tests/test.display.js

   1 /* jshint expr: true */
   2 var expect = chai.expect;
   3
   4 import Base64 from '../core/base64.js';
   5 import Display from '../core/display.js';
   6 import { _forceCursorURIs, browserSupportsCursorURIs } from '../core/util/browsers.js';
   7
   8 import sinon from '../vendor/sinon.js';
   9
  10 describe('Display/Canvas Helper', function () {
  11     var checked_data = [
  12         0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255,
  13         0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255, 0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255,
  14         0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255,
  15         0x00, 0xff, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0x00, 0xff, 255, 0x00, 0x00, 0xff, 255
  16     ];
  17     checked_data = new Uint8Array(checked_data);
  18
  19     var basic_data = [0xff, 0x00, 0x00, 255, 0x00, 0xff, 0x00, 255, 0x00, 0x00, 0xff, 255, 0xff, 0xff, 0xff, 255];
  20     basic_data = new Uint8Array(basic_data);
  21
  22     function make_image_canvas (input_data) {
  23         var canvas = document.createElement('canvas');
  24         canvas.width = 4;
  25         canvas.height = 4;
  26         var ctx = canvas.getContext('2d');
  27         var data = ctx.createImageData(4, 4);
  28         for (var i = 0; i < checked_data.length; i++) { data.data[i] = input_data[i]; }
  29         ctx.putImageData(data, 0, 0);
  30         return canvas;
  31     }
  32
  33     function make_image_png (input_data) {
  34         var canvas = make_image_canvas(input_data);
  35         var url = canvas.toDataURL();
  36         var data = url.split(",")[1];
  37         return Base64.decode(data);
  38     }
  39
  40     describe('checking for cursor uri support', function () {
  41         it('should disable cursor URIs if there is no support', function () {
  42             _forceCursorURIs(false);
  43             var display = new Display(document.createElement('canvas'), { viewport: false });
  44             expect(display._cursor_uri).to.be.false;
  45         });
  46
  47         it('should enable cursor URIs if there is support', function () {
  48             _forceCursorURIs(true);
  49             var display = new Display(document.createElement('canvas'), { viewport: false });
  50             expect(display._cursor_uri).to.be.true;
  51         });
  52
  53         it('respect the cursor_uri option if there is support', function () {
  54             _forceCursorURIs(false);
  55             var display = new Display(document.createElement('canvas'), { viewport: false, cursor_uri: false });
  56             expect(display._cursor_uri).to.be.false;
  57         });
  58     });
  59
  60     describe('viewport handling', function () {
  61         var display;
  62         beforeEach(function () {
  63             display = new Display(document.createElement('canvas'), { viewport: true });
  64             display.resize(5, 5);
  65             display.viewportChangeSize(3, 3);
  66             display.viewportChangePos(1, 1);
  67         });
  68
  69         it('should take viewport location into consideration when drawing images', function () {
  70             display.resize(4, 4);
  71             display.viewportChangeSize(2, 2);
  72             display.drawImage(make_image_canvas(basic_data), 1, 1);
  73             display.flip();
  74
  75             var expected = new Uint8Array(16);
  76             var i;
  77             for (i = 0; i < 8; i++) { expected[i] = basic_data[i]; }
  78             for (i = 8; i < 16; i++) { expected[i] = 0; }
  79             expect(display).to.have.displayed(expected);
  80         });
  81
  82         it('should resize the target canvas when resizing the viewport', function() {
  83             display.viewportChangeSize(2, 2);
  84             expect(display._target.width).to.equal(2);
  85             expect(display._target.height).to.equal(2);
  86         });
  87
  88         it('should move the viewport if necessary', function() {
  89             display.viewportChangeSize(5, 5);
  90             expect(display.absX(0)).to.equal(0);
  91             expect(display.absY(0)).to.equal(0);
  92             expect(display._target.width).to.equal(5);
  93             expect(display._target.height).to.equal(5);
  94         });
  95
  96         it('should limit the viewport to the framebuffer size', function() {
  97             display.viewportChangeSize(6, 6);
  98             expect(display._target.width).to.equal(5);
  99             expect(display._target.height).to.equal(5);
 100         });
 101
 102         it('should redraw when moving the viewport', function () {
