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/*
Gwenview: an image viewer
Copyright 2007 Aurélien Gâteau <agateau@kde.org>
This program 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 2
of the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <qtest_kde.h>
#include "imagescalertest.moc"
#include "../lib/imagescaler.h"
#include "../lib/document/documentfactory.h"
#include "testutils.h"
QTEST_KDEMAIN( ImageScalerTest, GUI )
using namespace Gwenview;
static void waitUntilMetaInfoLoaded(Document::Ptr doc) {
while (doc->loadingState() < Document::MetaInfoLoaded) {
QTest::qWait(100);
}
}
/**
* Scale whole image in one pass
*/
void ImageScalerTest::testScaleFullImage() {
const qreal zoom = 2;
KUrl url = urlForTestFile("test.png");
Document::Ptr doc = DocumentFactory::instance()->load(url);
ImageScaler scaler;
ImageScalerClient client(&scaler);
scaler.setDocument(doc);
scaler.setZoom(zoom);
// FIXME: Load full image for now, because ImageScalerClient does not wait
// when ImageScaler request a full image to be loaded asynchronously.
doc->startLoadingFullImage();
doc->waitUntilLoaded();
scaler.setDestinationRegion(QRect(QPoint(0,0), doc->size() * zoom));
QImage scaledImage = client.createFullImage();
QCOMPARE(doc->loadingState(), Document::Loaded);
QImage expectedImage = doc->image().scaled( doc->size() * zoom);
QCOMPARE(scaledImage, expectedImage);
}
#if 0
/**
* Scale parts of an image
* In this test, the result image should be missing its bottom-right corner
*/
void ImageScalerTest::testScalePartialImage() {
QImage image(10, 10, QImage::Format_ARGB32);
const int zoom = 2;
{
QPainter painter(&image);
painter.fillRect(image.rect(), Qt::white);
painter.drawText(0, image.height(), "X");
}
Gwenview::ImageScaler scaler;
ImageScalerClient client(&scaler);
scaler.setImage(&image);
scaler.setZoom(zoom);
QRegion region;
region |= QRect(
0, 0,
image.width() * zoom / 2, image.height() * zoom);
region |= QRect(
0, 0,
image.width() * zoom, image.height() * zoom / 2);
scaler.setDestinationRegion(region);
QImage expectedImage(image.size() * zoom, image.format());
expectedImage.fill(0);
{
QPainter painter(&expectedImage);
QImage tmp;
tmp= image.copy(0, 0,
expectedImage.width() / zoom / 2,
expectedImage.height() / zoom);
painter.drawImage(0, 0, tmp.scaled(tmp.size() * zoom));
tmp= image.copy(0, 0,
expectedImage.width() / zoom,
expectedImage.height() / zoom / 2);
painter.drawImage(0, 0, tmp.scaled(tmp.size() * zoom));
}
QImage scaledImage = client.createFullImage();
QCOMPARE(scaledImage, expectedImage);
}
/**
* Scale whole image in two passes, not using exact pixel boundaries
*/
void ImageScalerTest::testScaleFullImageTwoPasses() {
QFETCH(qreal, zoom);
QImage image(10, 10, QImage::Format_ARGB32);
{
QPainter painter(&image);
painter.fillRect(image.rect(), Qt::white);
painter.drawLine(0, 0, image.width(), image.height());
}
Gwenview::ImageScaler scaler;
ImageScalerClient client(&scaler);
scaler.setImage(&image);
scaler.setZoom(zoom);
int zWidth = int(image.width() * zoom);
int zHeight = int(image.width() * zoom);
int partialZWidth = zWidth / 3;
scaler.setDestinationRegion(
QRect(
0, 0,
partialZWidth, zHeight)
);
scaler.setDestinationRegion(
QRect(
partialZWidth, 0,
zWidth - partialZWidth, zHeight)
);
QImage expectedImage = image.scaled(image.size() * zoom);
QImage scaledImage = client.createFullImage();
QCOMPARE(expectedImage, scaledImage);
}
void ImageScalerTest::testScaleFullImageTwoPasses_data() {
QTest::addColumn<qreal>("zoom");
QTest::newRow("0.5") << 0.5;
QTest::newRow("2.0") << 2.0;
QTest::newRow("4.0") << 4.0;
}
/**
* When zooming out, make sure that we don't crash when scaling an area which
* have one dimension smaller than one pixel in the destination.
*/
void ImageScalerTest::testScaleThinArea() {
QImage image(10, 10, QImage::Format_ARGB32);
image.fill(0);
Gwenview::ImageScaler scaler;
const qreal zoom = 0.25;
scaler.setImage(&image);
scaler.setZoom(zoom);
scaler.setDestinationRegion(QRect(0, 0, image.width(), 2));
}
/**
* Test instantiating a scaler without setting an image won't crash
*/
void ImageScalerTest::testDontCrashWithoutImage() {
Gwenview::ImageScaler scaler;
scaler.setZoom(1.0);
scaler.setDestinationRegion(QRect(0, 0, 10, 10));
}
/**
* Test that scaling down a big image (==bigger than MAX_CHUNK_AREA) does not
* produce any gap
*/
void ImageScalerTest::testScaleDownBigImage() {
QImage image(1704, 2272, QImage::Format_RGB32);
image.fill(255);
Gwenview::ImageScaler scaler;
ImageScalerClient client(&scaler);
const qreal zoom = 0.28125;
scaler.setImage(&image);
scaler.setZoom(zoom);
scaler.setDestinationRegion(QRect( QPoint(0, 0), image.size() * zoom));
QImage scaledImage = client.createFullImage();
QImage expectedImage = image.scaled(scaledImage.size());
QCOMPARE(expectedImage, scaledImage);
}
#endif
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