((*origin, buffers.clone())); } Primitive::Clip { bounds, @@ -308,22 +311,26 @@ impl Renderer { layer: &Layer<'_>, encoder: &mut wgpu::CommandEncoder, target: &wgpu::TextureView, + target_width: u32, + target_height: u32, ) { let bounds = layer.bounds * scale_factor; if layer.meshes.len() > 0 { let translated = transformation + * Transformation::scale(scale_factor, scale_factor) * Transformation::translate( - -(layer.offset.x as f32) * scale_factor, - -(layer.offset.y as f32) * scale_factor, + -(layer.offset.x as f32), + -(layer.offset.y as f32), ); self.triangle_pipeline.draw( device, encoder, target, + target_width, + target_height, translated, - scale_factor, &layer.meshes, bounds, ); diff --git a/wgpu/src/settings.rs b/wgpu/src/settings.rs index dbe81830..65853ce2 100644 --- a/wgpu/src/settings.rs +++ b/wgpu/src/settings.rs @@ -1,10 +1,41 @@ +//! Configure a [`Renderer`]. +//! +//! [`Renderer`]: struct.Renderer.html + /// The settings of a [`Renderer`]. /// -/// [`Renderer`]: struct.Renderer.html +/// [`Renderer`]: ../struct.Renderer.html #[derive(Debug, Clone, Copy, PartialEq, Eq, Default)] pub struct Settings { /// The bytes of the font that will be used by default. /// /// If `None` is provided, a default system font will be chosen. pub default_font: Option<&'static [u8]>, + + /// The antialiasing strategy that will be used for triangle primitives. + pub antialiasing: Option<Antialiasing>, +} + +/// An antialiasing strategy. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum Antialiasing { + /// Multisample AA with 2 samples + MSAAx2, + /// Multisample AA with 4 samples + MSAAx4, + /// Multisample AA with 8 samples + MSAAx8, + /// Multisample AA with 16 samples + MSAAx16, +} + +impl Antialiasing { + pub(crate) fn sample_count(&self) -> u32 { + match self { + Antialiasing::MSAAx2 => 2, + Antialiasing::MSAAx4 => 4, + Antialiasing::MSAAx8 => 8, + Antialiasing::MSAAx16 => 16, + } + } } diff --git a/wgpu/src/shader/blit.frag b/wgpu/src/shader/blit.frag new file mode 100644 index 00000000..dfed960f --- /dev/null +++ b/wgpu/src/shader/blit.frag @@ -0,0 +1,12 @@ +#version 450 + +layout(location = 0) in vec2 v_Uv; + +layout(set = 0, binding = 0) uniform sampler u_Sampler; +layout(set = 1, binding = 0) uniform texture2D u_Texture; + +layout(location = 0) out vec4 o_Color; + +void main() { + o_Color = texture(sampler2D(u_Texture, u_Sampler), v_Uv); +} diff --git a/wgpu/src/shader/blit.frag.spv b/wgpu/src/shader/blit.frag.spv Binary files differnew file mode 100644 index 00000000..2c5638b5 --- /dev/null +++ b/wgpu/src/shader/blit.frag.spv diff --git a/wgpu/src/shader/blit.vert b/wgpu/src/shader/blit.vert new file mode 100644 index 00000000..1c081b9e --- /dev/null +++ b/wgpu/src/shader/blit.vert @@ -0,0 +1,26 @@ +#version 450 + +layout(location = 0) out vec2 o_Uv; + +const vec2 positions[6] = vec2[6]( + vec2(-1.0, -1.0), + vec2(-1.0, 1.0), + vec2(1.0, 1.0), + vec2(-1.0, -1.0), + vec2(1.0, -1.0), + vec2(1.0, 1.0) +); + +const vec2 uvs[6] = vec2[6]( + vec2(0.0, 0.0), + vec2(0.0, 1.0), + vec2(1.0, 1.0), + vec2(0.0, 0.0), + vec2(1.0, 0.0), + vec2(1.0, 1.0) +); + +void main() { + o_Uv = uvs[gl_VertexIndex]; + gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0); +} diff --git a/wgpu/src/shader/blit.vert.spv b/wgpu/src/shader/blit.vert.spv Binary files differnew file mode 100644 index 00000000..ad697d48 --- /dev/null +++ b/wgpu/src/shader/blit.vert.spv diff --git a/wgpu/src/shader/image.vert b/wgpu/src/shader/image.vert deleted file mode 100644 index 688c2311..00000000 --- a/wgpu/src/shader/image.vert +++ /dev/null @@ -1,24 +0,0 @@ -#version 450 - -layout(location = 0) in vec2 v_Pos; -layout(location = 1) in vec2 i_Pos; -layout(location = 2) in vec2 i_Scale; - -layout (set = 0, binding = 0) uniform Globals { - mat4 u_Transform; -}; - -layout(location = 0) out vec2 o_Uv; - -void main() { - o_Uv = v_Pos; - - mat4 i_Transform = mat4( - vec4(i_Scale.x, 0.0, 0.0, 0.0), - vec4(0.0, i_Scale.y, 0.0, 0.0), - vec4(0.0, 0.0, 1.0, 0.0), - vec4(i_Pos, 0.0, 1.0) - ); - - gl_Position = u_Transform * i_Transform * vec4(v_Pos, 0.0, 1.0); -} diff --git a/wgpu/src/shader/triangle.vert b/wgpu/src/shader/triangle.vert index fd86ecd6..1f2c009b 100644 --- a/wgpu/src/shader/triangle.vert +++ b/wgpu/src/shader/triangle.vert @@ -7,11 +7,9 @@ layout(location = 0) out vec4 o_Color; layout (set = 0, binding = 0) uniform Globals { mat4 u_Transform; - float u_Scale; }; void main() { - vec2 p_Position = i_Position * u_Scale; - gl_Position = u_Transform * vec4(p_Position, 0.0, 1.0); + gl_Position = u_Transform * vec4(i_Position, 0.0, 1.0); o_Color = i_Color; } diff --git a/wgpu/src/shader/triangle.vert.spv b/wgpu/src/shader/triangle.vert.spv Binary files differindex bc39c451..871f4f55 100644 --- a/wgpu/src/shader/triangle.vert.spv +++ b/wgpu/src/shader/triangle.vert.spv diff --git a/wgpu/src/triangle.rs b/wgpu/src/triangle.rs index 38157d00..d149eebc 100644 --- a/wgpu/src/triangle.rs +++ b/wgpu/src/triangle.rs @@ -1,32 +1,82 @@ //! Draw meshes of triangles. -use crate::Transformation; -use iced_native::Rectangle; +use crate::{settings, Transformation}; +use iced_native::{Point, Rectangle}; use std::{mem, sync::Arc}; +mod msaa; + +const UNIFORM_BUFFER_SIZE: usize = 100; +const VERTEX_BUFFER_SIZE: usize = 100_000; +const INDEX_BUFFER_SIZE: usize = 100_000; + #[derive(Debug)] pub(crate) struct Pipeline { pipeline: wgpu::RenderPipeline, + blit: Option<msaa::Blit>, constants: wgpu::BindGroup, - constants_buffer: wgpu::Buffer, + uniforms_buffer: Buffer<Uniforms>, + vertex_buffer: Buffer<Vertex2D>, + index_buffer: