From ddd4af604a9cb37ba81d4ddf9b82625aa5817de0 Mon Sep 17 00:00:00 2001
From: Thijs Vermeir <thijsvermeir@gmail.com>
Date: Fri, 30 Nov 2007 14:08:15 +0000
Subject: gst/librfb/rfbdecoder.*: Add CoRRE encoding

Original commit message from CVS:
* gst/librfb/rfbdecoder.c:
* gst/librfb/rfbdecoder.h:
Add CoRRE encoding
---
 gst/librfb/rfbdecoder.c | 40 ++++++++++++++++++++++++++++++++++++++++
 gst/librfb/rfbdecoder.h |  1 +
 2 files changed, 41 insertions(+)

(limited to 'gst/librfb')

diff --git a/gst/librfb/rfbdecoder.c b/gst/librfb/rfbdecoder.c
index b4f255f3..04e95058 100644
--- a/gst/librfb/rfbdecoder.c
+++ b/gst/librfb/rfbdecoder.c
@@ -54,6 +54,8 @@ static void rfb_decoder_copyrect_encoding (RfbDecoder * decoder, gint start_x,
     gint start_y, gint rect_w, gint rect_h);
 static void rfb_decoder_rre_encoding (RfbDecoder * decoder, gint start_x,
     gint start_y, gint rect_w, gint rect_h);
+static void rfb_decoder_corre_encoding (RfbDecoder * decoder, gint start_x,
+    gint start_y, gint rect_w, gint rect_h);
 
 RfbDecoder *
 rfb_decoder_new (void)
@@ -429,6 +431,7 @@ rfb_decoder_state_set_encodings (RfbDecoder * decoder)
 
   GST_DEBUG ("entered set encodings");
 
+  encoder_list = g_slist_append (encoder_list, (guint32 *) ENCODING_TYPE_CORRE);
   encoder_list = g_slist_append (encoder_list, (guint32 *) ENCODING_TYPE_RRE);
   if (decoder->use_copyrect) {
     encoder_list =
@@ -618,6 +621,9 @@ rfb_decoder_state_framebuffer_update_rectangle (RfbDecoder * decoder)
     case ENCODING_TYPE_RRE:
       rfb_decoder_rre_encoding (decoder, x, y, w, h);
       break;
+    case ENCODING_TYPE_CORRE:
+      rfb_decoder_corre_encoding (decoder, x, y, w, h);
+      break;
     default:
       g_critical ("unimplemented encoding\n");
       break;
@@ -746,6 +752,40 @@ rfb_decoder_rre_encoding (RfbDecoder * decoder, gint start_x, gint start_y,
   }
 }
 
+static void
+rfb_decoder_corre_encoding (RfbDecoder * decoder, gint start_x, gint start_y,
+    gint rect_w, gint rect_h)
+{
+  guint8 *buffer;
+  guint32 number_of_rectangles, color;
+  guint8 x, y, w, h;
+
+  buffer = rfb_decoder_read (decoder, 4 + decoder->bytespp);
+  number_of_rectangles = RFB_GET_UINT32 (buffer);
+  color = GUINT32_SWAP_LE_BE ((RFB_GET_UINT32 (buffer + 4)));
+  g_free (buffer);
+
+  GST_DEBUG ("number of rectangles :%d", number_of_rectangles);
+
+  /* color the background of this rectangle */
+  rfb_decoder_fill_rectangle (decoder, start_x, start_y, rect_w, rect_h, color);
+
+  while (number_of_rectangles--) {
+
+    buffer = rfb_decoder_read (decoder, decoder->bytespp + 8);
+    color = GUINT32_SWAP_LE_BE ((RFB_GET_UINT32 (buffer)));
+    x = RFB_GET_UINT8 (buffer + decoder->bytespp);
+    y = RFB_GET_UINT8 (buffer + decoder->bytespp + 1);
+    w = RFB_GET_UINT8 (buffer + decoder->bytespp + 2);
+    h = RFB_GET_UINT8 (buffer + decoder->bytespp + 3);
+
+    /* draw the rectangle in the foreground */
+    rfb_decoder_fill_rectangle (decoder, start_x + x, start_y + y, w, h, color);
+
+    g_free (buffer);
+  }
+}
+
 static gboolean
 rfb_decoder_state_set_colour_map_entries (RfbDecoder * decoder)
 {
diff --git a/gst/librfb/rfbdecoder.h b/gst/librfb/rfbdecoder.h
index 4710c8b9..b5c6cf2a 100644
--- a/gst/librfb/rfbdecoder.h
+++ b/gst/librfb/rfbdecoder.h
@@ -20,6 +20,7 @@ G_BEGIN_DECLS enum
 #define ENCODING_TYPE_RAW                   0
 #define ENCODING_TYPE_COPYRECT              1
 #define ENCODING_TYPE_RRE                   2
+#define ENCODING_TYPE_CORRE                 4
 
 typedef struct _RfbDecoder RfbDecoder;
 
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