Wayland: Initial progress

.gitignore

@@ -34,3 +34,6 @@
 build/
 .vscode/
 .cache/
+
+protocols/*.cpp
+protocols/*.hpp

CMakeLists.txt

@@ -16,7 +16,7 @@ set(INCLUDE ${CMAKE_INSTALL_FULL_INCLUDEDIR})
 set(LIBDIR ${CMAKE_INSTALL_FULL_LIBDIR})
 
 find_package(PkgConfig REQUIRED)
-pkg_check_modules(deps REQUIRED IMPORTED_TARGET wayland-client wayland-protocols hyprutils>=0.1.2)
+pkg_check_modules(deps REQUIRED IMPORTED_TARGET wayland-client wayland-protocols hyprutils>=0.1.2 pixman-1 wayland-client)
 
 configure_file(aquamarine.pc.in aquamarine.pc @ONLY)
 
@@ -36,7 +36,7 @@ file(GLOB_RECURSE PUBLIC_HEADERS CONFIGURE_DEPENDS "include/*.hpp")
 add_library(aquamarine SHARED ${SRCFILES})
 target_include_directories( aquamarine
     PUBLIC "./include"
-    PRIVATE "./src"
+    PRIVATE "./src" "./src/include" "./protocols"
 )
 set_target_properties(aquamarine PROPERTIES
     VERSION ${AQUAMARINE_VERSION}
@@ -44,6 +44,48 @@ set_target_properties(aquamarine PROPERTIES
 )
 target_link_libraries(aquamarine PkgConfig::deps)
 
+# Protocols
+pkg_get_variable(WAYLAND_PROTOCOLS_DIR wayland-protocols pkgdatadir)
+message(STATUS "Found wayland-protocols at ${WAYLAND_PROTOCOLS_DIR}")
+pkg_get_variable(WAYLAND_CLIENT_DIR wayland-client pkgdatadir)
+message(STATUS "Found wayland-client at ${WAYLAND_CLIENT_DIR}")
+
+function(protocolNew protoPath protoName external)
+    if (external)
+        set(path ${CMAKE_SOURCE_DIR}/${protoPath})
+    else()
+        set(path ${WAYLAND_PROTOCOLS_DIR}/${protoPath})
+    endif()
+    add_custom_command(
+        OUTPUT ${CMAKE_SOURCE_DIR}/protocols/${protoName}.cpp
+               ${CMAKE_SOURCE_DIR}/protocols/${protoName}.hpp
+        COMMAND hyprwayland-scanner --client ${path}/${protoName}.xml ${CMAKE_SOURCE_DIR}/protocols/
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    )
+    target_sources(aquamarine PRIVATE protocols/${protoName}.cpp protocols/${protoName}.hpp)
+endfunction()
+function(protocolWayland)
+    add_custom_command(
+        OUTPUT ${CMAKE_SOURCE_DIR}/protocols/wayland.cpp
+               ${CMAKE_SOURCE_DIR}/protocols/wayland.hpp
+        COMMAND hyprwayland-scanner --wayland-enums --client ${WAYLAND_CLIENT_DIR}/wayland.xml ${CMAKE_SOURCE_DIR}/protocols/
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    )
+    target_sources(aquamarine PRIVATE protocols/wayland.cpp protocols/wayland.hpp)
+endfunction()
+
+protocolWayland()
+
+protocolNew("stable/xdg-shell" "xdg-shell" false)
+
+# tests
+add_custom_target(tests)
+
+add_executable(simpleWindow "tests/SimpleWindow.cpp")
+target_link_libraries(simpleWindow PRIVATE aquamarine PkgConfig::deps)
+add_test(NAME "simpleWindow" WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/tests COMMAND simpleWindow "simpleWindow")
+add_dependencies(tests simpleWindow)
+
 # Installation
 install(TARGETS aquamarine)
 install(DIRECTORY "include/aquamarine" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

include/aquamarine/backend/Backend.hpp

@@ -1,8 +1,11 @@
 #pragma once
 
 #include <hyprutils/memory/SharedPtr.hpp>
+#include <hyprutils/signal/Signal.hpp>
 #include <vector>
 #include <functional>
+#include <mutex>
+#include <condition_variable>
 
 namespace Aquamarine {
     enum eBackendType {
@@ -47,8 +50,13 @@ namespace Aquamarine {
 
     class IBackendImplementation {
       public:
-        virtual ~IBackendImplementation();
+        virtual ~IBackendImplementation() {
+            ;
+        }
         virtual eBackendType type()           = 0;
+        virtual bool         start()          = 0;
+        virtual int          pollFD()         = 0;
+        virtual bool         dispatchEvents() = 0;
     };
 
     class CBackend {
@@ -63,10 +71,33 @@ namespace Aquamarine {
 
         void log(eBackendLogLevel level, const std::string& msg);
 
