src/cc/animation/keyframed_animation_curve_unittest.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/animation/keyframed_animation_curve.h"
   6
   7 #include "cc/animation/transform_operations.h"
   8 #include "testing/gmock/include/gmock/gmock.h"
   9 #include "testing/gtest/include/gtest/gtest.h"
  10 #include "ui/gfx/animation/tween.h"
  11 #include "ui/gfx/box_f.h"
  12 #include "ui/gfx/test/gfx_util.h"
  13
  14 namespace cc {
  15 namespace {
  16
  17 void ExpectTranslateX(SkMScalar translate_x, const gfx::Transform& transform) {
  18   EXPECT_FLOAT_EQ(translate_x, transform.matrix().get(0, 3));
  19 }
  20
  21 void ExpectBrightness(double brightness, const FilterOperations& filter) {
  22   EXPECT_EQ(1u, filter.size());
  23   EXPECT_EQ(FilterOperation::BRIGHTNESS, filter.at(0).type());
  24   EXPECT_FLOAT_EQ(brightness, filter.at(0).amount());
  25 }
  26
  27 // Tests that a color animation with one keyframe works as expected.
  28 TEST(KeyframedAnimationCurveTest, OneColorKeyFrame) {
  29   SkColor color = SkColorSetARGB(255, 255, 255, 255);
  30   scoped_ptr<KeyframedColorAnimationCurve> curve(
  31       KeyframedColorAnimationCurve::Create());
  32   curve->AddKeyframe(
  33       ColorKeyframe::Create(0.0, color, scoped_ptr<TimingFunction>()));
  34
  35   EXPECT_SKCOLOR_EQ(color, curve->GetValue(-1.f));
  36   EXPECT_SKCOLOR_EQ(color, curve->GetValue(0.f));
  37   EXPECT_SKCOLOR_EQ(color, curve->GetValue(0.5f));
  38   EXPECT_SKCOLOR_EQ(color, curve->GetValue(1.f));
  39   EXPECT_SKCOLOR_EQ(color, curve->GetValue(2.f));
  40 }
  41
  42 // Tests that a color animation with two keyframes works as expected.
  43 TEST(KeyframedAnimationCurveTest, TwoColorKeyFrame) {
  44   SkColor color_a = SkColorSetARGB(255, 255, 0, 0);
  45   SkColor color_b = SkColorSetARGB(255, 0, 255, 0);
  46   SkColor color_midpoint = gfx::Tween::ColorValueBetween(0.5, color_a, color_b);
  47   scoped_ptr<KeyframedColorAnimationCurve> curve(
  48       KeyframedColorAnimationCurve::Create());
  49   curve->AddKeyframe(
  50       ColorKeyframe::Create(0.0, color_a, scoped_ptr<TimingFunction>()));
  51   curve->AddKeyframe(
  52       ColorKeyframe::Create(1.0, color_b, scoped_ptr<TimingFunction>()));
  53
  54   EXPECT_SKCOLOR_EQ(color_a, curve->GetValue(-1.f));
  55   EXPECT_SKCOLOR_EQ(color_a, curve->GetValue(0.f));
  56   EXPECT_SKCOLOR_EQ(color_midpoint, curve->GetValue(0.5f));
  57   EXPECT_SKCOLOR_EQ(color_b, curve->GetValue(1.f));
  58   EXPECT_SKCOLOR_EQ(color_b, curve->GetValue(2.f));
  59 }
  60
  61 // Tests that a color animation with three keyframes works as expected.
