diff --git a/lib/documentview/rasterimageview.cpp b/lib/documentview/rasterimageview.cpp index 4ef49aec..ba5041f6 100644 --- a/lib/documentview/rasterimageview.cpp +++ b/lib/documentview/rasterimageview.cpp @@ -1,579 +1,577 @@ // vim: set tabstop=4 shiftwidth=4 expandtab: /* Gwenview: an image viewer Copyright 2011 Aurélien Gâteau 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, Cambridge, MA 02110-1301, USA. */ // Self #include "rasterimageview.h" // Local #include #include #include #include #include // KDE // Qt #include #include #include #include #include #include namespace Gwenview { struct RasterImageViewPrivate { RasterImageView* q; ImageScaler* mScaler; bool mEmittedCompleted; // Config AbstractImageView::AlphaBackgroundMode mAlphaBackgroundMode; QColor mAlphaBackgroundColor; cmsUInt32Number mRenderingIntent; - bool mEnlargeSmallerImages; // /Config bool mBufferIsEmpty; QPixmap mCurrentBuffer; // The alternate buffer is useful when scrolling: existing content is copied // to mAlternateBuffer and buffers are swapped. This avoids allocating a new // QPixmap every time the image is scrolled. QPixmap mAlternateBuffer; QTimer* mUpdateTimer; QPointer mTool; bool mApplyDisplayTransform; // Defaults to true. Can be set to false if there is no need or no way to apply color profile cmsHTRANSFORM mDisplayTransform; void updateDisplayTransform(QImage::Format format) { GV_RETURN_IF_FAIL(format != QImage::Format_Invalid); mApplyDisplayTransform = false; if (mDisplayTransform) { cmsDeleteTransform(mDisplayTransform); } mDisplayTransform = nullptr; Cms::Profile::Ptr profile = q->document()->cmsProfile(); if (!profile) { // The assumption that something unmarked is *probably* sRGB is better than failing to apply any transform when one // has a wide-gamut screen. profile = Cms::Profile::getSRgbProfile(); } Cms::Profile::Ptr monitorProfile = Cms::Profile::getMonitorProfile(); if (!monitorProfile) { qWarning() << "Could not get monitor color profile"; return; } cmsUInt32Number cmsFormat = 0; switch (format) { case QImage::Format_RGB32: case QImage::Format_ARGB32: cmsFormat = TYPE_BGRA_8; break; case QImage::Format_Grayscale8: cmsFormat = TYPE_GRAY_8; break; default: qWarning() << "Gwenview can only apply color profile on RGB32 or ARGB32 images"; return; } mDisplayTransform = cmsCreateTransform(profile->handle(), cmsFormat, monitorProfile->handle(), cmsFormat, mRenderingIntent, cmsFLAGS_BLACKPOINTCOMPENSATION); mApplyDisplayTransform = true; } void setupUpdateTimer() { mUpdateTimer = new QTimer(q); mUpdateTimer->setInterval(500); mUpdateTimer->setSingleShot(true); QObject::connect(mUpdateTimer, SIGNAL(timeout()), q, SLOT(updateBuffer())); } void startAnimationIfNecessary() { if (q->document() && q->isVisible()) { q->document()->startAnimation(); } } QRectF mapViewportToZoomedImage(const QRectF& viewportRect) const { return QRectF( viewportRect.topLeft() - q->imageOffset() + q->scrollPos(), viewportRect.size() ); } void setScalerRegionToVisibleRect() { QRectF rect = mapViewportToZoomedImage(q->boundingRect()); mScaler->setDestinationRegion(QRegion(rect.toRect())); } void resizeBuffer() { const auto dpr = q->devicePixelRatio(); QSize size = q->visibleImageSize().toSize(); if (size * dpr == mCurrentBuffer.size()) { return; } if (!size.isValid()) { mAlternateBuffer = QPixmap(); mCurrentBuffer = QPixmap(); return; } mAlternateBuffer = QPixmap(size * dpr); mAlternateBuffer.setDevicePixelRatio(dpr); mAlternateBuffer.fill(Qt::transparent); { QPainter