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//
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// Copyright (C) 2017 James Turner zakalawe@mac.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#include "fgcanvaspath.h"
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#include <cctype>
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#include <QByteArrayList>
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#include <QPainter>
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#include <QDebug>
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#include <QtMath>
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#include <QPen>
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#include "fgcanvaspaintcontext.h"
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#include "localprop.h"
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#include "canvasitem.h"
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#include "private/qtriangulator_p.h" // private QtGui header
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#include "private/qtriangulatingstroker_p.h" // private QtGui header
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#include "private/qvectorpath_p.h" // private QtGui header
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#include <QSGGeometry>
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#include <QSGGeometryNode>
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#include <QSGFlatColorMaterial>
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class PathQuickItem : public CanvasItem
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{
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Q_OBJECT
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Q_PROPERTY(QColor fillColor READ fillColor WRITE setFillColor NOTIFY fillColorChanged)
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Q_PROPERTY(QPen stroke READ stroke WRITE setStroke NOTIFY strokeChanged)
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public:
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PathQuickItem(QQuickItem* parent)
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: CanvasItem(parent)
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{
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setFlag(ItemHasContents);
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}
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void setPath(QPainterPath pp)
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{
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m_path = pp;
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QRectF pathBounds = pp.boundingRect();
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setImplicitSize(pathBounds.width(), pathBounds.height());
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update(); // request a paint node update
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}
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QSGNode* updateRealPaintNode(QSGNode* oldNode, QQuickItem::UpdatePaintNodeData *) override
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{
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if (m_path.isEmpty()) {
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return nullptr;
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}
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delete oldNode;
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QSGGeometryNode* fillGeom = nullptr;
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QSGGeometryNode* strokeGeom = nullptr;
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if (m_fillColor.isValid()) {
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// TODO: compute LOD for qTriangulate based on world transform
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QTransform transform;
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QTriangleSet triangles = qTriangulate(m_path, transform);
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int indexType = GL_UNSIGNED_SHORT;
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if (triangles.indices.type() == QVertexIndexVector::UnsignedShort) {
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// default is fine
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} else if (triangles.indices.type() == QVertexIndexVector::UnsignedInt) {
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indexType = GL_UNSIGNED_INT;
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} else {
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qFatal("Unsupported triangle index type");
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}
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QSGGeometry* sgGeom = new QSGGeometry(QSGGeometry::defaultAttributes_Point2D(),
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triangles.vertices.size() >> 1,
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triangles.indices.size(),
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indexType);
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sgGeom->setIndexDataPattern(QSGGeometry::StaticPattern);
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sgGeom->setDrawingMode(GL_TRIANGLES);
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//
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QSGGeometry::Point2D *points = sgGeom->vertexDataAsPoint2D();
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for (int v=0; v < triangles.vertices.size(); ) {
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const float vx = triangles.vertices.at(v++);
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const float vy = triangles.vertices.at(v++);
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(points++)->set(vx, vy);
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}
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if (triangles.indices.type() == QVertexIndexVector::UnsignedShort) {
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quint16* indices = sgGeom->indexDataAsUShort();
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::memcpy(indices, triangles.indices.data(), sizeof(unsigned short) * triangles.indices.size());
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} else {
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quint32* indices = sgGeom->indexDataAsUInt();
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::memcpy(indices, triangles.indices.data(), sizeof(quint32) * triangles.indices.size());
