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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commitce4a32fe52ef09d8f5ff1dd22c001110902b60a2 (patch)
tree5ac38a06f3dde268dc7927dc155896926aaf7012 /khtml/rendering/render_image.cpp
downloadtdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.tar.gz
tdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'khtml/rendering/render_image.cpp')
-rw-r--r--khtml/rendering/render_image.cpp604
1 files changed, 604 insertions, 0 deletions
diff --git a/khtml/rendering/render_image.cpp b/khtml/rendering/render_image.cpp
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+++ b/khtml/rendering/render_image.cpp
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+/**
+ * This file is part of the DOM implementation for KDE.
+ *
+ * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ * (C) 1999 Antti Koivisto (koivisto@kde.org)
+ * (C) 2000-2003 Dirk Mueller (mueller@kde.org)
+ * (C) 2003 Apple Computer, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+//#define DEBUG_LAYOUT
+
+#include "render_image.h"
+#include "render_canvas.h"
+
+#include <qdrawutil.h>
+#include <qpainter.h>
+
+#include <kapplication.h>
+#include <kdebug.h>
+#include <kglobalsettings.h>
+
+#include "css/csshelper.h"
+#include "misc/helper.h"
+#include "misc/htmlattrs.h"
+#include "misc/loader.h"
+#include "misc/htmltags.h"
+#include "html/html_formimpl.h"
+#include "html/html_imageimpl.h"
+#include "html/dtd.h"
+#include "xml/dom2_eventsimpl.h"
+#include "html/html_documentimpl.h"
+#include "html/html_objectimpl.h"
+#include "khtmlview.h"
+#include "khtml_part.h"
+#include <math.h>
+
+#include "loading_icon.cpp"
+
+using namespace DOM;
+using namespace khtml;
+
+// -------------------------------------------------------------------------
+
+RenderImage::RenderImage(NodeImpl *_element)
+ : RenderReplaced(_element)
+{
+ m_oldImage = m_cachedImage = 0;
+
+ m_selectionState = SelectionNone;
+ berrorPic = false;
+
+ const KHTMLSettings *settings = _element->getDocument()->view()->part()->settings();
+ bUnfinishedImageFrame = settings->unfinishedImageFrame();
+
+ setIntrinsicWidth( 0 );
+ setIntrinsicHeight( 0 );
+}
+
+RenderImage::~RenderImage()
+{
+ if(m_cachedImage) m_cachedImage->deref( this );
+ if(m_oldImage) m_oldImage->deref( this );
+}
+
+QPixmap RenderImage::pixmap() const
+{
+ return m_cachedImage ? m_cachedImage->pixmap() : QPixmap();
+}
+
+void RenderImage::setStyle(RenderStyle* _style)
+{
+ RenderReplaced::setStyle(_style);
+ // init RenderObject attributes
+ //setOverhangingContents(style()->height().isPercent());
+ setShouldPaintBackgroundOrBorder(true);
+}
+
+void RenderImage::setContentObject(CachedObject* co )
+{
+ if (co && m_cachedImage != co)
+ updateImage( static_cast<CachedImage*>( co ) );
+}
+
+void RenderImage::setPixmap( const QPixmap &p, const QRect& r, CachedImage *o)
+{
+ if ( o == m_oldImage )
+ return;
+
+ if(o != m_cachedImage) {
+ RenderReplaced::setPixmap(p, r, o);
+ return;
+ }
+
+ bool iwchanged = false;
+
+ if(o->isErrorImage()) {
