Check in some assets

assets/Makefile

@@ -0,0 +1,23 @@
+IMAGES_OUTPUT_DIR = images
+
+SVG_FILES := $(wildcard images/*.svg)
+PNG_FILES := $(SVG_FILES:%.svg=%.png) images/overlay-dim.png
+BGRA_FILES := $(PNG_FILES:%.png=%.bgra)
+
+vpath %.svg $(SVG_FILES)
+vpath %.png $(PNG_FILES)
+vpath %.bgra $(BGRA_FILES)
+
+%.png: %.svg
+	@inkscape -C -e $@ $<
+
+%.bgra: %.png
+	@convert $< -format BGRA $@
+
+all: $(BGRA_FILES) $(PNG_FILES)
+
+clean:
+	@rm $(PNG_FILES) $(BGRA_FILES)
+
+$(IMAGES_OUTPUT_DIR)/overlay-dim.png: $(IMAGES_OUTPUT_DIR)/overlay.png
+	@convert $< -channel a -evaluate multiply 0.25 +channel png32:$@