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}
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// create the node now, pretty trivial
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fillGeom = new QSGGeometryNode;
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fillGeom->setGeometry(sgGeom);
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fillGeom->setFlag(QSGNode::OwnsGeometry);
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QSGFlatColorMaterial* mat = new QSGFlatColorMaterial();
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mat->setColor(m_fillColor);
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fillGeom->setMaterial(mat);
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fillGeom->setFlag(QSGNode::OwnsMaterial);
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}
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if (m_stroke.style() != Qt::NoPen) {
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const QVectorPath& vp = qtVectorPathForPath(m_path);
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QRectF clipBounds;
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QTriangulatingStroker ts;
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QPainter::RenderHints renderHints;
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if (m_stroke.style() == Qt::SolidLine) {
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ts.process(vp, m_stroke, clipBounds, renderHints);
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#if 0
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inline int vertexCount() const { return m_vertices.size(); }
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inline const float *vertices() const { return m_vertices.data(); }
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#endif
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} else {
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QDashedStrokeProcessor dasher;
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dasher.process(vp, m_stroke, clipBounds, renderHints);
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QVectorPath dashStroke(dasher.points(),
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dasher.elementCount(),
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dasher.elementTypes(),
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renderHints);
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ts.process(dashStroke, m_stroke, clipBounds, renderHints);
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}
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QSGGeometry* sgGeom = new QSGGeometry(QSGGeometry::defaultAttributes_Point2D(),
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ts.vertexCount() >> 1);
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sgGeom->setVertexDataPattern(QSGGeometry::StaticPattern);
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sgGeom->setDrawingMode(GL_TRIANGLE_STRIP);
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QSGGeometry::Point2D *points = sgGeom->vertexDataAsPoint2D();
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const float* vPtr = ts.vertices();
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for (int v=0; v < ts.vertexCount(); v += 2) {
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const float vx = *vPtr++;
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const float vy = *vPtr++;
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(points++)->set(vx, vy);
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}
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// create the node now, pretty trivial
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strokeGeom = new QSGGeometryNode;
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strokeGeom->setGeometry(sgGeom);
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strokeGeom->setFlag(QSGNode::OwnsGeometry);
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QSGFlatColorMaterial* mat = new QSGFlatColorMaterial();
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mat->setColor(m_stroke.color());
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strokeGeom->setMaterial(mat);
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strokeGeom->setFlag(QSGNode::OwnsMaterial);
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}
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if (fillGeom && strokeGeom) {
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QSGNode* groupNode = new QSGNode;
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groupNode->appendChildNode(fillGeom);
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groupNode->appendChildNode(strokeGeom);
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return groupNode;
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} else if (fillGeom) {
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return fillGeom;
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}
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return strokeGeom;
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}
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QColor fillColor() const
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{
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return m_fillColor;
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}
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QPen stroke() const
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{
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return m_stroke;
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}
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public slots:
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void setFillColor(QColor fillColor)
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{
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if (m_fillColor == fillColor)
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return;
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m_fillColor = fillColor;
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emit fillColorChanged(fillColor);
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update();
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}
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void setStroke(QPen stroke)
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{
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if (m_stroke == stroke)
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return;
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m_stroke = stroke;