  62 TEST(KeyframedAnimationCurveTest, ThreeColorKeyFrame) {
  63   SkColor color_a = SkColorSetARGB(255, 255, 0, 0);
  64   SkColor color_b = SkColorSetARGB(255, 0, 255, 0);
  65   SkColor color_c = SkColorSetARGB(255, 0, 0, 255);
  66   SkColor color_midpoint1 =
  67       gfx::Tween::ColorValueBetween(0.5, color_a, color_b);
  68   SkColor color_midpoint2 =
  69       gfx::Tween::ColorValueBetween(0.5, color_b, color_c);
  70   scoped_ptr<KeyframedColorAnimationCurve> curve(
  71       KeyframedColorAnimationCurve::Create());
  72   curve->AddKeyframe(
  73       ColorKeyframe::Create(0.0, color_a, scoped_ptr<TimingFunction>()));
  74   curve->AddKeyframe(
  75       ColorKeyframe::Create(1.0, color_b, scoped_ptr<TimingFunction>()));
  76   curve->AddKeyframe(
  77       ColorKeyframe::Create(2.0, color_c, scoped_ptr<TimingFunction>()));
  78
  79   EXPECT_SKCOLOR_EQ(color_a, curve->GetValue(-1.f));
  80   EXPECT_SKCOLOR_EQ(color_a, curve->GetValue(0.f));
  81   EXPECT_SKCOLOR_EQ(color_midpoint1, curve->GetValue(0.5f));
  82   EXPECT_SKCOLOR_EQ(color_b, curve->GetValue(1.f));
  83   EXPECT_SKCOLOR_EQ(color_midpoint2, curve->GetValue(1.5f));
  84   EXPECT_SKCOLOR_EQ(color_c, curve->GetValue(2.f));
  85   EXPECT_SKCOLOR_EQ(color_c, curve->GetValue(3.f));
  86 }
  87
  88 // Tests that a colro animation with multiple keys at a given time works sanely.
  89 TEST(KeyframedAnimationCurveTest, RepeatedColorKeyFrame) {
  90   SkColor color_a = SkColorSetARGB(255, 64, 0, 0);
  91   SkColor color_b = SkColorSetARGB(255, 192, 0, 0);
  92
  93   scoped_ptr<KeyframedColorAnimationCurve> curve(
  94       KeyframedColorAnimationCurve::Create());
  95   curve->AddKeyframe(
  96       ColorKeyframe::Create(0.0, color_a, scoped_ptr<TimingFunction>()));
  97   curve->AddKeyframe(
  98       ColorKeyframe::Create(1.0, color_a, scoped_ptr<TimingFunction>()));
  99   curve->AddKeyframe(
 100       ColorKeyframe::Create(1.0, color_b, scoped_ptr<TimingFunction>()));
 101   curve->AddKeyframe(
 102       ColorKeyframe::Create(2.0, color_b, scoped_ptr<TimingFunction>()));
 103
 104   EXPECT_SKCOLOR_EQ(color_a, curve->GetValue(-1.f));
 105   EXPECT_SKCOLOR_EQ(color_a, curve->GetValue(0.f));
 106   EXPECT_SKCOLOR_EQ(color_a, curve->GetValue(0.5f));
 107
 108   SkColor value = curve->GetValue(1.0f);
 109   EXPECT_EQ(255u, SkColorGetA(value));
 110   int red_value = SkColorGetR(value);
 111   EXPECT_LE(64, red_value);
 112   EXPECT_GE(192, red_value);
 113
 114   EXPECT_SKCOLOR_EQ(color_b, curve->GetValue(1.5f));
 115   EXPECT_SKCOLOR_EQ(color_b, curve->GetValue(2.f));
 116   EXPECT_SKCOLOR_EQ(color_b, curve->GetValue(3.f));
 117 }
 118
 119 // Tests that a float animation with one keyframe works as expected.
 120 TEST(KeyframedAnimationCurveTest, OneFloatKeyframe) {
 121   scoped_ptr<KeyframedFloatAnimationCurve> curve(
 122       KeyframedFloatAnimationCurve::Create());
 123   curve->AddKeyframe(
 124       FloatKeyframe::Create(0.0, 2.f, scoped_ptr<TimingFunction>()));
 125   EXPECT_FLOAT_EQ(2.f, curve->GetValue(-1.f));
 126   EXPECT_FLOAT_EQ(2.f, curve->GetValue(0.f));
 127   EXPECT_FLOAT_EQ(2.f, curve->GetValue(0.5f));
 128   EXPECT_FLOAT_EQ(2.f, curve->GetValue(1.f));
 129   EXPECT_FLOAT_EQ(2.f, curve->GetValue(2.f));
 130 }
 131
 132 // Tests that a float animation with two keyframes works as expected.
