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/*
* Copyright 2019 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.
*/
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wconversion"
#undef LOG_TAG
#define LOG_TAG "RegionSamplingTest"
#include <ui/Transform.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <array>
#include <limits>
#include "RegionSamplingThread.h"
namespace android {
struct RegionSamplingTest : testing::Test {
public:
static uint32_t constexpr kBlack = 0;
static uint32_t constexpr kWhite = std::numeric_limits<uint32_t>::max();
static int constexpr kWidth = 98;
static int constexpr kStride = 100;
static int constexpr kHeight = 29;
static int constexpr kOrientation = ui::Transform::ROT_0;
std::array<uint32_t, kHeight * kStride> buffer;
Rect const whole_area{0, 0, kWidth, kHeight};
};
TEST_F(RegionSamplingTest, calculate_mean_white) {
std::fill(buffer.begin(), buffer.end(), kWhite);
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, whole_area),
testing::FloatEq(1.0f));
}
TEST_F(RegionSamplingTest, calculate_mean_black) {
std::fill(buffer.begin(), buffer.end(), kBlack);
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, whole_area),
testing::FloatEq(0.0f));
}
TEST_F(RegionSamplingTest, calculate_mean_partial_region) {
auto const halfway_down = kHeight >> 1;
auto const half = halfway_down * kStride;
Rect const partial_region = {whole_area.left, whole_area.top, whole_area.right,
whole_area.top + halfway_down};
std::fill(buffer.begin(), buffer.begin() + half, 0);
std::fill(buffer.begin() + half, buffer.end(), kWhite);
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, partial_region),
testing::FloatEq(0.0f));
}
TEST_F(RegionSamplingTest, calculate_mean_mixed_values) {
std::generate(buffer.begin(), buffer.end(), [n = 0]() mutable {
uint32_t const pixel = (n % std::numeric_limits<uint8_t>::max()) << ((n % 3) * CHAR_BIT);
n++;
return pixel;
});
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, whole_area),
testing::FloatNear(0.16f, 0.01f));
}
TEST_F(RegionSamplingTest, bimodal_tiebreaker) {
std::generate(buffer.begin(), buffer.end(),
[n = 0]() mutable { return (n++ % 2) ? kBlack : kWhite; });
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, whole_area),
testing::FloatEq(0.5f));
}
TEST_F(RegionSamplingTest, bounds_checking) {
std::generate(buffer.begin(), buffer.end(),
[n = 0]() mutable { return (n++ > (kStride * kHeight >> 1)) ? kBlack : kWhite; });
Rect invalid_region{0, 0, 4, kHeight + 1};
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, invalid_region),
testing::Eq(0.0));
invalid_region = Rect{0, 0, -4, kHeight};
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, invalid_region),
testing::Eq(0.0));
invalid_region = Rect{3, 0, 2, 0};
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, invalid_region),
testing::Eq(0.0));
invalid_region = Rect{0, 3, 0, 2};
EXPECT_THAT(sampleArea(buffer.data(), kWidth, kHeight, kStride, kOrientation, invalid_region),
testing::Eq(0.0));
}
} // namespace android
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic pop // ignored "-Wconversion"
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