-
Notifications
You must be signed in to change notification settings - Fork 0
/
013_fill_combined.zig
86 lines (72 loc) · 3.27 KB
/
013_fill_combined.zig
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
// SPDX-License-Identifier: 0BSD
// Copyright © 2024 Chris Marchesi
//! Case: Renders and fills multiple shapes using a single path operation, used
//! to ensure we can do this without having to fill each polygon individually.
const debug = @import("std").debug;
const mem = @import("std").mem;
const z2d = @import("z2d");
pub const filename = "013_fill_combined";
pub fn render(alloc: mem.Allocator, aa_mode: z2d.options.AntiAliasMode) !z2d.Surface {
const width = 600;
const height = 400;
const sfc = try z2d.Surface.init(.image_surface_rgb, alloc, width, height);
var context: z2d.Context = .{
.surface = sfc,
.pattern = .{
.opaque_pattern = .{
.pixel = .{ .rgb = .{ .r = 0xFF, .g = 0xFF, .b = 0xFF } }, // White on black
},
},
.anti_aliasing_mode = aa_mode,
};
var path = z2d.Path.init(alloc);
defer path.deinit();
// sub-canvas dimensions
const sub_canvas_width = width / 3;
const sub_canvas_height = height / 2;
// Triangle
comptime var margin = 10;
try path.moveTo(0 + margin, 0 + margin);
try path.lineTo(sub_canvas_width - margin - 1, 0 + margin);
try path.lineTo(sub_canvas_width / 2 - 1, sub_canvas_height - margin - 1);
try path.close();
// Square
margin = 50;
comptime var x_offset = sub_canvas_width;
try path.moveTo(x_offset + margin, 0 + margin);
try path.lineTo(x_offset + sub_canvas_width - margin - 1, 0 + margin);
try path.lineTo(x_offset + sub_canvas_width - margin - 1, sub_canvas_height - margin - 1);
try path.lineTo(x_offset + margin, sub_canvas_height - margin - 1);
try path.close();
// Trapezoid
const trapezoid_margin_top = 59;
const trapezoid_margin_bottom = 33;
const trapezoid_margin_y = 66;
x_offset = sub_canvas_width * 2;
try path.moveTo(x_offset + trapezoid_margin_top, 0 + trapezoid_margin_y);
try path.lineTo(x_offset + sub_canvas_width - trapezoid_margin_top - 1, 0 + trapezoid_margin_y);
try path.lineTo(x_offset + sub_canvas_width - trapezoid_margin_bottom - 1, sub_canvas_height - trapezoid_margin_y - 1);
try path.lineTo(x_offset + trapezoid_margin_bottom, sub_canvas_height - trapezoid_margin_y - 1);
try path.close();
// Star
margin = 13;
const x_scale = 3;
const y_scale = 5;
x_offset = width / 6;
const y_offset = sub_canvas_height;
// With all 5 points numbered 1-5 clockwise, we draw odds first (1, 3, 5),
// then evens (4, 2), with the close connecting 4 and 1.
try path.moveTo(x_offset + sub_canvas_width / 2, y_offset + margin); // 1
try path.lineTo(x_offset + sub_canvas_width - margin * x_scale - 1, y_offset + sub_canvas_height - margin - 1); // 3
try path.lineTo(x_offset + margin, y_offset + margin * y_scale); // 5
try path.lineTo(x_offset + sub_canvas_width - margin - 1, y_offset + margin * y_scale); // 2
try path.lineTo(x_offset + margin * x_scale, y_offset + sub_canvas_height - margin - 1); // 4
try path.close();
// Bezier
x_offset += sub_canvas_width;
try path.moveTo(x_offset + 12, y_offset + 166);
try path.curveTo(x_offset + 59, y_offset + 32, x_offset + 139, y_offset + 32, x_offset + 186, y_offset + 166);
try path.close();
try context.fill(alloc, path);
return sfc;
}