diff options
Diffstat (limited to 'graphics/src/primitive.rs')
| -rw-r--r-- | graphics/src/primitive.rs | 176 |
1 files changed, 9 insertions, 167 deletions
diff --git a/graphics/src/primitive.rs b/graphics/src/primitive.rs index 187c6c6c..7592a410 100644 --- a/graphics/src/primitive.rs +++ b/graphics/src/primitive.rs @@ -1,19 +1,15 @@ //! Draw using different graphical primitives. -use crate::color; use crate::core::alignment; use crate::core::image; use crate::core::svg; use crate::core::text; -use crate::core::{Background, Color, Font, Rectangle, Size, Vector}; -use crate::gradient; +use crate::core::{Background, Color, Font, Rectangle, Vector}; -use bytemuck::{Pod, Zeroable}; use std::sync::Arc; /// A rendering primitive. #[derive(Debug, Clone, PartialEq)] -#[non_exhaustive] -pub enum Primitive { +pub enum Primitive<T> { /// A text primitive Text { /// The contents of the text @@ -66,65 +62,17 @@ pub enum Primitive { /// The bounds of the viewport bounds: Rectangle, }, - /// A low-level primitive to render a mesh of triangles with a solid color. - /// - /// It can be used to render many kinds of geometry freely. - SolidMesh { - /// The vertices and indices of the mesh. - buffers: Mesh2D<ColoredVertex2D>, - - /// The size of the drawable region of the mesh. - /// - /// Any geometry that falls out of this region will be clipped. - size: Size, - }, - /// A low-level primitive to render a mesh of triangles with a gradient. - /// - /// It can be used to render many kinds of geometry freely. - GradientMesh { - /// The vertices and indices of the mesh. - buffers: Mesh2D<GradientVertex2D>, - - /// The size of the drawable region of the mesh. - /// - /// Any geometry that falls out of this region will be clipped. - size: Size, - }, - /// A [`tiny_skia`] path filled with some paint. - #[cfg(feature = "tiny-skia")] - Fill { - /// The path to fill. - path: tiny_skia::Path, - /// The paint to use. - paint: tiny_skia::Paint<'static>, - /// The fill rule to follow. - rule: tiny_skia::FillRule, - /// The transform to apply to the path. - transform: tiny_skia::Transform, - }, - /// A [`tiny_skia`] path stroked with some paint. - #[cfg(feature = "tiny-skia")] - Stroke { - /// The path to stroke. - path: tiny_skia::Path, - /// The paint to use. - paint: tiny_skia::Paint<'static>, - /// The stroke settings. - stroke: tiny_skia::Stroke, - /// The transform to apply to the path. - transform: tiny_skia::Transform, - }, /// A group of primitives Group { /// The primitives of the group - primitives: Vec<Primitive>, + primitives: Vec<Primitive<T>>, }, /// A clip primitive Clip { /// The bounds of the clip bounds: Rectangle, /// The content of the clip - content: Box<Primitive>, + content: Box<Primitive<T>>, }, /// A primitive that applies a translation Translate { @@ -132,7 +80,7 @@ pub enum Primitive { translation: Vector, /// The primitive to translate - content: Box<Primitive>, + content: Box<Primitive<T>>, }, /// A cached primitive. /// @@ -140,11 +88,13 @@ pub enum Primitive { /// generation is expensive. Cache { /// The cached primitive - content: Arc<Primitive>, + content: Arc<Primitive<T>>, }, + /// A backend-specific primitive. + Custom(T), } -impl Primitive { +impl<T> Primitive<T> { /// Creates a [`Primitive::Group`]. pub fn group(primitives: Vec<Self>) -> Self { Self::Group { primitives } @@ -165,112 +115,4 @@ impl Primitive { content: Box::new(self), } } - - /// Returns the bounds of the [`Primitive`]. - pub fn bounds(&self) -> Rectangle { - match self { - Self::Text { - bounds, - horizontal_alignment, - vertical_alignment, - .. - } => { - let mut bounds = *bounds; - - bounds.x = match horizontal_alignment { - alignment::Horizontal::Left => bounds.x, - alignment::Horizontal::Center => { - bounds.x - bounds.width / 2.0 - } - alignment::Horizontal::Right => bounds.x - bounds.width, - }; - - bounds.y = match vertical_alignment { - alignment::Vertical::Top => bounds.y, - alignment::Vertical::Center => { - bounds.y - bounds.height / 2.0 - } - alignment::Vertical::Bottom => bounds.y - bounds.height, - }; - - bounds.expand(1.5) - } - Self::Quad { bounds, .. } - | Self::Image { bounds, .. } - | Self::Svg { bounds, .. } => bounds.expand(1.0), - Self::Clip { bounds, .. } => bounds.expand(1.0), - Self::SolidMesh { size, .. } | Self::GradientMesh { size, .. } => { - Rectangle::with_size(*size) - } - #[cfg(feature = "tiny-skia")] - Self::Fill { path, .. } | Self::Stroke { path, .. } => { - let bounds = path.bounds(); - - Rectangle { - x: bounds.x(), - y: bounds.y(), - width: bounds.width(), - height: bounds.height(), - } - .expand(1.0) - } - Self::Group { primitives } => primitives - .iter() - .map(Self::bounds) - .fold(Rectangle::with_size(Size::ZERO), |a, b| { - Rectangle::union(&a, &b) - }), - Self::Translate { - translation, - content, - } => content.bounds() + *translation, - Self::Cache { content } => content.bounds(), - } - } -} - -/// A set of [`Vertex2D`] and indices representing a list of triangles. -#[derive(Clone, Debug, PartialEq, Eq)] -pub struct Mesh2D<T> { - /// The vertices of the mesh - pub vertices: Vec<T>, - - /// 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<u32>, -} - -/// A two-dimensional vertex with a color. -#[derive(Copy, Clone, Debug, PartialEq, Zeroable, Pod)] -#[repr(C)] -pub struct ColoredVertex2D { - /// The vertex position in 2D space. - pub position: [f32; 2], - - /// The color of the vertex in __linear__ RGBA. - pub color: color::Packed, -} - -/// A vertex which contains 2D position & packed gradient data. -#[derive(Copy, Clone, Debug, PartialEq)] -#[repr(C)] -pub struct GradientVertex2D { - /// The vertex position in 2D space. - pub position: [f32; 2], - - /// The packed vertex data of the gradient. - pub gradient: gradient::Packed, -} - -#[allow(unsafe_code)] -unsafe impl Zeroable for GradientVertex2D {} - -#[allow(unsafe_code)] -unsafe impl Pod for GradientVertex2D {} - -impl From<()> for Primitive { - fn from(_: ()) -> Self { - Self::Group { primitives: vec![] } - } } |