wilderjds
/
okular
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
7996 Commits
9 Branches
332 Tags
50 MiB
 
 
 
 
 
Tag: Branch: Tree: 09b7b079ac
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '09b7b079ac'
${ noResults }
okular/ui/pagepainter.cpp

998 lines
48 KiB
Raw Blame History

/***************************************************************************
* Copyright (C) 2005 by Enrico Ros <eros.kde@email.it> *
* *
* 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. *
***************************************************************************/
#include "pagepainter.h"
// qt / kde includes
#include <qrect.h>
#include <qpainter.h>
#include <qpalette.h>
#include <qpixmap.h>
#include <qvarlengtharray.h>
#include <kiconloader.h>
#include <QtCore/QDebug>
#include <QApplication>
#include <QIcon>
// system includes
#include <math.h>
// local includes
#include "core/area.h"
#include "core/page.h"
#include "core/page_p.h"
#include "core/annotations.h"
#include "core/utils.h"
#include "guiutils.h"
#include "settings.h"
#include "core/observer.h"
#include "core/tile.h"
#include "settings_core.h"
#include "ui/debug_ui.h"
Q_GLOBAL_STATIC_WITH_ARGS( QPixmap, busyPixmap, ( KIconLoader::global()->loadIcon(QLatin1String("okular"), KIconLoader::NoGroup, IconSize(KIconLoader::Desktop), KIconLoader::DefaultState, QStringList(), 0, true) ) )
#define TEXTANNOTATION_ICONSIZE 24
inline QPen buildPen( const Okular::Annotation *ann, double width, const QColor &color )
{
QPen p(
QBrush( color ),
width,
ann->style().lineStyle() == Okular::Annotation::Dashed ? Qt::DashLine : Qt::SolidLine,
Qt::SquareCap,
Qt::MiterJoin
);
return p;
}
void PagePainter::paintPageOnPainter( QPainter * destPainter, const Okular::Page * page,
Okular::DocumentObserver *observer, int flags, int scaledWidth, int scaledHeight, const QRect &limits )
{
paintCroppedPageOnPainter( destPainter, page, observer, flags, scaledWidth, scaledHeight, limits,
Okular::NormalizedRect( 0, 0, 1, 1 ), nullptr );
}
void PagePainter::paintCroppedPageOnPainter( QPainter * destPainter, const Okular::Page * page,
Okular::DocumentObserver *observer, int flags, int scaledWidth, int scaledHeight, const QRect &limits,
const Okular::NormalizedRect &crop, Okular::NormalizedPoint *viewPortPoint )
{
qreal dpr = destPainter->device()->devicePixelRatioF();
/* Calculate the cropped geometry of the page */
QRect scaledCrop = crop.geometry( scaledWidth, scaledHeight );
/* variables prefixed with d are in the device pixels coordinate system, which translates to the rendered output - that means,
* multiplied with the device pixel ratio of the target PaintDevice */
const QRect dScaledCrop(QRectF(scaledCrop.x() * dpr, scaledCrop.y() * dpr, scaledCrop.width() * dpr, scaledCrop.height() * dpr).toAlignedRect());
int croppedWidth = scaledCrop.width();
int croppedHeight = scaledCrop.height();
int dScaledWidth = ceil(scaledWidth * dpr);
int dScaledHeight = ceil(scaledHeight * dpr);
const QRect dLimits(QRectF(limits.x() * dpr, limits.y() * dpr, limits.width() * dpr, limits.height() * dpr).toAlignedRect());
QColor paperColor = Qt::white;
QColor backgroundColor = paperColor;
if ( Okular::SettingsCore::changeColors() )
{
switch ( Okular::SettingsCore::renderMode() )
{
case Okular::SettingsCore::EnumRenderMode::Inverted:
backgroundColor = Qt::black;
break;
case Okular::SettingsCore::EnumRenderMode::Paper:
paperColor = Okular::SettingsCore::paperColor();
backgroundColor = paperColor;
break;
case Okular::SettingsCore::EnumRenderMode::Recolor:
backgroundColor = Okular::Settings::recolorBackground();
break;
default: ;
}
}
destPainter->fillRect( limits, backgroundColor );
const bool hasTilesManager = page->hasTilesManager( observer );
QPixmap pixmap;
if ( !hasTilesManager )
{
/** 1 - RETRIEVE THE 'PAGE+ID' PIXMAP OR A SIMILAR 'PAGE' ONE **/
const QPixmap *p = page->_o_nearestPixmap( observer, dScaledWidth, dScaledHeight );
if (p != NULL) {
pixmap = *p;
pixmap.setDevicePixelRatio( qApp->devicePixelRatio() );
}
/** 1B - IF NO PIXMAP, DRAW EMPTY PAGE **/
double pixmapRescaleRatio = !pixmap.isNull() ? dScaledWidth / (double)pixmap.width() : -1;
long pixmapPixels = !pixmap.isNull() ? (long)pixmap.width() * (long)pixmap.height() : 0;
if ( pixmap.isNull() || pixmapRescaleRatio > 20.0 || pixmapRescaleRatio < 0.25 ||
(dScaledWidth > pixmap.width() && pixmapPixels > 60000000L) )
{
// draw something on the blank page: the okular icon or a cross (as a fallback)
if ( !busyPixmap()->isNull() )
{
busyPixmap->setDevicePixelRatio(dpr);
destPainter->drawPixmap( QPoint( 10, 10 ), *busyPixmap() );
}
else
{
destPainter->setPen( Qt::gray );
destPainter->drawLine( 0, 0, croppedWidth-1, croppedHeight-1 );
destPainter->drawLine( 0, croppedHeight-1, croppedWidth-1, 0 );
}
return;
}
}
/** 2 - FIND OUT WHAT TO PAINT (Flags + Configuration + Presence) **/
bool canDrawHighlights = (flags & Highlights) && !page->m_highlights.isEmpty();
bool canDrawTextSelection = (flags & TextSelection) && page->textSelection();
bool canDrawAnnotations = (flags & Annotations) && !page->m_annotations.isEmpty();
bool enhanceLinks = (flags & EnhanceLinks) && Okular::Settings::highlightLinks();
bool enhanceImages = (flags & EnhanceImages) && Okular::Settings::highlightImages();
// vectors containing objects to draw
// make this a qcolor, rect map, since we don't need
// to know s_id here! we are only drawing this right?