Buffer<u32>, +} + +#[derive(Debug)] +struct Buffer<T> { + raw: wgpu::Buffer, + size: usize, + usage: wgpu::BufferUsage, + _type: std::marker::PhantomData<T>, +} + +impl<T> Buffer<T> { + pub fn new( + device: &wgpu::Device, + size: usize, + usage: wgpu::BufferUsage, + ) -> Self { + let raw = device.create_buffer(&wgpu::BufferDescriptor { + size: (std::mem::size_of::<T>() * size) as u64, + usage, + }); + + Buffer { + raw, + size, + usage, + _type: std::marker::PhantomData, + } + } + + pub fn ensure_capacity(&mut self, device: &wgpu::Device, size: usize) { + if self.size < size { + self.raw = device.create_buffer(&wgpu::BufferDescriptor { + size: (std::mem::size_of::<T>() * size) as u64, + usage: self.usage, + }); + + self.size = size; + } + } } impl Pipeline { - pub fn new(device: &mut wgpu::Device) -> Pipeline { + pub fn new( + device: &mut wgpu::Device, + antialiasing: Option<settings::Antialiasing>, + ) -> Pipeline { let constant_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor { bindings: &[wgpu::BindGroupLayoutBinding { binding: 0, visibility: wgpu::ShaderStage::VERTEX, - ty: wgpu::BindingType::UniformBuffer { dynamic: false }, + ty: wgpu::BindingType::UniformBuffer { dynamic: true }, }], }); - let constants_buffer = device - .create_buffer_mapped( - 1, - wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST, - ) - .fill_from_slice(&[Uniforms::default()]); + let constants_buffer = Buffer::new( + device, + UNIFORM_BUFFER_SIZE, + wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST, + ); let constant_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor { @@ -34,7 +84,7 @@ impl Pipeline { bindings: &[wgpu::Binding { binding: 0, resource: wgpu::BindingResource::Buffer { - buffer: &constants_buffer, + buffer: &constants_buffer.raw, range: 0..std::mem::size_of::<Uniforms>() as u64, }, }], @@ -91,7 +141,7 @@ impl Pipeline { write_mask: wgpu::ColorWrite::ALL, }], depth_stencil_state: None, - index_format: wgpu::IndexFormat::Uint16, + index_format: wgpu::IndexFormat::Uint32, vertex_buffers: &[wgpu::VertexBufferDescriptor { stride: mem::size_of::<Vertex2D>() as u64, step_mode: wgpu::InputStepMode::Vertex, @@ -110,15 +160,28 @@ impl Pipeline { }, ], }], - sample_count: 1, + sample_count: antialiasing + .map(|a| a.sample_count()) + .unwrap_or(1), sample_mask: !0, alpha_to_coverage_enabled: false, }); Pipeline { pipeline, + blit: antialiasing.map(|a| msaa::Blit::new(device, a)), constants: constant_bind_group, - constants_buffer, + uniforms_buffer: constants_buffer, + vertex_buffer: Buffer::new( + device, + VERTEX_BUFFER_SIZE, + wgpu::BufferUsage::VERTEX | wgpu::BufferUsage::COPY_DST, + ), + index_buffer: Buffer::new( + device, + INDEX_BUFFER_SIZE, + wgpu::BufferUsage::INDEX | wgpu::BufferUsage::COPY_DST, + ), } } @@ -127,74 +190,156 @@ impl Pipeline { device: &mut wgpu::Device, encoder: &mut wgpu::CommandEncoder, target: &wgpu::TextureView, + target_width: u32, + target_height: u32, transformation: Transformation, - scale: f32, - meshes: &Vec<Arc<Mesh2D>>, + meshes: &Vec<(Point, Arc<Mesh2D>)>, bounds: Rectangle<u32>, ) { - let uniforms = Uniforms { - transform: transformation.into(), - scale, - }; + // This looks a bit crazy, but we are just counting how many vertices + // and indices we will need to handle. + // TODO: Improve readability + let (total_vertices, total_indices) = meshes + .iter() + .map(|(_, mesh)| (mesh.vertices.len(), mesh.indices.len())) + .fold((0, 0), |(total_v, total_i), (v, i)| { + (total_v + v, total_i + i) + }); - let constants_buffer = device - .create_buffer_mapped(1, wgpu::BufferUsage::COPY_SRC) - .fill_from_slice(&[uniforms]); + // Then we ensure the current buffers are big enough, resizing if + // necessary + self.uniforms_buffer.ensure_capacity(device, meshes.len()); + self.vertex_buffer.ensure_capacity(device, total_vertices); + self.index_buffer.ensure_capacity(device, total_indices); - encoder.copy_buffer_to_buffer( - &constants_buffer, - 0, - &self.constants_buffer, - 0, - std::mem::size_of::<Uniforms>() as u64, - ); + let mut uniforms: Vec<Uniforms> = Vec::with_capacity(meshes.len()); + let mut offsets: Vec<( + wgpu::BufferAddress, + wgpu::BufferAddress, + usize, + )> = Vec::with_capacity(meshes.len()); + let mut last_vertex = 0; + let mut last_index = 0; - let mut render_pass = - encoder.begin_render_pass(&wgpu::RenderPassDescriptor { - color_attachments: &[ - wgpu::RenderPassColorAttachmentDescriptor { - attachment: target, - resolve_target: None, - load_op: wgpu::LoadOp::Load, - store_op: wgpu::StoreOp::Store, - clear_color: wgpu::Color { - r: 0.0, - g: 0.0, - b: 0.0, - a: 0.0, - }, - }, - ], - depth_stencil_attachment: None, - }); + // We upload everything upfront + for (origin, mesh) in meshes { + let transform = Uniforms { + transform: (transformation + * Transformation::translate(origin.x, origin.y)) + .into(), + }; - for mesh in meshes { - let vertices_buffer = device + let vertex_buffer = device .create_buffer_mapped( mesh.vertices.len(), - wgpu::BufferUsage::VERTEX, + wgpu::BufferUsage::COPY_SRC, ) .fill_from_slice(&mesh.vertices); - let indices_buffer = device + let index_buffer = device .create_buffer_mapped( mesh.indices.len(), - wgpu::BufferUsage::INDEX, + wgpu::BufferUsage::COPY_SRC, ) .fill_from_slice(&mesh.indices); - render_pass.set_pipeline(&self.pipeline); - render_pass.set_bind_group(0, &self.constants, &[]); - render_pass.set_index_buffer(&indices_buffer, 0); - render_pass.set_vertex_buffers(0, &[(&vertices_buffer, 0)]); - render_pass.set_scissor_rect( - bounds.x, - bounds.y, - bounds.width, - bounds.height, + encoder.copy_buffer_to_buffer( + &vertex_buffer, + 