+        /* Enters the event loop synchronously. For simple clients, this is probably what you want. For more complex ones,
+           see async methods further below */
+        void enterLoop();
+
+        struct {
+            Hyprutils::Signal::CSignal newOutput;
+            Hyprutils::Signal::CSignal newPointer;
+            Hyprutils::Signal::CSignal newKeyboard;
+            Hyprutils::Signal::CSignal newTouch;
+        } events;
+
       private:
         CBackend();
 
-        std::vector<IBackendImplementation> implementations;
+        bool                                                                   terminate = false;
+
+        std::vector<SBackendImplementationOptions>                             implementationOptions;
+        std::vector<Hyprutils::Memory::CSharedPointer<IBackendImplementation>> implementations;
         SBackendOptions                                                        options;
+
+        //
+        struct {
+            std::condition_variable loopSignal;
+            std::mutex              loopMutex;
+            std::atomic<bool>       shouldProcess = false;
+            std::mutex              loopRequestMutex;
+            std::mutex              eventLock;
+        } m_sEventLoopInternals;
     };
 };

include/aquamarine/backend/Wayland.hpp

@@ -0,0 +1,106 @@
+#pragma once
+
+#include "./Backend.hpp"
+#include "../output/Output.hpp"
+#include "../input/Input.hpp"
+#include <hyprutils/memory/WeakPtr.hpp>
+#include <wayland-client.h>
+#include <wayland.hpp>
+#include <xdg-shell.hpp>
+
+namespace Aquamarine {
+    class CBackend;
+    class CWaylandBackend;
+
+    class CWaylandOutput : public IOutput {
+      public:
+        virtual ~CWaylandOutput();
+        virtual void commit();
+
+      private:
+        CWaylandOutput(const std::string& name_, Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend_);
+
+        std::string                                      name;
+        Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend;
+
+        struct {
+            Hyprutils::Memory::CSharedPointer<CWlSurface>   surface;
+            Hyprutils::Memory::CSharedPointer<CXdgSurface>  xdgSurface;
+            Hyprutils::Memory::CSharedPointer<CXdgToplevel> xdgToplevel;
+        } waylandState;
+
+        friend class CWaylandBackend;
+        friend class CWaylandPointer;
+    };
+
+    class CWaylandKeyboard : public IKeyboard {
+      public:
+        CWaylandKeyboard(Hyprutils::Memory::CSharedPointer<CWlKeyboard> keyboard_, Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend_);
+        virtual ~CWaylandKeyboard();
+
+        virtual const std::string&                       getName();
+
+        Hyprutils::Memory::CSharedPointer<CWlKeyboard>   keyboard;
+        Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend;
+
+      private:
+        const std::string name = "wl_keyboard";
+    };
+
+    class CWaylandPointer : public IPointer {
+      public:
+        CWaylandPointer(Hyprutils::Memory::CSharedPointer<CWlPointer> pointer_, Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend_);
+        virtual ~CWaylandPointer();
+
+        virtual const std::string&                       getName();
+
+        Hyprutils::Memory::CSharedPointer<CWlPointer>    pointer;
+        Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend;
+
+      private:
+        const std::string name = "wl_pointer";
+    };
+
+    class CWaylandBackend : public IBackendImplementation {
+      public:
+        virtual ~CWaylandBackend();
+        virtual eBackendType                             type();
+        virtual bool                                     start();
+        virtual int                                      pollFD();
+        virtual bool                                     dispatchEvents();
+
+        Hyprutils::Memory::CWeakPointer<CWaylandBackend> self;
+
+      private:
+        CWaylandBackend(Hyprutils::Memory::CSharedPointer<CBackend> backend);
+
+        void initSeat();
+        void initShell();
+        void createOutput(const std::string& szName);
+
+        //
+        Hyprutils::Memory::CWeakPointer<CBackend>                        backend;
+        std::vector<Hyprutils::Memory::CSharedPointer<CWaylandOutput>>   outputs;
+        std::vector<Hyprutils::Memory::CSharedPointer<CWaylandKeyboard>> keyboards;
+        std::vector<Hyprutils::Memory::CSharedPointer<CWaylandPointer>>  pointers;
+
+        // pointer focus
+        Hyprutils::Memory::CWeakPointer<CWaylandOutput> focusedOutput;
+        uint32_t                                        lastEnterSerial = 0;
+
+        struct {
+            wl_display* display = nullptr;
+
+            // hw-s types
+            Hyprutils::Memory::CSharedPointer<CWlRegistry>   registry;
+            Hyprutils::Memory::CSharedPointer<CWlSeat>       seat;
+            Hyprutils::Memory::CSharedPointer<CXdgWmBase>    xdg;
+            Hyprutils::Memory::CSharedPointer<CWlCompositor> compositor;
+        } waylandState;
+
+        friend class CBackend;
+        friend class CWaylandKeyboard;
+        friend class CWaylandPointer;
+        friend class CWaylandOutput;
+    };
+};

