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//
// Copyright (C) 2020 Greg Landrum and T5 Informatics GmbH
// @@ All Rights Reserved @@
// This file is part of the RDKit.
// The contents are covered by the terms of the BSD license
// which is included in the file license.txt, found at the root
// of the RDKit source tree.
//
//
#include "DrawTextFTQt.h"
#include <QPainter>
#include <QPainterPath>
namespace RDKit {
namespace MolDraw2D_detail {
// ****************************************************************************
DrawTextFTQt::DrawTextFTQt(double max_fnt_sz, double min_fnt_sz,
const std::string &font_file, QPainter *qp)
: DrawTextFT(max_fnt_sz, min_fnt_sz, font_file), d_qp(qp) {}
DrawTextFTQt::~DrawTextFTQt() = default;
// ****************************************************************************
double DrawTextFTQt::extractOutline() {
dp_qpp.reset(new QPainterPath());
double adv = DrawTextFT::extractOutline();
const auto &col = colour();
QColor this_col(int(255.0 * col.r), int(255.0 * col.g), int(255.0 * col.b),
int(255.0 * col.a));
QPen pen(this_col);
pen.setJoinStyle(Qt::RoundJoin);
d_qp->setPen(pen);
QBrush brush(this_col);
brush.setStyle(Qt::SolidPattern);
d_qp->setBrush(brush);
d_qp->fillPath(*dp_qpp, brush);
return adv;
}
// ****************************************************************************
int DrawTextFTQt::MoveToFunctionImpl(const FT_Vector *to) {
PRECONDITION(dp_qpp, "no path");
double dx, dy;
fontPosToDrawPos(to->x, to->y, dx, dy);
dp_qpp->moveTo(dx, dy);
return 0;
}
// ****************************************************************************
int DrawTextFTQt::LineToFunctionImpl(const FT_Vector *to) {
PRECONDITION(dp_qpp, "no path");
double dx, dy;
fontPosToDrawPos(to->x, to->y, dx, dy);
dp_qpp->lineTo(dx, dy);
return 0;
}
// ****************************************************************************
int DrawTextFTQt::ConicToFunctionImpl(const FT_Vector *control,
const FT_Vector *to) {
PRECONDITION(dp_qpp, "no path");
// Qt doesn't have a quadratic bezier function, we need to promote
// it to a cubic using formula from
// https://lists.cairographics.org/archives/cairo/2010-April/019691.html
// and correcting the typo on the last line.
double x0, y0;
auto currp = dp_qpp->currentPosition();
x0 = currp.x();
y0 = currp.y();
double x1, y1;
fontPosToDrawPos(control->x, control->y, x1, y1);
double x2, y2;
fontPosToDrawPos(to->x, to->y, x2, y2);
dp_qpp->cubicTo((2.0 / 3.0) * x1 + (1.0 / 3.0) * x0,
(2.0 / 3.0) * y1 + (1.0 / 3.0) * y0,
(2.0 / 3.0) * x1 + (1.0 / 3.0) * x2,
(2.0 / 3.0) * y1 + (1.0 / 3.0) * y2, x2, y2);
return 0;
}
// ****************************************************************************
int DrawTextFTQt::CubicToFunctionImpl(const FT_Vector *controlOne,
const FT_Vector *controlTwo,
const FT_Vector *to) {
PRECONDITION(dp_qpp, "no path");
double controlOneX, controlOneY;
fontPosToDrawPos(controlOne->x, controlOne->y, controlOneX, controlOneY);
double controlTwoX, controlTwoY;
fontPosToDrawPos(controlTwo->x, controlTwo->y, controlTwoX, controlTwoY);
double dx, dy;
fontPosToDrawPos(to->x, to->y, dx, dy);
dp_qpp->cubicTo(controlOneX, controlOneY, controlTwoX, controlTwoY, dx, dy);
return 0;
}
} // namespace MolDraw2D_detail
} // namespace RDKit
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