Intial Wayland EGL integration.

README.md

@@ -51,7 +51,7 @@ In `xdg-shell-protocol.cpp` - we need access to `xdg_wm_base_interface` so expor
 #### 3D Rendering
 
 ```bash
-sudo apt-get install libgl-dev
+sudo apt-get install libgl-dev libegl1-mesa-dev
 ```
 
 #### fonts

src/client/GuiApplication.cpp

@@ -84,13 +84,13 @@ void GuiApplication::Run()
 #ifdef __linux__
     mDesktopManager->SetKeyboard(XcbKeyboard::Create());
 
-    bool useOpenGl = false;
+    bool useHardwareRendering = false;
     XcbInterface window_interface;
-    window_interface.SetUseOpenGl(useOpenGl);
+    window_interface.setUseHardwareRendering(useHardwareRendering);
     window_interface.initialize(mDesktopManager.get());
     window_interface.addWindow(mainWindow, mDesktopManager.get());
     window_interface.showWindow(mainWindow);
-    if (useOpenGl)
+    if (useHardwareRendering)
     {
         window_interface.CreateOpenGlDrawable(mainWindow);
     }

src/graphics/CMakeLists.txt

@@ -18,6 +18,7 @@ list(APPEND graphics_HEADERS
     INativeDrawingContext.h
     )
 
+set(OpenGL_GL_PREFERENCE "GLVND")
 find_package(OpenGL QUIET)
 if (OpenGL_FOUND)
     list(APPEND platform_LIBS OpenGL::GL)

src/windows/CMakeLists.txt

@@ -40,8 +40,16 @@ if(UNIX)
                 ui_interfaces/wayland/WaylandPointerInterface.cpp
                 ui_interfaces/wayland/WaylandSeatInterface.cpp
                 ui_interfaces/wayland/WaylandKeyboard.cpp
+                ui_interfaces/wayland/WaylandEglInterface.cpp
+                ui_interfaces/wayland/WaylandEglWindowInterface.cpp
                 ${WAYLAND_EXTENSIONS_INCLUDE_DIR}/xdg-shell-protocol.cpp
                 )
+            set(OpenGL_GL_PREFERENCE "GLVND")
+            find_package(OpenGL QUIET)
+            if (OpenGL_FOUND)
+                list(APPEND platform_LIBS OpenGL::EGL)
+            endif()
+                
             set(_HAS_WAYLAND ON)
 		#else()
 			#message(STATUS "Wayland Extensions Header not found - not building Wayland support")	
@@ -87,7 +95,7 @@ target_include_directories(windows PUBLIC
                           ${X11_INCLUDE_DIRS}
                           )
 
-target_link_libraries(windows PUBLIC ${platform_LIBS} core geometry graphics ui_elements ${WAYLAND_CLIENT_LIBRARY})
+target_link_libraries(windows PUBLIC ${platform_LIBS} core geometry graphics ui_elements ${WAYLAND_CLIENT_LIBRARY} wayland-egl)
 target_compile_options(windows PRIVATE -Wno-attributes) # From xdg shell autogen code
 
 set_property(TARGET windows PROPERTY FOLDER src)

src/windows/ui_interfaces/AbstractUiInterface.h

@@ -20,4 +20,12 @@ public:
     virtual void showWindow(mt::Window* window) = 0;
 
     virtual void addWindow(mt::Window* window, DesktopManager* desktopManager) = 0;
+
+    void setUseHardwareRendering(bool useHardware)
+    {
+        mUseHardwareRendering = useHardware;
+    }
+
+protected:
+    bool mUseHardwareRendering{false};
 };