 133 TEST(KeyframedAnimationCurveTest, TwoFloatKeyframe) {
 134   scoped_ptr<KeyframedFloatAnimationCurve> curve(
 135       KeyframedFloatAnimationCurve::Create());
 136   curve->AddKeyframe(
 137       FloatKeyframe::Create(0.0, 2.f, scoped_ptr<TimingFunction>()));
 138   curve->AddKeyframe(
 139       FloatKeyframe::Create(1.0, 4.f, scoped_ptr<TimingFunction>()));
 140   EXPECT_FLOAT_EQ(2.f, curve->GetValue(-1.f));
 141   EXPECT_FLOAT_EQ(2.f, curve->GetValue(0.f));
 142   EXPECT_FLOAT_EQ(3.f, curve->GetValue(0.5f));
 143   EXPECT_FLOAT_EQ(4.f, curve->GetValue(1.f));
 144   EXPECT_FLOAT_EQ(4.f, curve->GetValue(2.f));
 145 }
 146
 147 // Tests that a float animation with three keyframes works as expected.
 148 TEST(KeyframedAnimationCurveTest, ThreeFloatKeyframe) {
 149   scoped_ptr<KeyframedFloatAnimationCurve> curve(
 150       KeyframedFloatAnimationCurve::Create());
 151   curve->AddKeyframe(
 152       FloatKeyframe::Create(0.0, 2.f, scoped_ptr<TimingFunction>()));
 153   curve->AddKeyframe(
 154       FloatKeyframe::Create(1.0, 4.f, scoped_ptr<TimingFunction>()));
 155   curve->AddKeyframe(
 156       FloatKeyframe::Create(2.0, 8.f, scoped_ptr<TimingFunction>()));
 157   EXPECT_FLOAT_EQ(2.f, curve->GetValue(-1.f));
 158   EXPECT_FLOAT_EQ(2.f, curve->GetValue(0.f));
 159   EXPECT_FLOAT_EQ(3.f, curve->GetValue(0.5f));
 160   EXPECT_FLOAT_EQ(4.f, curve->GetValue(1.f));
 161   EXPECT_FLOAT_EQ(6.f, curve->GetValue(1.5f));
 162   EXPECT_FLOAT_EQ(8.f, curve->GetValue(2.f));
 163   EXPECT_FLOAT_EQ(8.f, curve->GetValue(3.f));
 164 }
 165
 166 // Tests that a float animation with multiple keys at a given time works sanely.
 167 TEST(KeyframedAnimationCurveTest, RepeatedFloatKeyTimes) {
 168   scoped_ptr<KeyframedFloatAnimationCurve> curve(
 169       KeyframedFloatAnimationCurve::Create());
 170   curve->AddKeyframe(
 171       FloatKeyframe::Create(0.0, 4.f, scoped_ptr<TimingFunction>()));
 172   curve->AddKeyframe(
 173       FloatKeyframe::Create(1.0, 4.f, scoped_ptr<TimingFunction>()));
 174   curve->AddKeyframe(
 175       FloatKeyframe::Create(1.0, 6.f, scoped_ptr<TimingFunction>()));
 176   curve->AddKeyframe(
 177       FloatKeyframe::Create(2.0, 6.f, scoped_ptr<TimingFunction>()));
 178
 179   EXPECT_FLOAT_EQ(4.f, curve->GetValue(-1.f));
 180   EXPECT_FLOAT_EQ(4.f, curve->GetValue(0.f));
 181   EXPECT_FLOAT_EQ(4.f, curve->GetValue(0.5f));
 182
 183   // There is a discontinuity at 1. Any value between 4 and 6 is valid.
 184   float value = curve->GetValue(1.f);
 185   EXPECT_TRUE(value >= 4 && value <= 6);
 186
 187   EXPECT_FLOAT_EQ(6.f, curve->GetValue(1.5f));
 188   EXPECT_FLOAT_EQ(6.f, curve->GetValue(2.f));
 189   EXPECT_FLOAT_EQ(6.f, curve->GetValue(3.f));
 190 }
 191
 192 // Tests that a transform animation with one keyframe works as expected.
