diff options
Diffstat (limited to 'libvncclient/hextile.c')
-rw-r--r-- | libvncclient/hextile.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/libvncclient/hextile.c b/libvncclient/hextile.c new file mode 100644 index 0000000..e09fbc9 --- /dev/null +++ b/libvncclient/hextile.c @@ -0,0 +1,120 @@ +/* + * 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) +#define GET_PIXEL CONCAT2E(GET_PIXEL,BPP) + +static Bool +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; + + CopyRectangle(client, client->buffer, x, y, w, h); + + continue; + } + + if (subencoding & rfbHextileBackgroundSpecified) + if (!ReadFromRFBServer(client, (char *)&bg, sizeof(bg))) + return FALSE; + + FillRectangle(client, x, y, w, h, fg); + + 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++) { + GET_PIXEL(fg, ptr); + sx = rfbHextileExtractX(*ptr); + sy = rfbHextileExtractY(*ptr); + ptr++; + sw = rfbHextileExtractW(*ptr); + sh = rfbHextileExtractH(*ptr); + ptr++; + + FillRectangle(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++; + + FillRectangle(client, x+sx, y+sy, sw, sh, fg); + } + } + } + } + + return TRUE; +} + +#undef CARDBPP |