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okular/gui/pagepainter.cpp

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/*
SPDX-FileCopyrightText: 2005 Enrico Ros <eros.kde@email.it>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "pagepainter.h"
// qt / kde includes
#include <QApplication>
#include <QDebug>
#include <QIcon>
#include <QPainter>
#include <QPalette>
#include <QPixmap>
#include <QRect>
#include <QTransform>
#include <QVarLengthArray>
// system includes
#include <math.h>
// local includes
#include "core/annotations.h"
#include "core/observer.h"
#include "core/page.h"
#include "core/page_p.h"
#include "core/tile.h"
#include "core/utils.h"
#include "debug_ui.h"
#include "guiutils.h"
#include "settings.h"
#include "settings_core.h"
Q_GLOBAL_STATIC_WITH_ARGS(QPixmap, busyPixmap, (QIcon::fromTheme(QLatin1String("okular")).pixmap(48)))
#define TEXTANNOTATION_ICONSIZE 24
inline QPen buildPen(const Okular::Annotation *ann, double width, const QColor &color)
{
QColor c = color;
c.setAlphaF(ann->style().opacity());
QPen p(QBrush(c), 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:
case Okular::SettingsCore::EnumRenderMode::InvertLightness:
case Okular::SettingsCore::EnumRenderMode::InvertLuma:
case Okular::SettingsCore::EnumRenderMode::InvertLumaSymmetric:
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 != nullptr) {
pixmap = *p;
}
/** 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);
Okular::HighlightAreaRect::const_iterator hIt;
for (const Okular::HighlightAreaRect *highlight : page->m_highlights) {
for (hIt = highlight->constBegin(); hIt != highlight->constEnd(); ++hIt) {
if ((*hIt).intersects(limitRect)) {
bufferedHighlights->append(qMakePair(highlight->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) {
for (Okular::Annotation *ann : page->m_annotations) {
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;
QRectF tileRect = tile.rect().geometryF(scaledWidth, scaledHeight).translated(-scaledCrop.topLeft());
QRect dTileRect = tile.rect().geometry(dScaledWidth, dScaledHeight).translated(-dScaledCrop.topLeft());
QRectF limitsInTile = QRectF(limits) & tileRect;
QRect dLimitsInTile = dLimits & dTileRect;
if (!limitsInTile.isEmpty()) {
QPixmap *tilePixmap = tile.pixmap();
if (tilePixmap->width() == dTileRect.width() && tilePixmap->height() == dTileRect.height()) {
destPainter->drawPixmap(limitsInTile, *tilePixmap, dLimitsInTile.translated(-dTileRect.topLeft()));
} else {
destPainter->drawPixmap(tileRect, *tilePixmap, tilePixmap->rect());
}
}
tIt++;
}
} else {
destPainter->drawPixmap(limits, pixmap.scaled(dScaledWidth, dScaledHeight), dLimitsInPixmap);
}
// 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;
QRectF tileRect = tile.rect().geometryF(scaledWidth, scaledHeight).translated(-scaledCrop.topLeft());
QRect dTileRect = tile.rect().geometry(dScaledWidth, dScaledHeight).translated(-dScaledCrop.topLeft());
QRectF limitsInTile = QRectF(limits) & tileRect;
QRect dLimitsInTile = dLimits & dTileRect;
if (!limitsInTile.isEmpty()) {
QPixmap *tilePixmap = tile.pixmap();
if (tilePixmap->width() == dTileRect.width() && tilePixmap->height() == dTileRect.height()) {
p.drawPixmap(limitsInTile.translated(-limits.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
p.drawPixmap(QRectF(0, 0, limits.width(), limits.height()), pixmap.scaled(dScaledWidth, dScaledHeight), dLimitsInPixmap);
}
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:
blackWhite(&backImage, Okular::Settings::bWContrast(), Okular::Settings::bWThreshold());
break;
case Okular::SettingsCore::EnumRenderMode::InvertLightness:
invertLightness(&backImage);
break;
case Okular::SettingsCore::EnumRenderMode::InvertLuma:
invertLuma(&backImage, 0.2126, 0.7152, 0.0722); // sRGB / Rec. 709 luma coefficients
break;
case Okular::SettingsCore::EnumRenderMode::InvertLumaSymmetric:
invertLuma(&backImage, 0.3333, 0.3334, 0.3333); // Symmetric coefficients, to keep colors saturated.
