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| 1 <!DOCTYPE html> |
| 2 <meta charset=utf-8> |
| 3 <title>Tests for calculation of the transformed distance when computing an effec
t value</title> |
| 4 <link rel="help" href="https://w3c.github.io/web-animations/#the-effect-value-of
-a-keyframe-animation-effect"> |
| 5 <script src="/resources/testharness.js"></script> |
| 6 <script src="/resources/testharnessreport.js"></script> |
| 7 <script src="../../testcommon.js"></script> |
| 8 <script src="../../resources/easing-tests.js"></script> |
| 9 <body> |
| 10 <div id="log"></div> |
| 11 <div id="target"></div> |
| 12 <script> |
| 13 'use strict'; |
| 14 |
| 15 // Test that applying easing to keyframes is applied as expected |
| 16 |
| 17 gEasingTests.forEach(params => { |
| 18 test(function(t) { |
| 19 const target = createDiv(t); |
| 20 const anim = target.animate([ { width: '0px' }, |
| 21 // We put the easing on the second keyframe |
| 22 // so we can test that it is only applied |
| 23 // to the specified keyframe. |
| 24 { width: '100px', easing: params.easing }, |
| 25 { width: '200px' } ], |
| 26 { duration: 2000, |
| 27 fill: 'forwards' }); |
| 28 |
| 29 [ 0, 999, 1000, 1100, 1500, 2000 ].forEach(sampleTime => { |
| 30 anim.currentTime = sampleTime; |
| 31 |
| 32 const portion = (sampleTime - 1000) / 1000; |
| 33 const expectedWidth = sampleTime < 1000 |
| 34 ? sampleTime / 10 // first segment is linear |
| 35 : 100 + params.easingFunction(portion) * 100; |
| 36 assert_approx_equals(parseFloat(getComputedStyle(target).width), |
| 37 expectedWidth, |
| 38 0.01, |
| 39 'The width should be approximately ' + |
| 40 `${expectedWidth} at ${sampleTime}ms`); |
| 41 }); |
| 42 }, `A ${params.desc} on a keyframe affects the resulting style`); |
| 43 }); |
| 44 |
| 45 // Test that a linear-equivalent cubic-bezier easing applied to a keyframe does |
| 46 // not alter (including clamping) the result. |
| 47 |
| 48 gEasingTests.forEach(params => { |
| 49 const linearEquivalentEasings = [ 'cubic-bezier(0, 0, 0, 0)', |
| 50 'cubic-bezier(1, 1, 1, 1)' ]; |
| 51 test(function(t) { |
| 52 linearEquivalentEasings.forEach(linearEquivalentEasing => { |
| 53 const timing = { duration: 1000, |
| 54 fill: 'forwards', |
| 55 easing: params.easing }; |
| 56 |
| 57 const linearTarget = createDiv(t); |
| 58 const linearAnim = linearTarget.animate([ { width: '0px' }, |
| 59 { width: '100px' } ], |
| 60 timing); |
| 61 |
| 62 const equivalentTarget = createDiv(t); |
| 63 const equivalentAnim = |
| 64 equivalentTarget.animate([ { width: '0px', |
| 65 easing: linearEquivalentEasing }, |
| 66 { width: '100px' } ], |
| 67 timing); |
| 68 |
| 69 [ 0, 250, 500, 750, 1000 ].forEach(sampleTime => { |
| 70 linearAnim.currentTime = sampleTime; |
| 71 equivalentAnim.currentTime = sampleTime; |
| 72 |
| 73 assert_equals(getComputedStyle(linearTarget).width, |
| 74 getComputedStyle(equivalentTarget).width, |
| 75 `The 'width' of the animated elements should be equal ` + |
| 76 `at ${sampleTime}ms`); |
| 77 }); |
| 78 }); |
| 79 }, 'Linear-equivalent cubic-bezier keyframe easing applied to an effect ' + |
| 80 `with a ${params.desc} does not alter the result`); |
| 81 }); |
| 82 |
| 83 // Test that different easing functions correctly handle inputs outside the |
| 84 // range [0, 1]. This only occurs when we have an easing specified on the |
| 85 // effect that produces a value outside [0, 1] which we then pass to an easing |
