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-rw-r--r--image/test/unit/test_encoder_png.js256
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diff --git a/image/test/unit/test_encoder_png.js b/image/test/unit/test_encoder_png.js
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+/*
+ * Test for PNG encoding in ImageLib
+ *
+ */
+
+var Ci = Components.interfaces;
+var Cc = Components.classes;
+
+var png1A = {
+ // A 3x3 image, rows are red, green, blue.
+ // RGB format, transparency defaults.
+
+ transparency : null,
+
+ frames : [
+ {
+ width : 3, height : 3,
+
+ format : Ci.imgIEncoder.INPUT_FORMAT_RGB, stride : 9,
+
+ pixels : [
+ 255,0,0, 255,0,0, 255,0,0,
+ 0,255,0, 0,255,0, 0,255,0,
+ 0,0,255, 0,0,255, 0,0,255,
+ ]
+ }
+
+ ],
+ expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAEUlEQVQImWP4z8AAQTAamQkAhpcI+DeMzFcAAAAASUVORK5CYII="
+};
+
+var png1B = {
+ // A 3x3 image, rows are red, green, blue.
+ // RGB format, transparency=none.
+
+ transparency : "none",
+
+ frames : [
+ {
+ width : 3, height : 3,
+
+ format : Ci.imgIEncoder.INPUT_FORMAT_RGB, stride : 9,
+
+ pixels : [
+ 255,0,0, 255,0,0, 255,0,0,
+ 0,255,0, 0,255,0, 0,255,0,
+ 0,0,255, 0,0,255, 0,0,255,
+ ]
+ }
+
+ ],
+ expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAEUlEQVQImWP4z8AAQTAamQkAhpcI+DeMzFcAAAAASUVORK5CYII="
+};
+
+var png2A = {
+ // A 3x3 image, rows are: red, green, blue. Columns are: 0%, 33%, 66% transparent.
+
+ transparency : null,
+
+ frames : [
+ {
+ width : 3, height : 3,
+
+ format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
+
+ pixels : [
+ 255,0,0,255, 255,0,0,170, 255,0,0,85,
+ 0,255,0,255, 0,255,0,170, 0,255,0,85,
+ 0,0,255,255, 0,0,255,170, 0,0,255,85
+ ]
+ }
+
+ ],
+ expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAAIElEQVQImSXJMQEAMAwEIUy+yZi8DmVFFBcjycn86GgPJw4O8v9DkkEAAAAASUVORK5CYII="
+};
+
+var png2B = {
+ // A 3x3 image, rows are: red, green, blue. Columns are: 0%, 33%, 66% transparent,
+ // but transparency will be ignored.
+
+ transparency : "none",
+
+ frames : [
+ {
+ width : 3, height : 3,
+
+ format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
+
+ pixels : [
+ 255,0,0,255, 255,0,0,170, 255,0,0,85,
+ 0,255,0,255, 0,255,0,170, 0,255,0,85,
+ 0,0,255,255, 0,0,255,170, 0,0,255,85
+ ]
+ }
+
+ ],
+ expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAEUlEQVQImWP4z8AAQTAamQkAhpcI+DeMzFcAAAAASUVORK5CYII="
+};
+
+// Main test entry point.
