Initial commit

2020-09-20 12:16:44 +00:00
parent 09a4460ddb
commit 408c005d3e
839 changed files with 190481 additions and 0 deletions
--- a/common/rfb/ZRLEDecoder.cxx
+++ b/common/rfb/ZRLEDecoder.cxx
@@ -0,0 +1,119 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * Copyright 2009-2017 Pierre Ossman for Cendio AB
+ * 
+ * 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.
+ */
+
+#include <rdr/InStream.h>
+#include <rdr/MemInStream.h>
+#include <rdr/OutStream.h>
+
+#include <rfb/ConnParams.h>
+#include <rfb/PixelBuffer.h>
+#include <rfb/ZRLEDecoder.h>
+
+using namespace rfb;
+
+static inline rdr::U32 readOpaque24A(rdr::InStream* is)
+{
+  is->check(3);
+  rdr::U32 r=0;
+  ((rdr::U8*)&r)[0] = is->readU8();
+  ((rdr::U8*)&r)[1] = is->readU8();
+  ((rdr::U8*)&r)[2] = is->readU8();
+  return r;
+
+}
+static inline rdr::U32 readOpaque24B(rdr::InStream* is)
+{
+  is->check(3);
+  rdr::U32 r=0;
+  ((rdr::U8*)&r)[1] = is->readU8();
+  ((rdr::U8*)&r)[2] = is->readU8();
+  ((rdr::U8*)&r)[3] = is->readU8();
+  return r;
+}
+
+#define BPP 8
+#include <rfb/zrleDecode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/zrleDecode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/zrleDecode.h>
+#define CPIXEL 24A
+#include <rfb/zrleDecode.h>
+#undef CPIXEL
+#define CPIXEL 24B
+#include <rfb/zrleDecode.h>
+#undef CPIXEL
+#undef BPP
+
+ZRLEDecoder::ZRLEDecoder() : Decoder(DecoderOrdered)
+{
+}
+
+ZRLEDecoder::~ZRLEDecoder()
+{
+}
+
+void ZRLEDecoder::readRect(const Rect& r, rdr::InStream* is,
+                           const ConnParams& cp, rdr::OutStream* os)
+{
+  rdr::U32 len;
+
+  len = is->readU32();
+  os->writeU32(len);
+  os->copyBytes(is, len);
+}
+
+void ZRLEDecoder::decodeRect(const Rect& r, const void* buffer,
+                             size_t buflen, const ConnParams& cp,
+                             ModifiablePixelBuffer* pb)
+{
+  rdr::MemInStream is(buffer, buflen);
+  const rfb::PixelFormat& pf = cp.pf();
+  switch (pf.bpp) {
+  case 8:  zrleDecode8 (r, &is, &zis, pf, pb); break;
+  case 16: zrleDecode16(r, &is, &zis, pf, pb); break;
+  case 32:
+    {
+      if (pf.depth <= 24) {
+        Pixel maxPixel = pf.pixelFromRGB((rdr::U16)-1, (rdr::U16)-1, (rdr::U16)-1);
+        bool fitsInLS3Bytes = maxPixel < (1<<24);
+        bool fitsInMS3Bytes = (maxPixel & 0xff) == 0;
+
+        if ((fitsInLS3Bytes && pf.isLittleEndian()) ||
+            (fitsInMS3Bytes && pf.isBigEndian()))
+        {
+          zrleDecode24A(r, &is, &zis, pf, pb);
+          break;
+        }
+
+        if ((fitsInLS3Bytes && pf.isBigEndian()) ||
+            (fitsInMS3Bytes && pf.isLittleEndian()))
+        {
+          zrleDecode24B(r, &is, &zis, pf, pb);
+          break;
+        }
+      }
+
+      zrleDecode32(r, &is, &zis, pf, pb);
+      break;
+    }
+  }
+}