 103             display.flip = sinon.spy();
 104             display.viewportChangePos(-1, 1);
 105             expect(display.flip).to.have.been.calledOnce;
 106         });
 107
 108         it('should redraw when resizing the viewport', function () {
 109             display.flip = sinon.spy();
 110             display.viewportChangeSize(2, 2);
 111             expect(display.flip).to.have.been.calledOnce;
 112         });
 113
 114         it('should report clipping when framebuffer > viewport', function () {
 115             var clipping = display.clippingDisplay();
 116             expect(clipping).to.be.true;
 117         });
 118
 119         it('should report not clipping when framebuffer = viewport', function () {
 120             display.viewportChangeSize(5, 5);
 121             var clipping = display.clippingDisplay();
 122             expect(clipping).to.be.false;
 123         });
 124
 125         it('should show the entire framebuffer when disabling the viewport', function() {
 126             display.set_viewport(false);
 127             expect(display.absX(0)).to.equal(0);
 128             expect(display.absY(0)).to.equal(0);
 129             expect(display._target.width).to.equal(5);
 130             expect(display._target.height).to.equal(5);
 131         });
 132
 133         it('should ignore viewport changes when the viewport is disabled', function() {
 134             display.set_viewport(false);
 135             display.viewportChangeSize(2, 2);
 136             display.viewportChangePos(1, 1);
 137             expect(display.absX(0)).to.equal(0);
 138             expect(display.absY(0)).to.equal(0);
 139             expect(display._target.width).to.equal(5);
 140             expect(display._target.height).to.equal(5);
 141         });
 142
 143         it('should show the entire framebuffer just after enabling the viewport', function() {
 144             display.set_viewport(false);
 145             display.set_viewport(true);
 146             expect(display.absX(0)).to.equal(0);
 147             expect(display.absY(0)).to.equal(0);
 148             expect(display._target.width).to.equal(5);
 149             expect(display._target.height).to.equal(5);
 150         });
 151     });
 152
 153     describe('resizing', function () {
 154         var display;
 155         beforeEach(function () {
 156             display = new Display(document.createElement('canvas'), { viewport: false });
 157             display.resize(4, 4);
 158         });
 159
 160         it('should change the size of the logical canvas', function () {
 161             display.resize(5, 7);
 162             expect(display._fb_width).to.equal(5);
 163             expect(display._fb_height).to.equal(7);
 164         });
 165
 166         it('should keep the framebuffer data', function () {
 167             display.fillRect(0, 0, 4, 4, [0, 0, 0xff]);
 168             display.resize(2, 2);
 169             display.flip();
 170             var expected = [];
 171             for (var i = 0; i < 4 * 2*2; i += 4) {
 172                 expected[i] = 0xff;
 173                 expected[i+1] = expected[i+2] = 0;
 174                 expected[i+3] = 0xff;
 175             }
 176             expect(display).to.have.displayed(new Uint8Array(expected));
 177         });
 178
 179         describe('viewport', function () {
 180             beforeEach(function () {
 181                 display.set_viewport(true);
 182                 display.viewportChangeSize(3, 3);
 183                 display.viewportChangePos(1, 1);
 184             });
 185
 186             it('should keep the viewport position and size if possible', function () {
 187                 display.resize(6, 6);
 188                 expect(display.absX(0)).to.equal(1);
 189                 expect(display.absY(0)).to.equal(1);
 190                 expect(display._target.width).to.equal(3);
 191                 expect(display._target.height).to.equal(3);
 192             });
 193
 194             it('should move the viewport if necessary', function () {
 195                 display.resize(3, 3);
 196                 expect(display.absX(0)).to.equal(0);
 197                 expect(display.absY(0)).to.equal(0);
 198                 expect(display._target.width).to.equal(3);
 199                 expect(display._target.height).to.equal(3);
 200             });
 201
 202             it('should shrink the viewport if necessary', function () {
 203                 display.resize(2, 2);
 204                 expect(display.absX(0)).to.equal(0);
 205                 expect(display.absY(0)).to.equal(0);
 206                 expect(display._target.width).to.equal(2);
