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
main(int argc,char * argv[])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