 193 TEST(KeyframedAnimationCurveTest, OneTransformKeyframe) {
 194   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 195       KeyframedTransformAnimationCurve::Create());
 196   TransformOperations operations;
 197   operations.AppendTranslate(2.f, 0.f, 0.f);
 198   curve->AddKeyframe(
 199       TransformKeyframe::Create(0.f, operations, scoped_ptr<TimingFunction>()));
 200
 201   ExpectTranslateX(2.f, curve->GetValue(-1.f));
 202   ExpectTranslateX(2.f, curve->GetValue(0.f));
 203   ExpectTranslateX(2.f, curve->GetValue(0.5f));
 204   ExpectTranslateX(2.f, curve->GetValue(1.f));
 205   ExpectTranslateX(2.f, curve->GetValue(2.f));
 206 }
 207
 208 // Tests that a transform animation with two keyframes works as expected.
 209 TEST(KeyframedAnimationCurveTest, TwoTransformKeyframe) {
 210   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 211       KeyframedTransformAnimationCurve::Create());
 212   TransformOperations operations1;
 213   operations1.AppendTranslate(2.f, 0.f, 0.f);
 214   TransformOperations operations2;
 215   operations2.AppendTranslate(4.f, 0.f, 0.f);
 216
 217   curve->AddKeyframe(TransformKeyframe::Create(
 218       0.f, operations1, scoped_ptr<TimingFunction>()));
 219   curve->AddKeyframe(TransformKeyframe::Create(
 220       1.f, operations2, scoped_ptr<TimingFunction>()));
 221   ExpectTranslateX(2.f, curve->GetValue(-1.f));
 222   ExpectTranslateX(2.f, curve->GetValue(0.f));
 223   ExpectTranslateX(3.f, curve->GetValue(0.5f));
 224   ExpectTranslateX(4.f, curve->GetValue(1.f));
 225   ExpectTranslateX(4.f, curve->GetValue(2.f));
 226 }
 227
 228 // Tests that a transform animation with three keyframes works as expected.
 229 TEST(KeyframedAnimationCurveTest, ThreeTransformKeyframe) {
 230   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 231       KeyframedTransformAnimationCurve::Create());
 232   TransformOperations operations1;
 233   operations1.AppendTranslate(2.f, 0.f, 0.f);
 234   TransformOperations operations2;
 235   operations2.AppendTranslate(4.f, 0.f, 0.f);
 236   TransformOperations operations3;
 237   operations3.AppendTranslate(8.f, 0.f, 0.f);
 238   curve->AddKeyframe(TransformKeyframe::Create(
 239       0.f, operations1, scoped_ptr<TimingFunction>()));
 240   curve->AddKeyframe(TransformKeyframe::Create(
 241       1.f, operations2, scoped_ptr<TimingFunction>()));
 242   curve->AddKeyframe(TransformKeyframe::Create(
 243       2.f, operations3, scoped_ptr<TimingFunction>()));
 244   ExpectTranslateX(2.f, curve->GetValue(-1.f));
 245   ExpectTranslateX(2.f, curve->GetValue(0.f));
 246   ExpectTranslateX(3.f, curve->GetValue(0.5f));
 247   ExpectTranslateX(4.f, curve->GetValue(1.f));
 248   ExpectTranslateX(6.f, curve->GetValue(1.5f));
 249   ExpectTranslateX(8.f, curve->GetValue(2.f));
 250   ExpectTranslateX(8.f, curve->GetValue(3.f));
 251 }
 252
 253 // Tests that a transform animation with multiple keys at a given time works
 254 // sanely.
 255 TEST(KeyframedAnimationCurveTest, RepeatedTransformKeyTimes) {
 256   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 257       KeyframedTransformAnimationCurve::Create());
 258   // A step function.
 259   TransformOperations operations1;
 260   operations1.AppendTranslate(4.f, 0.f, 0.f);
 261   TransformOperations operations2;
 262   operations2.AppendTranslate(4.f, 0.f, 0.f);
 263   TransformOperations operations3;
 264   operations3.AppendTranslate(6.f, 0.f, 0.f);
 265   TransformOperations operations4;
 266   operations4.AppendTranslate(6.f, 0.f, 0.f);
 267   curve->AddKeyframe(TransformKeyframe::Create(
 268       0.f, operations1, scoped_ptr<TimingFunction>()));
 269   curve->AddKeyframe(TransformKeyframe::Create(
 270       1.f, operations2, scoped_ptr<TimingFunction>()));
 271   curve->AddKeyframe(TransformKeyframe::Create(
 272       1.f, operations3, scoped_ptr<TimingFunction>()));
 273   curve->AddKeyframe(TransformKeyframe::Create(
 274       2.f, operations4, scoped_ptr<TimingFunction>()));
 275
 276   ExpectTranslateX(4.f, curve->GetValue(-1.f));
 277   ExpectTranslateX(4.f, curve->GetValue(0.f));
 278   ExpectTranslateX(4.f, curve->GetValue(0.5f));
 279
 280   // There is a discontinuity at 1. Any value between 4 and 6 is valid.
