GL/Context: Support fbdev

CMakeLists.txt

@@ -37,7 +37,8 @@ if(LINUX OR ANDROID)
   option(USE_EGL "Support EGL OpenGL context creation" ON)
 endif()
 if(LINUX AND NOT ANDROID)
-  option(USE_DRMKMS "Support DRM/KMS display and contexts" OFF)
+  option(USE_DRMKMS "Support DRM/KMS OpenGL contexts" OFF)
+  option(USE_FBDEV "Support FBDev OpenGL contexts" OFF)
 endif()
 
 # Force EGL when using Wayland
@@ -115,11 +116,17 @@ if(USE_WAYLAND)
   find_package(Wayland REQUIRED Egl)
   message(STATUS "Wayland support enabled")
 endif()
+if(USE_DRMKMS AND USE_FBDEV)
+  message(FATAL_ERROR "Only one of DRM/KMS and FBDev can be enabled")
+endif()
 if(USE_DRMKMS)
   find_package(GBM REQUIRED)
   find_package(Libdrm REQUIRED)
   message(STATUS "DRM/KMS support enabled")
 endif()
+if(USE_FBDEV)
+  message(STATUS "FBDev Support enabled")
+endif()
 
 # Set _DEBUG macro for Debug builds.
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG")

src/common/CMakeLists.txt

@@ -182,6 +182,13 @@ if(USE_EGL)
     )
     target_link_libraries(common PUBLIC GBM::GBM)
   endif()
+  if(USE_FBDEV)
+    target_compile_definitions(common PRIVATE "-DUSE_FBDEV=1")
+    target_sources(common PRIVATE
+      gl/context_egl_fbdev.cpp
+      gl/context_egl_fbdev.h
+    )
+  endif()
 endif()
 
 if(USE_X11)

src/common/gl/context.cpp

@@ -16,13 +16,16 @@ Log_SetChannel(GL::Context);
 #endif
 
 #ifdef USE_EGL
-#if defined(USE_WAYLAND) || defined(USE_GBM) || defined(USE_X11)
+#if defined(USE_WAYLAND) || defined(USE_GBM) || defined(USE_FBDEV) || defined(USE_X11)
 #if defined(USE_WAYLAND)
 #include "context_egl_wayland.h"
 #endif
 #if defined(USE_GBM)
 #include "context_egl_gbm.h"
 #endif
+#if defined(USE_FBDEV)
+#include "context_egl_fbdev.h"
+#endif
 #if defined(USE_X11)
 #include "context_egl_x11.h"
 #endif
@@ -129,6 +132,11 @@ std::unique_ptr<GL::Context> Context::Create(const WindowInfo& wi, const Version
     context = ContextEGLGBM::Create(wi, versions_to_try, num_versions_to_try);
 #endif
 
+#if defined(USE_FBDEV)
+  if (wi.type == WindowInfo::Type::Display)
+    context = ContextEGLFBDev::Create(wi, versions_to_try, num_versions_to_try);
+#endif
+
   if (!context)
     return nullptr;
 

src/duckstation-nogui/CMakeLists.txt

@@ -18,7 +18,7 @@ if(USE_SDL2)
   target_link_libraries(duckstation-nogui PRIVATE ${SDL2_LIBRARIES})
 endif()
 
-if(USE_DRMKMS)
+if(USE_DRMKMS OR USE_FBDEV)
   find_package(LIBEVDEV REQUIRED)
 
   target_sources(duckstation-nogui PRIVATE