src/windows/ui_interfaces/wayland/WaylandEglInterface.h

@@ -0,0 +1,89 @@
+#pragma once
+
+#include <wayland-egl.h>
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+
+class WaylandEglInterface
+{
+public:
+
+    void initialize(wl_display* display)
+    {
+        mEglDisplay = eglGetDisplay((EGLNativeDisplayType) display);
+        if (mEglDisplay == EGL_NO_DISPLAY)
+        {
+            fprintf(stderr, "Can't create egl display\n");
+            return;
+        }
+        else
+        {
+            fprintf(stderr, "Created egl display\n");
+        }
+
+        EGLint major{0};
+        EGLint minor{0};
+        if (eglInitialize(mEglDisplay, &major, &minor) != EGL_TRUE)
+        {
+            fprintf(stderr, "Can't initialise egl display\n");
+            return;
+        }
+        printf("EGL major: %d, minor %d\n", major, minor);
+
+        EGLint count{0};
+        eglGetConfigs(mEglDisplay, nullptr, 0, &count);
+        printf("EGL has %d configs\n", count);
+
+        EGLConfig* configs;
+        configs = static_cast<EGLConfig*>(calloc(count, sizeof* configs));
+
+        EGLint n{0};
+        EGLint config_attribs[] = {
+                EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+                EGL_RED_SIZE, 8,
+                EGL_GREEN_SIZE, 8,
+                EGL_BLUE_SIZE, 8,
+                EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+                EGL_NONE
+        };
+        eglChooseConfig(mEglDisplay, config_attribs, configs, count, &n);
+        EGLint size{0};
+        for (int i = 0; i < n; i++)
+        {
+            eglGetConfigAttrib(mEglDisplay, configs[i], EGL_BUFFER_SIZE, &size);
+            printf("Buffer size for config %d is %d\n", i, size);
+            eglGetConfigAttrib(mEglDisplay, configs[i], EGL_RED_SIZE, &size);
+            printf("Red size for config %d is %d\n", i, size);
+
+            // just choose the first one
+            mEglConfig = configs[i];
+            break;
+        }
+
+        static const EGLint context_attribs[] = {
+                EGL_CONTEXT_CLIENT_VERSION, 2,
+                EGL_NONE
+        };
+        mEglContext = eglCreateContext(mEglDisplay, mEglConfig, EGL_NO_CONTEXT, context_attribs);
+    }
+
+    EGLDisplay getDisplay() const
+    {
+        return mEglDisplay;
+    }
+
+    EGLConfig getConfig() const
+    {
+        return mEglConfig;
+    }
+
+    EGLContext getContext() const
+    {
+        return mEglContext;
+    }
+
+private:
+    EGLDisplay mEglDisplay;
+    EGLConfig mEglConfig;
+    EGLContext mEglContext;
+};