0, + &self.vertex_buffer.raw, + last_vertex as u64, + (std::mem::size_of::<Vertex2D>() * mesh.vertices.len()) as u64, ); - render_pass.draw_indexed(0..mesh.indices.len() as u32, 0, 0..1); + encoder.copy_buffer_to_buffer( + &index_buffer, + 0, + &self.index_buffer.raw, + last_index as u64, + (std::mem::size_of::<u32>() * mesh.indices.len()) as u64, + ); + + uniforms.push(transform); + offsets.push(( + last_vertex as u64, + last_index as u64, + mesh.indices.len(), + )); + + last_vertex += mesh.vertices.len(); + last_index += mesh.indices.len(); + } + + let uniforms_buffer = device + .create_buffer_mapped(uniforms.len(), wgpu::BufferUsage::COPY_SRC) + .fill_from_slice(&uniforms); + + encoder.copy_buffer_to_buffer( + &uniforms_buffer, + 0, + &self.uniforms_buffer.raw, + 0, + (std::mem::size_of::<Uniforms>() * uniforms.len()) as u64, + ); + + { + let (attachment, resolve_target, load_op) = + if let Some(blit) = &mut self.blit { + let (attachment, resolve_target) = + blit.targets(device, target_width, target_height); + + (attachment, Some(resolve_target), wgpu::LoadOp::Clear) + } else { + (target, None, wgpu::LoadOp::Load) + }; + + let mut render_pass = + encoder.begin_render_pass(&wgpu::RenderPassDescriptor { + color_attachments: &[ + wgpu::RenderPassColorAttachmentDescriptor { + attachment, + resolve_target, + load_op, + store_op: wgpu::StoreOp::Store, + clear_color: wgpu::Color { + r: 0.0, + g: 0.0, + b: 0.0, + a: 0.0, + }, + }, + ], + depth_stencil_attachment: None, + }); + + for (i, (vertex_offset, index_offset, indices)) in + offsets.drain(..).enumerate() + { + render_pass.set_pipeline(&self.pipeline); + render_pass.set_bind_group( + 0, + &self.constants, + &[(std::mem::size_of::<Uniforms>() * i) as u64], + ); + render_pass + .set_index_buffer(&self.index_buffer.raw, index_offset); + render_pass.set_vertex_buffers( + 0, + &[(&self.vertex_buffer.raw, vertex_offset)], + ); + render_pass.set_scissor_rect( + bounds.x, + bounds.y, + bounds.width, + bounds.height, + ); + + render_pass.draw_indexed(0..indices as u32, 0, 0..1); + } + } + + if let Some(blit) = &mut self.blit { + blit.draw(encoder, target); } } } @@ -203,14 +348,12 @@ impl Pipeline { #[derive(Debug, Clone, Copy)] struct Uniforms { transform: [f32; 16], - scale: f32, } impl Default for Uniforms { fn default() -> Self { Self { transform: *Transformation::identity().as_ref(), - scale: 1.0, } } } @@ -235,5 +378,5 @@ pub struct Mesh2D { /// The list of vertex indices that defines the triangles of the mesh. /// /// Therefore, this list should always have a length that is a multiple of 3. - pub indices: Vec<u16>, + pub indices: Vec<u32>, } diff --git a/wgpu/src/triangle/msaa.rs b/wgpu/src/triangle/msaa.rs new file mode 100644 index 00000000..0def5352 --- /dev/null +++ b/wgpu/src/triangle/msaa.rs @@ -0,0 +1,258 @@ +use crate::settings; + +#[derive(Debug)] +pub struct Blit { + pipeline: wgpu::RenderPipeline, + constants: wgpu::BindGroup, + texture_layout: wgpu::BindGroupLayout, + sample_count: u32, + targets: Option<Targets>, +} + +impl Blit { + pub fn new( + device: &wgpu::Device, + antialiasing: settings::Antialiasing, + ) -> Blit { + let sampler = device.create_sampler(&wgpu::SamplerDescriptor { + address_mode_u: wgpu::AddressMode::ClampToEdge, + address_mode_v: wgpu::AddressMode::ClampToEdge, + address_mode_w: wgpu::AddressMode::ClampToEdge, + mag_filter: wgpu::FilterMode::Linear, + min_filter: wgpu::FilterMode::Linear, + mipmap_filter: wgpu::FilterMode::Linear, + lod_min_clamp: -100.0, + lod_max_clamp: 100.0, + compare_function: wgpu::CompareFunction::Always, + }); + + let constant_layout = + device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor { + bindings: &[wgpu::BindGroupLayoutBinding { + binding: 0, + visibility: wgpu::ShaderStage::FRAGMENT, + ty: wgpu::BindingType::Sampler, + }], + }); + + let constant_bind_group = + device.create_bind_group(&wgpu::BindGroupDescriptor { + layout: &constant_layout, + bindings: &[wgpu::Binding { + binding: 0, + resource: wgpu::BindingResource::Sampler(&sampler), + }], + }); + + let texture_layout = + device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor { + bindings: &[wgpu::BindGroupLayoutBinding { + binding: 0, + visibility: wgpu::ShaderStage::FRAGMENT, + ty: wgpu::BindingType::SampledTexture { + multisampled: false, + dimension: wgpu::TextureViewDimension::D2, + }, + }], + }); + + let layout = + device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor { + bind_group_layouts: &[&constant_layout, &texture_layout], + }); + + let vs = include_bytes!("../shader/blit.vert.spv"); + let vs_module = device.create_shader_module( + &wgpu::read_spirv(std::io::Cursor::new(&vs[..])) + .expect("Read blit vertex shader as SPIR-V"), + ); + + let fs = include_bytes!