aboutsummaryrefslogtreecommitdiff
path: root/nxcomp/Rle.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'nxcomp/Rle.cpp')
-rwxr-xr-xnxcomp/Rle.cpp94
1 files changed, 94 insertions, 0 deletions
diff --git a/nxcomp/Rle.cpp b/nxcomp/Rle.cpp
new file mode 100755
index 000000000..4173e1632
--- /dev/null
+++ b/nxcomp/Rle.cpp
@@ -0,0 +1,94 @@
+/**************************************************************************/
+/* */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/. */
+/* */
+/* NXCOMP, NX protocol compression and NX extensions to this software */
+/* are copyright of NoMachine. Redistribution and use of the present */
+/* software is allowed according to terms specified in the file LICENSE */
+/* which comes in the source distribution. */
+/* */
+/* Check http://www.nomachine.com/licensing.html for applicability. */
+/* */
+/* NX and NoMachine are trademarks of NoMachine S.r.l. */
+/* */
+/* All rights reserved. */
+/* */
+/**************************************************************************/
+
+#include "Misc.h"
+#include "Rle.h"
+
+#define PANIC
+#define WARNING
+#undef TEST
+#undef DEBUG
+
+int UnpackRle(T_geometry *geometry, unsigned char method, unsigned char *src_data,
+ int src_size, int dst_bpp, int dst_width, int dst_height,
+ unsigned char *dst_data, int dst_size)
+{
+ if (*src_data == 0)
+ {
+ if (dst_size != src_size - 1)
+ {
+ #ifdef TEST
+ *logofs << "UnpackRle: PANIC! Invalid destination size "
+ << dst_size << " with source " << src_size
+ << ".\n" << logofs_flush;
+ #endif
+
+ return -1;
+ }
+
+ #ifdef TEST
+ *logofs << "UnpackRle: Expanding " << src_size - 1
+ << " bytes of plain RLE data.\n" << logofs_flush;
+ #endif
+
+ memcpy(dst_data, src_data + 1, src_size - 1);
+
+ return 1;
+ }
+
+ unsigned int check_size = dst_size;
+
+ int result = ZDecompress(&unpackStream, dst_data, &check_size,
+ src_data + 1, src_size - 1);
+
+ if (result != Z_OK)
+ {
+ #ifdef PANIC
+ *logofs << "UnpackRle: PANIC! Failure decompressing RLE data. "
+ << "Error is '" << zError(result) << "'.\n"
+ << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Failure decompressing RLE data. "
+ << "Error is '" << zError(result) << "'.\n";
+
+ return -1;
+ }
+ else if (check_size != (unsigned int) dst_size)
+ {
+ #ifdef PANIC
+ *logofs << "UnpackRle: PANIC! Size mismatch in RLE data. "
+ << "Resulting size is " << check_size << " with "
+ << "expected size " << dst_size << ".\n"
+ << logofs_flush;
+ #endif
+
+ cerr << "Error" << ": Size mismatch in RLE data. "
+ << "Resulting size is " << check_size << " with "
+ << "expected size " << dst_size << ".\n";
+
+ return -1;
+ }
+
+ #ifdef TEST
+ *logofs << "UnpackRle: Decompressed " << src_size - 1
+ << " bytes to " << dst_size << " bytes of RLE data.\n"
+ << logofs_flush;
+ #endif
+
+ return 1;
+}