src/windows/ui_interfaces/wayland/WaylandEglWindowInterface.h

@@ -0,0 +1,108 @@
+#pragma once
+
+#include "WaylandEglInterface.h"
+
+#include <wayland-egl.h>
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+
+class WaylandEglWindowInterface
+{
+public:
+
+    WaylandEglWindowInterface(WaylandEglInterface* eglInterface)
+        : mEglInterface(eglInterface)
+    {
+
+    }
+
+    void initialize(wl_surface* surface, int width, int height)
+    {
+        if (mEglSurface)
+        {
+            return;
+        }
+
+        mEglWindow = wl_egl_window_create(surface, width, height);
+        if (mEglWindow == EGL_NO_SURFACE)
+        {
+            fprintf(stderr, "Can't create egl window\n");
+            return;
+        }
+        else
+        {
+            fprintf(stderr, "Created egl window\n");
+        }
+
+        mEglSurface = eglCreateWindowSurface(mEglInterface->getDisplay(), mEglInterface->getConfig(), mEglWindow, nullptr);
+
+        if (!mEglSurface)
+        {
+            switch(eglGetError())
+            {
+                //case EGL_NO_SURFACE:
+                    //fprintf(stderr, "EGL_NO_SURFACE\n");
+                    //break;
+                case EGL_BAD_DISPLAY:
+                    fprintf(stderr, "EGL_BAD_DISPLAY\n");
+                    break;
+                case EGL_NOT_INITIALIZED:
+                    fprintf(stderr, "EGL_NOT_INITIALIZED\n");
+                    break;
+                case EGL_BAD_CONFIG:
+                    fprintf(stderr, "EGL_BAD_CONFIG\n");
+                    break;
+                case EGL_BAD_NATIVE_WINDOW:
+                    fprintf(stderr, "EGL_BAD_NATIVE_WINDOW\n");
+                    break;
+                case EGL_BAD_ATTRIBUTE:
+                    fprintf(stderr, "EGL_BAD_ATTRIBUTE\n");
+                    break;
+                case EGL_BAD_ALLOC:
+                    fprintf(stderr, "EGL_BAD_ALLOC\n");
+                    break;
+                case EGL_BAD_MATCH:
+                    fprintf(stderr, "EGL_BAD_MATCH\n");
+                    break;
+                default:
+                    fprintf(stderr, "Unknown EGL error\n");
+            }
+
+            fprintf(stderr, "Created surface failed\n");
+        }
+
+    }
+
+    void draw()
+    {
+        if (!mEglSurface)
+        {
+            return;
+        }
+
+        if (eglMakeCurrent(mEglInterface->getDisplay(), mEglSurface, mEglSurface, mEglInterface->getContext()))
+        {
+            fprintf(stderr, "Made current\n");
+        }
+        else {
+            fprintf(stderr, "Made current failed\n");
+        }
+
+        glClearColor(1.0, 1.0, 0.0, 1.0);
+        glClear(GL_COLOR_BUFFER_BIT);
+        glFlush();
+
+        if (eglSwapBuffers(mEglInterface->getDisplay(), mEglSurface))
+        {
+            fprintf(stderr, "Swapped buffers\n");
+        }
+        else {
+            fprintf(stderr, "Swapped buffers failed\n");
+        }
+    }
+
+private:
+    wl_egl_window* mEglWindow{nullptr};
+    EGLSurface mEglSurface;
+    WaylandEglInterface* mEglInterface;
+};

src/windows/ui_interfaces/wayland/WaylandKeyboard.cpp

@@ -25,7 +25,7 @@ void WaylandKeyboard::keyboardPressedEvent(void *data, struct wl_keyboard *wl_ke
 
 static void wl_keyboard_leave(void *data, struct wl_keyboard *wl_keyboard, uint32_t serial, struct wl_surface *surface)
 {
-    fprintf(stderr, "keyboard leave\n");
+
 }
 
 static void wl_keyboard_repeat_info(void *data, struct wl_keyboard *wl_keyboard, int32_t rate, int32_t delay)
@@ -46,8 +46,6 @@ void WaylandKeyboard::onKeyboardModifier(uint32_t mods_depressed, uint32_t mods_
 
 void WaylandKeyboard::onEnterEvent(struct wl_array *keys)
 {
-    MLOG_INFO("keyboard enter; keys pressed are:");
-
     void* key;
     wl_array_for_each(key, keys)
     {
@@ -56,9 +54,9 @@ void WaylandKeyboard::onEnterEvent(struct wl_array *keys)
         char buf[128];
         xkb_keysym_t sym = xkb_state_key_get_one_sym(mXkbState, *key_type + 8);
         xkb_keysym_get_name(sym, buf, sizeof(buf));
-        fprintf(stderr, "sym: %-12s (%d), ", buf, sym);
+        //fprintf(stderr, "sym: %-12s (%d), ", buf, sym);
         xkb_state_key_get_utf8(mXkbState, *key_type + 8, buf, sizeof(buf));
-        fprintf(stderr, "utf8: '%s'\n", buf);
+        //fprintf(stderr, "utf8: '%s'\n", buf);
     }
 }
 
