Expose the total number of sections via ICaptureAccess

* This lets external code iterate over all sections.

renderdoc/api/replay/renderdoc_replay.h

@@ -1103,6 +1103,13 @@ and construction of files.
 )");
 struct ICaptureAccess
 {
+  DOCUMENT(R"(Retrieve the total number of available sections.
+
+:return: The number of sections in the capture
+:rtype: ``int``.
+)");
+  virtual int GetSectionCount() = 0;
+
   DOCUMENT(R"(Locate the index of a section by its name. Returns ``-1`` if the section is not found.
 
 This index should not be cached, as writing sections could re-order the indices.

renderdoc/core/remote_server.cpp

@@ -35,7 +35,7 @@
 #include "strings/string_utils.h"
 #include "replay_proxy.h"
 
-static const uint32_t RemoteServerProtocolVersion = 2;
+static const uint32_t RemoteServerProtocolVersion = 3;
 
 enum RemoteServerPacket
 {
@@ -61,6 +61,7 @@ enum RemoteServerPacket
   eRemoteServer_ListDir,
   eRemoteServer_ExecuteAndInject,
   eRemoteServer_ShutdownServer,
+  eRemoteServer_GetSectionCount,
   eRemoteServer_FindSectionByName,
   eRemoteServer_FindSectionByType,
   eRemoteServer_GetSectionProperties,
@@ -559,6 +560,18 @@ static void ActiveRemoteClientThread(ClientThread *threadData)
         SERIALISE_ELEMENT(StackFrames);
       }
     }
+    else if(type == eRemoteServer_GetSectionCount)
+    {
+      reader.EndChunk();
+
+      int count = rdc ? rdc->NumSections() : 0;
+
+      {
+        WRITE_DATA_SCOPE();
+        SCOPED_SERIALISE_CHUNK(eRemoteServer_GetSectionCount);
+        SERIALISE_ELEMENT(count);
+      }
+    }
     else if(type == eRemoteServer_FindSectionByName)
     {
       std::string name;
@@ -1408,6 +1421,37 @@ public:
     rend->Shutdown();
   }
 
+  int GetSectionCount()
+  {
+    if(!Connected())
+      return 0;
+
+    {
+      WRITE_DATA_SCOPE();
+      SCOPED_SERIALISE_CHUNK(eRemoteServer_GetSectionCount);
+    }
+
+    int count = 0;
+
+    {
+      READ_DATA_SCOPE();
+      RemoteServerPacket type = ser.ReadChunk<RemoteServerPacket>();
+
+      if(type == eRemoteServer_GetSectionCount)
+      {
+        SERIALISE_ELEMENT(count);
+      }
+      else
+      {
+        RDCERR("Unexpected response to GetSectionCount");
+      }
+
+      ser.EndChunk();
+    }
+
+    return count;
+  }
+
   int FindSectionByName(const char *name)
   {
     if(!Connected())

renderdoc/replay/capture_file.cpp

@@ -165,6 +165,7 @@ public:
 
   // ICaptureAccess
 
+  int GetSectionCount();
   int FindSectionByName(const char *name);
   int FindSectionByType(SectionType type);
   SectionProperties GetSectionProperties(int index);
@@ -603,6 +604,14 @@ Thumbnail CaptureFile::GetThumbnail(FileType type, uint32_t maxsize)
   return ret;
 }
 
+int CaptureFile::GetSectionCount()
+{
+  if(!m_RDC)
+    return 0;
+
+  return m_RDC->NumSections();
+}
+
 int CaptureFile::FindSectionByName(const char *name)
 {
   if(!m_RDC)