("../shader/blit.frag.spv"); + let fs_module = device.create_shader_module( + &wgpu::read_spirv(std::io::Cursor::new(&fs[..])) + .expect("Read blit fragment shader as SPIR-V"), + ); + + let pipeline = + device.create_render_pipeline(&wgpu::RenderPipelineDescriptor { + layout: &layout, + vertex_stage: wgpu::ProgrammableStageDescriptor { + module: &vs_module, + entry_point: "main", + }, + fragment_stage: Some(wgpu::ProgrammableStageDescriptor { + module: &fs_module, + entry_point: "main", + }), + rasterization_state: Some(wgpu::RasterizationStateDescriptor { + front_face: wgpu::FrontFace::Cw, + cull_mode: wgpu::CullMode::None, + depth_bias: 0, + depth_bias_slope_scale: 0.0, + depth_bias_clamp: 0.0, + }), + primitive_topology: wgpu::PrimitiveTopology::TriangleList, + color_states: &[wgpu::ColorStateDescriptor { + format: wgpu::TextureFormat::Bgra8UnormSrgb, + color_blend: wgpu::BlendDescriptor { + src_factor: wgpu::BlendFactor::SrcAlpha, + dst_factor: wgpu::BlendFactor::OneMinusSrcAlpha, + operation: wgpu::BlendOperation::Add, + }, + alpha_blend: wgpu::BlendDescriptor { + src_factor: wgpu::BlendFactor::One, + dst_factor: wgpu::BlendFactor::OneMinusSrcAlpha, + operation: wgpu::BlendOperation::Add, + }, + write_mask: wgpu::ColorWrite::ALL, + }], + depth_stencil_state: None, + index_format: wgpu::IndexFormat::Uint16, + vertex_buffers: &[], + sample_count: 1, + sample_mask: !0, + alpha_to_coverage_enabled: false, + }); + + Blit { + pipeline, + constants: constant_bind_group, + texture_layout: texture_layout, + sample_count: antialiasing.sample_count(), + targets: None, + } + } + + pub fn targets( + &mut self, + device: &wgpu::Device, + width: u32, + height: u32, + ) -> (&wgpu::TextureView, &wgpu::TextureView) { + match &mut self.targets { + None => { + self.targets = Some(Targets::new( + &device, + &self.texture_layout, + self.sample_count, + width, + height, + )); + } + Some(targets) => { + if targets.width != width || targets.height != height { + self.targets = Some(Targets::new( + &device, + &self.texture_layout, + self.sample_count, + width, + height, + )); + } + } + } + + let targets = self.targets.as_ref().unwrap(); + + (&targets.attachment, &targets.resolve) + } + + pub fn draw( + &self, + encoder: &mut wgpu::CommandEncoder, + target: &wgpu::TextureView, + ) { + let mut render_pass = + encoder.begin_render_pass(&wgpu::RenderPassDescriptor { + color_attachments: &[ + wgpu::RenderPassColorAttachmentDescriptor { + attachment: target, + resolve_target: None, + load_op: wgpu::LoadOp::Load, + store_op: wgpu::StoreOp::Store, + clear_color: wgpu::Color { + r: 0.0, + g: 0.0, + b: 0.0, + a: 0.0, + }, + }, + ], + depth_stencil_attachment: None, + }); + + render_pass.set_pipeline(&self.pipeline); + render_pass.set_bind_group(0, &self.constants, &[]); + render_pass.set_bind_group( + 1, + &self.targets.as_ref().unwrap().bind_group, + &[], + ); + render_pass.draw(0..6, 0..1); + } +} + +#[derive(Debug)] +struct Targets { + attachment: wgpu::TextureView, + resolve: wgpu::TextureView, + bind_group: wgpu::BindGroup, + width: u32, + height: u32, +} + +impl Targets { + pub fn new( + device: &wgpu::Device, + texture_layout: &wgpu::BindGroupLayout, + sample_count: u32, + width: u32, + height: u32, + ) -> Targets { + let extent = wgpu::Extent3d { + width, + height, + depth: 1, + }; + + let attachment = device.create_texture(&wgpu::TextureDescriptor { + size: extent, + array_layer_count: 1, + mip_level_count: 1, + sample_count, + dimension: wgpu::TextureDimension::D2, + format: wgpu::TextureFormat::Bgra8UnormSrgb, + usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT, + }); + + let resolve = device.create_texture(&wgpu::TextureDescriptor { + size: extent, + array_layer_count: 1, + mip_level_count: 1, + sample_count: 1, + dimension: wgpu::TextureDimension::D2, + format: wgpu::TextureFormat::Bgra8UnormSrgb, + usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT + | wgpu::TextureUsage::SAMPLED, + }); + + let attachment = attachment.create_default_view(); + let resolve = resolve.create_default_view(); + + let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor { + layout: texture_layout, + bindings: &[wgpu::Binding { + binding: 0, + resource: wgpu::BindingResource::TextureView(&resolve), + }], + }); + + Targets { + attachment, + resolve, + bind_group, + width, + height, + } + } +} diff --git a/wgpu/src/widget.rs b/wgpu/src/widget.rs index e3edda0b..73cce7e2 100644 --- a/wgpu/src/widget.rs +++ b/wgpu/src/widget.rs @@ -32,3 +32,10 @@ pub use scrollable::Scrollable; pub use slider::Slider; #[doc(no_inline)] pub use text_input::TextInput; + +#[cfg(feature = "canvas")] +pub mod canvas; + +#[cfg(feature = "canvas")] +#[doc(no_inline)] +pub use canvas::Canvas; diff --git a/wgpu/src/widget/canvas.rs b/wgpu/src/widget/canvas.rs new file mode 100644 index 00000000..38c1ce62 --- /dev/null +++ b/wgpu/src/widget/canvas.rs @@ -0,0 +1,149 @@ +//! Draw 2D graphics for your users. +//! +//! A [`Canvas`] widget can be used to draw different kinds of 2D shapes in a +//! [`Frame`]. It can be used for animation, data visualization, game graphics, +//! and more! +//! +//! [`Canvas`]: struct.Canvas.html +//! [`Frame`]: struct.Frame.html +use crate::{Defaults, Primitive, Renderer}; + +use iced_native::{ + layout, Element, Hasher, Layout, Length, MouseCursor, Point, Size, Widget, +}; +use std::hash::Hash; + +pub mod layer; +pub mod path; + +mod drawable; +mod fill; +mod frame; +mod stroke; + +pub use drawable::Drawable; +pub use fill::Fill; +pub use frame::Frame; +pub use layer::Layer; +pub use path::Path; +pub use stroke::{LineCap, LineJoin, Stroke}; + +/// A widget capable of drawing 2D graphics. +/// +/// A [`Canvas`] may contain multiple layers. A [`Layer`] is drawn using the +/// painter's algorithm. In other words, layers will be drawn on top of each in +/// the same order they are pushed into the [`Canvas`]. +/// +/// [`Canvas`]: struct.Canvas.html +/// [`Layer`]: layer/trait.Layer.html +#[derive(Debug)] +pub struct Canvas<'a> { + width: Length, + height: Length, + layers: Vec<Box<dyn Layer + 'a>>, +} + +impl<'a> Canvas<'a> { + const DEFAULT_SIZE: u16 = 100; + + /// Creates a new [`Canvas`] with no layers. + /// + /// [`Canvas`]: struct.Canvas.html + pub fn new() -> Self { + Canvas { + width: Length::Units(Self::DEFAULT_SIZE), + height: