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/*
* Copyright 2012, 2013 Kai Pastor
*
* This file is part of OpenOrienteering.
*
* OpenOrienteering is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenOrienteering is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenOrienteering. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qpainter_t.h"
#include <Qt>
#include <QtTest>
#include <QRgb>
#include "core/image_transparency_fixup.h"
using namespace OpenOrienteering;
QPainterTest::QPainterTest(QObject* parent)
: QObject(parent),
white_img(makeImage(Qt::white)),
black_img(makeImage(Qt::black)),
trans_img(makeImage(Qt::transparent))
{
// nothing
}
void QPainterTest::initTestCase()
{
QCOMPARE(white_img.pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(trans_img.pixel(0,0), qRgba(0, 0, 0, 0));
QCOMPARE(black_img.pixel(0,0), qRgba(0, 0, 0, 255));
}
void QPainterTest::sourceOverCompostion()
{
const QPainter::CompositionMode source_over = QPainter::CompositionMode_SourceOver;
QCOMPARE(compose(white_img, black_img, source_over).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(black_img, white_img, source_over).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(white_img, trans_img, source_over).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(trans_img, white_img, source_over).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(black_img, trans_img, source_over).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(trans_img, black_img, source_over).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(white_img, white_img, source_over).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(black_img, black_img, source_over).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(trans_img, trans_img, source_over).pixel(0,0), qRgba(0, 0, 0, 0));
}
void QPainterTest::multiplyComposition()
{
const QPainter::CompositionMode multiply = QPainter::CompositionMode_Multiply;
QCOMPARE(compose(white_img, black_img, multiply).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(black_img, white_img, multiply).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(white_img, trans_img, multiply).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(trans_img, white_img, multiply).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(black_img, trans_img, multiply).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(trans_img, black_img, multiply).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(white_img, white_img, multiply).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(black_img, black_img, multiply).pixel(0,0), qRgba(0, 0, 0, 255));
#if QT_VERSION < QT_VERSION_CHECK(5, 15, 9) || (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0) && QT_VERSION < QT_VERSION_CHECK(6, 2, 4))
QEXPECT_FAIL("", "CompositionMode_Multiply incorrectly composes full transparency.", Continue);
#endif
QCOMPARE(compose(trans_img, trans_img, multiply).pixel(0,0), qRgba(0, 0, 0, 0));
// ImageTransparencyFixup fixes the particular issue.
QImage result = compose(trans_img, trans_img, multiply);
ImageTransparencyFixup fixup(&result);
fixup();
QCOMPARE(result.pixel(0,0), qRgba(0, 0, 0, 0)); // Now correct!
}
void QPainterTest::darkenComposition()
{
const QPainter::CompositionMode darken = QPainter::CompositionMode_Darken;
QCOMPARE(compose(white_img, black_img, darken).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(black_img, white_img, darken).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(white_img, trans_img, darken).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(trans_img, white_img, darken).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(black_img, trans_img, darken).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(trans_img, black_img, darken).pixel(0,0), qRgba(0, 0, 0, 255));
QCOMPARE(compose(white_img, white_img, darken).pixel(0,0), qRgba(255, 255, 255, 255));
QCOMPARE(compose(black_img, black_img, darken).pixel(0,0), qRgba(0, 0, 0, 255));
#if QT_VERSION < QT_VERSION_CHECK(5, 15, 9) || (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0) && QT_VERSION < QT_VERSION_CHECK(6, 2, 4))
QEXPECT_FAIL("", "CompositionMode_Darken incorrectly composes full transparency.", Continue);
#endif
QCOMPARE(compose(trans_img, trans_img, darken).pixel(0,0), qRgba(0, 0, 0, 0));
// ImageTransparencyFixup fixes the particular issue.
QImage result = compose(trans_img, trans_img, darken);
ImageTransparencyFixup fixup(&result);
fixup();
QCOMPARE(result.pixel(0,0), qRgba(0, 0, 0, 0)); // Now correct!
}
template <typename ColorT>
QImage QPainterTest::makeImage(ColorT color) const
{
QImage image(1, 1, QImage::Format_ARGB32_Premultiplied);
image.fill(color);
return image;
}
QImage QPainterTest::compose(const QImage& source, const QImage& dest, QPainter::CompositionMode mode)
{
QImage result = dest;
QPainter painter(&result);
painter.setCompositionMode(mode);
painter.drawImage(0, 0, source);
painter.end();
return result;
}
QTEST_GUILESS_MAIN(QPainterTest)
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