From 5248831232fa22a1f3d6515f7f6c7bee8994faf2 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Mon, 21 Nov 2022 16:59:50 +0100
Subject: unify repos

---
 vgcodec/src/diff.wgsl | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 vgcodec/src/diff.wgsl

(limited to 'vgcodec/src/diff.wgsl')

diff --git a/vgcodec/src/diff.wgsl b/vgcodec/src/diff.wgsl
new file mode 100644
index 0000000..bb5a3e1
--- /dev/null
+++ b/vgcodec/src/diff.wgsl
@@ -0,0 +1,17 @@
+@group(0) @binding(0) 
+var tex_a: texture_2d<f32>;
+@group(0) @binding(1) 
+var tex_b: texture_2d<f32>;
+
+@group(0) @binding(2)
+var<storage, read_write> exp: atomic<u32>;
+
+@compute @workgroup_size(1)
+fn main(@builtin(global_invocation_id) global_id: vec3<u32>) {
+    var col_a = textureLoad(tex_a, vec2(i32(global_id.x), i32(global_id.y)), 0);
+    var col_b = textureLoad(tex_b, vec2(i32(global_id.x), i32(global_id.y)), 0);
+    var diff = col_a - col_b;
+    var diffsum = diff.r + diff.g + diff.b;
+    atomicAdd(&exp, u32(diffsum));
+}
+
-- 
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