Hyprland/src/protocols/Screencopy.hpp

#pragma once

#include "../defines.hpp"
#include "wlr-screencopy-unstable-v1-protocol.h"

#include <list>
#include <vector>
#include "../managers/HookSystemManager.hpp"
#include "../helpers/Timer.hpp"

class CMonitor;

enum eClientOwners
{
    CLIENT_SCREENCOPY = 0,
    CLIENT_TOPLEVEL_EXPORT
};

class CScreencopyClient {
  public:
    CScreencopyClient();
    ~CScreencopyClient();

    int               ref      = 0;
    wl_resource*      resource = nullptr;

    eClientOwners     clientOwner = CLIENT_SCREENCOPY;

    int               frameCounter           = 0;
    int               framesInLastHalfSecond = 0;
    CTimer            lastMeasure;
    CTimer            lastFrame;
    bool              sentScreencast = false;

    void              onTick();
    HOOK_CALLBACK_FN* tickCallback = nullptr;

    bool              operator==(const CScreencopyClient& other) const {
        return resource == other.resource;
    }
};

struct SScreencopyFrame {
    wl_resource*       resource = nullptr;
    CScreencopyClient* client   = nullptr;

    uint32_t           shmFormat    = 0;
    uint32_t           dmabufFormat = 0;
    CBox               box          = {};
    int                shmStride    = 0;

    bool               overlayCursor = false;
    bool               withDamage    = false;

    wlr_buffer_cap     bufferCap = WLR_BUFFER_CAP_SHM;

    wlr_buffer*        buffer = nullptr;

    CMonitor*          pMonitor = nullptr;
    CWindow*           pWindow  = 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(CScreencopyClient* 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, CBox box = {0, 0, 0, 0});

    void copyFrame(wl_client* client, wl_resource* resource, wl_resource* buffer);

    void onOutputCommit(CMonitor* pMonitor, wlr_output_event_commit* e);

  private:
    wl_global*                     m_pGlobal = nullptr;
    std::list<SScreencopyFrame>    m_lFrames;
    std::list<CScreencopyClient>   m_lClients;

    wl_listener                    m_liDisplayDestroy;

    std::vector<SScreencopyFrame*> m_vFramesAwaitingWrite;

    wlr_buffer*                    m_pLastMonitorBackBuffer = nullptr;

    void                           shareAllFrames(CMonitor* pMonitor);
    void                           shareFrame(SScreencopyFrame* frame);
    void                           sendFrameDamage(SScreencopyFrame* frame);
    bool                           copyFrameDmabuf(SScreencopyFrame* frame);
    bool                           copyFrameShm(SScreencopyFrame* frame, timespec* now);

    friend class CScreencopyClient;
};