add icon png & ico

flake.nix

@@ -74,6 +74,8 @@
           stdenv = prev.llvmPackages_13.stdenv;
         };
 
+        inherit (prev.python310Packages) cairosvg;
+
         csxcad = (prev.csxcad.overrideAttrs (new: old: {
           version = "0.6.3";
           src = prev.fetchFromGitHub {

icon/CMakeLists.txt

@@ -1,3 +1,35 @@
 
-compile_latex_file( "icon" REGISTER_TO "ICON_FILES" )
-add_custom_target( "icon" DEPENDS ${ICON_FILES} )
+# As TikZ fadings are buggy, SVG generation requires going through a PDF
+# intermediate plus a manual edition step.
+compile_latex_file( "icon" REGISTER_TO "ICON_SVG_FILE" )
+
+# Warning : order matters.
+#svg_to_png( "openemsh" SIZE 512 REGISTER_TO "ICON_PNG_FILES" )
+svg_to_png( "openemsh" SIZE 256 REGISTER_TO "ICON_PNG_FILES" )
+svg_to_png( "openemsh" SIZE 128 REGISTER_TO "ICON_PNG_FILES" )
+svg_to_png( "openemsh" SIZE 64 REGISTER_TO "ICON_PNG_FILES" )
+svg_to_png( "openemsh" SIZE 48 REGISTER_TO "ICON_PNG_FILES" )
+svg_to_png( "openemsh" SIZE 32 REGISTER_TO "ICON_PNG_FILES" )
+svg_to_png( "openemsh" SIZE 22 REGISTER_TO "ICON_PNG_FILES" )
+svg_to_png( "openemsh" SIZE 16 REGISTER_TO "ICON_PNG_FILES" )
+
+png_to_ico( "openemsh" INPUT ${ICON_PNG_FILES} REGISTER_TO "ICON_ICO_FILE" )
+
+add_custom_target( "icon"
+	DEPENDS
+		${ICON_SVG_FILE}
+		${ICON_PNG_FILES}
+		${ICON_ICO_FILE}
+	)
+
+add_custom_target( "icon_replace"
+	DEPENDS
+#		${ICON_SVG_FILE}
+		${ICON_PNG_FILES}
+		${ICON_ICO_FILE}
+	COMMAND ${CMAKE_COMMAND} -E copy
+		${ICON_PNG_FILES}
+		${ICON_ICO_FILE}
+		"${CMAKE_CURRENT_SOURCE_DIR}/"
+	COMMENT "Copying icon png and ico files back to ${CMAKE_CURRENT_SOURCE_DIR}/"
+	)