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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 // |
| 5 // Canvas API tests. Some of these are adapted from: |
| 6 // |
| 7 // http://www.html5canvastutorials.com/ |
| 8 |
| 9 library openglui_canvas_tests; |
| 10 |
| 11 import 'gl.dart'; |
| 12 import 'dart:math' as Math; |
| 13 |
| 14 var ctx; |
| 15 var width, height; |
| 16 bool isDirty = true; |
| 17 var canvas; |
| 18 |
| 19 void resize(int w, int h) { |
| 20 width = w; |
| 21 height = h; |
| 22 } |
| 23 |
| 24 void setup(canvasp, int w, int h) { |
| 25 if (canvasp == null) { |
| 26 canvas = new CanvasElement(width: w, height: h); |
| 27 } else { |
| 28 canvas = canvasp; |
| 29 // called from gl_driver.dart. |
| 30 // This is a kludge; we need a clean way of handling events. |
| 31 canvas.on.mouseDown.add((e) { |
| 32 ++testnum; |
| 33 }); |
| 34 } |
| 35 ctx = canvas.getContext("2d"); |
| 36 if (ctx == null) { |
| 37 throw "Failed to get 2D context"; |
| 38 } |
| 39 resize(w, h); |
| 40 log("Done setup"); |
| 41 } |
| 42 |
| 43 resetCanvas() { |
| 44 ctx.globalCompositeOperation = "source-over"; |
| 45 ctx.setTransform(1, 0, 0, 1, 0, 0); |
| 46 ctx.fillStyle = "#FFFFFF"; |
| 47 ctx.clearRect(0, 0, width, height); |
| 48 ctx.shadowOffsetX = ctx.shadowOffsetY = ctx.shadowBlur = 0.0; |
| 49 ctx.beginPath(); |
| 50 } |
| 51 |
| 52 initTest(title) { |
| 53 resetCanvas(); |
| 54 ctx.font = "15px Courier"; |
| 55 ctx.textAlign = 'left'; |
| 56 ctx.fillStyle = "black"; |
| 57 ctx.fillText(title, 20, 20); |
| 58 } |
| 59 |
| 60 helloWorld() { |
| 61 initTest("Hello world"); |
| 62 ctx.font = "30px Courier"; |
| 63 ctx.strokeStyle = "#7F7F7F"; |
| 64 ctx.fillStyle = "#7F7F7F"; |
| 65 ctx.textAlign = "center"; |
| 66 ctx.lineWidth = 2; |
| 67 ctx.strokeText("Align Center", width / 2, height / 4); |
| 68 ctx.textAlign = "left"; |
| 69 ctx.fillText("Align Left", width / 2, height / 2); |
| 70 ctx.textAlign = "right"; |
| 71 ctx.fillText("Align Right", width / 2, 3 * height / 4); |
| 72 } |
| 73 |
| 74 blocks() { |
| 75 initTest("fillRect/strokeRect"); |
| 76 ctx.fillStyle = "#FF0000"; |
| 77 ctx.fillRect(width / 10, height / 10, width / 2, height / 25); |
| 78 ctx.fillStyle = "#00FF00"; |
| 79 ctx.fillRect(width / 4, height / 5, width / 20, height / 8); |
| 80 //ctx.fillStyle = "rgba(0,0,255,0.8)"; |
| 81 ctx.strokeStyle = "rgba(128,128,128, 0.5)"; |
| 82 //ctx.fillStyle = "#7F7F7F"; |
| 83 ctx.strokeRect(width / 5, height / 10, width / 2, height / 8); |
| 84 } |
| 85 |
| 86 square(left, top, width, height) { |
| 87 ctx.beginPath(); |
| 88 ctx.moveTo(left, top); |
| 89 ctx.lineTo(left + width, top); |
| 90 ctx.lineTo(left + width, top + height); |
| 91 ctx.lineTo(left, top + height); |
| 92 ctx.closePath(); //lineTo(left, top); |
| 93 } |
| 94 |
| 95 squares() { |
| 96 initTest("fill/stroke paths"); |
| 97 ctx.strokeStyle = "black"; |
| 98 ctx.fillStyle = "#FF0000"; |
| 99 ctx.lineWidth = 4; |
