1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <sstream>
18#include <android/hardware/graphics/common/1.0/types.h>
19
20#include "Hwc2TestPixelComparator.h"
21
22using android::hardware::graphics::common::V1_0::BufferUsage;
23
24uint32_t ComparatorResult::getPixel(int32_t x, int32_t y, uint32_t stride,
25        uint8_t* img) const
26{
27    uint32_t r = img[(y * stride + x) * 4 + 0];
28    uint32_t g = img[(y * stride + x) * 4 + 1];
29    uint32_t b = img[(y * stride + x) * 4 + 2];
30    uint32_t a = img[(y * stride + x) * 4 + 3];
31
32    uint32_t pixel = 0;
33    pixel |= r;
34    pixel |= g << 8;
35    pixel |= b << 16;
36    pixel |= a << 24;
37    return pixel;
38}
39
40void ComparatorResult::CompareBuffers(
41        android::sp<android::GraphicBuffer>& resultBuffer,
42        android::sp<android::GraphicBuffer>& expectedBuffer)
43{
44    uint8_t* resultBufferImg;
45    uint8_t* expectedBufferImg;
46    resultBuffer->lock(static_cast<uint32_t>(BufferUsage::CPU_READ_OFTEN),
47            (void**)(&resultBufferImg));
48
49    expectedBuffer->lock(static_cast<uint32_t>(BufferUsage::CPU_READ_OFTEN),
50            (void**)(&expectedBufferImg));
51    mComparisons.clear();
52    int32_t mDifferentPixelCount = 0;
53    int32_t mBlankPixelCount = 0;
54
55    for (uint32_t y = 0; y < resultBuffer->getHeight(); y++) {
56        for (uint32_t x = 0; x < resultBuffer->getWidth(); x++) {
57            uint32_t result = getPixel(x, y, resultBuffer->getStride(),
58                    resultBufferImg);
59            uint32_t expected = getPixel(x, y, expectedBuffer->getStride(),
60                    expectedBufferImg);
61
62            if (result == 0)
63                mBlankPixelCount++;
64
65            if (result != expected)
66                mDifferentPixelCount++;
67
68            mComparisons.emplace_back(std::make_tuple(x, y, result, expected));
69        }
70    }
71    resultBuffer->unlock();
72    expectedBuffer->unlock();
73}
74
75std::string ComparatorResult::pixelDiff(uint32_t x, uint32_t y,
76        uint32_t resultPixel, uint32_t expectedPixel) const
77{
78    uint32_t resultAlpha = (resultPixel >> 24) & 0xFF;
79    uint32_t resultBlue = (resultPixel >> 16) & 0xFF;
80    uint32_t resultGreen = (resultPixel >> 8) & 0xFF;
81    uint32_t resultRed = resultPixel & 0xFF;
82
83    uint32_t expectedAlpha = (expectedPixel >> 24) & 0xFF;
84    uint32_t expectedBlue = (expectedPixel >> 16) & 0xFF;
85    uint32_t expectedGreen = (expectedPixel >> 8) & 0xFF;
86    uint32_t expectedRed = expectedPixel & 0xFF;
87
88    std::ostringstream stream;
89
90    stream << "x: " << x << " y: " << y << std::endl;
91    stream << std::hex;
92    stream << "Result pixel:   " << resultRed << "|" << resultGreen << "|"
93           << resultBlue << "|" << resultAlpha << std::endl;
94
95    stream << "Expected pixel: " << expectedRed << "|" << expectedGreen << "|"
96           << expectedBlue << "|" << expectedAlpha << std::endl;
97
98    return stream.str();
99}
100
101std::string ComparatorResult::dumpComparison() const
102{
103    std::ostringstream stream;
104    stream << "Number of different pixels: " << mDifferentPixelCount;
105
106    for (const auto& comparison : mComparisons) {
107        if (std::get<2>(comparison) != std::get<3>(comparison))
108            stream << pixelDiff(std::get<0>(comparison),
109                    std::get<1>(comparison), std::get<2>(comparison),
110                    std::get<3>(comparison));
111    }
112    return stream.str();
113}
114