emscripten support

.gitignore

@@ -12,7 +12,6 @@ GPATH
 GRTAGS
 GTAGS
 /run_release.bat
-/package.bat
 pkg
 pkg.zip
 eco2d.zip

CMakeLists.txt

@@ -13,6 +13,13 @@ if(MSVC)
     add_definitions(-D_CRT_SECURE_NO_WARNINGS)
 endif()
 
+if (EMSCRIPTEN)
+  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s USE_GLFW=3 -s ASSERTIONS=1 -s WASM=1 -s INITIAL_MEMORY=268435456 -s FORCE_FILESYSTEM=1 --preload-file ${CMAKE_SOURCE_DIR}/art@art/")
+  set(CMAKE_EXECUTABLE_SUFFIX ".html") # This line is used to set your executable to build with the emscripten html template so that you can directly open it.
+  set(CMAKE_COMPILE_WARNING_AS_ERROR OFF)
+  set(CMAKE_CXX_)
+endif ()
+
 include_directories(code/common code/vendors code/vendors/flecs)
 
 include(cmake/FindRaylib.cmake)

cmake/utils.cmake

@@ -3,6 +3,8 @@ function(link_system_libs target_name)
         target_link_libraries(${target_name} winmm)
     elseif (APPLE)
         target_link_libraries(${target_name} pthread m dl)
+    elseif (EMSCRIPTEN)
+        target_link_libraries(${target_name} pthread m dl)
     elseif (UNIX)
         target_link_libraries(${target_name} pthread m dl atomic)
     endif()

code/game/src/game.c

@@ -12,6 +12,7 @@
 #include "profiler.h"
 
 #include "flecs/flecs_os_api_stdcpp.h"
+#include "flecs/flecs.h"
 
 #include "modules/components.h"
 #include "modules/systems.h"
@@ -114,8 +115,10 @@ size_t game_world_view_count(void) {
 }
 
 void flecs_dash_init() {
+#if !defined(ZPL_SYSTEM_EMSCRIPTEN)
     ecs_singleton_set(world_ecs(), EcsRest, {0});
     ECS_IMPORT(world_ecs(), FlecsMonitor);
+#endif
 }
 
 float game_time() {

code/game/src/main.c

@@ -14,6 +14,11 @@
 #include "modules/components.h"
 #include "modules/systems.h"
 
+#if defined(PLATFORM_WEB)
+    #include <emscripten/emscripten.h>
+    void UpdateDrawFrame(void);
+#endif
+
 #define DEFAULT_WORLD_SEED 302097
 #define DEFAULT_CHUNK_SIZE 16 /* amount of blocks within a chunk (single axis) */
 #define DEFAULT_WORLD_SIZE 32 /* amount of chunks within a world (single axis) */
@@ -73,6 +78,7 @@ int main(int argc, char** argv) {
     sighandler_register();
     game_init(host, port, play_mode, num_viewers, seed, chunk_size, world_size, is_dash_enabled);
 
+#if !defined(PLATFORM_WEB)
     while (game_is_running()) {
         profile (PROF_MAIN_LOOP) {
             game_input();
@@ -82,6 +88,9 @@ int main(int argc, char** argv) {
 
         profiler_collate();
     }
+#else
+    emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
+#endif
 
     game_shutdown();
     sighandler_unregister();
@@ -90,3 +99,11 @@ int main(int argc, char** argv) {
     zpl_opts_free(&opts);
     return 0;
 }
+
+#if defined(EMSCRIPTEN)
+void UpdateDrawFrame(void) {
+    game_input();
+    game_update();
+    game_render();
+}
+#endif

code/vendors/flecs/CMakeLists.txt

@@ -7,3 +7,4 @@ file(GLOB SRCS *.h
 )
 
 add_library(flecs-bundle STATIC ${SRCS})
+target_compile_options(flecs-bundle PRIVATE "-Wno-enum-constexpr-conversion")

package.bat

@@ -0,0 +1,18 @@
+@echo off
+
+cmake --build build_rel --parallel 32 --config Release
+if not %ERRORLEVEL% == 0 exit /B 1
+@rd /S /Q pkg
+mkdir pkg
+copy build_rel\eco2d.exe pkg
+rem tools\upx -9 pkg\eco2d.exe
+robocopy art pkg\art /E
+@del pkg\art\*.ecotex
+
+IF NOT "%1"=="SKIP_DEPLOY" (
+	pushd pkg
+	..\tools\7za.exe a -r ..\eco2d.zip *.*
+	popd
+
+	butler push eco2d.zip zaklaus/eco2d:win64-latest
+)