GLContext: Dynamically load wayland-egl

cyrilus31 · Jul 25, 2022 · c233a80 · c233a80
1 parent 5d89715
commit c233a80
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Showing 5 changed files with 46 additions and 11 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -119,9 +119,6 @@ if(USE_X11)
   endif()
 endif()
 if(USE_WAYLAND)
-  find_package(ECM REQUIRED NO_MODULE)
-  list(APPEND CMAKE_MODULE_PATH "${ECM_MODULE_PATH}")
-  find_package(Wayland REQUIRED Egl)
   message(STATUS "Wayland support enabled")
 endif()
 if(USE_DRMKMS AND USE_FBDEV)

diff --git a/scripts/make-appimage.sh b/scripts/make-appimage.sh
@@ -59,6 +59,8 @@ declare -a SYSLIBS=(
 	"libwrap.so.0"
 	"libharfbuzz.so.0"
 	"libFLAC.so.8"
+	"libX11.so.6"
+	"libX11-xcb.so.1"
 	"libXau.so.6"
 	"libXcomposite.so.1"
 	"libXcursor.so.1"

diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
@@ -205,7 +205,6 @@ if(USE_WAYLAND)
     gl/context_egl_wayland.h
   )
   target_compile_definitions(common PRIVATE "-DUSE_WAYLAND=1")
-  target_link_libraries(common PRIVATE Wayland::Egl)
 endif()
 
 if(APPLE)

diff --git a/src/common/gl/context_egl_wayland.cpp b/src/common/gl/context_egl_wayland.cpp
@@ -1,19 +1,25 @@
 #include "context_egl_wayland.h"
-#include <wayland-egl.h>
+#include "../log.h"
+#include <dlfcn.h>
+Log_SetChannel(ContextEGLWayland);
 
 namespace GL {
+static const char* WAYLAND_EGL_MODNAME = "libwayland-egl.so.1";
+
 ContextEGLWayland::ContextEGLWayland(const WindowInfo& wi) : ContextEGL(wi) {}
 ContextEGLWayland::~ContextEGLWayland()
 {
   if (m_wl_window)
-    wl_egl_window_destroy(m_wl_window);
+    m_wl_egl_window_destroy(m_wl_window);
+  if (m_wl_module)
+    dlclose(m_wl_module);
 }
 
 std::unique_ptr<Context> ContextEGLWayland::Create(const WindowInfo& wi, const Version* versions_to_try,
                                                    size_t num_versions_to_try)
 {
   std::unique_ptr<ContextEGLWayland> context = std::make_unique<ContextEGLWayland>(wi);
-  if (!context->Initialize(versions_to_try, num_versions_to_try))
+  if (!context->LoadModule() || !context->Initialize(versions_to_try, num_versions_to_try))
     return nullptr;
 
   return context;
@@ -24,7 +30,7 @@ std::unique_ptr<Context> ContextEGLWayland::CreateSharedContext(const WindowInfo
   std::unique_ptr<ContextEGLWayland> context = std::make_unique<ContextEGLWayland>(wi);
   context->m_display = m_display;
 
-  if (!context->CreateContextAndSurface(m_version, m_context, false))
+  if (!context->LoadModule() || !context->CreateContextAndSurface(m_version, m_context, false))
     return nullptr;
 
   return context;
@@ -33,7 +39,7 @@ std::unique_ptr<Context> ContextEGLWayland::CreateSharedContext(const WindowInfo
 void ContextEGLWayland::ResizeSurface(u32 new_surface_width, u32 new_surface_height)
 {
   if (m_wl_window)
-    wl_egl_window_resize(m_wl_window, new_surface_width, new_surface_height, 0, 0);
+    m_wl_egl_window_resize(m_wl_window, new_surface_width, new_surface_height, 0, 0);
 
   ContextEGL::ResizeSurface(new_surface_width, new_surface_height);
 }
@@ -42,15 +48,39 @@ EGLNativeWindowType ContextEGLWayland::GetNativeWindow(EGLConfig config)
 {
   if (m_wl_window)
   {
-    wl_egl_window_destroy(m_wl_window);
+    m_wl_egl_window_destroy(m_wl_window);
     m_wl_window = nullptr;
   }
 
   m_wl_window =
-    wl_egl_window_create(static_cast<wl_surface*>(m_wi.window_handle), m_wi.surface_width, m_wi.surface_height);
+    m_wl_egl_window_create(static_cast<wl_surface*>(m_wi.window_handle), m_wi.surface_width, m_wi.surface_height);
   if (!m_wl_window)
     return {};
 
   return reinterpret_cast<EGLNativeWindowType>(m_wl_window);
 }
+
+bool ContextEGLWayland::LoadModule()
+{
+  m_wl_module = dlopen(WAYLAND_EGL_MODNAME, RTLD_NOW | RTLD_GLOBAL);
+  if (!m_wl_module)
+  {
+    Log_ErrorPrintf("Failed to load %s.", WAYLAND_EGL_MODNAME);
+    return false;
+  }
+
+  m_wl_egl_window_create =
+    reinterpret_cast<decltype(m_wl_egl_window_create)>(dlsym(m_wl_module, "wl_egl_window_create"));
+  m_wl_egl_window_destroy =
+    reinterpret_cast<decltype(m_wl_egl_window_destroy)>(dlsym(m_wl_module, "wl_egl_window_destroy"));
+  m_wl_egl_window_resize =
+    reinterpret_cast<decltype(m_wl_egl_window_resize)>(dlsym(m_wl_module, "wl_egl_window_resize"));
+  if (!m_wl_egl_window_create || !m_wl_egl_window_destroy || !m_wl_egl_window_resize)
+  {
+    Log_ErrorPrintf("Failed to load one or more functions from %s.", WAYLAND_EGL_MODNAME);
+    return false;
+  }
+
+  return true;
+}
 } // namespace GL
diff --git a/src/common/gl/context_egl_wayland.h b/src/common/gl/context_egl_wayland.h
@@ -20,7 +20,14 @@ class ContextEGLWayland final : public ContextEGL
   EGLNativeWindowType GetNativeWindow(EGLConfig config) override;
 
 private:
+  bool LoadModule();
+
   wl_egl_window* m_wl_window = nullptr;
+
+  void* m_wl_module = nullptr;
+  wl_egl_window* (*m_wl_egl_window_create)(struct wl_surface* surface, int width, int height);
+  void (*m_wl_egl_window_destroy)(struct wl_egl_window* egl_window);
+  void (*m_wl_egl_window_resize)(struct wl_egl_window* egl_window, int width, int height, int dx, int dy);
 };
 
 } // namespace GL