+ int iw = p.width() + 8;
+ int ih = p.height() + 8;
+
+ // we have an alt and the user meant it (its not a text we invented)
+ if ( element() && !alt.isEmpty() && !element()->getAttribute( ATTR_ALT ).isNull()) {
+ const QFontMetrics &fm = style()->fontMetrics();
+ QRect br = fm.boundingRect ( 0, 0, 1024, 256, Qt::AlignAuto|Qt::WordBreak, alt.string() );
+ if ( br.width() > iw )
+ iw = br.width();
+ if ( br.height() > ih )
+ ih = br.height();
+ }
+
+ if ( iw != intrinsicWidth() ) {
+ setIntrinsicWidth( iw );
+ iwchanged = true;
+ }
+ if ( ih != intrinsicHeight() ) {
+ setIntrinsicHeight( ih );
+ iwchanged = true;
+ }
+ if ( element() && element()->id() == ID_OBJECT ) {
+ static_cast<HTMLObjectElementImpl*>( element() )->renderAlternative();
+ return;
+ }
+ }
+ berrorPic = o->isErrorImage();
+
+ bool needlayout = false;
+
+ // Image dimensions have been changed, see what needs to be done
+ if( o->pixmap_size().width() != intrinsicWidth() ||
+ o->pixmap_size().height() != intrinsicHeight() || iwchanged )
+ {
+// qDebug("image dimensions have been changed, old: %d/%d new: %d/%d",
+// intrinsicWidth(), intrinsicHeight(),
+// o->pixmap_size().width(), o->pixmap_size().height());
+
+ if(!o->isErrorImage()) {
+ setIntrinsicWidth( o->pixmap_size().width() );
+ setIntrinsicHeight( o->pixmap_size().height() );
+ }
+
+ // lets see if we need to relayout at all..
+ int oldwidth = m_width;
+ int oldheight = m_height;
+ int oldminwidth = m_minWidth;
+ m_minWidth = 0;
+
+ if ( parent() ) {
+ calcWidth();
+ calcHeight();
+ }
+
+ if(iwchanged || m_width != oldwidth || m_height != oldheight)
+ needlayout = true;
+
+ m_minWidth = oldminwidth;
+ m_width = oldwidth;
+ m_height = oldheight;
+ }
+
+ // we're not fully integrated in the tree yet.. we'll come back.
+ if ( !parent() )
+ return;
+
+ if(needlayout)
+ {
+ if (!selfNeedsLayout())
+ setNeedsLayout(true);
+ if (minMaxKnown())
+ setMinMaxKnown(false);
+ }
+ else
+ {
+ bool completeRepaint = !resizeCache.isNull();
+ int cHeight = contentHeight();
+ int scaledHeight = intrinsicHeight() ? ((o->valid_rect().height()*cHeight)/intrinsicHeight()) : 0;
+
+ // don't bog down X server doing xforms
+ if(completeRepaint && cHeight >= 5 && o->valid_rect().height() < intrinsicHeight() &&
+ (scaledHeight / (cHeight/5) == resizeCache.height() / (cHeight/5)))
+ return;
+
+ resizeCache = QPixmap(); // for resized animations
+
+ if(completeRepaint)
+ repaintRectangle(borderLeft()+paddingLeft(), borderTop()+paddingTop(), contentWidth(), contentHeight());
+ else
+ {
+ repaintRectangle(r.x() + borderLeft() + paddingLeft(), r.y() + borderTop() + paddingTop(),
+ r.width(), r.height());
+ }
+ }
+}
+
+void RenderImage::paint(PaintInfo& paintInfo, int _tx, int _ty)
+{
+ if (paintInfo.phase == PaintActionOutline && style()->outlineWidth() && style()->visibility() == VISIBLE)
+ paintOutline(paintInfo.p, _tx + m_x, _ty + m_y, width(), height(), style());
+
+ if (paintInfo.phase != PaintActionForeground && paintInfo.phase != PaintActionSelection)
+ return;
+
+ // not visible or not even once layouted?
