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Diffstat (limited to 'wgpu/src/widget/canvas/frame.rs')
| -rw-r--r-- | wgpu/src/widget/canvas/frame.rs | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/wgpu/src/widget/canvas/frame.rs b/wgpu/src/widget/canvas/frame.rs deleted file mode 100644 index 5262ab4e..00000000 --- a/wgpu/src/widget/canvas/frame.rs +++ /dev/null @@ -1,367 +0,0 @@ -use iced_native::{Point, Rectangle, Size, Vector}; - -use crate::{ - canvas::{Fill, Geometry, Path, Stroke, Text}, - triangle, Primitive, -}; - -/// The frame of a [`Canvas`]. -/// -/// [`Canvas`]: struct.Canvas.html -#[derive(Debug)] -pub struct Frame { - size: Size, - buffers: lyon::tessellation::VertexBuffers<triangle::Vertex2D, u32>, - primitives: Vec<Primitive>, - 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(size: Size) -> Frame { - Frame { - size, - buffers: lyon::tessellation::VertexBuffers::new(), - primitives: Vec::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.size.width - } - - /// Returns the width of the [`Frame`]. - /// - /// [`Frame`]: struct.Frame.html - #[inline] - pub fn height(&self) -> f32 { - self.size.height - } - - /// Returns the dimensions of the [`Frame`]. - /// - /// [`Frame`]: struct.Frame.html - #[inline] - pub fn size(&self) -> Size { - self.size - } - - /// Returns the coordinate of the center of the [`Frame`]. - /// - /// [`Frame`]: struct.Frame.html - #[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. - /// - /// [`Path`]: path/struct.Path.html - /// [`Frame`]: struct.Frame.html - pub fn fill(&mut self, path: &Path, fill: impl Into<Fill>) { - use lyon::tessellation::{ - BuffersBuilder, FillOptions, FillTessellator, - }; - - let mut buffers = BuffersBuilder::new( - &mut self.buffers, - FillVertex(match fill.into() { - 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 an axis-aligned rectangle given its top-left corner coordinate and - /// its `Size` on the [`Frame`] by filling it with the provided style. - /// - /// [`Frame`]: struct.Frame.html - pub fn fill_rectangle( - &mut self, - top_left: Point, - size: Size, - fill: impl Into<Fill>, - ) { - use lyon::tessellation::{BuffersBuilder, FillOptions}; - - let mut buffers = BuffersBuilder::new( - &mut self.buffers, - FillVertex(match fill.into() { - Fill::Color(color) => color.into_linear(), - }), - ); - - let top_left = - self.transforms.current.raw.transform_point( - lyon::math::Point::new(top_left.x, top_left.y), - ); - - let size = - self.transforms.current.raw.transform_vector( - lyon::math::Vector::new(size.width, size.height), - ); - - let _ = lyon::tessellation::basic_shapes::fill_rectangle( - &lyon::math::Rect::new(top_left, size.into()), - &FillOptions::default(), - &mut buffers, - ) - .expect("Fill rectangle"); - } - - /// 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: impl Into<Stroke>) { - use lyon::tessellation::{ - BuffersBuilder, StrokeOptions, StrokeTessellator, - }; - - let stroke = stroke.into(); - - 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"); - } - - /// 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. - /// - /// [`Text`]: struct.Text.html - /// [`Frame`]: struct.Frame.html - /// [`Canvas`]: struct.Canvas.html - pub fn fill_text(&mut self, text: impl Into<Text>) { - use std::f32; - - let text = text.into(); - - let position = if self.transforms.current.is_identity { - text.position - } else { - let transformed = self.transforms.current.raw.transform_point( - lyon::math::Point::new(text.position.x, text.position.y), - ); - - Point::new(transformed.x, transformed.y) - }; - - // TODO: Use vectorial text instead of primitive - self.primitives.push(Primitive::Text { - content: text.content, - bounds: Rectangle { - x: position.x, - y: position.y, - width: f32::INFINITY, - height: f32::INFINITY, - }, - color: text.color, - size: text.size, - font: text.font, - horizontal_alignment: text.horizontal_alignment, - vertical_alignment: text.vertical_alignment, - }); - } - - /// 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`] representing everything drawn on the [`Frame`]. - /// - /// [`Frame`]: struct.Frame.html - /// [`Geometry`]: struct.Geometry.html - pub fn into_geometry(mut self) -> Geometry { - if !self.buffers.indices.is_empty() { - self.primitives.push(Primitive::Mesh2D { - size: self.size, - buffers: triangle::Mesh2D { - vertices: self.buffers.vertices, - indices: self.buffers.indices, - }, - }); - } - - Geometry::from_primitive(Primitive::Group { - primitives: self.primitives, - }) - } -} - -struct FillVertex([f32; 4]); - -impl lyon::tessellation::BasicVertexConstructor<triangle::Vertex2D> - for FillVertex -{ - fn new_vertex( - &mut self, - position: lyon::math::Point, - ) -> triangle::Vertex2D { - triangle::Vertex2D { - position: [position.x, position.y], - color: self.0, - } - } -} - -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, - } - } -} |