# DOS (DJGPP) build rules.

include $(dir $(lastword $(MAKEFILE_LIST)))/common.mk

PLATFORM := dos
BUILD    := $(REPO_DIR)/build/$(PLATFORM)
LIBDIR   := $(BUILD)/lib
BINDIR   := $(BUILD)/bin

CFLAGS  := $(COMMON_CFLAGS) -DJOEYLIB_PLATFORM_DOS -march=i386 -m32 -I$(REPO_DIR)/toolchains/audio/libxmp-lite/include
ASFLAGS := -f coff
LDFLAGS :=

# libxmp-lite (MIT, libxmp.org) -- 4-channel-Protracker-and-friends
# replayer + SMIX SFX overlay. Staged at toolchains/audio/libxmp-lite/
# (currently checked in; install.sh wiring is a follow-up). Built as
# a static archive that the DOS audio HAL links against.
LIBXMP_DIR     := $(REPO_DIR)/toolchains/audio/libxmp-lite
LIBXMP_SRC     := $(filter-out %/win32.c, $(wildcard $(LIBXMP_DIR)/src/*.c) $(wildcard $(LIBXMP_DIR)/src/loaders/*.c))
LIBXMP_OBJDIR  := $(BUILD)/obj/libxmp-lite
LIBXMP_OBJS    := $(patsubst $(LIBXMP_DIR)/src/%.c,$(LIBXMP_OBJDIR)/%.o,$(LIBXMP_SRC))
LIBXMP_AR      := $(LIBDIR)/libxmplite.a
LIBXMP_CFLAGS  := -DJOEY_LIBXMP_LITE -DLIBXMP_CORE_PLAYER -DHAVE_FNMATCH=0 -I$(LIBXMP_DIR)/include -I$(LIBXMP_DIR)/include/libxmp-lite -I$(LIBXMP_DIR)/src -Wno-unused-parameter

PORT_C_SRCS := $(wildcard $(SRC_PORT)/dos/*.c)
PORT_S_SRCS := $(wildcard $(SRC_PORT)/dos/*.asm)
CODEGEN_DIR := $(REPO_DIR)/src/codegen

LIB_OBJS := \
    $(patsubst $(SRC_CORE)/%.c,$(BUILD)/obj/core/%.o,$(CORE_C_SRCS)) \
    $(patsubst $(SRC_PORT)/dos/%.c,$(BUILD)/obj/port/%.o,$(PORT_C_SRCS)) \
    $(patsubst $(SRC_PORT)/dos/%.asm,$(BUILD)/obj/port/%.o,$(PORT_S_SRCS)) \
    $(BUILD)/obj/codegen/spriteEmitX86.o \
    $(BUILD)/obj/codegen/spriteCompile.o

LIB := $(LIBDIR)/libjoey.a

HELLO_SRC   := $(EXAMPLES)/hello/hello.c
HELLO_BIN   := $(BINDIR)/HELLO.EXE
PATTERN_SRC := $(EXAMPLES)/pattern/pattern.c
PATTERN_BIN := $(BINDIR)/PATTERN.EXE
DRAW_SRC    := $(EXAMPLES)/draw/draw.c
DRAW_BIN    := $(BINDIR)/DRAW.EXE
KEYS_SRC    := $(EXAMPLES)/keys/keys.c
KEYS_BIN    := $(BINDIR)/KEYS.EXE
JOY_SRC     := $(EXAMPLES)/joy/joy.c
JOY_BIN     := $(BINDIR)/JOY.EXE
SPRITE_SRC  := $(EXAMPLES)/sprite/sprite.c
SPRITE_BIN  := $(BINDIR)/SPRITE.EXE
AUDIO_SRC   := $(EXAMPLES)/audio/audio.c
AUDIO_BIN   := $(BINDIR)/AUDIO.EXE
UBER_SRC    := $(EXAMPLES)/uber/uber.c
UBER_BIN    := $(BINDIR)/UBER.EXE

# Game data lives under bin/DATA/, alongside the binaries DOSBox picks
# up when bin/ is mounted as C:. audio.c fopens "DATA/test.mod" etc.
DATA_DIR    := $(BINDIR)/DATA
DATA_FILES  := $(DATA_DIR)/test.mod $(DATA_DIR)/test.sfx

.PHONY: all dos clean-dos
all dos: $(LIB) $(LIBXMP_AR) $(HELLO_BIN) $(PATTERN_BIN) $(DRAW_BIN) $(KEYS_BIN) $(JOY_BIN) $(SPRITE_BIN) $(AUDIO_BIN) $(UBER_BIN) $(DATA_FILES)

$(BUILD)/obj/core/%.o: $(SRC_CORE)/%.c
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) -c $< -o $@

$(BUILD)/obj/port/%.o: $(SRC_PORT)/dos/%.c
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) -c $< -o $@

$(BUILD)/obj/port/%.o: $(SRC_PORT)/dos/%.asm
	@mkdir -p $(dir $@)
	$(DOS_AS) $(ASFLAGS) $< -o $@

$(BUILD)/obj/codegen/%.o: $(CODEGEN_DIR)/%.c
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) -I$(CODEGEN_DIR) -c $< -o $@

$(LIB): $(LIB_OBJS)
	@mkdir -p $(dir $@)
	$(DOS_AR) rcs $@ $^

$(LIBXMP_OBJDIR)/%.o: $(LIBXMP_DIR)/src/%.c
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $(LIBXMP_CFLAGS) -c $< -o $@

$(LIBXMP_AR): $(LIBXMP_OBJS)
	@mkdir -p $(dir $@)
	$(DOS_AR) rcs $@ $^

$(HELLO_BIN): $(HELLO_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(PATTERN_BIN): $(PATTERN_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(DRAW_BIN): $(DRAW_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(KEYS_BIN): $(KEYS_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(JOY_BIN): $(JOY_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(SPRITE_BIN): $(SPRITE_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(AUDIO_BIN): $(AUDIO_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(UBER_BIN): $(UBER_SRC) $(LIB)
	@mkdir -p $(dir $@)
	$(DOS_CC) $(CFLAGS) $< $(LIB) $(LIBXMP_AR) -o $@
	$(DOS_EMBED_DPMI) $@

$(DATA_DIR)/test.mod: $(REPO_DIR)/assets/test.mod
	@mkdir -p $(DATA_DIR)
	cp $< $@

$(DATA_DIR)/test.sfx: $(REPO_DIR)/assets/test.sfx
	@mkdir -p $(DATA_DIR)
	cp $< $@

clean-dos:
	rm -rf $(BUILD)