/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkGL2PSContextDevice2D.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/

// .NAME vtkGL2PSContextDevice2D - Class for drawing 2D primitives using GL2PS
//
// .SECTION Description
// This class takes care of drawing the 2D primitives for the vtkContext2D class.
// In general this class should not be used directly, but is used internally
// by the vtkGL2PSExporter.
//
// .SECTION See Also
// vtkGL2PSExporter

#ifndef __vtkGL2PSContextDevice2D_h
#define __vtkGL2PSContextDevice2D_h

#include "vtkRenderingGL2PSModule.h" // For export macro
#include "vtkOpenGLContextDevice2D.h"

class vtkPath;

class VTKRENDERINGGL2PS_EXPORT vtkGL2PSContextDevice2D
    : public vtkOpenGLContextDevice2D
{
public:
  vtkTypeMacro(vtkGL2PSContextDevice2D, vtkOpenGLContextDevice2D);
  virtual void PrintSelf(ostream &os, vtkIndent indent);

  static vtkGL2PSContextDevice2D *New();

  // Description:
  // Draw a poly line using the points - fastest code path due to memory
  // layout of the coordinates. The line will be colored by colors array
  // which has nc_comps components.
  //
  // If colors is not set and the current Pen's alpha channel is zero, no
  // OpenGL calls are emitted.
  virtual void DrawPoly(float *f, int n, unsigned char *colors = 0,
                        int nc_comps = 0);

  // Description:
  // Draw a series of points - fastest code path due to memory layout of the
  // coordinates. The colors and nc_comps are optional - color array.
  virtual void DrawPoints(float *points, int n, unsigned char* colors = 0,
                          int nc_comps = 0);

  // Description:
  // Draw a series of point sprites, images centred at the points supplied.
  // The supplied vtkImageData is the sprite to be drawn, only squares will be
  // drawn and the size is set using SetPointSize.
  // \param colors is an optional array of colors.
  // \param nc_comps is the number of components for the color.
  virtual void DrawPointSprites(vtkImageData *sprite, float *points, int n,
                                unsigned char *colors = 0, int nc_comps = 0);

  // Description:
  // Draw a quad using the specified number of points.
  virtual void DrawQuadStrip(float *, int);

  // Description:
  // Draw a polygon using the specified number of points.
  virtual void DrawPolygon(float *, int);

  // Description:
  // Draw an elliptic wedge with center at x, y, outer radii outRx, outRy,
  // inner radii inRx, inRy between angles startAngle and stopAngle
  // (expressed in degrees).
  // \pre positive_outRx: outRx>=0
  // \pre positive_outRy: outRy>=0
  // \pre positive_inRx: inRx>=0
  // \pre positive_inRy: inRy>=0
  // \pre ordered_rx: inRx<=outRx
  // \pre ordered_ry: inRy<=outRy
  virtual void DrawEllipseWedge(float x, float y, float outRx, float outRy,
                                float inRx, float inRy, float startAngle,
                                float stopAngle);

  // Description:
  // Draw an elliptic arc with center at x,y with radii rX and rY between
  // angles startAngle and stopAngle (expressed in degrees).
  // \pre positive_rX: rX>=0
  // \pre positive_rY: rY>=0
  virtual void DrawEllipticArc(float x, float y, float rX, float rY,
                               float startAngle, float stopAngle);

  // Description:
  // Draw a series of markers centered at the points supplied. The \a shape
  // argument controls the marker shape, and can be one of
  //   - VTK_MARKER_CROSS
  //   - VTK_MARKER_PLUS
  //   - VTK_MARKER_SQUARE
  //   - VTK_MARKER_CIRCLE
  //   - VTK_MARKER_DIAMOND
  // \param colors is an optional array of colors.
  // \param nc_comps is the number of components for the color.
  virtual void DrawMarkers(int shape, bool highlight, float *points, int n,
                           unsigned char *colors = 0, int nc_comps = 0);

  // Description:
  // Draws a rectangle
  virtual void DrawQuad(float *points, int n);

  // Description:
  // Draw some text to the screen!
  virtual void DrawString(float *point, const vtkStdString &string);

  // Description:
  // Draw some text to the screen.
  virtual void DrawString(float *point, const vtkUnicodeString &string);

  // Description:
  // Draw text using MathText markup for mathematical equations. See
  // http://matplotlib.sourceforge.net/users/mathtext.html for more information.
  virtual void DrawMathTextString(float point[2], const vtkStdString &string);

  // Description:
  // Apply the supplied pen which controls the outlines of shapes, as well as
  // lines, points and related primitives. This makes a deep copy of the vtkPen
  // object in the vtkContext2D, it does not hold a pointer to the supplied object.
  void ApplyPen(vtkPen *pen);

  // Description:
  // Set the point size for glyphs/sprites.
  virtual void SetPointSize(float size);

  // Description:
  // Set the line width for glyphs/sprites.
  virtual void SetLineWidth(float width);

  // Description:
  // Set the line type type (using anonymous enum in vtkPen).
  virtual void SetLineType(int type);

protected:
  vtkGL2PSContextDevice2D();
  virtual ~vtkGL2PSContextDevice2D();

private:
  vtkGL2PSContextDevice2D(const vtkGL2PSContextDevice2D &); // Not implemented.
  void operator=(const vtkGL2PSContextDevice2D &);   // Not implemented.

  void DrawCrossMarkers(bool highlight, float *points, int n,
                        unsigned char *colors, int nc_comps);
  void DrawPlusMarkers(bool highlight, float *points, int n,
                       unsigned char *colors, int nc_comps);
  void DrawSquareMarkers(bool highlight, float *points, int n,
                         unsigned char *colors, int nc_comps);
  void DrawCircleMarkers(bool highlight, float *points, int n,
                         unsigned char *colors, int nc_comps);
  void DrawDiamondMarkers(bool highlight, float *points, int n,
                          unsigned char *colors, int nc_comps);
  void AddEllipseToPath(vtkPath *path, float x, float y, float rx, float ry,
                        bool reverse);

  // Transform the path using the current modelview matrix.
  void TransformPath(vtkPath *path) const;

  // Transform the 2D point using the current modelview matrix.
  void TransformPoint(float &x, float &y) const;

  // Transform the width and height from pixels to data units.
  void TransformSize(float &dx, float &dy) const;
};

#endif //__vtkGL2PSContextDevice2D_h
