Adding support for emscripten

CMakeLists.txt

@@ -33,6 +33,8 @@ if(NOT DEFINED LLGL_TARGET_PLATFORM)
     elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "WindowsStore")
         set(LLGL_TARGET_PLATFORM "${CMAKE_SYSTEM_NAME} ${CMAKE_SYSTEM_VERSION}")
         set(LLGL_UWP_PLATFORM ON)
+    elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Emscripten")
+        set(LLGL_TARGET_PLATFORM "Emscripten")
     elseif(WIN32)
         if(LLGL_BUILD_64BIT)
             set(LLGL_TARGET_PLATFORM "Win64")
@@ -408,7 +410,7 @@ option(LLGL_BUILD_EXAMPLES "Include example projects" OFF)
 option(LLGL_BUILD_RENDERER_NULL "Include Null renderer project" ON)
 
 if(NOT LLGL_UWP_PLATFORM)
-    if(LLGL_MOBILE_PLATFORM)
+    if(LLGL_MOBILE_PLATFORM OR EMSCRIPTEN)
         option(LLGL_BUILD_RENDERER_OPENGLES3 "Include OpenGLES 3 renderer project" ON)
     else()
         option(LLGL_BUILD_RENDERER_OPENGL "Include OpenGL renderer project" ON)
@@ -483,6 +485,11 @@ else()
     set(SUMMARY_TARGET_ARCH "x86")
 endif()
 
+if(EMSCRIPTEN)   
+    add_compile_options("SHELL:-s USE_PTHREADS")
+    add_link_options("SHELL:-s USE_PTHREADS")    
+endif()
+
 
 # === Global files ===
 
@@ -522,7 +529,10 @@ if(LLGL_ENABLE_DEBUG_LAYER)
     find_source_files(FilesRendererDbgTexture       CXX     "${PROJECT_SOURCE_DIR}/sources/Renderer/DebugLayer/Texture")
 endif()
 
-if(WIN32)
+if(EMSCRIPTEN)
+    find_source_files(FilesPlatform                 CXX     "${PROJECT_SOURCE_DIR}/sources/Platform/Emscripten")
+    find_source_files(FilesIncludePlatform          CXX     "${PROJECT_INCLUDE_DIR}/LLGL/Platform/Emscripten")
+elseif(WIN32)
     if(LLGL_UWP_PLATFORM)
         find_source_files(FilesPlatform             CXX     "${PROJECT_SOURCE_DIR}/sources/Platform/UWP")
         find_source_files(FilesIncludePlatform      CXX     "${PROJECT_INCLUDE_DIR}/LLGL/Platform/UWP")
@@ -679,6 +689,8 @@ elseif(APPLE)
     if(LLGL_MACOS_ENABLE_COREVIDEO)
         target_link_libraries(LLGL "-framework CoreVideo")
     endif()
+elseif(EMSCRIPTEN)
+    ### 
 elseif(UNIX)
     target_link_libraries(LLGL X11 pthread Xrandr)
 #elseif(LLGL_UWP_PLATFORM)

cmake/FindOpenGLES3.cmake

@@ -206,6 +206,15 @@ ELSE (WIN32)
         findpkg_framework(OpenGLES)
     set(OPENGLES_gl_LIBRARY "-framework OpenGLES")
 
+  ELSEIF(EMSCRIPTEN)
+
+    find_package(OpenGL REQUIRED)
+    #message(STATUS "OPENGL_INCLUDE_DIR: " ${OPENGL_INCLUDE_DIR})
+    #message(STATUS "OPENGL_LIBRARIES: " ${OPENGL_LIBRARIES})
+
+    SET(OPENGLES_INCLUDE_DIR ${OPENGL_INCLUDE_DIR})
+    SET(OPENGLES_gl_LIBRARY ${OPENGL_LIBRARIES})
+
   ELSE(APPLE)
 
     FIND_PATH(OPENGLES_INCLUDE_DIR GLES3/gl3.h

include/LLGL/Backend/OpenGL/Emscripten/EmscriptenNativeHandle.h

@@ -0,0 +1,39 @@
+/*
+ * EmscriptenNativeHandle.h (OpenGL)
+ *
+ * Copyright (c) 2015 Lukas Hermanns. All rights reserved.
+ * Licensed under the terms of the BSD 3-Clause license (see LICENSE.txt).
+ */
+
+#ifndef LLGL_OPENGL_EMSCRIPTEN_NATIVE_HANDLE_H
+#define LLGL_OPENGL_EMSCRIPTEN_NATIVE_HANDLE_H
+
+
+namespace LLGL
+{
+
+namespace OpenGL
+{
+
+
+/**
+\brief Emscripten native handle structure for the OpenGL render system.
+\see RenderSystem::GetNativeHandle
+\see RenderSystemDescriptor::nativeHandle
+*/
+struct RenderSystemNativeHandle
+{
+    int context;
+};
+
+
+} // /namespace OpenGL
+
+} // /namespace LLGL
+
+
+#endif
+
+
+
+// ================================================================================

