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3b3f613830
* fixes #6336 * apply the same fix to MolDraw2DJS (it is a no-op at the moment, but still)
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
//
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// Copyright (C) 2015 Greg Landrum
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//
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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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// derived from Dave Cosgrove's MolDraw2D
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//
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// This is a concrete class derived from MolDraw2D that uses RDKit to draw a
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// molecule into a cairo drawing context
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#include <RDGeneral/export.h>
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#ifndef MOLDRAW2DCAIRO_H
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#define MOLDRAW2DCAIRO_H
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#include <cairo.h>
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#include <GraphMol/MolDraw2D/MolDraw2D.h>
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// ****************************************************************************
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namespace RDKit {
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class RDKIT_MOLDRAW2D_EXPORT MolDraw2DCairo : public MolDraw2D {
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public:
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// does not take ownership of the drawing context
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MolDraw2DCairo(int width, int height, cairo_t *cr, int panelWidth = -1,
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int panelHeight = -1, bool noFreetype = false)
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: MolDraw2D(width, height, panelWidth, panelHeight), dp_cr(cr) {
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cairo_reference(dp_cr);
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df_noFreetype = noFreetype;
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initTextDrawer(noFreetype);
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}
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MolDraw2DCairo(int width, int height, int panelWidth = -1,
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int panelHeight = -1, bool noFreetype = false)
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: MolDraw2D(width, height, panelWidth, panelHeight), dp_cr(nullptr) {
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if (width > 0 && height > 0) {
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initDrawing();
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needs_init_ = false;
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}
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initTextDrawer(noFreetype);
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df_noFreetype = noFreetype;
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}
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MolDraw2DCairo(const MolDraw2DCairo &) = delete;
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MolDraw2DCairo(MolDraw2DCairo &&) = delete;
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MolDraw2DCairo &operator=(const MolDraw2DCairo &) = delete;
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MolDraw2DCairo &operator=(MolDraw2DCairo &&) = delete;
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~MolDraw2DCairo() {
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if (dp_cr) {
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if (cairo_get_reference_count(dp_cr) > 0) {
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cairo_destroy(dp_cr);
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}
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dp_cr = nullptr;
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}
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}
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void setColour(const DrawColour &col) override;
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// not sure if this goes here or if we should do a dtor since initDrawing() is
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// called in the ctor,
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// but we'll start here
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void finishDrawing();
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void drawLine(const Point2D &cds1, const Point2D &cds2,
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bool rawCoords = false) override;
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// void drawString( const std::string &str, const Point2D &cds );
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void drawPolygon(const std::vector<Point2D> &cds,
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bool rawCoords = false) override;
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void clearDrawing() override;
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void drawWavyLine(const Point2D &cds1, const Point2D &cds2,
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const DrawColour &col1, const DrawColour &col2,
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unsigned int nSegments = 16, double vertOffset = 0.05,
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bool rawCoords = false) override;
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// returns the PNG data in a string
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std::string getDrawingText() const;
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// writes the PNG data to a file
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void writeDrawingText(const std::string &fName) const;
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#if defined(WIN32) && !defined(RDK_BUILD_FREETYPE_SUPPORT)
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bool supportsAnnotations() const override { return false; }
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#endif
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private:
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cairo_t *dp_cr = nullptr;
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bool df_noFreetype = false;
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void updateMetadata(const ROMol &mol, int confId) override;
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void updateMetadata(const ChemicalReaction &rxn) override;
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void initDrawing() override;
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void initTextDrawer(bool noFreetype) override;
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std::string addMetadataToPNG(const std::string &png) const;
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void updateMetadata(const ROMol &mol) const;
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void updateMetadata(const ChemicalReaction &rxn) const;
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};
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} // namespace RDKit
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#endif // MOLDRAW2DCAIRO_H
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