break;
case Okular::SettingsCore::EnumRenderMode::HueShiftPositive:
hueShiftPositive(&backImage);
break;
case Okular::SettingsCore::EnumRenderMode::HueShiftNegative:
hueShiftNegative(&backImage);
break;
}
}
// 4B.3. highlight rects in page
if (bufferedHighlights) {
// draw highlights that are inside the 'limits' paint region
for (const auto &highlight : qAsConst(*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);
auto frameColor = highlightColor.darker(150);
const QRect frameRect = r.geometry(scaledWidth, scaledHeight).translated(-scaledCrop.topLeft()).translated(-limits.left(), -limits.top());
painter.setPen(frameColor);
painter.drawRect(frameRect);
}
}
// 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: caption, dash pattern, endings for multipoint lines
if (type == Okular::Annotation::ALine) {
LineAnnotPainter linepainter {(Okular::LineAnnotation *)a, {page->width(), page->height()}, pageScale, {xScale, 0., 0., yScale, -xOffset * xScale, -yOffset * yScale}};
linepainter.draw(backImage);
}
// 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<QList<Okular::NormalizedPoint>> transformedInkPaths = ia->transformedInkPaths();
const QPen inkPen = buildPen(a, a->style().width(), acolor);
for (const QList<Okular::NormalizedPoint> &inkPath : transformedInkPaths) {
// normalize page point to image
NormalizedPath path;
for (const Okular::NormalizedPoint &inkPoint : inkPath) {
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)(a->style().color().alpha() * 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);
// Annotation boundary in destPainter coordinates:
QRect annotBoundary = a->transformedBoundingRectangle().geometry(scaledWidth, scaledHeight).translated(-scaledCrop.topLeft());
QRect annotRect = annotBoundary.intersected(limits);
// Visible portion of the annotation at annotBoundary size:
QRect innerRect = annotRect.translated(-annotBoundary.topLeft());
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());
painter.setPen(text->textColor());
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::TextWordWrap, 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
QPixmap pixmap = QIcon::fromTheme(text->textIcon().toLower()).pixmap(32);
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 = Okular::AnnotationUtils::loadStamp(stamp->stampIconName(), qMax(annotBoundary.width(), annotBoundary.height()) * dpr);
if (!pixmap.isNull()) // should never happen but can happen on huge sizes
{
// Draw pixmap with opacity:
mixedPainter->save();
mixedPainter->setOpacity(mixedPainter->opacity() * opacity / 255.0);
mixedPainter->drawPixmap(annotRect.topLeft(), pixmap.scaled(annotBoundary.width() * dpr, annotBoundary.height() * dpr), dInnerRect.toAlignedRect());
mixedPainter->restore();
}
}
// 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
for (Okular::ObjectRect *rect : page->m_rects) {
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;
}
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();
const int foreground_red = foreground.red();
const int foreground_green = foreground.green();
const int foreground_blue = foreground.blue();
QRgb *data = reinterpret_cast<QRgb *>(image->bits());
const int pixels = image->width() * image->height();
for (int i = 0; i < pixels; ++i) {
const int lightness = qGray(data[i]);
const float r = scaleRed * lightness + foreground_red;
const float g = scaleGreen * lightness + foreground_green;
const float b = scaleBlue * lightness + foreground_blue;
const unsigned a = qAlpha(data[i]);
data[i] = qRgba(r, g, b, a);
}
}
void PagePainter::blackWhite(QImage *image, int contrast, int threshold)
{
unsigned int *data = reinterpret_cast<unsigned int *>(image->bits());
int con = contrast;
int thr = 255 - threshold;
int pixels = image->width() * image->height();
for (int i = 0; i < pixels; ++i) {
// Piecewise linear function of val, through (0, 0), (thr, 128), (255, 255)
int val = qGray(data[i]);
if (val > thr) {
val = 128 + (127 * (val - thr)) / (255 - thr);
} else if (val < thr) {
val = (128 * val) / thr;
}
// Linear contrast stretching through (thr, thr)
if (con > 2) {
val = thr + (val - thr) * con / 2;
val = qBound(0, val, 255);
}
const unsigned a = qAlpha(data[i]);
data[i] = qRgba(val, val, val, a);
}
}
void PagePainter::invertLightness(QImage *image)
{
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);
QRgb *data = reinterpret_cast<QRgb *>(image->bits());
int pixels = image->width() * image->height();
for (int i = 0; i < pixels; ++i) {
// Invert lightness of the pixel using the cylindric HSL color model.
