Enable unified driver with all devices

source/Irrlicht/CMakeLists.txt

@@ -199,8 +199,6 @@ if(ENABLE_OPENGL3)
 	if (NOT USE_SDL2)
 		message(FATAL_ERROR "OpenGL 3 driver requires SDL2")
 	endif()
-	set(USE_SDLGL ON)
-	set(USE_SDLGL3 ON)
 endif()
 
 if(ENABLE_GLES1)
@@ -216,12 +214,8 @@ endif()
 
 if(ENABLE_GLES2)
 	add_definitions(-D_IRR_COMPILE_WITH_OGLES2_)
-	set(OPENGLES2_DIRECT_LINK TRUE) # not yet possible to remove this
 	if(DEVICE MATCHES "^(WINDOWS|X11|ANDROID)$" OR EMSCRIPTEN)
 		add_definitions(-D_IRR_COMPILE_WITH_EGL_MANAGER_)
-	elseif(DEVICE STREQUAL "SDL")
-		set(USE_SDLGL ON)
-		set(USE_SDLGLES2 ON)
 	endif()
 endif()
 
@@ -243,10 +237,8 @@ message(STATUS "Device: ${DEVICE}")
 message(STATUS "OpenGL: ${ENABLE_OPENGL}")
 message(STATUS "OpenGL 3: ${ENABLE_OPENGL3}")
 message(STATUS "OpenGL ES: ${ENABLE_GLES1}")
-if (USE_SDLGLES2)
+if (ENABLE_GLES2)
 	message(STATUS "OpenGL ES 2: ON (unified)")
-elseif (ENABLE_GLES2)
-	message(STATUS "OpenGL ES 2: ON (legacy)")
 else()
 	message(STATUS "OpenGL ES 2: OFF")
 endif()
@@ -347,6 +339,8 @@ set(IRRDRVROBJ
 	mt_opengl_loader.cpp
 )
 
+# the two legacy drivers
+
 if(ENABLE_OPENGL)
 	set(IRRDRVROBJ
 		${IRRDRVROBJ}
@@ -365,6 +359,33 @@ if(ENABLE_GLES1)
 	)
 endif()
 
+# the unified drivers
+
+if(ENABLE_OPENGL3 OR ENABLE_GLES2)
+	set(IRRDRVROBJ
+		${IRRDRVROBJ}
+		OpenGL/Driver.cpp
+		OpenGL/ExtensionHandler.cpp
+		OpenGL/FixedPipelineRenderer.cpp
+		OpenGL/MaterialRenderer.cpp
+		OpenGL/Renderer2D.cpp
+	)
+endif()
+
+if(ENABLE_OPENGL3)
+	set(IRRDRVROBJ
+		${IRRDRVROBJ}
+		OpenGL3/Driver.cpp
+	)
+endif()
+
+if(ENABLE_GLES2)
+	set(IRRDRVROBJ
+		${IRRDRVROBJ}
+		OpenGLES2/Driver.cpp
+	)
+endif()
+
 set(IRRIMAGEOBJ
 	CColorConverter.cpp
 	CImage.cpp
@@ -382,37 +403,6 @@ add_library(IRRVIDEOOBJ OBJECT
 	${IRRIMAGEOBJ}
 )
 
-if(USE_SDLGL)
-	target_sources(IRRVIDEOOBJ PRIVATE
-		OpenGL/Driver.cpp
-		OpenGL/ExtensionHandler.cpp
-		OpenGL/FixedPipelineRenderer.cpp
-		OpenGL/MaterialRenderer.cpp
-		OpenGL/Renderer2D.cpp
-	)
-endif()
-
-if(USE_SDLGL3)
-	target_sources(IRRVIDEOOBJ PRIVATE
-		OpenGL3/Driver.cpp
-	)
-endif()
-
-if(USE_SDLGLES2)
-	target_sources(IRRVIDEOOBJ PRIVATE
-		OpenGLES2/Driver.cpp
-	)
-elseif(ENABLE_GLES2)
-	target_sources(IRRVIDEOOBJ PRIVATE
-		COGLES2Driver.cpp
-		COGLES2ExtensionHandler.cpp
-		COGLES2FixedPipelineRenderer.cpp
-		COGLES2MaterialRenderer.cpp
-		COGLES2Renderer2D.cpp
-		CWebGL1Driver.cpp
-	)
-endif()
-
 add_library(IRRIOOBJ OBJECT
 	CFileList.cpp
 	CFileSystem.cpp
@@ -519,7 +509,6 @@ target_link_libraries(IrrlichtMt PRIVATE
 
 	"$<$<BOOL:${OPENGL_DIRECT_LINK}>:${OPENGL_LIBRARIES}>"
 	"$<$<BOOL:${OPENGLES_DIRECT_LINK}>:${OPENGLES_LIBRARY}>"
-	"$<$<BOOL:${OPENGLES2_DIRECT_LINK}>:${OPENGLES2_LIBRARIES}>"
 	${EGL_LIBRARY}
 
 	"$<$<PLATFORM_ID:Android>:-landroid -llog>"

source/Irrlicht/COpenGLCommon.h

@@ -6,7 +6,7 @@
 
 #ifdef _IRR_COMPILE_WITH_OPENGL_
 
-#if defined(_IRR_WINDOWS_API_)
+#if defined(_IRR_COMPILE_WITH_WINDOWS_DEVICE_)
 	#define WIN32_LEAN_AND_MEAN
 	#include <windows.h>
 		#define GL_GLEXT_LEGACY 1

source/Irrlicht/OpenGL/Common.h

@@ -5,9 +5,21 @@
 
 #pragma once
 
-#define GL_GLEXT_PROTOTYPES
+#include "irrTypes.h"
+// even though we have mt_opengl.h our driver code still uses GL_* constants
+#if defined(_IRR_COMPILE_WITH_WINDOWS_DEVICE_)
+	#include <GL/gl.h>
+	#include <GL/glext.h>
+#elif defined(_IRR_COMPILE_WITH_OSX_DEVICE_)
+	#include <OpenGL/gl.h>
+	// not sure if this works without glext.h?
+#elif defined(_IRR_COMPILE_WITH_SDL_DEVICE_) && !defined(_IRR_COMPILE_WITH_X11_DEVICE_)
 	#include <SDL_video.h>
 	#include <SDL_opengl.h>
+#else
+	#include <GL/gl.h>
+	#include <GL/glext.h>
+#endif
 
 namespace irr
 {