1 files changed, 679 insertions, 0 deletions
diff --git a/nxcomp/RenderCompositeGlyphs.cpp b/nxcomp/RenderCompositeGlyphs.cpp
new file mode 100755
index 000000000..fa45d8fc1
--- /dev/null
+++ b/nxcomp/RenderCompositeGlyphs.cpp
@@ -0,0 +1,679 @@
+/**************************************************************************/
+/*                                                                        */
+/* 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 the template for
+// this message class.
+//
+
+#include "RenderCompositeGlyphs.h"
+
+//
+// Set the verbosity level.
+//
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#include MESSAGE_TAGS
+
+//
+// Message handling methods.
+//
+
+MESSAGE_BEGIN_ENCODE_SIZE
+{
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  #ifdef DEBUG
+  *logofs << name() << ": Encoding value "
+          << ((size - MESSAGE_OFFSET) >> 2) << ".\n"
+          << logofs_flush;
+  #endif
+
+  encodeBuffer.encodeCachedValue((size - MESSAGE_OFFSET) >> 2, 16,
+                     clientCache -> renderLengthCache, 5);
+
+  #ifdef TEST
+  *logofs << name() << ": Encoded size with value "
+          << size << ".\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_ENCODE_SIZE
+
+MESSAGE_BEGIN_DECODE_SIZE
+{
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  decodeBuffer.decodeCachedValue(size, 16,
+                     clientCache -> renderLengthCache, 5);
+
+  #ifdef DEBUG
+  *logofs << name() << ": Decoded value " << size
+          << ".\n" << logofs_flush;
+  #endif
+
+  size = MESSAGE_OFFSET + (size << 2);
+
+  buffer = writeBuffer -> addMessage(size);
+
+  #ifdef TEST
+  *logofs << name() << ": Decoded size with value "
+          << size << ".\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_DECODE_SIZE
+
+MESSAGE_BEGIN_ENCODE_MESSAGE
+{
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  encodeBuffer.encodeCachedValue(*(buffer + 4), 8,
+                     clientCache -> renderOpCache);
+
+  encodeBuffer.encodeXidValue(GetULONG(buffer + 8, bigEndian),
+                     clientCache -> renderSrcPictureCache);
+
+  encodeBuffer.encodeXidValue(GetULONG(buffer + 12, bigEndian),
+                     clientCache -> renderDstPictureCache);
+
+  encodeBuffer.encodeCachedValue(GetULONG(buffer + 16, bigEndian), 32,
+                     clientCache -> renderFormatCache);
+
+  encodeBuffer.encodeCachedValue(GetULONG(buffer + 20, bigEndian), 29,
+                     clientCache -> renderGlyphSetCache);
+
+  unsigned int src_x = GetUINT(buffer + 24, bigEndian);
+  unsigned int src_y = GetUINT(buffer + 26, bigEndian);
+
+  if (control -> isProtoStep8() == 1)
+  {
+    encodeBuffer.encodeDiffCachedValue(src_x,
+                       clientCache -> renderGlyphX, 16,
+                           clientCache -> renderGlyphXCache, 11);
+
+    encodeBuffer.encodeDiffCachedValue(src_y,
+                       clientCache -> renderGlyphY, 16,
+                           clientCache -> renderGlyphYCache, 11);
+  }
+  else
+  {
+    encodeBuffer.encodeDiffCachedValue(src_x,
+                       clientCache -> renderLastX, 16,
+                           clientCache -> renderXCache, 11);
+
+    encodeBuffer.encodeDiffCachedValue(src_y,
+                       clientCache -> renderLastY, 16,
+                           clientCache -> renderYCache, 11);
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Encoded source X "
+          << GetUINT(buffer + 24, bigEndian) << " source Y "
+          << GetUINT(buffer + 26, bigEndian) << ".\n"
+          << logofs_flush;
+  #endif
+
+  //
+  // Bytes from 28 to 36 contain in the order:
+  //
+  // 1 byte for the length of the first string.
+  // 3 bytes of padding.
+  // 2 bytes for the X offset.
+  // 2 bytes for the Y offset.
+  //
+  // Encode these bytes differentially to match
+  // all the strings that have equal glyphs.
+  //
+  // Only manage the first string of glyphs. The
+  // others strings should match, if they contain
+  // the same glyphs, since the offset are rela-
+  // tive to the first offset coordinates.
