#    Musical Spectrum plugin for the DeaDBeeF audio player
#
#    Copyright (C) 2015 Christian Boxdörfer <christian.boxdoerfer@posteo.de>
#
#    Based on DeaDBeeFs stock spectrum.
#    Copyright (c) 2009-2015 Alexey Yakovenko <waker@users.sourceforge.net>
#    Copyright (c) 2011 William Pitcock <nenolod@dereferenced.org>
#
#    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 2
#    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, write to the Free Software
#    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

OUT_GTK2?=ddb_vis_musical_spectrum_GTK2.so
OUT_GTK3?=ddb_vis_musical_spectrum_GTK3.so

GTK2_CFLAGS?=`pkg-config --cflags gtk+-2.0`
GTK3_CFLAGS?=`pkg-config --cflags gtk+-3.0`

GTK2_LIBS?=`pkg-config --libs gtk+-2.0`
GTK3_LIBS?=`pkg-config --libs gtk+-3.0`

FFTW_LIBS?=-lfftw3

CC?=gcc
CFLAGS+=-Wall -fPIC -std=c99 -D_GNU_SOURCE
LDFLAGS+=-shared

GTK2_DIR?=gtk2
GTK3_DIR?=gtk3

SOURCES?=$(wildcard *.c)
OBJ_GTK2?=$(patsubst %.c, $(GTK2_DIR)/%.o, $(SOURCES))
OBJ_GTK3?=$(patsubst %.c, $(GTK3_DIR)/%.o, $(SOURCES))

define compile
	$(CC) $(CFLAGS) $1 $2 $< -c -o $@
endef

define link
	$(CC) $(LDFLAGS) $1 $2 $3 -o $@
endef

# Builds both GTK+2 and GTK+3 versions of the plugin.
all: gtk2 gtk3

# Builds GTK+2 version of the plugin.
gtk2: mkdir_gtk2 $(SOURCES) $(GTK2_DIR)/$(OUT_GTK2)

# Builds GTK+3 version of the plugin.
gtk3: mkdir_gtk3 $(SOURCES) $(GTK3_DIR)/$(OUT_GTK3)

mkdir_gtk2:
	@echo "Creating build directory for GTK+2 version"
	@mkdir -p $(GTK2_DIR)

mkdir_gtk3:
	@echo "Creating build directory for GTK+3 version"
	@mkdir -p $(GTK3_DIR)

$(GTK2_DIR)/$(OUT_GTK2): $(OBJ_GTK2)
	@echo "Linking GTK+2 version"
	$(call link, $(OBJ_GTK2), $(GTK2_LIBS), $(FFTW_LIBS))
	@echo "Done!"

$(GTK3_DIR)/$(OUT_GTK3): $(OBJ_GTK3)
	@echo "Linking GTK+3 version"
	$(call link, $(OBJ_GTK3), $(GTK3_LIBS), $(FFTW_LIBS))
	@echo "Done!"

$(GTK2_DIR)/%.o: %.c
	@echo "Compiling $(subst $(GTK2_DIR)/,,$@)"
	$(call compile, $(GTK2_CFLAGS))

$(GTK3_DIR)/%.o: %.c
	@echo "Compiling $(subst $(GTK3_DIR)/,,$@)"
	$(call compile, $(GTK3_CFLAGS))

clean:
	@echo "Cleaning files from previous build..."
	@rm -r -f $(GTK2_DIR) $(GTK3_DIR)