| 100 square(width / 10, height / 10, width / 2, height / 25); |
| 101 ctx.fill(); |
| 102 ctx.stroke(); |
| 103 ctx.fillStyle = "#00FF00"; |
| 104 square(width / 4, height / 5, width / 20, height / 8); |
| 105 ctx.fill(); |
| 106 ctx.stroke(); |
| 107 ctx.fillStyle = "rgba(128,128,128, 0.5)"; |
| 108 square(width / 5, height / 10, width / 2, height / 8); |
| 109 ctx.fill(); |
| 110 ctx.stroke(); |
| 111 } |
| 112 |
| 113 lineJoin() { |
| 114 initTest("Line joins"); |
| 115 ctx.strokeStyle = "black"; |
| 116 ctx.fillStyle = "#FF0000"; |
| 117 ctx.lineWidth = 8; |
| 118 ctx.lineJoin = "round"; |
| 119 square(width / 10, height / 10, width / 2, height / 25); |
| 120 ctx.stroke(); |
| 121 ctx.fillStyle = "#00FF00"; |
| 122 ctx.lineJoin = "bevel"; |
| 123 square(width / 4, height / 5, width / 20, height / 8); |
| 124 ctx.stroke(); |
| 125 ctx.fillStyle = "rgba(128,128,128, 0.5)"; |
| 126 ctx.lineJoin = "miter"; |
| 127 square(width / 5, height / 10, width / 2, height / 8); |
| 128 ctx.stroke(); |
| 129 } |
| 130 |
| 131 grid() { |
| 132 initTest("line strokes"); |
| 133 ctx.lineWidth = 1; |
| 134 for (var x = 0.5; x < width; x += 10) { |
| 135 ctx.moveTo(x, 0); |
| 136 ctx.lineTo(x, height); |
| 137 } |
| 138 for (var y = 0.5; y < height; y += 10) { |
| 139 ctx.moveTo(0, y); |
| 140 ctx.lineTo(width, y); |
| 141 } |
| 142 ctx.strokeStyle = "#eee"; |
| 143 ctx.stroke(); |
| 144 } |
| 145 |
| 146 line(x1, y1, x2, y2) { |
| 147 ctx.beginPath(); |
| 148 ctx.moveTo(x1, y1); |
| 149 ctx.lineTo(x2, y2); |
| 150 } |
| 151 |
| 152 strokeLines() { |
| 153 initTest("line caps"); |
| 154 ctx.lineWidth = height / 40; |
| 155 ctx.strokeStyle = '#0000ff'; |
| 156 // butt line cap (top line) |
| 157 line(width / 4, height / 4, 3 * width / 4, height / 4); |
| 158 ctx.lineCap = 'butt'; |
| 159 ctx.stroke(); |
| 160 |
| 161 // round line cap (middle line) |
| 162 line(width / 4, height / 2, 3 * width / 4, height / 2); |
| 163 ctx.lineCap = 'round'; |
| 164 ctx.stroke(); |
| 165 |
| 166 // square line cap (bottom line) |
| 167 line(width / 4, 3 * height / 4, 3 * width / 4, 3 * height / 4); |
| 168 ctx.lineCap = 'square'; |
| 169 ctx.stroke(); |
| 170 } |
| 171 |
| 172 colors() { |
| 173 initTest("Colors"); |
| 174 var colors = [ |
| 175 "maroon", |
| 176 "red", |
| 177 "orange", |
| 178 "yellow", |
| 179 "olive", |
| 180 "purple", |
| 181 "fuschia", |
| 182 "white", |
| 183 "lime", |
| 184 "green", |
| 185 "navy", |
| 186 "blue", |
| 187 "aqua", |
| 188 "teal", |
| 189 "silver", |
| 190 "gray", |
| 191 "black" |
| 192 ]; |
| 193 |
| 194 var i = 1; |
| 195 var yinc = height / (2 * colors.length + 1); |
| 196 |
| 197 ctx.textAlign = "center"; |
| 198 ctx.font = "${yinc}px Courier"; |
| 199 |
| 200 for (var color in colors) { |
| 201 ctx.fillStyle = color; |
| 202 ctx.fillRect(width / 4, i * 2 * yinc, width / 2, 3 * yinc / 2); |
| 203 ctx.fillStyle = (color == "gray") ? "white" : "gray"; |
| 204 ctx.fillText(color, width / 2, i * 2 * yinc + 7 * yinc / 8); |
