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Commit 35b46560 authored by Arjen Hiemstra's avatar Arjen Hiemstra Committed by Nate Graham
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Remove ImageScaler 

This seeems to have only been used by RasterImageView and now even that
no longer uses is, so remove it.
parent ab7ae240
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lib/CMakeLists.txt
View file @ 35b46560
......@@ -99,7 +99,6 @@ set(gwenviewlib_SRCS
hud/hudwidget.cpp
graphicswidgetfloater.cpp
imagemetainfomodel.cpp
imagescaler.cpp
imageutils.cpp
invisiblebuttongroup.cpp
iodevicejpegsourcemanager.cpp
......
lib/documentview/rasterimageview.cpp
View file @ 35b46560
......@@ -23,7 +23,6 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA
// Local
#include <lib/documentview/abstractrasterimageviewtool.h>
#include <lib/imagescaler.h>
#include <lib/cms/cmsprofile.h>
#include <lib/gvdebug.h>
#include <lib/paintutils.h>
......
lib/imagescaler.cpp deleted 100644 → 0
View file @ ab7ae240
/*
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 "imagescaler.h"
// Qt
#include <QImage>
#include <QRegion>
#include <QApplication>
// KF
// Local
#include "gwenview_lib_debug.h"
#include <lib/document/document.h>
#include <lib/paintutils.h>
#undef ENABLE_LOG
#undef LOG
//#define ENABLE_LOG
#ifdef ENABLE_LOG
#define LOG(x) qCDebug(GWENVIEW_LIB_LOG) << x
#else
#define LOG(x) ;
#endif
namespace Gwenview
{
// Amount of pixels to keep so that smooth scale is correct
static const int SMOOTH_MARGIN = 3;
static inline QRectF scaledRect(const QRectF& rect, qreal factor)
{
return QRectF(rect.x() * factor,
rect.y() * factor,
rect.width() * factor,
rect.height() * factor);
}
static inline QRect scaledRect(const QRect& rect, qreal factor)
{
return scaledRect(QRectF(rect), factor).toAlignedRect();
}
struct ImageScalerPrivate
{
Qt::TransformationMode mTransformationMode;
Document::Ptr mDocument;
qreal mZoom;
QRegion mRegion;
};
ImageScaler::ImageScaler(QObject* parent)
: QObject(parent)
, d(new ImageScalerPrivate)
{
d->mTransformationMode = Qt::FastTransformation;
d->mZoom = 0;
}
ImageScaler::~ImageScaler()
{
delete d;
}
void ImageScaler::setDocument(const Document::Ptr &document)
{
if (d->mDocument) {
disconnect(d->mDocument.data(), nullptr, this, nullptr);
}
d->mDocument = document;
// Used when scaler asked for a down-sampled image
connect(d->mDocument.data(), &Document::downSampledImageReady,
this, &ImageScaler::doScale);
// Used when scaler asked for a full image
connect(d->mDocument.data(), &Document::loaded,
this, &ImageScaler::doScale);
}
void ImageScaler::setZoom(qreal zoom)
{
// If we zoom to 400% or more, then assume the user wants to see the real
// pixels, for example to fine tune a crop operation
d->mTransformationMode = zoom < 4. ? Qt::SmoothTransformation
: Qt::FastTransformation;
d->mZoom = zoom;
}
void ImageScaler::setDestinationRegion(const QRegion& region)
{
LOG(region);
d->mRegion = region;
if (d->mRegion.isEmpty()) {
return;
}
if (d->mDocument && d->mZoom > 0) {
doScale();
}
}
void ImageScaler::doScale()
{
if (d->mZoom < Document::maxDownSampledZoom()) {
if (!d->mDocument->prepareDownSampledImageForZoom(d->mZoom)) {
LOG("Asked for a down sampled image");
return;
}
