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/*
* 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)
#define FillRectangleBPP CONCAT2E(FillRectangle,BPP)
static 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;
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;
CopyDataToScreen(buffer, x, y, w, h);
continue;
}
if (subencoding & rfbHextileBackgroundSpecified)
if (!ReadFromRFBServer((char *)&bg, sizeof(bg)))
return False;
LockFramebuffer();
FillRectangleBPP(bg, x, y, w, h);
if (subencoding & rfbHextileForegroundSpecified)
if (!ReadFromRFBServer((char *)&fg, sizeof(fg))) {
UnlockFramebuffer();
return False;
}
if (!(subencoding & rfbHextileAnySubrects)) {
UnlockFramebuffer();
SyncScreenRegion(x, y, w, h);
continue;
}
if (!ReadFromRFBServer((char *)&nSubrects, 1)) {
UnlockFramebuffer();
return False;
}
ptr = (CARD8 *)buffer;
if (subencoding & rfbHextileSubrectsColoured) {
if (!ReadFromRFBServer(buffer, nSubrects * (2 + (BPP / 8)))) {
UnlockFramebuffer();
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++;
FillRectangleBPP(fg, x+sx, y+sy, sw, sh);
}
} else {
if (!ReadFromRFBServer(buffer, nSubrects * 2)) {
UnlockFramebuffer();
return False;
}
for (i = 0; i < nSubrects; i++) {
sx = rfbHextileExtractX(*ptr);
sy = rfbHextileExtractY(*ptr);
ptr++;
sw = rfbHextileExtractW(*ptr);
sh = rfbHextileExtractH(*ptr);
ptr++;
FillRectangleBPP(fg, x+sx, y+sy, sw, sh);
}
}
UnlockFramebuffer();
SyncScreenRegion(x, y, w, h);
}
}
return True;
}
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