include/aquamarine/buffer/Buffer.hpp

@@ -0,0 +1,72 @@
+#pragma once
+
+#include <array>
+#include <tuple>
+#include <hyprutils/signal/Signal.hpp>
+#include <hyprutils/math/Region.hpp>
+
+namespace Aquamarine {
+    enum eBufferCapability {
+        BUFFER_CAPABILITY_DATAPTR = (1 << 0),
+    };
+
+    enum eBufferType {
+        BUFFER_TYPE_DMABUF = 0,
+        BUFFER_TYPE_SHM,
+        BUFFER_TYPE_MISC,
+    };
+
+    class CWLBufferResource;
+
+    struct SDMABUFAttrs {
+        bool                      success = false;
+        Hyprutils::Math::Vector2D size;
+        uint32_t                  format   = 0; // fourcc
+        uint64_t                  modifier = 0;
+
+        int                       planes  = 1;
+        std::array<uint32_t, 4>   offsets = {0};
+        std::array<uint32_t, 4>   strides = {0};
+        std::array<int, 4>        fds     = {-1, -1, -1, -1};
+    };
+
+    struct SSHMAttrs {
+        bool                      success = false;
+        int                       fd      = 0;
+        uint32_t                  format  = 0;
+        Hyprutils::Math::Vector2D size;
+        int                       stride = 0;
+        int64_t                   offset = 0;
+    };
+
+    class IBuffer {
+      public:
+        virtual ~IBuffer() {
+            ;
+        };
+
+        virtual eBufferCapability                      caps()                                         = 0;
+        virtual eBufferType                            type()                                         = 0;
+        virtual void                                   update(const Hyprutils::Math::CRegion& damage) = 0;
+        virtual bool                                   isSynchronous() = 0; // whether the updates to this buffer are synchronous, aka happen over cpu
+        virtual SDMABUFAttrs                           dmabuf();
+        virtual SSHMAttrs                              shm();
+        virtual std::tuple<uint8_t*, uint32_t, size_t> beginDataPtr(uint32_t flags);
+        virtual void                                   endDataPtr();
+        virtual void                                   sendRelease();
+        virtual void                                   lock();
+        virtual void                                   unlock();
+        virtual bool                                   locked();
+
+        Hyprutils::Math::Vector2D                      size;
+        bool                                           opaque = false;
+
+        struct {
+            Hyprutils::Signal::CSignal destroy;
+        } events;
+
+      private:
+        int locks = 0;
+    };
+
+};

include/aquamarine/input/Input.hpp

@@ -1,13 +1,28 @@
 #pragma once
 
 #include <hyprutils/signal/Signal.hpp>
+#include <hyprutils/math/Vector2D.hpp>
 
 struct libinput_device;
 
 namespace Aquamarine {
     class IKeyboard {
       public:
+        virtual ~IKeyboard() {
+            events.destroy.emit();
+        }
         virtual libinput_device*   getLibinputHandle();
+        virtual const std::string& getName() = 0;
+
+        struct SKeyEvent {
+            uint32_t timeMs  = 0;
+            uint32_t key     = 0;
+            bool     pressed = false;
+        };
+
+        struct SModifiersEvent {
+            uint32_t depressed = 0, latched = 0, locked = 0, group = 0;
+        };
 
         struct {
             Hyprutils::Signal::CSignal destroy;
@@ -18,7 +33,37 @@ namespace Aquamarine {
 
     class IPointer {
       public:
+        virtual ~IPointer() {
+            events.destroy.emit();
+        }
+
         virtual libinput_device*   getLibinputHandle();
+        virtual const std::string& getName() = 0;
+
+        enum ePointerAxis {
+            AQ_POINTER_AXIS_VERTICAL = 0,
+            AQ_POINTER_AXIS_HORIZONTAL,
+        };
+
+        struct SMoveEvent {
+            Hyprutils::Math::Vector2D delta;
+        };
+
+        struct SWarpEvent {
+            Hyprutils::Math::Vector2D absolute;
+        };
+
+        struct SButtonEvent {
+            uint32_t timeMs  = 0;
+            uint32_t button  = 0;
+            bool     pressed = false;
+        };
+
+        struct SAxisEvent {
+            uint32_t     timeMs = 0;
+            ePointerAxis axis   = AQ_POINTER_AXIS_VERTICAL;
+            double       value  = 0.0;
+        };
 
         struct {
             Hyprutils::Signal::CSignal destroy;
@@ -26,6 +71,7 @@ namespace Aquamarine {
             Hyprutils::Signal::CSignal warp;
             Hyprutils::Signal::CSignal button;
             Hyprutils::Signal::CSignal axis;
+            Hyprutils::Signal::CSignal frame;
         } events;
     };
 }

