SDL: Fixed runaway CPU usage in the metal renderer when the window is minimized

SDL Commits
1 
From 82b40f097b0263837292763c36d4b6a6423e1548 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Fri, 16 Sep 2022 09:55:20 -0700
Subject: [PATCH] Fixed runaway CPU usage in the metal renderer when the window
 is minimized

---
 src/render/metal/SDL_render_metal.m | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/render/metal/SDL_render_metal.m b/src/render/metal/SDL_render_metal.m
index 05328902204..3dc346d57e4 100644
--- a/src/render/metal/SDL_render_metal.m
+++ b/src/render/metal/SDL_render_metal.m
@@ -503,10 +503,6 @@ @implementation METAL_TextureData
 static void
 METAL_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
 {
-    if (event->event == SDL_WINDOWEVENT_SHOWN ||
-        event->event == SDL_WINDOWEVENT_HIDDEN) {
-        // !!! FIXME: write me
-    }
 }
 
 static int
@@ -1529,7 +1525,7 @@ @implementation METAL_TextureData
     data.mtlcmdbuffer = nil;
     data.mtlbackbuffer = nil;
 
-    if (!ready) {
+    if (renderer->hidden || !ready) {
         return -1;
     }
     return 0;