| 86 // on a keyframe. |
| 87 |
| 88 function assert_style_left_at(animation, time, easingFunction) { |
| 89 animation.currentTime = time; |
| 90 var portion = time / animation.effect.timing.duration; |
| 91 assert_approx_equals(pxToNum(getComputedStyle(animation.effect.target).left), |
| 92 easingFunction(portion) * 100, |
| 93 0.01, |
| 94 'The left of the animation should be approximately ' + |
| 95 easingFunction(portion) * 100 + ' at ' + time + 'ms'); |
| 96 } |
| 97 |
| 98 test(function(t) { |
| 99 var target = createDiv(t); |
| 100 target.style.position = 'absolute'; |
| 101 var anim = target.animate([ { left: '0px', easing: 'step-start' }, |
| 102 { left: '100px' } ], |
| 103 { duration: 1000, |
| 104 fill: 'forwards', |
| 105 easing: 'cubic-bezier(0, 1.5, 1, 1.5)' }); |
| 106 |
| 107 // The bezier function produces values greater than 1 (but always less than 2) |
| 108 // in (0.23368794, 1) |
| 109 anim.currentTime = 0; |
| 110 assert_equals(getComputedStyle(target).left, '100px'); |
| 111 anim.currentTime = 230; |
| 112 assert_equals(getComputedStyle(target).left, '100px'); |
| 113 anim.currentTime = 250; |
| 114 assert_equals(getComputedStyle(target).left, '200px'); |
| 115 anim.currentTime = 1000; |
| 116 assert_equals(getComputedStyle(target).left, '100px'); |
| 117 }, 'step-start easing with input progress greater than 1'); |
| 118 |
| 119 test(function(t) { |
| 120 var target = createDiv(t); |
| 121 target.style.position = 'absolute'; |
| 122 var anim = target.animate([ { left: '0px', easing: 'step-end' }, |
| 123 { left: '100px' } ], |
| 124 { duration: 1000, |
| 125 fill: 'forwards', |
| 126 easing: 'cubic-bezier(0, 1.5, 1, 1.5)' }); |
| 127 |
| 128 // The bezier function produces values greater than 1 (but always less than 2) |
| 129 // in (0.23368794, 1) |
| 130 anim.currentTime = 0; |
| 131 assert_equals(getComputedStyle(target).left, '0px'); |
| 132 anim.currentTime = 230; |
| 133 assert_equals(getComputedStyle(target).left, '0px'); |
| 134 anim.currentTime = 250; |
| 135 assert_equals(getComputedStyle(target).left, '100px'); |
| 136 anim.currentTime = 1000; |
| 137 assert_equals(getComputedStyle(target).left, '100px'); |
| 138 }, 'step-end easing with input progress greater than 1'); |
| 139 |
| 140 test(function(t) { |
| 141 var target = createDiv(t); |
| 142 target.style.position = 'absolute'; |
| 143 var anim = target.animate([ { left: '0px', easing: 'step-end' }, |
| 144 { left: '100px' } ], |
| 145 { duration: 1000, |
| 146 fill: 'forwards', |
| 147 easing: 'cubic-bezier(0, 3, 1, 3)' }); |
| 148 |
| 149 // The bezier function produces values greater than 2 (but always less than 3) |
| 150 // in the range (~0.245, ~0.882) |
| 151 anim.currentTime = 0; |
| 152 assert_equals(getComputedStyle(target).left, '0px'); |
| 153 anim.currentTime = 500; |
| 154 assert_equals(getComputedStyle(target).left, '200px'); |
| 155 anim.currentTime = 900; |
| 156 assert_equals(getComputedStyle(target).left, '100px'); |
| 157 }, 'step-end easing with input progress greater than 2'); |
| 158 |
| 159 test(function(t) { |
| 160 var target = createDiv(t); |
| 161 target.style.position = 'absolute'; |
| 162 var anim = target.animate([ { left: '0px', easing: 'step-start' }, |
| 163 { left: '100px' } ], |
| 164 { duration: 1000, |
| 165 fill: 'forwards', |
| 166 easing: 'cubic-bezier(0, -0.5, 1, -0.5)' }); |
| 167 |
| 168 // The bezier function produces negative values (but always greater than -1) |