QList< QPair<QColor, Okular::NormalizedRect> > * bufferedHighlights = nullptr;
QList< Okular::Annotation * > * bufferedAnnotations = nullptr;
QList< Okular::Annotation * > * unbufferedAnnotations = nullptr;
Okular::Annotation *boundingRectOnlyAnn = nullptr; // Paint the bounding rect of this annotation
// fill up lists with visible annotation/highlight objects/text selections
if ( canDrawHighlights || canDrawTextSelection || canDrawAnnotations )
{
// precalc normalized 'limits rect' for intersection
double nXMin = ( (double)limits.left() / scaledWidth ) + crop.left,
nXMax = ( (double)limits.right() / scaledWidth ) + crop.left,
nYMin = ( (double)limits.top() / scaledHeight ) + crop.top,
nYMax = ( (double)limits.bottom() / scaledHeight ) + crop.top;
// append all highlights inside limits to their list
if ( canDrawHighlights )
{
if ( !bufferedHighlights )
bufferedHighlights = new QList< QPair<QColor, Okular::NormalizedRect> >();
/* else
{*/
Okular::NormalizedRect* limitRect = new Okular::NormalizedRect(nXMin, nYMin, nXMax, nYMax );
QLinkedList< Okular::HighlightAreaRect * >::const_iterator h2It = page->m_highlights.constBegin(), hEnd = page->m_highlights.constEnd();
Okular::HighlightAreaRect::const_iterator hIt;
for ( ; h2It != hEnd; ++h2It )
for (hIt=(*h2It)->constBegin(); hIt!=(*h2It)->constEnd(); ++hIt)
{
if ((*hIt).intersects(limitRect))
bufferedHighlights->append( qMakePair((*h2It)->color,*hIt) );
}
delete limitRect;
//}
}
if ( canDrawTextSelection )
{
if ( !bufferedHighlights )
bufferedHighlights = new QList< QPair<QColor, Okular::NormalizedRect> >();
/* else
{*/
Okular::NormalizedRect* limitRect = new Okular::NormalizedRect(nXMin, nYMin, nXMax, nYMax );
const Okular::RegularAreaRect *textSelection = page->textSelection();
Okular::HighlightAreaRect::const_iterator hIt = textSelection->constBegin(), hEnd = textSelection->constEnd();
for ( ; hIt != hEnd; ++hIt )
{
if ( (*hIt).intersects( limitRect ) )
bufferedHighlights->append( qMakePair( page->textSelectionColor(), *hIt ) );
}
delete limitRect;
//}
}
// append annotations inside limits to the un/buffered list
if ( canDrawAnnotations )
{
QLinkedList< Okular::Annotation * >::const_iterator aIt = page->m_annotations.constBegin(), aEnd = page->m_annotations.constEnd();
for ( ; aIt != aEnd; ++aIt )
{
Okular::Annotation * ann = *aIt;
int flags = ann->flags();
if ( flags & Okular::Annotation::Hidden )
continue;
if ( flags & Okular::Annotation::ExternallyDrawn )
{
// ExternallyDrawn annots are never rendered by PagePainter.
// Just paint the boundingRect if the annot is moved or resized.