 281   gfx::Transform value = curve->GetValue(1.f);
 282   EXPECT_GE(value.matrix().get(0, 3), 4.f);
 283   EXPECT_LE(value.matrix().get(0, 3), 6.f);
 284
 285   ExpectTranslateX(6.f, curve->GetValue(1.5f));
 286   ExpectTranslateX(6.f, curve->GetValue(2.f));
 287   ExpectTranslateX(6.f, curve->GetValue(3.f));
 288 }
 289
 290 // Tests that a filter animation with one keyframe works as expected.
 291 TEST(KeyframedAnimationCurveTest, OneFilterKeyframe) {
 292   scoped_ptr<KeyframedFilterAnimationCurve> curve(
 293       KeyframedFilterAnimationCurve::Create());
 294   FilterOperations operations;
 295   operations.Append(FilterOperation::CreateBrightnessFilter(2.f));
 296   curve->AddKeyframe(
 297       FilterKeyframe::Create(0.f, operations, scoped_ptr<TimingFunction>()));
 298
 299   ExpectBrightness(2.f, curve->GetValue(-1.f));
 300   ExpectBrightness(2.f, curve->GetValue(0.f));
 301   ExpectBrightness(2.f, curve->GetValue(0.5f));
 302   ExpectBrightness(2.f, curve->GetValue(1.f));
 303   ExpectBrightness(2.f, curve->GetValue(2.f));
 304 }
 305
 306 // Tests that a filter animation with two keyframes works as expected.
 307 TEST(KeyframedAnimationCurveTest, TwoFilterKeyframe) {
 308   scoped_ptr<KeyframedFilterAnimationCurve> curve(
 309       KeyframedFilterAnimationCurve::Create());
 310   FilterOperations operations1;
 311   operations1.Append(FilterOperation::CreateBrightnessFilter(2.f));
 312   FilterOperations operations2;
 313   operations2.Append(FilterOperation::CreateBrightnessFilter(4.f));
 314
 315   curve->AddKeyframe(FilterKeyframe::Create(
 316       0.f, operations1, scoped_ptr<TimingFunction>()));
 317   curve->AddKeyframe(FilterKeyframe::Create(
 318       1.f, operations2, scoped_ptr<TimingFunction>()));
 319   ExpectBrightness(2.f, curve->GetValue(-1.f));
 320   ExpectBrightness(2.f, curve->GetValue(0.f));
 321   ExpectBrightness(3.f, curve->GetValue(0.5f));
 322   ExpectBrightness(4.f, curve->GetValue(1.f));
 323   ExpectBrightness(4.f, curve->GetValue(2.f));
 324 }
 325
 326 // Tests that a filter animation with three keyframes works as expected.
 327 TEST(KeyframedAnimationCurveTest, ThreeFilterKeyframe) {
 328   scoped_ptr<KeyframedFilterAnimationCurve> curve(
 329       KeyframedFilterAnimationCurve::Create());
 330   FilterOperations operations1;
 331   operations1.Append(FilterOperation::CreateBrightnessFilter(2.f));
 332   FilterOperations operations2;
 333   operations2.Append(FilterOperation::CreateBrightnessFilter(4.f));
 334   FilterOperations operations3;
 335   operations3.Append(FilterOperation::CreateBrightnessFilter(8.f));
 336   curve->AddKeyframe(FilterKeyframe::Create(
 337       0.f, operations1, scoped_ptr<TimingFunction>()));
 338   curve->AddKeyframe(FilterKeyframe::Create(
 339       1.f, operations2, scoped_ptr<TimingFunction>()));
 340   curve->AddKeyframe(FilterKeyframe::Create(
 341       2.f, operations3, scoped_ptr<TimingFunction>()));
 342   ExpectBrightness(2.f, curve->GetValue(-1.f));
 343   ExpectBrightness(2.f, curve->GetValue(0.f));
 344   ExpectBrightness(3.f, curve->GetValue(0.5f));
 345   ExpectBrightness(4.f, curve->GetValue(1.f));
 346   ExpectBrightness(6.f, curve->GetValue(1.5f));
 347   ExpectBrightness(8.f, curve->GetValue(2.f));
 348   ExpectBrightness(8.f, curve->GetValue(3.f));
 349 }
 350
 351 // Tests that a filter animation with multiple keys at a given time works
 352 // sanely.
