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canvas.h

Go to the documentation of this file.

#ifndef canvas_h
#define canvas_h


#include "fl/point.h"
#include "fl/matrix.h"
#include "fl/image.h"
#include "fl/pi.h"

#include <vector>
#include <string>
#include <fstream>


namespace fl
{
  // Generic Canvas interface -------------------------------------------------

  class Canvas
  {
  public:
        virtual ~Canvas ();
        virtual void drawDone ();  

        // Drawing functions are the primary interface
        virtual void drawPoint (const Point & p, unsigned int color = 0xFFFFFF);
        virtual void drawSegment (const Point & a, const Point & b, unsigned int color = 0xFFFFFF);
        virtual void drawLine (const Point & a, const Point & b, unsigned int color = 0xFFFFFF);  
        virtual void drawLine (float a, float b, float c, unsigned int color = 0xFFFFFF);  
        virtual void drawRay (const Point & p, float angle, unsigned int color = 0xFFFFFF);
        virtual void drawPolygon (const std::vector<Point> & points, unsigned int color = 0xFFFFFF);
        virtual void drawParallelogram (const Matrix<double> & S, float radius = 1.0f, unsigned int color = 0xFFFFFF);  
        virtual void drawParallelogram (const PointAffine & p, float radius = 1.0f, unsigned int color = 0xFFFFFF);  
        virtual void drawFilledRectangle (const Point & corner0, const Point & corner1, unsigned int colorFill = 0xFFFFFF);
        virtual void drawCircle (const Point & center, float radius, unsigned int color = 0xFFFFFF, float startAngle = 0, float endAngle = 2 * PI);
        virtual void drawEllipse (const Point & center, const Matrix2x2<double> & shape, float radius = 1.0f, unsigned int color = 0xFFFFFF, float startAngle = 0, float endAngle = 2 * PI, bool inverse = false);  
        virtual void drawEllipse (const Matrix<double> & S, float radius = 1.0f, unsigned int color = 0xFFFFFF);  
        virtual void drawText (const std::string & text, const Point & point, float size = 10, float angle = 0, unsigned int color = 0xFFFFFF);
        virtual void drawImage (const Image & image, Point & p, float width = -1, float height = -1);  

        // State information
        virtual void setTranslation (float x, float y);  
        virtual void setScale (float x, float y);  
        virtual void setLineWidth (float width);  
        virtual void setPointSize (float radius);  
  };


  // Specific Canvas implementations ------------------------------------------

  class CanvasImage : public Canvas, public Image
  {
  public:
        CanvasImage (const PixelFormat & format = GrayChar);
        CanvasImage (int width, int height, const PixelFormat & format = GrayChar);
        CanvasImage (const Image & that);
        void initialize ();
        virtual ~CanvasImage ();

        virtual void drawPoint (const Point & p, unsigned int color = 0xFFFFFF);
        virtual void drawSegment (const Point & a, const Point & b, unsigned int color = 0xFFFFFF);
        virtual void drawLine (float a, float b, float c, unsigned int color = 0xFFFFFF);
        virtual void drawRay (const Point & p, float angle, unsigned int color = 0xFFFFFF);
        virtual void drawPolygon (const std::vector<Point> & points, unsigned int color = 0xFFFFFF);
        virtual void drawFilledRectangle (const Point & corner0, const Point & corner1, unsigned int colorFill = 0xFFFFFF);
        virtual void drawEllipse (const Point & center, const Matrix2x2<double> & shape, float radius = 1, unsigned int color = 0xFFFFFF, float startAngle = 0, float endAngle = 2 * PI, bool inverse = false);

        virtual void setTranslation (float x, float y);
        virtual void setScale (float x, float y);
        virtual void setLineWidth (float width);
        virtual void setPointSize (float radius);

        Point trans (const Point & p);
        void pen (const Point & p, unsigned int color);

        float transX;
        float transY;
        float scaleX;
        float scaleY;
        float lineWidth;
        ImageOf<unsigned char> penTip;
        float pointRadius;
  };

  class CanvasPS : public Canvas
  {
  public:
        CanvasPS (const std::string & fileName, float width, float height);  
        virtual ~CanvasPS ();
        virtual void drawDone ();

        virtual void drawPoint (const Point & p, unsigned int color = 0);
        virtual void drawSegment (const Point & a, const Point & b, unsigned int color = 0);
        virtual void drawPolygon (const std::vector<Point> & points, unsigned int color = 0);
        virtual void drawCircle (const Point & center, float radius, unsigned int color = 0, float startAngle = 0, float endAngle = 2 * PI);
        virtual void drawEllipse (const Point & center, const Matrix2x2<double> & shape, float radius = 1, unsigned int color = 0, float startAngle = 0, float endAngle = 2 * PI, bool inverse = false);
        virtual void drawImage (const Image & image, Point & p, float width = -1, float height = -1);

        virtual void setTranslation (float x, float y);
        virtual void setScale (float x, float y);
        virtual void setLineWidth (float width);

        void expandColor (unsigned int color);

        std::ofstream psf;  
        float scale;  
        float lineWidth;
        float bboxT;  
        float bboxB;  
        float bboxL;  
        float bboxR;  
  };
}


#endif

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