if ( flags & (Okular::Annotation::BeingMoved | Okular::Annotation::BeingResized) )
{
boundingRectOnlyAnn = ann;
}
continue;
}
bool intersects = ann->transformedBoundingRectangle().intersects( nXMin, nYMin, nXMax, nYMax );
if ( ann->subType() == Okular::Annotation::AText )
{
Okular::TextAnnotation * ta = static_cast< Okular::TextAnnotation * >( ann );
if ( ta->textType() == Okular::TextAnnotation::Linked )
{
Okular::NormalizedRect iconrect( ann->transformedBoundingRectangle().left,
ann->transformedBoundingRectangle().top,
ann->transformedBoundingRectangle().left + TEXTANNOTATION_ICONSIZE / page->width(),
ann->transformedBoundingRectangle().top + TEXTANNOTATION_ICONSIZE / page->height() );
intersects = iconrect.intersects( nXMin, nYMin, nXMax, nYMax );
}
}
if ( intersects )
{
Okular::Annotation::SubType type = ann->subType();
if ( type == Okular::Annotation::ALine || type == Okular::Annotation::AHighlight ||
type == Okular::Annotation::AInk /*|| (type == Annotation::AGeom && ann->style().opacity() < 0.99)*/ )
{
if ( !bufferedAnnotations )
bufferedAnnotations = new QList< Okular::Annotation * >();
bufferedAnnotations->append( ann );
}
else
{
if ( !unbufferedAnnotations )
unbufferedAnnotations = new QList< Okular::Annotation * >();
unbufferedAnnotations->append( ann );
}
}
}
}
// end of intersections checking
}
/** 3 - ENABLE BACKBUFFERING IF DIRECT IMAGE MANIPULATION IS NEEDED **/
bool bufferAccessibility = (flags & Accessibility) && Okular::SettingsCore::changeColors() && (Okular::SettingsCore::renderMode() != Okular::SettingsCore::EnumRenderMode::Paper);
bool useBackBuffer = bufferAccessibility || bufferedHighlights || bufferedAnnotations || viewPortPoint;
QPixmap * backPixmap = nullptr;
QPainter * mixedPainter = nullptr;
QRect limitsInPixmap = limits.translated( scaledCrop.topLeft() );
QRect dLimitsInPixmap = dLimits.translated( dScaledCrop.topLeft() );
// limits within full (scaled but uncropped) pixmap
/** 4A -- REGULAR FLOW. PAINT PIXMAP NORMAL OR RESCALED USING GIVEN QPAINTER **/
if ( !useBackBuffer )
{
if ( hasTilesManager )
{
const Okular::NormalizedRect normalizedLimits( limitsInPixmap, scaledWidth, scaledHeight );
const QList<Okular::Tile> tiles = page->tilesAt( observer, normalizedLimits );
QList<Okular::Tile>::const_iterator tIt = tiles.constBegin(), tEnd = tiles.constEnd();
while ( tIt != tEnd )
{
const Okular::Tile &tile = *tIt;
QRect tileRect = tile.rect().geometry( scaledWidth, scaledHeight ).translated( -scaledCrop.topLeft() );
QRect dTileRect = QRectF(tileRect.x() * dpr, tileRect.y() * dpr, tileRect.width() * dpr, tileRect.height() * dpr).toAlignedRect();
QRect limitsInTile = limits & tileRect;
QRectF dLimitsInTile = dLimits & dTileRect;
if ( !limitsInTile.isEmpty() )
{
QPixmap* tilePixmap = tile.pixmap();
tilePixmap->setDevicePixelRatio( qApp->devicePixelRatio() );
if ( tilePixmap->width() == dTileRect.width() && tilePixmap->height() == dTileRect.height() ) {
destPainter->drawPixmap( limitsInTile.topLeft(), *tilePixmap,
dLimitsInTile.translated( -dTileRect.topLeft() ) );
} else {
destPainter->drawPixmap( tileRect, *tilePixmap );
}
}
tIt++;
}
}
else
{
QPixmap scaledCroppedPixmap = pixmap.scaled(dScaledWidth, dScaledHeight).copy(dLimitsInPixmap);
scaledCroppedPixmap.setDevicePixelRatio(dpr);
destPainter->drawPixmap( limits.topLeft(), scaledCroppedPixmap, QRectF(0, 0, dLimits.width(),dLimits.height()));
}
// 4A.2. active painter is the one passed to this method
mixedPainter = destPainter;
}
/** 4B -- BUFFERED FLOW. IMAGE PAINTING + OPERATIONS. QPAINTER OVER PIXMAP **/
else
{
// the image over which we are going to draw
QImage backImage = QImage( dLimits.width(), dLimits.height(), QImage::Format_ARGB32_Premultiplied );
backImage.setDevicePixelRatio(dpr);
backImage.fill( paperColor );
QPainter p( &backImage );
if ( hasTilesManager )
{
const Okular::NormalizedRect normalizedLimits( limitsInPixmap, scaledWidth, scaledHeight );
const QList<Okular::Tile> tiles = page->tilesAt( observer, normalizedLimits );
QList<Okular::Tile>::const_iterator tIt = tiles.constBegin(), tEnd = tiles.constEnd();
while ( tIt != tEnd )
{
const Okular::Tile &tile = *tIt;
QRect tileRect = tile.rect().geometry( scaledWidth, scaledHeight ).translated( -scaledCrop.topLeft() );
QRect dTileRect(QRectF(tileRect.x() * dpr, tileRect.y() * dpr, tileRect.width() * dpr, tileRect.height() * dpr).toAlignedRect());
QRect limitsInTile = limits & tileRect;
QRect dLimitsInTile = dLimits & dTileRect;
if ( !limitsInTile.isEmpty() )
{
QPixmap* tilePixmap = tile.pixmap();
tilePixmap->setDevicePixelRatio( qApp->devicePixelRatio() );
if ( tilePixmap->width() == dTileRect.width() && tilePixmap->height() == dTileRect.height() )
{
p.drawPixmap( limitsInTile.translated( -limits.topLeft() ).topLeft(), *tilePixmap,
dLimitsInTile.translated( -dTileRect.topLeft() ) );
}
else
{
double xScale = tilePixmap->width() / (double)dTileRect.width();
double yScale = tilePixmap->height() / (double)dTileRect.height();
QTransform transform( xScale, 0, 0, yScale, 0, 0 );
p.drawPixmap( limitsInTile.translated( -limits.topLeft() ), *tilePixmap,
transform.mapRect( dLimitsInTile ).translated( -transform.mapRect( dTileRect ).topLeft() ) );
}
}
++tIt;
}
}
else
{
// 4B.1. draw the page pixmap: normal or scaled
