1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/test/unit/test_encoder_png.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,256 @@
1.4 +/*
1.5 + * Test for PNG encoding in libpr0n
1.6 + *
1.7 + */
1.8 +
1.9 +const Ci = Components.interfaces;
1.10 +const Cc = Components.classes;
1.11 +
1.12 +var png1A = {
1.13 + // A 3x3 image, rows are red, green, blue.
1.14 + // RGB format, transparency defaults.
1.15 +
1.16 + transparency : null,
1.17 +
1.18 + frames : [
1.19 + {
1.20 + width : 3, height : 3,
1.21 +
1.22 + format : Ci.imgIEncoder.INPUT_FORMAT_RGB, stride : 9,
1.23 +
1.24 + pixels : [
1.25 + 255,0,0, 255,0,0, 255,0,0,
1.26 + 0,255,0, 0,255,0, 0,255,0,
1.27 + 0,0,255, 0,0,255, 0,0,255,
1.28 + ]
1.29 + }
1.30 +
1.31 + ],
1.32 + expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAEUlEQVQImWP4z8AAQTAamQkAhpcI+DeMzFcAAAAASUVORK5CYII="
1.33 +};
1.34 +
1.35 +var png1B = {
1.36 + // A 3x3 image, rows are red, green, blue.
1.37 + // RGB format, transparency=none.
1.38 +
1.39 + transparency : "none",
1.40 +
1.41 + frames : [
1.42 + {
1.43 + width : 3, height : 3,
1.44 +
1.45 + format : Ci.imgIEncoder.INPUT_FORMAT_RGB, stride : 9,
1.46 +
1.47 + pixels : [
1.48 + 255,0,0, 255,0,0, 255,0,0,
1.49 + 0,255,0, 0,255,0, 0,255,0,
1.50 + 0,0,255, 0,0,255, 0,0,255,
1.51 + ]
1.52 + }
1.53 +
1.54 + ],
1.55 + expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAEUlEQVQImWP4z8AAQTAamQkAhpcI+DeMzFcAAAAASUVORK5CYII="
1.56 +};
1.57 +
1.58 +var png2A = {
1.59 + // A 3x3 image, rows are: red, green, blue. Columns are: 0%, 33%, 66% transparent.
1.60 +
1.61 + transparency : null,
1.62 +
1.63 + frames : [
1.64 + {
1.65 + width : 3, height : 3,
1.66 +
1.67 + format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
1.68 +
1.69 + pixels : [
1.70 + 255,0,0,255, 255,0,0,170, 255,0,0,85,
1.71 + 0,255,0,255, 0,255,0,170, 0,255,0,85,
1.72 + 0,0,255,255, 0,0,255,170, 0,0,255,85
1.73 + ]
1.74 + }
1.75 +
1.76 + ],
1.77 + expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAAIElEQVQImSXJMQEAMAwEIUy+yZi8DmVFFBcjycn86GgPJw4O8v9DkkEAAAAASUVORK5CYII="
1.78 +};
1.79 +
1.80 +var png2B = {
1.81 + // A 3x3 image, rows are: red, green, blue. Columns are: 0%, 33%, 66% transparent,
1.82 + // but transparency will be ignored.
1.83 +
1.84 + transparency : "none",
1.85 +
1.86 + frames : [
1.87 + {
1.88 + width : 3, height : 3,
1.89 +
1.90 + format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
1.91 +
1.92 + pixels : [
1.93 + 255,0,0,255, 255,0,0,170, 255,0,0,85,
1.94 + 0,255,0,255, 0,255,0,170, 0,255,0,85,
1.95 + 0,0,255,255, 0,0,255,170, 0,0,255,85
1.96 + ]
1.97 + }
1.98 +
1.99 + ],
1.100 + expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAAEUlEQVQImWP4z8AAQTAamQkAhpcI+DeMzFcAAAAASUVORK5CYII="
1.101 +};
1.102 +
1.103 +// Main test entry point.
