Hyprland Screencopy impl (#1800)

---------

Co-authored-by: Mihai Fufezan <fufexan@protonmail.com>

src/protocols/Screencopy.hpp

@@ -0,0 +1,71 @@
+#pragma once
+
+#include "../defines.hpp"
+#include "wlr-screencopy-unstable-v1-protocol.h"
+
+#include <list>
+#include <vector>
+
+class CMonitor;
+
+struct SScreencopyClient {
+    int          ref      = 0;
+    wl_resource* resource = nullptr;
+
+    bool         operator==(const SScreencopyClient& other) const {
+        return resource == other.resource;
+    }
+};
+
+struct SScreencopyFrame {
+    wl_resource*       resource = nullptr;
+    SScreencopyClient* client   = nullptr;
+
+    uint32_t           shmFormat    = 0;
+    uint32_t           dmabufFormat = 0;
+    wlr_box            box          = {0};
+    int                shmStride    = 0;
+
+    bool               overlayCursor = false;
+    bool               withDamage    = false;
+
+    wlr_buffer_cap     bufferCap = WLR_BUFFER_CAP_SHM;
+
+    wlr_buffer*        buffer = nullptr;
+
+    CMonitor*          pMonitor = nullptr;
+
+    bool               operator==(const SScreencopyFrame& other) const {
+        return resource == other.resource && client == other.client;
+    }
+};
+
+class CScreencopyProtocolManager {
+  public:
+    CScreencopyProtocolManager();
+
+    void bindManager(wl_client* client, void* data, uint32_t version, uint32_t id);
+    void removeClient(SScreencopyClient* client, bool force = false);
+    void removeFrame(SScreencopyFrame* frame, bool force = false);
+    void displayDestroy();
+
+    void captureOutput(wl_client* client, wl_resource* resource, uint32_t frame, int32_t overlay_cursor, wl_resource* output, wlr_box box = {0, 0, 0, 0});
+
+    void copyFrame(wl_client* client, wl_resource* resource, wl_resource* buffer);
+
+    void onRenderEnd(CMonitor* pMonitor);
+
+  private:
+    wl_global*                     m_pGlobal = nullptr;
+    std::list<SScreencopyFrame>    m_lFrames;
+    std::list<SScreencopyClient>   m_lClients;
+
+    wl_listener                    m_liDisplayDestroy;
+
+    std::vector<SScreencopyFrame*> m_vFramesAwaitingWrite;
+
+    void                           shareFrame(SScreencopyFrame* frame);
+    void                           sendFrameDamage(SScreencopyFrame* frame);
+    bool                           copyFrameDmabuf(SScreencopyFrame* frame);
+    bool                           copyFrameShm(SScreencopyFrame* frame, timespec* now);
+};