QPixmap scaledCroppedPixmap = pixmap.scaled(dScaledWidth, dScaledHeight).copy(dLimitsInPixmap);
scaledCroppedPixmap.setDevicePixelRatio(dpr);
p.drawPixmap( 0, 0, scaledCroppedPixmap );
}
p.end();
// 4B.2. modify pixmap following accessibility settings
if ( bufferAccessibility )
{
switch ( Okular::SettingsCore::renderMode() )
{
case Okular::SettingsCore::EnumRenderMode::Inverted:
// Invert image pixels using QImage internal function
backImage.invertPixels(QImage::InvertRgb);
break;
case Okular::SettingsCore::EnumRenderMode::Recolor:
recolor(&backImage, Okular::Settings::recolorForeground(), Okular::Settings::recolorBackground());
break;
case Okular::SettingsCore::EnumRenderMode::BlackWhite:
// Manual Gray and Contrast
unsigned int * data = (unsigned int *)backImage.bits();
int val, pixels = backImage.width() * backImage.height(),
con = Okular::Settings::bWContrast(), thr = 255 - Okular::Settings::bWThreshold();
for( int i = 0; i < pixels; ++i )
{
val = qGray( data[i] );
if ( val > thr )
val = 128 + (127 * (val - thr)) / (255 - thr);
else if ( val < thr )
val = (128 * val) / thr;
if ( con > 2 )
{
val = con * ( val - thr ) / 2 + thr;
if ( val > 255 )
val = 255;
else if ( val < 0 )
val = 0;
}
data[i] = qRgba( val, val, val, 255 );
}
break;
}
}
// 4B.3. highlight rects in page
if ( bufferedHighlights )
{
// draw highlights that are inside the 'limits' paint region
for (const auto& highlight : *bufferedHighlights)
{
const Okular::NormalizedRect & r = highlight.second;
// find out the rect to highlight on pixmap
QRect highlightRect = r.geometry( scaledWidth, scaledHeight ).translated( -scaledCrop.topLeft() ).intersected( limits );
highlightRect.translate( -limits.left(), -limits.top() );
const QColor highlightColor = highlight.first;
QPainter painter(&backImage);
painter.setCompositionMode(QPainter::CompositionMode_Multiply);
painter.fillRect(highlightRect, highlightColor);
}
}
// 4B.4. paint annotations [COMPOSITED ONES]
if ( bufferedAnnotations )
{
// Albert: This is quite "heavy" but all the backImage that reach here are QImage::Format_ARGB32_Premultiplied
// and have to be so that the QPainter::CompositionMode_Multiply works
// we could also put a
// backImage = backImage.convertToFormat(QImage::Format_ARGB32_Premultiplied)
// that would be almost a noop, but we'll leave the assert for now
Q_ASSERT(backImage.format() == QImage::Format_ARGB32_Premultiplied);
// precalc constants for normalizing [0,1] page coordinates into normalized [0,1] limit rect coordinates
double pageScale = (double)croppedWidth / page->width();
double xOffset = (double)limits.left() / (double)scaledWidth + crop.left,
xScale = (double)scaledWidth / (double)limits.width(),
yOffset = (double)limits.top() / (double)scaledHeight + crop.top,
yScale = (double)scaledHeight / (double)limits.height();
// paint all buffered annotations in the page
QList< Okular::Annotation * >::const_iterator aIt = bufferedAnnotations->constBegin(), aEnd = bufferedAnnotations->constEnd();
for ( ; aIt != aEnd; ++aIt )
{
Okular::Annotation * a = *aIt;
Okular::Annotation::SubType type = a->subType();
QColor acolor = a->style().color();
if ( !acolor.isValid() )
acolor = Qt::yellow;
acolor.setAlphaF( a->style().opacity() );
// draw LineAnnotation MISSING: all
if ( type == Okular::Annotation::ALine )
{
// get the annotation
Okular::LineAnnotation * la = (Okular::LineAnnotation *) a;
NormalizedPath path;
// normalize page point to image
const QLinkedList<Okular::NormalizedPoint> points = la->transformedLinePoints();
QLinkedList<Okular::NormalizedPoint>::const_iterator it = points.constBegin();
QLinkedList<Okular::NormalizedPoint>::const_iterator itEnd = points.constEnd();
for ( ; it != itEnd; ++it )
{
Okular::NormalizedPoint point;
point.x = ( (*it).x - xOffset) * xScale;
point.y = ( (*it).y - yOffset) * yScale;
path.append( point );
}
const QPen linePen = buildPen( a, a->style().width(), a->style().color() );
QBrush fillBrush;
if ( la->lineClosed() && la->lineInnerColor().isValid() )
fillBrush = QBrush( la->lineInnerColor() );
// draw the line as normalized path into image
drawShapeOnImage( backImage, path, la->lineClosed(),
linePen,
fillBrush, pageScale ,Multiply);
if ( path.count() == 2 && fabs( la->lineLeadingForwardPoint() ) > 0.1 )
{
Okular::NormalizedPoint delta( la->transformedLinePoints().last().x - la->transformedLinePoints().first().x, la->transformedLinePoints().first().y - la->transformedLinePoints().last().y );
double angle = atan2( delta.y, delta.x );
if ( delta.y < 0 )
angle += 2 * M_PI;
int sign = la->lineLeadingForwardPoint() > 0.0 ? 1 : -1;
double LLx = fabs( la->lineLeadingForwardPoint() ) * cos( angle + sign * M_PI_2 + 2 * M_PI ) / page->width();
double LLy = fabs( la->lineLeadingForwardPoint() ) * sin( angle + sign * M_PI_2 + 2 * M_PI ) / page->height();
NormalizedPath path2;
NormalizedPath path3;
Okular::NormalizedPoint point;
point.x = ( la->transformedLinePoints().first().x + LLx - xOffset ) * xScale;
point.y = ( la->transformedLinePoints().first().y - LLy - yOffset ) * yScale;
path2.append( point );
point.x = ( la->transformedLinePoints().last().x + LLx - xOffset ) * xScale;
point.y = ( la->transformedLinePoints().last().y - LLy - yOffset ) * yScale;
path3.append( point );
// do we have the extension on the "back"?