+ if (style()->visibility() != VISIBLE || m_y <= -500000) return;
+
+ _tx += m_x;
+ _ty += m_y;
+
+ if((_ty > paintInfo.r.bottom()) || (_ty + m_height <= paintInfo.r.top())) return;
+
+ if(shouldPaintBackgroundOrBorder())
+ paintBoxDecorations(paintInfo, _tx, _ty);
+
+ int cWidth = contentWidth();
+ int cHeight = contentHeight();
+ int leftBorder = borderLeft();
+ int topBorder = borderTop();
+ int leftPad = paddingLeft();
+ int topPad = paddingTop();
+
+ if (!canvas()->printImages())
+ return;
+
+ CachedImage* i = m_oldImage && m_oldImage->valid_rect().size() == m_oldImage->pixmap_size() &&
+ m_oldImage->pixmap_size().width() == intrinsicWidth() &&
+ m_oldImage->pixmap_size().height() == intrinsicHeight()
+ ? m_oldImage : m_cachedImage;
+
+ // paint frame around image as long as it is not completely loaded from web.
+ if (bUnfinishedImageFrame && paintInfo.phase == PaintActionForeground && cWidth > 2 && cHeight > 2 && !complete()) {
+ static QPixmap *loadingIcon;
+ QColor bg = khtml::retrieveBackgroundColor(this);
+ QColor fg = khtml::hasSufficientContrast(Qt::gray, bg) ? Qt::gray :
+ (hasSufficientContrast(Qt::white, bg) ? Qt::white : Qt::black);
+ paintInfo.p->setPen(QPen(fg, 1));
+ paintInfo.p->setBrush( Qt::NoBrush );
+ paintInfo.p->drawRect(_tx, _ty, m_width, m_height);
+ if (!(m_width <= 5 || m_height <= 5)) {
+ if (!loadingIcon) {
+ loadingIcon = new QPixmap();
+ loadingIcon->loadFromData(loading_icon_data, loading_icon_len);
+ }
+ paintInfo.p->drawPixmap(_tx + 4, _ty + 4, *loadingIcon, 0, 0, m_width - 5, m_height - 5);
+ }
+
+ }
+
+ //kdDebug( 6040 ) << " contents (" << contentWidth << "/" << contentHeight << ") border=" << borderLeft() << " padding=" << paddingLeft() << endl;
+ if ( !i || berrorPic)
+ {
+ if(cWidth > 2 && cHeight > 2)
+ {
+ if ( !berrorPic ) {
+ //qDebug("qDrawShadePanel %d/%d/%d/%d", _tx + leftBorder, _ty + topBorder, cWidth, cHeight);
+ qDrawShadePanel( paintInfo.p, _tx + leftBorder + leftPad, _ty + topBorder + topPad, cWidth, cHeight,
+ KApplication::palette().inactive(), true, 1 );
+ }
+ QPixmap const* pix = i ? &i->pixmap() : 0;
+ if(berrorPic && pix && (cWidth >= pix->width()+4) && (cHeight >= pix->height()+4) )
+ {
+ QRect r(pix->rect());
+ r = r.intersect(QRect(0, 0, cWidth-4, cHeight-4));
+ paintInfo.p->drawPixmap( QPoint( _tx + leftBorder + leftPad+2, _ty + topBorder + topPad+2), *pix, r );
+ }
+ if(!alt.isEmpty()) {
+ QString text = alt.string();
+ paintInfo.p->setFont(style()->font());
+ paintInfo.p->setPen( style()->color() );
+ int ax = _tx + leftBorder + leftPad + 2;
+ int ay = _ty + topBorder + topPad + 2;
+ const QFontMetrics &fm = style()->fontMetrics();
+ if (cWidth>5 && cHeight>=fm.height())
+ paintInfo.p->drawText(ax, ay+1, cWidth - 4, cHeight - 4, Qt::WordBreak, text );
+ }
+ }
+ }
+ else if (i && !i->isTransparent())
+ {
+ paintInfo.p->setPen( Qt::black ); // used for bitmaps
+ const QPixmap& pix = i->pixmap();
+ if ( (cWidth != intrinsicWidth() || cHeight != intrinsicHeight()) &&
+ pix.width() > 0 && pix.height() > 0 && i->valid_rect().isValid())
+ {
+ if (resizeCache.isNull() && cWidth && cHeight && intrinsicWidth() && intrinsicHeight())
+ {
+ QRect scaledrect(i->valid_rect());
+// kdDebug(6040) << "time elapsed: " << dt->elapsed() << endl;
+// kdDebug( 6040 ) << "have to scale: " << endl;
+// qDebug("cw=%d ch=%d pw=%d ph=%d rcw=%d, rch=%d",