| 169 // in (0, 0.766312060) |
| 170 anim.currentTime = 0; |
| 171 assert_equals(getComputedStyle(target).left, '100px'); |
| 172 anim.currentTime = 750; |
| 173 assert_equals(getComputedStyle(target).left, '0px'); |
| 174 anim.currentTime = 800; |
| 175 assert_equals(getComputedStyle(target).left, '100px'); |
| 176 anim.currentTime = 1000; |
| 177 assert_equals(getComputedStyle(target).left, '100px'); |
| 178 }, 'step-start easing with input progress less than 0'); |
| 179 |
| 180 test(function(t) { |
| 181 var target = createDiv(t); |
| 182 target.style.position = 'absolute'; |
| 183 var anim = target.animate([ { left: '0px', easing: 'step-start' }, |
| 184 { left: '100px' } ], |
| 185 { duration: 1000, |
| 186 fill: 'forwards', |
| 187 easing: 'cubic-bezier(0, -2, 1, -2)' }); |
| 188 |
| 189 // The bezier function produces values less than -1 (but always greater than |
| 190 // -2) in the range (~0.118, ~0.755) |
| 191 anim.currentTime = 0; |
| 192 assert_equals(getComputedStyle(target).left, '100px'); |
| 193 anim.currentTime = 100; |
| 194 assert_equals(getComputedStyle(target).left, '0px'); |
| 195 anim.currentTime = 500; |
| 196 assert_equals(getComputedStyle(target).left, '-100px'); |
| 197 anim.currentTime = 1000; |
| 198 assert_equals(getComputedStyle(target).left, '100px'); |
| 199 }, 'step-start easing with input progress less than -1'); |
| 200 |
| 201 test(function(t) { |
| 202 var target = createDiv(t); |
| 203 target.style.position = 'absolute'; |
| 204 var anim = target.animate([ { left: '0px', easing: 'step-end' }, |
| 205 { left: '100px' } ], |
| 206 { duration: 1000, |
| 207 fill: 'forwards', |
| 208 easing: 'cubic-bezier(0, -0.5, 1, -0.5)' }); |
| 209 |
| 210 // The bezier function produces negative values (but always greater than -1) |
| 211 // in (0, 0.766312060) |
| 212 anim.currentTime = 0; |
| 213 assert_equals(getComputedStyle(target).left, '0px'); |
| 214 anim.currentTime = 750; |
| 215 assert_equals(getComputedStyle(target).left, '-100px'); |
| 216 anim.currentTime = 800; |
| 217 assert_equals(getComputedStyle(target).left, '0px'); |
| 218 anim.currentTime = 1000; |
| 219 assert_equals(getComputedStyle(target).left, '100px'); |
| 220 }, 'step-end easing with input progress less than 0'); |
| 221 |
| 222 test(function(t) { |
| 223 var target = createDiv(t); |
| 224 target.style.position = 'absolute'; |
| 225 var anim = target.animate( |
| 226 // http://cubic-bezier.com/#.5,1,.5,0 |
| 227 [ { left: '0px', easing: 'cubic-bezier(0.5, 1, 0.5, 0)' }, |
| 228 { left: '100px' } ], |
| 229 { duration: 1000, |
| 230 fill: 'forwards', |
| 231 easing: 'cubic-bezier(0, 1.5, 1, 1.5)' }); |
| 232 var keyframeEasing = function(x) { |
| 233 assert_greater_than_equal(x, 0.0, |
| 234 'This function should be called in [0, 1.0] range'); |
| 235 assert_less_than_equal(x, 1.0, |
| 236 'This function should be called in [0, 1.0] range'); |
| 237 return cubicBezier(0.5, 1, 0.5, 0)(x); |
| 238 } |
| 239 var keyframeEasingExtrapolated = function(x) { |
| 240 assert_greater_than(x, 1.0, |
| 241 'This function should be called in (1.0, infinity) range'); |
| 242 // p3x + (p2y - p3y) / (p2x - p3x) * (x - p3x) |
| 243 return 1.0 + (0 - 1) / (0.5 - 1) * (x - 1.0); |
| 244 } |
| 245 var effectEasing = function(x) { |
| 246 return cubicBezier(0, 1.5, 1, 1.5)(x); |
| 247 } |
| 248 |
| 249 // The effect-easing produces values greater than 1 in (0.23368794, 1) |
