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https://github.com/italicsjenga/vello.git
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18c0da02e5
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.
41 lines
1.1 KiB
GLSL
41 lines
1.1 KiB
GLSL
// SPDX-License-Identifier: Apache-2.0 OR MIT OR Unlicense
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#import config
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#import drawtag
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@group(0) @binding(0)
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var<storage> config: Config;
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@group(0) @binding(1)
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var<storage> scene: array<u32>;
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@group(0) @binding(2)
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var<storage, read_write> reduced: array<DrawMonoid>;
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let WG_SIZE = 256u;
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var<workgroup> sh_scratch: array<DrawMonoid, WG_SIZE>;
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@compute @workgroup_size(256)
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fn main(
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@builtin(global_invocation_id) global_id: vec3<u32>,
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@builtin(local_invocation_id) local_id: vec3<u32>,
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) {
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let ix = global_id.x;
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let tag_word = scene[config.drawtag_base + ix];
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var agg = map_draw_tag(tag_word);
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sh_scratch[local_id.x] = agg;
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for (var i = 0u; i < firstTrailingBit(WG_SIZE); i += 1u) {
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workgroupBarrier();
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if local_id.x + (1u << i) < WG_SIZE {
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let other = sh_scratch[local_id.x + (1u << i)];
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agg = combine_draw_monoid(agg, other);
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}
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workgroupBarrier();
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sh_scratch[local_id.x] = agg;
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}
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if local_id.x == 0u {
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reduced[ix >> firstTrailingBit(WG_SIZE)] = agg;
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}
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}
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