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gecko/modules/libpr0n/test/unit/test_encoder_apng.js

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/*
* Test for APNG encoding in libpr0n
*
*/
const Ci = Components.interfaces;
const Cc = Components.classes;
// dispose=[none|background|previous]
// blend=[source|over]
var apng1A = {
// A 3x3 image with 3 frames, alternating red, green, blue. RGB format.
width : 3, height : 3, skipFirstFrame : false,
format : Ci.imgIEncoder.INPUT_FORMAT_RGB,
transparency : null,
plays : 0,
frames : [
{ // frame #1
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGB, stride : 9,
transparency : null,
pixels : [
255,0,0, 255,0,0, 255,0,0,
255,0,0, 255,0,0, 255,0,0,
255,0,0, 255,0,0, 255,0,0
]
},
{ // frame #2
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGB, stride : 9,
transparency : null,
pixels : [
0,255,0, 0,255,0, 0,255,0,
0,255,0, 0,255,0, 0,255,0,
0,255,0, 0,255,0, 0,255,0
]
},
{ // frame #3
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGB, stride : 9,
transparency : null,
pixels : [
0,0,255, 0,0,255, 0,0,255,
0,0,255, 0,0,255, 0,0,255,
0,0,255, 0,0,255, 0,0,255
]
}
],
expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAABBJREFUCJlj+M/AAEEMWFgAj44I+H2CySsAAAAaZmNUTAAAAAEAAAADAAAAAwAAAAAAAAAAAfQD6AAA7mXKzAAAABNmZEFUAAAAAgiZY2D4zwBFWFgAhpcI+I731VcAAAAaZmNUTAAAAAMAAAADAAAAAwAAAAAAAAAAAfQD6AAAA/MZJQAAABNmZEFUAAAABAiZY2Bg+A9DmCwAfaAI+AGmQVoAAAAASUVORK5CYII="
};
var apng1B = {
// A 3x3 image with 3 frames, alternating red, green, blue. RGBA format.
width : 3, height : 3, skipFirstFrame : false,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA,
transparency : null,
plays : 0,
frames : [
{ // frame #1
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255
]
},
{ // frame #2
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,255,0,255, 0,255,0,255, 0,255,0,255,
0,255,0,255, 0,255,0,255, 0,255,0,255,
0,255,0,255, 0,255,0,255, 0,255,0,255
]
},
{ // frame #3
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,0,255,255, 0,0,255,255, 0,0,255,255,
0,0,255,255, 0,0,255,255, 0,0,255,255,
0,0,255,255, 0,0,255,255, 0,0,255,255
]
}
],
expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAABFJREFUCJlj+M/A8B+GGXByAF3XEe/CoiJ1AAAAGmZjVEwAAAABAAAAAwAAAAMAAAAAAAAAAAH0A+gAAO5lyswAAAASZmRBVAAAAAIImWNg+I8EcXIAVOAR77Vyl9QAAAAaZmNUTAAAAAMAAAADAAAAAwAAAAAAAAAAAfQD6AAAA/MZJQAAABRmZEFUAAAABAiZY2Bg+P8fgXFxAEvpEe8rClxSAAAAAElFTkSuQmCC"
};
var apng1C = {
// A 3x3 image with 3 frames, alternating red, green, blue. RGBA format.
// The first frame is skipped, so it will only flash green/blue (or static red in an APNG-unaware viewer)
width : 3, height : 3, skipFirstFrame : true,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA,
transparency : null,
plays : 0,
frames : [
{ // frame #1
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255
]
},
{ // frame #2
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,255,0,255, 0,255,0,255, 0,255,0,255,
0,255,0,255, 0,255,0,255, 0,255,0,255,
0,255,0,255, 0,255,0,255, 0,255,0,255
]
},
{ // frame #3
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,0,255,255, 0,0,255,255, 0,0,255,255,
0,0,255,255, 0,0,255,255, 0,0,255,255,
0,0,255,255, 0,0,255,255, 0,0,255,255
]
}
],
expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAACGFjVEwAAAACAAAAAPONk3AAAAARSURBVAiZY/jPwPAfhhlwcgBd1xHvwqIidQAAABpmY1RMAAAAAAAAAAMAAAADAAAAAAAAAAAB9APoAAB1FiAYAAAAEmZkQVQAAAABCJljYPiPBHFyAFTgEe+kD/2tAAAAGmZjVEwAAAACAAAAAwAAAAMAAAAAAAAAAAH0A+gAAJiA8/EAAAAUZmRBVAAAAAMImWNgYPj/H4FxcQBL6RHvC5ggGQAAAABJRU5ErkJggg=="
};
var apng2A = {
// A 3x3 image with 3 frames, alternating red, green, blue. RGBA format.
// blend = over mode
// (The green frame is a horizontal gradient, and the blue frame is a
// vertical gradient. They stack as they animate.)
width : 3, height : 3, skipFirstFrame : false,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA,
transparency : null,
plays : 0,
frames : [
{ // frame #1
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255
]
},
{ // frame #2
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "over", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,255,0,255, 0,255,0,180, 0,255,0,75,
0,255,0,255, 0,255,0,180, 0,255,0,75,
0,255,0,255, 0,255,0,180, 0,255,0,75
]
},
{ // frame #3
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "over", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,0,255,75, 0,0,255,75, 0,0,255,75,
0,0,255,180, 0,0,255,180, 0,0,255,180,
0,0,255,255, 0,0,255,255, 0,0,255,255
]
}
],
expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAABFJREFUCJlj+M/A8B+GGXByAF3XEe/CoiJ1AAAAGmZjVEwAAAABAAAAAwAAAAMAAAAAAAAAAAH0A+gAAZli+loAAAAcZmRBVAAAAAIImWNg+M/wn+E/wxaG/wzeDDg5ACeGDvKVa3pyAAAAGmZjVEwAAAADAAAAAwAAAAMAAAAAAAAAAAH0A+gAAXT0KbMAAAAcZmRBVAAAAAQImWNgYPjvjcAM/7cgMMP//zAMAPqkDvLn1m3SAAAAAElFTkSuQmCC"
};
var apng2B = {
// A 3x3 image with 3 frames, alternating red, green, blue. RGBA format.
