File indexing completed on 2024-06-23 04:31:01

 /*
     SPDX-FileCopyrightText: 2023 g10 Code GmbH
     SPDX-FileContributor: Sune Stolborg Vuorela <sune@vuorela.dk>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #include "imagescaling.h"
 #include <QGuiApplication>
 #include <QImage>
 #include <QTest>
 
 // Tests the image scaling and fit to canvas that is
 // used by the signature element in poppler.
 
 // For this test, we don't care about the quality of the
 // scaling but purely rely on Qt for that. It is mostly a
 // test that we place the input image correctly in returned
 // image
 
 class ImageScalingTest : public QObject
 {
     Q_OBJECT
 private Q_SLOTS:
     void testNoScaling();
     void testNoPaddingEnlarge();
     void testNoPaddingShrink();
     void testPadLeftRight();
     void testPadTopBottom();
 };
 
 void ImageScalingTest::testNoScaling()
 {
     QSize size(5, 5);
     QImage input(size, QImage::Format_ARGB32);
     input.fill(Qt::black);
     QImage output = imagescaling::scaleAndFitCanvas(input, size);
     QImage expected(size, QImage::Format_ARGB32);
     expected.fill(Qt::black);
     QCOMPARE(expected, output);
 }
 
 void ImageScalingTest::testNoPaddingEnlarge()
 {
     QImage input(QSize(10, 10), QImage::Format_ARGB32);
     input.fill(Qt::black);
     QSize size(20, 20);
     QImage output = imagescaling::scaleAndFitCanvas(input, size);
     QImage expected(size, QImage::Format_ARGB32);
     expected.fill(Qt::black);
     QCOMPARE(expected, output);
 }
 
 void ImageScalingTest::testNoPaddingShrink()
 {
     QImage input(QSize(20, 20), QImage::Format_ARGB32);
     input.fill(Qt::black);
     QSize size(10, 10);
     QImage output = imagescaling::scaleAndFitCanvas(input, size);
     QImage expected(size, QImage::Format_ARGB32);
     expected.fill(Qt::black);
     QCOMPARE(expected, output);
 }
 
 void ImageScalingTest::testPadLeftRight()
 {
     QImage input(QSize(5, 5), QImage::Format_ARGB32);
     input.fill(Qt::black);
     QSize size(9, 5);
     QImage output = imagescaling::scaleAndFitCanvas(input, size);
     // check top row
     QCOMPARE(output.pixelColor(0, 0), Qt::transparent);
     QCOMPARE(output.pixelColor(1, 0), Qt::transparent);
     QCOMPARE(output.pixelColor(2, 0), Qt::black);
     QCOMPARE(output.pixelColor(3, 0), Qt::black);
     QCOMPARE(output.pixelColor(4, 0), Qt::black);
     QCOMPARE(output.pixelColor(5, 0), Qt::black);
     QCOMPARE(output.pixelColor(6, 0), Qt::black);
     QCOMPARE(output.pixelColor(7, 0), Qt::transparent);
     QCOMPARE(output.pixelColor(8, 0), Qt::transparent);
     // check columns
     for (int x = 0; x < output.size().width(); x++) {
         QColor top = output.pixelColor(x, 0);
         for (int y = 1; y < output.size().height(); y++) {
             QCOMPARE(output.pixelColor(x, y), top);
         }
     }
 }
 
 void ImageScalingTest::testPadTopBottom()
 {
     QImage input(QSize(5, 5), QImage::Format_ARGB32);
     input.fill(Qt::black);
     QSize size(5, 9);
     QImage output = imagescaling::scaleAndFitCanvas(input, size);
     // check first column
     QCOMPARE(output.pixelColor(0, 0), Qt::transparent);
     QCOMPARE(output.pixelColor(0, 1), Qt::transparent);
     QCOMPARE(output.pixelColor(0, 2), Qt::black);
     QCOMPARE(output.pixelColor(0, 3), Qt::black);
     QCOMPARE(output.pixelColor(0, 4), Qt::black);
     QCOMPARE(output.pixelColor(0, 5), Qt::black);
     QCOMPARE(output.pixelColor(0, 6), Qt::black);
     QCOMPARE(output.pixelColor(0, 7), Qt::transparent);
     QCOMPARE(output.pixelColor(0, 8), Qt::transparent);
     // check rows
     for (int y = 0; y < output.size().height(); y++) {
         QColor first = output.pixelColor(0, y);
         for (int x = 1; x < output.size().width(); x++) {
             QCOMPARE(output.pixelColor(x, y), first);
         }
     }
 }
 
 QTEST_MAIN(ImageScalingTest)
 #include "testimagescaling.moc"
 
 // No need to export it, but we need to be able to call the functions
 #include "imagescaling.cpp"