+  //
+
+  if (control -> isProtoStep8() == 1 &&
+          size >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    unsigned int numGlyphs = *(buffer + 28);
+
+    encodeBuffer.encodeCachedValue(numGlyphs, 8,
+                       clientCache -> renderNumGlyphsCache);
+
+    unsigned int offset_x = GetUINT(buffer + 32, bigEndian);
+    unsigned int offset_y = GetUINT(buffer + 34, bigEndian);
+
+    if (offset_x == src_x && offset_y == src_y)
+    {
+      encodeBuffer.encodeBoolValue(0);
+
+      #ifdef TEST
+      *logofs << name() << ": Matched offset X "
+              << GetUINT(buffer + 32, bigEndian) << " offset Y "
+              << GetUINT(buffer + 34, bigEndian) << ".\n"
+              << logofs_flush;
+      #endif
+    }
+    else
+    {
+      encodeBuffer.encodeBoolValue(1);
+
+      encodeBuffer.encodeDiffCachedValue(offset_x,
+                         clientCache -> renderGlyphX, 16,
+                             clientCache -> renderGlyphXCache, 11);
+
+      encodeBuffer.encodeDiffCachedValue(offset_y,
+                         clientCache -> renderGlyphY, 16,
+                             clientCache -> renderGlyphYCache, 11);
+
+      #ifdef TEST
+      *logofs << name() << ": Missed offset X "
+              << GetUINT(buffer + 32, bigEndian) << " offset Y "
+              << GetUINT(buffer + 34, bigEndian) << ".\n"
+              << logofs_flush;
+      #endif
+    }
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Encoded message. Type is "
+          << (unsigned int) *(buffer + 1) << " size is "
+          << size << ".\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_ENCODE_MESSAGE
+
+MESSAGE_BEGIN_DECODE_MESSAGE
+{
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  unsigned int value;
+
+  *(buffer + 1) = type;
+
+  decodeBuffer.decodeCachedValue(*(buffer + 4), 8,
+                     clientCache -> renderOpCache);
+
+  decodeBuffer.decodeXidValue(value,
+                     clientCache -> renderSrcPictureCache);
+
+  PutULONG(value, buffer + 8, bigEndian);
+
+  decodeBuffer.decodeXidValue(value,
+                     clientCache -> renderDstPictureCache);
+
+  PutULONG(value, buffer + 12, bigEndian);
+
+  decodeBuffer.decodeCachedValue(value, 32,
+                     clientCache -> renderFormatCache);
+
+  PutULONG(value, buffer + 16, bigEndian);
+
+  decodeBuffer.decodeCachedValue(value, 29,
+                     clientCache -> renderGlyphSetCache);
+
+  PutULONG(value, buffer + 20, bigEndian);
+
+  unsigned int src_x;
+  unsigned int src_y;
+
+  if (control -> isProtoStep8() == 1)
+  {
+    decodeBuffer.decodeDiffCachedValue(src_x,
+                       clientCache -> renderGlyphX, 16,
+                           clientCache -> renderGlyphXCache, 11);
+
+    decodeBuffer.decodeDiffCachedValue(src_y,
+                       clientCache -> renderGlyphY, 16,
+                           clientCache -> renderGlyphYCache, 11);
+  }
+  else
+  {
+    decodeBuffer.decodeDiffCachedValue(src_x,
+                       clientCache -> renderLastX, 16,
+                           clientCache -> renderXCache, 11);
+
+    decodeBuffer.decodeDiffCachedValue(src_y,
+                       clientCache -> renderLastY, 16,
+                           clientCache -> renderYCache, 11);
+  }
+
+  PutUINT(src_x, buffer + 24, bigEndian);
+  PutUINT(src_y, buffer + 26, bigEndian);
+
+  if (control -> isProtoStep8() == 1 &&
+          size >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    decodeBuffer.decodeCachedValue(value, 8,
+                       clientCache -> renderNumGlyphsCache);
+
+    *(buffer + 28) = value;
+
+    decodeBuffer.decodeBoolValue(value);
+
+    if (value == 0)
+    {
+      PutUINT(src_x, buffer + 32, bigEndian);
+      PutUINT(src_y, buffer + 34, bigEndian);
+    }
+    else
+    {
+      decodeBuffer.decodeDiffCachedValue(src_x,
+                         clientCache -> renderGlyphX, 16,
+                             clientCache -> renderGlyphXCache, 11);
+
+      PutUINT(src_x, buffer + 32, bigEndian);
+
+      decodeBuffer.decodeDiffCachedValue(src_y,
+                         clientCache -> renderGlyphY, 16,
+                             clientCache -> renderGlyphYCache, 11);
+
+      PutUINT(src_y, buffer + 34, bigEndian);
+    }
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Decoded message. Type is "
+          << (unsigned int) type << " size is " << size