| 250 assert_style_left_at(anim, 0, function(x) { |
| 251 return keyframeEasing(effectEasing(x)); |
| 252 }); |
| 253 assert_style_left_at(anim, 230, function(x) { |
| 254 return keyframeEasing(effectEasing(x)); |
| 255 }); |
| 256 assert_style_left_at(anim, 240, function(x) { |
| 257 return keyframeEasingExtrapolated(effectEasing(x)); |
| 258 }); |
| 259 // Near the extreme point of the effect-easing function |
| 260 assert_style_left_at(anim, 700, function(x) { |
| 261 return keyframeEasingExtrapolated(effectEasing(x)); |
| 262 }); |
| 263 assert_style_left_at(anim, 990, function(x) { |
| 264 return keyframeEasingExtrapolated(effectEasing(x)); |
| 265 }); |
| 266 assert_style_left_at(anim, 1000, function(x) { |
| 267 return keyframeEasing(effectEasing(x)); |
| 268 }); |
| 269 }, 'cubic-bezier easing with input progress greater than 1'); |
| 270 |
| 271 test(function(t) { |
| 272 var target = createDiv(t); |
| 273 target.style.position = 'absolute'; |
| 274 var anim = target.animate( |
| 275 // http://cubic-bezier.com/#0,1.5,1,1.5 |
| 276 [ { left: '0px', easing: 'cubic-bezier(0, 1.5, 1, 1.5)' }, |
| 277 { left: '100px' } ], |
| 278 { duration: 1000, |
| 279 fill: 'forwards', |
| 280 easing: 'cubic-bezier(0, 1.5, 1, 1.5)' }); |
| 281 var easing = function(x) { |
| 282 assert_greater_than_equal(x, 0.0, |
| 283 'This function should be called in [0, 1.0] range'); |
| 284 assert_less_than_equal(x, 1.0, |
| 285 'This function should be called in [0, 1.0] range'); |
| 286 return cubicBezier(0, 1.5, 1, 1.5)(x); |
| 287 } |
| 288 var easingExtrapolated = function(x) { |
| 289 assert_greater_than(x, 1.0, |
| 290 'This function should be called in negative range'); |
| 291 // For cubic-bezier(0, 1.5, 1, 1.5), the tangent at the |
| 292 // endpoint (x = 1.0) is infinity so we should just return 1.0. |
| 293 return 1.0; |
| 294 } |
| 295 |
| 296 // The effect-easing produces values greater than 1 in (0.23368794, 1) |
| 297 assert_style_left_at(anim, 0, function(x) { |
| 298 return easing(easing(x)) |
| 299 }); |
| 300 assert_style_left_at(anim, 230, function(x) { |
| 301 return easing(easing(x)) |
| 302 }); |
| 303 assert_style_left_at(anim, 240, function(x) { |
| 304 return easingExtrapolated(easing(x)); |
| 305 }); |
| 306 // Near the extreme point of the effect-easing function |
| 307 assert_style_left_at(anim, 700, function(x) { |
| 308 return easingExtrapolated(easing(x)); |
| 309 }); |
| 310 assert_style_left_at(anim, 990, function(x) { |
| 311 return easingExtrapolated(easing(x)); |
| 312 }); |
| 313 assert_style_left_at(anim, 1000, function(x) { |
| 314 return easing(easing(x)) |
| 315 }); |
| 316 }, 'cubic-bezier easing with input progress greater than 1 and where the ' + |
| 317 'tangent on the upper boundary is infinity'); |
| 318 |
| 319 test(function(t) { |
| 320 var target = createDiv(t); |
| 321 target.style.position = 'absolute'; |
| 322 var anim = target.animate( |
| 323 // http://cubic-bezier.com/#.5,1,.5,0 |
| 324 [ { left: '0px', easing: 'cubic-bezier(0.5, 1, 0.5, 0)' }, |
| 325 { left: '100px' } ], |
| 326 { duration: 1000, |
| 327 fill: 'forwards', |
| 328 easing: 'cubic-bezier(0, -0.5, 1, -0.5)' }); |
| 329 var keyframeEasing = function(x) { |
| 330 assert_greater_than_equal(x, 0.0, |
| 331 'This function should be called in [0, 1.0] range'); |
| 332 assert_less_than_equal(x, 1.0, |
| 333 'This function should be called in [0, 1.0] range'); |
