added discord game sdk

src/discord-game-sdk-cpp/image_manager.cpp

@@ -0,0 +1,57 @@
+#if !defined(_CRT_SECURE_NO_WARNINGS)
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "image_manager.h"
+
+#include "core.h"
+
+#include <cstring>
+#include <memory>
+
+namespace discord {
+
+void ImageManager::Fetch(ImageHandle handle,
+                         bool refresh,
+                         std::function<void(Result, ImageHandle)> callback)
+{
+    static auto wrapper =
+      [](void* callbackData, EDiscordResult result, DiscordImageHandle handleResult) -> void {
+        std::unique_ptr<std::function<void(Result, ImageHandle)>> cb(
+          reinterpret_cast<std::function<void(Result, ImageHandle)>*>(callbackData));
+        if (!cb || !(*cb)) {
+            return;
+        }
+        (*cb)(static_cast<Result>(result), *reinterpret_cast<ImageHandle const*>(&handleResult));
+    };
+    std::unique_ptr<std::function<void(Result, ImageHandle)>> cb{};
+    cb.reset(new std::function<void(Result, ImageHandle)>(std::move(callback)));
+    internal_->fetch(internal_,
+                     *reinterpret_cast<DiscordImageHandle const*>(&handle),
+                     (refresh ? 1 : 0),
+                     cb.release(),
+                     wrapper);
+}
+
+Result ImageManager::GetDimensions(ImageHandle handle, ImageDimensions* dimensions)
+{
+    if (!dimensions) {
+        return Result::InternalError;
+    }
+
+    auto result = internal_->get_dimensions(internal_,
+                                            *reinterpret_cast<DiscordImageHandle const*>(&handle),
+                                            reinterpret_cast<DiscordImageDimensions*>(dimensions));
+    return static_cast<Result>(result);
+}
+
+Result ImageManager::GetData(ImageHandle handle, std::uint8_t* data, std::uint32_t dataLength)
+{
+    auto result = internal_->get_data(internal_,
+                                      *reinterpret_cast<DiscordImageHandle const*>(&handle),
+                                      reinterpret_cast<uint8_t*>(data),
+                                      dataLength);
+    return static_cast<Result>(result);
+}
+
+} // namespace discord