} else if (d->mDocument->image().isNull()) {
LOG("Asked for the full image");
d->mDocument->startLoadingFullImage();
return;
}
LOG("Starting");
for (const QRect &rect : qAsConst(d->mRegion)) {
LOG(rect);
scaleRect(rect);
}
LOG("Done");
}
void ImageScaler::scaleRect(const QRect& rect)
{
const qreal dpr = qApp->devicePixelRatio();
// variables prefixed with dp are in device pixels
const QRect dpRect = Gwenview::scaledRect(rect, dpr);
const qreal REAL_DELTA = 0.001;
if (qAbs(d->mZoom - 1.0) < REAL_DELTA) {
QImage tmp = d->mDocument->image().copy(dpRect);
tmp.setDevicePixelRatio(dpr);
emit scaledRect(rect.left(), rect.top(), tmp);
return;
}
QImage image;
qreal zoom;
if (d->mZoom < Document::maxDownSampledZoom()) {
image = d->mDocument->downSampledImageForZoom(d->mZoom);
Q_ASSERT(!image.isNull());
qreal zoom1 = qreal(image.width()) / d->mDocument->width();
zoom = d->mZoom / zoom1;
} else {
image = d->mDocument->image();
zoom = d->mZoom;
}
const QRect imageRect = Gwenview::scaledRect(image.rect(), 1.0 / dpr);
// If rect contains "half" pixels, make sure sourceRect includes them
QRectF sourceRectF = Gwenview::scaledRect(QRectF(rect), 1.0 / zoom);
sourceRectF = sourceRectF.intersected(imageRect);
QRect sourceRect = sourceRectF.toAlignedRect();
if (sourceRect.isEmpty()) {
return;
}
// Compute smooth margin
bool needsSmoothMargins = d->mTransformationMode == Qt::SmoothTransformation;
int sourceLeftMargin, sourceRightMargin, sourceTopMargin, sourceBottomMargin;
int destLeftMargin, destRightMargin, destTopMargin, destBottomMargin;
if (needsSmoothMargins) {
sourceLeftMargin = qMin(sourceRect.left(), SMOOTH_MARGIN);
sourceTopMargin = qMin(sourceRect.top(), SMOOTH_MARGIN);
sourceRightMargin = qMin(imageRect.right() - sourceRect.right(), SMOOTH_MARGIN);
sourceBottomMargin = qMin(imageRect.bottom() - sourceRect.bottom(), SMOOTH_MARGIN);
sourceRect.adjust(
-sourceLeftMargin,
-sourceTopMargin,
sourceRightMargin,
sourceBottomMargin);
destLeftMargin = int(sourceLeftMargin * zoom);
destTopMargin = int(sourceTopMargin * zoom);
destRightMargin = int(sourceRightMargin * zoom);
destBottomMargin = int(sourceBottomMargin * zoom);
} else {
sourceLeftMargin = sourceRightMargin = sourceTopMargin = sourceBottomMargin = 0;
destLeftMargin = destRightMargin = destTopMargin = destBottomMargin = 0;
}
// destRect is almost like rect, but it contains only "full" pixels
QRect destRect = Gwenview::scaledRect(sourceRect, zoom);
QRect dpSourceRect = Gwenview::scaledRect(sourceRect, dpr);
QRect dpDestRect = Gwenview::scaledRect(dpSourceRect, zoom);
QImage tmp;
tmp = image.copy(dpSourceRect);
tmp = tmp.scaled(
dpDestRect.width(),
dpDestRect.height(),
Qt::IgnoreAspectRatio, // Do not use KeepAspectRatio, it can lead to skipped rows or columns
d->mTransformationMode);
if (needsSmoothMargins) {
tmp = tmp.copy(
destLeftMargin * dpr, destTopMargin * dpr,
dpDestRect.width() - (destLeftMargin + destRightMargin) * dpr,
dpDestRect.height() - (destTopMargin + destBottomMargin) * dpr
);
}
tmp.setDevicePixelRatio(dpr);
emit scaledRect(destRect.left() + destLeftMargin, destRect.top() + destTopMargin, tmp);
}
} // namespace
lib/imagescaler.h deleted 100644 → 0
View file @ ab7ae240
/*
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.