+// cWidth, cHeight, intrinsicWidth(), intrinsicHeight(), resizeCache.width(), resizeCache.height());
+ QWMatrix matrix;
+ matrix.scale( (float)(cWidth)/intrinsicWidth(),
+ (float)(cHeight)/intrinsicHeight() );
+ resizeCache = pix.xForm( matrix );
+ scaledrect.setWidth( ( cWidth*scaledrect.width() ) / intrinsicWidth() );
+ scaledrect.setHeight( ( cHeight*scaledrect.height() ) / intrinsicHeight() );
+// qDebug("resizeCache size: %d/%d", resizeCache.width(), resizeCache.height());
+// qDebug("valid: %d/%d, scaled: %d/%d",
+// i->valid_rect().width(), i->valid_rect().height(),
+// scaledrect.width(), scaledrect.height());
+
+ // sometimes scaledrect.width/height are off by one because
+ // of rounding errors. if the i is fully loaded, we
+ // make sure that we don't do unnecessary resizes during painting
+ QSize s(scaledrect.size());
+ if(i->valid_rect().size() == QSize( intrinsicWidth(), intrinsicHeight() )) // fully loaded
+ s = QSize(cWidth, cHeight);
+ if(kAbs(s.width() - cWidth) < 2) // rounding errors
+ s.setWidth(cWidth);
+ if(resizeCache.size() != s)
+ resizeCache.resize(s);
+
+ paintInfo.p->drawPixmap( QPoint( _tx + leftBorder + leftPad, _ty + topBorder + topPad),
+ resizeCache, scaledrect );
+ }
+ else
+ paintInfo.p->drawPixmap( QPoint( _tx + leftBorder + leftPad, _ty + topBorder + topPad), resizeCache );
+ }
+ else
+ {
+ // we might be just about switching images
+ QRect rect(i->valid_rect().isValid() ? i->valid_rect()
+ : QRect(0, 0, intrinsicWidth(), intrinsicHeight()));
+
+ QPoint offs( _tx + leftBorder + leftPad, _ty + topBorder + topPad);
+// qDebug("normal paint rect %d/%d/%d/%d", rect.x(), rect.y(), rect.width(), rect.height());
+// rect = rect & QRect( 0 , y - offs.y() - 10, w, 10 + y + h - offs.y());
+
+// qDebug("normal paint rect after %d/%d/%d/%d", rect.x(), rect.y(), rect.width(), rect.height());
+// qDebug("normal paint: offs.y(): %d, y: %d, diff: %d", offs.y(), y, y - offs.y());
+// qDebug("");
+
+// p->setClipRect(QRect(x,y,w,h));
+
+
+// p->drawPixmap( offs.x(), y, pix, rect.x(), rect.y(), rect.width(), rect.height() );
+ paintInfo.p->drawPixmap(offs, pix, rect);
+
+ }
+ }
+ if (m_selectionState != SelectionNone) {
+// kdDebug(6040) << "_tx " << _tx << " _ty " << _ty << " _x " << _x << " _y " << _y << endl;
+ // Draw in any case if inside selection. For selection borders, the
+ // offset will decide whether to draw selection or not
+ bool draw = true;
+ if (m_selectionState != SelectionInside) {
+ int startPos, endPos;
+ selectionStartEnd(startPos, endPos);
+ if(selectionState() == SelectionStart)
+ endPos = 1;
+ else if(selectionState() == SelectionEnd)
+ startPos = 0;
+ draw = endPos - startPos > 0;
+ }
+ if (draw) {
+ // setting the brush origin is important for compatibility,
+ // don't touch it unless you know what you're doing
+ paintInfo.p->setBrushOrigin(_tx, _ty - paintInfo.r.y());
+ paintInfo.p->fillRect(_tx, _ty, width(), height(),
+ QBrush(style()->palette().active().highlight(),
+ Qt::Dense4Pattern));
+ }
+ }
+}
+
+void RenderImage::layout()
+{
+ KHTMLAssert( needsLayout());
+ KHTMLAssert( minMaxKnown() );
+
+ short oldwidth = m_width;
+ int oldheight = m_height;
+
+ // minimum height
+ m_height = m_cachedImage && m_cachedImage->isErrorImage() ? intrinsicHeight() : 0;
+
+ calcWidth();
+ calcHeight();
+
+ // if they are variable width and we calculate a huge height or width, we assume they
+ // actually wanted the intrinsic width.
