Shared TDE VNC library sources
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libtdevnc/libvncclient/hextile.c

128 lines
3.3 KiB

/*
* 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 CONCAT3E(uint,BPP,_t)
static rfbBool
HandleHextileBPP (rfbClient* client, int rx, int ry, int rw, int rh)
{
CARDBPP bg, fg;
int i;
uint8_t *ptr;
int x, y, w, h;
int sx, sy, sw, sh;
uint8_t subencoding;
uint8_t 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(client, (char *)&subencoding, 1))
return FALSE;
if (subencoding & rfbHextileRaw) {
if (!ReadFromRFBServer(client, client->buffer, w * h * (BPP / 8)))
return FALSE;
client->GotBitmap(client, (uint8_t *)client->buffer, x, y, w, h);
continue;
}
if (subencoding & rfbHextileBackgroundSpecified)
if (!ReadFromRFBServer(client, (char *)&bg, sizeof(bg)))
return FALSE;
client->GotFillRect(client, x, y, w, h, bg);
if (subencoding & rfbHextileForegroundSpecified)
if (!ReadFromRFBServer(client, (char *)&fg, sizeof(fg)))
return FALSE;
if (!(subencoding & rfbHextileAnySubrects)) {
continue;
}
if (!ReadFromRFBServer(client, (char *)&nSubrects, 1))
return FALSE;
ptr = (uint8_t*)client->buffer;
if (subencoding & rfbHextileSubrectsColoured) {
if (!ReadFromRFBServer(client, client->buffer, nSubrects * (2 + (BPP / 8))))
return FALSE;
for (i = 0; i < nSubrects; i++) {
#if BPP==8
GET_PIXEL8(fg, ptr);
#elif BPP==16
GET_PIXEL16(fg, ptr);
#elif BPP==32
GET_PIXEL32(fg, ptr);
#else
#error "Invalid BPP"
#endif
sx = rfbHextileExtractX(*ptr);
sy = rfbHextileExtractY(*ptr);
ptr++;
sw = rfbHextileExtractW(*ptr);
sh = rfbHextileExtractH(*ptr);
ptr++;
client->GotFillRect(client, x+sx, y+sy, sw, sh, fg);
}
} else {
if (!ReadFromRFBServer(client, client->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++;
client->GotFillRect(client, x+sx, y+sy, sw, sh, fg);
}
}
}
}
return TRUE;
}
#undef CARDBPP