From cb9d162a265e9e7b86bec92051f40374e79b7a51 Mon Sep 17 00:00:00 2001
From: Přemysl Eric Janouch <p@janouch.name>
Date: Fri, 9 Feb 2024 17:29:07 +0100
Subject: Add a CMake module for icon conversions

---
 cmake/IconUtils.cmake | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 cmake/IconUtils.cmake

(limited to 'cmake/IconUtils.cmake')

diff --git a/cmake/IconUtils.cmake b/cmake/IconUtils.cmake
new file mode 100644
index 0000000..abd1f6a
--- /dev/null
+++ b/cmake/IconUtils.cmake
@@ -0,0 +1,40 @@
+# Public Domain
+
+function (icon_to_png name svg size output_dir output)
+	set (_dimensions "${size}x${size}")
+	set (_png_path "${output_dir}/hicolor/${_dimensions}/apps")
+	set (_png "${_png_path}/${name}.png")
+	set (${output} "${_png}" PARENT_SCOPE)
+
+	set (_find_program_REQUIRE)
+	if (NOT ${CMAKE_VERSION} VERSION_LESS 3.18.0)
+		set (_find_program_REQUIRE REQUIRED)
+	endif ()
+
+	find_program (rsvg_convert_EXECUTABLE rsvg-convert ${_find_program_REQUIRE})
+	add_custom_command (OUTPUT "${_png}"
+		COMMAND ${CMAKE_COMMAND} -E make_directory "${_png_path}"
+		COMMAND ${rsvg_convert_EXECUTABLE} "--output=${_png}"
+			"--width=${size}" "--height=${size}" -- "${svg}"
+		DEPENDS "${svg}"
+		COMMENT "Generating ${name} ${_dimensions} application icon" VERBATIM)
+endfunction ()
+
+# You should include a 256x256 icon--which takes less space as raw PNG.
+function (icon_for_win32 ico pngs pngs_raw)
+	set (_raws)
+	foreach (png ${pngs_raw})
+		list (APPEND _raws "--raw=${png}")
+	endforeach ()
+
+	set (_find_program_REQUIRE)
+	if (NOT ${CMAKE_VERSION} VERSION_LESS 3.18.0)
+		set (_find_program_REQUIRE REQUIRED)
+	endif ()
+
+	find_program (icotool_EXECUTABLE icotool ${_find_program_REQUIRE})
+	add_custom_command (OUTPUT "${ico}"
+		COMMAND ${icotool_EXECUTABLE} -c -o "${ico}" ${_raws} -- ${pngs}
+		DEPENDS ${pngs} ${pngs_raw}
+		COMMENT "Generating Windows program icon" VERBATIM)
+endfunction ()
-- 
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