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5851ef1417
This checkpoint loads the shaders for full rendering, but there's a bunch of stuff still needing to be done.
55 lines
1.6 KiB
GLSL
55 lines
1.6 KiB
GLSL
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Also licensed under MIT license, at your choice.
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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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