/*
 *  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
 *
 *  This 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 software 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 software; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 *  USA.
 */

/*
 * hextile.c - handle hextile encoding.
 *
 * This file shouldn't be compiled directly.  It is included multiple times by
 * rfbproto.c, each time with a different definition of the macro BPP.  For
 * each value of BPP, this file defines a function which handles a hextile
 * encoded rectangle with BPP bits per pixel.
 */

#define HandleHextileBPP CONCAT2E(HandleHextile,BPP)
#define CARDBPP CONCAT2E(CARD,BPP)
#define GET_PIXEL CONCAT2E(GET_PIXEL,BPP)

Bool
HandleHextileBPP (int rx, int ry, int rw, int rh)
{
  CARDBPP bg, fg;
  int i;
  CARD8 *ptr;
  int x, y, w, h;
  int sx, sy, sw, sh;
  CARD8 subencoding;
  CARD8 nSubrects;

  GdkGCValues gdkgcv;

  for (y = ry; y < ry+rh; y += 16) {
    for (x = rx; x < rx+rw; x += 16) {
      w = h = 16;
      if (rx+rw - x < 16)
	w = rx+rw - x;
      if (ry+rh - y < 16)
	h = ry+rh - y;
      if (!ReadFromRFBServer((char *)&subencoding, 1))
	return False;
      rfbCastUpdateBuf ((char *)&subencoding, 1, 0);
      if (subencoding & rfbHextileRaw) {
	if (!ReadFromRFBServer(buffer, w * h * (BPP / 8)))
	  return False;
	rfbCastUpdateBuf (buffer, w * h * (BPP / 8), 0);
	CopyDataToScreen(buffer, x, y, w, h);
	continue;
      }

      if (subencoding & rfbHextileBackgroundSpecified) {
	if (!ReadFromRFBServer((char *)&bg, sizeof(bg)))
	  return False;
        rfbCastUpdateBuf ((char *)&bg, sizeof(bg), 0);
      }
#if (BPP == 8)
      if (appData.useBGR233)
	gdkgcv.foreground.pixel = BGR233ToPixel[bg];
      else
#endif
	bzero(&gdkgcv.foreground.pixel, sizeof(int));
	gdkgcv.foreground.pixel = (int) bg;

        gdk_gc_set_foreground(gdkGC, &gdkgcv.foreground);
        draw_rectangle(gdkpixmap[page][da_num], gdkGC, TRUE, x, y, w, h, gdkgcv.foreground.pixel);

      if (subencoding & rfbHextileForegroundSpecified) {
	if (!ReadFromRFBServer((char *)&fg, sizeof(fg)))
	  return False;
	rfbCastUpdateBuf ((char *)&fg, sizeof(fg), 0);
      }

      if (!(subencoding & rfbHextileAnySubrects)) {
	continue;
      }

      if (!ReadFromRFBServer((char *)&nSubrects, 1))
	return False;
      rfbCastUpdateBuf ((char *)&nSubrects, 1, 0);

      ptr = (CARD8 *)buffer;

      if (subencoding & rfbHextileSubrectsColoured) {
	if (!ReadFromRFBServer(buffer, nSubrects * (2 + (BPP / 8))))
	  return False;
	rfbCastUpdateBuf (buffer, nSubrects * (2 + (BPP / 8)), 0);

	for (i = 0; i < nSubrects; i++) {
	  GET_PIXEL(fg, ptr);
	  sx = rfbHextileExtractX(*ptr);
	  sy = rfbHextileExtractY(*ptr);
	  ptr++;
	  sw = rfbHextileExtractW(*ptr);
	  sh = rfbHextileExtractH(*ptr);
	  ptr++;
#if (BPP == 8)
	  if (appData.useBGR233)
	    gdkgcv.foreground.pixel = BGR233ToPixel[fg];
	  else
#endif
	    gdkgcv.foreground.pixel = fg;

          gdk_gc_set_foreground(gdkGC, &gdkgcv.foreground);
	  draw_rectangle(gdkpixmap[page][da_num], gdkGC, TRUE, x+sx, y+sy, sw, sh, gdkgcv.foreground.pixel);
	}

      } else {
	if (!ReadFromRFBServer(buffer, nSubrects * 2))
	  return False;
	rfbCastUpdateBuf (buffer, nSubrects * 2, 0);

#if (BPP == 8)
	if (appData.useBGR233)
	  gdkgcv.foreground.pixel = BGR233ToPixel[fg];
	else
#endif
	  gdkgcv.foreground.pixel = fg;

        gdk_gc_set_foreground(gdkGC, &gdkgcv.foreground);

	for (i = 0; i < nSubrects; i++) {
	  sx = rfbHextileExtractX(*ptr);
	  sy = rfbHextileExtractY(*ptr);
	  ptr++;
	  sw = rfbHextileExtractW(*ptr);
	  sh = rfbHextileExtractH(*ptr);
	  ptr++;

	  draw_rectangle(gdkpixmap[page][da_num], gdkGC, TRUE, x+sx, y+sy, sw, sh, gdkgcv.foreground.pixel);
	}
      }
    }
  }

  return True;
}
