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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef UTILS_P_H
#define UTILS_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <private/qquicktranslate_p.h>
#include <private/qquickitem_p.h>
#include <private/qsvgnode_p.h>
#include <private/qquadpath_p.h>
#include <private/qsvgvisitor_p.h>
QT_BEGIN_NAMESPACE
namespace QQuickVectorImageGenerator::Utils
{
class ViewBoxItem : public QQuickItem
{
public:
ViewBoxItem(const QRectF viewBox, QQuickItem *parent = nullptr) : QQuickItem(parent), m_viewBox(viewBox) { setXForm(); }
protected:
void geometryChange(const QRectF &/*newGeometry*/, const QRectF &/*oldGeometry*/) override
{
setXForm();
}
private:
void setXForm()
{
auto xformProp = transform();
xformProp.clear(&xformProp);
bool translate = !qFuzzyIsNull(m_viewBox.x()) || !qFuzzyIsNull(m_viewBox.y());
if (translate) {
auto *tr = new QQuickTranslate(this);
tr->setX(-m_viewBox.x());
tr->setY(-m_viewBox.y());
xformProp.append(&xformProp, tr);
}
if (!m_viewBox.isEmpty() && width() && height()) {
auto *scale = new QQuickScale(this);
qreal sx = width() / m_viewBox.width();
qreal sy = height() / m_viewBox.height();
scale->setXScale(sx);
scale->setYScale(sy);
xformProp.append(&xformProp, scale);
}
}
QRectF m_viewBox;
};
inline QPainterPath polygonToPath(const QPolygonF &poly, bool closed)
{
QPainterPath path;
if (poly.isEmpty())
return path;
bool first = true;
for (const auto &p : poly) {
if (first)
path.moveTo(p);
else
path.lineTo(p);
first = false;
}
if (closed)
path.closeSubpath();
return path;
}
inline QString pathHintString(const QQuadPath &qp)
{
QString res;
QTextStream str(&res);
auto flags = qp.pathHints();
if (!flags)
return res;
str << "pathHints:";
bool first = true;
#define CHECK_PATH_HINT(flagName) \
if (flags.testFlag(QQuadPath::flagName)) { \
if (!first) \
str << " |"; \
first = false; \
str << " ShapePath." #flagName; \
}
CHECK_PATH_HINT(PathLinear)
CHECK_PATH_HINT(PathQuadratic)
CHECK_PATH_HINT(PathConvex)
CHECK_PATH_HINT(PathFillOnRight)
CHECK_PATH_HINT(PathSolid)
CHECK_PATH_HINT(PathNonIntersecting)
CHECK_PATH_HINT(PathNonOverlappingControlPointTriangles)
return res;
}
// Find the square that gives the same gradient in QGradient::LogicalMode as
// objModeRect does in QGradient::ObjectMode
// When the object's bounding box is not square, the stripes that are conceptually
// perpendicular to the gradient vector within object bounding box space shall render
// non-perpendicular relative to the gradient vector in user space due to application
// of the non-uniform scaling transformation from bounding box space to user space.
inline QRectF mapToQtLogicalMode(const QRectF &objModeRect, const QRectF &boundingRect)
{
QRect pixelRect(objModeRect.x() * boundingRect.width() + boundingRect.left(),
objModeRect.y() * boundingRect.height() + boundingRect.top(),
objModeRect.width() * boundingRect.width(),
objModeRect.height() * boundingRect.height());
if (pixelRect.isEmpty()) // pure horizontal/vertical gradient
return pixelRect;
double w = boundingRect.width();
double h = boundingRect.height();
double objModeSlope = objModeRect.height() / objModeRect.width();
double a = objModeSlope * w / h;
// do calculation with origin == pixelRect.topLeft
double x2 = pixelRect.width();
double y2 = pixelRect.height();
double x = (x2 + a * y2) / (1 + a * a);
double y = y2 - (x - x2)/a;
return QRectF(pixelRect.topLeft(), QSizeF(x,y));
}
inline QString toSvgString(const QPainterPath &path)
{
QString svgPathString;
QTextStream strm(&svgPathString);
for (int i = 0; i < path.elementCount(); ++i) {
QPainterPath::Element element = path.elementAt(i);
if (element.isMoveTo()) {
strm << "M " << element.x << " " << element.y << " ";
} else if (element.isLineTo()) {
strm << "L " << element.x << " " << element.y << " ";
} else if (element.isCurveTo()) {
QPointF c1(element.x, element.y);
++i;
element = path.elementAt(i);
QPointF c2(element.x, element.y);
++i;
element = path.elementAt(i);
QPointF ep(element.x, element.y);
strm << "C "
<< c1.x() << " "
<< c1.y() << " "
<< c2.x() << " "
<< c2.y() << " "
<< ep.x() << " "
<< ep.y() << " ";
}
}
return svgPathString;
}
inline QString toSvgString(const QQuadPath &path)
{
QString svgPathString;
QTextStream strm(&svgPathString);
path.iterateElements([&](const QQuadPath::Element &e, int) {
if (e.isSubpathStart())
strm << "M " << e.startPoint().x() << " " << e.startPoint().y() << " ";
if (e.isLine())
strm << "L " << e.endPoint().x() << " " << e.endPoint().y() << " ";
else
strm << "Q " << e.controlPoint().x() << " " << e.controlPoint().y() << " "
<< e.endPoint().x() << " " << e.endPoint().y() << " ";
});
return svgPathString;
}
inline QString strokeCapStyleString(Qt::PenCapStyle strokeCapStyle)
{
QString capStyle;
switch (strokeCapStyle) {
case Qt::FlatCap:
capStyle = QStringLiteral("ShapePath.FlatCap");
break;
case Qt::SquareCap:
capStyle = QStringLiteral("ShapePath.SquareCap");
break;
case Qt::RoundCap:
capStyle = QStringLiteral("ShapePath.RoundCap");
break;
default:
Q_UNREACHABLE();
break;
}
return capStyle;
}
inline QString strokeJoinStyleString(Qt::PenJoinStyle strokeJoinStyle)
{
QString joinStyle;
switch (strokeJoinStyle) {
case Qt::MiterJoin:
joinStyle = QStringLiteral("ShapePath.MiterJoin");
break;
case Qt::BevelJoin:
joinStyle = QStringLiteral("ShapePath.BevelJoin");
break;
case Qt::RoundJoin:
joinStyle = QStringLiteral("ShapePath.RoundJoin");
break;
default:
//TODO: Add support for SvgMiter case
Q_UNREACHABLE();
break;
}
return joinStyle;
}
template<typename T>
inline QString listString(QList<T> list)
{
if (list.isEmpty())
return QStringLiteral("[]");
QString l;
QTextStream stream(&l);
stream << "[";
if (list.length() > 1) {
for (int i = 0; i < list.length() - 1; i++) {
T v = list[i];
stream << v << ", ";
}
}
stream << list.last() << "]";
return l;
}
}
QT_END_NAMESPACE
#endif // UTILS_P_H
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