+          << ".\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_DECODE_MESSAGE
+
+MESSAGE_BEGIN_ENCODE_DATA
+{
+  if (control -> isProtoStep8() == 1 &&
+          size >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    encodeCharData(encodeBuffer, buffer, MESSAGE_OFFSET_IF_PROTO_STEP_8,
+                       size, bigEndian, channelCache);
+  }
+  else if (size > MESSAGE_OFFSET)
+  {
+    encodeCharData(encodeBuffer, buffer, MESSAGE_OFFSET,
+                       size, bigEndian, channelCache);
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Encoded " << size - MESSAGE_OFFSET
+          << " bytes of text data.\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_ENCODE_DATA
+
+MESSAGE_BEGIN_DECODE_DATA
+{
+  if (control -> isProtoStep8() == 1 &&
+          size >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    decodeCharData(decodeBuffer, buffer, MESSAGE_OFFSET_IF_PROTO_STEP_8,
+                       size, bigEndian, channelCache);
+  }
+  else if (size > MESSAGE_OFFSET)
+  {
+    decodeCharData(decodeBuffer, buffer, MESSAGE_OFFSET,
+                       size, bigEndian, channelCache);
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Decoded " << size - MESSAGE_OFFSET
+          << " bytes of data.\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_DECODE_DATA
+
+MESSAGE_BEGIN_PARSE_IDENTITY
+{
+  RenderExtensionMessage *renderExtension = (RenderExtensionMessage *) message;
+
+  renderExtension -> data.composite_glyphs.type = *(buffer + 1);
+  renderExtension -> data.composite_glyphs.op   = *(buffer + 4);
+
+  renderExtension -> data.composite_glyphs.src_id = GetULONG(buffer + 8,  bigEndian);
+  renderExtension -> data.composite_glyphs.dst_id = GetULONG(buffer + 12, bigEndian);
+
+  renderExtension -> data.composite_glyphs.format = GetULONG(buffer + 16, bigEndian);
+  renderExtension -> data.composite_glyphs.set_id = GetULONG(buffer + 20, bigEndian);
+
+  renderExtension -> data.composite_glyphs.src_x = GetUINT(buffer + 24, bigEndian);
+  renderExtension -> data.composite_glyphs.src_y = GetUINT(buffer + 26, bigEndian);
+
+  if (control -> isProtoStep8() == 1 &&
+          size >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    renderExtension -> data.composite_glyphs.num_elm = *(buffer + 28);
+
+    renderExtension -> data.composite_glyphs.offset_x = GetUINT(buffer + 32, bigEndian);
+    renderExtension -> data.composite_glyphs.offset_y = GetUINT(buffer + 34, bigEndian);
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Parsed identity. Type is "
+          << (unsigned int) renderExtension -> data.composite_glyphs.type
+          << " size is " << renderExtension -> size_ << " identity size "
+          << renderExtension -> i_size_ << ".\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_PARSE_IDENTITY
+
+MESSAGE_BEGIN_UNPARSE_IDENTITY
+{
+  RenderExtensionMessage *renderExtension = (RenderExtensionMessage *) message;
+
+  *(buffer + 1) = renderExtension -> data.composite_glyphs.type;
+  *(buffer + 4) = renderExtension -> data.composite_glyphs.op;
+
+  PutULONG(renderExtension -> data.composite_glyphs.src_id, buffer + 8,  bigEndian);
+  PutULONG(renderExtension -> data.composite_glyphs.dst_id, buffer + 12, bigEndian);
+
+  PutULONG(renderExtension -> data.composite_glyphs.format, buffer + 16, bigEndian);
+  PutULONG(renderExtension -> data.composite_glyphs.set_id, buffer + 20, bigEndian);
+
+  PutUINT(renderExtension -> data.composite_glyphs.src_x, buffer + 24, bigEndian);
+  PutUINT(renderExtension -> data.composite_glyphs.src_y, buffer + 26, bigEndian);
+
+  if (control -> isProtoStep8() == 1 &&
+          size >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    *(buffer + 28) = renderExtension -> data.composite_glyphs.num_elm;
+
+    PutUINT(renderExtension -> data.composite_glyphs.offset_x, buffer + 32, bigEndian);
+    PutUINT(renderExtension -> data.composite_glyphs.offset_y, buffer + 34, bigEndian);
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Unparsed identity. Type is "
+          << (unsigned int) renderExtension -> data.composite_glyphs.type
+          << " size is " << renderExtension -> size_  << " identity size "
+          << renderExtension -> i_size_ <<  ".\n" << logofs_flush;
+  #endif
+}
+MESSAGE_END_UNPARSE_IDENTITY
+
+MESSAGE_BEGIN_IDENTITY_CHECKSUM
+{
+  //
+  // Include minor opcode, size and
+  // the composite operator in the
+  // identity.