 353 TEST(KeyframedAnimationCurveTest, RepeatedFilterKeyTimes) {
 354   scoped_ptr<KeyframedFilterAnimationCurve> curve(
 355       KeyframedFilterAnimationCurve::Create());
 356   // A step function.
 357   FilterOperations operations1;
 358   operations1.Append(FilterOperation::CreateBrightnessFilter(4.f));
 359   FilterOperations operations2;
 360   operations2.Append(FilterOperation::CreateBrightnessFilter(4.f));
 361   FilterOperations operations3;
 362   operations3.Append(FilterOperation::CreateBrightnessFilter(6.f));
 363   FilterOperations operations4;
 364   operations4.Append(FilterOperation::CreateBrightnessFilter(6.f));
 365   curve->AddKeyframe(FilterKeyframe::Create(
 366       0.f, operations1, scoped_ptr<TimingFunction>()));
 367   curve->AddKeyframe(FilterKeyframe::Create(
 368       1.f, operations2, scoped_ptr<TimingFunction>()));
 369   curve->AddKeyframe(FilterKeyframe::Create(
 370       1.f, operations3, scoped_ptr<TimingFunction>()));
 371   curve->AddKeyframe(FilterKeyframe::Create(
 372       2.f, operations4, scoped_ptr<TimingFunction>()));
 373
 374   ExpectBrightness(4.f, curve->GetValue(-1.f));
 375   ExpectBrightness(4.f, curve->GetValue(0.f));
 376   ExpectBrightness(4.f, curve->GetValue(0.5f));
 377
 378   // There is a discontinuity at 1. Any value between 4 and 6 is valid.
 379   FilterOperations value = curve->GetValue(1.f);
 380   EXPECT_EQ(1u, value.size());
 381   EXPECT_EQ(FilterOperation::BRIGHTNESS, value.at(0).type());
 382   EXPECT_GE(value.at(0).amount(), 4);
 383   EXPECT_LE(value.at(0).amount(), 6);
 384
 385   ExpectBrightness(6.f, curve->GetValue(1.5f));
 386   ExpectBrightness(6.f, curve->GetValue(2.f));
 387   ExpectBrightness(6.f, curve->GetValue(3.f));
 388 }
 389
 390 // Tests that the keyframes may be added out of order.
 391 TEST(KeyframedAnimationCurveTest, UnsortedKeyframes) {
 392   scoped_ptr<KeyframedFloatAnimationCurve> curve(
 393       KeyframedFloatAnimationCurve::Create());
 394   curve->AddKeyframe(
 395       FloatKeyframe::Create(2.0, 8.f, scoped_ptr<TimingFunction>()));
 396   curve->AddKeyframe(
 397       FloatKeyframe::Create(0.0, 2.f, scoped_ptr<TimingFunction>()));
 398   curve->AddKeyframe(
 399       FloatKeyframe::Create(1.0, 4.f, scoped_ptr<TimingFunction>()));
 400   EXPECT_FLOAT_EQ(2.f, curve->GetValue(-1.f));
 401   EXPECT_FLOAT_EQ(2.f, curve->GetValue(0.f));
 402   EXPECT_FLOAT_EQ(3.f, curve->GetValue(0.5f));
 403   EXPECT_FLOAT_EQ(4.f, curve->GetValue(1.f));
 404   EXPECT_FLOAT_EQ(6.f, curve->GetValue(1.5f));
 405   EXPECT_FLOAT_EQ(8.f, curve->GetValue(2.f));
 406   EXPECT_FLOAT_EQ(8.f, curve->GetValue(3.f));
 407 }
 408
 409 // Tests that a cubic bezier timing function works as expected.