@@ -69,9 +67,9 @@ void WaylandKeyboard::onPressedEvent(uint32_t key, uint32_t state)
     xkb_keysym_t sym = xkb_state_key_get_one_sym(mXkbState, keycode);
     xkb_keysym_get_name(sym, buf, sizeof(buf));
     const char *action = state == WL_KEYBOARD_KEY_STATE_PRESSED ? "press" : "release";
-    fprintf(stderr, "key %s: sym: %-12s (%d), ", action, buf, sym);
+    //fprintf(stderr, "key %s: sym: %-12s (%d), ", action, buf, sym);
     xkb_state_key_get_utf8(mXkbState, keycode, buf, sizeof(buf));
-    fprintf(stderr, "utf8: '%s'\n", buf);
+    //fprintf(stderr, "utf8: '%s'\n", buf);
 }
 
 void WaylandKeyboard::onKeymapEvent(struct wl_keyboard *wl_keyboard, uint32_t format, int32_t fd, uint32_t size)

src/windows/ui_interfaces/wayland/WaylandPointerInterface.cpp

@@ -63,11 +63,10 @@ void WaylandPointerInterface::onPointerFrame()
     {
         const auto locx = wl_fixed_to_double(mWorkingPointerEvent.surface_x);
         const auto locy = wl_fixed_to_double(mWorkingPointerEvent.surface_y);
-        MLOG_INFO("Enter at " << locx << " , " << locy);
     }
     else if (mWorkingPointerEvent.event_mask & POINTER_EVENT_LEAVE)
     {
-        MLOG_INFO("Leave);")
+
     }
     else if (mWorkingPointerEvent.event_mask & POINTER_EVENT_MOTION)
     {
@@ -76,7 +75,6 @@ void WaylandPointerInterface::onPointerFrame()
     else if (mWorkingPointerEvent.event_mask & POINTER_EVENT_BUTTON)
     {
         const bool released = mWorkingPointerEvent.state == WL_POINTER_BUTTON_STATE_RELEASED;
-        MLOG_INFO("Mouse button" << released ? "released" : "pressed");
     }
     mWorkingPointerEvent = WaylandPointerEvent();
 }

src/windows/ui_interfaces/wayland/WaylandSurface.cpp

@@ -1,5 +1,7 @@
 #include "WaylandSurface.h"
 
+#include "WaylandEglWindowInterface.h"
+
 WaylandSurface::WaylandSurface(mt::Window* window)
     : mWindow(window)
 {
@@ -11,9 +13,13 @@ WaylandSurface::~WaylandSurface()
 
 }
 
-void WaylandSurface::initialize(wl_compositor* compositor, xdg_wm_base* xdg_wm_base, std::shared_ptr<WaylandBuffer> buffer)
+void WaylandSurface::initialize(wl_compositor* compositor, xdg_wm_base* xdg_wm_base, std::shared_ptr<WaylandBuffer> buffer, WaylandEglInterface* eglInterface)
 {
     mBuffer = buffer;
+    if (eglInterface)
+    {
+        mEglWindowInterface = std::make_unique<WaylandEglWindowInterface>(eglInterface);
+    }
 
     mSurface = wl_compositor_create_surface(compositor);
     mXdgSurface = xdg_wm_base_get_xdg_surface(xdg_wm_base, mSurface);
@@ -31,17 +37,29 @@ void WaylandSurface::initialize(wl_compositor* compositor, xdg_wm_base* xdg_wm_b
     xdg_toplevel_set_title(mXdgTopLevel, "Example client");
 
     wl_surface_commit(mSurface);
+
+    auto region = wl_compositor_create_region(compositor);
+    wl_region_add(region, 0, 0, mWindow->GetWidth(), mWindow->GetHeight());
+    wl_surface_set_opaque_region(mSurface, region);
 }
 
 void WaylandSurface::onConfigure(xdg_surface *xdg_surface, uint32_t serial)
 {
     xdg_surface_ack_configure(xdg_surface, serial);
 
