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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// 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 "base/basictypes.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/rect.h"
namespace {
void CheckApproximatelyEqual(const gfx::Transform& lhs,
const gfx::Transform& rhs) {
for (int i = 0; i < 4; ++i) {
for (int j = 0; j < 4; ++j) {
EXPECT_FLOAT_EQ(lhs.matrix().get(i, j), rhs.matrix().get(i, j));
}
}
}
float NormalizeAngle(float angle) {
while (angle < 0.0f) {
angle += 360.0f;
}
while (angle > 360.0f) {
angle -= 360.0f;
}
return angle;
}
} // namespace
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);
CheckApproximatelyEqual(rotation, interpolated);
interpolated = interpolated_rotation_diff_start_end.Interpolate(i + 100);
CheckApproximatelyEqual(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.Scale(i, i);
gfx::Transform interpolated = interpolated_scale.Interpolate(i / 100.0f);
CheckApproximatelyEqual(scale, interpolated);
interpolated = interpolated_scale_diff_start_end.Interpolate(i + 100);
CheckApproximatelyEqual(scale, interpolated);
}
}
TEST(InterpolatedTransformTest, InterpolatedTranslate) {
ui::InterpolatedTranslation interpolated_xform(gfx::Point(0, 0),
gfx::Point(100, 100));
ui::InterpolatedTranslation interpolated_xform_diff_start_end(
gfx::Point(0, 0), gfx::Point(100, 100), 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);
CheckApproximatelyEqual(xform, interpolated);
interpolated = interpolated_xform_diff_start_end.Interpolate(i + 100);
CheckApproximatelyEqual(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,
new ui::InterpolatedRotation(0, 90));
gfx::Transform result = interpolated_xform.Interpolate(0.0f);
CheckApproximatelyEqual(gfx::Transform(), result);
result = interpolated_xform.Interpolate(1.0f);
gfx::Point expected_result = pivot;
result.TransformPoint(pivot);
EXPECT_EQ(expected_result, pivot);
expected_result = gfx::Point(0, 100);
result.TransformPoint(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,
new ui::InterpolatedScale(gfx::Point3F(1, 1, 1), gfx::Point3F(2, 2, 2)));
gfx::Transform result = interpolated_xform.Interpolate(0.0f);
CheckApproximatelyEqual(gfx::Transform(), result);
result = interpolated_xform.Interpolate(1.0f);
gfx::Point expected_result = pivot;
result.TransformPoint(pivot);
EXPECT_EQ(expected_result, pivot);
expected_result = gfx::Point(100, 300);
result.TransformPoint(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;
}
scoped_ptr<ui::InterpolatedTransform> rotation(
new ui::InterpolatedTransformAboutPivot(
old_pivot,
new ui::InterpolatedRotation(reversed ? degrees : 0,
reversed ? 0 : degrees)));
scoped_ptr<ui::InterpolatedTransform> translation(
new ui::InterpolatedTranslation(
gfx::Point(0, 0),
gfx::Point(new_pivot.x() - old_pivot.x(),
new_pivot.y() - old_pivot.y())));
float scale_factor = 0.9f;
scoped_ptr<ui::InterpolatedTransform> scale_down(
new ui::InterpolatedScale(1.0f, scale_factor, 0.0f, 0.5f));
scoped_ptr<ui::InterpolatedTransform> scale_up(
new ui::InterpolatedScale(1.0f, 1.0f / scale_factor, 0.5f, 1.0f));
scoped_ptr<ui::InterpolatedTransform> to_return(
new ui::InterpolatedConstantTransform(gfx::Transform()));
scale_up->SetChild(scale_down.release());
translation->SetChild(scale_up.release());
rotation->SetChild(translation.release());
to_return->SetChild(rotation.release());
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;
scoped_ptr<ui::InterpolatedTransform> screen_rotation(
GetScreenRotation(degrees, reversed));
gfx::Transform interpolated = screen_rotation->Interpolate(1.0f);
SkMatrix44& m = interpolated.matrix();
// 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 = m.get(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();
scoped_ptr<ui::InterpolatedTransform> scale(
new ui::InterpolatedScale(gfx::Point3F(1, 1, 1),
gfx::Point3F(scale_x, scale_y, 1)));
scoped_ptr<ui::InterpolatedTransform> translation(
new ui::InterpolatedTranslation(
gfx::Point(),
gfx::Point(target_bounds.x() - initial_bounds.x(),
target_bounds.y() - initial_bounds.y())));
scoped_ptr<ui::InterpolatedTransform> rotation(
new ui::InterpolatedRotation(0, 4.0f));
scoped_ptr<ui::InterpolatedTransform> rotation_about_pivot(
new ui::InterpolatedTransformAboutPivot(
gfx::Point(initial_bounds.width() * 0.5,
initial_bounds.height() * 0.5),
rotation.release()));
scale->SetChild(translation.release());
rotation_about_pivot->SetChild(scale.release());
rotation_about_pivot->SetReversed(true);
return rotation_about_pivot.release();
}
TEST(InterpolatedTransformTest, MaximizeEndsCleanly) {
scoped_ptr<ui::InterpolatedTransform> maximize(GetMaximize());
gfx::Transform interpolated = maximize->Interpolate(1.0f);
SkMatrix44& m = interpolated.matrix();
// 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 = m.get(row, col);
EXPECT_TRUE(entry == 0 || entry == 1 || entry == -1);
}
}
}
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