+ if ( m_width > 4096 && !style()->width().isFixed() )
+ m_width = intrinsicWidth() + paddingLeft() + paddingRight() + borderLeft() + borderRight();
+ if ( m_height > 2048 && !style()->height().isFixed() )
+ m_height = intrinsicHeight() + paddingTop() + paddingBottom() + borderTop() + borderBottom();
+
+ // limit total size to not run out of memory when doing the xform call.
+ if ( ( m_width * m_height > 4096*2048 ) &&
+ ( contentWidth() > intrinsicWidth() || contentHeight() > intrinsicHeight() ) ) {
+ float scale = sqrt( m_width*m_height / ( 4096.*2048. ) );
+ m_width = (int) (m_width/scale);
+ m_height = (int) (m_height/scale);
+ }
+
+ if ( m_width != oldwidth || m_height != oldheight )
+ resizeCache = QPixmap();
+
+ setNeedsLayout(false);
+}
+
+void RenderImage::notifyFinished(CachedObject *finishedObj)
+{
+ if ( ( m_cachedImage == finishedObj || m_oldImage == finishedObj ) && m_oldImage ) {
+ m_oldImage->deref( this );
+ m_oldImage = 0;
+ repaint();
+ }
+
+ RenderReplaced::notifyFinished(finishedObj);
+}
+
+bool RenderImage::nodeAtPoint(NodeInfo& info, int _x, int _y, int _tx, int _ty, HitTestAction hitTestAction, bool inside)
+{
+ inside |= RenderReplaced::nodeAtPoint(info, _x, _y, _tx, _ty, hitTestAction, inside);
+
+ if (inside && element()) {
+ int tx = _tx + m_x;
+ int ty = _ty + m_y;
+ if (isRelPositioned())
+ relativePositionOffset(tx, ty);
+
+ HTMLImageElementImpl* i = element()->id() == ID_IMG ? static_cast<HTMLImageElementImpl*>(element()) : 0;
+ HTMLMapElementImpl* map;
+ if (i && i->getDocument()->isHTMLDocument() &&
+ (map = static_cast<HTMLDocumentImpl*>(i->getDocument())->getMap(i->imageMap()))) {
+ // we're a client side image map
+ inside = map->mapMouseEvent(_x - tx, _y - ty, contentWidth(), contentHeight(), info);
+ info.setInnerNonSharedNode(element());
+ }
+ }
+
+ return inside;
+}
+
+void RenderImage::updateImage(CachedImage* new_image)
+{
+ CachedImage* tempimage = m_oldImage;
+ m_oldImage = m_cachedImage;
+ m_cachedImage = new_image;
+ assert( m_cachedImage != m_oldImage );
+
+ if ( m_cachedImage )
+ m_cachedImage->ref(this);
+
+ if ( tempimage )
+ tempimage->deref(this);
+
+ // if the loading finishes we might get an error and then the image is deleted
+ if ( m_cachedImage )
+ berrorPic = m_cachedImage->isErrorImage();
+ else
+ berrorPic = true;
+}
+
+void RenderImage::updateFromElement()
+{
+ if (element()->id() == ID_INPUT)
+ alt = static_cast<HTMLInputElementImpl*>(element())->altText();
+ else if (element()->id() == ID_IMG)
+ alt = static_cast<HTMLImageElementImpl*>(element())->altText();
+
+ DOMString u = element()->id() == ID_OBJECT ?
