#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------

ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif

include $(DEVKITARM)/3ds_rules

export renderd7_MAJOR	:= 0
export renderd7_MINOR	:= 9
export renderd7_PATCH	:= 4

VERSION	:=	$(renderd7_MAJOR).$(renderd7_MINOR).$(renderd7_PATCH)

# If on a tagged commit, use the tag instead of the commit
ifneq ($(shell echo $(shell git tag -l --points-at HEAD) | head -c 1),)
GIT_VER := $(shell git tag -l --points-at HEAD)
else
GIT_VER := $(shell git rev-parse --short HEAD)
endif

TIME_TIME := $(shell date --iso=seconds)


#---------------------------------------------------------------------------------
# TARGET is the name of the output
# BUILD is the directory where object files & intermediate files will be placed
# SOURCES is a list of directories containing source code
# DATA is a list of directories containing data files
# INCLUDES is a list of directories containing header files
#---------------------------------------------------------------------------------
TARGET		:=	renderd7
SOURCES		:=	source external/source
DATA		:=	data
INCLUDES	:=	include

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH	:=	-march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft

CFLAGS	:=	-g -Wall -Werror -mword-relocations -save-temps\
			-DV_STRING=\"$(GIT_VER)\" \
			-DV_TIME=\"$(TIME_TIME)\" \
			-ffunction-sections -fdata-sections \
			$(ARCH) $(BUILD_CFLAGS)

CFLAGS	+=	$(INCLUDE) -D__3DS__ -D_GNU_SOURCE=1

CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++20

ASFLAGS	:=	-g $(ARCH) $(DEFINES)

#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS	:= $(PORTLIBS) $(CTRULIB)

#---------------------------------------------------------------------------------
# no real need to edit anything past this point unless you need to add additional
# rules for different file extensions
#---------------------------------------------------------------------------------
ifneq ($(BUILD),$(notdir $(CURDIR)))
#---------------------------------------------------------------------------------

export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
			$(foreach dir,$(DATA),$(CURDIR)/$(dir))

CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
PICAFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.v.pica)))
SHLISTFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.shlist)))
BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))

#---------------------------------------------------------------------------------
# use CXX for linking C++ projects, CC for standard C
#---------------------------------------------------------------------------------
ifeq ($(strip $(CPPFILES)),)
#---------------------------------------------------------------------------------
	export LD	:=	$(CC)
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
	export LD	:=	$(CXX)
#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------

export OFILES_SOURCES 	:=	$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)

export OFILES_BIN	:=	$(addsuffix .o,$(BINFILES)) \
			$(PICAFILES:.v.pica=.shbin.o) $(SHLISTFILES:.shlist=.shbin.o)

export OFILES	:=	$(OFILES_BIN) $(OFILES_SOURCES)

export HFILES	:=	$(PICAFILES:.v.pica=_shbin.h) $(addsuffix .h,$(subst .,_,$(BINFILES)))

export INCLUDE	:=	$(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
			$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
			-I.

.PHONY: clean all doc

#---------------------------------------------------------------------------------
all: lib/librenderd7.a lib/librenderd7d.a

doc:
	@doxygen Doxyfile

dist-bin: all
	@tar --exclude=*~ -cjf $(TARGET).tar.bz2 include lib

dist-src:
	@tar --exclude=*~ -cjf $(TARGET)-src.tar.bz2 include $(SOURCES) Makefile

dist: dist-src dist-bin

lib:
	@[ -d $@ ] || mkdir -p $@

release:
	@[ -d $@ ] || mkdir -p $@

debug:
	@[ -d $@ ] || mkdir -p $@


lib/librenderd7.a : lib release $(SOURCES) $(INCLUDES)
	@$(MAKE) BUILD=release OUTPUT=$(CURDIR)/$@ \
	BUILD_CFLAGS="-DNDEBUG=1 -O2 -fomit-frame-pointer" \
	DEPSDIR=$(CURDIR)/release \
	--no-print-directory -C release \
	-f $(CURDIR)/Makefile

lib/librenderd7d.a : lib debug $(SOURCES) $(INCLUDES)
	@$(MAKE) BUILD=debug OUTPUT=$(CURDIR)/$@ \
	BUILD_CFLAGS="-DDEBUG=1 -Og" \
	DEPSDIR=$(CURDIR)/debug \
	--no-print-directory -C debug \
	-f $(CURDIR)/Makefile

#---------------------------------------------------------------------------------
clean:
	@echo clean ...
	@rm -fr release debug lib includes

#---------------------------------------------------------------------------------
else

DEPENDS	:=	$(OFILES:.o=.d)

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
$(OUTPUT)	:	$(OFILES)

$(OFILES_SOURCES) : $(HFILES)

#---------------------------------------------------------------------------------
# you need a rule like this for each extension you use as binary data
#---------------------------------------------------------------------------------
%.bin.o	%_bin.h :	%.bin
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	@$(bin2o)

#---------------------------------------------------------------------------------
# rules for assembling GPU shaders
#---------------------------------------------------------------------------------
define shader-as
	$(eval CURBIN := $*.shbin)
	$(eval DEPSFILE := $(DEPSDIR)/$*.shbin.d)
	echo "$(CURBIN).o: $< $1" > $(DEPSFILE)
	echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"_end[];" > `(echo $(CURBIN) | tr . _)`.h
	echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"[];" >> `(echo $(CURBIN) | tr . _)`.h
	echo "extern const u32" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`_size";" >> `(echo $(CURBIN) | tr . _)`.h
	picasso -o $(CURBIN) $1
	bin2s $(CURBIN) | $(AS) -o $*.shbin.o
endef

%.shbin.o %_shbin.h : %.v.pica %.g.pica
	@echo $(notdir $^)
	@$(call shader-as,$^)

%.shbin.o %_shbin.h : %.v.pica
	@echo $(notdir $<)
	@$(call shader-as,$<)

%.shbin.o %_shbin.h : %.shlist
	@echo $(notdir $<)
	@$(call shader-as,$(foreach file,$(shell cat $<),$(dir $<)$(file)))

-include $(DEPENDS)

#---------------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------------