| 205 ++i; |
| 206 } |
| 207 } |
| 208 |
| 209 smiley() { |
| 210 initTest("arcs"); |
| 211 ctx.translate(width / 2 - 80, height / 2 - 75); |
| 212 |
| 213 ctx.beginPath(); |
| 214 ctx.arc(100,80,75,0,Math.PI*2,true); |
| 215 ctx.fillStyle = "rgb(255,255,204)"; |
| 216 ctx.fill(); |
| 217 ctx.stroke(); |
| 218 |
| 219 ctx.fillStyle = "black"; |
| 220 ctx.beginPath(); |
| 221 ctx.arc(80,55,8,0,Math.PI*2,true); |
| 222 ctx.fill(); |
| 223 |
| 224 ctx.beginPath(); |
| 225 ctx.arc(120,55,8,0,Math.PI*2,true); |
| 226 ctx.fill(); |
| 227 |
| 228 ctx.beginPath(); |
| 229 ctx.arc(100,85,10,4,Math.PI*2,true); |
| 230 ctx.stroke(); |
| 231 |
| 232 ctx.beginPath(); |
| 233 ctx.arc(100,95,30,0,Math.PI,false); |
| 234 ctx.stroke(); |
| 235 |
| 236 ctx.setTransform(1, 0, 0, 1, 0, 0); |
| 237 } |
| 238 |
| 239 rot(txt1, [txt2, sx = 1.0, sy = 1.0]) { |
| 240 if (txt2 == null) txt2 = txt1; |
| 241 ctx.font = "50px sans serif"; |
| 242 ctx.translate(width / 2, height / 2); |
| 243 ctx.textAlign = "right"; |
| 244 ctx.fillStyle = "red"; |
| 245 ctx.fillText(txt1, 0, 0); |
| 246 ctx.rotate(Math.PI / 2); |
| 247 ctx.scale(sx, sy); |
| 248 ctx.fillStyle = "green"; |
| 249 ctx.fillText(txt2, 0, 0); |
| 250 ctx.scale(sx, sy); |
| 251 ctx.rotate(Math.PI / 2); |
| 252 ctx.fillStyle = "blue"; |
| 253 ctx.fillText(txt1, 0, 0); |
| 254 ctx.scale(sx, sy); |
| 255 ctx.rotate(Math.PI / 2); |
| 256 ctx.fillStyle = "yellow"; |
| 257 ctx.fillText(txt2, 0, 0); |
| 258 ctx.setTransform(1, 0, 0, 1, 0, 0); |
| 259 } |
| 260 |
| 261 rotate() { |
| 262 initTest("Rotation"); |
| 263 rot("Dart"); |
| 264 } |
| 265 |
| 266 alpha() { |
| 267 initTest("Global alpha"); |
| 268 ctx.fillStyle = "gray"; |
| 269 ctx.fillRect(0, 0, width, height); |
| 270 grid(); |
| 271 ctx.globalAlpha = 0.5; |
| 272 rot("Global", "Alpha"); |
| 273 ctx.globalAlpha = 1.0; |
| 274 } |
| 275 |
| 276 scale() { |
| 277 initTest("Scale"); |
| 278 rot("Scale", "Test", 0.8, 0.5); |
| 279 } |
| 280 |
| 281 curves() { |
| 282 initTest("Curves"); |
| 283 ctx.beginPath(); |
| 284 ctx.moveTo(188, 150); |
| 285 ctx.quadraticCurveTo(288, 0, 388, 150); |
| 286 ctx.lineWidth = 2; |
| 287 ctx.strokeStyle = 'red'; |
| 288 ctx.stroke(); |
| 289 ctx.beginPath(); |
| 290 ctx.moveTo(188, 130); |
| 291 ctx.bezierCurveTo(140, 10, 388, 10, 388, 170); |
| 292 ctx.lineWidth = 5; |
| 293 ctx.strokeStyle = 'blue'; |
| 294 ctx.stroke(); |
| 295 var x1, x2, y1, y2, ex, ey; |
| 296 ctx.beginPath(); |
| 297 x1 = width / 4; |
| 298 y1 = height / 2; |
| 299 x2 = width / 2; |
| 300 y2 = height / 4; |
| 301 ex = 3 * width / 4; |
| 302 ey = y1; |
| 303 ctx.moveTo(x1, x2); |
| 304 ctx.quadraticCurveTo(x2, y2, ex, ey); |
| 305 ctx.lineWidth = 10; |
| 306 ctx.strokeStyle = 'green'; |
| 307 ctx.stroke(); |
| 308 |
| 309 ctx.beginPath(); |
| 310 ctx.moveTo(188, 130); |
| 311 x1 = width / 8; |
| 312 x2 = 7 * width / 8; |
| 313 y1 = height / 50; |
| 314 y2 = y1; |
| 315 ex = x2; |
| 316 ey = height / 2; |
