From cb837597c352273e506c816a340dc54520be45f9 Mon Sep 17 00:00:00 2001
From: assiduous <assiduous@diligentgraphics.com>
Date: Sun, 5 Jan 2020 20:32:20 -0800
Subject: Implemented queries in Vulkan (closed
 https://github.com/DiligentGraphics/DiligentCore/issues/25)

---
 Graphics/GraphicsEngine/include/DeviceContextBase.h |  6 ++++++
 Graphics/GraphicsEngine/interface/DeviceContext.h   |  2 +-
 Graphics/GraphicsEngine/interface/GraphicsTypes.h   | 12 +++++++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

(limited to 'Graphics/GraphicsEngine')

diff --git a/Graphics/GraphicsEngine/include/DeviceContextBase.h b/Graphics/GraphicsEngine/include/DeviceContextBase.h
index f7b94118..02e564af 100644
--- a/Graphics/GraphicsEngine/include/DeviceContextBase.h
+++ b/Graphics/GraphicsEngine/include/DeviceContextBase.h
@@ -910,6 +910,12 @@ inline bool DeviceContextBase<BaseInterface, ImplementationTraits>::BeginQuery(I
         return false;
     }
 
+    if (pQuery->GetDesc().Type == QUERY_TYPE_TIMESTAMP)
+    {
+        LOG_ERROR_MESSAGE("BeginQuery() is disabled for timestamp queries. Call EndQuery() to set the timestamp.");
+        return false;
+    }
+
     if (!ValidatedCast<QueryImplType>(pQuery)->OnBeginQuery(this))
         return false;
 
diff --git a/Graphics/GraphicsEngine/interface/DeviceContext.h b/Graphics/GraphicsEngine/interface/DeviceContext.h
index 628f88ea..f08e2128 100644
--- a/Graphics/GraphicsEngine/interface/DeviceContext.h
+++ b/Graphics/GraphicsEngine/interface/DeviceContext.h
@@ -1014,7 +1014,7 @@ public:
     ///
     /// \remarks    Only immediate context can begin a query.
     ///
-    /// \warning    OpenGL does not support nested queries of the same type.
+    /// \warning    OpenGL and Vulkan do not support nested queries of the same type.
     virtual void BeginQuery(IQuery* pQuery) = 0;
 
 
diff --git a/Graphics/GraphicsEngine/interface/GraphicsTypes.h b/Graphics/GraphicsEngine/interface/GraphicsTypes.h
index b5ce083c..561b8fd8 100644
--- a/Graphics/GraphicsEngine/interface/GraphicsTypes.h
+++ b/Graphics/GraphicsEngine/interface/GraphicsTypes.h
@@ -1462,7 +1462,7 @@ namespace Diligent
         /// global dynamic heap manager to avoid page creation at run time.
         Uint32 NumDynamicHeapPagesToReserve = 1;
 
-        /// The size of query pool for each query type.
+        /// Query pool size for each query type.
         Uint32 QueryPoolSizes[5] = 
         {
             0,   // Ignored
@@ -1594,6 +1594,16 @@ namespace Diligent
         /// Size of the memory chunk suballocated by immediate/deferred context from
         /// the global dynamic heap to perform lock-free dynamic suballocations
         Uint32 DynamicHeapPageSize = 256 << 10;
+
+        /// Query pool size for each query type.
+        Uint32 QueryPoolSizes[5] = 
+        {
+            0,   // Ignored
+            128, // QUERY_TYPE_OCCLUSION
+            128, // QUERY_TYPE_BINARY_OCCLUSION
+            512, // QUERY_TYPE_TIMESTAMP
+            128  // QUERY_TYPE_PIPELINE_STATISTICS
+        };
     };
 
 
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