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test.tightpng.js
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import Websock from '../core/websock.js';
import Display from '../core/display.js';
import TightPngDecoder from '../core/decoders/tightpng.js';
import FakeWebSocket from './fake.websocket.js';
function testDecodeRect(decoder, x, y, width, height, data, display, depth) {
let sock;
let done = false;
sock = new Websock;
sock.open("ws://example.com");
sock.on('message', () => {
done = decoder.decodeRect(x, y, width, height, sock, display, depth);
});
// Empty messages are filtered at multiple layers, so we need to
// do a direct call
if (data.length === 0) {
done = decoder.decodeRect(x, y, width, height, sock, display, depth);
} else {
sock._websocket._receiveData(new Uint8Array(data));
}
display.flip();
return done;
}
describe('TightPng Decoder', function () {
let decoder;
let display;
before(FakeWebSocket.replace);
after(FakeWebSocket.restore);
beforeEach(function () {
decoder = new TightPngDecoder();
display = new Display(document.createElement('canvas'));
display.resize(4, 4);
});
it('should handle the TightPng encoding', async function () {
let data = [
// Control bytes
0xa0, 0xb4, 0x04,
// PNG data
0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a,
0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52,
0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04,
0x08, 0x02, 0x00, 0x00, 0x00, 0x26, 0x93, 0x09,
0x29, 0x00, 0x00, 0x01, 0x84, 0x69, 0x43, 0x43,
0x50, 0x49, 0x43, 0x43, 0x20, 0x70, 0x72, 0x6f,
0x66, 0x69, 0x6c, 0x65, 0x00, 0x00, 0x28, 0x91,
0x7d, 0x91, 0x3d, 0x48, 0xc3, 0x40, 0x18, 0x86,
0xdf, 0xa6, 0x6a, 0x45, 0x2a, 0x0e, 0x76, 0x10,
0x71, 0x08, 0x52, 0x9d, 0x2c, 0x88, 0x8a, 0x38,
0x6a, 0x15, 0x8a, 0x50, 0x21, 0xd4, 0x0a, 0xad,
0x3a, 0x98, 0x5c, 0xfa, 0x07, 0x4d, 0x1a, 0x92,
0x14, 0x17, 0x47, 0xc1, 0xb5, 0xe0, 0xe0, 0xcf,
0x62, 0xd5, 0xc1, 0xc5, 0x59, 0x57, 0x07, 0x57,
0x41, 0x10, 0xfc, 0x01, 0x71, 0x72, 0x74, 0x52,
0x74, 0x91, 0x12, 0xbf, 0x4b, 0x0a, 0x2d, 0x62,
0xbc, 0xe3, 0xb8, 0x87, 0xf7, 0xbe, 0xf7, 0xe5,
0xee, 0x3b, 0x40, 0xa8, 0x97, 0x99, 0x66, 0x75,
0x8c, 0x03, 0x9a, 0x6e, 0x9b, 0xa9, 0x44, 0x5c,
0xcc, 0x64, 0x57, 0xc5, 0xd0, 0x2b, 0xba, 0x68,
0x86, 0x31, 0x8c, 0x2e, 0x99, 0x59, 0xc6, 0x9c,
0x24, 0x25, 0xe1, 0x3b, 0xbe, 0xee, 0x11, 0xe0,
0xfb, 0x5d, 0x8c, 0x67, 0xf9, 0xd7, 0xfd, 0x39,
0x7a, 0xd5, 0x9c, 0xc5, 0x80, 0x80, 0x48, 0x3c,
0xcb, 0x0c, 0xd3, 0x26, 0xde, 0x20, 0x9e, 0xde,
0xb4, 0x0d, 0xce, 0xfb, 0xc4, 0x11, 0x56, 0x94,
0x55, 0xe2, 0x73, 0xe2, 0x31, 0x93, 0x2e, 0x48,
0xfc, 0xc8, 0x75, 0xc5, 0xe3, 0x37, 0xce, 0x05,
0x97, 0x05, 0x9e, 0x19, 0x31, 0xd3, 0xa9, 0x79,
0xe2, 0x08, 0xb1, 0x58, 0x68, 0x63, 0xa5, 0x8d,
