From 681cd27fd50ae62c36773c22e1622e87e52bd535 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A1=D0=B5=D1=80=D0=B3=D0=B5=D0=B9=20=D0=AE=2E=20=D0=94?=
 =?UTF-8?q?=D0=B8=D0=BD=D0=B4=D0=B8=D0=BA=D0=BE=D0=B2?=
 <C:\UTILITY\The Bat!\Mail>
Date: Fri, 10 Jul 2026 15:46:43 +0300
Subject: [PATCH] enable DXIL compilation for DX12 backend

---
 gui_windows.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gui_windows.go b/gui_windows.go
index a8e8968..0918889 100644
--- a/gui_windows.go
+++ b/gui_windows.go
@@ -3,6 +3,7 @@
 package main
 
 import (
+	"os"
 	"strings"
 
 	"github.com/unxed/vtui"
@@ -12,6 +13,14 @@ func RunGui(backend string) error {
 	if backend == "qt" || strings.HasPrefix(backend, "ext:") {
 		return RunExternalUIWithMapping(backend)
 	}
+	// DX12: use naga DXIL backend instead of HLSL→FXC
+	// to avoid 2-6s shader compilation via d3dcompiler_47.dll
+	if os.Getenv("GOGPU_DX12_DXIL") == "" {
+		api := os.Getenv("GOGPU_GRAPHICS_API")
+		if api == "" || strings.EqualFold(api, "dx12") || strings.EqualFold(api, "d3d12") || strings.EqualFold(api, "directx") {
+			os.Setenv("GOGPU_DX12_DXIL", "1")
+		}
+	}
 	return vtui.RunInGUIWindow(100, 30, backend, func() {
 		SetupUI()
 	})