From 0c1cbf2d38cbd0db5c9cfb86559b4fc5e4acee0d Mon Sep 17 00:00:00 2001
From: Rye <rye@alchemyviewer.org>
Date: Thu, 30 Oct 2025 17:22:09 -0400
Subject: Add support for GLX and EGL to GL extension loader Fix dullahan
 wayland support Fix shader GL_ERROR under GL Core profile in Mesa

Signed-off-by: Rye <rye@alchemyviewer.org>
---
 indra/llwindow/CMakeLists.txt  |  2 +-
 indra/llwindow/llsdl.cpp       |  2 ++
 indra/llwindow/llwindowsdl.cpp | 57 ++++++++++++++++++++++++++++++++++++++++--
 indra/llwindow/llwindowsdl.h   | 33 ++++++++++++++++++++++++
 4 files changed, 91 insertions(+), 3 deletions(-)

(limited to 'indra/llwindow')

diff --git a/indra/llwindow/CMakeLists.txt b/indra/llwindow/CMakeLists.txt
index 1f846de35d..aacaef9257 100644
--- a/indra/llwindow/CMakeLists.txt
+++ b/indra/llwindow/CMakeLists.txt
@@ -160,7 +160,7 @@ if (BUILD_HEADLESS)
     ${llwindowheadless_HEADER_FILES}
     )
 
-  target_compile_definitions( llwindowheadless PUBLIC LL_MESA=1 LL_MESA_HEADLESS=1 )
+  target_compile_definitions( llwindowheadless PUBLIC LL_MESA_HEADLESS=1 )
 
   target_link_libraries (llwindowheadless
   llcommon
diff --git a/indra/llwindow/llsdl.cpp b/indra/llwindow/llsdl.cpp
index c97356ee80..d0a7552647 100644
--- a/indra/llwindow/llsdl.cpp
+++ b/indra/llwindow/llsdl.cpp
@@ -64,10 +64,12 @@ void sdl_logger(void *userdata, int category, SDL_LogPriority priority, const ch
 
 void init_sdl(const std::string& app_name)
 {
+#ifndef LL_SDL_APP
     if (!gSDLMainHandled)
     {
         SDL_SetMainReady();
     }
+#endif
 
     SDL_SetLogOutputFunction(&sdl_logger, nullptr);
 
diff --git a/indra/llwindow/llwindowsdl.cpp b/indra/llwindow/llwindowsdl.cpp
index 57110f8634..1cfb0b2acb 100644
--- a/indra/llwindow/llwindowsdl.cpp
+++ b/indra/llwindow/llwindowsdl.cpp
@@ -40,11 +40,11 @@
 #include "llpreeditor.h"
 #include "llsdl.h"
 
+#if LL_LINUX
 #ifdef LL_GLIB
 #include <glib.h>
 #endif
 
-#if LL_LINUX
 extern "C" {
 # include "fontconfig/fontconfig.h"
 }
@@ -55,6 +55,13 @@ extern "C" {
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <stdio.h>
+
+#if LL_X11
+LLWindowSDL::X11_DATA LLWindowSDL::sX11Data = {};
+#endif
+#if LL_WAYLAND
+LLWindowSDL::WAYLAND_DATA LLWindowSDL::sWaylandData = {};
+#endif
 #endif // LL_LINUX
 
 #if LL_DARWIN
@@ -248,7 +255,7 @@ bool LLWindowSDL::createContext(int x, int y, int width, int height, int bits, b
 
     if(mFullscreen)
     {
-        tryFindFullscreenSize( width, height );
+        tryFindFullscreenSize(width, height);
     }
 
     SDL_PropertiesID props = SDL_CreateProperties();
@@ -322,6 +329,52 @@ bool LLWindowSDL::createContext(int x, int y, int width, int height, int bits, b
         mRefreshRate = DEFAULT_REFRESH_RATE;
     }
 
