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130 lines
3.3 KiB
130 lines
3.3 KiB
/*
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* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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/*
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* hextile.c - handle hextile encoding.
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*
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* This file shouldn't be compiled directly. It is included multiple times by
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* rfbproto.c, each time with a different definition of the macro BPP. For
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* each value of BPP, this file defines a function which handles a hextile
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* encoded rectangle with BPP bits per pixel.
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*/
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#define HandleHextileBPP CONCAT2E(HandleHextile,BPP)
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#define CARDBPP CONCAT2E(CARD,BPP)
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#define GET_PIXEL CONCAT2E(GET_PIXEL,BPP)
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#define FillRectangleBPP CONCAT2E(FillRectangle,BPP)
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static Bool
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HandleHextileBPP (int rx, int ry, int rw, int rh)
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{
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CARDBPP bg, fg;
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int i;
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CARD8 *ptr;
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int x, y, w, h;
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int sx, sy, sw, sh;
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CARD8 subencoding;
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CARD8 nSubrects;
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for (y = ry; y < ry+rh; y += 16) {
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for (x = rx; x < rx+rw; x += 16) {
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w = h = 16;
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if (rx+rw - x < 16)
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w = rx+rw - x;
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if (ry+rh - y < 16)
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h = ry+rh - y;
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if (!ReadFromRFBServer((char *)&subencoding, 1))
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return False;
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if (subencoding & rfbHextileRaw) {
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if (!ReadFromRFBServer(buffer, w * h * (BPP / 8)))
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return False;
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CopyDataToScreen(buffer, x, y, w, h);
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continue;
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}
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if (subencoding & rfbHextileBackgroundSpecified)
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if (!ReadFromRFBServer((char *)&bg, sizeof(bg)))
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return False;
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LockFramebuffer();
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FillRectangleBPP(bg, x, y, w, h);
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if (subencoding & rfbHextileForegroundSpecified)
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if (!ReadFromRFBServer((char *)&fg, sizeof(fg))) {
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UnlockFramebuffer();
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return False;
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}
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if (!(subencoding & rfbHextileAnySubrects)) {
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UnlockFramebuffer();
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SyncScreenRegion(x, y, w, h);
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continue;
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}
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if (!ReadFromRFBServer((char *)&nSubrects, 1)) {
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UnlockFramebuffer();
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return False;
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}
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ptr = (CARD8 *)buffer;
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if (subencoding & rfbHextileSubrectsColoured) {
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if (!ReadFromRFBServer(buffer, nSubrects * (2 + (BPP / 8)))) {
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UnlockFramebuffer();
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return False;
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}
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for (i = 0; i < nSubrects; i++) {
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GET_PIXEL(fg, ptr);
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sx = rfbHextileExtractX(*ptr);
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sy = rfbHextileExtractY(*ptr);
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ptr++;
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sw = rfbHextileExtractW(*ptr);
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sh = rfbHextileExtractH(*ptr);
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ptr++;
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FillRectangleBPP(fg, x+sx, y+sy, sw, sh);
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}
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} else {
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if (!ReadFromRFBServer(buffer, nSubrects * 2)) {
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UnlockFramebuffer();
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return False;
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}
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for (i = 0; i < nSubrects; i++) {
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sx = rfbHextileExtractX(*ptr);
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sy = rfbHextileExtractY(*ptr);
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ptr++;
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sw = rfbHextileExtractW(*ptr);
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sh = rfbHextileExtractH(*ptr);
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ptr++;
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FillRectangleBPP(fg, x+sx, y+sy, sw, sh);
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}
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}
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UnlockFramebuffer();
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SyncScreenRegion(x, y, w, h);
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}
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}
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return True;
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}
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