Wasm port

Makefile

@@ -8,11 +8,11 @@ GAME_TARGETS = kula kula3D kulatwo
 all: $(GAME_TARGETS)
 
 $(GAME_TARGETS): %: %/assets
-	$(MAKE) $(if $(WINDOWS),-C $@ -f Makefile.win,-C $@) $(filter-out $@,$(MAKECMDGOALS))
+	$(MAKE) -C $@ -f Makefile.wasm $(filter-out $@,$(MAKECMDGOALS))
 
 %/assets:
 	python tools/copy_assets_to_game.py $*
 
 # empty rule to avoid "No rule to make target" errors
 %:
-	@:
+	@:

README.md

@@ -11,6 +11,7 @@ OpenKula has been ported to and tested on various platforms, with varying levels
 - [PlayStation Portable](https://github.com/bemxio/OpenKula/tree/psp) (text rendering issues)
 - [PlayStation Vita](https://github.com/bemxio/OpenKula/tree/vita)
 - [Xbox](https://github.com/bemxio/OpenKula/tree/xbox) (major performance issues)
+- [WASM](https://github.com/bemxio/OpenKula/tree/wasm)
 
 <!--
 My goal is to port OpenKula to all consoles and I (or my friends) own, and so here's a list of potential future platforms:
@@ -38,7 +39,7 @@ Before building, ensure you have the following dependencies installed:
 - [Python](https://www.python.org/) 3.6+ with [CairoSVG](https://cairosvg.org/)
 - [GNU Make](https://www.gnu.org/software/make/)
 - [Git](https://git-scm.com/)
-- (Optional) [MinGW-w64](https://www.mingw-w64.org/) for cross-compiling to Windows
+- [Emscripten SDK](https://emscripten.org/docs/getting_started/downloads.html) for WebAssembly builds
 
 On Debian-based distributions, you can install everything you need with `apt install build-essential git libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev python3 python3-cairosvg`.
 On Arch-based distros, use `pacman -S base-devel git sdl2 sdl2_image sdl2_mixer sdl2_ttf python python-cairosvg`.
@@ -68,9 +69,9 @@ make WINDOWS=1 <kula|kula3D|kulatwo> # Replace <kula|kula3D|kulatwo> with your d
 
 This will produce an executable file together with the assets inside the `build/<kula|kula3D|kulatwo>` directory. You can also run `make <kula|kula3D|kulatwo> run` to immediately launch the game after building, or `make` to build all three targets at once.
 
-In case of cross-compiling for Windows, you can also bundle the required DLLs and package everything into a ZIP file with `make WINDOWS=1 <kula|kula3D|kulatwo> dist`.
+Browser audio is started on the first user interaction to comply with autoplay restrictions.
 
 ## License
 This project is licensed under the MIT License - see the [`LICENSE`](LICENSE) file for details.
 
-Contributions are welcome! If you want to contribute in any way, whether it's an issue you've encountered or a pull request with new features, feel free to do so.
+Contributions are welcome! If you want to contribute in any way, whether it's an issue you've encountered or a pull request with new features, feel free to do so.

kula/Makefile.wasm

@@ -0,0 +1,51 @@
+# constants
+CC = emcc
+CFLAGS = -Wall -fms-extensions -O2 \
+	-sUSE_SDL=2 \
+	-sUSE_SDL_IMAGE=2 \
+	-sSDL2_IMAGE_FORMATS=png \
+	-sUSE_SDL_MIXER=2 \
+	-sSDL2_MIXER_FORMATS=mp3,ogg \
+	-sUSE_SDL_TTF=2 \
+	-sUSE_FREETYPE=1
+LDFLAGS = $(CFLAGS) \
+	-sALLOW_MEMORY_GROWTH=1 \
+	--use-preload-plugins \
+	--preload-file $(ASSETS_DIR)@/assets \
+	--shell-file ../web/shell.html
+
+SRC_DIR = src
+ASSETS_DIR = assets
+BUILD_DIR = ../build/kula
+export EM_CACHE ?= $(abspath ../build/.emcache)
+
+SOURCES = $(wildcard $(SRC_DIR)/*.c)
+HEADERS = $(wildcard $(SRC_DIR)/*.h)
+OBJECTS = $(patsubst $(SRC_DIR)/%.c,$(BUILD_DIR)/%.wasm.o,$(SOURCES))
+
+EXECUTABLE = index.html
+
+# phony
+.PHONY: all clean distclean run
+
+# targets
+all: $(BUILD_DIR)/$(EXECUTABLE)
+
+clean:
+	$(RM) -r $(BUILD_DIR)
+
+distclean: clean
+	$(RM) -r $(ASSETS_DIR)
+
+run: $(BUILD_DIR)/$(EXECUTABLE)
+	emrun $<
+
+# rules
+$(BUILD_DIR)/$(EXECUTABLE): $(OBJECTS) | $(BUILD_DIR)
+	$(CC) $(OBJECTS) $(LDFLAGS) -o $@
+
+$(BUILD_DIR)/%.wasm.o: $(SRC_DIR)/%.c | $(HEADERS) $(BUILD_DIR)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(BUILD_DIR):
+	mkdir -p $@

kula/src/constants.h

@@ -21,13 +21,6 @@
     #define ENEMY_OPEN_PATH "/dev_hdd0/game/KULA00001/USRDIR/assets/fiende01.png"
     #define FONT_PATH "/dev_hdd0/game/KULA00001/USRDIR/assets/skrifttype.ttf"
     #define PLAYER_PATH "/dev_hdd0/game/KULA00001/USRDIR/assets/kula.png"
-#elif defined(__3DS__)
-    #define BACKGROUND_PATH "romfs:/kulabakgrunn.png"
-    #define BGM_PATH "romfs:/mortietunes.mp3"
-    #define ENEMY_CLOSED_PATH "romfs:/fiende02.png"
-    #define ENEMY_OPEN_PATH "romfs:/fiende01.png"
-    #define FONT_PATH "romfs:/skrifttype.ttf"
-    #define PLAYER_PATH "romfs:/kula.png"
 #else
     #define BACKGROUND_PATH "assets/kulabakgrunn.png"
     #define BGM_PATH "assets/mortietunes.mp3"