painter(&mAlternateBuffer); painter.drawPixmap(0, 0, mCurrentBuffer); } qSwap(mAlternateBuffer, mCurrentBuffer); mAlternateBuffer = QPixmap(); } void drawAlphaBackground(QPainter* painter, const QRect& viewportRect, const QPoint& zoomedImageTopLeft, const QPixmap &texture) { switch (mAlphaBackgroundMode) { case AbstractImageView::AlphaBackgroundNone: painter->fillRect(viewportRect, Qt::transparent); break; case AbstractImageView::AlphaBackgroundCheckBoard: { const QPoint textureOffset( zoomedImageTopLeft.x() % texture.width(), zoomedImageTopLeft.y() % texture.height()); painter->drawTiledPixmap( viewportRect, texture, textureOffset); break; } case AbstractImageView::AlphaBackgroundSolid: painter->fillRect(viewportRect, mAlphaBackgroundColor); break; default: Q_ASSERT(0); } } }; RasterImageView::RasterImageView(QGraphicsItem* parent) : AbstractImageView(parent) , d(new RasterImageViewPrivate) { d->q = this; d->mEmittedCompleted = false; d->mApplyDisplayTransform = true; d->mDisplayTransform = nullptr; d->mAlphaBackgroundMode = AlphaBackgroundNone; d->mAlphaBackgroundColor = Qt::black; d->mRenderingIntent = INTENT_PERCEPTUAL; - d->mEnlargeSmallerImages = false; d->mBufferIsEmpty = true; d->mScaler = new ImageScaler(this); connect(d->mScaler, &ImageScaler::scaledRect, this, &RasterImageView::updateFromScaler); d->setupUpdateTimer(); } RasterImageView::~RasterImageView() { if (d->mTool) { d->mTool.data()->toolDeactivated(); } if (d->mDisplayTransform) { cmsDeleteTransform(d->mDisplayTransform); } delete d; } void RasterImageView::setAlphaBackgroundMode(AlphaBackgroundMode mode) { d->mAlphaBackgroundMode = mode; if (document() && document()->hasAlphaChannel()) { d->mCurrentBuffer = QPixmap(); updateBuffer(); } } void RasterImageView::setAlphaBackgroundColor(const QColor& color) { d->mAlphaBackgroundColor = color; if (document() && document()->hasAlphaChannel()) { d->mCurrentBuffer = QPixmap(); updateBuffer(); } } void RasterImageView::setRenderingIntent(const RenderingIntent::Enum& renderingIntent) { if (d->mRenderingIntent != renderingIntent) { d->mRenderingIntent = renderingIntent; updateBuffer(); } } void RasterImageView::loadFromDocument() { Document::Ptr doc = document(); if (!doc) { return; } connect(doc.data(), &Document::metaInfoLoaded, this, &RasterImageView::slotDocumentMetaInfoLoaded); connect(doc.data(), &Document::isAnimatedUpdated, this, &RasterImageView::slotDocumentIsAnimatedUpdated); const Document::LoadingState state = doc->loadingState(); if (state == Document::MetaInfoLoaded || state == Document::Loaded) { slotDocumentMetaInfoLoaded(); } } void RasterImageView::slotDocumentMetaInfoLoaded() { if (document()->size().isValid()) { QMetaObject::invokeMethod(this, "finishSetDocument", Qt::QueuedConnection); } else { // Could not retrieve image size from meta info, we need to load the // full image now. connect(document().data(), &Document::loaded, this, &RasterImageView::finishSetDocument); document()->startLoadingFullImage(); } } void RasterImageView::finishSetDocument() { GV_RETURN_IF_FAIL(document()->size().isValid()); d->mScaler->setDocument(document()); d->resizeBuffer(); applyPendingScrollPos(); connect(document().data(), &Document::imageRectUpdated, this, &RasterImageView::updateImageRect); if (zoomToFit()) { // Force the update otherwise if computeZoomToFit() returns 1, setZoom() // will think zoom has not changed and won't update the image setZoom(computeZoomToFit(), QPointF(-1, -1), ForceUpdate); } else if (zoomToFill()) { setZoom(computeZoomToFill(), QPointF(-1, -1), ForceUpdate); } else { // Not only call updateBuffer, but also ensure the initial transformation mode // of the image scaler is set correctly when zoom is unchanged (see Bug 396736). onZoomChanged(); } d->startAnimationIfNecessary(); update(); } void RasterImageView::updateImageRect(const QRect& imageRect) { QRectF viewRect = mapToView(imageRect); if (!viewRect.intersects(boundingRect())) { return; } if (zoomToFit()) { setZoom(computeZoomToFit()); } else if (zoomToFill()) { setZoom(computeZoomToFill()); } else { applyPendingScrollPos(); } d->setScalerRegionToVisibleRect(); update(); emit imageRectUpdated(); } void RasterImageView::slotDocumentIsAnimatedUpdated() { d->startAnimationIfNecessary(); } void RasterImageView::updateFromScaler(int zoomedImageLeft, int zoomedImageTop, const QImage& image) { if (d->mApplyDisplayTransform) { d->updateDisplayTransform(image.format()); if (d->mDisplayTransform) { quint8 *bytes = const_cast(image.bits()); cmsDoTransform(d->mDisplayTransform, bytes, bytes, image.width() * image.height()); } } d->resizeBuffer(); int viewportLeft = zoomedImageLeft - scrollPos().x(); int viewportTop = zoomedImageTop - scrollPos().y(); d->mBufferIsEmpty = false; { QPainter painter(&d->mCurrentBuffer); painter.setCompositionMode(QPainter::CompositionMode_Source); if (document()->hasAlphaChannel()) { d->drawAlphaBackground( &painter, QRect(viewportLeft, viewportTop, image.width(), image.height()), QPoint(zoomedImageLeft, zoomedImageTop), alphaBackgroundTexture() ); // This is required so transparent pixels don't replace our background painter.setCompositionMode(QPainter::CompositionMode_SourceOver); } painter.drawImage(viewportLeft, viewportTop, image); } update(); if (!d->mEmittedCompleted) { d->mEmittedCompleted = true; emit completed(); } } void RasterImageView::onZoomChanged() { d->mScaler->setZoom(zoom()); if (!d->mUpdateTimer->isActive()) { updateBuffer(); } } void RasterImageView::onImageOffsetChanged() { update(); } void RasterImageView::onScrollPosChanged(const QPointF& oldPos) { QPointF delta = scrollPos() - oldPos; // Scroll existing { if (d->mAlternateBuffer.size() != d->mCurrentBuffer.size()) { d->mAlternateBuffer = QPixmap(d->mCurrentBuffer.size()); d->mAlternateBuffer.setDevicePixelRatio(d->mCurrentBuffer.devicePixelRatio()); } d->mAlternateBuffer.fill(Qt::transparent); QPainter painter(&d->mAlternateBuffer); painter.drawPixmap(-delta, d->mCurrentBuffer); } qSwap(d->mCurrentBuffer, d->mAlternateBuffer); // Scale missing parts QRegion bufferRegion = QRect(scrollPos().toPoint(), d->mCurrentBuffer.size() / devicePixelRatio()); QRegion updateRegion = bufferRegion - bufferRegion.translated(-delta.toPoint()); updateBuffer(updateRegion); update(); } void RasterImageView::paint(QPainter* painter, const QStyleOptionGraphicsItem* /*option*/, QWidget* /*widget*/) { d->mCurrentBuffer.setDevicePixelRatio(devicePixelRatio()); QPointF topLeft = imageOffset(); if (zoomToFit()) { // In zoomToFit mode, scale crudely the buffer to fit the screen. This // provide an approximate rendered which will be replaced when the scheduled // proper scale is ready. // Round point and size independently, to keep consistency with the below (non zoomToFit) painting const QRect rect = QRect(topLeft.toPoint(), (dipDocumentSize() * zoom()).toSize()); painter->drawPixmap(rect, d->mCurrentBuffer); } else { painter->drawPixmap(topLeft.toPoint(), d->mCurrentBuffer); } if (d->mTool) { d->mTool.data()->paint(painter); } // Debug #if 0 QSizeF visibleSize = documentSize() * zoom(); painter->setPen(Qt::red); painter->drawRect(topLeft.x(), topLeft.y(), visibleSize.width() - 1, visibleSize.height() - 1); painter->setPen(Qt::blue); painter->drawRect(topLeft.x(), topLeft.y(), d->mCurrentBuffer.width() - 1, d->mCurrentBuffer.height() - 1); #endif } void RasterImageView::resizeEvent(QGraphicsSceneResizeEvent* event) { // If we are in zoomToFit mode and have something in our buffer, delay the // update: paint() will paint a scaled version of the buffer until resizing // is done. This is much faster than rescaling the whole image for each // resize event we receive. // mUpdateTimer must be started before calling AbstractImageView::resizeEvent() // because AbstractImageView::resizeEvent() will call onZoomChanged(), which // will trigger an immediate update unless the mUpdateTimer is active. if ((zoomToFit() || zoomToFill()) && !d->mBufferIsEmpty) { d->mUpdateTimer->start(); } AbstractImageView::resizeEvent(event); if (!zoomToFit() || !zoomToFill()) { // Only update buffer if we are not in zoomToFit mode: if we are // onZoomChanged() will have already updated the buffer. updateBuffer(); } } void RasterImageView::updateBuffer(const QRegion& region) { d->mUpdateTimer->stop(); if (region.isEmpty()) { d->setScalerRegionToVisibleRect(); } else { d->mScaler->setDestinationRegion(region); } } void RasterImageView::setCurrentTool(AbstractRasterImageViewTool* tool) { if (d->mTool) { d->mTool.data()->toolDeactivated(); d->mTool.data()->deleteLater(); } // Go back to default cursor when tool is deactivated. We need to call this here and // not further below in case toolActivated wants to set its own new cursor afterwards. updateCursor(); d->mTool = tool; if (d->mTool) { d->mTool.data()->toolActivated(); } emit currentToolChanged(tool); update(); } AbstractRasterImageViewTool* RasterImageView::currentTool() const { return d->mTool.data(); } void RasterImageView::mousePressEvent(QGraphicsSceneMouseEvent* event) { if (d->mTool) { d->mTool.data()->mousePressEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::mousePressEvent(event); } void RasterImageView::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event) { if (d->mTool) { d->mTool.data()->mouseDoubleClickEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::mouseDoubleClickEvent(event); } void RasterImageView::mouseMoveEvent(QGraphicsSceneMouseEvent* event) { if (d->mTool) { d->mTool.data()->mouseMoveEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::mouseMoveEvent(event); } void RasterImageView::mouseReleaseEvent(QGraphicsSceneMouseEvent* event) { if (d->mTool) { d->mTool.data()->mouseReleaseEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::mouseReleaseEvent(event); } void RasterImageView::wheelEvent(QGraphicsSceneWheelEvent* event) { if (d->mTool) { d->mTool.data()->wheelEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::wheelEvent(event); } void RasterImageView::keyPressEvent(QKeyEvent* event) { if (d->mTool) { d->mTool.data()->keyPressEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::keyPressEvent(event); } void RasterImageView::keyReleaseEvent(QKeyEvent* event) { if (d->mTool) { d->mTool.data()->keyReleaseEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::keyReleaseEvent(event); } void RasterImageView::hoverMoveEvent(QGraphicsSceneHoverEvent* event) { if (d->mTool) { d->mTool.data()->hoverMoveEvent(event); if (event->isAccepted()) { return; } } AbstractImageView::hoverMoveEvent(event); } } // namespace