// Algorithm is based on https://en.wikipedia.org/wiki/HSL_and_HSV#HSL_to_RGB (2019-03-17).
// Important simplifications are that inverting lightness does not change chroma and hue.
// This means the sector (of the chroma/hue plane) is not changed,
// so we can use a linear calculation after determining the sector using qMin() and qMax().
uchar R = qRed(data[i]);
uchar G = qGreen(data[i]);
uchar B = qBlue(data[i]);
// Get only the needed HSL components. These are chroma C and the common component m.
// Get common component m
uchar m = qMin(R, qMin(G, B));
// Remove m from color components
R -= m;
G -= m;
B -= m;
// Get chroma C
uchar C = qMax(R, qMax(G, B));
// Get common component m' after inverting lightness L.
// Hint: Lightness L = m + C / 2; L' = 255 - L = 255 - (m + C / 2) => m' = 255 - C - m
uchar m_ = 255 - C - m;
// Add m' to color compontents
R += m_;
G += m_;
B += m_;
// Save new color
const unsigned A = qAlpha(data[i]);
data[i] = qRgba(R, G, B, A);
}
}
void PagePainter::invertLuma(QImage *image, float Y_R, float Y_G, float Y_B)
{
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);
QRgb *data = reinterpret_cast<QRgb *>(image->bits());
int pixels = image->width() * image->height();
for (int i = 0; i < pixels; ++i) {
uchar R = qRed(data[i]);
uchar G = qGreen(data[i]);
uchar B = qBlue(data[i]);
invertLumaPixel(R, G, B, Y_R, Y_G, Y_B);
// Save new color
const unsigned A = qAlpha(data[i]);
data[i] = qRgba(R, G, B, A);
}
}
void PagePainter::invertLumaPixel(uchar &R, uchar &G, uchar &B, float Y_R, float Y_G, float Y_B)
{
// Invert luma of the pixel using the bicone HCY color model, stretched to cylindric HSY.
// Algorithm is based on https://en.wikipedia.org/wiki/HSL_and_HSV#Luma,_chroma_and_hue_to_RGB (2019-03-19).
// For an illustration see https://experilous.com/1/product/make-it-colorful/ (2019-03-19).
// Special case: The algorithm does not work when hue is undefined.
if (R == G && G == B) {
R = 255 - R;
G = 255 - G;
B = 255 - B;
return;
}
// Get input and output luma Y, Y_inv in range 0..255
float Y = R * Y_R + G * Y_G + B * Y_B;
float Y_inv = 255 - Y;
// Get common component m and remove from color components.
// This moves us to the bottom faces of the HCY bicone, i. e. we get C and X in R, G, B.
uint_fast8_t m = qMin(R, qMin(G, B));
R -= m;
G -= m;
B -= m;
// We operate in a hue plane of the luma/chroma/hue bicone.
// The hue plane is a triangle.
// This bicone is distorted, so we can not simply mirror the triangle.
// We need to stretch it to a luma/saturation rectangle, so we need to stretch chroma C and the proportional X.
// First, we need to calculate luma Y_full_C for the outer corner of the triangle.
// Then we can interpolate the max chroma C_max, C_inv_max for our luma Y, Y_inv.
// Then we calculate C_inv and X_inv by scaling them by the ratio of C_max and C_inv_max.
// Calculate luma Y_full_C (in range equivalent to gray 0..255) for chroma = 1 at this hue.
