Initial commit

common/rfb/rreDecode.h

@@ -0,0 +1,64 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  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.
+ */
+//
+// RRE decoding function.
+//
+// This file is #included after having set the following macro:
+// BPP                - 8, 16 or 32
+
+#include <rdr/InStream.h>
+#include <rfb/Exception.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define READ_PIXEL CONCAT2E(readOpaque,BPP)
+#define RRE_DECODE CONCAT2E(rreDecode,BPP)
+
+void RRE_DECODE (const Rect& r, rdr::InStream* is,
+                 const PixelFormat& pf, ModifiablePixelBuffer* pb)
+{
+  int nSubrects = is->readU32();
+  PIXEL_T bg = is->READ_PIXEL();
+  pb->fillRect(pf, r, &bg);
+
+  for (int i = 0; i < nSubrects; i++) {
+    PIXEL_T pix = is->READ_PIXEL();
+    int x = is->readU16();
+    int y = is->readU16();
+    int w = is->readU16();
+    int h = is->readU16();
+
+    if (((x+w) > r.width()) || ((y+h) > r.height()))
+      throw Exception ("RRE decode error");
+
+    pb->fillRect(pf, Rect(r.tl.x+x, r.tl.y+y, r.tl.x+x+w, r.tl.y+y+h), &pix);
+  }
+}
+
+#undef PIXEL_T
+#undef READ_PIXEL
+#undef RRE_DECODE
+}