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emit strokeChanged(stroke);
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update();
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}
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signals:
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void fillColorChanged(QColor fillColor);
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void strokeChanged(QPen stroke);
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protected:
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void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) override
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{
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QQuickItem::geometryChanged(newGeometry, oldGeometry);
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update();
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}
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QRectF boundingRect() const override
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{
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if ((width() == 0.0) || (height() == 0.0)) {
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return QRectF(0.0, 0.0, implicitWidth(), implicitHeight());
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}
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return QQuickItem::boundingRect();
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}
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private:
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QPainterPath m_path;
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QColor m_fillColor;
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QPen m_stroke;
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};
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static void pathArcSegment(QPainterPath &path,
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qreal xc, qreal yc,
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qreal th0, qreal th1,
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qreal rx, qreal ry, qreal xAxisRotation)
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{
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qreal sinTh, cosTh;
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qreal a00, a01, a10, a11;
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qreal x1, y1, x2, y2, x3, y3;
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qreal t;
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qreal thHalf;
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sinTh = qSin(xAxisRotation * (M_PI / 180.0));
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cosTh = qCos(xAxisRotation * (M_PI / 180.0));
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a00 = cosTh * rx;
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a01 = -sinTh * ry;
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a10 = sinTh * rx;
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a11 = cosTh * ry;
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thHalf = 0.5 * (th1 - th0);
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t = (8.0 / 3.0) * qSin(thHalf * 0.5) * qSin(thHalf * 0.5) / qSin(thHalf);
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x1 = xc + qCos(th0) - t * qSin(th0);
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y1 = yc + qSin(th0) + t * qCos(th0);
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x3 = xc + qCos(th1);
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y3 = yc + qSin(th1);
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x2 = x3 + t * qSin(th1);
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y2 = y3 - t * qCos(th1);
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path.cubicTo(a00 * x1 + a01 * y1, a10 * x1 + a11 * y1,
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a00 * x2 + a01 * y2, a10 * x2 + a11 * y2,
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a00 * x3 + a01 * y3, a10 * x3 + a11 * y3);
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}
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// the arc handling code underneath is from XSVG (BSD license)
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/*
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* Copyright 2002 USC/Information Sciences Institute
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Information Sciences Institute not be used in advertising or
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* publicity pertaining to distribution of the software without
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* specific, written prior permission. Information Sciences Institute
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* makes no representations about the suitability of this software for
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* any purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* INFORMATION SCIENCES INSTITUTE DISCLAIMS ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL INFORMATION SCIENCES
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* INSTITUTE BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
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* OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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static void pathArc(QPainterPath &path,
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qreal rx,
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qreal ry,
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qreal x_axis_rotation,
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int large_arc_flag,
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int sweep_flag,
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qreal x,
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qreal y,
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qreal curx, qreal cury)
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{
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qreal sin_th, cos_th;
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qreal a00, a01, a10, a11;
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qreal x0, y0, x1, y1, xc, yc;
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qreal d, sfactor, sfactor_sq;
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qreal th0, th1, th_arc;
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int i, n_segs;
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qreal dx, dy, dx1, dy1, Pr1, Pr2, Px, Py, check;
