uzor_render/
ops.rs

1use crate::context::RenderContext;
2use crate::types::TextAlign;
3
4/// Render instructions that can be serialized
5#[derive(Clone, Debug)]
6pub enum RenderOp {
7    // Style
8    SetStrokeColor(String),
9    SetFillColor(String),
10    SetLineWidth(f64),
11    SetLineDash(Vec<f64>),
12
13    // Path
14    BeginPath,
15    MoveTo(f64, f64),
16    LineTo(f64, f64),
17    QuadraticCurveTo(f64, f64, f64, f64),
18    BezierCurveTo(f64, f64, f64, f64, f64, f64),
19    Arc(f64, f64, f64, f64, f64),
20    Ellipse(f64, f64, f64, f64, f64, f64, f64),
21    ClosePath,
22
23    // Draw
24    Stroke,
25    Fill,
26    StrokeRect(f64, f64, f64, f64),
27    FillRect(f64, f64, f64, f64),
28
29    // Text
30    SetFont(String),
31    SetTextAlign(TextAlign),
32    FillText(String, f64, f64),
33    StrokeText(String, f64, f64),
34
35    // State
36    Save,
37    Restore,
38    Translate(f64, f64),
39    Rotate(f64),
40    Scale(f64, f64),
41    Clip,
42}
43
44/// Collection of render operations
45pub type RenderOps = Vec<RenderOp>;
46
47/// Execute render operations on a context
48pub fn execute_ops(ctx: &mut dyn RenderContext, ops: &[RenderOp]) {
49    for op in ops {
50        match op {
51            RenderOp::SetStrokeColor(c) => ctx.set_stroke_color(c),
52            RenderOp::SetFillColor(c) => ctx.set_fill_color(c),
53            RenderOp::SetLineWidth(w) => ctx.set_stroke_width(*w),
54            RenderOp::SetLineDash(p) => ctx.set_line_dash(p),
55            RenderOp::BeginPath => ctx.begin_path(),
56            RenderOp::MoveTo(x, y) => ctx.move_to(*x, *y),
57            RenderOp::LineTo(x, y) => ctx.line_to(*x, *y),
58            RenderOp::QuadraticCurveTo(cpx, cpy, x, y) => {
59                ctx.quadratic_curve_to(*cpx, *cpy, *x, *y)
60            }
61            RenderOp::BezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y) => {
62                ctx.bezier_curve_to(*cp1x, *cp1y, *cp2x, *cp2y, *x, *y)
63            }
64            RenderOp::Arc(cx, cy, r, start, end) => ctx.arc(*cx, *cy, *r, *start, *end),
65            RenderOp::Ellipse(cx, cy, rx, ry, rot, start, end) => {
66                ctx.ellipse(*cx, *cy, *rx, *ry, *rot, *start, *end)
67            }
68            RenderOp::ClosePath => ctx.close_path(),
69            RenderOp::Stroke => ctx.stroke(),
70            RenderOp::Fill => ctx.fill(),
71            RenderOp::StrokeRect(x, y, w, h) => ctx.stroke_rect(*x, *y, *w, *h),
72            RenderOp::FillRect(x, y, w, h) => ctx.fill_rect(*x, *y, *w, *h),
73            RenderOp::SetFont(f) => ctx.set_font(f),
74            RenderOp::SetTextAlign(a) => ctx.set_text_align(*a),
75            RenderOp::FillText(t, x, y) => ctx.fill_text(t, *x, *y),
76            RenderOp::StrokeText(t, x, y) => ctx.stroke_text(t, *x, *y),
77            RenderOp::Save => ctx.save(),
78            RenderOp::Restore => ctx.restore(),
79            RenderOp::Translate(x, y) => ctx.translate(*x, *y),
80            RenderOp::Rotate(a) => ctx.rotate(*a),
81            RenderOp::Scale(x, y) => ctx.scale(*x, *y),
82            RenderOp::Clip => ctx.clip(),
83        }
84    }
85}
uzor_render/ops.rs

uzor_render/
ops.rs
