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// wearechat - generic multiplayer game with voip
// Copyright (C) 2025 metamuffin
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, version 3 of the License only.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
struct VertexOut {
@builtin(position) clip: vec4<f32>,
@location(0) texcoord: vec2<f32>,
};
@group(0) @binding(0) var texture: texture_2d<f32>;
@group(0) @binding(1) var texture_sampler: sampler;
@vertex
fn vs_main(@builtin(vertex_index) vertex_index: u32) -> VertexOut {
let x = i32(vertex_index) / 2;
let y = i32(vertex_index) & 1;
return VertexOut(
vec4<f32>(f32(x) * 4.0 - 1.0, 1.0 - f32(y) * 4.0, 0.0, 1.0),
vec2<f32>(f32(x) * 2.0, f32(y) * 2.0)
);
}
@fragment
fn fs_main(vertex: VertexOut) -> @location(0) vec4<f32> {
return textureSample(texture, texture_sampler, vertex.texcoord);
}
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