Add SOVERSION to libobs-opengl

Because libobs-opengl is a public library, it's customary to have SONAME
embedded in the library file.  Also remove the prefix override and
remove the prefixing "lib" from the output name.  This also requires us
to pass the library file name to dlopen invocations.

CMakeLists.txt

@@ -72,7 +72,6 @@ endif()
 if(NOT INSTALLER_RUN)
 	add_subdirectory(deps)
 
-	add_subdirectory(libobs)
 
 	if(WIN32)
 		add_subdirectory(libobs-d3d11)
@@ -80,6 +79,7 @@ if(NOT INSTALLER_RUN)
 	endif()
 
 	add_subdirectory(libobs-opengl)
+	add_subdirectory(libobs)
 	add_subdirectory(obs)
 	add_subdirectory(plugins)
 	add_subdirectory(test)

cmake/Modules/ObsHelpers.cmake

@@ -516,3 +516,20 @@ function(install_obs_plugin_with_data target datadir)
 	install_obs_plugin(${target})
 	install_obs_data(${target} "${datadir}" "obs-plugins/${target}")
 endfunction()
+
+function(define_graphic_modules target)
+	foreach(dl_lib opengl d3d9 d3d11)
+		string(TOUPPER ${dl_lib} dl_lib_upper)
+		if(TARGET libobs-${dl_lib})
+			target_compile_definitions(${target}
+				PRIVATE
+				DL_${dl_lib_upper}="$<TARGET_FILE_NAME:libobs-${dl_lib}>"
+				)
+		else()
+			target_compile_definitions(${target}
+				PRIVATE
+				DL_${dl_lib_upper}=""
+				)
+		endif()
+	endforeach()
+endfunction()

libobs-opengl/CMakeLists.txt

 project(libobs-opengl)
 
-include_directories(SYSTEM "${CMAKE_SOURCE_DIR}/libobs")
 
 find_package(OpenGL REQUIRED)
 include_directories(${OPENGL_INCLUDE_DIR})
@@ -73,8 +72,10 @@ add_library(libobs-opengl MODULE
 	${libobs-opengl_HEADERS})
 set_target_properties(libobs-opengl
 	PROPERTIES
-		OUTPUT_NAME libobs-opengl
-		PREFIX "")
+		OUTPUT_NAME obs-opengl
+		VERSION 0.0
+		SOVERSION 0
+		)
 target_link_libraries(libobs-opengl
 	libobs
 	glad

obs/CMakeLists.txt

@@ -179,6 +179,8 @@ target_link_libraries(obs
 	Qt5::Network
 	${obs_PLATFORM_LIBRARIES})
 
+define_graphic_modules(obs)
+
 install_obs_core(obs)
 install_obs_data(obs data obs-studio)
 

obs/obs-app.cpp

@@ -246,7 +246,7 @@ const char *OBSApp::GetRenderModule() const
 			"Renderer");
 
 	return (astrcmpi(renderer, "Direct3D 11") == 0) ?
-		"libobs-d3d11" : "libobs-opengl";
+		DL_D3D11 : DL_OPENGL;
 }
 
 bool OBSApp::OBSInit()

obs/window-basic-main.cpp

@@ -1421,13 +1421,13 @@ int OBSBasic::ResetVideo()
 	ret = AttemptToResetVideo(&ovi);
 	if (IS_WIN32 && ret != OBS_VIDEO_SUCCESS) {
 		/* Try OpenGL if DirectX fails on windows */
-		if (astrcmpi(ovi.graphics_module, "libobs-opengl") != 0) {
+		if (astrcmpi(ovi.graphics_module, DL_OPENGL) != 0) {
 			blog(LOG_WARNING, "Failed to initialize obs video (%d) "
 					  "with graphics_module='%s', retrying "
 					  "with graphics_module='%s'",
 					  ret, ovi.graphics_module,
-					  "libobs-opengl");
-			ovi.graphics_module = "libobs-opengl";
+					  DL_OPENGL);
+			ovi.graphics_module = DL_OPENGL;
 			ret = AttemptToResetVideo(&ovi);
 		}
 	}

test/osx/CMakeLists.txt

@@ -15,3 +15,4 @@ add_executable(osx_test
 target_link_libraries(osx_test
 	libobs
 	${COCOA})
+define_graphic_modules(osx_test)

test/osx/test.mm

@@ -45,7 +45,7 @@ static void CreateOBS(NSView *view)
 	ovi.adapter         = 0;
 	ovi.fps_num         = 30000;
 	ovi.fps_den         = 1001;
-	ovi.graphics_module = "libobs-opengl";
+	ovi.graphics_module = DL_OPENGL;
 	ovi.output_format   = VIDEO_FORMAT_RGBA;
 	ovi.base_width      = cx;
 	ovi.base_height     = cy;

test/win/CMakeLists.txt

@@ -9,3 +9,4 @@ add_executable(win-test WIN32
 	${win-text_SOURCES})
 target_link_libraries(win-test
 	libobs)
+define_graphic_modules(win-test)

test/win/test.cpp

@@ -80,7 +80,7 @@ static void CreateOBS(HWND hwnd)
 	ovi.base_height     = rc.bottom;
 	ovi.fps_num         = 30000;
 	ovi.fps_den         = 1001;
-	ovi.graphics_module = "libobs-opengl";
+	ovi.graphics_module = DL_OPENGL;
 	ovi.window_width    = rc.right;
 	ovi.window_height   = rc.bottom;
 	ovi.output_format   = VIDEO_FORMAT_RGBA;