ibuf8.h

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/*
 *  ibuf8.h - 8-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_IBUF8
#define INCL_IBUF8  1

#include "imagebuf.h"

/*
 *  An 8-bit image buffer:
 */
class Image_buffer8 : public Image_buffer
  {
          // Private ctor. for Image_window8.
  Image_buffer8(unsigned int w, unsigned int h, Image_buffer *)
    : Image_buffer(w, h, 8)
    {  }
public:
  Image_buffer8(unsigned int w, unsigned int h)
    : Image_buffer(w, h, 8)
    { bits = new unsigned char[w*h]; }
  friend class Image_window8;
  /*
   *  Depth-independent methods:
   */
  virtual Image_buffer *create_another(int w, int h)
    { return new Image_buffer8(w, h); }
          // 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);
          // Fill rect. wth pixel.
  virtual void fill8(unsigned char val, int srcw, int srch,
            int destx, int desty);
          // Fill line with pixel.
  virtual void fill_line8(unsigned char val, int srcw,
            int destx, int 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);
          // Apply translucency to a line.
  virtual void fill_line_translucent8(unsigned char val,
      int srcw, int destx, int desty, Xform_palette& xform);
          // Apply translucency to a rectangle
  virtual void fill_translucent8(unsigned char val, int srcw, int srch, 
        int destx, int desty, Xform_palette& xform);
          // Copy rect. with transp. color.
  virtual void copy_transparent8(unsigned char *src_pixels, int srcw,
          int srch, int destx, int desty);
          // Get/put a single pixel.
  unsigned char get_pixel8(int x, int y)
    { return bits[y*line_width + x]; }
  void put_pixel8(unsigned char pix, int x, int y)
    { 
    if (x >= clipx && x < clipx + clipw &&
        y >= clipy && y < clipy + cliph)
      bits[y*line_width + x] = pix;
    }

  void paint_rle (int xoff, int yoff, unsigned char *in);
          // Convert to 32-bit rgba.
  unsigned char *rgba(unsigned char *pal, unsigned char transp, 
    int first_translucent = 256,
    int last_translucent = 256, Xform_palette *xforms = 0);
  };

#endif

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