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rx = qAbs(rx);
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ry = qAbs(ry);
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sin_th = qSin(x_axis_rotation * (M_PI / 180.0));
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cos_th = qCos(x_axis_rotation * (M_PI / 180.0));
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dx = (curx - x) / 2.0;
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dy = (cury - y) / 2.0;
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dx1 = cos_th * dx + sin_th * dy;
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dy1 = -sin_th * dx + cos_th * dy;
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Pr1 = rx * rx;
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Pr2 = ry * ry;
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Px = dx1 * dx1;
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Py = dy1 * dy1;
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/* Spec : check if radii are large enough */
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check = Px / Pr1 + Py / Pr2;
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if (check > 1) {
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rx = rx * qSqrt(check);
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ry = ry * qSqrt(check);
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}
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a00 = cos_th / rx;
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a01 = sin_th / rx;
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a10 = -sin_th / ry;
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a11 = cos_th / ry;
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x0 = a00 * curx + a01 * cury;
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y0 = a10 * curx + a11 * cury;
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x1 = a00 * x + a01 * y;
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y1 = a10 * x + a11 * y;
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/* (x0, y0) is current point in transformed coordinate space.
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(x1, y1) is new point in transformed coordinate space.
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The arc fits a unit-radius circle in this space.
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*/
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d = (x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0);
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sfactor_sq = 1.0 / d - 0.25;
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if (sfactor_sq < 0) sfactor_sq = 0;
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sfactor = qSqrt(sfactor_sq);
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if (sweep_flag == large_arc_flag) sfactor = -sfactor;
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xc = 0.5 * (x0 + x1) - sfactor * (y1 - y0);
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yc = 0.5 * (y0 + y1) + sfactor * (x1 - x0);
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/* (xc, yc) is center of the circle. */
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th0 = qAtan2(y0 - yc, x0 - xc);
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th1 = qAtan2(y1 - yc, x1 - xc);
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th_arc = th1 - th0;
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if (th_arc < 0 && sweep_flag)
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th_arc += 2 * M_PI;
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else if (th_arc > 0 && !sweep_flag)
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th_arc -= 2 * M_PI;
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n_segs = qCeil(qAbs(th_arc / (M_PI * 0.5 + 0.001)));
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for (i = 0; i < n_segs; i++) {
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pathArcSegment(path, xc, yc,
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th0 + i * th_arc / n_segs,
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th0 + (i + 1) * th_arc / n_segs,
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rx, ry, x_axis_rotation);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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FGCanvasPath::FGCanvasPath(FGCanvasGroup* pr, LocalProp* prop) :
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FGCanvasElement(pr, prop)
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{
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}
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void FGCanvasPath::dumpElement()
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{
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qDebug() << "Path: at " << _propertyRoot->path();
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}
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void FGCanvasPath::doPaint(FGCanvasPaintContext *context) const
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{
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context->painter()->setPen(_stroke);
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switch (_paintType) {
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case Rect:
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context->painter()->drawRect(_rect);
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break;
|
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case RoundRect:
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context->painter()->drawRoundRect(_rect, _roundRectRadius.width(), _roundRectRadius.height());
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break;
|
||||
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case Path:
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context->painter()->drawPath(_painterPath);
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break;
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}
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||||
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if (isHighlighted()) {
|
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context->painter()->setPen(QPen(Qt::red, 1));
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context->painter()->setBrush(Qt::NoBrush);
|
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switch (_paintType) {
|
||||
case Rect:
|
||||
case RoundRect:
|
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context->painter()->drawRect(_rect);
