Logo Search packages:      
Sourcecode: blender version File versions

IMG_Pixmap.h

/**
 * $Id: IMG_Pixmap.h,v 1.6 2002/12/26 18:25:14 mein Exp $
 * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
 *
 * 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. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

/**

 * $Id: IMG_Pixmap.h,v 1.6 2002/12/26 18:25:14 mein Exp $
 * Copyright (C) 2001 NaN Technologies B.V.
 * Abstract base class for pixmaps of different types.
 * @author  Maarten Gribnau
 * @date    March 6, 2001
 */

#ifndef _H_IMG_Pixmap
#define _H_IMG_Pixmap

#include "GEN_Types.h"
#include "GEN_Rect.h"


00048 class IMG_Pixmap
{
public:
      /** The type of pixels that are stored in this pixmap. */
00052         typedef enum {
00053            kPixelTypeUnknown       = 0,    /**< R:8, G:8, B:8, Ignore:8  */
/*         kPixelTypeRGB32         = 1, */ /*< R:8, G:8, B:8, Ignore:8   */
00055            kPixelTypeRGBA32        = 2,    /**< R:8, G:8, B:8, Alpha:8   */
/*         kPixelTypeRGB16         = 3, */ /**< Ignore:1, R:5, G:5, B:5  */
/*         kPixelTypeRGBA16        = 4, */ /**< Alpha:1,  R:5, G:5, B:5  */
/*         kPixelTypeRGB16_565     = 5, */ /**<           R:5, G:6, B:5  */
/*         kPixelTypeRGB24         = 6  */ /**< R:8, G:8, B:8            */
        } TPixelType;

      /**
       * Default constructor.
       */
      IMG_Pixmap();

      /**
       * Constructs a pixmap with the requested width and height.
       * @param width The width of the pixmap created.
       * @param height The height of the pixmap created.
       */
      IMG_Pixmap(GEN_TUns32 width, GEN_TUns32 height);

      /**
       * Destructor.
       */
      virtual     ~IMG_Pixmap();

      /**
       * Access to image data
       * @return  pointer to the image data
       */
      virtual void* getDataPtr() const = 0;

      /**
       * Access to image width.
       * @return  width of the image
       */
      inline GEN_TUns32 getWidth() const;

      /**
       * Access to image height.
       * @return  height of the image
       */
      inline GEN_TUns32 getHeight() const;

      /**
       * Returns the bounds of the pixmap in a rectangle.
       * @param   bounds of the image
       */
      inline void getBounds(GEN_Rect& r) const;

      /**
       * Access to pixel type.
       * @return  the pixel type
       */
      inline TPixelType getPixelType() const;

      /**
       * Clamps coordinates inside (0, 0) and (width, height).
       * @param   x     requested x-coordinate
       * @param   y     requested y-coordinate
       */
      inline void clamp(GEN_TInt32& x, GEN_TInt32& y) const;

      /**
       * Clamps u, v coordinates between 0 and 1.
       * @param   u     requested u-coordinate
       * @param   v     requested v-coordinate
       */
      inline void clamp(float& u, float& v) const;

      /**
       * Converts (u,v) coordinates to pixel addresses.
       * Assumes that (u,v) coordinates are in the [0,1] range.
       * @param   u     requested u-coordinate in the image
       * @param   v     requested v-coordinate in the image
       * @param   x     calculated x-coordinate in the image
       * @param   y     calculated y-coordinate in the image 
       */
      inline void getPixelAddress(float u, float v, GEN_TInt32& x, GEN_TInt32& y) const;

      /**
       * Fills the rectangle given with the color given.
       * Performs a bounds check.
       * @param   r     requested bounds rectangle in the image
       * @param   c     color to use
       */
      /*virtual void fillRect(const GEN_Rect& r, const IMG_ColorRGBA& c) = 0; */

protected:
      /** Width of the image in pixels */
00143       GEN_TUns32 m_width;
      /** Height of the image in pixels */
00145       GEN_TUns32 m_height;
      /** Number of bytes for one row in the image. */
00147       GEN_TUns32 m_rowBytes;
      /** Size in bits for one pixel */
00149       GEN_TUns32 m_pixelSize;
      /** Type of pixels in this image. */
00151       TPixelType m_pixelType;
/*    TEndian m_bitOrder;
      TEndian m_byteOrder;
*/
};

00157 inline GEN_TUns32 IMG_Pixmap::getWidth() const
{
      return m_width;
}

00162 inline GEN_TUns32 IMG_Pixmap::getHeight() const
{
      return m_height;
}

00167 inline void IMG_Pixmap::getBounds(GEN_Rect& r) const
{
      r.set(0, 0, m_width, m_height);
}

00172 inline IMG_Pixmap::TPixelType IMG_Pixmap::getPixelType() const
{
      return m_pixelType;
}

00177 inline void IMG_Pixmap::clamp(GEN_TInt32& x, GEN_TInt32& y) const
{
      if (x < 0) x = 0;
      if (x > (GEN_TInt32)m_width) x = (GEN_TInt32)m_width;
      if (y < 0) y = 0;
      if (y > (GEN_TInt32)m_height) y = (GEN_TInt32)m_height;
}

00185 inline void IMG_Pixmap::clamp(float& u, float& v) const
{
      if (u < 0.f) u = 0.f;
      if (u > 1.f) u = 1.f;
      if (v < 0.f) v = 0.f;
      if (v > 1.f) v = 1.f;
}

00193 inline void IMG_Pixmap::getPixelAddress(float u, float v, GEN_TInt32& x, GEN_TInt32& y) const
{
      x = (GEN_TInt32)(((float)m_width) * u);
      y = (GEN_TInt32)(((float)m_height) * v);
}

#endif /* _H_IMG_Pixmap */


Generated by  Doxygen 1.6.0   Back to index