| 317 ctx.bezierCurveTo(x1, y1, x2, y2, ex, ey); |
| 318 ctx.lineWidth = 7; |
| 319 ctx.strokeStyle = 'black'; |
| 320 ctx.stroke(); |
| 321 |
| 322 // Draw a cloud |
| 323 ctx.beginPath(); |
| 324 var wscale = width / 578; |
| 325 var hscale = height / 800; |
| 326 ctx.translate(0, height / 2); |
| 327 ctx.moveTo(170 * wscale, 80 * hscale); |
| 328 ctx.bezierCurveTo(130 * wscale, 100 * hscale, |
| 329 130 * wscale, 150 * hscale, |
| 330 230 * wscale, 150 * hscale); |
| 331 ctx.bezierCurveTo(250 * wscale, 180 * hscale, |
| 332 320 * wscale, 180 * hscale, |
| 333 340 * wscale, 150 * hscale); |
| 334 ctx.bezierCurveTo(420 * wscale, 150 * hscale, |
| 335 420 * wscale, 120 * hscale, |
| 336 390 * wscale, 100 * hscale); |
| 337 ctx.bezierCurveTo(430 * wscale, 40 * hscale, |
| 338 370 * wscale, 30 * hscale, |
| 339 340 * wscale, 50 * hscale); |
| 340 ctx.bezierCurveTo(320 * wscale, 5 * hscale, |
| 341 250 * wscale, 20 * hscale, |
| 342 250 * wscale, 50 * hscale); |
| 343 ctx.bezierCurveTo(200 * wscale, 5 * hscale, |
| 344 150 * wscale, 20 * hscale, |
| 345 170 * wscale, 80 * hscale); |
| 346 ctx.closePath(); |
| 347 ctx.lineWidth = 5; |
| 348 ctx.fillStyle = 'gray'; |
| 349 ctx.fill(); |
| 350 } |
| 351 |
| 352 void shadows() { |
| 353 initTest("Shadows"); |
| 354 ctx.shadowBlur=20; |
| 355 ctx.shadowColor="black"; |
| 356 ctx.fillStyle="red"; |
| 357 var w = width / 2; |
| 358 if (w > height / 2) w = height / 2; |
| 359 ctx.fillRect(width / 2 - w / 2, height / 4 - w / 2, w, w); |
| 360 ctx.shadowOffsetX = 10; |
| 361 ctx.shadowOffsetY = 10; |
| 362 ctx.shadowColor="green"; |
| 363 ctx.fillRect(width / 2 - w / 2, 3 * height / 4 - w / 2, w, w); |
| 364 } |
| 365 |
| 366 void lineJoins() { |
| 367 initTest("Line joins"); |
| 368 ctx.lineWidth=10; |
| 369 ctx.lineJoin="miter"; |
| 370 ctx.moveTo(width / 2 - 25, height / 4 - 10); |
| 371 ctx.lineTo(width /2 + 25, height / 4); |
| 372 ctx.lineTo(width / 2 - 25, height / 4 + 10); |
| 373 ctx.stroke(); |
| 374 ctx.lineJoin="round"; |
| 375 ctx.moveTo(width / 2 - 25, height / 2 - 10); |
| 376 ctx.lineTo(width /2 + 25, height / 2); |
| 377 ctx.lineTo(width / 2 - 25, height / 2 + 10); |
| 378 ctx.stroke(); |
| 379 ctx.lineJoin="bevel"; |
| 380 ctx.moveTo(width / 2 - 25, 3 * height / 4 - 10); |
| 381 ctx.lineTo(width /2 + 25, 3 * height / 4); |
| 382 ctx.lineTo(width / 2 - 25, 3 * height / 4 + 10); |
| 383 ctx.stroke(); |
| 384 } |
| 385 |
| 386 void saveRestore() { |
| 387 initTest("Save/restore state"); |
| 388 ctx.font = "30px courier"; |
| 389 ctx.fillStyle = "red"; |
| 390 ctx.strokeStyle = "black"; |
| 391 ctx.shadowBlur = 5; |
| 392 ctx.shadowColor = "green"; |
| 393 ctx.lineWidth = 1; |
| 394 ctx.textAlign = "left"; |
| 395 ctx.rotate(Math.PI / 30); |
| 396 ctx.fillText("State 1", width /2, height / 6); |
| 397 ctx.strokeText("State 1", width /2, height / 6); |
| 398 ctx.save(); |
| 399 |
| 400 ctx.font = "40px sans serif"; |
| 401 ctx.fillStyle = "blue"; |