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break;
|
||||
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case Path:
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context->painter()->drawRect(_painterPath.boundingRect());
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break;
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||||
}
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||||
}
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||||
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||||
}
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||||
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void FGCanvasPath::doPolish()
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{
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if (_pathDirty) {
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rebuildPath();
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if (_quickPath) {
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_quickPath->setPath(_painterPath);
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}
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_pathDirty = false;
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}
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if (_penDirty) {
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rebuildPen();
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if (_quickPath) {
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_quickPath->setStroke(_stroke);
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}
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_penDirty = false;
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}
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||||
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if (_quickPath) {
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_quickPath->setFillColor(fillColor());
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}
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}
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||||
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||||
void FGCanvasPath::markStyleDirty()
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||||
{
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||||
_penDirty = true;
|
||||
}
|
||||
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||||
CanvasItem *FGCanvasPath::createQuickItem(QQuickItem *parent)
|
||||
{
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_quickPath = new PathQuickItem(parent);
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||||
_quickPath->setPath(_painterPath);
|
||||
_quickPath->setStroke(_stroke);
|
||||
_quickPath->setAntialiasing(true);
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||||
return _quickPath;
|
||||
}
|
||||
|
||||
CanvasItem *FGCanvasPath::quickItem() const
|
||||
{
|
||||
return _quickPath;
|
||||
}
|
||||
|
||||
void FGCanvasPath::doDestroy()
|
||||
{
|
||||
delete _quickPath;
|
||||
}
|
||||
|
||||
void FGCanvasPath::markPathDirty()
|
||||
{
|
||||
_pathDirty = true;
|
||||
requestPolish();
|
||||
}
|
||||
|
||||
void FGCanvasPath::markStrokeDirty()
|
||||
{
|
||||
_penDirty = true;
|
||||
requestPolish();
|
||||
}
|
||||
|
||||
bool FGCanvasPath::onChildAdded(LocalProp *prop)
|
||||
{
|
||||
if (FGCanvasElement::onChildAdded(prop)) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if ((prop->name() == "cmd") || (prop->name() == "coord") || (prop->name() == "svg")) {
|
||||
connect(prop, &LocalProp::valueChanged, this, &FGCanvasPath::markPathDirty);
|
||||
return true;
|
||||
}
|
||||
|
||||
if (prop->name() == "rect") {
|
||||
_isRect = true;
|
||||
connect(prop, &LocalProp::childAdded, this, &FGCanvasPath::onChildAdded);
|
||||
return true;
|
||||
}
|
||||
|
||||
// handle rect property changes
|
||||
if (prop->parent()->name() == "rect") {
|
||||
connect(prop, &LocalProp::valueChanged, this, &FGCanvasPath::markPathDirty);
|
||||
return true;
|
||||
}
|
||||
|
||||
if (prop->name().startsWith("border-")) {
|
||||
connect(prop, &LocalProp::valueChanged, this, &FGCanvasPath::markPathDirty);
|
||||
return true;
|
||||
}
|
||||
|
||||
if ((prop->name() == "cmd-geo") || (prop->name() == "coord-geo")) {
|
||||
// ignore for now, we let the server-side transform down to cartesian.
|
||||
// if we move that work to client side we could skip sending the cmd/coord data
|
||||
return true;
|
||||
}
|
||||
|
||||
if (prop->name().startsWith("stroke")) {
|
||||
connect(prop, &LocalProp::valueChanged, this, &FGCanvasPath::markStrokeDirty);
|
||||
return true;
|
||||
}
|
||||
|
||||
qWarning() << "path saw unrecognized child:" << prop->name() << prop->index();
|
||||
return false;
|
||||
}
|
||||
|
||||
bool FGCanvasPath::onChildRemoved(LocalProp* prop)
|
||||
{
|
||||
if (FGCanvasElement::onChildRemoved(prop)) {
|
||||
return true;
|
||||
}
|
||||
|
||||
const auto name = prop->name();
|
||||
if (name == "rect") {
|
||||
_isRect = false;
|
||||
markPathDirty();
|
||||
return true;
|
||||
}
|
||||
|
||||
if ((name == "cmd") || (name == "coord") || (name == "svg")) {
|
||||
markPathDirty();
|
||||
return true;
|
||||
}
|
||||
|
||||
if ((name == "cmd-geo") || (name == "coord-geo")) {
|
||||
// ignored
|
||||
return true;
|
||||
}
|
||||
|
||||
if (name.startsWith("stroke")) {
|
||||
markStrokeDirty();
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
typedef enum
|
||||
{
|
||||
PathClose = ( 0 << 1),
|
||||
PathMoveTo = ( 1 << 1),
|
||||
PathLineTo = ( 2 << 1),
|
||||
PathHLineTo = ( 3 << 1),
|
||||
PathVLineTo = ( 4 << 1),
|
||||
PathQuadTo = ( 5 << 1),
|
||||
PathCubicTo = ( 6 << 1),
|
||||
PathSmoothQuadTo = ( 7 << 1),
|
||||
PathSmoothCubicTo = ( 8 << 1),
|
||||
PathShortCCWArc = ( 9 << 1),
|
||||
PathShortCWArc = (10 << 1),
|
||||
PathLongCCWArc = (11 << 1),
|
||||
PathLongCWArc = (12 << 1)
|
||||
} PathCommands;
|
||||
|
||||
static const quint8 CoordsPerCommand[] = {
|
||||
0, /* VG_CLOSE_PATH */
|
||||
2, /* VG_MOVE_TO */
|
||||
2, /* VG_LINE_TO */
|
||||
1, /* VG_HLINE_TO */
|
||||
1, /* VG_VLINE_TO */
|
||||
4, /* VG_QUAD_TO */
|
||||
6, /* VG_CUBIC_TO */
|
||||
2, /* VG_SQUAD_TO */
|
||||
4, /* VG_SCUBIC_TO */
|
||||
5, /* VG_SCCWARC_TO */
|
||||
5, /* VG_SCWARC_TO */
|
||||
5, /* VG_LCCWARC_TO */
|
||||
5 /* VG_LCWARC_TO */
|
||||
};
|
||||
|
||||
void FGCanvasPath::rebuildPath() const
|
||||
{
|
||||
std::vector<float> coords;
|
||||
std::vector<int> commands;
|
||||
|
||||
if (_isRect) {
|
||||
rebuildFromRect(commands, coords);
