minsky/engine/cairoShimCairo.h at e77029bca0cf0a9ab2849eb6387cb2ef7ba4e859 · highperformancecoder/minsky · GitHub

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#ifndef CAIROSHIMCAIRO_H
#define CAIROSHIMCAIRO_H
#include "ICairoShim.h"
#include "SVGItem.h"
#include <cairo.h>
#include <pango.h>
#include <memory>

namespace ecolab { class Pango; }

namespace minsky
{
  /// Concrete implementation of ICairoShim using actual Cairo library
  class CairoShimCairo: public ICairoShim
  {
    cairo_t* cairo;
    mutable std::unique_ptr<ecolab::Pango> m_pango;
    CairoShimCairo(const CairoShimCairo&)=delete;
    void operator=(const CairoShimCairo&)=delete;
  public:
    CairoShimCairo(cairo_t* c);
    ~CairoShimCairo() override;

    // Drawing operations
    void moveTo(double x, double y) const override;
    void lineTo(double x, double y) const override;
    void relMoveTo(double x, double y) const override;
    void relLineTo(double x, double y) const override;
    void arc(double x, double y, double radius, double start, double end) const override;
    void curveTo(double x1, double y1, double x2, double y2, double x3, double y3) const override;
    void rectangle(double x, double y, double width, double height) const override;

    // Path operations
    void newPath() const override;
    void newSubPath() const override;
    void closePath() const override;
    void getCurrentPoint(double& x, double& y) const override;

    // Fill and stroke operations
    void fill() const override;
    void fillPreserve() const override;
    void stroke() const override;
    void strokePreserve() const override;
    void clip() const override;
    void resetClip() const override;
    void paint() const override;

    // Line properties
    void setLineWidth(double width) const override;
    double getLineWidth() const override;
    void setDash(const double* dashes, int num_dashes, double offset) const override;
    void setFillRule(cairo_fill_rule_t fill_rule) const override;

    // Color operations
    void setSourceRGB(double r, double g, double b) const override;
    void setSourceRGBA(double r, double g, double b, double a) const override;

    // Text operations
    void showText(const std::string& text) const override;
    void setFontSize(double size) const override;
    void selectFontFace(const std::string& family, cairo_font_slant_t slant, cairo_font_weight_t weight) const override;
    void textExtents(const std::string& text, cairo_text_extents_t& extents) const override;

    // Transformation operations
    void identityMatrix() const override;
    void translate(double x, double y) const override;
    void scale(double sx, double sy) const override;
    void rotate(double angle) const override;
    void userToDevice(double& x, double& y) const override;

    // Context state operations
    void save() const override;
    void restore() const override;

    // Tolerance
    void setTolerance(double tolerance) const override;

    // Pango support
    ecolab::Pango& pango() const override;

    // SVG rendering support
    void renderSVG(const SVGRenderer& svgRenderer, double width, double height) const override;

    // TEMPORARY: Internal accessor for migration - to be removed once all implementations are updated
    cairo_t* _internalGetCairoContext() const { return cairo; }
  };

}

#include "cairoShimCairo.xcd"
#endif