+ element()->getAttribute(ATTR_DATA) : element()->getAttribute(ATTR_SRC);
+
+ if (!u.isEmpty() &&
+ ( !m_cachedImage || m_cachedImage->url() != u ) ) {
+ CachedImage *new_image = element()->getDocument()->docLoader()->
+ requestImage(khtml::parseURL(u));
+
+ if(new_image && new_image != m_cachedImage)
+ updateImage( new_image );
+ }
+}
+
+bool RenderImage::complete() const
+{
+ // "complete" means that the image has been loaded
+ // but also that its width/height (contentWidth(),contentHeight()) have been calculated.
+ return m_cachedImage && m_cachedImage->valid_rect().size() == m_cachedImage->pixmap_size() && !needsLayout();
+}
+
+bool RenderImage::isWidthSpecified() const
+{
+ switch (style()->width().type()) {
+ case Fixed:
+ case Percent:
+ return true;
+ default:
+ return false;
+ }
+ assert(false);
+ return false;
+}
+
+bool RenderImage::isHeightSpecified() const
+{
+ switch (style()->height().type()) {
+ case Fixed:
+ case Percent:
+ return true;
+ default:
+ return false;
+ }
+ assert(false);
+ return false;
+}
+
+short RenderImage::calcAspectRatioWidth() const
+{
+ if (intrinsicHeight() == 0)
+ return 0;
+ if (!m_cachedImage || m_cachedImage->isErrorImage())
+ return intrinsicWidth(); // Don't bother scaling.
+ return RenderReplaced::calcReplacedHeight() * intrinsicWidth() / intrinsicHeight();
+}
+
+int RenderImage::calcAspectRatioHeight() const
+{
+ if (intrinsicWidth() == 0)
+ return 0;
+ if (!m_cachedImage || m_cachedImage->isErrorImage())
+ return intrinsicHeight(); // Don't bother scaling.
+ return RenderReplaced::calcReplacedWidth() * intrinsicHeight() / intrinsicWidth();
+}
+
+short RenderImage::calcReplacedWidth() const
+{
+ int width;
+ if (isWidthSpecified())
+ width = calcReplacedWidthUsing(Width);
+ else
+ width = calcAspectRatioWidth();
+ int minW = calcReplacedWidthUsing(MinWidth);
+ int maxW = style()->maxWidth().value() == UNDEFINED ? width : calcReplacedWidthUsing(MaxWidth);
+
+ if (width > maxW)
+ width = maxW;
+
+ if (width < minW)
+ width = minW;
+
+ return width;
+}
+
+int RenderImage::calcReplacedHeight() const
+{
+ int height;
+ if (isHeightSpecified())
+ height = calcReplacedHeightUsing(Height);
+ else
+ height = calcAspectRatioHeight();
+
+ int minH = calcReplacedHeightUsing(MinHeight);
+ int maxH = style()->maxHeight().value() == UNDEFINED ? height : calcReplacedHeightUsing(MaxHeight);
+
+ if (height > maxH)
+ height = maxH;
+
+ if (height < minH)
+ height = minH;
+
+ return height;
+}
+
+#if 0
+void RenderImage::caretPos(int offset, int flags, int &_x, int &_y, int &width, int &height)
+{
+ RenderReplaced::caretPos(offset, flags, _x, _y, width, height);
+
+#if 0 // doesn't work reliably
+ height = intrinsicHeight();
+ width = override && offset == 0 ? intrinsicWidth() : 0;
+ _x = xPos();
+ _y = yPos();
+ if (offset > 0) _x += intrinsicWidth();
+
+ RenderObject *cb = containingBlock();
+
+ int absx, absy;
+ if (cb && cb != this && cb->absolutePosition(absx,absy))
+ {
+ _x += absx;
+ _y += absy;
+ } else {
+ // we don't know our absolute position, and there is no point returning
+ // just a relative one
+ _x = _y = -1;
+ }
+#endif
+}
+#endif