if ( fabs( la->lineLeadingBackwardPoint() ) > 0.1 )
{
double LLEx = la->lineLeadingBackwardPoint() * cos( angle - sign * M_PI_2 + 2 * M_PI ) / page->width();
double LLEy = la->lineLeadingBackwardPoint() * sin( angle - sign * M_PI_2 + 2 * M_PI ) / page->height();
point.x = ( la->transformedLinePoints().first().x + LLEx - xOffset ) * xScale;
point.y = ( la->transformedLinePoints().first().y - LLEy - yOffset ) * yScale;
path2.append( point );
point.x = ( la->transformedLinePoints().last().x + LLEx - xOffset ) * xScale;
point.y = ( la->transformedLinePoints().last().y - LLEy - yOffset ) * yScale;
path3.append( point );
}
else
{
path2.append( path[0] );
path3.append( path[1] );
}
drawShapeOnImage( backImage, path2, false, linePen, QBrush(), pageScale, Multiply );
drawShapeOnImage( backImage, path3, false, linePen, QBrush(), pageScale, Multiply );
}
}
// draw HighlightAnnotation MISSING: under/strike width, feather, capping
else if ( type == Okular::Annotation::AHighlight )
{
// get the annotation
Okular::HighlightAnnotation * ha = (Okular::HighlightAnnotation *) a;
Okular::HighlightAnnotation::HighlightType type = ha->highlightType();
// draw each quad of the annotation
int quads = ha->highlightQuads().size();
for ( int q = 0; q < quads; q++ )
{
NormalizedPath path;
const Okular::HighlightAnnotation::Quad & quad = ha->highlightQuads()[ q ];
// normalize page point to image
for ( int i = 0; i < 4; i++ )
{
Okular::NormalizedPoint point;
point.x = (quad.transformedPoint( i ).x - xOffset) * xScale;
point.y = (quad.transformedPoint( i ).y - yOffset) * yScale;
path.append( point );
}
// draw the normalized path into image
switch ( type )
{
// highlight the whole rect
case Okular::HighlightAnnotation::Highlight:
drawShapeOnImage( backImage, path, true, Qt::NoPen, acolor, pageScale, Multiply );
break;
// highlight the bottom part of the rect
case Okular::HighlightAnnotation::Squiggly:
path[ 3 ].x = ( path[ 0 ].x + path[ 3 ].x ) / 2.0;
path[ 3 ].y = ( path[ 0 ].y + path[ 3 ].y ) / 2.0;
path[ 2 ].x = ( path[ 1 ].x + path[ 2 ].x ) / 2.0;
path[ 2 ].y = ( path[ 1 ].y + path[ 2 ].y ) / 2.0;
drawShapeOnImage( backImage, path, true, Qt::NoPen, acolor, pageScale, Multiply );
break;
// make a line at 3/4 of the height
case Okular::HighlightAnnotation::Underline:
path[ 0 ].x = ( 3 * path[ 0 ].x + path[ 3 ].x ) / 4.0;
path[ 0 ].y = ( 3 * path[ 0 ].y + path[ 3 ].y ) / 4.0;
path[ 1 ].x = ( 3 * path[ 1 ].x + path[ 2 ].x ) / 4.0;
path[ 1 ].y = ( 3 * path[ 1 ].y + path[ 2 ].y ) / 4.0;
path.pop_back();
path.pop_back();
drawShapeOnImage( backImage, path, false, QPen( acolor, 2 ), QBrush(), pageScale );
break;
// make a line at 1/2 of the height
case Okular::HighlightAnnotation::StrikeOut:
path[ 0 ].x = ( path[ 0 ].x + path[ 3 ].x ) / 2.0;
path[ 0 ].y = ( path[ 0 ].y + path[ 3 ].y ) / 2.0;
path[ 1 ].x = ( path[ 1 ].x + path[ 2 ].x ) / 2.0;
path[ 1 ].y = ( path[ 1 ].y + path[ 2 ].y ) / 2.0;
path.pop_back();
path.pop_back();
drawShapeOnImage( backImage, path, false, QPen( acolor, 2 ), QBrush(), pageScale );
break;
}
}
}
// draw InkAnnotation MISSING:invar width, PENTRACER
else if ( type == Okular::Annotation::AInk )
{
// get the annotation
Okular::InkAnnotation * ia = (Okular::InkAnnotation *) a;
// draw each ink path
const QList< QLinkedList<Okular::NormalizedPoint> > transformedInkPaths = ia->transformedInkPaths();
const QPen inkPen = buildPen( a, a->style().width(), acolor );
int paths = transformedInkPaths.size();
for ( int p = 0; p < paths; p++ )
{
NormalizedPath path;
const QLinkedList<Okular::NormalizedPoint> & inkPath = transformedInkPaths[ p ];
// normalize page point to image
QLinkedList<Okular::NormalizedPoint>::const_iterator pIt = inkPath.constBegin(), pEnd = inkPath.constEnd();
for ( ; pIt != pEnd; ++pIt )
{
const Okular::NormalizedPoint & inkPoint = *pIt;
Okular::NormalizedPoint point;
point.x = (inkPoint.x - xOffset) * xScale;
point.y = (inkPoint.y - yOffset) * yScale;
path.append( point );
}
// draw the normalized path into image
drawShapeOnImage( backImage, path, false, inkPen, QBrush(), pageScale );
}
}
} // end current annotation drawing
}
if(viewPortPoint)
{
QPainter painter(&backImage);
painter.translate( -limits.left(), -limits.top() );
painter.setPen( QApplication::palette().color( QPalette::Active, QPalette::Highlight ) );
painter.drawLine( 0, viewPortPoint->y * scaledHeight + 1, scaledWidth - 1, viewPortPoint->y * scaledHeight + 1 );
