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28
29#include "visualtestutil.h"
30
31#include <QtQuick/QQuickItem>
32#include <QtCore/QDebug>
33
34bool QQuickVisualTestUtil::delegateVisible(QQuickItem *item)
35{
36 return item->isVisible() && !QQuickItemPrivate::get(item)->culled;
37}
38
39QQuickItem *QQuickVisualTestUtil::findVisibleChild(QQuickItem *parent, const QString &objectName)
40{
41 QQuickItem *item = 0;
42 QList<QQuickItem*> items = parent->findChildren<QQuickItem*>(aName: objectName);
43 for (int i = 0; i < items.count(); ++i) {
44 if (items.at(i)->isVisible() && !QQuickItemPrivate::get(item: items.at(i))->culled) {
45 item = items.at(i);
46 break;
47 }
48 }
49 return item;
50}
51
52void QQuickVisualTestUtil::dumpTree(QQuickItem *parent, int depth)
53{
54 static QString padding(" ");
55 for (int i = 0; i < parent->childItems().count(); ++i) {
56 QQuickItem *item = qobject_cast<QQuickItem*>(object: parent->childItems().at(i));
57 if (!item)
58 continue;
59 qDebug() << padding.left(n: depth*2) << item;
60 dumpTree(parent: item, depth: depth+1);
61 }
62}
63
64// A custom compare function to avoid issues such as:
65// When running on native Nvidia graphics cards on linux, the
66// distance field glyph pixels have a measurable, but not visible
67// pixel error. This was GT-216 with the ubuntu "nvidia-319" driver package.
68// llvmpipe does not show the same issue.
69
70bool QQuickVisualTestUtil::compareImages(const QImage &ia, const QImage &ib, QString *errorMessage)
71{
72 if (ia.size() != ib.size()) {
73 QDebug(errorMessage) << "Images are of different size:" << ia.size() << ib.size()
74 << "DPR:" << ia.devicePixelRatio() << ib.devicePixelRatio();
75 return false;
76 }
77 if (ia.format() != ib.format()) {
78 QDebug(errorMessage) << "Images are of different formats:" << ia.format() << ib.format();
79 return false;
80 }
81
82 int w = ia.width();
83 int h = ia.height();
84 const int tolerance = 5;
85 for (int y=0; y<h; ++y) {
86 const uint *as= (const uint *) ia.constScanLine(y);
87 const uint *bs= (const uint *) ib.constScanLine(y);
88 for (int x=0; x<w; ++x) {
89 uint a = as[x];
90 uint b = bs[x];
91
92 // No tolerance for error in the alpha.
93 if ((a & 0xff000000) != (b & 0xff000000)
94 || qAbs(t: qRed(rgb: a) - qRed(rgb: b)) > tolerance
95 || qAbs(t: qRed(rgb: a) - qRed(rgb: b)) > tolerance
96 || qAbs(t: qRed(rgb: a) - qRed(rgb: b)) > tolerance) {
97 QDebug(errorMessage) << "Mismatch at:" << x << y << ':'
98 << hex << showbase << a << b;
99 return false;
100 }
101 }
102 }
103 return true;
104}
105

source code of qtdeclarative/tests/auto/quick/shared/visualtestutil.cpp