A few fixes for the Emscripten WebAssembly build.

CMakeLists.txt

@@ -207,7 +207,7 @@ endif()
 if(EMSCRIPTEN)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s USE_SDL=2 -pthread")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s INITIAL_MEMORY=33554432 -s ALLOW_MEMORY_GROWTH=1 -s WASM=1 -s ASSERTIONS=1 -s EXIT_RUNTIME=1 -s USE_SDL=2 \
-                                -pthread -s PTHREAD_POOL_SIZE=4 -s DEMANGLE_SUPPORT=1 -s USE_WEBGL2=1 -s FULL_ES2=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s ASYNCIFY \
+                                -pthread -s PTHREAD_POOL_SIZE=4 -s DEMANGLE_SUPPORT=1 -s USE_WEBGL2=1 -s FULL_ES3=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s ASYNCIFY \
                                 --preload-file ${PROJECT_SOURCE_DIR}/resources@/home/web_user/.emulationstation/resources/ \
                                 --preload-file ${PROJECT_SOURCE_DIR}/themes/rbsimple-DE@/home/web_user/.emulationstation/themes/rbsimple-DE/ \
                                 --preload-file ${PROJECT_SOURCE_DIR}/ROMs@/home/web_user/ROMs/")

es-core/src/renderers/RendererOpenGL.cpp

@@ -116,7 +116,11 @@ GLenum RendererOpenGL::convertTextureType(const TextureType type)
 #else
         case TextureType::BGRA:  { return GL_BGRA;            } break;
 #endif
+#if defined(__EMSCRIPTEN__)
+        case TextureType::RED:   { return GL_LUMINANCE;       } break;
+#else
         case TextureType::RED:   { return GL_RED;             } break;
+#endif
         default:                 { return GL_ZERO;            }
     }
     // clang-format on

es-core/src/utils/PlatformUtil.cpp

@@ -18,13 +18,11 @@
 
 #include <SDL2/SDL_events.h>
 
-#if defined(__APPLE__)
-#include <array>
-#endif
-
 #if !defined(_WIN64)
 #include <unistd.h>
 #endif
+
+#include <array>
 #include <fcntl.h>
 
 namespace Utils