// ROTATION CURRENTLY NOT IMPLEMENTED
/*
if( page->rotation() == Okular::Rotation0)
{
}
else if(page->rotation() == Okular::Rotation270)
{
painter.drawLine( viewPortPoint->y * scaledHeight + 1, 0, viewPortPoint->y * scaledHeight + 1, scaledWidth - 1);
}
else if(page->rotation() == Okular::Rotation180)
{
painter.drawLine( 0, (1.0 - viewPortPoint->y) * scaledHeight - 1, scaledWidth - 1, (1.0 - viewPortPoint->y) * scaledHeight - 1 );
}
else if(page->rotation() == Okular::Rotation90) // not right, rotation clock-wise
{
painter.drawLine( scaledWidth - (viewPortPoint->y * scaledHeight + 1), 0, scaledWidth - (viewPortPoint->y * scaledHeight + 1), scaledWidth - 1);
}
*/
}
// 4B.5. create the back pixmap converting from the local image
backPixmap = new QPixmap( QPixmap::fromImage( backImage ) );
backPixmap->setDevicePixelRatio(dpr);
// 4B.6. create a painter over the pixmap and set it as the active one
mixedPainter = new QPainter( backPixmap );
mixedPainter->translate( -limits.left(), -limits.top() );
}
/** 5 -- MIXED FLOW. Draw ANNOTATIONS [OPAQUE ONES] on ACTIVE PAINTER **/
if ( unbufferedAnnotations )
{
// iterate over annotations and paint AText, AGeom, AStamp
QList< Okular::Annotation * >::const_iterator aIt = unbufferedAnnotations->constBegin(), aEnd = unbufferedAnnotations->constEnd();
for ( ; aIt != aEnd; ++aIt )
{
Okular::Annotation * a = *aIt;
// honor opacity settings on supported types
unsigned int opacity = (unsigned int)( 255.0 * a->style().opacity() );
// skip the annotation drawing if all the annotation is fully
// transparent, but not with text annotations
if ( opacity <= 0 && a->subType() != Okular::Annotation::AText )
continue;
QColor acolor = a->style().color();
if ( !acolor.isValid() )
acolor = Qt::yellow;
acolor.setAlpha( opacity );
// get annotation boundary and drawn rect
QRect annotBoundary = a->transformedBoundingRectangle().geometry( scaledWidth, scaledHeight ).translated( -scaledCrop.topLeft() );
QRect annotRect = annotBoundary.intersected( limits );
QRect innerRect( annotRect.left() - annotBoundary.left(), annotRect.top() -
annotBoundary.top(), annotRect.width(), annotRect.height() );
QRectF dInnerRect(innerRect.x() * dpr, innerRect.y() * dpr, innerRect.width() * dpr, innerRect.height() * dpr);
Okular::Annotation::SubType type = a->subType();
// draw TextAnnotation
if ( type == Okular::Annotation::AText )
{
Okular::TextAnnotation * text = (Okular::TextAnnotation *)a;
if ( text->textType() == Okular::TextAnnotation::InPlace )
{
QImage image( annotBoundary.size(), QImage::Format_ARGB32 );
image.fill( acolor.rgba() );
QPainter painter( &image );
painter.setFont( text->textFont() );
Qt::AlignmentFlag halign = ( text->inplaceAlignment() == 1 ? Qt::AlignHCenter : ( text->inplaceAlignment() == 2 ? Qt::AlignRight : Qt::AlignLeft ) );
const double invXScale = (double)page->width() / scaledWidth;
const double invYScale = (double)page->height() / scaledHeight;
const double borderWidth = text->style().width();
painter.scale( 1 / invXScale, 1 / invYScale );
painter.drawText( borderWidth * invXScale, borderWidth * invYScale,
(image.width() - 2 * borderWidth) * invXScale,
(image.height() - 2 * borderWidth) * invYScale,
Qt::AlignTop | halign | Qt::TextWrapAnywhere,
text->contents() );
painter.resetTransform();
//Required as asking for a zero width pen results
//in a default width pen (1.0) being created
if ( borderWidth != 0 )
{
QPen pen( Qt::black, borderWidth );
painter.setPen( pen );
painter.drawRect( 0, 0, image.width() - 1, image.height() - 1 );
}
painter.end();
mixedPainter->drawImage( annotBoundary.topLeft(), image );
}
else if ( text->textType() == Okular::TextAnnotation::Linked )
{
// get pixmap, colorize and alpha-blend it
QString path;
QPixmap pixmap = GuiUtils::iconLoader()->loadIcon( text->textIcon().toLower(), KIconLoader::User, 32, KIconLoader::DefaultState, QStringList(), &path, true );
if ( path.isEmpty() )
pixmap = GuiUtils::iconLoader()->loadIcon( text->textIcon().toLower(), KIconLoader::NoGroup, 32 );
QRect annotBoundary2 = QRect( annotBoundary.topLeft(), QSize( TEXTANNOTATION_ICONSIZE * dpr, TEXTANNOTATION_ICONSIZE * dpr ) );
QRect annotRect2 = annotBoundary2.intersected( limits );
QRect innerRect2( annotRect2.left() - annotBoundary2.left(), annotRect2.top() -
annotBoundary2.top(), annotRect2.width(), annotRect2.height() );
