gr_Abi_RenderingContext.h

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/* AbiWord
 * Copyright (C) 2004 Luca Padovani <lpadovan@cs.unibo.it>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */

#ifndef __gr_Abi_RenderingContext_h__
#define __gr_Abi_RenderingContext_h__

#include <MathView/scaled.hh>
#include <MathView/BoundingBox.hh>
#include <MathView/RGBColor.hh>
#include <MathView/RenderingContext.hh>

#include "ut_color.h"
#include "ut_units.h" // for UT_LAYOUT_RESOLUTION

class GR_Abi_RenderingContext : public RenderingContext
{
public:
  GR_Abi_RenderingContext(class GR_Graphics*);
  virtual ~GR_Abi_RenderingContext();

  class GR_Graphics* getGraphics(void) const { return m_pGraphics; }

  void setColor(const RGBColor& c) { setColor(toAbiColor(c)); }
  void setColor(const UT_RGBColor&);
  // the return value is passed as an argument so that
  // we can use overloading
  void getColor(RGBColor&) const;
  void getColor(UT_RGBColor&) const;

  void fill(const scaled&, const scaled&, const BoundingBox&) const;
  void fill(const UT_RGBColor&, const scaled&, const scaled&, const BoundingBox&) const;
  void fill(const RGBColor& c, const scaled& x, const scaled& y, const BoundingBox& box) const
  { fill(toAbiColor(c), x, y, box); }

  void drawGlyph(const scaled&, const scaled&, class GR_Font*, UT_uint32) const;
  void drawChar(const scaled&, const scaled&, class GR_Font*, UT_UCS4Char) const;
  void drawBox(const scaled&, const scaled&, const BoundingBox&) const;

  // AbiWord layout units:
  // 1 inch = UT_LAYOUT_RESOLUTION dots
  // 1 inch = 72.27 points
  // 72.27 points = UT_LAYOUT_RESOLUTION dots
  // 1 point = UT_LAYOUT_RESOLUTION / 72.27 dots
  // 1 dot = 72.27 / UT_LAYOUT_RESOLUTION points
  UT_sint32 toAbiLayoutUnits(const scaled& s) const;
  scaled fromAbiLayoutUnits(UT_sint32 s) const;

  UT_sint32 toAbiX(const scaled& x) const;
  UT_sint32 toAbiY(const scaled& y) const;


  scaled fromAbiX(UT_sint32 x) const;
  scaled fromAbiY(UT_sint32 y) const;


  static RGBColor fromAbiColor(const UT_RGBColor& c)
  { return RGBColor(c.m_red, c.m_grn, c.m_blu, c.m_bIsTransparent); }
  static UT_RGBColor toAbiColor(const RGBColor& c)
  { return UT_RGBColor(c.red, c.green, c.blue, c.transparent()); }

private:
  class GR_Graphics* m_pGraphics;
};

#endif // __gr_Abi_RenderingContext_h__