+  //
+
+  md5_append(md5_state, buffer + 1, 4);
+
+  //
+  // Include the format.
+  //
+
+  md5_append(md5_state, buffer + 16, 4);
+
+  //
+  // Also include the length of the
+  // first string.
+  //
+
+  if (control -> isProtoStep8() == 1 &&
+          size >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    md5_append(md5_state, buffer + 28, 1);
+  }
+}
+MESSAGE_END_IDENTITY_CHECKSUM
+
+MESSAGE_BEGIN_ENCODE_UPDATE
+{
+  RenderExtensionMessage *renderExtension       = (RenderExtensionMessage *) message;
+  RenderExtensionMessage *cachedRenderExtension = (RenderExtensionMessage *) cachedMessage;
+
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  encodeBuffer.encodeXidValue(renderExtension -> data.composite_glyphs.src_id,
+                     clientCache -> renderSrcPictureCache);
+
+  cachedRenderExtension -> data.composite_glyphs.src_id =
+              renderExtension -> data.composite_glyphs.src_id;
+
+  encodeBuffer.encodeXidValue(renderExtension -> data.composite_glyphs.dst_id,
+                     clientCache -> renderDstPictureCache);
+
+  cachedRenderExtension -> data.composite_glyphs.dst_id =
+              renderExtension -> data.composite_glyphs.dst_id;
+
+  encodeBuffer.encodeCachedValue(renderExtension -> data.composite_glyphs.set_id, 29,
+                     clientCache -> renderGlyphSetCache);
+
+  cachedRenderExtension -> data.composite_glyphs.set_id =
+              renderExtension -> data.composite_glyphs.set_id;
+
+  //
+  // Src X and Y.
+  //
+  // The source X and Y coordinates are
+  // encoded as differerences in respect
+  // to the cached message.
+  //
+
+  unsigned int value;
+  unsigned int previous;
+
+  if (control -> isProtoStep8() == 1)
+  {
+    value    = renderExtension -> data.composite_glyphs.src_x;
+    previous = cachedRenderExtension -> data.composite_glyphs.src_x;
+
+    encodeBuffer.encodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderGlyphXCache, 11);
+
+    cachedRenderExtension -> data.composite_glyphs.src_x = value;
+
+    value    = renderExtension -> data.composite_glyphs.src_y;
+    previous = cachedRenderExtension -> data.composite_glyphs.src_y;
+
+    encodeBuffer.encodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderGlyphYCache, 11);
+
+    cachedRenderExtension -> data.composite_glyphs.src_y = value;
+  }
+  else
+  {
+    value    = renderExtension -> data.composite_glyphs.src_x;
+    previous = cachedRenderExtension -> data.composite_glyphs.src_x;
+
+    encodeBuffer.encodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderXCache, 11);
+
+    cachedRenderExtension -> data.composite_glyphs.src_x = value;
+
+    value    = renderExtension -> data.composite_glyphs.src_y;
+    previous = cachedRenderExtension -> data.composite_glyphs.src_y;
+
+    encodeBuffer.encodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderYCache, 11);
+
+    cachedRenderExtension -> data.composite_glyphs.src_y = value;
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Encoded source X "
+          << renderExtension -> data.composite_glyphs.src_x << " source Y "
+          << renderExtension -> data.composite_glyphs.src_y << ".\n"
+          << logofs_flush;
+  #endif
+
+  if (control -> isProtoStep8() == 1 &&
+          renderExtension -> size_ >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    //
+    // Offset X and Y.