| 402 ctx.strokeStyle = "orange"; |
| 403 ctx.shadowBlur = 8; |
| 404 ctx.shadowOffsetX = 5; |
| 405 ctx.shadowColor = "black"; |
| 406 ctx.lineWidth = 2; |
| 407 ctx.textAlign = "right"; |
| 408 ctx.rotate(Math.PI / 30); |
| 409 ctx.fillText("State 2", width /2, 2 * height / 6); |
| 410 ctx.strokeText("State 2", width /2, 2 * height / 6); |
| 411 ctx.save(); |
| 412 |
| 413 ctx.font = "50px times roman"; |
| 414 ctx.fillStyle = "yellow"; |
| 415 ctx.strokeStyle = "gray"; |
| 416 ctx.shadowBlur = 8; |
| 417 ctx.shadowOffsetX = 5; |
| 418 ctx.shadowColor = "red"; |
| 419 ctx.lineWidth = 3; |
| 420 ctx.textAlign = "center"; |
| 421 ctx.rotate(-Math.PI / 15); |
| 422 ctx.fillText("State 3", width /2, 3 * height / 6); |
| 423 ctx.strokeText("State 3", width /2, 3 * height / 6); |
| 424 |
| 425 ctx.restore(); |
| 426 ctx.fillText("State 2", width /2, 4 * height / 6); |
| 427 ctx.strokeText("State 2", width /2, 4 * height / 6); |
| 428 |
| 429 ctx.restore(); |
| 430 ctx.fillText("State 1", width /2, 5 * height / 6); |
| 431 ctx.strokeText("State 1", width /2, 5 * height / 6); |
| 432 } |
| 433 |
| 434 void mirror() { |
| 435 initTest("Mirror"); |
| 436 // translate context to center of canvas |
| 437 ctx.translate(width / 2, height / 2); |
| 438 |
| 439 // flip context horizontally |
| 440 ctx.scale(-1, 1); |
| 441 |
| 442 ctx.font = '30pt Calibri'; |
| 443 ctx.textAlign = 'center'; |
| 444 ctx.fillStyle = 'blue'; |
| 445 ctx.fillText('Magic Mirror', 0, 0); |
| 446 } |
| 447 |
| 448 void oval() { |
| 449 initTest("Path - pop state - stroke"); |
| 450 var centerX = 0; |
| 451 var centerY = 0; |
| 452 var radius = 50; |
| 453 |
| 454 // save state |
| 455 ctx.save(); |
| 456 |
| 457 // translate context |
| 458 ctx.translate(width / 2, height / 2); |
| 459 |
| 460 // scale context horizontally |
| 461 ctx.scale(2, 1); |
| 462 |
| 463 // draw circle which will be stretched into an oval |
| 464 ctx.beginPath(); |
| 465 ctx.arc(centerX, centerY, radius, 0, 2 * Math.PI, false); |
| 466 |
| 467 // restore to original state |
| 468 ctx.restore(); |
| 469 |
| 470 // apply styling |
| 471 ctx.fillStyle = '#8ED6FF'; |
| 472 ctx.fill(); |
| 473 ctx.lineWidth = 5; |
| 474 ctx.strokeStyle = 'black'; |
| 475 ctx.stroke(); |
| 476 } |
| 477 |
| 478 void lineDash() { |
| 479 initTest("Line dash"); |
| 480 ctx.setLineDash([ 5, 8, 3 ]); |
| 481 ctx.strokeStyle = "#FF0000"; |
| 482 ctx.strokeRect(width / 10, height / 10, width / 2, height / 25); |
| 483 ctx.lineDashOffset = 1; |
| 484 ctx.strokeStyle = "#00FF00"; |
| 485 ctx.strokeRect(width / 4, height / 5, width / 20, height / 8); |
| 486 ctx.setLineDash([]); |
| 487 ctx.strokeStyle = "#0000FF"; |
| 488 ctx.strokeStyle = "rgba(128,128,128, 0.5)"; |
| 489 ctx.strokeRect(width / 5, height / 10, width / 2, height / 8); |
| 490 log("Width = $width"); |
| 491 } |
| 492 |
| 493 // TODO(gram) - apparently a canvas can have only one op in its lifetime, |