+    if (mEglWindowInterface)
+    {
+        mEglWindowInterface->initialize(mSurface, mWindow->GetWidth(), mWindow->GetHeight());
+        mEglWindowInterface->draw();
+    }
+    else
+    {
         auto buffer = drawFrame();
         wl_surface_attach(mSurface, buffer, 0, 0);
         //wl_surface_damage(mSurface, 0, 0, UINT32_MAX, UINT32_MAX);
         wl_surface_commit(mSurface);
     }
+}
 
 wl_buffer* WaylandSurface::drawFrame()
 {

src/windows/ui_interfaces/wayland/WaylandSurface.h

@@ -5,12 +5,15 @@
 
 #include "Window.h"
 #include "SharedMemory.h"
-#include <WaylandBuffer.h>
+#include "WaylandBuffer.h"
 
 struct wl_surface;
 struct xdg_surface;
 struct xdg_toplevel;
 
+class WaylandEglInterface;
+class WaylandEglWindowInterface;
+
 class WaylandSurface
 {
 
@@ -19,7 +22,7 @@ public:
 
     ~WaylandSurface();
 
-    void initialize(wl_compositor* compositor, xdg_wm_base* xdg_wm_base, std::shared_ptr<WaylandBuffer> buffer);
+    void initialize(wl_compositor* compositor, xdg_wm_base* xdg_wm_base, std::shared_ptr<WaylandBuffer> buffer, WaylandEglInterface* eglInterface);
 
     void onConfigure(xdg_surface *xdg_surface, uint32_t serial);
 
@@ -37,6 +40,7 @@ private:
     xdg_toplevel* mXdgTopLevel{nullptr};
 
     std::shared_ptr<WaylandBuffer> mBuffer;
+    std::unique_ptr<WaylandEglWindowInterface> mEglWindowInterface{nullptr};
 };
 
 using WaylandSurfacePtr = std::unique_ptr<WaylandSurface>;

src/windows/ui_interfaces/wayland/WaylandWindowInterface.cpp

@@ -4,6 +4,7 @@
 #include "WaylandSurface.h"
 #include "WaylandBuffer.h"
 #include "WaylandSeatInterface.h"
+#include "WaylandEglInterface.h"
 
 #include <cstring>
 #include <sstream>
@@ -72,6 +73,12 @@ void WaylandWindowInterface::initialize(DesktopManager* desktopManager)
 
     wl_registry_add_listener(registry, &mRegistryListener, this);
     wl_display_roundtrip(mDisplay);
+
+    if (mUseHardwareRendering)
+    {
+        mEglInterface = std::make_unique<WaylandEglInterface>();
+        mEglInterface->initialize(mDisplay);
+    }
 }
 
 void WaylandWindowInterface::setSeat(wl_seat* seat)
@@ -119,7 +126,7 @@ void WaylandWindowInterface::showWindow(mt::Window* window)
         return;
     }
 
-    mSurfaces[0]->initialize(mCompositor, mXdgBase, mBuffer);
+    mSurfaces[0]->initialize(mCompositor, mXdgBase, mBuffer, mEglInterface.get());
 }
 
 void WaylandWindowInterface::shutDown()

src/windows/ui_interfaces/wayland/WaylandWindowInterface.h

@@ -13,6 +13,7 @@
 class WaylandSurface;
 class WaylandBuffer;
 class WaylandSeatInterface;
+class WaylandEglInterface;
 
 class WaylandWindowInterface : public AbstractUIInterface
 {
@@ -56,4 +57,5 @@ private:
     std::vector<std::unique_ptr<WaylandSurface> > mSurfaces;
     std::shared_ptr<WaylandBuffer> mBuffer;
     std::unique_ptr<WaylandSeatInterface> mSeatInterface;
+    std::unique_ptr<WaylandEglInterface> mEglInterface;
 };

src/windows/ui_interfaces/x11/XcbInterface.cpp

@@ -21,8 +21,7 @@
 
 
 XcbInterface::XcbInterface()
-    : mUseOpenGl(true),
-      mConnection(nullptr),
+      : mConnection(nullptr),
         mX11Display(),
         mGlxInterface(),
         mXcbEventInterface(XcbEventInterface::Create()),
@@ -36,17 +35,12 @@ XcbInterface::~XcbInterface()
 
