1 files changed, 102 insertions, 0 deletions
diff --git a/docs/mutool/examples/trace-device.js b/docs/mutool/examples/trace-device.js
new file mode 100644
index 00000000..9d7d4373
--- /dev/null
+++ b/docs/mutool/examples/trace-device.js
@@ -0,0 +1,102 @@
+var Q = JSON.stringify
+
+var pathPrinter = {
+	moveTo: function (x,y) { print("moveTo", x, y) },
+	lineTo: function (x,y) { print("lineTo", x, y) },
+	curveTo: function (x1,y1,x2,y2,x3,y3) { print("curveTo", x1, y1, x2, y2, x3 ,y3) },
+	closePath: function () { print("closePath") },
+}
+
+var textPrinter = {
+	showGlyph: function (f,m,g,u,v,b) { print("glyph",f,m,g,u,v,b) },
+}
+
+var traceDevice = {
+	fillPath: function (path, evenOdd, ctm, colorSpace, color, alpha) {
+		print("fillPath", evenOdd, ctm, colorSpace, color, alpha)
+		path.walk(pathPrinter)
+	},
+	clipPath: function (path, evenOdd, ctm) {
+		print("clipPath", evenOdd, ctm)
+		path.walk(pathPrinter)
+	},
+	strokePath: function (path, stroke, ctm, colorSpace, color, alpha) {
+		print("strokePath", Q(stroke), ctm, colorSpace, color, alpha)
+		path.walk(pathPrinter)
+	},
+	clipStrokePath: function (path, stroke, ctm) {
+		print("clipStrokePath", Q(stroke), ctm)
+		path.walk(pathPrinter)
+	},
+
+	fillText: function (text, ctm, colorSpace, color, alpha) {
+		print("fillText", ctm, colorSpace, color, alpha)
+		text.walk(textPrinter)
+	},
+	clipText: function (text, ctm) {
+		print("clipText", ctm)
+		text.walk(textPrinter)
+	},
+	strokeText: function (text, stroke, ctm, colorSpace, color, alpha) {
+		print("strokeText", Q(stroke), ctm, colorSpace, color, alpha)
+		text.walk(textPrinter)
+	},
+	clipStrokeText: function (text, stroke, ctm) {
+		print("clipStrokeText", Q(stroke), ctm)
+		text.walk(textPrinter)
+	},
+	ignoreText: function (text, ctm) {
+		print("ignoreText", ctm)
+		text.walk(textPrinter)
+	},
+
+	fillShade: function (shade, ctm, alpha) {
+		print("fillShade", shade, ctm, alpha)
+	},
+	fillImage: function (image, ctm, alpha) {
+		print("fillImage", image, ctm, alpha)
+	},
+	fillImageMask: function (image, ctm, colorSpace, color, alpha) {
+		print("fillImageMask", image, ctm, colorSpace, color, alpha)
+	},
+	clipImageMask: function (image, ctm) {
+		print("clipImageMask", image, ctm)
+	},
+
+	beginMask: function (area, luminosity, colorspace, color) {
+		print("beginMask", area, luminosity, colorspace, color)
+	},
+	endMask: function () {
+		print("endMask")
+	},
+
+	popClip: function () {
+		print("popClip")
+	},
+
+	beginGroup: function (area, isolated, knockout, blendmode, alpha) {
+		print("beginGroup", area, isolated, knockout, blendmode, alpha)
+	},
+	endGroup: function () {
+		print("endGroup")
+	},
+	beginTile: function (area, view, xstep, ystep, ctm, id) {
+		print("beginTile", area, view, xstep, ystep, ctm, id)
+		return 0
+	},
+	endTile: function () {
+		print("endTile")
+	},
+
+	close: function () {
+		print("close")
+	},
+}
+
+if (argv.length != 3)
+	print("usage: mutool run trace-device.js document.pdf pageNumber")
+else {
+	var doc = new Document(argv[1]);
+	var page = doc.loadPage(parseInt(argv[2])-1);
+	page.run(traceDevice, Identity);
+}