1 /* 2 Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies) 3 4 This library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Library General Public 6 License as published by the Free Software Foundation; either 7 version 2 of the License, or (at your option) any later version. 8 9 This library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Library General Public License for more details. 13 14 You should have received a copy of the GNU Library General Public License 15 along with this library; see the file COPYING.LIB. If not, write to 16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 Boston, MA 02110-1301, USA. 18 */ 19 20 #include <QtCore/qmath.h> 21 22 #include <QApplication> 23 #include <QBuffer> 24 #include <QByteArray> 25 #include <QImage> 26 #include <QStringList> 27 28 #include <stdio.h> 29 30 int main(int argc, char* argv[]) 31 { 32 QCoreApplication app(argc, argv); 33 34 qreal tolerance = 0; 35 36 QStringList args = app.arguments(); 37 for (int i = 0; i < argc; ++i) 38 if (args[i] == "-t" || args[i] == "--tolerance") 39 tolerance = args[i + 1].toDouble(); 40 41 char buffer[2048]; 42 QImage actualImage; 43 QImage baselineImage; 44 45 while (fgets(buffer, sizeof(buffer), stdin)) { 46 // remove the CR 47 char* newLineCharacter = strchr(buffer, '\n'); 48 if (newLineCharacter) 49 *newLineCharacter = '\0'; 50 51 if (!strncmp("Content-Length: ", buffer, 16)) { 52 strtok(buffer, " "); 53 int imageSize = strtol(strtok(0, " "), 0, 10); 54 55 if (imageSize <= 0) { 56 fputs("error, image size must be specified.\n", stdout); 57 } else { 58 unsigned char buffer[2048]; 59 QBuffer data; 60 61 // Read all the incoming chunks 62 data.open(QBuffer::WriteOnly); 63 while (imageSize > 0) { 64 size_t bytesToRead = qMin(imageSize, 2048); 65 size_t bytesRead = fread(buffer, 1, bytesToRead, stdin); 66 data.write(reinterpret_cast<const char*>(buffer), bytesRead); 67 imageSize -= static_cast<int>(bytesRead); 68 } 69 70 // Convert into QImage 71 QImage decodedImage; 72 decodedImage.loadFromData(data.data(), "PNG"); 73 decodedImage.convertToFormat(QImage::Format_ARGB32); 74 75 // Place it in the right place 76 if (actualImage.isNull()) 77 actualImage = decodedImage; 78 else 79 baselineImage = decodedImage; 80 } 81 } 82 83 if (!actualImage.isNull() && !baselineImage.isNull()) { 84 85 if (actualImage.size() != baselineImage.size()) { 86 fprintf(stderr, "error, test and reference image have different properties.\n"); 87 fflush(stderr); 88 } else { 89 90 int w = actualImage.width(); 91 int h = actualImage.height(); 92 QImage diffImage(w, h, QImage::Format_ARGB32); 93 94 int count = 0; 95 qreal sum = 0; 96 qreal maxDistance = 0; 97 98 for (int x = 0; x < w; ++x) 99 for (int y = 0; y < h; ++y) { 100 QRgb pixel = actualImage.pixel(x, y); 101 QRgb basePixel = baselineImage.pixel(x, y); 102 qreal red = (qRed(pixel) - qRed(basePixel)) / static_cast<float>(qMax(255 - qRed(basePixel), qRed(basePixel))); 103 qreal green = (qGreen(pixel) - qGreen(basePixel)) / static_cast<float>(qMax(255 - qGreen(basePixel), qGreen(basePixel))); 104 qreal blue = (qBlue(pixel) - qBlue(basePixel)) / static_cast<float>(qMax(255 - qBlue(basePixel), qBlue(basePixel))); 105 qreal alpha = (qAlpha(pixel) - qAlpha(basePixel)) / static_cast<float>(qMax(255 - qAlpha(basePixel), qAlpha(basePixel))); 106 qreal distance = qSqrt(red * red + green * green + blue * blue + alpha * alpha) / 2.0f; 107 int gray = distance * qreal(255); 108 diffImage.setPixel(x, y, qRgb(gray, gray, gray)); 109 if (distance >= 1 / qreal(255)) { 110 count++; 111 sum += distance; 112 maxDistance = qMax(maxDistance, distance); 113 } 114 } 115 116 qreal difference = 0; 117 if (count) 118 difference = 100 * sum / static_cast<qreal>(w * h); 119 if (difference <= tolerance) { 120 difference = 0; 121 } else { 122 difference = qRound(difference * 100) / 100; 123 difference = qMax(difference, qreal(0.01)); 124 } 125 126 if (!count) { 127 fprintf(stdout, "diff: %01.2f%% passed\n", difference); 128 } else { 129 QBuffer buffer; 130 buffer.open(QBuffer::WriteOnly); 131 diffImage.save(&buffer, "PNG"); 132 buffer.close(); 133 const QByteArray &data = buffer.data(); 134 printf("Content-Length: %lu\n", static_cast<unsigned long>(data.length())); 135 136 // We have to use the return value of fwrite to avoid "ignoring return value" gcc warning 137 // See https://bugs.webkit.org/show_bug.cgi?id=45384 for details. 138 if (fwrite(data.constData(), 1, data.length(), stdout)) {} 139 140 fprintf(stdout, "diff: %01.2f%% failed\n", difference); 141 } 142 143 fflush(stdout); 144 } 145 actualImage = QImage(); 146 baselineImage = QImage(); 147 } 148 } 149 150 return 0; 151 } 152