include/LLGL/Backend/OpenGL/NativeHandle.h

@@ -21,6 +21,8 @@
 #   include <LLGL/Backend/OpenGL/IOS/IOSNativeHandle.h>
 #elif defined(LLGL_OS_ANDROID)
 #   include <LLGL/Backend/OpenGL/Android/AndroidNativeHandle.h>
+#elif defined(LLGL_OS_EMSCRIPTEN)
+#   include <LLGL/Backend/OpenGL/Emscripten/EmscriptenNativeHandle.h>
 #endif
 
 

include/LLGL/Platform/Emscripten/EmscriptenNativeHandle.h

@@ -0,0 +1,32 @@
+/*
+ * LinuxNativeHandle.h
+ * 
+ * Copyright (c) 2015 Lukas Hermanns. All rights reserved.
+ * Licensed under the terms of the BSD 3-Clause license (see LICENSE.txt).
+ */
+
+#ifndef LLGL_EMSCRIPTEN_NATIVE_HANDLE_H
+#define LLGL_EMSCRIPTEN_NATIVE_HANDLE_H
+
+#include <emscripten/val.h>
+
+namespace LLGL
+{
+
+
+//! Emscripten native handle structure.
+struct NativeHandle
+{
+    //! HTML canvas object.
+    emscripten::val      canvas;
+};
+
+
+} // /namespace LLGL
+
+
+#endif
+
+
+
+// ================================================================================

include/LLGL/Platform/NativeHandle.h

@@ -19,6 +19,8 @@
 #   include <LLGL/Platform/MacOS/MacOSNativeHandle.h>
 #elif defined(LLGL_OS_LINUX)
 #   include <LLGL/Platform/Linux/LinuxNativeHandle.h>
+#elif defined(LLGL_OS_EMSCRIPTEN)
+#   include <LLGL/Platform/Emscripten/EmscriptenNativeHandle.h>
 #elif defined(LLGL_OS_IOS)
 #   include <LLGL/Platform/IOS/IOSNativeHandle.h>
 #elif defined(LLGL_OS_ANDROID)

include/LLGL/Platform/Platform.h

@@ -30,6 +30,8 @@ see https://sourceforge.net/p/predef/wiki/OperatingSystems/
 #   endif
 #elif defined __ANDROID__ || defined ANDROID
 #   define LLGL_OS_ANDROID
+#elif defined EMSCRIPTEN
+#   define LLGL_OS_EMSCRIPTEN
 #elif defined __linux__
 #   define LLGL_OS_LINUX
 #endif

sources/Platform/Debug.h

@@ -22,6 +22,8 @@
 #      include "MacOS/MacOSDebug.h"
 #   elif defined(LLGL_OS_LINUX)
 #      include "Linux/LinuxDebug.h"
+#   elif defined(LLGL_OS_EMSCRIPTEN)
+#      include "Emscripten/EmscriptenDebug.h"
 #   elif defined(LLGL_OS_IOS)
 #      include "IOS/IOSDebug.h"
 #   elif defined(LLGL_OS_ANDROID)

sources/Platform/Emscripten/EmscriptenDebug.cpp

@@ -0,0 +1,26 @@
+/*
+ * LinuxDebug.cpp
+ *
+ * Copyright (c) 2015 Lukas Hermanns. All rights reserved.
+ * Licensed under the terms of the BSD 3-Clause license (see LICENSE.txt).
+ */
+
+#include "../Debug.h"
+#include <stdio.h>
+
+
+namespace LLGL
+{
+
+
+LLGL_EXPORT void DebugPuts(const char* text)
+{
+    ::fprintf(stderr, "%s\n", text);
+}
+
+
+} // /namespace LLGL
+
+
+
+// ================================================================================

sources/Platform/Emscripten/EmscriptenDebug.h

@@ -0,0 +1,25 @@
+/*
+ * LinuxDebug.h
+ *
+ * Copyright (c) 2015 Lukas Hermanns. All rights reserved.
+ * Licensed under the terms of the BSD 3-Clause license (see LICENSE.txt).
+ */
+
+#ifndef LLGL_EMSCRIPTEN_DEBUG_H
+#define LLGL_EMSCRIPTEN_DEBUG_H
+
+
+#include <signal.h>
+
+#ifdef SIGTRAP
+#   define LLGL_DEBUG_BREAK() raise(SIGTRAP)
+#else
+#   define LLGL_DEBUG_BREAK()
+#endif
+
+
+#endif
+
+
+
+// ================================================================================