Browser support

.gitignore

@@ -25,6 +25,25 @@ scons-local*
 .sconsign.dblite
 /*.d
 
+# emscripten build generated files
+title.png
+dataversion.js
+Ubuntu-Regular.ttf
+output
+endless-sky.data
+endless-sky.js
+endless-sky.worker.js
+endless-sky.wasm
+endless-sky.wasm.map
+
+# other html build artifacts
+title.png
+dataversion.js
+
+# libjpeg-turbo
+2.1.0.tar.gz
+libjpeg-turbo-2.1.0
+
 # Test Reports
 test-report.xml
 

Makefile

@@ -0,0 +1,102 @@
+EMSCRIPTEN_ENV := $(shell command -v emmake 2> /dev/null)
+
+clean:
+	rm -f endless-sky.js
+	rm -f endless-sky.worker.js
+	rm -f endless-sky.data
+	rm -f endless-sky.wasm
+	rm -f dataversion.js
+	rm -f endless-sky.wasm.map
+	rm -f lib/emcc/libendless-sky.a
+clean-full: clean
+	rm -f Ubuntu-Regular.ttf
+	rm -f title.png
+	rm -rf build/emcc
+	rm -rf lib/emcc
+2.1.0.tar.gz:
+	wget https://github.com/libjpeg-turbo/libjpeg-turbo/archive/refs/tags/2.1.0.tar.gz
+libjpeg-turbo-2.1.0: 2.1.0.tar.gz
+	tar xzvf 2.1.0.tar.gz
+# | means libjpeg-turbo-2.1.0 is a "order-only prerequisite" so creating the file doesn't invalidate the dir
+libjpeg-turbo-2.1.0/libturbojpeg.a: | libjpeg-turbo-2.1.0
+ifndef EMSCRIPTEN_ENV
+	$(error "emmake is not available, activate the emscripten env first")
+endif
+	cd libjpeg-turbo-2.1.0; emcmake cmake -G"Unix Makefiles" -DWITH_SIMD=0 -DCMAKE_BUILD_TYPE=Release -Wno-dev
+	cd libjpeg-turbo-2.1.0; emmake make
+dev: endless-sky.js dataversion.js Ubuntu-Regular.ttf title.png
+	emrun --serve_after_close --serve_after_exit --browser chrome --private_browsing endless-sky.html
+title.png:
+	cp images/_menu/title.png title.png
+Ubuntu-Regular.ttf:
+	curl -Ls 'https://github.com/google/fonts/blob/main/ufl/ubuntu/Ubuntu-Regular.ttf?raw=true' > Ubuntu-Regular.ttf
+
+# not using -flto because of a change introduced in emscripten in 2.0.27 that I don't understand
+COMMON_FLAGS = -O3\
+		-s USE_SDL=2\
+		-s USE_LIBPNG=1\
+		-pthread\
+		-s DISABLE_EXCEPTION_CATCHING=0
+
+CFLAGS = $(COMMON_FLAGS)\
+	-Duuid_generate_random=uuid_generate\
+	-std=c++11\
+	-Wall\
+	-Werror\
+	-Wold-style-cast\
+	-DES_GLES\
+	-gsource-map\
+	-I libjpeg-turbo-2.1.0\
+
+#	-fno-rtti\ # some dynamic_casts in the code make this no longer possible
+
+# Note that that libmad is not linked! It's mocked out until it works with Emscripten
+LINK_FLAGS = $(COMMON_FLAGS)\
+	-L libjpeg-turbo-2.1.0\
+	-l jpeg\
+	-lidbfs.js\
+	--source-map-base http://localhost:6931/\
+	-s USE_WEBGL2=1\
+	-s ASSERTIONS=2\
+	-s DEMANGLE_SUPPORT=1\
+	-s GL_ASSERTIONS=1\
+	-s ASYNCIFY\
+	-s PTHREAD_POOL_SIZE=7\
+	-s MIN_WEBGL_VERSION=2\
+	-s MAX_WEBGL_VERSION=2\
+	-s WASM_MEM_MAX=2147483648\
+	-s INITIAL_MEMORY=629145600\
+	-s ALLOW_MEMORY_GROWTH=1\
+	--preload-file data\
+	--preload-file images\
+	--preload-file sounds\
+	--preload-file credits.txt\
+	--preload-file keys.txt\
+	-s EXPORTED_RUNTIME_METHODS=['callMain']\
+	--emrun
+
+CPPS := $(shell ls source/*.cpp) $(shell ls source/text/*.cpp)
+CPPS_EXCEPT_MAIN := $(shell ls source/*.cpp | grep -v main.cpp) $(shell ls source/text/*.cpp)
+TEMP := $(subst source/,build/emcc/,$(CPPS))
+OBJS := $(subst .cpp,.o,$(TEMP))
+TEMP := $(subst source/,build/emcc/,$(CPPS_EXCEPT_MAIN))
+OBJS_EXCEPT_MAIN := $(subst .cpp,.o,$(TEMP))
+HEADERS := $(shell ls source/*.h*) $(shell ls source/text/*.h*)
+
+build/emcc/%.o: source/%.cpp
+	@mkdir -p build/emcc
+	@mkdir -p build/emcc/text
+	em++ $(CFLAGS) -c $< -o $@
+
+lib/emcc/libendless-sky.a: $(OBJS_EXCEPT_MAIN)
+	@mkdir -p lib/emcc
+	emar rcs lib/emcc/libendless-sky.a $(OBJS_EXCEPT_MAIN)
+
+endless-sky.js: libjpeg-turbo-2.1.0/libturbojpeg.a lib/emcc/libendless-sky.a build/emcc/main.o
+ifndef EMSCRIPTEN_ENV
+	$(error "em++ is not available, activate the emscripten env first")
+endif
+	em++ -o endless-sky.js $(LINK_FLAGS) build/emcc/main.o lib/emcc/libendless-sky.a
+
+dataversion.js: endless-sky.js
+	./hash-data.py endless-sky.data dataversion.js