|
||||
} else if (_propertyRoot->hasChild("svg")) {
|
||||
if (!rebuildFromSVGData(commands, coords)) {
|
||||
qWarning() << "failed to parse SVG path data" << _propertyRoot->value("svg", QVariant());
|
||||
}
|
||||
} else {
|
||||
for (QVariant v : _propertyRoot->valuesOfChildren("coord")) {
|
||||
coords.push_back(v.toFloat());
|
||||
}
|
||||
|
||||
for (QVariant v : _propertyRoot->valuesOfChildren("cmd")) {
|
||||
commands.push_back(v.toInt());
|
||||
}
|
||||
}
|
||||
|
||||
rebuildPathFromCommands(commands, coords);
|
||||
}
|
||||
|
||||
QByteArrayList splitSVGPathData(QByteArray d)
|
||||
{
|
||||
QByteArrayList result;
|
||||
size_t pos = 0;
|
||||
std::string strData(d.data());
|
||||
const char* seperators = "\n\r\t ,";
|
||||
size_t startPos = strData.find_first_not_of(seperators, 0);
|
||||
for(;;)
|
||||
{
|
||||
pos = strData.find_first_of(seperators, startPos);
|
||||
if (pos == std::string::npos) {
|
||||
result.push_back(QByteArray::fromStdString(strData.substr(startPos)));
|
||||
break;
|
||||
}
|
||||
result.push_back(QByteArray::fromStdString(strData.substr(startPos, pos - startPos)));
|
||||
startPos = strData.find_first_not_of(seperators, pos);
|
||||
if (startPos == std::string::npos) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
bool hasComplexBorderRadius(const LocalProp* prop)
|
||||
{
|
||||
for (auto childProp : prop->children()) {
|
||||
QByteArray name = childProp->name();
|
||||
if (!name.startsWith("border-") || !name.endsWith("-radius")) {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (name != "border-radius") {
|
||||
return true;
|
||||
}
|
||||
} // of child prop iteration
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
bool FGCanvasPath::rebuildFromRect(std::vector<int>& commands, std::vector<float>& coords) const
|
||||
{
|
||||
LocalProp* rectProp = _propertyRoot->getWithPath("rect");
|
||||
if (hasComplexBorderRadius(_propertyRoot)) {
|
||||
// build a full path
|
||||
qWarning() << Q_FUNC_INFO << "implement me";
|
||||
_paintType = Path;
|
||||
} else {
|
||||
float top = rectProp->value("top", 0.0).toFloat();
|
||||
float left = rectProp->value("left", 0.0).toFloat();
|
||||
float width = rectProp->value("width", 0.0).toFloat();
|
||||
float height = rectProp->value("height", 0.0).toFloat();
|
||||
|
||||
if (rectProp->hasChild("right")) {
|
||||
width = rectProp->value("right", 0.0).toFloat() - left;
|
||||
}
|
||||
|
||||
if (rectProp->hasChild("bottom")) {
|
||||
height = rectProp->value("bottom", 0.0).toFloat() - top;
|
||||
}
|
||||
|
||||
_rect = QRectF(left, top, width, height);
|
||||
|
||||
if (_propertyRoot->hasChild("border-radius")) {
|
||||
// round-rect
|
||||
float xR = _propertyRoot->value("border-radius", 0.0).toFloat();
|
||||
float yR = xR;
|
||||
if (_propertyRoot->hasChild("border-radius[1]")) {
|
||||
yR = _propertyRoot->value("border-radius[1]", 0.0).toFloat();
|
||||
}
|
||||
|
||||
_roundRectRadius = QSizeF(xR, yR);
|
||||
_paintType = RoundRect;
|
||||
} else {
|
||||
// simple rect
|
||||
_paintType = Rect;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool FGCanvasPath::rebuildFromSVGData(std::vector<int>& commands, std::vector<float>& coords) const
|
||||
{
|
||||
QByteArrayList tokens = splitSVGPathData(_propertyRoot->value("svg", QVariant()).toByteArray());
|
||||
PathCommands currentCommand = PathClose;
|
||||
bool isRelative = false;
|
||||
int numCoordsTokens = 0;
|
||||
const int totalTokens = tokens.size();
|
||||
|
||||
for (int index = 0; index < totalTokens; /* no increment */) {
|
||||
const QByteArray& tk = tokens.at(index);
|
||||
if ((tk.length() == 1) && std::isalpha(tk.at(0))) {
|
||||
// new command token
|
||||
const char svgCommand = std::toupper(tk.at(0));
|
||||
isRelative = std::islower(tk.at(0));
|
||||
|
||||
switch (svgCommand) {
|
||||
case 'Z':
|
||||
currentCommand = PathClose;
|
||||
numCoordsTokens = 0;
|
||||
break;
|
||||
case 'M':
|
||||
currentCommand = PathMoveTo;
|
||||
numCoordsTokens = 2;
|
||||
break;
|
||||
case 'L':
|
||||
currentCommand = PathLineTo;
|
||||
numCoordsTokens = 2;
|
||||
break;
|
||||
case 'H':
|
||||
currentCommand = PathHLineTo;
|
||||
numCoordsTokens = 1;
|
||||
break;
|
||||
case 'V':
|
||||
currentCommand = PathVLineTo;
|
||||
numCoordsTokens = 1;
|
||||
break;
|
||||
case 'C':
|
||||
currentCommand = PathCubicTo;
|
||||
numCoordsTokens = 6;
|
||||
break;
|
||||
case 'S':
|
||||
currentCommand = PathSmoothCubicTo;
|
||||
numCoordsTokens = 4;
|
||||
break;
|
||||
case 'Q':
|
||||
currentCommand = PathQuadTo;
|
||||
numCoordsTokens = 4;
|
||||
break;
|
||||
case 'T':
|
||||
currentCommand = PathSmoothQuadTo;
|
||||
numCoordsTokens = 2;
|
||||
break;
|
||||
case 'A':
|
||||
currentCommand = PathShortCWArc;
|
||||
numCoordsTokens = 0; // handled specially below
|
||||
break;
|
||||
default:
|
||||
qWarning() << "unrecognized SVG command" << svgCommand;
|
||||
return false;
|
||||
}
|
||||
++index;
|
||||
}
|
||||
|
||||
switch (currentCommand) {
|
||||
case PathMoveTo:
|
||||
commands.push_back(PathMoveTo | (isRelative ? 1 : 0));
|
||||
currentCommand = PathLineTo;
|
||||
break;
|
||||
|
||||
case PathClose:
|
||||
case PathLineTo:
|
||||
case PathHLineTo:
|
||||
case PathVLineTo:
|
||||
case PathQuadTo:
|
||||
case PathCubicTo:
|
||||
case PathSmoothQuadTo:
|
||||
case PathSmoothCubicTo:
|
||||
commands.push_back(currentCommand | (isRelative ? 1 : 0));
|
||||
break;
|
||||
|
||||
case PathShortCWArc:
|
||||
case PathShortCCWArc:
|
||||
case PathLongCWArc:
|
||||
case PathLongCCWArc:
|
||||
{
|
||||
// decode the actual arc type
|
||||
coords.push_back(tokens.at(index++).toFloat()); // rx
|
||||
coords.push_back(tokens.at(index++).toFloat()); // ry
|
||||
coords.push_back(tokens.at(index++).toFloat()); // x-axis rotation
|
||||
|
||||
const bool isLargeArc = (tokens.at(index++).toInt() != 0); // large-angle
|
||||
const bool isCCW = (tokens.at(index++).toInt() != 0); // sweep-flag
|
||||
if (isLargeArc) {
|
||||
commands.push_back(isCCW ? PathLongCCWArc : PathLongCWArc);
|
||||
} else {
|
||||
commands.push_back(isCCW ? PathShortCCWArc : PathShortCWArc);
|
||||
}
|
||||
|
||||
if (isRelative) {
|
||||
commands.back() |= 1;
|
||||
}
|
||||
|
||||
coords.push_back(tokens.at(index++).toFloat());
|
||||
coords.push_back(tokens.at(index++).toFloat());
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
qWarning() << "invalid path command";
|
||||
return false;
|
||||
} // of current command switch
|
||||
|
||||
// copy over tokens according to the active command.