 }
 
-void XcbInterface::SetUseOpenGl(bool use)
-{
-    mUseOpenGl = use;
-}
-
 void XcbInterface::initialize(DesktopManager* desktopManager)
 {
     Connect();
     UpdateScreen(desktopManager);
     CreateGraphicsContext(desktopManager);
-    if (mUseOpenGl)
+    if (mUseHardwareRendering)
     {
         InitializeOpenGl();
     }
@@ -54,7 +48,7 @@ void XcbInterface::initialize(DesktopManager* desktopManager)
 
 void XcbInterface::Connect()
 {
-    if (mUseOpenGl)
+    if (mUseHardwareRendering)
     {
         mX11Display = XOpenDisplay(0);
         if (!mX11Display)
@@ -84,7 +78,7 @@ void XcbInterface::UpdateScreen(DesktopManager* desktopManager)
         return;
     }
     auto screen_iter = xcb_setup_roots_iterator(xcb_get_setup(mConnection));
-    if (mUseOpenGl)
+    if (mUseHardwareRendering)
     {
         if (!mX11Display)
         {
@@ -109,7 +103,7 @@ void XcbInterface::InitializeOpenGl()
 
 void XcbInterface::CreateOpenGlDrawable(mt::Window* window)
 {
-    if (!mUseOpenGl or !window or !window->GetPlatformWindow())
+    if (!mUseHardwareRendering or !window or !window->GetPlatformWindow())
     {
         return;
     }
@@ -181,7 +175,7 @@ void XcbInterface::onPaint(DesktopManager* desktopManager)
 void XcbInterface::OnExposeEvent(xcb_expose_event_t* event, DesktopManager* desktopManager)
 {
     // Update the window
-    if (mUseOpenGl)
+    if (mUseHardwareRendering)
     {
         mGlxInterface->Draw();
         mGlxInterface->SwapBuffers(mX11Display);
@@ -247,7 +241,7 @@ void XcbInterface::loop(DesktopManager* desktopManager)
 
 void XcbInterface::OnLoopCompleted(DesktopManager* desktopManagers)
 {
-    if (mUseOpenGl)
+    if (mUseHardwareRendering)
     {
         mGlxInterface->DestroyWindow(mX11Display);
         mGlxInterface->DestroyContext(mX11Display);

src/windows/ui_interfaces/x11/XcbInterface.h

@@ -31,8 +31,6 @@ public:
 
     ~XcbInterface();
 
-    void SetUseOpenGl(bool use);
-
     void initialize(DesktopManager* desktopManager) override;
 
     void loop(DesktopManager* desktopManager) override;
@@ -66,7 +64,6 @@ private:
     void OnLoopCompleted(DesktopManager* desktopManagers);
 
 private:
-    bool mUseOpenGl {false};
     xcb_connection_t* mConnection;
     _XDisplay* mX11Display;
     GlxInterfacePtr mGlxInterface;

test/CMakeLists.txt

@@ -38,6 +38,7 @@ list(APPEND TestFiles
     )
 endif()
 
+set(OpenGL_GL_PREFERENCE "GLVND")
 find_package(OpenGL QUIET)
 if (OpenGL_FOUND)
 list(APPEND TestFiles 

test/graphics/TestOpenGlRendering.cpp

@@ -20,7 +20,7 @@ public:
 
         bool useOpenGl = true;
         XcbInterface window_interface;
-        window_interface.SetUseOpenGl(true);
+        window_interface.setUseHardwareRendering(true);
         window_interface.initialize(desktopManager.get());
         window_interface.addWindow(mainWindow, desktopManager.get());
         window_interface.showWindow(mainWindow);

test/windows/TestWaylandWindow.cpp

@@ -12,6 +12,7 @@ int main()
     auto desktop_manager = std::make_unique<DesktopManager>();
 
     WaylandWindowInterface window_interface;
+    window_interface.setUseHardwareRendering(true);
     window_interface.initialize(desktop_manager.get());
 
     auto window = mt::Window::Create();