1.104 +function run_test() {
1.105 + dump("Checking png1A...\n")
1.106 + run_test_for(png1A);
1.107 + dump("Checking png1B...\n")
1.108 + run_test_for(png1B);
1.109 + dump("Checking png2A...\n")
1.110 + run_test_for(png2A);
1.111 + dump("Checking png2B...\n")
1.112 + run_test_for(png2B);
1.113 +};
1.114 +
1.115 +
1.116 +function run_test_for(input) {
1.117 + var encoder, dataURL;
1.118 +
1.119 + encoder = encodeImage(input);
1.120 + dataURL = makeDataURL(encoder, "image/png");
1.121 + do_check_eq(dataURL, input.expected);
1.122 +
1.123 + encoder = encodeImageAsync(input);
1.124 + dataURL = makeDataURLFromAsync(encoder, "image/png", input.expected);
1.125 +};
1.126 +
1.127 +
1.128 +function encodeImage(input) {
1.129 + var encoder = Cc["@mozilla.org/image/encoder;2?type=image/png"].createInstance();
1.130 + encoder.QueryInterface(Ci.imgIEncoder);
1.131 +
1.132 + var options = "";
1.133 + if (input.transparency) {
1.134 + options += "transparency=" + input.transparency;
1.135 + }
1.136 +
1.137 + var frame = input.frames[0];
1.138 + encoder.initFromData(frame.pixels, frame.pixels.length,
1.139 + frame.width, frame.height, frame.stride,
1.140 + frame.format, options);
1.141 + return encoder;
1.142 +}
1.143 +
1.144 +function _encodeImageAsyncFactory(frame, options, encoder)
1.145 +{
1.146 + function finishEncode() {
1.147 + encoder.addImageFrame(frame.pixels, frame.pixels.length,
1.148 + frame.width, frame.height, frame.stride,
1.149 + frame.format, options);
1.150 + encoder.endImageEncode();
1.151 + }
1.152 + return finishEncode;
1.153 +}
1.154 +
1.155 +function encodeImageAsync(input)
1.156 +{
1.157 + var encoder = Cc["@mozilla.org/image/encoder;2?type=image/png"].createInstance();
1.158 + encoder.QueryInterface(Ci.imgIEncoder);
1.159 +
1.160 + var options = "";
1.161 + if (input.transparency) {
1.162 + options += "transparency=" + input.transparency;
1.163 + }
1.164 +
1.165 + var frame = input.frames[0];
1.166 + encoder.startImageEncode(frame.width, frame.height,
1.167 + frame.format, options);
1.168 +
1.169 + do_timeout(50, _encodeImageAsyncFactory(frame, options, encoder));
1.170 + return encoder;
1.171 +}
1.172 +
1.173 +
1.174 +function makeDataURL(encoder, mimetype) {
1.175 + var rawStream = encoder.QueryInterface(Ci.nsIInputStream);
1.176 +
1.177 + var stream = Cc["@mozilla.org/binaryinputstream;1"].createInstance();
1.178 + stream.QueryInterface(Ci.nsIBinaryInputStream);
1.179 +
1.180 + stream.setInputStream(rawStream);
1.181 +
1.182 + var bytes = stream.readByteArray(stream.available()); // returns int[]
1.183 +
1.184 + var base64String = toBase64(bytes);
1.185 +
1.186 + return "data:" + mimetype + ";base64," + base64String;
1.187 +}
1.188 +
1.189 +function makeDataURLFromAsync(encoder, mimetype, expected) {
1.190 + do_test_pending();
1.191 + var rawStream = encoder.QueryInterface(Ci.nsIAsyncInputStream);
1.192 +
1.193 + var currentThread = Cc["@mozilla.org/thread-manager;1"].getService().currentThread;
1.194 +
1.195 + var bytes = [];
1.196 +
1.197 + var binarystream = Cc["@mozilla.org/binaryinputstream;1"].createInstance();
1.198 + binarystream.QueryInterface(Ci.nsIBinaryInputStream);
1.199 +
1.200 + var asyncReader =
1.201 + {
1.202 + onInputStreamReady: function(stream)
1.203 + {
1.204 + binarystream.setInputStream(stream);
1.205 + var available = 0;
1.206 + try {
1.207 + available = stream.available();
1.208 + } catch(e) { }
1.209 +
1.210 + if (available > 0)
1.211 + {
1.212 + bytes = bytes.concat(binarystream.readByteArray(available));
1.213 + stream.asyncWait(this, 0, 0, currentThread);
1.214 + } else {
1.215 + var base64String = toBase64(bytes);
1.216 + var dataURL = "data:" + mimetype + ";base64," + base64String;
1.217 + do_check_eq(dataURL, expected);
1.218 + do_test_finished();
1.219 + }
1.220 +
1.221 + }
1.222 + };
1.223 + rawStream.asyncWait(asyncReader, 0, 0, currentThread);
1.224 +}
1.225 +
1.226 +/* toBase64 copied from extensions/xml-rpc/src/nsXmlRpcClient.js */
1.227 +
1.228 +/* Convert data (an array of integers) to a Base64 string. */
1.229 +const toBase64Table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' +
1.230 + '0123456789+/';
1.231 +const base64Pad = '=';
1.232 +function toBase64(data) {
1.233 + var result = '';
1.234 + var length = data.length;
1.235 + var i;
1.236 + // Convert every three bytes to 4 ascii characters.
1.237 + for (i = 0; i < (length - 2); i += 3) {
1.238 + result += toBase64Table[data[i] >> 2];
1.239 + result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
1.240 + result += toBase64Table[((data[i+1] & 0x0f) << 2) + (data[i+2] >> 6)];
1.241 + result += toBase64Table[data[i+2] & 0x3f];
1.242 + }
1.243 +
1.244 + // Convert the remaining 1 or 2 bytes, pad out to 4 characters.
1.245 + if (length%3) {
1.246 + i = length - (length%3);
1.247 + result += toBase64Table[data[i] >> 2];
1.248 + if ((length%3) == 2) {
1.249 + result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
1.250 + result += toBase64Table[(data[i+1] & 0x0f) << 2];
1.251 + result += base64Pad;
1.252 + } else {
1.253 + result += toBase64Table[(data[i] & 0x03) << 4];
1.254 + result += base64Pad + base64Pad;
1.255 + }
1.256 + }
1.257 +
1.258 + return result;
1.259 +}