| 494 // so this test won't work until we can use off-screen canvases. |
| 495 void compositeOp() { |
| 496 initTest("Composition"); |
| 497 var num = 0; |
| 498 ctx.font = '10pt Verdana'; |
| 499 var numPerRow = width ~/ 95; |
| 500 log("Width = $width, numPerRow = $numPerRow\n"); |
| 501 for (var mode in [ 'source-atop', 'source-in', |
| 502 'source-out', 'source-over', |
| 503 'destination-atop', 'destination-in', |
| 504 'destination-out', 'destination-over', |
| 505 'lighter', 'darker', |
| 506 'xor', 'copy']) { |
| 507 var col = num % numPerRow; |
| 508 var row = num ~/ numPerRow; |
| 509 ctx.globalCompositeOperation = mode; |
| 510 ctx.translate(95 * col, 100 * row); |
| 511 log("Doing $mode at row $row, col $col\n"); |
| 512 ctx.beginPath(); |
| 513 ctx.rect(0, 0, 55, 55); |
| 514 ctx.fillStyle = 'blue'; |
| 515 ctx.fill(); |
| 516 ctx.beginPath(); |
| 517 ctx.arc(50, 50, 35, 0, 2 * Math.PI, false); |
| 518 ctx.fillStyle = 'red'; |
| 519 ctx.fill(); |
| 520 ctx.fillStyle = 'black'; |
| 521 ctx.fillText(mode, 0, 100); |
| 522 ctx.setTransform(1, 0, 0, 1, 0, 0); |
| 523 ++num; |
| 524 } |
| 525 } |
| 526 |
| 527 void loadImage() { |
| 528 initTest("Image loading"); |
| 529 var imageObj = new ImageElement(); |
| 530 imageObj.on.load.add((e) { |
| 531 ctx.drawImage(imageObj, 69, 50); |
| 532 }); |
| 533 imageObj.src = 'http://www.html5canvastutorials.com/demos/assets/darth-vader.b
mp'; |
| 534 } |
| 535 |
| 536 void clip() { |
| 537 initTest("Clipping"); |
| 538 var x = width / 2; |
| 539 var y = height / 2; |
| 540 var radius = height / 4; |
| 541 var offset = 2 * radius / 3; |
| 542 |
| 543 ctx.save(); |
| 544 ctx.beginPath(); |
| 545 ctx.arc(x, y, radius, 0, 2 * Math.PI, false); |
| 546 ctx.clip(); |
| 547 |
| 548 // draw blue circle inside clipping region |
| 549 ctx.beginPath(); |
| 550 ctx.arc(x - offset, y - offset, radius, 0, 2 * Math.PI, false); |
| 551 ctx.fillStyle = 'blue'; |
| 552 ctx.fill(); |
| 553 |
| 554 // draw yellow circle inside clipping region |
| 555 ctx.beginPath(); |
| 556 ctx.arc(x + offset, y, radius, 0, 2 * Math.PI, false); |
| 557 ctx.fillStyle = 'yellow'; |
| 558 ctx.fill(); |
| 559 |
| 560 // draw red circle inside clipping region |
| 561 ctx.beginPath(); |
| 562 ctx.arc(x, y + offset, radius, 0, 2 * Math.PI, false); |
| 563 ctx.fillStyle = 'red'; |
| 564 ctx.fill(); |
| 565 |
| 566 // Restore the canvas context to its original state |
| 567 // before we defined the clipping region |
| 568 ctx.restore(); |
| 569 ctx.beginPath(); |
| 570 ctx.arc(x, y, radius, 0, 2 * Math.PI, false); |
| 571 ctx.lineWidth = 10; |
| 572 ctx.strokeStyle = 'blue'; |
| 573 ctx.stroke(); |
| 574 } |
| 575 |
| 576 void shear() { |
| 577 initTest("Transform"); |
| 578 var rectWidth = width / 4; |
| 579 var rectHeight = height / 8; |
| 580 |
| 581 // shear matrix: |
| 582 // 1 sx 0 |
| 583 // sy 1 0 |
| 584 // 0 0 1 |
| 585 |
| 586 var sx = 0.75; |
| 587 // .75 horizontal shear |
| 588 var sy = 0; |
| 589 // no vertical shear |