 207                 expect(display._target.height).to.equal(2);
 208             });
 209         });
 210     });
 211
 212     describe('rescaling', function () {
 213         var display;
 214         var canvas;
 215
 216         beforeEach(function () {
 217             canvas = document.createElement('canvas');
 218             display = new Display(canvas, { viewport: true });
 219             display.resize(4, 4);
 220             display.viewportChangeSize(3, 3);
 221             display.viewportChangePos(1, 1);
 222             document.body.appendChild(canvas);
 223         });
 224
 225         afterEach(function () {
 226             document.body.removeChild(canvas);
 227         });
 228
 229         it('should not change the bitmap size of the canvas', function () {
 230             display.set_scale(2.0);
 231             expect(canvas.width).to.equal(3);
 232             expect(canvas.height).to.equal(3);
 233         });
 234
 235         it('should change the effective rendered size of the canvas', function () {
 236             display.set_scale(2.0);
 237             expect(canvas.clientWidth).to.equal(6);
 238             expect(canvas.clientHeight).to.equal(6);
 239         });
 240
 241         it('should not change when resizing', function () {
 242             display.set_scale(2.0);
 243             display.resize(5, 5);
 244             expect(display.get_scale()).to.equal(2.0);
 245             expect(canvas.width).to.equal(3);
 246             expect(canvas.height).to.equal(3);
 247             expect(canvas.clientWidth).to.equal(6);
 248             expect(canvas.clientHeight).to.equal(6);
 249         });
 250     });
 251
 252     describe('autoscaling', function () {
 253         var display;
 254         var canvas;
 255
 256         beforeEach(function () {
 257             canvas = document.createElement('canvas');
 258             display = new Display(canvas, { viewport: true });
 259             display.resize(4, 3);
 260             document.body.appendChild(canvas);
 261         });
 262
 263         afterEach(function () {
 264             document.body.removeChild(canvas);
 265         });
 266
 267         it('should preserve aspect ratio while autoscaling', function () {
 268             display.autoscale(16, 9);
 269             expect(canvas.clientWidth / canvas.clientHeight).to.equal(4 / 3);
 270         });
 271
 272         it('should use width to determine scale when the current aspect ratio is wider than the target', function () {
 273             display.autoscale(9, 16);
 274             expect(display.absX(9)).to.equal(4);
 275             expect(display.absY(18)).to.equal(8);
 276             expect(canvas.clientWidth).to.equal(9);
 277             expect(canvas.clientHeight).to.equal(7); // round 9 / (4 / 3)
 278         });
 279
 280         it('should use height to determine scale when the current aspect ratio is taller than the target', function () {
 281             display.autoscale(16, 9);
 282             expect(display.absX(9)).to.equal(3);
 283             expect(display.absY(18)).to.equal(6);
 284             expect(canvas.clientWidth).to.equal(12);  // 16 * (4 / 3)
 285             expect(canvas.clientHeight).to.equal(9);
 286
 287         });
 288
 289         it('should not change the bitmap size of the canvas', function () {
 290             display.autoscale(16, 9);
 291             expect(canvas.width).to.equal(4);
 292             expect(canvas.height).to.equal(3);
 293         });
 294
 295         it('should not upscale when downscaleOnly is true', function () {
 296             display.autoscale(2, 2, true);
 297             expect(display.absX(9)).to.equal(18);
 298             expect(display.absY(18)).to.equal(36);
 299             expect(canvas.clientWidth).to.equal(2);
 300             expect(canvas.clientHeight).to.equal(2);
 301
 302             display.autoscale(16, 9, true);
 303             expect(display.absX(9)).to.equal(9);
 304             expect(display.absY(18)).to.equal(18);
 305             expect(canvas.clientWidth).to.equal(4);
 306             expect(canvas.clientHeight).to.equal(3);
 307         });
 308     });
 309
 310     describe('drawing', function () {
 311
 312         // TODO(directxman12): improve the tests for each of the drawing functions to cover more than just the
 313         //                     basic cases
 314         var display;
 315         beforeEach(function () {
 316             display = new Display(document.createElement('canvas'));
 317             display.resize(4, 4);
 318         });
 319
 320         it('should clear the screen on #clear without a logo set', function () {
 321             display.fillRect(0, 0, 4, 4, [0x00, 0x00, 0xff]);