|
||||
if (index + numCoordsTokens > totalTokens) {
|
||||
qWarning() << "insufficent remaining tokens for SVG command" << currentCommand;
|
||||
qWarning() << index << numCoordsTokens << totalTokens;
|
||||
return false;
|
||||
}
|
||||
|
||||
for (int c = 0; c < numCoordsTokens; ++c) {
|
||||
coords.push_back(tokens.at(index + c).toFloat());
|
||||
}
|
||||
|
||||
index += numCoordsTokens;
|
||||
} // of tokens iteration
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void FGCanvasPath::rebuildPathFromCommands(const std::vector<int>& commands, const std::vector<float>& coords) const
|
||||
{
|
||||
QPainterPath newPath;
|
||||
const float* coord = coords.data();
|
||||
QPointF lastControlPoint; // for smooth cubics / quadric
|
||||
size_t currentCoord = 0;
|
||||
|
||||
for (int cmd : commands) {
|
||||
bool isRelative = cmd & 0x1;
|
||||
const int op = cmd & ~0x1;
|
||||
const int cmdIndex = op >> 1;
|
||||
const qreal baseX = isRelative ? newPath.currentPosition().x() : 0.0f;
|
||||
const qreal baseY = isRelative ? newPath.currentPosition().y() : 0.0f;
|
||||
|
||||
if ((currentCoord + CoordsPerCommand[cmdIndex]) > coords.size()) {
|
||||
qWarning() << "insufficient path data" << currentCoord << cmdIndex << CoordsPerCommand[cmdIndex] << coords.size();
|
||||
break;
|
||||
}
|
||||
|
||||
switch (op) {
|
||||
case PathClose:
|
||||
newPath.closeSubpath();
|
||||
break;
|
||||
case PathMoveTo:
|
||||
newPath.moveTo(coord[0] + baseX, coord[1] + baseY);
|
||||
break;
|
||||
case PathLineTo:
|
||||
newPath.lineTo(coord[0] + baseX, coord[1] + baseY);
|
||||
break;
|
||||
case PathHLineTo:
|
||||
newPath.lineTo(coord[0] + baseX, newPath.currentPosition().y());
|
||||
break;
|
||||
case PathVLineTo:
|
||||
newPath.lineTo(newPath.currentPosition().x(), coord[0] + baseY);
|
||||
break;
|
||||
case PathQuadTo:
|
||||
newPath.quadTo(coord[0] + baseX, coord[1] + baseY,
|
||||
coord[2] + baseX, coord[3] + baseY);
|
||||
lastControlPoint = QPointF(coord[0] + baseX, coord[1] + baseY);
|
||||
break;
|
||||
case PathCubicTo:
|
||||
newPath.cubicTo(coord[0] + baseX, coord[1] + baseY,
|
||||
coord[2] + baseX, coord[3] + baseY,
|
||||
coord[4] + baseX, coord[5] + baseY);
|
||||
lastControlPoint = QPointF(coord[2] + baseX, coord[3] + baseY);
|
||||
break;
|
||||
|
||||
case PathSmoothQuadTo: {
|
||||
QPointF smoothControlPoint = (newPath.currentPosition() - lastControlPoint) * 2.0;
|
||||
newPath.quadTo(smoothControlPoint.x(), smoothControlPoint.y(),
|
||||
coord[0] + baseX, coord[1] + baseY);
|
||||
lastControlPoint = smoothControlPoint;
|
||||
break;
|
||||
}
|
||||
|
||||
case PathSmoothCubicTo: {
|
||||
QPointF smoothControlPoint = (newPath.currentPosition() - lastControlPoint) * 2.0;
|
||||
newPath.cubicTo(smoothControlPoint.x(), smoothControlPoint.y(),
|
||||
coord[0] + baseX, coord[1] + baseY,
|
||||
coord[2] + baseX, coord[3] + baseY);
|
||||
lastControlPoint = QPointF(coord[0] + baseX, coord[1] + baseY);
|
||||
break;
|
||||
}
|
||||
|
||||
#if 0
|
||||
qreal rx,
|
||||
qreal ry,
|
||||
qreal x_axis_rotation,
|
||||
int large_arc_flag,
|
