/*
 * Test for APNG encoding in ImageLib
 *
 */

// 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,iVBORw0KGgoAAAANSUhEUgAAAAMAAAADCAIAAADZSiLoAAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAAA9JREFUCFtj/M8ABYxYWAA5IQMBD9nE1QAAABpmY1RMAAAAAQAAAAMAAAADAAAAAAAAAAAB9APoAADuZcrMAAAAFGZkQVQAAAACCFtjZPjPAAGMWFgANiQDAVBdoI8AAAAaZmNUTAAAAAMAAAADAAAAAwAAAAAAAAAAAfQD6AAAA/MZJQAAABVmZEFUAAAABAhbY2Rg+M8ABoxYWAAzJwMBWk5KPwAAAABJRU5ErkJggg==",
};

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/AAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAABJJREFUCFtj/M/AAEQQwIiTAwCM6AX+t+X3FQAAABpmY1RMAAAAAQAAAAMAAAADAAAAAAAAAAAB9APoAADuZcrMAAAAFWZkQVQAAAACCFtjZPgPhFDAiJMDAInrBf4Q0nfOAAAAGmZjVEwAAAADAAAAAwAAAAMAAAAAAAAAAAH0A+gAAAPzGSUAAAAWZmRBVAAAAAQIW2NkYPj/nwEKGHFyAIbuBf50PCpiAAAAAElFTkSuQmCC",
};

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/AAAACGFjVEwAAAACAAAAAPONk3AAAAASSURBVAhbY/zPwABEEMCIkwMAjOgF/rfl9xUAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAABVmZEFUAAAAAQhbY2T4D4RQwIiTAwCJ6wX++lSqrAAAABpmY1RMAAAAAgAAAAMAAAADAAAAAAAAAAAB9APoAACYgPPxAAAAFmZkQVQAAAADCFtjZGD4/58BChhxcgCG7gX+PgKhKQAAAABJRU5ErkJggg==",
};

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/AAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAABJJREFUCFtj/M/AAEQQwIiTAwCM6AX+t+X3FQAAABpmY1RMAAAAAQAAAAMAAAADAAAAAAAAAAAB9APoAAGZYvpaAAAAGWZkQVQAAAACCFtjZPgPhAwMW4F4OiNODgDI3wnis0vjTAAAABpmY1RMAAAAAwAAAAMAAAADAAAAAAAAAAAB9APoAAF09CmzAAAAHGZkQVQAAAAECFtjZGD4780ABYxAzhZkzn8YBwBn4AT/ernr+wAAAABJRU5ErkJggg==",
};

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/AAAACGFjVEwAAAADAAAAAM7tusAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AEAbA0RWQAAABJJREFUCFtj/M/AAEQQwIiTAwCM6AX+t+X3FQAAABpmY1RMAAAAAQAAAAMAAAADAAAAAAAAAAAB9APoAQGAecsbAAAAGWZkQVQAAAACCFtjZPgPhAwMW4F4OiNODgDI3wnis0vjTAAAABpmY1RMAAAAAwAAAAMAAAADAAAAAAAAAAAB9APoAQFt7xjyAAAAHGZkQVQAAAAECFtjZGD4780ABYxAzhZkzn8YBwBn4AT/ernr+wAAAABJRU5ErkJggg==",
};

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/AAAACGFjVEwAAAAEAAAAAHzNZtAAAAAaZmNUTAAAAAAAAAADAAAAAwAAAAAAAAAAAfQD6AAAdRYgGAAAABFJREFUCFtj/A8EDFDAiJMDABlqC/jamhxvAAAAGmZjVEwAAAABAAAAAQAAAAEAAAAAAAAAAAH0A+gAADJXfawAAAARZmRBVAAAAAIIW2NgYGD4DwABBAEA0iEgKQAAABpmY1RMAAAAAwAAAAEAAAABAAAAAQAAAAEB9APoAAC4OHoxAAAAEWZkQVQAAAAECFtjYGBg+A8AAQQBACrja58AAAAaZmNUTAAAAAUAAAABAAAAAQAAAAIAAAACAfQD6AAA/fh01wAAABFmZEFUAAAABghbY2BgYPgPAAEEAQDLja8yAAAAAElFTkSuQmCC",
};

// 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");
  Assert.equal(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 =
  // eslint-disable-next-line no-useless-concat
  "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;
}