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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/interpolated_transform.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/test/geometry_util.h"
TEST(InterpolatedTransformTest, InterpolatedRotation) {
ui::InterpolatedRotation interpolated_rotation(0, 100);
ui::InterpolatedRotation interpolated_rotation_diff_start_end(
0, 100, 100, 200);
for (int i = 0; i <= 100; ++i) {
gfx::Transform rotation;
rotation.Rotate(i);
gfx::Transform interpolated = interpolated_rotation.Interpolate(i / 100.0f);
EXPECT_TRANSFORM_EQ(rotation, interpolated);
interpolated = interpolated_rotation_diff_start_end.Interpolate(i + 100);
EXPECT_TRANSFORM_EQ(rotation, interpolated);
}
}
TEST(InterpolatedTransformTest, InterpolatedScale) {
ui::InterpolatedScale interpolated_scale(gfx::Point3F(0, 0, 0),
gfx::Point3F(100, 100, 100));
ui::InterpolatedScale interpolated_scale_diff_start_end(
gfx::Point3F(0, 0, 0), gfx::Point3F(100, 100, 100), 100, 200);
for (int i = 0; i <= 100; ++i) {
gfx::Transform scale;
scale.Scale3d(i, i, i);
gfx::Transform interpolated = interpolated_scale.Interpolate(i / 100.0f);
EXPECT_TRANSFORM_EQ(scale, interpolated);
interpolated = interpolated_scale_diff_start_end.Interpolate(i + 100);
EXPECT_TRANSFORM_EQ(scale, interpolated);
}
}
TEST(InterpolatedTransformTest, InterpolatedTranslate) {
ui::InterpolatedTranslation interpolated_xform(gfx::PointF(),
gfx::PointF(100.f, 100.f));
ui::InterpolatedTranslation interpolated_xform_diff_start_end(
gfx::PointF(), gfx::PointF(100.f, 100.f), 100, 200);
for (int i = 0; i <= 100; ++i) {
gfx::Transform xform;
xform.Translate(i, i);
gfx::Transform interpolated = interpolated_xform.Interpolate(i / 100.0f);
EXPECT_TRANSFORM_EQ(xform, interpolated);
interpolated = interpolated_xform_diff_start_end.Interpolate(i + 100);
EXPECT_TRANSFORM_EQ(xform, interpolated);
}
}
TEST(InterpolatedTransformTest, InterpolatedTranslate3d) {
ui::InterpolatedTranslation interpolated_xform(gfx::Point3F(0, 0, 0),
gfx::Point3F(100, 100, 100));
ui::InterpolatedTranslation interpolated_xform_diff_start_end(
gfx::Point3F(0, 0, 0), gfx::Point3F(100, 100, 100), 100, 200);
for (int i = 0; i <= 100; ++i) {
gfx::Transform xform;
xform.Translate3d(i, i, i);
gfx::Transform interpolated = interpolated_xform.Interpolate(i / 100.0f);
EXPECT_TRANSFORM_EQ(xform, interpolated);
interpolated = interpolated_xform_diff_start_end.Interpolate(i + 100);
EXPECT_TRANSFORM_EQ(xform, interpolated);
}
}
TEST(InterpolatedTransformTest, InterpolatedRotationAboutPivot) {
gfx::Point pivot(100, 100);
gfx::Point above_pivot(100, 200);
ui::InterpolatedRotation rot(0, 90);
ui::InterpolatedTransformAboutPivot interpolated_xform(
pivot, std::make_unique<ui::InterpolatedRotation>(0, 90));
gfx::Transform result = interpolated_xform.Interpolate(0.0f);
EXPECT_TRANSFORM_EQ(gfx::Transform(), result);
result = interpolated_xform.Interpolate(1.0f);
gfx::Point expected_result = pivot;
pivot = result.MapPoint(pivot);
EXPECT_EQ(expected_result, pivot);
expected_result = gfx::Point(0, 100);
above_pivot = result.MapPoint(above_pivot);
EXPECT_EQ(expected_result, above_pivot);
}
TEST(InterpolatedTransformTest, InterpolatedScaleAboutPivot) {
gfx::Point pivot(100, 100);
gfx::Point above_pivot(100, 200);
ui::InterpolatedTransformAboutPivot interpolated_xform(
pivot, std::make_unique<ui::InterpolatedScale>(gfx::Point3F(1, 1, 1),
gfx::Point3F(2, 2, 2)));
gfx::Transform result = interpolated_xform.Interpolate(0.0f);
EXPECT_TRANSFORM_EQ(gfx::Transform(), result);
result = interpolated_xform.Interpolate(1.0f);
gfx::Point expected_result = pivot;
pivot = result.MapPoint(pivot);
EXPECT_EQ(expected_result, pivot);
expected_result = gfx::Point(100, 300);