include/aquamarine/output/Output.hpp

@@ -0,0 +1,66 @@
+#pragma once
+
+#include <vector>
+#include <hyprutils/signal/Signal.hpp>
+#include <hyprutils/memory/SharedPtr.hpp>
+#include <hyprutils/math/Region.hpp>
+
+namespace Aquamarine {
+    struct SOutputMode {
+        Hyprutils::Math::Vector2D pixelSize;
+        unsigned int              refreshRate = 0 /* in mHz */;
+        bool                      preferred   = false;
+    };
+
+    enum eOutputPresentationMode {
+        AQ_OUTPUT_PRESENTATION_VSYNC = 0,
+        AQ_OUTPUT_PRESENTATION_IMMEDIATE, // likely tearing
+    };
+
+    class IOutput;
+
+    class COutputState {
+      public:
+        COutputState(Hyprutils::Memory::CSharedPointer<IOutput> parent);
+
+        Hyprutils::Math::CRegion                     damage;
+        bool                                         enabled          = false;
+        bool                                         adaptiveSync     = false;
+        eOutputPresentationMode                      presentationMode = AQ_OUTPUT_PRESENTATION_VSYNC;
+        std::vector<uint16_t>                        gammaLut;
+        Hyprutils::Math::Vector2D                    lastModeSize;
+        Hyprutils::Memory::CWeakPointer<SOutputMode> mode;
+    };
+
+    class IOutput {
+      public:
+        virtual ~IOutput() {
+            ;
+        }
+
+        virtual void              commit() = 0;
+
+        std::string               name, description, make, model, serial;
+        Hyprutils::Math::Vector2D physicalSize;
+        bool                      enabled      = false;
+        bool                      adaptiveSync = false;
+        bool                      nonDesktop   = false;
+
+        //
+        std::vector<Hyprutils::Memory::CSharedPointer<SOutputMode>> modes;
+        Hyprutils::Memory::CSharedPointer<COutputState>             state;
+
+        //
+        struct SStateEvent {
+            Hyprutils::Math::Vector2D size;
+        };
+
+        struct {
+            Hyprutils::Signal::CSignal destroy;
+            Hyprutils::Signal::CSignal frame;
+            Hyprutils::Signal::CSignal needsFrame;
+            Hyprutils::Signal::CSignal present;
+            Hyprutils::Signal::CSignal state;
+        } events;
+    };
+}

src/backend/Backend.cpp

@@ -1,29 +1,92 @@
 #include <aquamarine/backend/Backend.hpp>
+#include <aquamarine/backend/Wayland.hpp>
+#include <sys/poll.h>
+#include <thread>
+#include <chrono>
 
 using namespace Hyprutils::Memory;
 using namespace Aquamarine;
 #define SP CSharedPointer
 
+static const char* backendTypeToName(eBackendType type) {
+    switch (type) {
+        case AQ_BACKEND_DRM: return "drm";
+        case AQ_BACKEND_HEADLESS: return "headless";
+        case AQ_BACKEND_WAYLAND: return "wayland";
+        default: break;
+    }
+    return "invalid";
+}
+
 Aquamarine::CBackend::CBackend() {
     ;
 }
 
+Aquamarine::SBackendImplementationOptions::SBackendImplementationOptions() {
+    backendType        = AQ_BACKEND_WAYLAND;
+    backendRequestMode = AQ_BACKEND_REQUEST_IF_AVAILABLE;
+}
+
+Aquamarine::SBackendOptions::SBackendOptions() {
+    logFunction = nullptr;
+}
+
 Hyprutils::Memory::CSharedPointer<CBackend> Aquamarine::CBackend::create(const std::vector<SBackendImplementationOptions>& backends, const SBackendOptions& options) {
     auto backend = SP<CBackend>(new CBackend());
 
     backend->options               = options;
+    backend->implementationOptions = backends;
 
-    backend->log(AQ_LOG_DEBUG, "Hello world!\n");
+    backend->log(AQ_LOG_DEBUG, "Creating an Aquamarine backend!");
+
+    for (auto& b : backends) {
+        if (b.backendType == AQ_BACKEND_WAYLAND) {
+            auto ref = SP<CWaylandBackend>(new CWaylandBackend(backend));
+            backend->implementations.emplace_back(ref);
+            ref->self = ref;
+        } else {
+            backend->log(AQ_LOG_ERROR, std::format("Unknown backend id: {}", (int)b.backendType));
+            continue;
+        }
+    }
 
     return backend;
 }
 
 Aquamarine::CBackend::~CBackend() {
-    log(AQ_LOG_DEBUG, "Bye world!\n");
+    ;
 }
 
