narui_core 0.1.2

unwrapped core crate of the narui gui framework
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156

use crate::{
    eval::layout::{PositionedElement, RenderObjectOrSubPass},
    geom::Vec2,
    re_export::lyon::lyon_tessellation::{Count, GeometryBuilderError, VertexId},
    vulkano_render::primitive_renderer::RenderData,
    Color,
    RenderObject,
};
use lyon::{
    lyon_tessellation::{FillTessellator, FillVertex},
    tessellation::{
        FillGeometryBuilder,
        GeometryBuilder,
        StrokeGeometryBuilder,
        StrokeTessellator,
        StrokeVertex,
    },
};
use palette::Pixel;


pub struct ColoredBuffersBuilder<'a> {
    data: &'a mut RenderData,
    pos: Vec2,
    z_index: f32,
    clip_min: [f32; 2],
    clip_max: [f32; 2],
}
impl<'a> ColoredBuffersBuilder<'a> {
    pub fn with_color(&mut self, color: Color) -> NaruiGeometryBuilder {
        NaruiGeometryBuilder::new(
            self.data,
            self.pos,
            self.z_index,
            color.into_raw::<[f32; 4]>(),
            self.clip_min,
            self.clip_max,
        )
    }
}

pub struct NaruiGeometryBuilder<'a> {
    primitive_index: u32,
    position: Vec2,
    data: &'a mut RenderData,
    vertex_offset: u32,
    index_offset: u32,
}

impl<'a> NaruiGeometryBuilder<'a> {
    fn new(
        data: &'a mut RenderData,
        position: Vec2,
        z_index: f32,
        color: [f32; 4],
        clip_min: [f32; 2],
        clip_max: [f32; 2],
    ) -> Self {
        Self {
            primitive_index: data.add_lyon_data(color, z_index, clip_min, clip_max),
            position,
            data,
            vertex_offset: 0,
            index_offset: 0,
        }
    }
}

impl<'a> GeometryBuilder for NaruiGeometryBuilder<'a> {
    fn begin_geometry(&mut self) {
        self.vertex_offset = self.data.vertices.len() as _;
        self.index_offset = self.data.indices.len() as _;
    }

    fn end_geometry(&mut self) -> Count {
        Count {
            vertices: self.data.vertices.len() as u32 - self.vertex_offset,
            indices: self.data.indices.len() as u32 - self.index_offset,
        }
    }

    fn add_triangle(&mut self, a: VertexId, b: VertexId, c: VertexId) {
        self.data.indices.push(a.0);
        self.data.indices.push(b.0);
        self.data.indices.push(c.0);
    }

    fn abort_geometry(&mut self) {
        self.data.vertices.truncate(self.vertex_offset as usize);
        self.data.indices.truncate(self.index_offset as usize);
    }
}

impl<'a> FillGeometryBuilder for NaruiGeometryBuilder<'a> {
    fn add_fill_vertex(&mut self, vertex: FillVertex) -> Result<VertexId, GeometryBuilderError> {
        Ok(self
            .data
            .add_lyon_vertex(
                self.primitive_index,
                [self.position.x + vertex.position().x, self.position.y + vertex.position().y],
            )
            .into())
    }
}

impl<'a> StrokeGeometryBuilder for NaruiGeometryBuilder<'a> {
    fn add_stroke_vertex(
        &mut self,
        vertex: StrokeVertex,
    ) -> Result<VertexId, GeometryBuilderError> {
        Ok(self
            .data
            .add_lyon_vertex(
                self.primitive_index,
                [self.position.x + vertex.position().x, self.position.y + vertex.position().y],
            )
            .into())
    }
}

pub struct Lyon {
    fill_tessellator: FillTessellator,
    stroke_tessellator: StrokeTessellator,
}
impl Lyon {
    pub fn new() -> Self {
        Self {
            fill_tessellator: FillTessellator::new(),
            stroke_tessellator: StrokeTessellator::new(),
        }
    }
    pub fn render<'a>(&mut self, data: &mut RenderData, render_object: &PositionedElement<'a>) {
        let clipping_rect = if let Some(clipping_rect) = render_object.clipping_rect {
            render_object.rect.clip(clipping_rect)
        } else {
            render_object.rect
        };

        if let RenderObjectOrSubPass::RenderObject(RenderObject::Path { path_gen }) =
            render_object.element
        {
            (path_gen)(
                render_object.rect.size,
                &mut self.fill_tessellator,
                &mut self.stroke_tessellator,
                ColoredBuffersBuilder {
                    data,
                    pos: render_object.rect.pos,
                    z_index: 1.0 - render_object.z_index as f32 / 65535.0,
                    clip_min: clipping_rect.near_corner().into(),
                    clip_max: clipping_rect.far_corner().into(),
                },
            );
        };
    }
}