# Makefile to create all versions of the Emoji One Color SVGinOT font
# Run with: make -j [NUMBER_OF_CPUS]

TMP := /tmp
# Use Linux Shared Memory to avoid wasted disk writes.
#TMP := /dev/shm

# Where to find scfbuild?
SCFBUILD := SCFBuild/bin/scfbuild

VERSION := 1.0-beta3
FONT_PREFIX := build/EmojiOneColor-SVGinOT
REGULAR_FONT := $(FONT_PREFIX).ttf
REGULAR_ZIP := $(FONT_PREFIX)-$(VERSION).zip
LINUX_ZIP := $(FONT_PREFIX)-Linux-$(VERSION).zip
OSX_FONT := $(FONT_PREFIX)-OSX.ttf
OSX_ZIP := $(FONT_PREFIX)-OSX-$(VERSION).zip

# There are two SVG source directories to keep the emojione assets separate.
SVG_EMOJIONE := assets/emojione-svg
SVG_MORE := assets/svg

# Create the lists of traced and color SVGs
SVG_FILES := $(wildcard $(SVG_EMOJIONE)/*.svg) $(wildcard $(SVG_MORE)/*.svg)
SVG_STAGE_FILES := $(patsubst $(SVG_EMOJIONE)/%.svg, build/stage/%.svg, $(SVG_FILES))
SVG_STAGE_FILES := $(patsubst $(SVG_MORE)/%.svg, build/stage/%.svg, $(SVG_STAGE_FILES))
SVG_TRACE_FILES := $(patsubst build/stage/%.svg, build/svg-trace/%.svg, $(SVG_STAGE_FILES))
SVG_COLOR_FILES := $(patsubst build/stage/%.svg, build/svg-color/%.svg, $(SVG_STAGE_FILES))

.PHONY: all package clean

all: $(REGULAR_FONT) $(OSX_FONT)

package: all
	rm -rf $(REGULAR_ZIP) $(LINUX_ZIP) $(OSX_ZIP) build/linux
	7z a -tzip -mx=9 $(REGULAR_ZIP) ./$(REGULAR_FONT)
	7z a -tzip -mx=9 $(OSX_ZIP) ./$(OSX_FONT)
	mkdir build/linux
	cp -R linux/* build/linux/
	cp $(REGULAR_FONT) build/linux/
	cp README.md build/linux/
	7z a -tzip -mx=9 $(LINUX_ZIP) ./build/linux/*

$(REGULAR_FONT): $(SVG_TRACE_FILES) $(SVG_COLOR_FILES)
	$(SCFBUILD) -c scfbuild.yml -o $(REGULAR_FONT) --font-version="$(VERSION)"

$(OSX_FONT): $(SVG_TRACE_FILES) $(SVG_COLOR_FILES)
	$(SCFBUILD) -c scfbuild-osx.yml -o $(OSX_FONT) --font-version="$(VERSION)"

# Create black SVG traces of the color SVGs to use as glyphs.
# 1. Make the EmojiOne SVG into a PNG with Inkscape
# 2. Make the PNG into a BMP with ImageMagick and add margin by increasing the
#    canvas size to allow the outer "stroke" to fit.
# 3. Make the BMP into a Edge Detected PGM with mkbitmap
# 4. Make the PGM into a black SVG trace with potrace
build/svg-trace/%.svg: build/staging/%.svg | build/svg-trace
	inkscape -w 1000 -h 1000 -z -e $(TMP)/$(*F).png $<
	convert $(TMP)/$(*F).png -gravity center -extent 1066x1066 $(TMP)/$(*F).bmp
	rm $(TMP)/$(*F).png
	mkbitmap -g -s 1 -f 10 -o $(TMP)/$(*F).pgm $(TMP)/$(*F).bmp
	rm $(TMP)/$(*F).bmp
	potrace --flat -s --height 2048pt --width 2048pt -o $@ $(TMP)/$(*F).pgm
	rm $(TMP)/$(*F).pgm

# Optimize/clean the color SVG files
build/svg-color/%.svg: build/staging/%.svg | build/svg-color
	svgo -i $< -o $@

# Copy the files from multiple directories into one source directory
build/staging/%.svg: $(SVG_EMOJIONE)/%.svg | build/staging
	cp $< $@

build/staging/%.svg: $(SVG_MORE)/%.svg | build/staging
	cp $< $@

# Create the build directories
build:
	mkdir build

build/staging: | build
	mkdir build/staging

build/svg-trace: | build
	mkdir build/svg-trace

build/svg-color: | build
	mkdir build/svg-color

clean:
	rm -rf build