Length::Units(Self::DEFAULT_SIZE), + layers: Vec::new(), + } + } + + /// Sets the width of the [`Canvas`]. + /// + /// [`Canvas`]: struct.Canvas.html + pub fn width(mut self, width: Length) -> Self { + self.width = width; + self + } + + /// Sets the height of the [`Canvas`]. + /// + /// [`Canvas`]: struct.Canvas.html + pub fn height(mut self, height: Length) -> Self { + self.height = height; + self + } + + /// Adds a [`Layer`] to the [`Canvas`]. + /// + /// It will be drawn on top of previous layers. + /// + /// [`Layer`]: layer/trait.Layer.html + /// [`Canvas`]: struct.Canvas.html + pub fn push(mut self, layer: impl Layer + 'a) -> Self { + self.layers.push(Box::new(layer)); + self + } +} + +impl<'a, Message> Widget<Message, Renderer> for Canvas<'a> { + fn width(&self) -> Length { + self.width + } + + fn height(&self) -> Length { + self.height + } + + fn layout( + &self, + _renderer: &Renderer, + limits: &layout::Limits, + ) -> layout::Node { + let limits = limits.width(self.width).height(self.height); + let size = limits.resolve(Size::ZERO); + + layout::Node::new(size) + } + + fn draw( + &self, + _renderer: &mut Renderer, + _defaults: &Defaults, + layout: Layout<'_>, + _cursor_position: Point, + ) -> (Primitive, MouseCursor) { + let bounds = layout.bounds(); + let origin = Point::new(bounds.x, bounds.y); + let size = Size::new(bounds.width, bounds.height); + + ( + Primitive::Group { + primitives: self + .layers + .iter() + .map(|layer| Primitive::Mesh2D { + origin, + buffers: layer.draw(size), + }) + .collect(), + }, + MouseCursor::Idle, + ) + } + + fn hash_layout(&self, state: &mut Hasher) { + std::any::TypeId::of::<Canvas<'static>>().hash(state); + + self.width.hash(state); + self.height.hash(state); + } +} + +impl<'a, Message> From<Canvas<'a>> for Element<'a, Message, Renderer> +where + Message: 'static, +{ + fn from(canvas: Canvas<'a>) -> Element<'a, Message, Renderer> { + Element::new(canvas) + } +} diff --git a/wgpu/src/widget/canvas/drawable.rs b/wgpu/src/widget/canvas/drawable.rs new file mode 100644 index 00000000..6c74071c --- /dev/null +++ b/wgpu/src/widget/canvas/drawable.rs @@ -0,0 +1,12 @@ +use crate::canvas::Frame; + +/// A type that can be drawn on a [`Frame`]. +/// +/// [`Frame`]: struct.Frame.html +pub trait Drawable { + /// Draws the [`Drawable`] on the given [`Frame`]. + /// + /// [`Drawable`]: trait.Drawable.html + /// [`Frame`]: struct.Frame.html + fn draw(&self, frame: &mut Frame); +} diff --git a/wgpu/src/widget/canvas/fill.rs b/wgpu/src/widget/canvas/fill.rs new file mode 100644 index 00000000..5ce24cf3 --- /dev/null +++ b/wgpu/src/widget/canvas/fill.rs @@ -0,0 +1,14 @@ +use iced_native::Color; + +/// The style used to fill geometry. +#[derive(Debug, Clone, Copy)] +pub enum Fill { + /// Fill with a color. + Color(Color), +} + +impl Default for Fill { + fn default() -> Fill { + Fill::Color(Color::BLACK) + } +} diff --git a/wgpu/src/widget/canvas/frame.rs b/wgpu/src/widget/canvas/frame.rs new file mode 100644 index 00000000..fa6d8c0a --- /dev/null +++ b/wgpu/src/widget/canvas/frame.rs @@ -0,0 +1,255 @@ +use iced_native::{Point, Size, Vector}; + +use crate::{ + canvas::{Fill, Path, Stroke}, + triangle, +}; + +/// The frame of a [`Canvas`]. +/// +/// [`Canvas`]: struct.Canvas.html +#[derive(Debug)] +pub struct Frame { + width: f32, + height: f32, + buffers: lyon::tessellation::VertexBuffers<triangle::Vertex2D, u32>, + transforms: Transforms, +} + +#[derive(Debug)] +struct Transforms { + previous: Vec<Transform>, + current: Transform, +} + +#[derive(Debug, Clone, Copy)] +struct Transform { + raw: lyon::math::Transform, + is_identity: bool, +} + +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. + /// + /// [`Frame`]: struct.Frame.html + pub fn new(width: f32, height: f32) -> Frame { + Frame { + width, + height, + buffers: lyon::tessellation::VertexBuffers::new(), + transforms: Transforms { + previous: Vec::new(), + current: Transform { + raw: lyon::math::Transform::identity(), + is_identity: true, + }, + }, + } + } + + /// Returns the width of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn width(&self) -> f32 { + self.width + } + + /// Returns the width of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn height(&self) -> f32 { + self.height + } + + /// Returns the dimensions of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn size(&self) -> Size { + Size::new(self.width, self.height) + } + + /// Returns the coordinate of the center of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn center(&self) -> Point { + Point::new(self.width / 2.0, self.height / 2.0) + } + + /// Draws the given [`Path`] on the [`Frame`] by filling it with the + /// provided style. + /// + /// [`Path`]: path/struct.Path.html + /// [`Frame`]: struct.Frame.html + pub fn fill(&mut self, path: &Path, fill: Fill) { + use lyon::tessellation::{ + BuffersBuilder, FillOptions, FillTessellator, + }; + + let mut buffers = BuffersBuilder::new( + &mut self.buffers, + FillVertex(match fill { + Fill::Color(color) => color.into_linear(), + }), + ); + + let mut tessellator = FillTessellator::new(); + + let result = if self.transforms.current.is_identity { + tessellator.tessellate_path( + path.raw(), + &FillOptions::default(), + &mut buffers, + ) + } else { + let path = path.transformed(&self.transforms.current.raw); + + tessellator.tessellate_path( + path.raw(), + &FillOptions::default(), + &mut buffers, + ) + }; + + let _ = result.expect("Tessellate path"); + } + + /// Draws the stroke of the given [`Path`] on the [`Frame`] with the + /// provided style. + /// + /// [`Path`]: