fix: correct initial macOS OpenGL framebuffer size

Author: FlashyReese

common/src/main/java/me/flashyreese/mods/sodiumextra/client/util/MacReducedResolution.java

@@ -40,6 +40,10 @@ public static boolean shouldReduceFramebuffer(int framebufferWidth, int framebuf
         return isEnabled() && backend != Backend.OPENGL && isHighDpiFramebuffer(framebufferWidth, framebufferHeight, windowWidth, windowHeight);
     }
 
+    public static boolean shouldUseWindowSizeForInitialFramebuffer() {
+        return isEnabled() && backend == Backend.OPENGL;
+    }
+
     public static GpuSurface.Configuration reduceSurfaceConfiguration(GpuSurface.Configuration config) {
         if (!isEnabled() || backend != Backend.VULKAN || !isHighDpiFramebuffer(config.width(), config.height(), windowWidth, windowHeight)) {
             return config;

common/src/main/java/me/flashyreese/mods/sodiumextra/mixin/reduce_resolution_on_mac/MixinWindow.java

@@ -35,14 +35,27 @@ public class MixinWindow {
 
     @Inject(at = @At(value = "RETURN"), method = "refreshFramebufferSize")
     private void afterUpdateFrameBufferSize(CallbackInfo ci) {
-        this.scaleFramebufferSize();
+        this.scaleInitialFramebufferSize();
     }
 
     @Inject(method = "onFramebufferResize", at = @At(value = "FIELD", target = "Lcom/mojang/blaze3d/platform/Window;framebufferHeight:I", opcode = Opcodes.PUTFIELD, shift = At.Shift.AFTER))
     private void afterFramebufferResize(long handle, int newWidth, int newHeight, CallbackInfo ci) {
         this.scaleFramebufferSize();
     }
 
+    @Unique
+    private void scaleInitialFramebufferSize() {
+        MacReducedResolution.rememberWindowSize(this.width, this.height);
+
+        if (MacReducedResolution.shouldUseWindowSizeForInitialFramebuffer()) {
+            this.framebufferWidth = Math.max(1, this.width);
+            this.framebufferHeight = Math.max(1, this.height);
+            return;
+        }
+
+        this.scaleFramebufferSize();
+    }
+
     @Unique
     private void scaleFramebufferSize() {
         MacReducedResolution.rememberWindowSize(this.width, this.height);