 bool Aquamarine::CBackend::start() {
-    log(AQ_LOG_DEBUG, "Starting world!\n");
+    log(AQ_LOG_DEBUG, "Starting the Aquamarine backend!");
+
+    bool fallback = false;
+    int  started  = 0;
+
+    for (size_t i = 0; i < implementations.size(); ++i) {
+        const bool ok = implementations.at(i)->start();
+
+        if (!ok) {
+            log(AQ_LOG_ERROR, std::format("Requested backend ({}) could not start, enabling fallbacks", backendTypeToName(implementationOptions.at(i).backendType)));
+            fallback = true;
+            if (implementationOptions.at(i).backendRequestMode == AQ_BACKEND_REQUEST_MANDATORY) {
+                log(AQ_LOG_CRITICAL,
+                    std::format("Requested backend ({}) could not start and it's mandatory, cannot continue!", backendTypeToName(implementationOptions.at(i).backendType)));
+                implementations.clear();
+                return false;
+            }
+        } else
+            started++;
+    }
+
+    if (implementations.empty() || started <= 0) {
+        log(AQ_LOG_CRITICAL, "No backend could be opened. Make sure there was a correct backend passed to CBackend, and that your environment supports at least one of them.");
+        return false;
+    }
+
+    // erase failed impls
+    std::erase_if(implementations, [](const auto& i) { return i->pollFD() < 0; });
+
     return true;
 }
 
@@ -33,3 +96,63 @@ void Aquamarine::CBackend::log(eBackendLogLevel level, const std::string& msg) {
 
     options.logFunction(level, msg);
 }
+
+void Aquamarine::CBackend::enterLoop() {
+    std::vector<pollfd> pollFDs;
+
+    for (auto& i : implementations) {
+        auto fd = i->pollFD();
+
+        pollFDs.emplace_back(pollfd{.fd = fd, .events = POLLIN, .revents = 0});
+    }
+
+    std::thread pollThr([this, &pollFDs]() {
+        int ret = 0;
+        while (1) {
+            ret = poll(pollFDs.data(), pollFDs.size(), 5000 /* 5 seconds, reasonable. It's because we might need to terminate */);
+            if (ret < 0) {
+                log(AQ_LOG_CRITICAL, std::format("Polling fds failed with {}", errno));
+                terminate = true;
+                exit(1);
+            }
+
+            for (size_t i = 0; i < pollFDs.size(); ++i) {
+                if (pollFDs[i].revents & POLLHUP) {
+                    log(AQ_LOG_CRITICAL, std::format("disconnected from pollfd {}", i));
+                    terminate = true;
+                    exit(1);
+                }
+            }
+
+            if (terminate)
+                break;
+
+            if (ret != 0) {
+                std::lock_guard<std::mutex> lg(m_sEventLoopInternals.loopRequestMutex);
+                m_sEventLoopInternals.shouldProcess = true;
+                m_sEventLoopInternals.loopSignal.notify_all();
+            }
+        }
+    });
+
+    while (1) {
+        m_sEventLoopInternals.loopRequestMutex.unlock(); // unlock, we are ready to take events
+
+        std::unique_lock lk(m_sEventLoopInternals.loopMutex);
+        if (m_sEventLoopInternals.shouldProcess == false) // avoid a lock if a thread managed to request something already since we .unlock()ed
+            m_sEventLoopInternals.loopSignal.wait_for(lk, std::chrono::seconds(5), [this] { return m_sEventLoopInternals.shouldProcess == true; }); // wait for events
+
+        m_sEventLoopInternals.loopRequestMutex.lock(); // lock incoming events
+
+        if (terminate)
+            break;
+
+        m_sEventLoopInternals.shouldProcess = false;
+
+        std::lock_guard<std::mutex> lg(m_sEventLoopInternals.eventLock);
+
+        for (size_t i = 0; i < pollFDs.size(); ++i) {
+            implementations.at(i)->dispatchEvents();
+        }
+    }
+}