+function run_test() {
+ dump("Checking png1A...\n")
+ run_test_for(png1A);
+ dump("Checking png1B...\n")
+ run_test_for(png1B);
+ dump("Checking png2A...\n")
+ run_test_for(png2A);
+ dump("Checking png2B...\n")
+ run_test_for(png2B);
+};
+
+
+function run_test_for(input) {
+ var encoder, dataURL;
+
+ encoder = encodeImage(input);
+ dataURL = makeDataURL(encoder, "image/png");
+ do_check_eq(dataURL, input.expected);
+
+ encoder = encodeImageAsync(input);
+ dataURL = makeDataURLFromAsync(encoder, "image/png", input.expected);
+};
+
+
+function encodeImage(input) {
+ var encoder = Cc["@mozilla.org/image/encoder;2?type=image/png"].createInstance();
+ encoder.QueryInterface(Ci.imgIEncoder);
+
+ var options = "";
+ if (input.transparency) {
+ options += "transparency=" + input.transparency;
+ }
+
+ var frame = input.frames[0];
+ encoder.initFromData(frame.pixels, frame.pixels.length,
+ frame.width, frame.height, frame.stride,
+ frame.format, options);
+ return encoder;
+}
+
+function _encodeImageAsyncFactory(frame, options, encoder)
+{
+ function finishEncode() {
+ encoder.addImageFrame(frame.pixels, frame.pixels.length,
+ frame.width, frame.height, frame.stride,
+ frame.format, options);
+ encoder.endImageEncode();
+ }
+ return finishEncode;
+}
+
+function encodeImageAsync(input)
+{
+ var encoder = Cc["@mozilla.org/image/encoder;2?type=image/png"].createInstance();
+ encoder.QueryInterface(Ci.imgIEncoder);
+
+ var options = "";
+ if (input.transparency) {
+ options += "transparency=" + input.transparency;
+ }
+
+ var frame = input.frames[0];
+ encoder.startImageEncode(frame.width, frame.height,
+ frame.format, options);
+
+ do_timeout(50, _encodeImageAsyncFactory(frame, options, encoder));
+ return encoder;
+}
+
+
+function makeDataURL(encoder, mimetype) {
+ var rawStream = encoder.QueryInterface(Ci.nsIInputStream);
+
+ var stream = Cc["@mozilla.org/binaryinputstream;1"].createInstance();
+ stream.QueryInterface(Ci.nsIBinaryInputStream);
+
+ stream.setInputStream(rawStream);
+
+ var bytes = stream.readByteArray(stream.available()); // returns int[]
+
+ var base64String = toBase64(bytes);
+
+ return "data:" + mimetype + ";base64," + base64String;
+}
+
+function makeDataURLFromAsync(encoder, mimetype, expected) {
+ do_test_pending();
+ var rawStream = encoder.QueryInterface(Ci.nsIAsyncInputStream);
+
+ var currentThread = Cc["@mozilla.org/thread-manager;1"].getService().currentThread;
+
+ var bytes = [];
+
+ var binarystream = Cc["@mozilla.org/binaryinputstream;1"].createInstance();
+ binarystream.QueryInterface(Ci.nsIBinaryInputStream);
+
+ var asyncReader =
+ {
+ onInputStreamReady: function(stream)
+ {
+ binarystream.setInputStream(stream);
+ var available = 0;
+ try {
+ available = stream.available();
+ } catch(e) { }
+
+ if (available > 0)
+ {
+ bytes = bytes.concat(binarystream.readByteArray(available));
+ stream.asyncWait(this, 0, 0, currentThread);
+ } else {
+ var base64String = toBase64(bytes);
+ var dataURL = "data:" + mimetype + ";base64," + base64String;
+ do_check_eq(dataURL, expected);
+ do_test_finished();
+ }
+
+ }
+ };
+ rawStream.asyncWait(asyncReader, 0, 0, currentThread);
+}
+
+/* toBase64 copied from extensions/xml-rpc/src/nsXmlRpcClient.js */
+
+/* Convert data (an array of integers) to a Base64 string. */
+const toBase64Table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' +
+ '0123456789+/';
+const base64Pad = '=';
+function toBase64(data) {
+ var result = '';
+ var length = data.length;
+ var i;
+ // Convert every three bytes to 4 ascii characters.
+ for (i = 0; i < (length - 2); i += 3) {
+ result += toBase64Table[data[i] >> 2];
+ result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
+ result += toBase64Table[((data[i+1] & 0x0f) << 2) + (data[i+2] >> 6)];
+ result += toBase64Table[data[i+2] & 0x3f];
+ }
+
+ // Convert the remaining 1 or 2 bytes, pad out to 4 characters.
+ if (length%3) {
+ i = length - (length%3);
+ result += toBase64Table[data[i] >> 2];
+ if ((length%3) == 2) {
+ result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
+ result += toBase64Table[(data[i+1] & 0x0f) << 2];
+ result += base64Pad;
+ } else {
+ result += toBase64Table[(data[i] & 0x03) << 4];
+ result += base64Pad + base64Pad;
+ }
+ }
+
+ return result;
+}
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