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 <QApplication> 21 #include <QBuffer> 22 #include <QByteArray> 23 #include <QImage> 24 #include <QStringList> 25 26 #include <math.h> 27 #include <stdio.h> 28 29 int main(int argc, char* argv[]) 30 { 31 QCoreApplication app(argc, argv); 32 33 qreal tolerance = 0; 34 35 QStringList args = app.arguments(); 36 for (int i = 0; i < argc; ++i) 37 if (args[i] == "-t" || args[i] == "--tolerance") 38 tolerance = args[i + 1].toDouble(); 39 40 char buffer[2048]; 41 QImage actualImage; 42 QImage baselineImage; 43 44 while (fgets(buffer, sizeof(buffer), stdin)) { 45 // remove the CR 46 char* newLineCharacter = strchr(buffer, '\n'); 47 if (newLineCharacter) 48 *newLineCharacter = '\0'; 49 50 if (!strncmp("Content-Length: ", buffer, 16)) { 51 strtok(buffer, " "); 52 int imageSize = strtol(strtok(0, " "), 0, 10); 53 54 if (imageSize <= 0) { 55 fputs("error, image size must be specified.\n", stdout); 56 } else { 57 unsigned char buffer[2048]; 58 QBuffer data; 59 60 // Read all the incoming chunks 61 data.open(QBuffer::WriteOnly); 62 while (imageSize > 0) { 63 size_t bytesToRead = qMin(imageSize, 2048); 64 size_t bytesRead = fread(buffer, 1, bytesToRead, stdin); 65 data.write(reinterpret_cast<const char*>(buffer), bytesRead); 66 imageSize -= static_cast<int>(bytesRead); 67 } 68 69 // Convert into QImage 70 QImage decodedImage; 71 decodedImage.loadFromData(data.data(), "PNG"); 72 decodedImage.convertToFormat(QImage::Format_ARGB32); 73 74 // Place it in the right place 75 if (actualImage.isNull()) 76 actualImage = decodedImage; 77 else 78 baselineImage = decodedImage; 79 } 80 } 81 82 if (!actualImage.isNull() && !baselineImage.isNull()) { 83 84 if (actualImage.size() != baselineImage.size()) { 85 fprintf(stderr, "error, test and reference image have different properties.\n"); 86 fflush(stderr); 87 } else { 88 89 int w = actualImage.width(); 90 int h = actualImage.height(); 91 QImage diffImage(w, h, QImage::Format_ARGB32); 92 93 int count = 0; 94 qreal sum = 0; 95 qreal maxDistance = 0; 96 97 for (int x = 0; x < w; ++x) 98 for (int y = 0; y < h; ++y) { 99 QRgb pixel = actualImage.pixel(x, y); 100 QRgb basePixel = baselineImage.pixel(x, y); 101 qreal red = (qRed(pixel) - qRed(basePixel)) / static_cast<float>(qMax(255 - qRed(basePixel), qRed(basePixel))); 102 qreal green = (qGreen(pixel) - qGreen(basePixel)) / static_cast<float>(qMax(255 - qGreen(basePixel), qGreen(basePixel))); 103 qreal blue = (qBlue(pixel) - qBlue(basePixel)) / static_cast<float>(qMax(255 - qBlue(basePixel), qBlue(basePixel))); 104 qreal alpha = (qAlpha(pixel) - qAlpha(basePixel)) / static_cast<float>(qMax(255 - qAlpha(basePixel), qAlpha(basePixel))); 105 qreal distance = sqrt(red * red + green * green + blue * blue + alpha * alpha) / 2.0f; 106 int gray = distance * qreal(255); 107 diffImage.setPixel(x, y, qRgb(gray, gray, gray)); 108 if (distance >= 1 / qreal(255)) { 109 count++; 110 sum += distance; 111 maxDistance = qMax(maxDistance, distance); 112 } 113 } 114 115 qreal difference = 0; 116 if (count) 117 difference = 100 * sum / static_cast<qreal>(w * h); 118 if (difference <= tolerance) { 119 difference = 0; 120 } else { 121 difference = round(difference * 100) / 100; 122 difference = qMax(difference, qreal(0.01)); 123 } 124 125 if (!count) { 126 fprintf(stdout, "diff: %01.2f%% passed\n", difference); 127 } else { 128 QBuffer buffer; 129 buffer.open(QBuffer::WriteOnly); 130 diffImage.save(&buffer, "PNG"); 131 buffer.close(); 132 const QByteArray &data = buffer.data(); 133 printf("Content-Length: %lu\n", static_cast<unsigned long>(data.length())); 134 fwrite(data.constData(), 1, data.length(), stdout); 135 136 fprintf(stdout, "diff: %01.2f%% failed\n", difference); 137 } 138 139 fflush(stdout); 140 } 141 } 142 } 143 144 return 0; 145 } 146