src/backend/Wayland.cpp

@@ -0,0 +1,265 @@
+#include <aquamarine/backend/Wayland.hpp>
+#include <wayland.hpp>
+#include <xdg-shell.hpp>
+
+using namespace Aquamarine;
+using namespace Hyprutils::Memory;
+using namespace Hyprutils::Math;
+#define SP CSharedPointer
+
+Aquamarine::CWaylandBackend::~CWaylandBackend() {
+    ;
+}
+eBackendType Aquamarine::CWaylandBackend::type() {
+    return AQ_BACKEND_WAYLAND;
+}
+
+Aquamarine::CWaylandBackend::CWaylandBackend(Hyprutils::Memory::CSharedPointer<CBackend> backend_) : backend(backend_) {
+    ;
+}
+
+bool Aquamarine::CWaylandBackend::start() {
+    backend->log(AQ_LOG_DEBUG, "Starting the Wayland backend!");
+
+    waylandState.display = wl_display_connect(nullptr);
+
+    if (!waylandState.display) {
+        backend->log(AQ_LOG_ERROR, "Wayland backend cannot start: wl_display_connect failed (is a wayland compositor running?)");
+        return false;
+    }
+
+    waylandState.registry = makeShared<CWlRegistry>((wl_proxy*)wl_display_get_registry(waylandState.display));
+
+    backend->log(AQ_LOG_DEBUG, std::format("Got registry at 0x{:x}", (uintptr_t)waylandState.registry->resource()));
+
+    waylandState.registry->setGlobal([this](CWlRegistry* r, uint32_t id, const char* name, uint32_t version) {
+        backend->log(AQ_LOG_TRACE, std::format(" | received global: {} (version {}) with id {}", name, version, id));
+
+        const std::string NAME = name;
+
+        if (NAME == "wl_seat") {
+            backend->log(AQ_LOG_TRACE, std::format("  > binding to global: {} (version {}) with id {}", name, 9, id));
+            waylandState.seat = makeShared<CWlSeat>((wl_proxy*)wl_registry_bind((wl_registry*)waylandState.registry->resource(), id, &wl_seat_interface, 9));
+            initSeat();
+        } else if (NAME == "xdg_wm_base") {
+            backend->log(AQ_LOG_TRACE, std::format("  > binding to global: {} (version {}) with id {}", name, 6, id));
+            waylandState.xdg = makeShared<CXdgWmBase>((wl_proxy*)wl_registry_bind((wl_registry*)waylandState.registry->resource(), id, &xdg_wm_base_interface, 6));
+            initShell();
+        } else if (NAME == "wl_compositor") {
+            backend->log(AQ_LOG_TRACE, std::format("  > binding to global: {} (version {}) with id {}", name, 6, id));
+            waylandState.compositor = makeShared<CWlCompositor>((wl_proxy*)wl_registry_bind((wl_registry*)waylandState.registry->resource(), id, &wl_compositor_interface, 6));
+        }
+    });
+    waylandState.registry->setGlobalRemove([this](CWlRegistry* r, uint32_t id) { ; });
+
+    wl_display_roundtrip(waylandState.display);
+
+    if (!waylandState.xdg || !waylandState.compositor || !waylandState.seat) {
+        backend->log(AQ_LOG_ERROR, "Wayland backend cannot start: Missing protocols");
+        return false;
+    }
+
+    dispatchEvents();
+
+    createOutput("WAYLAND1");
+
+    return true;
+}
+
+void Aquamarine::CWaylandBackend::createOutput(const std::string& szName) {
+    outputs.emplace_back(SP<CWaylandOutput>(new CWaylandOutput(szName, self)));
+}
+
+int Aquamarine::CWaylandBackend::pollFD() {
+    if (!waylandState.display)
+        return -1;
+
+    return wl_display_get_fd(waylandState.display);
+}
+
+bool Aquamarine::CWaylandBackend::dispatchEvents() {
+    wl_display_flush(waylandState.display);
+
+    if (wl_display_prepare_read(waylandState.display) == 0) {
+        wl_display_read_events(waylandState.display);
+        wl_display_dispatch_pending(waylandState.display);
+    } else
+        wl_display_dispatch(waylandState.display);
+
+    int ret = 0;
+    do {
+        ret = wl_display_dispatch_pending(waylandState.display);
+        wl_display_flush(waylandState.display);
+    } while (ret > 0);
+
+    return true;
+}
+
+Aquamarine::CWaylandKeyboard::CWaylandKeyboard(Hyprutils::Memory::CSharedPointer<CWlKeyboard> keyboard_, Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend_) :
+    keyboard(keyboard_), backend(backend_) {
+    if (!keyboard->resource())
+        return;
+
+    backend->backend->log(AQ_LOG_DEBUG, "New wayland keyboard wl_keyboard");
+
+    keyboard->setKey([this](CWlKeyboard* r, uint32_t serial, uint32_t timeMs, uint32_t key, wl_keyboard_key_state state) {
+        events.key.emit(SKeyEvent{
+            .timeMs  = timeMs,
+            .key     = key,
+            .pressed = state == WL_KEYBOARD_KEY_STATE_PRESSED,
+        });
+    });
+
+    keyboard->setModifiers([this](CWlKeyboard* r, uint32_t serial, uint32_t depressed, uint32_t latched, uint32_t locked, uint32_t group) {
+        events.key.emit(SModifiersEvent{
+            .depressed = depressed,
+            .latched   = latched,
+            .locked    = locked,
+            .group     = group,
+        });
+    });
+}
+
+Aquamarine::CWaylandKeyboard::~CWaylandKeyboard() {
+    ;
+}
+
+const std::string& Aquamarine::CWaylandKeyboard::getName() {
+    return name;
+}
+
+Aquamarine::CWaylandPointer::CWaylandPointer(Hyprutils::Memory::CSharedPointer<CWlPointer> pointer_, Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend_) :
+    pointer(pointer_), backend(backend_) {
+    if (!pointer->resource())
+        return;
+
+    backend->backend->log(AQ_LOG_DEBUG, "New wayland pointer wl_pointer");