QPixmap scaledCroppedPixmap = pixmap.scaled(TEXTANNOTATION_ICONSIZE * dpr, TEXTANNOTATION_ICONSIZE * dpr).copy(dInnerRect.toAlignedRect());
scaledCroppedPixmap.setDevicePixelRatio(dpr);
QImage scaledCroppedImage = scaledCroppedPixmap.toImage();
// if the annotation color is valid (ie it was set), then
// use it to colorize the icon, otherwise the icon will be
// "gray"
if ( a->style().color().isValid() )
GuiUtils::colorizeImage( scaledCroppedImage, a->style().color(), opacity );
pixmap = QPixmap::fromImage( scaledCroppedImage );
// draw the mangled image to painter
mixedPainter->drawPixmap( annotRect.topLeft(), pixmap);
}
}
// draw StampAnnotation
else if ( type == Okular::Annotation::AStamp )
{
Okular::StampAnnotation * stamp = (Okular::StampAnnotation *)a;
// get pixmap and alpha blend it if needed
QPixmap pixmap = GuiUtils::loadStamp( stamp->stampIconName(), annotBoundary.size() );
if ( !pixmap.isNull() ) // should never happen but can happen on huge sizes
{
const QRect dInnerRect(QRectF(innerRect.x() * dpr, innerRect.y() * dpr, innerRect.width() * dpr, innerRect.height() * dpr).toAlignedRect());
QPixmap scaledCroppedPixmap = pixmap.scaled(annotBoundary.width() * dpr, annotBoundary.height() * dpr).copy(dInnerRect);
scaledCroppedPixmap.setDevicePixelRatio(dpr);
QImage scaledCroppedImage = scaledCroppedPixmap.toImage();
if ( opacity < 255 )
changeImageAlpha( scaledCroppedImage, opacity );
pixmap = QPixmap::fromImage( scaledCroppedImage );
// draw the scaled and al
mixedPainter->drawPixmap( annotRect.topLeft(), pixmap );
}
}
// draw GeomAnnotation
else if ( type == Okular::Annotation::AGeom )
{
Okular::GeomAnnotation * geom = (Okular::GeomAnnotation *)a;
// check whether there's anything to draw
if ( geom->style().width() || geom->geometricalInnerColor().isValid() )
{
mixedPainter->save();
const double width = geom->style().width() * Okular::Utils::realDpi(nullptr).width() / ( 72.0 * 2.0 ) * scaledWidth / page->width();
QRectF r( .0, .0, annotBoundary.width(), annotBoundary.height() );
r.adjust( width, width, -width, -width );
r.translate( annotBoundary.topLeft() );
if ( geom->geometricalInnerColor().isValid() )
{
r.adjust( width, width, -width, -width );
const QColor color = geom->geometricalInnerColor();
mixedPainter->setPen( Qt::NoPen );
mixedPainter->setBrush( QColor( color.red(), color.green(), color.blue(), opacity ) );
if ( geom->geometricalType() == Okular::GeomAnnotation::InscribedSquare )
mixedPainter->drawRect( r );
else
mixedPainter->drawEllipse( r );
r.adjust( -width, -width, width, width );
}
if ( geom->style().width() ) // need to check the original size here..
{
mixedPainter->setPen( buildPen( a, width * 2, acolor ) );
mixedPainter->setBrush( Qt::NoBrush );
if ( geom->geometricalType() == Okular::GeomAnnotation::InscribedSquare )
mixedPainter->drawRect( r );
else
mixedPainter->drawEllipse( r );
}
mixedPainter->restore();
}
}
// draw extents rectangle
if ( Okular::Settings::debugDrawAnnotationRect() )
{
mixedPainter->setPen( a->style().color() );
mixedPainter->drawRect( annotBoundary );
}
}
}
if ( boundingRectOnlyAnn )
{
QRect annotBoundary = boundingRectOnlyAnn->transformedBoundingRectangle().geometry( scaledWidth, scaledHeight ).translated( -scaledCrop.topLeft() );
mixedPainter->setPen( Qt::DashLine );
mixedPainter->drawRect( annotBoundary );
}
/** 6 -- MIXED FLOW. Draw LINKS+IMAGES BORDER on ACTIVE PAINTER **/
if ( enhanceLinks || enhanceImages )
{
mixedPainter->save();
mixedPainter->scale( scaledWidth, scaledHeight );
mixedPainter->translate( -crop.left, -crop.top );
QColor normalColor = QApplication::palette().color( QPalette::Active, QPalette::Highlight );
// enlarging limits for intersection is like growing the 'rectGeometry' below
QRect limitsEnlarged = limits;
limitsEnlarged.adjust( -2, -2, 2, 2 );
// draw rects that are inside the 'limits' paint region as opaque rects
QLinkedList< Okular::ObjectRect * >::const_iterator lIt = page->m_rects.constBegin(), lEnd = page->m_rects.constEnd();
for ( ; lIt != lEnd; ++lIt )
{
Okular::ObjectRect * rect = *lIt;
if ( (enhanceLinks && rect->objectType() == Okular::ObjectRect::Action) ||
(enhanceImages && rect->objectType() == Okular::ObjectRect::Image) )
{
if ( limitsEnlarged.intersects( rect->boundingRect( scaledWidth, scaledHeight ).translated( -scaledCrop.topLeft() ) ) )
{
mixedPainter->strokePath( rect->region(), QPen( normalColor, 0 ) );
}
}
}
