From ecdef7f7537bbc9d76a7938fbd8cd74f7b4da5bf Mon Sep 17 00:00:00 2001
From: Sebastian Krzyszkowiak <dos@dosowisko.net>
Date: Sat, 7 Nov 2026 12:33:22 +0100
Subject: [PATCH] opengl*renderer: Show an empty frame early (#233)

Gives a better feedback to the user that something has actually launched.
---
 rendering/opengl33renderer.cpp | 4 ++++
 rendering/openglrenderer.cpp   | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/rendering/opengl33renderer.cpp b/rendering/opengl33renderer.cpp
index 76750472d..5c64988b4 100644
--- a/rendering/opengl33renderer.cpp
+++ b/rendering/opengl33renderer.cpp
@@ -104,6 +104,10 @@ bool opengl33_renderer::Init(GLFWwindow *Window)
         glDebugMessageCallback( ErrorCallback, 0 );
     }
 
+	glClearColor( 0.f, 0.f, 0.f, 1.f );
+	glClear( GL_COLOR_BUFFER_BIT );
+	glfwSwapBuffers( Window );
+
 	if (!Init_caps())
 		return false;
 
diff --git a/rendering/openglrenderer.cpp b/rendering/openglrenderer.cpp
index 7516f5a22..ef54f32c9 100644
--- a/rendering/openglrenderer.cpp
+++ b/rendering/openglrenderer.cpp
@@ -75,6 +75,10 @@ float const EU07_OPACITYDEFAULT { 0.5f };
 bool
 opengl_renderer::Init( GLFWwindow *Window ) {
 
+    glClearColor( 0.f, 0.f, 0.f, 1.f );
+    glClear( GL_COLOR_BUFFER_BIT );
+    glfwSwapBuffers( Window );
+
     if( false == Init_caps() ) { return false; }
 
     m_window = Window;