0x59, 0xd1, 0xd4, 0x88, 0xa7, 0x88, 0xa3, 0xaa,
0xa6, 0x53, 0xbe, 0x90, 0xf1, 0x58, 0xe5, 0xbc,
0xc5, 0x59, 0x2b, 0x57, 0x59, 0xf3, 0x9e, 0xfc,
0x85, 0xe1, 0x9c, 0xbe, 0xb2, 0xcc, 0x75, 0x5a,
0x43, 0x48, 0x60, 0x11, 0x4b, 0x90, 0x20, 0x42,
0x41, 0x15, 0x25, 0x94, 0x61, 0x23, 0x46, 0xbb,
0x4e, 0x8a, 0x85, 0x14, 0x9d, 0xc7, 0x7d, 0xfc,
0x83, 0xae, 0x5f, 0x22, 0x97, 0x42, 0xae, 0x12,
0x18, 0x39, 0x16, 0x50, 0x81, 0x06, 0xd9, 0xf5,
0x83, 0xff, 0xc1, 0xef, 0xde, 0x5a, 0xf9, 0xc9,
0x09, 0x2f, 0x29, 0x1c, 0x07, 0x3a, 0x5f, 0x1c,
0xe7, 0x63, 0x04, 0x08, 0xed, 0x02, 0x8d, 0x9a,
0xe3, 0x7c, 0x1f, 0x3b, 0x4e, 0xe3, 0x04, 0x08,
0x3e, 0x03, 0x57, 0x7a, 0xcb, 0x5f, 0xa9, 0x03,
0x33, 0x9f, 0xa4, 0xd7, 0x5a, 0x5a, 0xf4, 0x08,
0xe8, 0xdb, 0x06, 0x2e, 0xae, 0x5b, 0x9a, 0xb2,
0x07, 0x5c, 0xee, 0x00, 0x03, 0x4f, 0x86, 0x6c,
0xca, 0xae, 0x14, 0xa4, 0x25, 0xe4, 0xf3, 0xc0,
0xfb, 0x19, 0x7d, 0x53, 0x16, 0xe8, 0xbf, 0x05,
0x7a, 0xd6, 0xbc, 0xbe, 0x35, 0xcf, 0x71, 0xfa,
0x00, 0xa4, 0xa9, 0x57, 0xc9, 0x1b, 0xe0, 0xe0,
0x10, 0x18, 0x2d, 0x50, 0xf6, 0xba, 0xcf, 0xbb,
0xbb, 0xdb, 0xfb, 0xf6, 0x6f, 0x4d, 0xb3, 0x7f,
0x3f, 0x0a, 0x27, 0x72, 0x7d, 0x49, 0x29, 0x8b,
0xbb, 0x00, 0x00, 0x00, 0x09, 0x70, 0x48, 0x59,
0x73, 0x00, 0x00, 0x2e, 0x23, 0x00, 0x00, 0x2e,
0x23, 0x01, 0x78, 0xa5, 0x3f, 0x76, 0x00, 0x00,
0x00, 0x07, 0x74, 0x49, 0x4d, 0x45, 0x07, 0xe4,
0x06, 0x06, 0x0c, 0x23, 0x1d, 0x3f, 0x9f, 0xbb,
0x94, 0x00, 0x00, 0x00, 0x19, 0x74, 0x45, 0x58,
0x74, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x74,
0x00, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x64,
0x20, 0x77, 0x69, 0x74, 0x68, 0x20, 0x47, 0x49,
0x4d, 0x50, 0x57, 0x81, 0x0e, 0x17, 0x00, 0x00,
0x00, 0x1e, 0x49, 0x44, 0x41, 0x54, 0x08, 0xd7,
0x65, 0xc9, 0xb1, 0x0d, 0x00, 0x00, 0x08, 0x03,
0x20, 0xea, 0xff, 0x3f, 0xd7, 0xd5, 0x44, 0x56,
0x52, 0x90, 0xc2, 0x38, 0xa2, 0xd0, 0xbc, 0x59,
0x8a, 0x9f, 0x04, 0x05, 0x6b, 0x38, 0x7b, 0xb2,
0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44,
0xae, 0x42, 0x60, 0x82,
];
let decodeDone = testDecodeRect(decoder, 0, 0, 4, 4, data, display, 24);
expect(decodeDone).to.be.true;
let targetData = new Uint8Array([
0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255,
0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255,
0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255,
0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0xff, 0x00, 0x00, 255, 0xff, 0x00, 0x00, 255
]);
// Firefox currently has some very odd rounding bug:
// https://bugzilla.mozilla.org/show_bug.cgi?id=1667747
function almost(a, b) {
let diff = Math.abs(a - b);
return diff < 30;
}
await display.flush();
expect(display).to.have.displayed(targetData, almost);
});
});