hle: nvflinger: Move PixelFormat to its own header.

src/core/hle/service/nvflinger/pixel_format.h

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright 2021 yuzu Emulator Project
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace android {
+
+enum class PixelFormat : u32 {
+    NoFormat = 0,
+    Rgba8888 = 1,
+    Rgbx8888 = 2,
+    Rgb888 = 3,
+    Rgb565 = 4,
+    Bgra8888 = 5,
+    Rgba5551 = 6,
+    Rgba4444 = 7,
+};
+
+} // namespace android

src/core/hle/service/nvflinger/ui/graphic_buffer.h

@@ -44,7 +44,7 @@ public:
         return buffer_id;
     }
 
-    constexpr u32 ExternalFormat() const {
+    constexpr PixelFormat ExternalFormat() const {
         return external_format;
     }
 
@@ -89,7 +89,7 @@ private:
     INSERT_PADDING_WORDS(3);
     u32 buffer_id{};
     INSERT_PADDING_WORDS(6);
-    u32 external_format{};
+    PixelFormat external_format{};
     INSERT_PADDING_WORDS(10);
     u32 handle{};
     u32 offset{};