 322             display._logo = null;
 323             display.clear();
 324             display.resize(4, 4);
 325             var empty = [];
 326             for (var i = 0; i < 4 * display._fb_width * display._fb_height; i++) { empty[i] = 0; }
 327             expect(display).to.have.displayed(new Uint8Array(empty));
 328         });
 329
 330         it('should draw the logo on #clear with a logo set', function (done) {
 331             display._logo = { width: 4, height: 4, type: "image/png", data: make_image_png(checked_data) };
 332             display.clear();
 333             display.set_onFlush(function () {
 334                 expect(display).to.have.displayed(checked_data);
 335                 expect(display._fb_width).to.equal(4);
 336                 expect(display._fb_height).to.equal(4);
 337                 done();
 338             });
 339             display.flush();
 340         });
 341
 342         it('should not draw directly on the target canvas', function () {
 343             display.fillRect(0, 0, 4, 4, [0, 0, 0xff]);
 344             display.flip();
 345             display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
 346             var expected = [];
 347             for (var i = 0; i < 4 * display._fb_width * display._fb_height; i += 4) {
 348                 expected[i] = 0xff;
 349                 expected[i+1] = expected[i+2] = 0;
 350                 expected[i+3] = 0xff;
 351             }
 352             expect(display).to.have.displayed(new Uint8Array(expected));
 353         });
 354
 355         it('should support filling a rectangle with particular color via #fillRect', function () {
 356             display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
 357             display.fillRect(0, 0, 2, 2, [0xff, 0, 0]);
 358             display.fillRect(2, 2, 2, 2, [0xff, 0, 0]);
 359             display.flip();
 360             expect(display).to.have.displayed(checked_data);
 361         });
 362
 363         it('should support copying an portion of the canvas via #copyImage', function () {
 364             display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
 365             display.fillRect(0, 0, 2, 2, [0xff, 0, 0x00]);
 366             display.copyImage(0, 0, 2, 2, 2, 2);
 367             display.flip();
 368             expect(display).to.have.displayed(checked_data);
 369         });
 370
 371         it('should support drawing images via #imageRect', function (done) {
 372             display.imageRect(0, 0, "image/png", make_image_png(checked_data));
 373             display.flip();
 374             display.set_onFlush(function () {
 375                 expect(display).to.have.displayed(checked_data);
 376                 done();
 377             });
 378             display.flush();
 379         });
 380
 381         it('should support drawing tile data with a background color and sub tiles', function () {
 382             display.startTile(0, 0, 4, 4, [0, 0xff, 0]);
 383             display.subTile(0, 0, 2, 2, [0xff, 0, 0]);
 384             display.subTile(2, 2, 2, 2, [0xff, 0, 0]);
 385             display.finishTile();
 386             display.flip();
 387             expect(display).to.have.displayed(checked_data);
 388         });
 389
 390         it('should support drawing BGRX blit images with true color via #blitImage', function () {
 391             var data = [];
 392             for (var i = 0; i < 16; i++) {
 393                 data[i * 4] = checked_data[i * 4 + 2];
 394                 data[i * 4 + 1] = checked_data[i * 4 + 1];
 395                 data[i * 4 + 2] = checked_data[i * 4];
 396                 data[i * 4 + 3] = checked_data[i * 4 + 3];
 397             }
 398             display.blitImage(0, 0, 4, 4, data, 0);
 399             display.flip();
 400             expect(display).to.have.displayed(checked_data);
 401         });
 402
 403         it('should support drawing RGB blit images with true color via #blitRgbImage', function () {
 404             var data = [];
 405             for (var i = 0; i < 16; i++) {
 406                 data[i * 3] = checked_data[i * 4];
 407                 data[i * 3 + 1] = checked_data[i * 4 + 1];
 408                 data[i * 3 + 2] = checked_data[i * 4 + 2];
 409             }
 410             display.blitRgbImage(0, 0, 4, 4, data, 0);
 411             display.flip();
 412             expect(display).to.have.displayed(checked_data);
 413         });
 414
 415         it('should support drawing an image object via #drawImage', function () {
 416             var img = make_image_canvas(checked_data);
 417             display.drawImage(img, 0, 0);
 418             display.flip();
