From f42a343e85c90a86140664a5974b5266dcf3fa55 Mon Sep 17 00:00:00 2001
From: Samuliak <samuliak77@gmail.com>
Date: Sat, 6 Jul 2024 09:59:35 +0200
Subject: [PATCH] add: comment

---
 src/host_shaders/metal_copy_to_lut_texture.metal | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/host_shaders/metal_copy_to_lut_texture.metal b/src/host_shaders/metal_copy_to_lut_texture.metal
index 1c996516..ef993b64 100644
--- a/src/host_shaders/metal_copy_to_lut_texture.metal
+++ b/src/host_shaders/metal_copy_to_lut_texture.metal
@@ -3,6 +3,7 @@ using namespace metal;
 
 constant ushort lutTextureWidth [[function_constant(0)]];
 
+// The copy is done in a vertex shader instead of a compute kernel, since dispatching compute would require ending the render pass
 vertex void vertexCopyToLutTexture(uint vid [[vertex_id]], texture1d_array<ushort, access::write> out [[texture(0)]], constant ushort* data [[buffer(0)]]) {
     out.write(data[vid], vid % lutTextureWidth, vid / lutTextureWidth);
 }