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