// Piecewise linear, with the corners of the bicone at the sum of one or two luma coefficients.
float Y_full_C;
if (R >= B && B >= G) {
Y_full_C = 255 * Y_R + 255 * Y_B * B / R;
} else if (R >= G && G >= B) {
Y_full_C = 255 * Y_R + 255 * Y_G * G / R;
} else if (G >= R && R >= B) {
Y_full_C = 255 * Y_G + 255 * Y_R * R / G;
} else if (G >= B && B >= R) {
Y_full_C = 255 * Y_G + 255 * Y_B * B / G;
} else if (B >= G && G >= R) {
Y_full_C = 255 * Y_B + 255 * Y_G * G / B;
} else {
Y_full_C = 255 * Y_B + 255 * Y_R * R / B;
}
// Calculate C_max, C_inv_max, to scale C and X.
float C_max, C_inv_max;
if (Y >= Y_full_C) {
C_max = Y_inv / (255 - Y_full_C);
} else {
C_max = Y / Y_full_C;
}
if (Y_inv >= Y_full_C) {
C_inv_max = Y / (255 - Y_full_C);
} else {
C_inv_max = Y_inv / Y_full_C;
}
// Scale C and X. C and X already lie in R, G, B.
float C_scale = C_inv_max / C_max;
float R_ = R * C_scale;
float G_ = G * C_scale;
float B_ = B * C_scale;
// Calculate missing luma (in range 0..255), to get common component m_inv
float m_inv = Y_inv - (Y_R * R_ + Y_G * G_ + Y_B * B_);
// Add m_inv to color compontents
R_ += m_inv;
G_ += m_inv;
B_ += m_inv;
// Return colors rounded
R = R_ + 0.5;
G = G_ + 0.5;
B = B_ + 0.5;
}
void PagePainter::hueShiftPositive(QImage *image)
{
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);
QRgb *data = reinterpret_cast<QRgb *>(image->bits());
int pixels = image->width() * image->height();
for (int i = 0; i < pixels; ++i) {
uchar R = qRed(data[i]);
uchar G = qGreen(data[i]);
uchar B = qBlue(data[i]);
// Save new color
const unsigned A = qAlpha(data[i]);
data[i] = qRgba(B, R, G, A);
}
}
void PagePainter::hueShiftNegative(QImage *image)
{
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);
QRgb *data = reinterpret_cast<QRgb *>(image->bits());
int pixels = image->width() * image->height();
for (int i = 0; i < pixels; ++i) {
uchar R = qRed(data[i]);
uchar G = qGreen(data[i]);
uchar B = qBlue(data[i]);
// Save new color
const unsigned A = qAlpha(data[i]);
data[i] = qRgba(G, B, R, A);
}
}
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;
}
const double dpr = image.devicePixelRatio();
const double fImageWidth = image.width() / dpr;
const double fImageHeight = image.height() / dpr;
// 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);
}
}
void PagePainter::drawEllipseOnImage(QImage &image, const NormalizedPath &rect, const QPen &pen, const QBrush &brush, double penWidthMultiplier, RasterOperation op)
{
const double dpr = image.devicePixelRatio();
const double fImageWidth = image.width() / dpr;
const double fImageHeight = image.height() / dpr;
// stroke outline
const 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);
}
const QPointF &topLeft {rect[0].x * fImageWidth, rect[0].y * fImageHeight};
const QSizeF &size {(rect[1].x - rect[0].x) * fImageWidth, (rect[1].y - rect[0].y) * fImageHeight};
const QRectF imgRect {topLeft, size};
if (brush.style() == Qt::NoBrush) {
painter.drawArc(imgRect, 0, 16 * 360);
} else {
painter.drawEllipse(imgRect);
}
}
LineAnnotPainter::LineAnnotPainter(const Okular::LineAnnotation *a, QSizeF pageSize, double pageScale, const QTransform &toNormalizedImage)
: la {a}
, pageSize {pageSize}
, pageScale {pageScale}
, toNormalizedImage {toNormalizedImage}
, aspectRatio {pageSize.height() / pageSize.width()}
, linePen {buildPen(a, a->style().width(), a->style().color())}
{
if ((la->lineClosed() || la->transformedLinePoints().count() == 2) && la->lineInnerColor().isValid()) {
fillBrush = QBrush(la->lineInnerColor());
}
}
void LineAnnotPainter::draw(QImage &image) const
{
const QList<Okular::NormalizedPoint> transformedLinePoints = la->transformedLinePoints();
if (transformedLinePoints.count() == 2) {
const Okular::NormalizedPoint delta {transformedLinePoints.last().x - transformedLinePoints.first().x, transformedLinePoints.first().y - transformedLinePoints.last().y};
const double angle {atan2(delta.y * aspectRatio, delta.x)};