+
+    pointer->setMotion([this](CWlPointer* r, uint32_t serial, wl_fixed_t x, wl_fixed_t y) {
+        if (!backend->focusedOutput || !backend->focusedOutput->state->mode)
+            return;
+
+        Vector2D local = {wl_fixed_to_double(x), wl_fixed_to_double(y)};
+        local          = local / backend->focusedOutput->state->mode->pixelSize;
+
+        events.warp.emit(SWarpEvent{
+            .absolute = local,
+        });
+    });
+
+    pointer->setEnter([this](CWlPointer* r, uint32_t serial, wl_proxy* surface, wl_fixed_t x, wl_fixed_t y) {
+        backend->lastEnterSerial = serial;
+
+        for (auto& o : backend->outputs) {
+            if (o->waylandState.surface->resource() != surface)
+                continue;
+
+            backend->focusedOutput = o;
+            backend->backend->log(AQ_LOG_DEBUG, std::format("[wayland] focus changed: {}", o->name));
+            break;
+        }
+    });
+
+    pointer->setButton([this](CWlPointer* r, uint32_t serial, uint32_t timeMs, uint32_t button, wl_pointer_button_state state) {
+        events.button.emit(SButtonEvent{
+            .timeMs  = timeMs,
+            .button  = button,
+            .pressed = state == WL_POINTER_BUTTON_STATE_PRESSED,
+        });
+    });
+
+    pointer->setAxis([this](CWlPointer* r, uint32_t timeMs, wl_pointer_axis axis, wl_fixed_t value) {
+        events.axis.emit(SAxisEvent{
+            .timeMs = timeMs,
+            .axis   = axis == WL_POINTER_AXIS_HORIZONTAL_SCROLL ? AQ_POINTER_AXIS_HORIZONTAL : AQ_POINTER_AXIS_VERTICAL,
+            .value  = wl_fixed_to_double(value),
+        });
+    });
+
+    pointer->setFrame([this](CWlPointer* r) { events.frame.emit(); });
+}
+
+Aquamarine::CWaylandPointer::~CWaylandPointer() {
+    ;
+}
+
+const std::string& Aquamarine::CWaylandPointer::getName() {
+    return name;
+}
+
+void Aquamarine::CWaylandBackend::initSeat() {
+    waylandState.seat->setCapabilities([this](CWlSeat* r, wl_seat_capability cap) {
+        const bool HAS_KEYBOARD = ((uint32_t)cap) & WL_SEAT_CAPABILITY_KEYBOARD;
+        const bool HAS_POINTER  = ((uint32_t)cap) & WL_SEAT_CAPABILITY_POINTER;
+
+        if (HAS_KEYBOARD && keyboards.empty())
+            keyboards.emplace_back(makeShared<CWaylandKeyboard>(SP<CWlKeyboard>(waylandState.seat->sendGetKeyboard()), self));
+        else if (!HAS_KEYBOARD && !keyboards.empty())
+            keyboards.clear();
+
+        if (HAS_POINTER && pointers.empty())
+            keyboards.emplace_back(makeShared<CWaylandKeyboard>(SP<CWlKeyboard>(waylandState.seat->sendGetKeyboard()), self));
+        else if (!HAS_POINTER && !keyboards.empty())
+            keyboards.clear();
+    });
+}
+
+void Aquamarine::CWaylandBackend::initShell() {
+    waylandState.xdg->setPing([](CXdgWmBase* r, uint32_t serial) { r->sendPong(serial); });
+}
+
+Aquamarine::CWaylandOutput::CWaylandOutput(const std::string& name_, Hyprutils::Memory::CWeakPointer<CWaylandBackend> backend_) : name(name_), backend(backend_) {
+    errno = 0;
+
+    waylandState.surface = SP<CWlSurface>(backend->waylandState.compositor->sendCreateSurface());
+
+    if (!waylandState.surface->resource()) {
+        backend->backend->log(AQ_LOG_ERROR, std::format("Output {} failed: no surface given. Errno: {}", name, errno));
+        return;
+    }
+
+    waylandState.xdgSurface = SP<CXdgSurface>(backend->waylandState.xdg->sendGetXdgSurface(waylandState.surface->resource()));
+
+    if (!waylandState.xdgSurface->resource()) {
+        backend->backend->log(AQ_LOG_ERROR, std::format("Output {} failed: no xdgSurface given. Errno: {}", name, errno));
+        return;
+    }
+
+    waylandState.xdgSurface->setConfigure([this](CXdgSurface* r, uint32_t serial) {
+        backend->backend->log(AQ_LOG_DEBUG, std::format("Output {}: configure surface with {}", name, serial));
+        r->sendAckConfigure(serial);
+    });
+
+    waylandState.xdgToplevel = SP<CXdgToplevel>(waylandState.xdgSurface->sendGetToplevel());
+
+    if (!waylandState.xdgToplevel->resource()) {
+        backend->backend->log(AQ_LOG_ERROR, std::format("Output {} failed: no xdgToplevel given. Errno: {}", name, errno));
+        return;
+    }
+
+    waylandState.xdgToplevel->setWmCapabilities(
+        [this](CXdgToplevel* r, wl_array* arr) { backend->backend->log(AQ_LOG_DEBUG, std::format("Output {}: wm_capabilities received", name)); });
+
+    waylandState.xdgToplevel->setConfigure([this](CXdgToplevel* r, int32_t w, int32_t h, wl_array* arr) {
+        backend->backend->log(AQ_LOG_DEBUG, std::format("Output {}: configure toplevel with {}x{}", name, w, h));
+        events.state.emit(SStateEvent{.size = {w, h}});
+    });
+
+    waylandState.surface->sendAttach(nullptr, 0, 0);
+    waylandState.surface->sendCommit();
+
+    backend->backend->log(AQ_LOG_DEBUG, std::format("Output {}: initialized", name));
+}
+
+Aquamarine::CWaylandOutput::~CWaylandOutput() {
+    if (waylandState.xdgToplevel)
+        waylandState.xdgToplevel->sendDestroy();
+    if (waylandState.xdgSurface)
+        waylandState.xdgSurface->sendDestroy();
+    if (waylandState.surface)
+        waylandState.surface->sendDestroy();
+}
+
+void Aquamarine::CWaylandOutput::commit() {
+    ;
+}