| 334 return cubicBezier(0.5, 1, 0.5, 0)(x); |
| 335 } |
| 336 var keyframeEasingExtrapolated = function(x) { |
| 337 assert_less_than(x, 0.0, |
| 338 'This function should be called in negative range'); |
| 339 // p0x + (p1y - p0y) / (p1x - p0x) * (x - p0x) |
| 340 return (1 / 0.5) * x; |
| 341 } |
| 342 var effectEasing = function(x) { |
| 343 return cubicBezier(0, -0.5, 1, -0.5)(x); |
| 344 } |
| 345 |
| 346 // The effect-easing produces negative values in (0, 0.766312060) |
| 347 assert_style_left_at(anim, 0, function(x) { |
| 348 return keyframeEasing(effectEasing(x)); |
| 349 }); |
| 350 assert_style_left_at(anim, 10, function(x) { |
| 351 return keyframeEasingExtrapolated(effectEasing(x)); |
| 352 }); |
| 353 // Near the extreme point of the effect-easing function |
| 354 assert_style_left_at(anim, 300, function(x) { |
| 355 return keyframeEasingExtrapolated(effectEasing(x)); |
| 356 }); |
| 357 assert_style_left_at(anim, 750, function(x) { |
| 358 return keyframeEasingExtrapolated(effectEasing(x)); |
| 359 }); |
| 360 assert_style_left_at(anim, 770, function(x) { |
| 361 return keyframeEasing(effectEasing(x)); |
| 362 }); |
| 363 assert_style_left_at(anim, 1000, function(x) { |
| 364 return keyframeEasing(effectEasing(x)); |
| 365 }); |
| 366 }, 'cubic-bezier easing with input progress less than 0'); |
| 367 |
| 368 test(function(t) { |
| 369 var target = createDiv(t); |
| 370 target.style.position = 'absolute'; |
| 371 var anim = target.animate( |
| 372 // http://cubic-bezier.com/#0,-0.5,1,-0.5 |
| 373 [ { left: '0px', easing: 'cubic-bezier(0, -0.5, 1, -0.5)' }, |
| 374 { left: '100px' } ], |
| 375 { duration: 1000, |
| 376 fill: 'forwards', |
| 377 easing: 'cubic-bezier(0, -0.5, 1, -0.5)' }); |
| 378 var easing = function(x) { |
| 379 assert_greater_than_equal(x, 0.0, |
| 380 'This function should be called in [0, 1.0] range'); |
| 381 assert_less_than_equal(x, 1.0, |
| 382 'This function should be called in [0, 1.0] range'); |
| 383 return cubicBezier(0, -0.5, 1, -0.5)(x); |
| 384 } |
| 385 var easingExtrapolated = function(x) { |
| 386 assert_less_than(x, 0.0, |
| 387 'This function should be called in negative range'); |
| 388 // For cubic-bezier(0, -0.5, 1, -0.5), the tangent at the |
| 389 // endpoint (x = 0.0) is infinity so we should just return 0.0. |
| 390 return 0.0; |
| 391 } |
| 392 |
| 393 // The effect-easing produces negative values in (0, 0.766312060) |
| 394 assert_style_left_at(anim, 0, function(x) { |
| 395 return easing(easing(x)) |
| 396 }); |
| 397 assert_style_left_at(anim, 10, function(x) { |
| 398 return easingExtrapolated(easing(x)); |
| 399 }); |
| 400 // Near the extreme point of the effect-easing function |
| 401 assert_style_left_at(anim, 300, function(x) { |
| 402 return easingExtrapolated(easing(x)); |
| 403 }); |
| 404 assert_style_left_at(anim, 750, function(x) { |
| 405 return easingExtrapolated(easing(x)); |
| 406 }); |
| 407 assert_style_left_at(anim, 770, function(x) { |
| 408 return easing(easing(x)) |
| 409 }); |
| 410 assert_style_left_at(anim, 1000, function(x) { |
| 411 return easing(easing(x)) |
| 412 }); |
| 413 }, 'cubic-bezier easing with input progress less than 0 and where the ' + |
| 414 'tangent on the lower boundary is infinity'); |
| 415 |
| 416 </script> |
| 417 </body> |
| OLD | NEW |
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Chromium Code Reviews
Issue 2695813009:
Import wpt@503f5b5f78ec4e87d144f78609f363f0ed0ea8db (Closed)
