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PLATFORM = linux
PLATFORMS = linux

WORK_DIR = .
SRC_DIR = $(WORK_DIR)/src

CSH_FLAGS = \
	-O2 -g \
	-Wall -Wextra -Werror -pedantic \
	-MMD -MP \
	-I$(SRC_DIR)

ifeq ($(filter $(PLATFORM),$(PLATFORMS)),)
$(error "Unknown platform: $(PLATFORM)")
endif

CC = clang
CC_STD = -std=c11
CC_FLAGS = $(CC_STD) $(CSH_FLAGS)

CXX = clang++
CXX_STD = -std=c++17
CXX_FLAGS = -fno-rtti -fno-exceptions $(CXX_STD) $(CSH_FLAGS)

CARGO = cargo
RM = rm -rf
ECHO = echo
CMAKE = cmake

MI_DIR = $(WORK_DIR)/mimalloc
MI_BUILD = $(MI_DIR)/build
MI_INCLUDE = $(MI_BUILD)/include
MI_OBJECT = $(MI_BUILD)/mimalloc.o
MI_FLAGS = \
	-DMI_BUILD_STATIC=NO \
	-DMI_BUILD_SHARED=NO \
	-DMI_BUILD_OBJECT=YES \
	-DMI_BUILD_TESTS=NO \
	-DMI_USE_CXX=NO \
	-DMI_XMALLOC=YES \
	-DMI_OVERRIDE=YES

HASHMAP_DIR = $(WORK_DIR)/hashmap
HASHMAP_SOURCE = $(HASHMAP_DIR)/hashmap.c

GLAD_DIR = $(WORK_DIR)/glad
GLAD_SOURCE = $(GLAD_DIR)/glad.c

FREETYPE_DIR = $(WORK_DIR)/freetype
FREETYPE_BUILD = $(FREETYPE_DIR)/build
FREETYPE_INCLUDE = $(FREETYPE_DIR)/include
FREETYPE_ARCHIVE = $(FREETYPE_BUILD)/libfreetype.a
FREETYPE_FLAGS = \
	-DFT_DISABLE_ZLIB=ON \
	-DFT_DISABLE_BZIP2=ON \
	-DFT_DISABLE_PNG=ON \
	-DFT_DISABLE_BROTLI=ON \
	-DFT_DISABLE_HARFBUZZ=ON

CGLM_DIR = $(WORK_DIR)/cglm
CGLM_INCLUDE = $(CGLM_DIR)/include

SOKOL_DIR = $(WORK_DIR)/sokol
SOKOL_BIN = $(WORK_DIR)/sokol_bin/bin
SOKOL_SHDC = $(SOKOL_BIN)/$(PLATFORM)/sokol-shdc

ASSETS_DIR = $(WORK_DIR)/assets
SHADER_LANG=glsl430
SHADER_OUTPUT=sokol_impl
SHADERS = \
	$(ASSETS_DIR)/text_shader.glsl

SHADER_HEADERS = $(SHADERS:.glsl=.h)

CSH_FLAGS += \
	-I$(MI_INCLUDE) \
	-I$(HASHMAP_DIR) \
	-I$(GLAD_DIR) \
	-I$(CGLM_INCLUDE) \
	-I$(FREETYPE_INCLUDE) \
	-I$(SOKOL_DIR) \
	-I$(ASSETS_DIR)

CMAKE_GENERATOR = "Unix Makefiles"

WAYCLOCK = $(WORK_DIR)/wayclock
SOURCES = \
	$(SRC_DIR)/wayclock.cc \
	$(SRC_DIR)/xdg-shell.c \
	$(SRC_DIR)/wlstate.c \
	$(SRC_DIR)/vec.c \
	$(SRC_DIR)/events.c \
	$(SRC_DIR)/window.c \
	$(SRC_DIR)/graphics.cc \
	$(SRC_DIR)/gfx.c \
	$(GLAD_DIR)/glad.c \
	$(ASSETS_DIR)/text_shader.c \
	$(HASHMAP_SOURCE)

OBJECTS := $(SOURCES:.cc=.o)
OBJECTS := $(OBJECTS:.c=.o)
OBJECTS += $(MI_OBJECT)

DEPS = $(OBJECTS:.o=.d)

LIBRARIES = -lwayland-client -lEGL -lwayland-egl $(FREETYPE_ARCHIVE) -lGL

all: $(WAYCLOCK)

$(OBJECTS): $(SHADER_HEADERS)

$(FREETYPE_BUILD):
	@echo " CMAKE $@"
	@$(CMAKE) $(FREETYPE_DIR) -B $@ -G $(CMAKE_GENERATOR) $(FREETYPE_FLAGS)

$(FREETYPE_ARCHIVE): | $(FREETYPE_BUILD)
	@echo " MAKE $@"
	@$(MAKE) -C $(FREETYPE_BUILD)

$(MI_BUILD):
	@echo " CMAKE $@"
	@$(CMAKE) $(MI_DIR) -B $@ -G $(CMAKE_GENERATOR) $(MI_FLAGS)

$(MI_OBJECT): | $(MI_BUILD)
	@echo " MAKE $@"
	@$(MAKE) -C $(MI_BUILD)

$(WAYCLOCK): $(OBJECTS) $(LIBRARIES)
	@echo " LD $@"
	@$(CXX) $(CXX_FLAGS) -o $@ $^ $(LIBRARIES)

%.o: %.cc
	@echo " CXX $<"
	@$(CXX) $(CXX_FLAGS) -c -o $@ $<

%.o: %.c
	@echo " CC $<"
	@$(CC) $(CC_FLAGS) -c -o $@ $<

%.h: %.glsl
	@echo " SHDC $<"
	@$(SOKOL_SHDC) --slang=$(SHADER_LANG) --format=$(SHADER_OUTPUT) --input=$< --output=$@

.PHONY: clean
clean:
	@$(RM) $(MI_BUILD)
	@$(RM) $(FREETYPE_BUILD)
	@$(RM) $(WAYCLOCK)
	@$(RM) $(OBJECTS) $(DEPS)
	@$(RM) $(SHADER_HEADERS)

-include $(DEPS)