 410 TEST(KeyframedAnimationCurveTest, CubicBezierTimingFunction) {
 411   scoped_ptr<KeyframedFloatAnimationCurve> curve(
 412       KeyframedFloatAnimationCurve::Create());
 413   curve->AddKeyframe(FloatKeyframe::Create(
 414       0.0,
 415       0.f,
 416       CubicBezierTimingFunction::Create(0.25f, 0.f, 0.75f, 1.f)
 417           .PassAs<TimingFunction>()));
 418   curve->AddKeyframe(
 419       FloatKeyframe::Create(1.0, 1.f, scoped_ptr<TimingFunction>()));
 420
 421   EXPECT_FLOAT_EQ(0.f, curve->GetValue(0.f));
 422   EXPECT_LT(0.f, curve->GetValue(0.25f));
 423   EXPECT_GT(0.25f, curve->GetValue(0.25f));
 424   EXPECT_NEAR(curve->GetValue(0.5f), 0.5f, 0.00015f);
 425   EXPECT_LT(0.75f, curve->GetValue(0.75f));
 426   EXPECT_GT(1.f, curve->GetValue(0.75f));
 427   EXPECT_FLOAT_EQ(1.f, curve->GetValue(1.f));
 428 }
 429
 430 // Tests that animated bounds are computed as expected.
 431 TEST(KeyframedAnimationCurveTest, AnimatedBounds) {
 432   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 433       KeyframedTransformAnimationCurve::Create());
 434
 435   TransformOperations operations1;
 436   curve->AddKeyframe(TransformKeyframe::Create(
 437       0.0, operations1, scoped_ptr<TimingFunction>()));
 438   operations1.AppendTranslate(2.0, 3.0, -1.0);
 439   curve->AddKeyframe(TransformKeyframe::Create(
 440       0.5, operations1, scoped_ptr<TimingFunction>()));
 441   TransformOperations operations2;
 442   operations2.AppendTranslate(4.0, 1.0, 2.0);
 443   curve->AddKeyframe(TransformKeyframe::Create(
 444       1.0, operations2, EaseTimingFunction::Create()));
 445
 446   gfx::BoxF box(2.f, 3.f, 4.f, 1.f, 3.f, 2.f);
 447   gfx::BoxF bounds;
 448
 449   EXPECT_TRUE(curve->AnimatedBoundsForBox(box, &bounds));
 450   EXPECT_EQ(gfx::BoxF(2.f, 3.f, 3.f, 5.f, 6.f, 5.f).ToString(),
 451             bounds.ToString());
 452 }
 453
 454 // Tests that animations that affect scale are correctly identified.
 455 TEST(KeyframedAnimationCurveTest, AffectsScale) {
 456   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 457       KeyframedTransformAnimationCurve::Create());
 458
 459   TransformOperations operations1;
 460   curve->AddKeyframe(TransformKeyframe::Create(
 461       0.0, operations1, scoped_ptr<TimingFunction>()));
 462   operations1.AppendTranslate(2.0, 3.0, -1.0);
 463   TransformOperations operations2;
 464   operations2.AppendTranslate(4.0, 1.0, 2.0);
 465   curve->AddKeyframe(TransformKeyframe::Create(
 466       1.0, operations2, scoped_ptr<TimingFunction>()));
 467
 468   EXPECT_FALSE(curve->AffectsScale());
 469
 470   TransformOperations operations3;
 471   operations3.AppendScale(2.f, 2.f, 2.f);
 472   curve->AddKeyframe(TransformKeyframe::Create(
 473       2.0, operations3, scoped_ptr<TimingFunction>()));
 474
 475   EXPECT_TRUE(curve->AffectsScale());
 476
 477   TransformOperations operations4;
 478   operations3.AppendTranslate(2.f, 2.f, 2.f);
 479   curve->AddKeyframe(TransformKeyframe::Create(
 480       3.0, operations4, scoped_ptr<TimingFunction>()));
 481
 482   EXPECT_TRUE(curve->AffectsScale());
 483 }
 484
 485 // Tests that animations that are translations are correctly identified.
