/************************************************************************
 *
 *  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.
 */

#ifdef HandleRREBPP
#undef HandleRREBPP
#endif
#ifdef ReceiveRREBPP
#undef ReceiveRREBPP
#endif
#ifdef flushRREBPP
#undef flushRREBPP
#endif
#ifdef CARDBPP
#undef CARDBPP
#endif
#ifdef HandleHextileBPP
#undef HandleHextileBPP
#endif
#ifdef GET_PIXEL
#undef GET_PIXEL
#endif


#define HandleHextileBPP CONCAT2E(HandleHextile,BPP)
#define ReceiveHextileBPP CONCAT2E(ReceiveHextile,BPP)
#define flushHextileBPP CONCAT2E(flushHextile,BPP)
#define CARDBPP CONCAT2E(CARD,BPP)
#define GET_PIXEL CONCAT2E(GET_PIXEL,BPP)

Bool
VNCViewer::HandleHextileBPP (sgVNCViewer *ct, 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;

    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;

            if (subencoding & rfbHextileRaw) {
                if (!ReadFromRFBServer(buffer, w * h * (BPP / 8)))
                    return False;

                ct->CopyDataToScreen(buffer, x, y, w, h);
                continue;
            }

            if (subencoding & rfbHextileBackgroundSpecified)
                if (!ReadFromRFBServer((char *)&bg, sizeof(bg)))
                    return False;

            ct->FillToScreen(bg, x, y, w, h);

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

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

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

            ptr = (CARD8 *)buffer;

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

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

                    ct->FillToScreen(fg, x+sx, y+sy, sw, sh);
                }

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

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

                    ct->FillToScreen(fg, x+sx, y+sy, sw, sh);
                }
            }
        }
    }

    return True;
}