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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <compositionengine/ProjectionSpace.h>
#include <gtest/gtest.h>
namespace android::compositionengine {
namespace {
// Returns a rectangular strip along the side of the given rect pointed by
// rotation. E.g. if rotation is ROTATION_0, the srip will be along the top
// side, if it is ROTATION_90 the stip will be along the right wall.
// One of the dimensions of the strip will be 0 and the other one will match
// the length of the corresponding side.
// The strip will be contained inside the given rect.
Rect getSideStrip(const Rect& rect, ui::Rotation rotation) {
int width, height;
if (rotation == ui::ROTATION_90 || rotation == ui::ROTATION_270) {
width = 0;
height = rect.height();
} else {
width = rect.width();
height = 0;
}
if (rotation == ui::ROTATION_0 || rotation == ui::ROTATION_270) {
return Rect(rect.left, rect.top, rect.left + width, rect.top + height);
}
if (rotation == ui::ROTATION_90) {
return Rect(rect.right, rect.top, rect.right + width, rect.top + height);
}
if (rotation == ui::ROTATION_180) {
return Rect(rect.left, rect.bottom, rect.left + width, rect.bottom + height);
}
return Rect::INVALID_RECT;
}
} // namespace
TEST(ProjectionSpaceTest, getTransformToSelfIsIdentity) {
ProjectionSpace space;
space.setContent(Rect(100, 200));
space.setBounds(ui::Size(100, 200));
const ui::Transform identity;
for (int rotation = 0; rotation <= 3; rotation++) {
space.setOrientation(ui::Rotation(rotation));
EXPECT_EQ(space.getTransform(space), identity);
}
}
TEST(ProjectionSpaceTest, getTransformWhenTranslationIsNeeded) {
ProjectionSpace source;
source.setContent(Rect(10, 10, 20, 20));
source.setBounds(ui::Size(100, 200));
ProjectionSpace dest;
dest.setContent(Rect(10, 20, 30, 20));
dest.setBounds(source.getBounds());
const auto transform = source.getTransform(dest);
EXPECT_EQ(transform.transform(source.getContent()), dest.getContent());
}
TEST(ProjectionSpaceTest, getTransformWhenScaleIsNeeded) {
ProjectionSpace source;
source.setContent(Rect(0, 0, 20, 20));
source.setBounds(ui::Size(100, 200));
ProjectionSpace dest;
dest.setContent(Rect(0, 0, 40, 30));
dest.setBounds(source.getBounds());
const auto transform = source.getTransform(dest);
EXPECT_EQ(transform.transform(source.getContent()), dest.getContent());
}
TEST(ProjectionSpaceTest, getSideStripTest) {
const Rect rect(10, 20, 40, 100);
EXPECT_EQ(getSideStrip(rect, ui::ROTATION_0), Rect(10, 20, 40, 20));
EXPECT_EQ(getSideStrip(rect, ui::ROTATION_90), Rect(40, 20, 40, 100));
EXPECT_EQ(getSideStrip(rect, ui::ROTATION_180), Rect(10, 100, 40, 100));
EXPECT_EQ(getSideStrip(rect, ui::ROTATION_270), Rect(10, 20, 10, 100));
}
void testTransform(const ProjectionSpace& source, const ProjectionSpace& dest) {
const auto transform = source.getTransform(dest);
EXPECT_EQ(transform.transform(source.getContent()), dest.getContent())
<< "Source content doesn't map to dest content when projecting " << to_string(source)
<< " onto " << to_string(dest);
// We take a strip at the top (according to the orientation) of each
// content rect and verify that transform maps between them. This way we
// verify that the transform is rotating properly.
// In the following example the strip is marked with asterisks:
//
// ******* +-------*
// | | | *
// | | | *
// +-----+ +-------*
// source(ROTATION_0) dest (ROTATION_90)
const auto sourceStrip = getSideStrip(source.getContent(), source.getOrientation());
const auto destStrip = getSideStrip(dest.getContent(), dest.getOrientation());
ASSERT_NE(sourceStrip, Rect::INVALID_RECT);
ASSERT_NE(destStrip, Rect::INVALID_RECT);
const auto mappedStrip = transform.transform(sourceStrip);
EXPECT_EQ(mappedStrip, destStrip)
<< to_string(sourceStrip) << " maps to " << to_string(mappedStrip) << " instead of "
<< to_string(destStrip) << " when projecting " << to_string(source) << " onto "
<< to_string(dest);
}
TEST(ProjectionSpaceTest, getTransformWithOrienations) {
ProjectionSpace source;
source.setBounds(ui::Size(666, 776));
source.setContent(Rect(40, 50, 234, 343));
ProjectionSpace dest;
dest.setBounds(ui::Size(862, 546));
dest.setContent(Rect(43, 52, 432, 213));
for (int sourceRot = 0; sourceRot <= 3; sourceRot++) {
source.setOrientation(ui::Rotation(sourceRot));
for (int destRot = 0; destRot <= 3; destRot++) {
dest.setOrientation(ui::Rotation(destRot));
testTransform(source, dest);
}
}
}
} // namespace android::compositionengine
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