SL-20229 Add GenericStreamingMessage and use it to receive GLTF material overrides

1 files changed, 72 insertions, 0 deletions

diff --git a/indra/llmessage/llgenericstreamingmessage.cpp b/indra/llmessage/llgenericstreamingmessage.cpp
new file mode 100644
index 0000000000..8627675c54
--- /dev/null
+++ b/indra/llmessage/llgenericstreamingmessage.cpp
@@ -0,0 +1,72 @@
+/**
+ * @file llgenericstreamingmessage.cpp
+ * @brief Generic Streaming Message helpers.  Shared between viewer and simulator.
+ *
+ * $LicenseInfo:firstyear=2023&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2023, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llgenericstreamingmessage.h"
+
+#include "message.h"
+
+void LLGenericStreamingMessage::send(LLMessageSystem* msg)
+{
+#if 0 // viewer cannot send GenericStreamingMessage
+    msg->newMessageFast(_PREHASH_GenericStreamingMessage);
+
+    if (mData.size() < 1024 * 7)
+    { // disable warning about big messages unless we're sending a REALLY big message
+        msg->tempDisableWarnAboutBigMessage();
+    }
+    else
+    {
+        LL_WARNS("Messaging") << "Attempted to send too large GenericStreamingMessage, dropping." << LL_ENDL;
+        return;
+    }
+
+    msg->nextBlockFast(_PREHASH_MethodData);
+    msg->addU16Fast(_PREHASH_Method, mMethod);
+    msg->nextBlockFast(_PREHASH_DataBlock);
+    msg->addStringFast(_PREHASH_Data, mData.c_str());
+#endif
+}
+
+void LLGenericStreamingMessage::unpack(LLMessageSystem* msg)
+{
+    U16* m = (U16*)&mMethod; // squirrely pass enum as U16 by reference
+    msg->getU16Fast(_PREHASH_MethodData, _PREHASH_Method, *m);
+
+    constexpr int MAX_SIZE = 7 * 1024;
+
+    char buffer[MAX_SIZE];
+
+    // NOTE: don't use getStringFast to avoid 1200 byte truncation
+    U32 size = msg->getSizeFast(_PREHASH_DataBlock, _PREHASH_Data);
+    msg->getBinaryDataFast(_PREHASH_DataBlock, _PREHASH_Data, buffer, size, 0, MAX_SIZE);
+
+    mData.assign(buffer, size);
+}
+
+
+