show title splash while the game is loading

src/core/file_format/splash.cpp

@@ -0,0 +1,42 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <fstream>
+
+#include "common/assert.h"
+#include "common/io_file.h"
+#include "splash.h"
+
+#define STB_IMAGE_IMPLEMENTATION
+#define STBI_ONLY_PNG
+#define STBI_NO_STDIO
+#include "third-party/stb_image.h"
+
+bool Splash::Open(const std::string& filepath) {
+    ASSERT_MSG(filepath.ends_with(".png"), "Unexpected file format passed");
+
+    Common::FS::IOFile file(filepath, Common::FS::FileAccessMode::Read);
+    if (!file.IsOpen()) {
+        return false;
+    }
+
+    std::vector<u8> png_file{};
+    const auto png_size = file.GetSize();
+    png_file.resize(png_size);
+    file.Seek(0);
+    file.Read(png_file);
+
+    auto* img_mem = stbi_load_from_memory(png_file.data(), png_file.size(),
+                                          reinterpret_cast<int*>(&img_info.width),
+                                          reinterpret_cast<int*>(&img_info.height),
+                                          reinterpret_cast<int*>(&img_info.num_channels), 4);
+    if (!img_mem) {
+        return false;
+    }
+
+    const auto img_size = img_info.GetSizeBytes();
+    img_data.resize(img_size);
+    std::memcpy(img_data.data(), img_mem, img_size);
+    stbi_image_free(img_mem);
+    return true;
+}

src/core/file_format/splash.h

@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <string>
+#include <vector>
+#include "common/types.h"
+
+class Splash {
+public:
+    struct ImageInfo {
+        u32 width;
+        u32 height;
+        u32 num_channels;
+
+        u32 GetSizeBytes() const {
+            return width * height * 4; // we always forcing rgba8 for simplicity
+        }
+    };
+
+    Splash() = default;
+    ~Splash() = default;
+
+    bool Open(const std::string& filepath);
+    [[nodiscard]] bool IsLoaded() const {
+        return img_data.size();
+    }
+
+    const auto& GetImageData() const {
+        return img_data;
+    }
+
+    ImageInfo GetImageInfo() const {
+        return img_info;
+    }
+
+private:
+    ImageInfo img_info{};
+    std::vector<u8> img_data{};
+};