*/
#ifndef IMAGESCALER_H
#define IMAGESCALER_H
// Qt
#include <QObject>
// KF
// local
#include <lib/gwenviewlib_export.h>
#include <document/document.h>
class QImage;
class QRect;
class QRegion;
namespace Gwenview
{
class Document;
struct ImageScalerPrivate;
class GWENVIEWLIB_EXPORT ImageScaler : public QObject
{
Q_OBJECT
public:
explicit ImageScaler(QObject* parent = nullptr);
~ImageScaler() override;
void setDocument(const Document::Ptr&);
void setZoom(qreal);
void setDestinationRegion(const QRegion&);
Q_SIGNALS:
void scaledRect(int left, int top, const QImage&);
private:
ImageScalerPrivate * const d;
void scaleRect(const QRect&);
private Q_SLOTS:
void doScale();
};
} // namespace
#endif /* IMAGESCALER_H */
tests/auto/CMakeLists.txt
View file @ 35b46560
......@@ -26,7 +26,6 @@ include_directories(
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR})
gv_add_unit_test(imagescalertest testutils.cpp)
if (KF5KDcraw_FOUND)
gv_add_unit_test(documenttest testutils.cpp)
endif()
......
tests/auto/imagescalertest.cpp deleted 100644 → 0
View file @ ab7ae240
/*
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>
#include "imagescalertest.h"
#include "../lib/document/documentfactory.h"
#include "testutils.h"
QTEST_MAIN(ImageScalerTest)
using namespace Gwenview;
/**
* Scale whole image in one pass
*/
void ImageScalerTest::testScaleFullImage()
{
const qreal zoom = 2;
QUrl url = urlForTestFile("test.png");
Document::Ptr doc = DocumentFactory::instance()->load(url);
// Wait for meta info because we need the document size
while (doc->loadingState() < Document::MetaInfoLoaded) {
QTest::qWait(500);
}
ImageScaler scaler;
ImageScalerClient client(&scaler);
scaler.setDocument(doc);
scaler.setZoom(zoom);
scaler.setDestinationRegion(QRect(QPoint(0, 0), doc->size() * zoom));
QSignalSpy spy(&scaler, SIGNAL(scaledRect(int,int,QImage)));
bool ok = spy.wait(30);
QVERIFY2(ok, "ImageScaler did not emit scaledRect() signal in time");
// Document should be fully loaded by the time image scaler is done
QCOMPARE(doc->loadingState(), Document::Loaded);
QImage scaledImage = client.createFullImage();
QImage expectedImage = doc->image().scaled(doc->size() * zoom,
Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
QVERIFY(TestUtils::imageCompare(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
tests/auto/imagescalertest.h deleted 100644 → 0
View file @ ab7ae240
/*
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.
*/
#ifndef IMAGESCALERTEST_H
#define IMAGESCALERTEST_H
#include "../lib/imagescaler.h"
// Qt
#include <QImage>
#include <QPainter>
#include <QDebug>
// KF
class ImageScalerClient : public QObject
{
Q_OBJECT
public:
ImageScalerClient(Gwenview::ImageScaler* scaler)
{
connect(scaler, &Gwenview::ImageScaler::scaledRect,
this, &ImageScalerClient::slotScaledRect);
}
struct ImageInfo
{
int left;
int top;
QImage image;
};
QVector<ImageInfo> mImageInfoList;
QImage createFullImage()
{
Q_ASSERT(mImageInfoList.size() > 0);
QImage::Format format = mImageInfoList[0].image.format();
int imageWidth = 0;
int imageHeight = 0;
for (const ImageInfo & info : qAsConst(mImageInfoList)) {
int right = info.left + info.image.width();
int bottom = info.top + info.image.height();
imageWidth = qMax(imageWidth, right);
imageHeight = qMax(imageHeight, bottom);
}
QImage image(imageWidth, imageHeight, format);
image.fill(0);
QPainter painter(&image);
for (const ImageInfo & info : qAsConst(mImageInfoList)) {
painter.drawImage(info.left, info.top, info.image);
}
return image;
}
public Q_SLOTS:
void slotScaledRect(int left, int top, const QImage& image)
{
ImageInfo info;
info.left = left;
info.top = top;
info.image = image;
mImageInfoList.append(info);
}
};
class ImageScalerTest : public QObject
{
Q_OBJECT
private Q_SLOTS:
void testScaleFullImage();