mixedPainter->restore();
}
/** 7 -- BUFFERED FLOW. Copy BACKPIXMAP on DESTINATION PAINTER **/
if ( useBackBuffer )
{
delete mixedPainter;
destPainter->drawPixmap( limits.left(), limits.top(), *backPixmap );
delete backPixmap;
}
// delete object containers
delete bufferedHighlights;
delete bufferedAnnotations;
delete unbufferedAnnotations;
}
/** Private Helpers :: Pixmap conversion **/
void PagePainter::cropPixmapOnImage( QImage & dest, const QPixmap * src, const QRect & r )
{
qreal dpr = src->devicePixelRatioF();
// handle quickly the case in which the whole pixmap has to be converted
if ( r == QRect( 0, 0, src->width() / dpr, src->height() / dpr ) )
{
dest = src->toImage();
dest = dest.convertToFormat(QImage::Format_ARGB32_Premultiplied);
}
// else copy a portion of the src to an internal pixmap (smaller) and convert it
else
{
QImage croppedImage( r.width() * dpr, r.height() * dpr, QImage::Format_ARGB32_Premultiplied );
croppedImage.setDevicePixelRatio(dpr);
QPainter p( &croppedImage );
p.drawPixmap( 0, 0, *src, r.left(), r.top(), r.width(), r.height() );
p.end();
dest = croppedImage;
}
}
void PagePainter::recolor(QImage *image, const QColor &foreground, const QColor &background)
{
if (image->format() != QImage::Format_ARGB32_Premultiplied) {
qCWarning(OkularUiDebug) << "Wrong image format! Converting...";
*image = image->convertToFormat(QImage::Format_ARGB32_Premultiplied);
}
Q_ASSERT(image->format() == QImage::Format_ARGB32_Premultiplied);
const float scaleRed = background.redF() - foreground.redF();
const float scaleGreen = background.greenF() - foreground.greenF();
const float scaleBlue = background.blueF() - foreground.blueF();
for (int y=0; y<image->height(); y++) {
QRgb *pixels = reinterpret_cast<QRgb*>(image->scanLine(y));
for (int x=0; x<image->width(); x++) {
const int lightness = qGray(pixels[x]);
pixels[x] = qRgba(scaleRed * lightness + foreground.red(),
scaleGreen * lightness + foreground.green(),
scaleBlue * lightness + foreground.blue(),
qAlpha(pixels[x]));
}
}
}
/** Private Helpers :: Image Drawing **/
// from Arthur - qt4
static inline int qt_div_255(int x) { return (x + (x>>8) + 0x80) >> 8; }
void PagePainter::changeImageAlpha( QImage & image, unsigned int destAlpha )
{
// iterate over all pixels changing the alpha component value
unsigned int * data = (unsigned int *)image.bits();
unsigned int pixels = image.width() * image.height();
int source, sourceAlpha;
for( unsigned int i = 0; i < pixels; ++i )
{ // optimize this loop keeping byte order into account
source = data[i];
if ( (sourceAlpha = qAlpha( source )) == 255 )
{
// use destAlpha
data[i] = qRgba( qRed(source), qGreen(source), qBlue(source), destAlpha );
}
else
{
// use destAlpha * sourceAlpha product
sourceAlpha = qt_div_255( destAlpha * sourceAlpha );
data[i] = qRgba( qRed(source), qGreen(source), qBlue(source), sourceAlpha );
}
}
}
void PagePainter::drawShapeOnImage(
QImage & image,
const NormalizedPath & normPath,
bool closeShape,
const QPen & pen,
const QBrush & brush,
double penWidthMultiplier,
RasterOperation op
//float antiAliasRadius
)
{
// safety checks
int pointsNumber = normPath.size();
if ( pointsNumber < 2 )
return;
int imageWidth = image.width();
int imageHeight = image.height();
double fImageWidth = (double)imageWidth;
double fImageHeight = (double)imageHeight;
// stroke outline
double penWidth = (double)pen.width() * penWidthMultiplier;
QPainter painter(&image);
painter.setRenderHint(QPainter::Antialiasing);
QPen pen2 = pen;
pen2.setWidthF(penWidth);
painter.setPen(pen2);
painter.setBrush(brush);
if (op == Multiply) {
painter.setCompositionMode(QPainter::CompositionMode_Multiply);
}
if ( brush.style() == Qt::NoBrush )
{
// create a polygon
QPolygonF poly( closeShape ? pointsNumber + 1 : pointsNumber );
for ( int i = 0; i < pointsNumber; ++i )
{
poly[ i ] = QPointF( normPath[ i ].x * fImageWidth, normPath[ i ].y * fImageHeight );
}
if ( closeShape )
poly[ pointsNumber ] = poly[ 0 ];
painter.drawPolyline( poly );
}
else
{
// create a 'path'
QPainterPath path;
path.setFillRule( Qt::WindingFill );
path.moveTo( normPath[ 0 ].x * fImageWidth, normPath[ 0 ].y * fImageHeight );
for ( int i = 1; i < pointsNumber; i++ )
{
path.lineTo( normPath[ i ].x * fImageWidth, normPath[ i ].y * fImageHeight );
}
if ( closeShape )
path.closeSubpath();
painter.drawPath( path );
}
}
/* kate: replace-tabs on; indent-width 4; */