livetrax/libs/cairomm/cairomm/pattern.h

/* Copyright (C) 2005 The cairomm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef __CAIROMM_PATTERN_H
#define __CAIROMM_PATTERN_H

#include <cairomm/surface.h>
#include <cairomm/enums.h>
#include <cairo.h>


namespace Cairo
{

/**
 * This is a reference-counted object that should be used via Cairo::RefPtr.
 */
class Pattern
{
protected:
  //Use derived constructors.

  //TODO?: Pattern(cairo_pattern_t *target);

public:

  /** Create a C++ wrapper for the C instance. This C++ instance should then be given to a RefPtr.
   * @param cobject The C instance.
   * @param has_reference Whether we already have a reference. Otherwise, the constructor will take an extra reference.
   */
  explicit Pattern(cairo_pattern_t* cobject, bool has_reference = false);

  virtual ~Pattern();

  void set_matrix(const cairo_matrix_t &matrix);
  void get_matrix(cairo_matrix_t &matrix) const;
  PatternType get_type() const;

  typedef cairo_pattern_t cobject;
  inline cobject* cobj() { return m_cobject; }
  inline const cobject* cobj() const { return m_cobject; }

  #ifndef DOXYGEN_IGNORE_THIS
  ///For use only by the cairomm implementation.
  inline ErrorStatus get_status() const
  { return cairo_pattern_status(const_cast<cairo_pattern_t*>(cobj())); }
  #endif //DOXYGEN_IGNORE_THIS

  void reference() const;
  void unreference() const;

protected:
  //Used by derived types only.
  Pattern();

  cobject* m_cobject;
};

class SolidPattern : public Pattern
{
protected:

public:

  /** Create a C++ wrapper for the C instance.
   * @param cobject The C instance.
   * @param has_reference Whether we already have a reference. Otherwise, the constructor will take an extra reference.
   */
  explicit SolidPattern(cairo_pattern_t* cobject, bool has_reference = false);

  static RefPtr<SolidPattern> create_rgb(double red, double green, double blue);
  static RefPtr<SolidPattern> create_rgba(double red, double green, double blue, double alpha);

  //TODO?: SolidPattern(cairo_pattern_t *target);
  virtual ~SolidPattern();
};

class SurfacePattern : public Pattern
{
protected:

  explicit SurfacePattern(const RefPtr<Surface>& surface);

  //TODO?: SurfacePattern(cairo_pattern_t *target);

public:

  /** Create a C++ wrapper for the C instance. This C++ instance should then be given to a RefPtr.
   * @param cobject The C instance.
   * @param has_reference Whether we already have a reference. Otherwise, the constructor will take an extra reference.
   */
  explicit SurfacePattern(cairo_pattern_t* cobject, bool has_reference = false);


  virtual ~SurfacePattern();

  static RefPtr<SurfacePattern> create(const RefPtr<Surface>& surface);

  void set_extend(Extend extend);
  Extend get_extend() const;
  void set_filter(Filter filter);
  Filter get_filter() const;
};

class Gradient : public Pattern
{
protected:
  //Use derived constructors.

  //TODO?: Gradient(cairo_pattern_t *target);

public:

  /** Create a C++ wrapper for the C instance. This C++ instance should then be given to a RefPtr.
   * @param cobject The C instance.
   * @param has_reference Whether we already have a reference. Otherwise, the constructor will take an extra reference.
   */
  explicit Gradient(cairo_pattern_t* cobject, bool has_reference = false);

  virtual ~Gradient();

  void add_color_stop_rgb(double offset, double red, double green, double blue);
  void add_color_stop_rgba(double offset, double red, double green, double blue, double alpha);

protected:
  Gradient();
};

class LinearGradient : public Gradient
{
protected:

  LinearGradient(double x0, double y0, double x1, double y1);

public:

  /** Create a C++ wrapper for the C instance. This C++ instance should then be given to a RefPtr.
   * @param cobject The C instance.
   * @param has_reference Whether we already have a reference. Otherwise, the constructor will take an extra reference.
   */
  explicit LinearGradient(cairo_pattern_t* cobject, bool has_reference = false);

  //TODO?: LinearGradient(cairo_pattern_t *target);
  virtual ~LinearGradient();

  static RefPtr<LinearGradient> create(double x0, double y0, double x1, double y1);
};

class RadialGradient : public Gradient
{
protected:

  RadialGradient(double cx0, double cy0, double radius0, double cx1, double cy1, double radius1);

public:

  /** Create a C++ wrapper for the C instance. This C++ instance should then be given to a RefPtr.
   * @param cobject The C instance.
   * @param has_reference Whether we already have a reference. Otherwise, the constructor will take an extra reference.
   */
  explicit RadialGradient(cairo_pattern_t* cobject, bool has_reference = false);


  //TODO?: RadialGradient(cairo_pattern_t *target);
  virtual ~RadialGradient();

  static RefPtr<RadialGradient> create(double cx0, double cy0, double radius0, double cx1, double cy1, double radius1);
};

} // namespace Cairo

#endif //__CAIROMM_PATTERN_H

// vim: ts=2 sw=2 et