| 590 |
| 591 // translate context to center of canvas |
| 592 ctx.translate(width / 2, height / 2); |
| 593 |
| 594 // apply custom transform |
| 595 ctx.transform(1, sy, sx, 1, 0, 0); |
| 596 |
| 597 ctx.fillStyle = 'blue'; |
| 598 ctx.fillRect(-rectWidth / 2, rectHeight / -2, rectWidth, rectHeight); |
| 599 } |
| 600 |
| 601 int numtests = 21; |
| 602 int testnum = numtests - 1; // Start with latest. |
| 603 |
| 604 void update() { |
| 605 if (!isDirty) return; |
| 606 switch(testnum) { |
| 607 case 0: |
| 608 helloWorld(); |
| 609 break; |
| 610 case 1: |
| 611 smiley(); |
| 612 break; |
| 613 case 2: |
| 614 blocks(); |
| 615 break; |
| 616 case 3: |
| 617 squares(); |
| 618 break; |
| 619 case 4: |
| 620 grid(); |
| 621 break; |
| 622 case 5: |
| 623 strokeLines(); |
| 624 break; |
| 625 case 6: |
| 626 lineJoin(); |
| 627 break; |
| 628 case 7: |
| 629 colors(); |
| 630 break; |
| 631 case 8: |
| 632 rotate(); |
| 633 break; |
| 634 case 9: |
| 635 alpha(); |
| 636 break; |
| 637 case 10: |
| 638 scale(); |
| 639 break; |
| 640 case 11: |
| 641 curves(); |
| 642 break; |
| 643 case 12: |
| 644 shadows(); |
| 645 break; |
| 646 case 13: |
| 647 lineJoins(); |
| 648 break; |
| 649 case 14: |
| 650 saveRestore(); |
| 651 break; |
| 652 case 15: |
| 653 mirror(); |
| 654 break; |
| 655 case 16: |
| 656 oval(); |
| 657 break; |
| 658 case 17: |
| 659 lineDash(); |
| 660 break; |
| 661 case 18: |
| 662 loadImage(); |
| 663 break; |
| 664 case 19: |
| 665 clip(); |
| 666 break; |
| 667 case 20: |
| 668 shear(); |
| 669 break; |
| 670 default: |
| 671 testnum = 0; |
| 672 update(); |
| 673 break; |
| 674 } |
| 675 isDirty = false; |
| 676 } |
| 677 |
| 678 /* |
| 679 TODO(gram): below are the current entry points for input events for the |
| 680 native code version. We need to integrate these somehow with the WebGL |
| 681 version: |
| 682 */ |
| 683 onMotionDown(num when, num x, num y) { |
| 684 ++testnum; |
| 685 isDirty = true; |
| 686 log("Marking dirty"); |
| 687 } |
| 688 onMotionUp(num when, num x, num y) {} |
| 689 onMotionMove(num when, num x, num y) {} |
| 690 onMotionCancel(num when, num x, num y) {} |
| 691 onMotionOutside(num when, num x, num y) {} |
| 692 onMotionPointerDown(num when, num x, num y) { |
| 693 ++testnum; |
| 694 isDirty = true; |
| 695 log("Marking dirty"); |
| 696 } |
| 697 |
| 698 onMotionPointerUp(num when, num x, num y) {} |
| 699 |
| 700 onKeyDown(num when, int flags, int keycode, int metastate, int repeat) { |
| 701 ++testnum; |
| 702 isDirty = true; |
| 703 log("Marking dirty"); |
| 704 } |
| 705 |
| 706 onKeyUp(num when, int flags, int keycode, int metastate, int repeat) {} |
| 707 |
| 708 onKeyMultiple(num when, int flags, int keycode, int metastate, int repeat) { |
| 709 } |
| 710 |
| 711 |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 12186002:
Canvas API. There are still a number of things to do: (Closed)
Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/