+    /* Grab the window manager specific information */
+#if LL_LINUX
+    if (SDL_strcmp(SDL_GetCurrentVideoDriver(), "x11") == 0)
+    {
+        LL_INFOS() << "Running under X11" << LL_ENDL;
+        mServerProtocol = X11;
+
+        gGLManager.mIsX11 = true;
+
+#if LL_X11
+        sX11Data.xdisplay = (Display *)SDL_GetPointerProperty(SDL_GetWindowProperties(mWindow), SDL_PROP_WINDOW_X11_DISPLAY_POINTER, nullptr);
+        sX11Data.xwindow = (Window)SDL_GetNumberProperty(SDL_GetWindowProperties(mWindow), SDL_PROP_WINDOW_X11_WINDOW_NUMBER, 0);
+        sX11Data.xscreen = (int)SDL_GetNumberProperty(SDL_GetWindowProperties(mWindow), SDL_PROP_WINDOW_X11_SCREEN_NUMBER, -1);
+        if (sX11Data.xdisplay && sX11Data.xwindow)
+        {
+
+        }
+#endif
+
+        gGLManager.initGLX();
+    }
+    else if (SDL_strcmp(SDL_GetCurrentVideoDriver(), "wayland") == 0)
+    {
+        LL_INFOS() << "Running under Wayland" << LL_ENDL;
+        mServerProtocol = Wayland;
+
+        gGLManager.mIsWayland = true;
+
+#if LL_WAYLAND
+        sWaylandData.display = (struct wl_display *)SDL_GetPointerProperty(SDL_GetWindowProperties(mWindow), SDL_PROP_WINDOW_WAYLAND_DISPLAY_POINTER, nullptr);
+        sWaylandData.surface = (struct wl_surface *)SDL_GetPointerProperty(SDL_GetWindowProperties(mWindow), SDL_PROP_WINDOW_WAYLAND_SURFACE_POINTER, nullptr);
+        if (sWaylandData.display && sWaylandData.surface)
+        {
+        }
+#endif
+
+        gGLManager.initEGL();
+
+        // If set (XWayland) remove DISPLAY, this will prompt dullahan to also use Wayland
+        if(getenv("DISPLAY"))
+        {
+            unsetenv("DISPLAY");
+        }
+    }
+#endif
+
     SDL_GL_GetAttribute(SDL_GL_RED_SIZE, &redBits);
     SDL_GL_GetAttribute(SDL_GL_GREEN_SIZE, &greenBits);
     SDL_GL_GetAttribute(SDL_GL_BLUE_SIZE, &blueBits);
diff --git a/indra/llwindow/llwindowsdl.h b/indra/llwindow/llwindowsdl.h
index 966999ac12..8a8e9dd1bf 100644
--- a/indra/llwindow/llwindowsdl.h
+++ b/indra/llwindow/llwindowsdl.h
@@ -35,6 +35,15 @@
 #include "SDL3/SDL.h"
 #include "SDL3/SDL_endian.h"
 
+#ifdef LL_WAYLAND
+#include <wayland-client-protocol.h>
+#endif
+
+#if LL_X11
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#endif
+
 class LLPreeditor;
 
 class LLWindowSDL final : public LLWindow
@@ -217,6 +226,30 @@ private:
     U32 mKeyModifiers = SDL_KMOD_NONE;
 
     void tryFindFullscreenSize(int &aWidth, int &aHeight);
+
+    enum EServerProtocol{ X11, Wayland, Unknown };
+    EServerProtocol mServerProtocol = Unknown;
+public:
+#if LL_X11
+    // X11
+    struct X11_DATA
+    {
+        Display* xdisplay = nullptr;
+        Window xwindow = 0;
+        int xscreen = -1;
+    };
+    static X11_DATA sX11Data;
+#endif
+
+#if LL_WAYLAND
+    // Wayland
+    struct WAYLAND_DATA
+    {
+        struct wl_display* display = nullptr;
+        struct wl_surface* surface = nullptr;
+    };
+    static WAYLAND_DATA sWaylandData;
+#endif
 };
 
 class LLSplashScreenSDL : public LLSplashScreen
-- 
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