From 7864f83c4d2372ca798a355c3f8d65b53523e489 Mon Sep 17 00:00:00 2001
From: unknown <81806010+marsej@users.noreply.github.com>
Date: Tue, 7 Dec 2021 16:39:37 +0200
Subject: [PATCH 1/2] Changed SDL initial bg color from white to black to
 remove white flash effect with some GPUs

---
 BeefLibs/SDL2/src/SDLApp.bf | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/BeefLibs/SDL2/src/SDLApp.bf b/BeefLibs/SDL2/src/SDLApp.bf
index cc95a8dd..01535fe8 100644
--- a/BeefLibs/SDL2/src/SDLApp.bf
+++ b/BeefLibs/SDL2/src/SDLApp.bf
@@ -117,8 +117,12 @@ namespace SDL2
 			SDL.EventState(.JoyDeviceAdded, .Disable);
 			SDL.EventState(.JoyDeviceRemoved, .Disable);
 
-			mWindow = SDL.CreateWindow(mTitle, .Undefined, .Undefined, mWidth, mHeight, .Shown);
+			mWindow = SDL.CreateWindow(mTitle, .Undefined, .Undefined, mWidth, mHeight, .Hidden);
 			mRenderer = SDL.CreateRenderer(mWindow, -1, .Accelerated);
+			SDL.ShowWindow(mWindow);
+			SDL.SetRenderDrawColor(mRenderer, 0, 0, 0, 255);
+			SDL.RenderClear(mRenderer);
+			SDL.RenderPresent(mRenderer);
 			mScreen = SDL.GetWindowSurface(mWindow);
 			SDLImage.Init(.PNG | .JPG);
 			mHasAudio = SDLMixer.OpenAudio(44100, SDLMixer.MIX_DEFAULT_FORMAT, 2, 4096) >= 0;

From b8e07788073505aa199593ecf4ea790a0b9a68cb Mon Sep 17 00:00:00 2001
From: unknown <81806010+marsej@users.noreply.github.com>
Date: Sun, 19 Dec 2021 04:18:57 +0200
Subject: [PATCH 2/2] Delay ShowWindow until after first render

---
 BeefLibs/SDL2/src/SDLApp.bf | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/BeefLibs/SDL2/src/SDLApp.bf b/BeefLibs/SDL2/src/SDLApp.bf
index 01535fe8..65c042d4 100644
--- a/BeefLibs/SDL2/src/SDLApp.bf
+++ b/BeefLibs/SDL2/src/SDLApp.bf
@@ -117,12 +117,8 @@ namespace SDL2
 			SDL.EventState(.JoyDeviceAdded, .Disable);
 			SDL.EventState(.JoyDeviceRemoved, .Disable);
 
-			mWindow = SDL.CreateWindow(mTitle, .Undefined, .Undefined, mWidth, mHeight, .Hidden);
+			mWindow = SDL.CreateWindow(mTitle, .Undefined, .Undefined, mWidth, mHeight, .Hidden); // Initially hide window
 			mRenderer = SDL.CreateRenderer(mWindow, -1, .Accelerated);
-			SDL.ShowWindow(mWindow);
-			SDL.SetRenderDrawColor(mRenderer, 0, 0, 0, 255);
-			SDL.RenderClear(mRenderer);
-			SDL.RenderPresent(mRenderer);
 			mScreen = SDL.GetWindowSurface(mWindow);
 			SDLImage.Init(.PNG | .JPG);
 			mHasAudio = SDLMixer.OpenAudio(44100, SDLMixer.MIX_DEFAULT_FORMAT, 2, 4096) >= 0;
@@ -249,7 +245,9 @@ namespace SDL2
 				if (curPhysTickCount == 0)
 				{
 					// Initial render
-					Render();
+					Render();                
+					// Show initially hidden window, mitigates white flash on slow startups
+					SDL.ShowWindow(mWindow); 
 				}
 				else
 				{