Import('env')

env_png = env.Clone()

# Thirdparty source files
if (env["libpng"] == "builtin"):
	thirdparty_dir = "#thirdparty/libpng/"
	thirdparty_sources = [
		"png.c",
		"pngerror.c",
		"pngget.c",
		"pngmem.c",
		"pngpread.c",
		"pngread.c",
		"pngrio.c",
		"pngrtran.c",
		"pngrutil.c",
		"pngset.c",
		"pngtrans.c",
		"pngwio.c",
		"pngwrite.c",
		"pngwtran.c",
		"pngwutil.c",
	]
	thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]

	env_png.add_source_files(env.drivers_sources, thirdparty_sources)
	env_png.Append(CPPPATH = [thirdparty_dir])

	# Currently .ASM filter_neon.S does not compile on NT.
	import os
	if ("neon_enabled" in env and env["neon_enabled"]) and os.name!="nt":
		env_png.Append(CPPFLAGS = ["-DPNG_ARM_NEON_OPT=2"])
		env_neon = env_png.Clone();
		if "S_compiler" in env:
			env_neon['CC'] = env['S_compiler']
		neon_sources = []
		neon_sources.append(env_neon.Object(thirdparty_dir + "/arm/arm_init.c"))
		neon_sources.append(env_neon.Object(thirdparty_dir + "/arm/filter_neon_intrinsics.c"))
		neon_sources.append(env_neon.Object(thirdparty_dir + "/arm/filter_neon.S"))
		env.drivers_sources += neon_sources
	else:
		env_png.Append(CPPFLAGS = ["-DPNG_ARM_NEON_OPT=0"])

# Godot source files
env_png.add_source_files(env.drivers_sources, "*.cpp")

Export('env')