#!/usr/bin/make -f
# This file is part of wl-overlay: show overlays with images and text in Wayland
# Copyright © 2022 Midgard
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


SHELL = /bin/sh

# Choose a dedicated build directory as ‘make clean’ will remove it entirely
BUILD = build
$(shell mkdir -p $(BUILD))

# Convenience targets
.PHONY: all
all: $(BUILD)/wl-overlay

.PHONY: clean
clean:
	rm -rf $(BUILD) wlr-layer-shell-protocol.h

# Installation
DESTDIR ?=
PREFIX ?= /usr/local
BINDIR ?= $(DESTDIR)$(PREFIX)/bin


.PHONY: install
install: $(BUILD)/wl-overlay
	install -D -t "$(BINDIR)" "$^"

# Dependencies
CFLAGS += -Wall

CFLAGS += $(shell pkg-config --cflags pangocairo)
LDLIBS += $(shell pkg-config --libs pangocairo)

CFLAGS += $(shell pkg-config --cflags cairo)
LDLIBS += $(shell pkg-config --libs cairo)

CFLAGS += $(shell pkg-config --cflags wayland-client)
LDLIBS += $(shell pkg-config --libs wayland-client)

LDLIBS += -lrt

# Generated C files
wlr-layer-shell-protocol.h: wlr-layer-shell-unstable-v1.xml
	wayland-scanner client-header < "$^" > "$@"
$(BUILD)/wlr-layer-shell-protocol.c: wlr-layer-shell-unstable-v1.xml
	wayland-scanner private-code < "$^" > "$@"

$(BUILD)/xdg-shell-protocol.c: /usr/share/wayland-protocols/stable/xdg-shell/xdg-shell.xml
	wayland-scanner private-code < "$^" > "$@"


# Objects
SRCS = $(wildcard *.c)
GEN_SRCS = $(BUILD)/wlr-layer-shell-protocol.c $(BUILD)/xdg-shell-protocol.c
OBJS = $(SRCS:%.c=$(BUILD)/%.o) $(GEN_SRCS:%.c=%.o)

$(BUILD)/%.o: %.c
	$(CC) $(CFLAGS) -c $< $(OUTPUT_OPTION)
$(BUILD)/wayland.o: wayland.c wlr-layer-shell-protocol.h

$(BUILD)/wl-overlay: $(OBJS)