[tools] SVG to ICO conversion script

GitOrigin-RevId: b83df645e1ba274ddffcf6ce9c22663a5360feac

tools/scripts/IcoGenerator.main.kts

@@ -0,0 +1,51 @@
+// Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+@file:DependsOn("com.github.weisj:jsvg:1.0.0")
+@file:DependsOn("net.ifok.image:image4j:0.7.2")
+
+import com.github.weisj.jsvg.SVGDocument
+import com.github.weisj.jsvg.attributes.ViewBox
+import com.github.weisj.jsvg.parser.SVGLoader
+import net.ifok.image.image4j.codec.ico.ICOEncoder
+import java.awt.image.BufferedImage
+import kotlin.io.path.Path
+import kotlin.io.path.createDirectories
+import kotlin.io.path.inputStream
+import kotlin.io.path.outputStream
+import kotlin.system.exitProcess
+
+if (args.size != 3) {
+  println("""
+    The script generates a product .ico file from a pair of SVG images.
+    usage: IcoGenerator /path/to/icon.svg /path/to/icon_16.svg /path/to/icon.ico
+    """.trimIndent())
+  exitProcess(1)
+}
+
+val svg = load(args[0])
+val svg16 = load(args[1])
+
+val renders = listOf(
+  render(svg, 256),
+  render(svg, 64),
+  render(svg, 48),
+  render(svg, 40),
+  render(svg, 32),
+  render(svg16, 24),
+  render(svg16, 20),
+  render(svg16, 16),
+)
+
+val ico = Path(args[2])
+ico.parent.createDirectories()
+ico.outputStream().use { ICOEncoder.write(renders, it) }
+
+fun load(path: String): SVGDocument =
+  Path(path).inputStream().use { SVGLoader().load(it) } ?: throw IllegalArgumentException("Cannot load ${path}")
+
+fun render(svg: SVGDocument, size: Int): BufferedImage {
+  val image = BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB)
+  val g = image.createGraphics()
+  svg.render(null, g, ViewBox(0f, 0f, size.toFloat(), size.toFloat()))
+  g.dispose()
+  return image
+}