||||
int sweep_flag,
|
||||
qreal x,
|
||||
qreal y,
|
||||
qreal curx, qreal cury)
|
||||
#endif
|
||||
case PathLongCCWArc:
|
||||
case PathLongCWArc:
|
||||
pathArc(newPath, coord[0], coord[1], coord[2],
|
||||
true, (op == PathLongCCWArc),
|
||||
coord[3] + baseX, coord[4] + baseY,
|
||||
newPath.currentPosition().x(), newPath.currentPosition().y());
|
||||
break;
|
||||
|
||||
case PathShortCCWArc:
|
||||
case PathShortCWArc:
|
||||
pathArc(newPath, coord[0], coord[1], coord[2],
|
||||
false, (op == PathShortCCWArc),
|
||||
coord[3] + baseX, coord[4] + baseY,
|
||||
newPath.currentPosition().x(), newPath.currentPosition().y());
|
||||
break;
|
||||
|
||||
default:
|
||||
qWarning() << "uhandled path command type:" << cmdIndex;
|
||||
}
|
||||
|
||||
if ((op < PathQuadTo) || (op > PathSmoothCubicTo)) {
|
||||
lastControlPoint = newPath.currentPosition();
|
||||
}
|
||||
|
||||
coord += CoordsPerCommand[cmdIndex];
|
||||
currentCoord += CoordsPerCommand[cmdIndex];
|
||||
} // of commands iteration
|
||||
|
||||
// qDebug() << _propertyRoot->path() << "path" << newPath;
|
||||
_painterPath = newPath;
|
||||
}
|
||||
|
||||
static Qt::PenCapStyle qtCapFromCanvas(QString s)
|
||||
{
|
||||
if (s.isEmpty() || (s == "butt")) {
|
||||
return Qt::FlatCap;
|
||||
} else if (s == "round") {
|
||||
return Qt::RoundCap;
|
||||
} else if (s == "square") {
|
||||
return Qt::SquareCap;
|
||||
} else {
|
||||
qDebug() << Q_FUNC_INFO << s;
|
||||
}
|
||||
return Qt::FlatCap;
|
||||
}
|
||||
|
||||
static Qt::PenJoinStyle qtJoinFromCanvas(QString s)
|
||||
{
|
||||
if (s.isEmpty() || (s == "miter")) {
|
||||
return Qt::MiterJoin;
|
||||
} else if (s == "round") {
|
||||
return Qt::RoundJoin;
|
||||
} else {
|
||||
qDebug() << Q_FUNC_INFO << s;
|
||||
}
|
||||
return Qt::MiterJoin;
|
||||
}
|
||||
|
||||
static QVector<qreal> qtPenDashesFromCanvas(QString s, double penWidth)
|
||||
{
|
||||
QVector<qreal> result;
|
||||
Q_FOREACH(QString v, s.split(',')) {
|
||||
result.push_back(v.toFloat() / penWidth);
|
||||
}
|
||||
|
||||
// https://developer.mozilla.org/en/docs/Web/SVG/Attribute/stroke-dasharray
|
||||
// odd number = double it
|
||||
if ((result.size() % 2) == 1) {
|
||||
result += result;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
void FGCanvasPath::rebuildPen() const
|
||||
{
|
||||
QPen p;
|
||||
|
||||
QVariant strokeColor = getCascadedStyle("stroke");
|
||||
p.setColor(parseColorValue(strokeColor));
|
||||
|
||||
p.setWidthF(getCascadedStyle("stroke-width", 1.0).toFloat());
|
||||
p.setCapStyle(qtCapFromCanvas(_propertyRoot->value("stroke-linecap", QString()).toString()));
|
||||
p.setJoinStyle(qtJoinFromCanvas(_propertyRoot->value("stroke-linejoin", QString()).toString()));
|
||||
|
||||
QString dashArray = _propertyRoot->value("stroke-dasharray", QVariant()).toString();
|
||||
if (!dashArray.isEmpty() && (dashArray != "none")) {
|
||||
p.setDashPattern(qtPenDashesFromCanvas(dashArray, p.widthF()));
|
||||
}
|
||||
|
||||
_stroke = p;
|
||||
}
|
||||
|
||||
#include "fgcanvaspath.moc"
|
||||
Reference in New Issue
Block a user