vello/piet-wgsl/shader/bbox_clear.wgsl
Elias Naur 18c0da02e5
Clarify licensing for WGSL shaders (#205)
As stated by the README, the intention is for the shaders to be
provided under the terms of the Unlicense in addition to the MIT
and Apache-2.0 licenses.

While here, add a self-contained UNLICENSE file to replace the
external reference to unlicense.org.
2022-11-19 16:45:42 +00:00

32 lines
646 B
GLSL

// SPDX-License-Identifier: Apache-2.0 OR MIT OR Unlicense
#import config
@group(0) @binding(0)
var<storage> config: Config;
struct PathBbox {
x0: i32,
y0: i32,
x1: i32,
y1: i32,
linewidth: f32,
trans_ix: u32,
}
@group(0) @binding(1)
var<storage, read_write> path_bboxes: array<PathBbox>;
@compute @workgroup_size(256)
fn main(
@builtin(global_invocation_id) global_id: vec3<u32>,
) {
let ix = global_id.x;
if ix < config.n_path {
path_bboxes[ix].x0 = 0x7fffffff;
path_bboxes[ix].y0 = 0x7fffffff;
path_bboxes[ix].x1 = -0x80000000;
path_bboxes[ix].y1 = -0x80000000;
}
}