const double cosA {cos(-angle)};
const double sinA {sin(-angle)};
const QTransform tmpMatrix = QTransform {cosA, sinA / aspectRatio, -sinA, cosA / aspectRatio, transformedLinePoints.first().x, transformedLinePoints.first().y};
const double deaspectedY {delta.y * aspectRatio};
const double mainSegmentLength {sqrt(delta.x * delta.x + deaspectedY * deaspectedY)};
const double lineendSize {std::min(6. * la->style().width() / pageSize.width(), mainSegmentLength / 2.)};
drawShortenedLine(mainSegmentLength, lineendSize, image, tmpMatrix);
drawLineEnds(mainSegmentLength, lineendSize, image, tmpMatrix);
drawLeaderLine(0., image, tmpMatrix);
drawLeaderLine(mainSegmentLength, image, tmpMatrix);
} else if (transformedLinePoints.count() > 2) {
drawMainLine(image);
}
}
void LineAnnotPainter::drawMainLine(QImage &image) const
{
// draw the line as normalized path into image
PagePainter::drawShapeOnImage(image, transformPath(la->transformedLinePoints(), toNormalizedImage), la->lineClosed(), linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawShortenedLine(double mainSegmentLength, double size, QImage &image, const QTransform &toNormalizedPage) const
{
const QTransform combinedTransform {toNormalizedPage * toNormalizedImage};
const QList<Okular::NormalizedPoint> path {{shortenForArrow(size, la->lineStartStyle()), 0}, {mainSegmentLength - shortenForArrow(size, la->lineEndStyle()), 0}};
PagePainter::drawShapeOnImage(image, transformPath(path, combinedTransform), la->lineClosed(), linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawLineEnds(double mainSegmentLength, double size, QImage &image, const QTransform &transform) const
{
switch (la->lineStartStyle()) {
case Okular::LineAnnotation::Square:
drawLineEndSquare(0, -size, transform, image);
break;
case Okular::LineAnnotation::Circle:
drawLineEndCircle(0, -size, transform, image);
break;
case Okular::LineAnnotation::Diamond:
drawLineEndDiamond(0, -size, transform, image);
break;
case Okular::LineAnnotation::OpenArrow:
drawLineEndArrow(0, -size, 1., false, transform, image);
break;
case Okular::LineAnnotation::ClosedArrow:
drawLineEndArrow(0, -size, 1., true, transform, image);
break;
case Okular::LineAnnotation::None:
break;
case Okular::LineAnnotation::Butt:
drawLineEndButt(0, size, transform, image);
break;
case Okular::LineAnnotation::ROpenArrow:
drawLineEndArrow(0, size, 1., false, transform, image);
break;
case Okular::LineAnnotation::RClosedArrow:
drawLineEndArrow(0, size, 1., true, transform, image);
break;
case Okular::LineAnnotation::Slash:
drawLineEndSlash(0, -size, transform, image);
break;
}
switch (la->lineEndStyle()) {
case Okular::LineAnnotation::Square:
drawLineEndSquare(mainSegmentLength, size, transform, image);
break;
case Okular::LineAnnotation::Circle:
drawLineEndCircle(mainSegmentLength, size, transform, image);
break;
case Okular::LineAnnotation::Diamond:
drawLineEndDiamond(mainSegmentLength, size, transform, image);
break;
case Okular::LineAnnotation::OpenArrow:
drawLineEndArrow(mainSegmentLength, size, 1., false, transform, image);
break;
case Okular::LineAnnotation::ClosedArrow:
drawLineEndArrow(mainSegmentLength, size, 1., true, transform, image);
break;
case Okular::LineAnnotation::None:
break;
case Okular::LineAnnotation::Butt:
drawLineEndButt(mainSegmentLength, size, transform, image);
break;
case Okular::LineAnnotation::ROpenArrow:
drawLineEndArrow(mainSegmentLength, size, -1., false, transform, image);
break;
case Okular::LineAnnotation::RClosedArrow:
drawLineEndArrow(mainSegmentLength, size, -1., true, transform, image);
break;
case Okular::LineAnnotation::Slash:
drawLineEndSlash(mainSegmentLength, size, transform, image);
break;
}
}
void LineAnnotPainter::drawLineEndArrow(double xEndPos, double size, double flipX, bool close, const QTransform &toNormalizedPage, QImage &image) const
{
const QTransform combinedTransform {toNormalizedPage * toNormalizedImage};
const QList<Okular::NormalizedPoint> path {
