src/main/java/org/saturnclient/impl/ui/SaturnScreenFabric.java

@@ -14,6 +14,12 @@ import net.minecraft.client.gui.CubeMapRenderer;
 import net.minecraft.client.gui.DrawContext;
 import net.minecraft.client.gui.RotatingCubeMapRenderer;
 import net.minecraft.client.gui.screen.Screen;
+//? if >=1.21.6 {
+import net.minecraft.client.texture.CubemapTexture;
+//?} else {
+/*import net.minecraft.client.texture.ResourceTexture;
+import net.minecraft.client.texture.TextureManager;
+*///?}
 //? if >=1.21.9
 import net.minecraft.client.input.KeyInput;
 //? if <1.21.6 {
@@ -21,8 +27,6 @@ import net.minecraft.client.input.KeyInput;
 import net.minecraft.client.render.DefaultFramebufferSet;
 import net.minecraft.client.util.Pool;
 *///?}
-import net.minecraft.client.texture.ResourceTexture;
-import net.minecraft.client.texture.TextureManager;
 import net.minecraft.text.Text;
 import net.minecraft.util.Identifier;
 
@@ -41,14 +45,25 @@ public class SaturnScreenFabric extends Screen implements ScreenProvider {
     //private final Pool pool = new Pool(3);
     public final SaturnScreen screen;
 
+    /** Whether the panorama's textures are loaded; it isn't drawn before (e.g. under the splash). */
+    private static volatile boolean panoramaReady = false;
+
     public static void preload(MinecraftClient client) {
-        TextureManager textureManager = client.getTextureManager();
+        //? if >=1.21.6 {
+        // From 1.21.6 CubeMapRenderer draws from one cube map texture made of panorama_0..5.png.
+        // CubeMapRenderer.registerTextures only stores it for the next resource reload, which has
+        // already happened by now, so register it through the overload that loads it right away.
+        client.getTextureManager().registerTexture(PANORAMA, new CubemapTexture(PANORAMA));
+        //?} else {
+        /*TextureManager textureManager = client.getTextureManager();
         for (int i = 0; i < 6; i++) {
             String var10001 = PANORAMA.getPath();
             Identifier tex = PANORAMA.withPath(var10001 + "_" + i + ".png");
             ResourceTexture resourceTexture = new ResourceTexture(tex);
             textureManager.registerTexture(tex, resourceTexture);
         }
+        *///?}
+        panoramaReady = true;
     }
 
     public SaturnScreenFabric(SaturnScreen screen) {
@@ -74,13 +89,18 @@ public class SaturnScreenFabric extends Screen implements ScreenProvider {
         mouseX *= 2;
         mouseY *= 2;
 
-        // TODO: the panorama and the background blur (screen.backgroundBlur) are only drawn before
-        // 1.21.6 so far. See also issue #23.
-        if (client.world == null && client.getCurrentServerEntry() == null) {
-            //? if <1.21.6
+        // From 1.21.6 the panorama renderer has no opacity (and takes no delta), so it's drawn fully
+        // opaque there.
+        if (panoramaReady && client.world == null && client.getCurrentServerEntry() == null) {
+            //? if >=1.21.6 {
+            ROTATING_PANORAMA_RENDERER.render(context, this.width, this.height, true);
+            //?} else
             //ROTATING_PANORAMA_RENDERER.render(context, this.width, this.height, screen.backgroundOpacity, delta);
         }
 
+        // TODO: the background blur (screen.backgroundBlur) is only drawn before 1.21.6 so far. See
+        // also issue #23.
+
         //? if <1.21.6 {
         /*PostEffectProcessor postEffectProcessor = this.client.getShaderLoader().loadPostEffect(
                 Identifier.ofVanilla("blur"),