src/buffer/Buffer.cpp

@@ -0,0 +1,41 @@
+#include <aquamarine/buffer/Buffer.hpp>
+#include "Shared.hpp"
+
+using namespace Aquamarine;
+
+SDMABUFAttrs Aquamarine::IBuffer::dmabuf() {
+    return SDMABUFAttrs{};
+}
+
+SSHMAttrs Aquamarine::IBuffer::shm() {
+    return SSHMAttrs{};
+}
+
+std::tuple<uint8_t*, uint32_t, size_t> Aquamarine::IBuffer::beginDataPtr(uint32_t flags) {
+    return {nullptr, 0, 0};
+}
+
+void Aquamarine::IBuffer::endDataPtr() {
+    ; // empty
+}
+
+void Aquamarine::IBuffer::sendRelease() {
+    ;
+}
+
+void Aquamarine::IBuffer::lock() {
+    locks++;
+}
+
+void Aquamarine::IBuffer::unlock() {
+    locks--;
+
+    ASSERT(locks >= 0);
+
+    if (locks <= 0)
+        sendRelease();
+}
+
+bool Aquamarine::IBuffer::locked() {
+    return locks;
+}

src/include/Shared.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <iostream>
+#include <format>
+#include <signal.h>
+
+#define RASSERT(expr, reason, ...)                                                                                                                                                 \
+    if (!(expr)) {                                                                                                                                                                 \
+        std::cout << std::format("\n==========================================================================================\nASSERTION FAILED! \n\n{}\n\nat: line {} in {}",    \
+                                 std::format(reason, ##__VA_ARGS__), __LINE__,                                                                                                     \
+                                 ([]() constexpr -> std::string { return std::string(__FILE__).substr(std::string(__FILE__).find_last_of('/') + 1); })());                         \
+        std::cout << "[Aquamarine] Assertion failed!";                                                                                                                             \
+        raise(SIGABRT);                                                                                                                                                            \
+    }
+
+#define ASSERT(expr) RASSERT(expr, "?")

tests/SimpleWindow.cpp

@@ -0,0 +1,41 @@
+#include <aquamarine/backend/Backend.hpp>
+#include <iostream>
+
+static const char* aqLevelToString(Aquamarine::eBackendLogLevel level) {
+    switch (level) {
+        case Aquamarine::eBackendLogLevel::AQ_LOG_TRACE: return "TRACE";
+        case Aquamarine::eBackendLogLevel::AQ_LOG_DEBUG: return "DEBUG";
+        case Aquamarine::eBackendLogLevel::AQ_LOG_ERROR: return "ERROR";
+        case Aquamarine::eBackendLogLevel::AQ_LOG_WARNING: return "WARNING";
+        case Aquamarine::eBackendLogLevel::AQ_LOG_CRITICAL: return "CRITICAL";
+        default: break;
+    }
+
+    return "UNKNOWN";
+}
+
+void aqLog(Aquamarine::eBackendLogLevel level, std::string msg) {
+    std::cout << "[AQ] [" << aqLevelToString(level) << "] " << msg << "\n";
+}
+
+int main(int argc, char** argv, char** envp) {
+    Aquamarine::SBackendOptions options;
+    options.logFunction = aqLog;
+
+    std::vector<Aquamarine::SBackendImplementationOptions> implementations;
+    Aquamarine::SBackendImplementationOptions waylandOptions;
+    waylandOptions.backendType = Aquamarine::eBackendType::AQ_BACKEND_WAYLAND;
+    waylandOptions.backendRequestMode = Aquamarine::eBackendRequestMode::AQ_BACKEND_REQUEST_IF_AVAILABLE;
+    implementations.emplace_back(waylandOptions);
+
+    auto aqBackend = Aquamarine::CBackend::create(implementations, options);
+
+    if (!aqBackend->start()) {
+        std::cout << "Failed to start the aq backend\n";
+        return 1;
+    }
+
+    aqBackend->enterLoop();
+
+    return 0;
+}