darkly 0.5.0

A GPU-native paint engine on wgpu: brushes, layers, blend modes, masks, selections, and undo.
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

//! View transform, canvas resize / rescale / crop, and canvas dimension queries.

use serde::Deserialize;

use crate::engine::protocol::{decode, RequestRegistration, Response};

pub fn registrations() -> Vec<RequestRegistration> {
    vec![
        RequestRegistration {
            kind: "set_view_transform",
            handle: |engine, payload, _b| {
                #[derive(Deserialize)]
                struct Req {
                    pan_x: f32,
                    pan_y: f32,
                    zoom: f32,
                    rotation: f32,
                    mirror_h: bool,
                    screen_w: f32,
                    screen_h: f32,
                }
                let r: Req = decode(payload)?;
                engine.set_view_transform(
                    r.pan_x, r.pan_y, r.zoom, r.rotation, r.mirror_h, r.screen_w, r.screen_h,
                );
                Ok(Response::empty())
            },
        },
        RequestRegistration {
            kind: "resize",
            handle: |engine, payload, _b| {
                #[derive(Deserialize)]
                struct Req {
                    width: u32,
                    height: u32,
                }
                let r: Req = decode(payload)?;
                engine.resize(r.width, r.height);
                Ok(Response::empty())
            },
        },
        RequestRegistration {
            kind: "resize_canvas_rect",
            handle: |engine, payload, _b| {
                #[derive(Deserialize)]
                struct Req {
                    origin_x: i32,
                    origin_y: i32,
                    w: u32,
                    h: u32,
                }
                let r: Req = decode(payload)?;
                let rect = crate::coord::CanvasRect::new(
                    crate::coord::CanvasPoint::new(r.origin_x, r.origin_y),
                    r.w,
                    r.h,
                );
                engine.resize_canvas(rect);
                Ok(Response::empty())
            },
        },
        RequestRegistration {
            kind: "crop_to_selection",
            handle: |engine, _payload, _b| {
                engine.crop_to_selection();
                Ok(Response::empty())
            },
        },
        RequestRegistration {
            kind: "rescale_image",
            handle: |engine, payload, _b| {
                #[derive(Deserialize)]
                struct Req {
                    w: u32,
                    h: u32,
                }
                let r: Req = decode(payload)?;
                engine.rescale_image(r.w, r.h);
                Ok(Response::empty())
            },
        },
        RequestRegistration {
            kind: "flip_canvas",
            handle: |engine, payload, _b| {
                #[derive(Deserialize)]
                #[serde(rename_all = "lowercase")]
                enum Axis {
                    H,
                    V,
                }
                #[derive(Deserialize)]
                struct Req {
                    axis: Axis,
                }
                let r: Req = decode(payload)?;
                engine.transform_canvas(match r.axis {
                    Axis::H => crate::gpu::ortho_transform::OrthoXform::FlipH,
                    Axis::V => crate::gpu::ortho_transform::OrthoXform::FlipV,
                });
                Ok(Response::empty())
            },
        },
        RequestRegistration {
            kind: "rotate_canvas",
            handle: |engine, payload, _b| {
                #[derive(Deserialize)]
                #[serde(rename_all = "lowercase")]
                enum Dir {
                    Cw,
                    Ccw,
                    #[serde(rename = "180")]
                    Half,
                }
                #[derive(Deserialize)]
                struct Req {
                    dir: Dir,
                }
                let r: Req = decode(payload)?;
                engine.transform_canvas(match r.dir {
                    Dir::Cw => crate::gpu::ortho_transform::OrthoXform::Rot90Cw,
                    Dir::Ccw => crate::gpu::ortho_transform::OrthoXform::Rot90Ccw,
                    Dir::Half => crate::gpu::ortho_transform::OrthoXform::Rot180,
                });
                Ok(Response::empty())
            },
        },
        RequestRegistration {
            kind: "canvas_dimensions",
            handle: |engine, _payload, _b| {
                let (width, height) = engine.canvas_dimensions();
                Ok(Response::json(serde_json::json!({
                    "width": width,
                    "height": height,
                })))
            },
        },
        RequestRegistration {
            kind: "canvas_rect",
            handle: |engine, _payload, _b| {
                let r = engine.canvas_rect();
                Ok(Response::json(serde_json::json!({
                    "origin_x": r.origin.x,
                    "origin_y": r.origin.y,
                    "width": r.width,
                    "height": r.height,
                })))
            },
        },
    ]
}