{xEndPos - size * flipX, size / 2.},
{xEndPos, 0},
{xEndPos - size * flipX, -size / 2.},
};
PagePainter::drawShapeOnImage(image, transformPath(path, combinedTransform), close, linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawLineEndButt(double xEndPos, double size, const QTransform &toNormalizedPage, QImage &image) const
{
const QTransform combinedTransform {toNormalizedPage * toNormalizedImage};
const double halfSize {size / 2.};
const QList<Okular::NormalizedPoint> path {
{xEndPos, halfSize},
{xEndPos, -halfSize},
};
PagePainter::drawShapeOnImage(image, transformPath(path, combinedTransform), true, linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawLineEndCircle(double xEndPos, double size, const QTransform &toNormalizedPage, QImage &image) const
{
/* transform the circle midpoint to intermediate normalized coordinates
* where it's easy to construct the bounding rect of the circle */
Okular::NormalizedPoint center;
toNormalizedPage.map(xEndPos - size / 2., 0, &center.x, &center.y);
const double halfSize {size / 2.};
const QList<Okular::NormalizedPoint> path {
{center.x - halfSize, center.y - halfSize / aspectRatio},
{center.x + halfSize, center.y + halfSize / aspectRatio},
};
/* then transform bounding rect with toNormalizedImage */
PagePainter::drawEllipseOnImage(image, transformPath(path, toNormalizedImage), linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawLineEndSquare(double xEndPos, double size, const QTransform &toNormalizedPage, QImage &image) const
{
const QTransform combinedTransform {toNormalizedPage * toNormalizedImage};
const QList<Okular::NormalizedPoint> path {{xEndPos, size / 2.}, {xEndPos - size, size / 2.}, {xEndPos - size, -size / 2.}, {xEndPos, -size / 2.}};
PagePainter::drawShapeOnImage(image, transformPath(path, combinedTransform), true, linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawLineEndDiamond(double xEndPos, double size, const QTransform &toNormalizedPage, QImage &image) const
{
const QTransform combinedTransform {toNormalizedPage * toNormalizedImage};
const QList<Okular::NormalizedPoint> path {{xEndPos, 0}, {xEndPos - size / 2., size / 2.}, {xEndPos - size, 0}, {xEndPos - size / 2., -size / 2.}};
PagePainter::drawShapeOnImage(image, transformPath(path, combinedTransform), true, linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawLineEndSlash(double xEndPos, double size, const QTransform &toNormalizedPage, QImage &image) const
{
const QTransform combinedTransform {toNormalizedPage * toNormalizedImage};
const double halfSize {size / 2.};
const double xOffset {cos(M_PI / 3.) * halfSize};
const QList<Okular::NormalizedPoint> path {
{xEndPos - xOffset, halfSize},
{xEndPos + xOffset, -halfSize},
};
PagePainter::drawShapeOnImage(image, transformPath(path, combinedTransform), true, linePen, fillBrush, pageScale);
}
void LineAnnotPainter::drawLeaderLine(double xEndPos, QImage &image, const QTransform &toNormalizedPage) const
{
const QTransform combinedTransform = toNormalizedPage * toNormalizedImage;
const double ll = aspectRatio * la->lineLeadingForwardPoint() / pageSize.height();
const double lle = aspectRatio * la->lineLeadingBackwardPoint() / pageSize.height();
const int sign {ll > 0 ? -1 : 1};
QList<Okular::NormalizedPoint> path;
if (fabs(ll) > 0) {
path.append({xEndPos, ll});
// do we have the extension on the "back"?
if (fabs(lle) > 0) {
path.append({xEndPos, sign * lle});
} else {
path.append({xEndPos, 0});
}
}
PagePainter::drawShapeOnImage(image, transformPath(path, combinedTransform), false, linePen, fillBrush, pageScale);
}
double LineAnnotPainter::shortenForArrow(double size, Okular::LineAnnotation::TermStyle endStyle)
{
double shortenBy {0};
if (endStyle == Okular::LineAnnotation::Square || endStyle == Okular::LineAnnotation::Circle || endStyle == Okular::LineAnnotation::Diamond || endStyle == Okular::LineAnnotation::ClosedArrow) {
shortenBy = size;
}
return shortenBy;
}
/* kate: replace-tabs on; indent-width 4; */