above_pivot = result.MapPoint(above_pivot);
EXPECT_EQ(expected_result, above_pivot);
}
ui::InterpolatedTransform* GetScreenRotation(int degrees, bool reversed) {
gfx::Point old_pivot;
gfx::Point new_pivot;
int width = 1920;
int height = 180;
switch (degrees) {
case 90:
new_pivot = gfx::Point(width, 0);
break;
case -90:
new_pivot = gfx::Point(0, height);
break;
case 180:
case 360:
new_pivot = old_pivot = gfx::Point(width / 2, height / 2);
break;
}
std::unique_ptr<ui::InterpolatedTransform> rotation =
std::make_unique<ui::InterpolatedTransformAboutPivot>(
old_pivot, std::make_unique<ui::InterpolatedRotation>(
reversed ? degrees : 0, reversed ? 0 : degrees));
std::unique_ptr<ui::InterpolatedTransform> translation =
std::make_unique<ui::InterpolatedTranslation>(
gfx::PointF(), gfx::PointF(new_pivot.x() - old_pivot.x(),
new_pivot.y() - old_pivot.y()));
float scale_factor = 0.9f;
std::unique_ptr<ui::InterpolatedTransform> scale_down =
std::make_unique<ui::InterpolatedScale>(1.0f, scale_factor, 0.0f, 0.5f);
std::unique_ptr<ui::InterpolatedTransform> scale_up =
std::make_unique<ui::InterpolatedScale>(1.0f, 1.0f / scale_factor, 0.5f,
1.0f);
std::unique_ptr<ui::InterpolatedTransform> to_return =
std::make_unique<ui::InterpolatedConstantTransform>(gfx::Transform());
scale_up->SetChild(std::move(scale_down));
translation->SetChild(std::move(scale_up));
rotation->SetChild(std::move(translation));
to_return->SetChild(std::move(rotation));
to_return->SetReversed(reversed);
return to_return.release();
}
TEST(InterpolatedTransformTest, ScreenRotationEndsCleanly) {
for (int i = 0; i < 2; ++i) {
for (int degrees = -360; degrees <= 360; degrees += 90) {
const bool reversed = i == 1;
std::unique_ptr<ui::InterpolatedTransform> screen_rotation(
GetScreenRotation(degrees, reversed));
gfx::Transform interpolated = screen_rotation->Interpolate(1.0f);
// Upper-left 3x3 matrix should all be 0, 1 or -1.
for (int row = 0; row < 3; ++row) {
for (int col = 0; col < 3; ++col) {
float entry = interpolated.rc(row, col);
EXPECT_TRUE(entry == 0 || entry == 1 || entry == -1);
}
}
}
}
}
ui::InterpolatedTransform* GetMaximize() {
gfx::Rect target_bounds(0, 0, 1920, 1080);
gfx::Rect initial_bounds(30, 1000, 192, 108);
float scale_x = static_cast<float>(
target_bounds.height()) / initial_bounds.width();
float scale_y = static_cast<float>(
target_bounds.width()) / initial_bounds.height();
std::unique_ptr<ui::InterpolatedTransform> scale =
std::make_unique<ui::InterpolatedScale>(
gfx::Point3F(1, 1, 1), gfx::Point3F(scale_x, scale_y, 1));
std::unique_ptr<ui::InterpolatedTransform> translation =
std::make_unique<ui::InterpolatedTranslation>(
gfx::PointF(), gfx::PointF(target_bounds.x() - initial_bounds.x(),
target_bounds.y() - initial_bounds.y()));
std::unique_ptr<ui::InterpolatedTransform> rotation =
std::make_unique<ui::InterpolatedRotation>(0, 4.0f);
std::unique_ptr<ui::InterpolatedTransform> rotation_about_pivot(
std::make_unique<ui::InterpolatedTransformAboutPivot>(
gfx::Point(initial_bounds.width() * 0.5,
initial_bounds.height() * 0.5),
std::move(rotation)));
scale->SetChild(std::move(translation));
rotation_about_pivot->SetChild(std::move(scale));
rotation_about_pivot->SetReversed(true);
return rotation_about_pivot.release();
}
TEST(InterpolatedTransformTest, MaximizeEndsCleanly) {
std::unique_ptr<ui::InterpolatedTransform> maximize(GetMaximize());
gfx::Transform interpolated = maximize->Interpolate(1.0f);
// Upper-left 3x3 matrix should all be 0, 1 or -1.
for (int row = 0; row < 3; ++row) {
for (int col = 0; col < 3; ++col) {
float entry = interpolated.rc(row, col);
EXPECT_TRUE(entry == 0 || entry == 1 || entry == -1);
}
}
}
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