From b49ee81df9d285d08ef6bf834c6e14c5064b4070 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Thu, 10 Aug 2023 14:34:31 +0200
Subject: [PATCH] Disable OpenGL ANGLE backend.

Currently ANGLE can work through desktop OpenGL only with enabled
attribute EGL_SURFACE_ORIENTATION_INVERT_Y_ANGLE.

Qt can't work with it enabled and shows vertically flipped content.
---
 ui/gl/gl_detection.cpp | 6 +++---
 ui/gl/gl_detection.h   | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/ui/gl/gl_detection.cpp b/ui/gl/gl_detection.cpp
index e200e9c..3d2a542 100644
--- a/ui/gl/gl_detection.cpp
+++ b/ui/gl/gl_detection.cpp
@@ -33,7 +33,7 @@ namespace {
 bool ForceDisabled/* = false*/;
 
 #ifdef Q_OS_WIN
-ANGLE ResolvedANGLE = ANGLE::Auto;
+ANGLE ResolvedANGLE/* = ANGLE::Auto*/;
 #endif // Q_OS_WIN
 
 base::options::toggle AllowLinuxNvidiaOpenGL({
@@ -247,7 +247,7 @@ void ConfigureANGLE() {
 			qputenv("DESKTOP_APP_QT_ANGLE_PLATFORM", backend);
 		}
 	};
-	check("gl", ANGLE::OpenGL);
+	//check("gl", ANGLE::OpenGL);
 	check("d3d9", ANGLE::D3D9);
 	check("d3d11", ANGLE::D3D11);
 	check("d3d11on12", ANGLE::D3D11on12);
@@ -272,7 +272,7 @@ void ChangeANGLE(ANGLE backend) {
 	case ANGLE::D3D9: write("d3d9"); break;
 	case ANGLE::D3D11: write("d3d11"); break;
 	case ANGLE::D3D11on12: write("d3d11on12"); break;
-	case ANGLE::OpenGL: write("gl"); break;
+	//case ANGLE::OpenGL: write("gl"); break;
 	default: Unexpected("ANGLE backend value.");
 	}
 }
diff --git a/ui/gl/gl_detection.h b/ui/gl/gl_detection.h
index 862be90..8ea77be 100644
--- a/ui/gl/gl_detection.h
+++ b/ui/gl/gl_detection.h
@@ -38,7 +38,7 @@ enum class ANGLE {
 	D3D9,
 	D3D11,
 	D3D11on12,
-	OpenGL,
+	//OpenGL,
 };
 
 void ConfigureANGLE(); // Requires Ui::Integration being set.