Textures loading screen (#6478)

* Add a loading screen for the preloading textures

*The PreloadTextures() function is called from the EmuThread to prevent citra to freezing

*Add a the preloading textures loadingscreen in loading_screen.cpp

*Add custom_tex_manager.reset() in core.cpp to release ram memory after exiting a game

* Add custom textures loading in EmuThread

* Remove useless variable

* Revert "Add custom textures loading in EmuThread"

This reverts commit 45ed46fa09159f782c5d20a4330b4eb7cfcdc253.

* Moved include from bootmanager.h to bootmanager.cpp

src/video_core/custom_textures/custom_tex_manager.cpp

@@ -190,8 +190,10 @@ void CustomTexManager::WriteConfig() {
     file.WriteString(output);
 }
 
-void CustomTexManager::PreloadTextures() {
+void CustomTexManager::PreloadTextures(const std::atomic_bool& stop_run,
+                                       const VideoCore::DiskResourceLoadCallback& callback) {
     u64 size_sum = 0;
+    size_t preloaded = 0;
     const u64 sys_mem = Common::GetMemInfo().total_physical_memory;
     const u64 recommended_min_mem = 2 * size_t(1024 * 1024 * 1024);
 
@@ -206,8 +208,15 @@ void CustomTexManager::PreloadTextures() {
                 LOG_WARNING(Render, "Aborting texture preload due to insufficient memory");
                 return;
             }
+            if (stop_run) {
+                return;
+            }
             material->LoadFromDisk(flip_png_files);
             size_sum += material->size;
+            if (callback) {
+                callback(VideoCore::LoadCallbackStage::Preload, preloaded, custom_textures.size());
+            }
+            preloaded++;
         }
     });
     workers->WaitForRequests();

src/video_core/custom_textures/custom_tex_manager.h

@@ -10,6 +10,7 @@
 #include <unordered_set>
 #include "common/thread_worker.h"
 #include "video_core/custom_textures/material.h"
+#include "video_core/rasterizer_interface.h"
 
 namespace Core {
 class System;
@@ -43,7 +44,8 @@ public:
     void WriteConfig();
 
     /// Preloads all registered custom textures
-    void PreloadTextures();
+    void PreloadTextures(const std::atomic_bool& stop_run,
+                         const VideoCore::DiskResourceLoadCallback& callback);
 
     /// Saves the provided pixel data described by params to disk as png
     void DumpTexture(const SurfaceParams& params, u32 level, std::span<u8> data, u64 data_hash);

src/video_core/rasterizer_interface.h

@@ -21,6 +21,7 @@ namespace VideoCore {
 
 enum class LoadCallbackStage {
     Prepare,
+    Preload,
     Decompile,
     Build,
     Complete,