Attempt to render cursor when X11 is available

sunshine/platform/linux/x11grab.h

@@ -0,0 +1,48 @@
+#ifndef SUNSHINE_X11_GRAB
+#define SUNSHINE_X11_GRAB
+
+#include <optional>
+
+#include "sunshine/platform/common.h"
+#include "sunshine/utility.h"
+
+namespace egl {
+class cursor_t;
+}
+
+namespace platf::x11 {
+
+#ifdef SUNSHINE_BUILD_X11
+struct cursor_ctx_raw_t;
+void freeCursorCtx(cursor_ctx_raw_t *ctx);
+
+using cursor_ctx_t = util::safe_ptr<cursor_ctx_raw_t, freeCursorCtx>;
+
+class cursor_t {
+public:
+  static std::optional<cursor_t> make();
+
+  void capture(egl::cursor_t &img);
+
+  /**
+   * Capture and blend the cursor into the image
+   * 
+   * img <-- destination image
+   * offsetX, offsetY <--- Top left corner of the virtual screen
+   */
+  void blend(img_t &img, int offsetX, int offsetY);
+
+  cursor_ctx_t ctx;
+};
+#else
+class cursor_t {
+public:
+  static std::optional<cursor_t> make() { return std::nullopt; }
+
+  void capture(egl::cursor_t &) {}
+  void blend(img_t &, int, int) {}
+};
+#endif
+} // namespace platf::x11
+
+#endif