ibuf16.h

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/*
 *  ibuf16.h - 16-bit image buffer.
 *
 *  Copyright (C) 1998-1999  Jeffrey S. Freedman
 *  Copyright (C) 2000-2001  The Exult Team
 *
 *  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef INCL_IBUF16
#define INCL_IBUF16 1

#include "imagebuf.h"

/*
 *  A 16-bit image buffer:
 */
class Image_buffer16 : public Image_buffer
  {
  unsigned short *palette;  // Palette for 8-bit graphics.
  void create_default_palette();
  unsigned short *get_pixels()  // Cast bits.
    { return (unsigned short *) bits; }
public:
  Image_buffer16(unsigned int w, unsigned int h, int dpth)
    : Image_buffer(w, h, dpth), palette(0)
    {
    create_default_palette();
    bits = new unsigned char[w*h*2];
    }
  ~Image_buffer16()
    {
    delete palette;
    }
          // Create pixel from r,g,b values.
  unsigned short rgb(unsigned short r, unsigned short g,
              unsigned short b)
    { return ((r&0x1f) << 11) + ((g&0x1f) << 6) + (b&0x1f); }
          // Set a palette color.
  void set_palette_color(unsigned char num,
    unsigned short r, unsigned short g, unsigned short b)
    {
    palette[num] = rgb(r, g, b);
    }
          // Set palette.
  void set_palette(unsigned char *rgbs, int maxval, 
            int brightness = 100);
          // Rotate palette colors.
  void rotate_colors(int first, int num, int upd);
  /*
   *  16-bit color methods.
   */
          // Fill with given pixel.
  virtual void fill16(unsigned short pix);
          // Fill rect. wth pixel.
  virtual void fill16(unsigned short pix, int srcw, int srch,
            int destx, int desty);
          // Fill line with pixel.
  virtual void fill_line16(unsigned short pix, int srcw,
            int destx, int desty);
          // Copy rectangle into here.
  virtual void copy16(unsigned short *src_pixels,
        int srcw, int srch, int destx, int desty);
  /*
   *  Depth-independent methods:
   */
  virtual Image_buffer *create_another(int w, int h)
    { return new Image_buffer16(w, h, depth); }
          // Copy within itself.
  virtual void copy(int srcx, int srcy, int srcw, int srch, 
              int destx, int desty);
          // Get rect. into another buf.
  virtual void get(Image_buffer *dest, int srcx, int srcy);
          // Put rect. back.
  virtual void put(Image_buffer *src, int destx, int desty);
  
  virtual void fill_static(int black, int gray, int white);

  /*
   *  8-bit color methods:
   */
          // Fill with given (8-bit) value.
  virtual void fill8(unsigned char val)
    { Image_buffer16::fill16(palette[val]); }
          // Fill rect. wth pixel.
  virtual void fill8(unsigned char val, int srcw, int srch,
            int destx, int desty)
    { Image_buffer16::fill16(
        palette[val], srcw, srch, destx, desty); }
          // Fill line with pixel.
  virtual void fill_line8(unsigned char val, int srcw,
            int destx, int desty)
    { Image_buffer16::fill_line16(palette[val], srcw,
              destx, desty); }
          // Copy rectangle into here.
  virtual void copy8(unsigned char *src_pixels,
        int srcw, int srch, int destx, int desty);
          // Copy line to here.
  virtual void copy_line8(unsigned char *src_pixels, int srcw,
            int destx, int desty);
          // Copy with translucency table.
  virtual void copy_line_translucent8(
    unsigned char *src_pixels, int srcw,
    int destx, int desty, int first_translucent,
    int last_translucent, Xform_palette *xforms)
    { copy_line8(src_pixels, srcw, destx, desty); }
          // Apply translucency to a line.
  virtual void fill_line_translucent8(unsigned char val,
      int srcw, int destx, int desty, Xform_palette& xform)
    { fill_line8(val, srcw, destx, desty); }
          // Apply translucency to a rectangle
  virtual void fill_translucent8(unsigned char val, int srcw, int srch, 
        int destx, int desty, Xform_palette& xform)
    { fill8(val, srcw, srcw, destx, desty); }
          // Copy rect. with transp. color.
  virtual void copy_transparent8(unsigned char *src_pixels, int srcw,
          int srch, int destx, int desty);
  };

#endif

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