+    //
+
+    if (renderExtension -> data.composite_glyphs.offset_x ==
+            renderExtension -> data.composite_glyphs.src_x &&
+                renderExtension -> data.composite_glyphs.offset_y ==
+                    renderExtension -> data.composite_glyphs.src_y)
+    {
+      encodeBuffer.encodeBoolValue(0);
+
+      cachedRenderExtension -> data.composite_glyphs.offset_x =
+            renderExtension -> data.composite_glyphs.offset_x;
+
+      cachedRenderExtension -> data.composite_glyphs.offset_y =
+            renderExtension -> data.composite_glyphs.offset_y;
+
+      #ifdef TEST
+      *logofs << name() << ": Matched offset X "
+              << renderExtension -> data.composite_glyphs.offset_x << " offset Y "
+              << renderExtension -> data.composite_glyphs.offset_y << ".\n"
+              << logofs_flush;
+      #endif
+    }
+    else
+    {
+      encodeBuffer.encodeBoolValue(1);
+
+      value    = renderExtension -> data.composite_glyphs.offset_x;
+      previous = cachedRenderExtension -> data.composite_glyphs.offset_x;
+
+      encodeBuffer.encodeDiffCachedValue(value, previous, 16,
+                         clientCache -> renderGlyphXCache, 11);
+
+      cachedRenderExtension -> data.composite_glyphs.offset_x = value;
+
+      value    = renderExtension -> data.composite_glyphs.offset_y;
+      previous = cachedRenderExtension -> data.composite_glyphs.offset_y;
+
+      encodeBuffer.encodeDiffCachedValue(value, previous, 16,
+                         clientCache -> renderGlyphYCache, 11);
+
+      cachedRenderExtension -> data.composite_glyphs.offset_y = value;
+
+      #ifdef TEST
+      *logofs << name() << ": Missed offset X "
+              << renderExtension -> data.composite_glyphs.offset_x << " offset Y "
+              << renderExtension -> data.composite_glyphs.offset_y << ".\n"
+              << logofs_flush;
+      #endif
+    }
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Encoded update. Type is "
+          << (unsigned int) renderExtension -> data.composite_glyphs.type
+          << " size is " << renderExtension -> size_ << ".\n"
+          << logofs_flush;
+  #endif
+}
+MESSAGE_END_ENCODE_UPDATE
+
+MESSAGE_BEGIN_DECODE_UPDATE
+{
+  RenderExtensionMessage *renderExtension = (RenderExtensionMessage *) message;
+
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  decodeBuffer.decodeXidValue(renderExtension -> data.composite_glyphs.src_id,
+                     clientCache -> renderSrcPictureCache);
+
+  decodeBuffer.decodeXidValue(renderExtension -> data.composite_glyphs.dst_id,
+                     clientCache -> renderDstPictureCache);
+
+  decodeBuffer.decodeCachedValue(renderExtension -> data.composite_glyphs.set_id, 29,
+                     clientCache -> renderGlyphSetCache);
+
+  //
+  // Src X and Y.
+  //
+
+  unsigned int value;
+  unsigned int previous;
+
+  if (control -> isProtoStep8() == 1)
+  {
+    previous = renderExtension -> data.composite_glyphs.src_x;
+
+    decodeBuffer.decodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderGlyphXCache, 11);
+
+    renderExtension -> data.composite_glyphs.src_x = value;
+
+    previous = renderExtension -> data.composite_glyphs.src_y;
+
+    decodeBuffer.decodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderGlyphYCache, 11);
+
+    renderExtension -> data.composite_glyphs.src_y = value;
+  }
+  else
+  {
+    previous = renderExtension -> data.composite_glyphs.src_x;
+
+    decodeBuffer.decodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderXCache, 11);
+
+    renderExtension -> data.composite_glyphs.src_x = value;
+
+    previous = renderExtension -> data.composite_glyphs.src_y;
+
+    decodeBuffer.decodeDiffCachedValue(value, previous, 16,
+                       clientCache -> renderYCache, 11);
+
+    renderExtension -> data.composite_glyphs.src_y = value;
+  }
+
+  if (control -> isProtoStep8() == 1 &&
+          renderExtension -> size_ >= MESSAGE_OFFSET_IF_PROTO_STEP_8)
+  {
+    //
+    // Offset X and Y.
+    //
+
+    decodeBuffer.decodeBoolValue(value);
+
+    if (value == 0)
+    {
+      renderExtension -> data.composite_glyphs.offset_x =
+            renderExtension -> data.composite_glyphs.src_x;
+
+      renderExtension -> data.composite_glyphs.offset_y =
+            renderExtension -> data.composite_glyphs.src_y;
+    }
+    else
+    {
+      previous = renderExtension -> data.composite_glyphs.offset_x;
+
+      decodeBuffer.decodeDiffCachedValue(value, previous, 16,
+                         clientCache -> renderGlyphXCache, 11);
+
+      renderExtension -> data.composite_glyphs.offset_x = value;
+
+      previous = renderExtension -> data.composite_glyphs.offset_y;
+
+      decodeBuffer.decodeDiffCachedValue(value, previous, 16,
+                         clientCache -> renderGlyphYCache, 11);
+
+      renderExtension -> data.composite_glyphs.offset_y = value;
+    }
+  }
+
+  #ifdef TEST
+  *logofs << name() << ": Decoded update. Type is "
+          << (unsigned int) renderExtension -> data.composite_glyphs.type
+          << " size is " << renderExtension -> size_ << ".\n"
+          << logofs_flush;
+  #endif
+}
+MESSAGE_END_DECODE_UPDATE