 419             expect(display).to.have.displayed(checked_data);
 420         });
 421     });
 422
 423     describe('the render queue processor', function () {
 424         var display;
 425         beforeEach(function () {
 426             display = new Display(document.createElement('canvas'));
 427             display.resize(4, 4);
 428             sinon.spy(display, '_scan_renderQ');
 429         });
 430
 431         afterEach(function () {
 432             window.requestAnimationFrame = this.old_requestAnimationFrame;
 433         });
 434
 435         it('should try to process an item when it is pushed on, if nothing else is on the queue', function () {
 436             display._renderQ_push({ type: 'noop' });  // does nothing
 437             expect(display._scan_renderQ).to.have.been.calledOnce;
 438         });
 439
 440         it('should not try to process an item when it is pushed on if we are waiting for other items', function () {
 441             display._renderQ.length = 2;
 442             display._renderQ_push({ type: 'noop' });
 443             expect(display._scan_renderQ).to.not.have.been.called;
 444         });
 445
 446         it('should wait until an image is loaded to attempt to draw it and the rest of the queue', function () {
 447             var img = { complete: false, addEventListener: sinon.spy() }
 448             display._renderQ = [{ type: 'img', x: 3, y: 4, img: img },
 449                                 { type: 'fill', x: 1, y: 2, width: 3, height: 4, color: 5 }];
 450             display.drawImage = sinon.spy();
 451             display.fillRect = sinon.spy();
 452
 453             display._scan_renderQ();
 454             expect(display.drawImage).to.not.have.been.called;
 455             expect(display.fillRect).to.not.have.been.called;
 456             expect(img.addEventListener).to.have.been.calledOnce;
 457
 458             display._renderQ[0].img.complete = true;
 459             display._scan_renderQ();
 460             expect(display.drawImage).to.have.been.calledOnce;
 461             expect(display.fillRect).to.have.been.calledOnce;
 462             expect(img.addEventListener).to.have.been.calledOnce;
 463         });
 464
 465         it('should call callback when queue is flushed', function () {
 466             display.set_onFlush(sinon.spy());
 467             display.fillRect(0, 0, 4, 4, [0, 0xff, 0]);
 468             expect(display.get_onFlush()).to.not.have.been.called;
 469             display.flush();
 470             expect(display.get_onFlush()).to.have.been.calledOnce;
 471         });
 472
 473         it('should draw a blit image on type "blit"', function () {
 474             display.blitImage = sinon.spy();
 475             display._renderQ_push({ type: 'blit', x: 3, y: 4, width: 5, height: 6, data: [7, 8, 9] });
 476             expect(display.blitImage).to.have.been.calledOnce;
 477             expect(display.blitImage).to.have.been.calledWith(3, 4, 5, 6, [7, 8, 9], 0);
 478         });
 479
 480         it('should draw a blit RGB image on type "blitRgb"', function () {
 481             display.blitRgbImage = sinon.spy();
 482             display._renderQ_push({ type: 'blitRgb', x: 3, y: 4, width: 5, height: 6, data: [7, 8, 9] });
 483             expect(display.blitRgbImage).to.have.been.calledOnce;
 484             expect(display.blitRgbImage).to.have.been.calledWith(3, 4, 5, 6, [7, 8, 9], 0);
 485         });
 486
 487         it('should copy a region on type "copy"', function () {
 488             display.copyImage = sinon.spy();
 489             display._renderQ_push({ type: 'copy', x: 3, y: 4, width: 5, height: 6, old_x: 7, old_y: 8 });
 490             expect(display.copyImage).to.have.been.calledOnce;
 491             expect(display.copyImage).to.have.been.calledWith(7, 8, 3, 4, 5, 6);
 492         });
 493
 494         it('should fill a rect with a given color on type "fill"', function () {
 495             display.fillRect = sinon.spy();
 496             display._renderQ_push({ type: 'fill', x: 3, y: 4, width: 5, height: 6, color: [7, 8, 9]});
 497             expect(display.fillRect).to.have.been.calledOnce;
 498             expect(display.fillRect).to.have.been.calledWith(3, 4, 5, 6, [7, 8, 9]);
 499         });
 500
 501         it('should draw an image from an image object on type "img" (if complete)', function () {
 502             display.drawImage = sinon.spy();
 503             display._renderQ_push({ type: 'img', x: 3, y: 4, img: { complete: true } });
 504             expect(display.drawImage).to.have.been.calledOnce;
 505             expect(display.drawImage).to.have.been.calledWith({ complete: true }, 3, 4);
 506         });
 507     });
 508 });