 486 TEST(KeyframedAnimationCurveTest, IsTranslation) {
 487   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 488       KeyframedTransformAnimationCurve::Create());
 489
 490   TransformOperations operations1;
 491   curve->AddKeyframe(TransformKeyframe::Create(
 492       0.0, operations1, scoped_ptr<TimingFunction>()));
 493   operations1.AppendTranslate(2.0, 3.0, -1.0);
 494   TransformOperations operations2;
 495   operations2.AppendTranslate(4.0, 1.0, 2.0);
 496   curve->AddKeyframe(TransformKeyframe::Create(
 497       1.0, operations2, scoped_ptr<TimingFunction>()));
 498
 499   EXPECT_TRUE(curve->IsTranslation());
 500
 501   TransformOperations operations3;
 502   operations3.AppendScale(2.f, 2.f, 2.f);
 503   curve->AddKeyframe(TransformKeyframe::Create(
 504       2.0, operations3, scoped_ptr<TimingFunction>()));
 505
 506   EXPECT_FALSE(curve->IsTranslation());
 507
 508   TransformOperations operations4;
 509   operations3.AppendTranslate(2.f, 2.f, 2.f);
 510   curve->AddKeyframe(TransformKeyframe::Create(
 511       3.0, operations4, scoped_ptr<TimingFunction>()));
 512
 513   EXPECT_FALSE(curve->IsTranslation());
 514 }
 515
 516 // Tests that maximum target scale is computed as expected.
 517 TEST(KeyframedAnimationCurveTest, MaximumTargetScale) {
 518   scoped_ptr<KeyframedTransformAnimationCurve> curve(
 519       KeyframedTransformAnimationCurve::Create());
 520
 521   TransformOperations operations1;
 522   curve->AddKeyframe(TransformKeyframe::Create(
 523       0.0, operations1, scoped_ptr<TimingFunction>()));
 524   operations1.AppendScale(2.f, -3.f, 1.f);
 525   curve->AddKeyframe(TransformKeyframe::Create(
 526       1.0, operations1, EaseTimingFunction::Create()));
 527
 528   float maximum_scale = 0.f;
 529   EXPECT_TRUE(curve->MaximumTargetScale(true, &maximum_scale));
 530   EXPECT_EQ(3.f, maximum_scale);
 531
 532   TransformOperations operations2;
 533   operations2.AppendScale(6.f, 3.f, 2.f);
 534   curve->AddKeyframe(TransformKeyframe::Create(
 535       2.0, operations2, EaseTimingFunction::Create()));
 536
 537   EXPECT_TRUE(curve->MaximumTargetScale(true, &maximum_scale));
 538   EXPECT_EQ(6.f, maximum_scale);
 539
 540   TransformOperations operations3;
 541   operations3.AppendRotate(1.f, 0.f, 0.f, 90.f);
 542   curve->AddKeyframe(TransformKeyframe::Create(
 543       3.0, operations3, EaseTimingFunction::Create()));
 544
 545   EXPECT_FALSE(curve->MaximumTargetScale(true, &maximum_scale));
 546
 547   // The original scale is not used in computing the max.
 548   scoped_ptr<KeyframedTransformAnimationCurve> curve2(
 549       KeyframedTransformAnimationCurve::Create());
 550
 551   TransformOperations operations4;
 552   operations4.AppendScale(0.4f, 0.2f, 0.6f);
 553   curve2->AddKeyframe(TransformKeyframe::Create(
 554       0.0, operations4, EaseTimingFunction::Create()));
 555   TransformOperations operations5;
 556   operations5.AppendScale(0.5f, 0.3f, -0.8f);
 557   curve2->AddKeyframe(TransformKeyframe::Create(
 558       1.0, operations5, EaseTimingFunction::Create()));
 559
 560   EXPECT_TRUE(curve2->MaximumTargetScale(true, &maximum_scale));
 561   EXPECT_EQ(0.8f, maximum_scale);
 562
 563   EXPECT_TRUE(curve2->MaximumTargetScale(false, &maximum_scale));
 564   EXPECT_EQ(0.6f, maximum_scale);
 565 }
 566
 567 }  // namespace
 568 }  // namespace cc