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005_fill_trapezoid.zig
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005_fill_trapezoid.zig
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// SPDX-License-Identifier: 0BSD
// Copyright © 2024 Chris Marchesi
//! Case: Renders and fills a trapezoid on a 300x300 surface.
const debug = @import("std").debug;
const mem = @import("std").mem;
const z2d = @import("z2d");
pub const filename = "005_fill_trapezoid";
pub fn render(alloc: mem.Allocator, aa_mode: z2d.options.AntiAliasMode) !z2d.Surface {
const width = 300;
const height = 300;
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();
const margin_top = 89;
const margin_bottom = 50;
const margin_y = 100;
try path.moveTo(0 + margin_top, 0 + margin_y);
try path.lineTo(width - margin_top - 1, 0 + margin_y);
try path.lineTo(width - margin_bottom - 1, height - margin_y - 1);
try path.lineTo(0 + margin_bottom, height - margin_y - 1);
try path.close();
try context.fill(alloc, path);
return sfc;
}