From 90398614bcc9e1c1bde7a0f65a0db66173a1d8b4 Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Thu, 27 Aug 2026 10:50:02 +0200
Subject: add: window manager and opengl context

---
 src/core/window_manager.cpp | 77 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 src/core/window_manager.cpp

(limited to 'src/core/window_manager.cpp')

diff --git a/src/core/window_manager.cpp b/src/core/window_manager.cpp
new file mode 100644
index 0000000..f2e4af3
--- /dev/null
+++ b/src/core/window_manager.cpp
@@ -0,0 +1,77 @@
+#include "core/window_manager.h"
+
+#include "core/assert.h"
+#include "core/log.h"
+
+#include <GLFW/glfw3.h>
+
+#include <algorithm>
+
+namespace Hsdbg
+{
+    WindowManager* WindowManager::s_instance = nullptr;
+
+    WindowManager::WindowManager()
+    {
+        HSDBG_ASSERT(s_instance == nullptr, "a WindowManager instance already exists");
+        s_instance = this;
+
+        glfwSetErrorCallback(on_error);
+
+        const bool initialized = glfwInit() == GLFW_TRUE;
+        HSDBG_ASSERT(initialized, "failed to initialize glfw");
+
+        Log::info("glfw {}", glfwGetVersionString());
+    }
+
+    WindowManager::~WindowManager()
+    {
+        m_windows.clear();
+
+        glfwTerminate();
+
+        s_instance = nullptr;
+    }
+
+    auto WindowManager::get() -> WindowManager&
+    {
+        HSDBG_ASSERT(s_instance != nullptr, "no WindowManager instance has been created");
+        return *s_instance;
+    }
+
+    auto WindowManager::create_window(const WindowSpec& spec) -> Window&
+    {
+        return *m_windows.emplace_back(std::make_unique<Window>(spec));
+    }
+
+    auto WindowManager::destroy_window(const Window& window) -> void
+    {
+        const auto entry = std::ranges::find_if(m_windows, [&window](const auto& candidate)
+        {
+            return candidate.get() == &window;
+        });
+
+        if (entry == m_windows.end())
+        {
+            Log::warn("tried to destroy a window that this manager does not own");
+            return;
+        }
+
+        m_windows.erase(entry);
+    }
+
+    auto WindowManager::poll_events() -> void
+    {
+        glfwPollEvents();
+    }
+
+    auto WindowManager::wait_events(double timeout_seconds) -> void
+    {
+        glfwWaitEventsTimeout(timeout_seconds);
+    }
+
+    auto WindowManager::on_error(int code, const char* description) -> void
+    {
+        Log::error("glfw error {}: {}", code, description);
+    }
+}
-- 
cgit v1.3