From b10949511478ee291300bc6bb2667847dbc59d70 Mon Sep 17 00:00:00 2001
From: Patryk Obara <dreamer.tan@gmail.com>
Date: Mon, 3 Feb 2020 00:39:44 +0100
Subject: [PATCH] Add target for creating .ico file

---
 contrib/icons/.gitignore |  1 +
 contrib/icons/Makefile   | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/contrib/icons/.gitignore b/contrib/icons/.gitignore
index a0a78dec..6204d801 100644
--- a/contrib/icons/.gitignore
+++ b/contrib/icons/.gitignore
@@ -1 +1,2 @@
 dosbox-staging.iconset
+icon_*.png
diff --git a/contrib/icons/Makefile b/contrib/icons/Makefile
index 4081f7de..2d2dc150 100644
--- a/contrib/icons/Makefile
+++ b/contrib/icons/Makefile
@@ -4,11 +4,32 @@ help:
 	@echo "Re-generate icons in platform specific formats."
 	@echo
 	@echo "Available targets:"
+	@echo "  dosbox-staging.ico  - Windows format"
 	@echo "  dosbox-staging.icns - macOS format"
 	@echo "  clean               - clean intermediate files"
 
+##
+#  Create an icon using Windows .ico format.
+#
+#  Windows users are expected to create icons using GUI applications, and
+#  there's no good Windows-native command line program for this usecase.
+#
+#  This target is using convert (package imagemagick) to resize icons
+#  and icotool (package icoutils) to create an .ico file.
+#
+dosbox-staging.ico: \
+		icon_256x256.png \
+		icon_48x48.png \
+		icon_32x32.png \
+		dosbox-staging-16.png
+	icotool -c $^ -o $@
+
+icon_%.png: dosbox-staging-1024.png
+	convert -resize $(shell echo $@ | sed 's|icon_\(.*\).png|\1|') $< $@
+
 ##
 #  Create an icon using macOS .icns format.
+#
 #  Uses sips, which is available by default on macOS.
 #
 dosbox-staging.icns: dosbox-staging.iconset
@@ -29,3 +50,4 @@ dosbox-staging.iconset: dosbox-staging-1024.png dosbox-staging-16.png
 
 clean:
 	rm -rf dosbox-staging.iconset
+	rm -f icon_*.png