// blend = over, dispose = background
// (The green frame is a horizontal gradient, and the blue frame is a
// vertical gradient. Each frame is displayed individually, blended to
// whatever the background is.)
width : 3, height : 3, skipFirstFrame : false,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA,
transparency : null,
plays : 0,
frames : [
{ // frame #1
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "background", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255,
255,0,0,255, 255,0,0,255, 255,0,0,255
]
},
{ // frame #2
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "background", blend : "over", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,255,0,255, 0,255,0,180, 0,255,0,75,
0,255,0,255, 0,255,0,180, 0,255,0,75,
0,255,0,255, 0,255,0,180, 0,255,0,75
]
},
{ // frame #3
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "background", blend : "over", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,0,255,75, 0,0,255,75, 0,0,255,75,
0,0,255,180, 0,0,255,180, 0,0,255,180,
0,0,255,255, 0,0,255,255, 0,0,255,255
]
}
],
expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AEAbA0RWQAAABFJREFUCJlj+M/A8B+GGXByAF3XEe/CoiJ1AAAAGmZjVEwAAAABAAAAAwAAAAMAAAAAAAAAAAH0A+gBAYB5yxsAAAAcZmRBVAAAAAIImWNg+M/wn+E/wxaG/wzeDDg5ACeGDvKVa3pyAAAAGmZjVEwAAAADAAAAAwAAAAMAAAAAAAAAAAH0A+gBAW3vGPIAAAAcZmRBVAAAAAQImWNgYPjvjcAM/7cgMMP//zAMAPqkDvLn1m3SAAAAAElFTkSuQmCC"
};
var apng3 = {
// A 3x3 image with 4 frames. First frame is white, then 1x1 frames draw a diagonal line
width : 3, height : 3, skipFirstFrame : false,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA,
transparency : null,
plays : 0,
frames : [
{ // frame #1
width : 3, height : 3,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
255,255,255,255, 255,255,255,255, 255,255,255,255,
255,255,255,255, 255,255,255,255, 255,255,255,255,
255,255,255,255, 255,255,255,255, 255,255,255,255
]
},
{ // frame #2
width : 1, height : 1,
x_offset : 0, y_offset : 0,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,0,0,255
]
},
{ // frame #3
width : 1, height : 1,
x_offset : 1, y_offset : 1,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,0,0,255
]
},
{ // frame #4
width : 1, height : 1,
x_offset : 2, y_offset : 2,
dispose : "none", blend : "source", delay : 500,
format : Ci.imgIEncoder.INPUT_FORMAT_RGBA, stride : 12,
pixels : [
0,0,0,255
]
}
],
expected : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAYAAABWKLW/AAAACGFjVEwAAAAEAAAAAHzNZtAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAAA5JREFUCJlj+I8EGHByALuHI91kueRqAAAAGmZjVEwAAAABAAAAAQAAAAEAAAAAAAAAAAH0A+gAADJXfawAAAARZmRBVAAAAAIImWNgYGD4DwABBAEAbr5mpgAAABpmY1RMAAAAAwAAAAEAAAABAAAAAQAAAAEB9APoAAC4OHoxAAAAEWZkQVQAAAAECJljYGBg+A8AAQQBAJZ8LRAAAAAaZmNUTAAAAAUAAAABAAAAAQAAAAIAAAACAfQD6AAA/fh01wAAABFmZEFUAAAABgiZY2BgYPgPAAEEAQB3Eum9AAAAAElFTkSuQmCC"
};
// Main test entry point.
function run_test() {
dump("Checking apng1A...\n");
run_test_for(apng1A);
dump("Checking apng1B...\n");
run_test_for(apng1B);
dump("Checking apng1C...\n");
run_test_for(apng1C);
dump("Checking apng2A...\n");
run_test_for(apng2A);
dump("Checking apng2B...\n");
run_test_for(apng2B);
dump("Checking apng3...\n");
run_test_for(apng3);
};
function run_test_for(input) {
var encoder, dataURL;
encoder = encodeImage(input);
dataURL = makeDataURL(encoder, "image/png");
do_check_eq(dataURL, 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; }
options += ";frames=" + input.frames.length;
options += ";skipfirstframe=" + (input.skipFirstFrame ? "yes" : "no");
options += ";plays=" + input.plays;
encoder.startImageEncode(input.width, input.height, input.format, options);
for (var i = 0; i < input.frames.length; i++) {
var frame = input.frames[i];
options = "";
if (frame.transparency) { options += "transparency=" + input.transparency; }
options += ";delay=" + frame.delay;
options += ";dispose=" + frame.dispose;
options += ";blend=" + frame.blend;
if (frame.x_offset > 0) { options += ";xoffset=" + frame.x_offset; }
if (frame.y_offset > 0) { options += ";yoffset=" + frame.y_offset; }
encoder.addImageFrame(frame.pixels, frame.pixels.length,
frame.width, frame.height, frame.stride, frame.format, options);
}
encoder.endImageEncode();
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;
}
/* 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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