first alpha version of libvncclient

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