path/struct.Path.html + /// [`Frame`]: struct.Frame.html + pub fn stroke(&mut self, path: &Path, stroke: Stroke) { + use lyon::tessellation::{ + BuffersBuilder, StrokeOptions, StrokeTessellator, + }; + + let mut buffers = BuffersBuilder::new( + &mut self.buffers, + StrokeVertex(stroke.color.into_linear()), + ); + + let mut tessellator = StrokeTessellator::new(); + + let mut options = StrokeOptions::default(); + options.line_width = stroke.width; + options.start_cap = stroke.line_cap.into(); + options.end_cap = stroke.line_cap.into(); + options.line_join = stroke.line_join.into(); + + let result = if self.transforms.current.is_identity { + tessellator.tessellate_path(path.raw(), &options, &mut buffers) + } else { + let path = path.transformed(&self.transforms.current.raw); + + tessellator.tessellate_path(path.raw(), &options, &mut buffers) + }; + + let _ = result.expect("Stroke path"); + } + + /// 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. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn with_save(&mut self, f: impl FnOnce(&mut Frame)) { + self.transforms.previous.push(self.transforms.current); + + f(self); + + self.transforms.current = self.transforms.previous.pop().unwrap(); + } + + /// Applies a translation to the current transform of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn translate(&mut self, translation: Vector) { + self.transforms.current.raw = self + .transforms + .current + .raw + .pre_translate(lyon::math::Vector::new( + translation.x, + translation.y, + )); + self.transforms.current.is_identity = false; + } + + /// Applies a rotation to the current transform of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn rotate(&mut self, angle: f32) { + self.transforms.current.raw = self + .transforms + .current + .raw + .pre_rotate(lyon::math::Angle::radians(-angle)); + self.transforms.current.is_identity = false; + } + + /// Applies a scaling to the current transform of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn scale(&mut self, scale: f32) { + self.transforms.current.raw = + self.transforms.current.raw.pre_scale(scale, scale); + self.transforms.current.is_identity = false; + } + + /// Produces the geometry that has been drawn on the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + pub fn into_mesh(self) -> triangle::Mesh2D { + triangle::Mesh2D { + vertices: self.buffers.vertices, + indices: self.buffers.indices, + } + } +} + +struct FillVertex([f32; 4]); + +impl lyon::tessellation::FillVertexConstructor<triangle::Vertex2D> + for FillVertex +{ + fn new_vertex( + &mut self, + position: lyon::math::Point, + _attributes: lyon::tessellation::FillAttributes<'_>, + ) -> triangle::Vertex2D { + triangle::Vertex2D { + position: [position.x, position.y], + color: self.0, + } + } +} + +struct StrokeVertex([f32; 4]); + +impl lyon::tessellation::StrokeVertexConstructor<triangle::Vertex2D> + for StrokeVertex +{ + fn new_vertex( + &mut self, + position: lyon::math::Point, + _attributes: lyon::tessellation::StrokeAttributes<'_, '_>, + ) -> triangle::Vertex2D { + triangle::Vertex2D { + position: [position.x, position.y], + color: self.0, + } + } +} diff --git a/wgpu/src/widget/canvas/layer.rs b/wgpu/src/widget/canvas/layer.rs new file mode 100644 index 00000000..82d647bb --- /dev/null +++ b/wgpu/src/widget/canvas/layer.rs @@ -0,0 +1,25 @@ +//! Produce, store, and reuse geometry. +mod cache; + +pub use cache::Cache; + +use crate::triangle; + +use iced_native::Size; +use std::sync::Arc; + +/// A layer that can be presented at a [`Canvas`]. +/// +/// [`Canvas`]: ../struct.Canvas.html +pub trait Layer: std::fmt::Debug { + /// Draws the [`Layer`] in the given bounds and produces [`Mesh2D`] as a + /// result. + /// + /// The [`Layer`] may choose to store the produced [`Mesh2D`] locally and + /// only recompute it when the bounds change, its contents change, or is + /// otherwise explicitly cleared by other means. + /// + /// [`Layer`]: trait.Layer.html + /// [`Mesh2D`]: ../../../triangle/struct.Mesh2D.html + fn draw(&self, bounds: Size) -> Arc<triangle::Mesh2D>; +} diff --git a/wgpu/src/widget/canvas/layer/cache.rs b/wgpu/src/widget/canvas/layer/cache.rs new file mode 100644 index 00000000..3071cce0 --- /dev/null +++ b/wgpu/src/widget/canvas/layer/cache.rs @@ -0,0 +1,101 @@ +use crate::{ + canvas::{Drawable, Frame, Layer}, + triangle, +}; + +use iced_native::Size; +use std::cell::RefCell; +use std::marker::PhantomData; +use std::sync::Arc; + +/// A simple cache that stores generated geometry to avoid recomputation. +/// +/// A [`Cache`] will not redraw its geometry unless the dimensions of its layer +/// change or it is explicitly cleared. +/// +/// [`Layer`]: ../trait.Layer.html +/// [`Cached`]: struct.Cached.html +#[derive(Debug)] +pub struct Cache<T: Drawable> { + input: PhantomData<T>, + state: RefCell<State>, +} + +#[derive(Debug)] +enum State { + Empty, + Filled { + mesh: Arc<triangle::Mesh2D>, + bounds: Size, + }, +} + +impl<T> Cache<T> +where + T: Drawable + std::fmt::Debug, +{ + /// Creates a new empty [`Cache`]. + /// + /// [`Cache`]: struct.Cache.html + pub fn new() -> Self { + Cache { + input: PhantomData, + state: RefCell::new(State::Empty), + } + } + + /// Clears the cache, forcing a redraw the next time it is used. + /// + /// [`Cached`]: struct.Cached.html + pub fn clear(&mut self) { + *self.state.borrow_mut() = State::Empty; + } + + /// Binds the [`Cache`] with some data, producing a [`Layer`] that can be + /// added to a [`Canvas`]. + /// + /// [`Cache`]: struct.Cache.html + /// [`Layer`]: ../trait.Layer.html + /// [`Canvas`]: ../../struct.Canvas.html + pub fn with<'a>(&'a self, input: &'a T) -> impl Layer + 'a { + Bind { + cache: self, + input: input, + } + } +} + +#[derive(Debug)] +struct Bind<'a, T: Drawable> { + cache: &'a Cache<T>, + input: &'a T, +} + +impl<'a, T> Layer for Bind<'a, T> +where + T: Drawable + std::fmt::Debug, +{ + fn draw(&self, current_bounds: Size) -> Arc<triangle::Mesh2D> { + use std::ops::Deref; + + if let State::Filled { mesh, bounds } = + self.cache.state.borrow().deref() + { + if *bounds == current_bounds { + return mesh.clone(); + } + } + + let mut frame = Frame::new(current_bounds.width, current_bounds.height); + self.input.draw(&mut frame); + + let mesh = Arc::new(frame.into_mesh()); + + *self.cache.state.borrow_mut() = State::Filled { + mesh: mesh.clone(), + bounds: current_bounds, + }; + + mesh + } +} diff --git a/wgpu/src/widget/canvas/path.rs b/wgpu/src/widget/canvas/path.rs new file mode 100644 index 00000000..15c2e853 --- /dev/null +++ b/wgpu/src/widget/canvas/path.rs @@ -0,0 +1,49 @@ +//! Build different kinds of 2D shapes. +pub mod arc; + +mod builder; + +pub use arc::Arc; +pub use builder::Builder; + +/// An immutable set of points that may or may not be connected. +/// +/// A single [`Path`] can represent different kinds of 2D shapes! +/// +/// [`Path`]: struct.Path.html +#[derive(Debug, Clone)] +pub struct Path { + raw: lyon::path::Path, +} + +impl Path { + /// Creates a new [`Path`] with the provided closure. + /// + /// Use the [`Builder`] to configure your [`Path`]. + /// + /// [`Path`]: struct.Path.html + /// [`Builder`]: struct.Builder.html + pub fn new(f: impl FnOnce(&mut Builder)) -> Self { + let mut builder = Builder::new(); + + // TODO: Make it pure instead of side-effect-based (?) + f(&mut builder); + + builder.build() + } + + #[inline] + pub(crate) fn raw(&self) -> &lyon::path::Path { + &self.raw + } + + #[inline] + pub(crate) fn transformed( + &self, + transform: &lyon::math::Transform, + ) -> Path { + Path { + raw: self.raw.transformed(transform), + } + } +} diff --git a/wgpu/src/widget/canvas/path/arc.rs b/wgpu/src/widget/canvas/path/arc.rs new file mode 100644 index 00000000..343191f1 --- /dev/null +++ b/wgpu/src/widget/canvas/path/arc.rs @@ -0,0 +1,44 @@ +//! Build and draw curves. +use iced_native::{Point, Vector}; + +/// A segment of a differentiable curve. +#[derive(Debug, Clone, Copy)] +pub struct Arc { + /// The center of the arc. + pub center: Point, + /// The radius of the arc. + pub radius: f32, + /// The start of the segment's angle, clockwise rotation. + pub start_angle: f32, + /// The end of the segment's angle, clockwise rotation. + pub end_angle: f32, +} + +/// An elliptical [`Arc`]. +/// +/// [`Arc`]: struct.Arc.html +#[derive(Debug, Clone, Copy)] +pub struct Elliptical { + /// The center of the arc. + pub center: Point, + /// The radii of the arc's ellipse, defining its axes. + pub radii: Vector, + /// The rotation of the arc's ellipse. + pub rotation: f32, + /// The start of the segment's angle, clockwise rotation. + pub start_angle: f32, + /// The end of the segment's angle, clockwise rotation. + pub end_angle: f32, +} + +impl From<Arc> for Elliptical { + fn from(arc: Arc) -> Elliptical { + Elliptical { + center: arc.center, + radii: Vector::new(arc.radius, arc.radius), + rotation: 0.0, + start_angle: arc.start_angle, + end_angle: arc.end_angle, + } + } +} diff --git a/wgpu/src/widget/canvas/path/builder.rs b/wgpu/src/widget/canvas/path/builder.rs new file mode 100644 index 00000000..a013149e --- /dev/null +++ b/wgpu/src/widget/canvas/path/builder.rs @@ -0,0 +1,177 @@ +use crate::canvas::path::{arc, Arc, Path}; + +use iced_native::{Point, Size}; +use lyon::path::builder::{Build, FlatPathBuilder, PathBuilder, SvgBuilder}; + +/// A [`Path`] builder. +/// +/// Once a [`Path`] is built, it can no longer be mutated. +/// +/// [`Path`]: struct.Path.html +#[allow(missing_debug_implementations)] +pub struct Builder { + raw: lyon::path::builder::SvgPathBuilder<lyon::path::Builder>, +} + +impl Builder { + /// Creates a new [`Builder`]. + /// + /// [`Builder`]: struct.Builder.html + pub fn new() -> Builder { + Builder { + raw: lyon::path::Path::builder().with_svg(), + } + } + + /// Moves the starting point of a new sub-path to the given `Point`. + #[inline] + pub fn move_to(&mut self, point: Point) { + let _ = self.raw.move_to(lyon::math::Point::new(point.x, point.y)); + } + + /// Connects the last point in the [`Path`] to the given `Point` with a + /// straight line. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn line_to(&mut self, point: Point) { + let _ = self.raw.line_to(lyon::math::Point::new(point.x, point.y)); + } + + /// Adds an [`Arc`] to the [`Path`] from `start_angle` to `end_angle` in + /// a clockwise direction. + /// + /// [`Arc`]: struct.Arc.html + /// [`Path`]: struct.Path.html + #[inline] + pub fn arc(&mut self, arc: Arc) { + self.ellipse(arc.into()); + } + + /// Adds a circular arc to the [`Path`] with the given control points and + /// radius. + /// + /// The arc is connected to the previous point by a straight line, if + /// necessary. + /// + /// [`Path`]: struct.Path.html + pub fn arc_to(&mut self, a: Point, b: Point, radius: f32) { + use lyon::{math, path}; + + let a = math::Point::new(a.x, a.y); + + if self.raw.current_position() != a { + let _ = self.raw.line_to(a); + } + + let _ = self.raw.arc_to( + math::Vector::new(radius, radius), + math::Angle::radians(0.0), + path::ArcFlags::default(), + math::Point::new(b.x, b.y), + ); + } + + /// Adds an [`Ellipse`] to the [`Path`] using a clockwise direction. + /// + /// [`Ellipse`]: struct.Arc.html + /// [`Path`]: struct.Path.html + pub fn ellipse(&mut self, arc: arc::Elliptical) { + use lyon::{geom, math}; + + let arc = geom::Arc { + center: math::Point::new(arc.center.x, arc.center.y), + radii: math::Vector::new(arc.radii.x, arc.radii.y), + x_rotation: math::Angle::radians(arc.rotation), + start_angle: math::Angle::radians(arc.start_angle), + sweep_angle: math::Angle::radians(arc.end_angle), + }; + + let _ = self.raw.move_to(arc.sample(0.0)); + + arc.for_each_quadratic_bezier(&mut |curve| { + let _ = self.raw.quadratic_bezier_to(curve.ctrl, curve.to); + }); + } + + /// Adds a cubic Bézier curve to the [`Path`] given its two control points + /// and its end point. