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-rw-r--r--libvncclient/hextile.c120
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