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Diffstat (limited to 'tests/shared/compareimage.cpp')
| -rw-r--r-- | tests/shared/compareimage.cpp | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/tests/shared/compareimage.cpp b/tests/shared/compareimage.cpp deleted file mode 100644 index 74bf95db..00000000 --- a/tests/shared/compareimage.cpp +++ /dev/null @@ -1,165 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtQuick3D module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this -** file. Please review the following information to ensure the GNU Lesser -** General Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "compareimage.h" - -//#define DEBUG_QIMAGECOMPARE - -#ifdef DEBUG_QIMAGECOMPARE -#include <QDebug> -#endif - -// qProportionDifferentRGBPixels compares two images and returns a float -// between 0.0 and 1.0 indicating the proportion of pixels with a difference -// greater than the relevant threshold in RGB space, where 0.0 indicates that -// every pixel matches, and 1.0 indicates that no pixels match. -// -// For example, the RGB colors 0x0088ff and 0x000000 have a red difference -// of 0, a green difference of 0x88, and a blue difference of 0xff. If any -// of these values is greater than the corresponding threshold, the pixel -// would be considered "different". -// -// If the images are different sizes, the function compares those pixels that -// fall in the overlapping area. If one image is simply smaller than the -// other, this will be the size of the smaller image. - -float qProportionDifferentRGBPixels(const QImage& img1, const QImage& img2, int redThreshold, int greenThreshold, int blueThreshold, int alphaThreshold) -{ - int result = 0; - - int width = qMin(img1.width(), img2.width()); - int height = qMin(img1.height(), img2.height()); - int pixelcount = 0; - -#ifdef DEBUG_QIMAGECOMPARE - int sumDiff = 0; - QImage *resultImage = new QImage (width,height,QImage::Format_RGB16); -#endif - - - for (int y = 0; y < height; y++) - { - for (int x = 0; x < width; x++) - { - QColor pix1 = img1.pixel(x,y); - QColor pix2 = img2.pixel(x,y); - int redDiff = qMax(pix1.red(),pix2.red()) - qMin(pix1.red(),pix2.red()); - int greenDiff = qMax(pix1.green(),pix2.green()) - qMin(pix1.green(),pix2.green()); - int blueDiff = qMax(pix1.blue(),pix2.blue()) - qMin(pix1.blue(),pix2.blue()); - int alphaDiff = qMax(pix1.alpha(),pix2.alpha()) - qMin(pix1.alpha(),pix2.alpha()); - -#ifdef DEBUG_QIMAGECOMPARE - QColor colorDiff; - colorDiff.setRed(redDiff); - colorDiff.setGreen(greenDiff); - colorDiff.setBlue(blueDiff); - colorDiff.setAlpha(255-alphaDiff); - sumDiff += redDiff+greenDiff+blueDiff; -#endif - - pixelcount++; - if (redDiff > redThreshold - || greenDiff > greenThreshold - || blueDiff > blueThreshold - || alphaDiff > alphaThreshold) - { - result++; -#ifdef DEBUG_QIMAGECOMPARE - resultImage->setPixel(x,y, colorDiff.rgba()); -#endif - } - } - } -#ifdef DEBUG_QIMAGECOMPARE - qDebug() << "qimageCompare result was: " << result << "/"<<pixelcount<<" = "<< (int)(((float)result/(float)pixelcount)*100) << "%"; - qDebug() << "Sum of absolute differences was:"<< sumDiff; - qDebug() << "Average difference per pixel was:" << (float)sumDiff/(float)pixelcount; -#endif - return (float)result/(float)pixelcount; -}; - - - -inline float qProportionDifferentRGBPixels(const QImage& img1, const QImage& img2, int threshold ) -{ - return qProportionDifferentRGBPixels(img1, img2, threshold, threshold, threshold); -} - -bool qFuzzyCompare(const QImage& img1, const QImage& img2) -{ - // The two images must have the same size. - if (img1.width() != img2.width() || img1.height() != img2.height()) - return false; - - - int count = 0; - for (int y = 0; y < img1.height(); ++y) { - for (int x = 0; x < img1.width(); ++x) { - // Compare the top two bits of the red, green, and blue - // values for equality. This should factor out rounding - // errors due to 16-bit vs 32-bit conversions and so on. - // We assume that the source images use primary colors. - if ((img1.pixel(x, y) & 0x00C0C0C0) == (img2.pixel(x, y) & 0x00C0C0C0)) - ++count; - } - } - - // We consider the images the same if at least 95% of the - // pixels have the same or very similar RGB values. - - // 64 is a rough approximation of bitwise & 0xC0 - return qProportionDifferentRGBPixels(img1, img2, 64) <= 0.05001; - //return (count >= (img1.width() * img1.height() * 95 / 100)); -} - -bool qFuzzyCompare(const QImage& img1, const QColor& color) -{ - int count = 0; - for (int y = 0; y < img1.height(); ++y) { - for (int x = 0; x < img1.width(); ++x) { - if ((img1.pixel(x, y) & 0x00C0C0C0) == (color.rgb() & 0x00C0C0C0)) - ++count; - } - } - return (count >= (img1.width() * img1.height() * 95 / 100)); -} - - |