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn bezier_curve_to( + &mut self, + control_a: Point, + control_b: Point, + to: Point, + ) { + use lyon::math; + + let _ = self.raw.cubic_bezier_to( + math::Point::new(control_a.x, control_a.y), + math::Point::new(control_b.x, control_b.y), + math::Point::new(to.x, to.y), + ); + } + + /// Adds a quadratic Bézier curve to the [`Path`] given its control point + /// and its end point. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn quadratic_curve_to(&mut self, control: Point, to: Point) { + use lyon::math; + + let _ = self.raw.quadratic_bezier_to( + math::Point::new(control.x, control.y), + math::Point::new(to.x, to.y), + ); + } + + /// Adds a rectangle to the [`Path`] given its top-left corner coordinate + /// and its `Size`. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn rectangle(&mut self, p: Point, size: Size) { + self.move_to(p); + self.line_to(Point::new(p.x + size.width, p.y)); + self.line_to(Point::new(p.x + size.width, p.y + size.height)); + self.line_to(Point::new(p.x, p.y + size.height)); + self.close(); + } + + /// Adds a circle to the [`Path`] given its center coordinate and its + /// radius. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn circle(&mut self, center: Point, radius: f32) { + self.arc(Arc { + center, + radius, + start_angle: 0.0, + end_angle: 2.0 * std::f32::consts::PI, + }); + } + + /// Closes the current sub-path in the [`Path`] with a straight line to + /// the starting point. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn close(&mut self) { + self.raw.close() + } + + /// Builds the [`Path`] of this [`Builder`]. + /// + /// [`Path`]: struct.Path.html + /// [`Builder`]: struct.Builder.html + #[inline] + pub fn build(self) -> Path { + Path { + raw: self.raw.build(), + } + } +} diff --git a/wgpu/src/widget/canvas/stroke.rs b/wgpu/src/widget/canvas/stroke.rs new file mode 100644 index 00000000..46d669c4 --- /dev/null +++ b/wgpu/src/widget/canvas/stroke.rs @@ -0,0 +1,83 @@ +use iced_native::Color; + +/// The style of a stroke. +#[derive(Debug, Clone, Copy)] +pub struct Stroke { + /// The color of the stroke. + pub color: Color, + /// The distance between the two edges of the stroke. + pub width: f32, + /// The shape to be used at the end of open subpaths when they are stroked. + pub line_cap: LineCap, + /// The shape to be used at the corners of paths or basic shapes when they + /// are stroked. + pub line_join: LineJoin, +} + +impl Default for Stroke { + fn default() -> Stroke { + Stroke { + color: Color::BLACK, + width: 1.0, + line_cap: LineCap::default(), + line_join: LineJoin::default(), + } + } +} + +/// The shape used at the end of open subpaths when they are stroked. +#[derive(Debug, Clone, Copy)] +pub enum LineCap { + /// The stroke for each sub-path does not extend beyond its two endpoints. + Butt, + /// At the end of each sub-path, the shape representing the stroke will be + /// extended by a square. + Square, + /// At the end of each sub-path, the shape representing the stroke will be + /// extended by a semicircle. + Round, +} + +impl Default for LineCap { + fn default() -> LineCap { + LineCap::Butt + } +} + +impl From<LineCap> for lyon::tessellation::LineCap { + fn from(line_cap: LineCap) -> lyon::tessellation::LineCap { + match line_cap { + LineCap::Butt => lyon::tessellation::LineCap::Butt, + LineCap::Square => lyon::tessellation::LineCap::Square, + LineCap::Round => lyon::tessellation::LineCap::Round, + } + } +} + +/// The shape used at the corners of paths or basic shapes when they are +/// stroked. +#[derive(Debug, Clone, Copy)] +pub enum LineJoin { + /// A sharp corner. + Miter, + /// A round corner. + Round, + /// A bevelled corner. + Bevel, +} + +impl Default for LineJoin { + fn default() -> LineJoin { + LineJoin::Miter + } +} + +impl From<LineJoin> for lyon::tessellation::LineJoin { + fn from(line_join: LineJoin) -> lyon::tessellation::LineJoin { + match line_join { + LineJoin::Miter => lyon::tessellation::LineJoin::Miter, + LineJoin::Round => lyon::tessellation::LineJoin::Round, + LineJoin::Bevel => lyon::tessellation::LineJoin::Bevel, + } + } +} diff --git a/wgpu/src/window/backend.rs b/wgpu/src/window/backend.rs index 6f8a0bb0..4c9f289b 100644 --- a/wgpu/src/window/backend.rs +++ b/wgpu/src/window/backend.rs @@ -18,7 +18,11 @@ impl iced_native::window::Backend for Backend { fn new(settings: Self::Settings) -> (Backend, Renderer) { let adapter = wgpu::Adapter::request(&wgpu::RequestAdapterOptions { - power_preference: wgpu::PowerPreference::Default, + power_preference: if settings.antialiasing.is_none() { + wgpu::PowerPreference::Default + } else { + wgpu::PowerPreference::HighPerformance + }, backends: wgpu::BackendBit::all(), }) .expect("Request adapter"); 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