VideoCommon: refactor the custom pipeline logic in the graphics mod action into a separate class, so it is reusable

Source/Core/VideoCommon/GraphicsModSystem/Runtime/CustomPipeline.h

@@ -0,0 +1,48 @@
+// Copyright 2024 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <memory>
+#include <optional>
+#include <span>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include "VideoCommon/AbstractTexture.h"
+#include "VideoCommon/Assets/CustomAssetLibrary.h"
+#include "VideoCommon/Assets/MaterialAsset.h"
+#include "VideoCommon/Assets/ShaderAsset.h"
+#include "VideoCommon/Assets/TextureAsset.h"
+#include "VideoCommon/ShaderGenCommon.h"
+
+namespace VideoCommon
+{
+class CustomAssetLoader;
+}
+
+struct CustomPipeline
+{
+  void UpdatePixelData(VideoCommon::CustomAssetLoader& loader,
+                       std::shared_ptr<VideoCommon::CustomAssetLibrary> library,
+                       std::span<const u32> texture_units,
+                       const VideoCommon::CustomAssetLibrary::AssetID& material_to_load);
+
+  VideoCommon::CachedAsset<VideoCommon::MaterialAsset> m_pixel_material;
+  VideoCommon::CachedAsset<VideoCommon::PixelShaderAsset> m_pixel_shader;
+
+  struct CachedTextureAsset
+  {
+    VideoCommon::CachedAsset<VideoCommon::GameTextureAsset> m_cached_asset;
+    std::unique_ptr<AbstractTexture> m_texture;
+    std::string m_sampler_code;
+    std::string m_define_code;
+  };
+  std::vector<std::optional<CachedTextureAsset>> m_game_textures;
+
+  ShaderCode m_last_generated_shader_code;
+  ShaderCode m_last_generated_material_code;
+
+  std::vector<u8> m_material_data;
+};