feat(gx): add uncompleted CGxDeviceGLSDL targeting Windows and Linux

src/gx/glsdl/GLSDLWindow.hpp

@@ -0,0 +1,44 @@
+#ifndef GX_GL_SDL_GL_SDL_WINDOW_HPP
+#define GX_GL_SDL_GL_SDL_WINDOW_HPP
+
+#include <cstdint>
+#include <SDL3/SDL.h>
+
+#include "gx/glsdl/GLTypes.hpp"
+
+class GLSDLWindowRect {
+    public:
+        struct Point {
+            int32_t x = 0;
+            int32_t y = 0;
+        };
+
+        struct Size {
+            int32_t width = 0;
+            int32_t height = 0;
+        };
+
+        Point origin;
+        Size  size;
+};
+
+class GLSDLWindow {
+    public:
+        SDL_Window*     m_sdlWindow    = nullptr;
+
+        // Create an SDL window with the requested OpenGL attributes
+        void Create(const char* title, const GLSDLWindowRect& rect, GLTextureFormat depthFormat, uint32_t sampleCount);
+        void Destroy();
+        void Swap();
+        void Resize(const GLSDLWindowRect& rect);
+
+        GLSDLWindowRect GetRect();
+        GLSDLWindowRect GetBackingRect();
+
+        int32_t GetWidth();
+        int32_t GetHeight();
+
+
+};
+
+#endif