File u_Fix_tight_decoder_on_888_encodings.patch of Package vncmanager

From: Petr Tesarik <ptesarik@suse.com>
Subject: Fix calculation of raw 888 pixel data length in Tight encoding
References: bsc#1169732
Upstream: merged
Git-commit: e3c7982e56183a1f8b1f65cae3ee7b080c48e17d

When raw pixel data is sent and pixels are encoded as three 8-bit
true colour values aligned on byte boundaries, the Tight encoding
always uses three bytes per pixel.

Signed-off-by: Petr Tesarik <ptesarik@suse.com>
---
 VncTunnel.cpp |    4 +++-
 rfb.h         |   13 +++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

--- a/VncTunnel.cpp
+++ b/VncTunnel.cpp
@@ -623,7 +623,9 @@ void VncTunnel::processFramebufferUpdate
                     } else {
                         bpp = 8;
                     }
-                }
+                } else if (m_pixelFormat.is888()) {
+		    bpp = 24;
+		}
 
                 std::size_t dataSize = (rectangle.width * bpp + 7) / 8 * rectangle.height;
                 if (dataSize < TightMinSizeToCompress) {
--- a/rfb.h
+++ b/rfb.h
@@ -147,6 +147,19 @@ struct PixelFormat {
         // Validating only things that could hurt vncmanager. If there are some other wrong values, underlying VNC server should complain.
         return bitsPerPixel == 8 || bitsPerPixel == 16 || bitsPerPixel == 24 || bitsPerPixel == 32;
     }
+
+    bool is888() const {
+	return
+	    trueColourFlag &&
+	    bitsPerPixel == 32 &&
+	    depth == 24 &&
+	    redMax == 255 &&
+	    greenMax == 255 &&
+	    blueMax == 255 &&
+	    (redShift & 0x07) == 0 &&
+	    (greenShift & 0x07) == 0 &&
+	    (blueShift & 0x07) == 0;
+    }
 };
 
 struct ServerInitMessage {