Added DRAW_COMMAND_CAP_FLAG_BASE_VERTEX flag

Author: MikhailGorobets

Graphics/GraphicsEngine/interface/GraphicsTypes.h

@@ -2537,21 +2537,24 @@ DILIGENT_TYPED_ENUM(DRAW_COMMAND_CAP_FLAGS, Uint16)
     /// No draw command capabilities.
     DRAW_COMMAND_CAP_FLAG_NONE                         = 0,
 
+    /// Indicates that device supports non-zero base vertex for IDeviceContext::DrawIndexed().
+    DRAW_COMMAND_CAP_FLAG_BASE_VERTEX                  = 1u << 0,
+
     /// Indicates that device supports indirect draw/dispatch commands.
-    DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT                = 1u << 0,
+    DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT                = 1u << 1,
 
     /// Indicates that FirstInstanceLocation of the indirect draw command can be greater than zero.
-    DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT_FIRST_INSTANCE = 1u << 1,
+    DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT_FIRST_INSTANCE = 1u << 2,
 
     /// Indicates that device natively supports indirect draw commands with DrawCount > 1.
     /// When this flag is not set, the commands will be emulated on the host, which will
     /// produce correct results, but will be slower.
-    DRAW_COMMAND_CAP_FLAG_NATIVE_MULTI_DRAW_INDIRECT   = 1u << 2,
+    DRAW_COMMAND_CAP_FLAG_NATIVE_MULTI_DRAW_INDIRECT   = 1u << 3,
 
     /// Indicates that IDeviceContext::DrawIndirect() and IDeviceContext::DrawIndexedIndirect()
     /// commands may take non-null counter buffer. If this flag is not set, the number
     /// of draw commands must be specified through the command attributes.
-    DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT_COUNTER_BUFFER = 1u << 3
+    DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT_COUNTER_BUFFER = 1u << 4
 };
 DEFINE_FLAG_ENUM_OPERATORS(DRAW_COMMAND_CAP_FLAGS);
 

Graphics/GraphicsEngineD3D11/src/EngineFactoryD3D11.cpp

@@ -505,6 +505,7 @@ GraphicsAdapterInfo EngineFactoryD3D11Impl::GetGraphicsAdapterInfo(void*
     // Draw command properties
     {
         auto& DrawCommandProps{AdapterInfo.DrawCommand};
+        DrawCommandProps.CapFlags |= DRAW_COMMAND_CAP_FLAG_BASE_VERTEX;
 #if D3D11_REQ_DRAWINDEXED_INDEX_COUNT_2_TO_EXP >= 32
         DrawCommandProps.MaxIndexValue = ~0u;
 #else

Graphics/GraphicsEngineD3D12/src/EngineFactoryD3D12.cpp

@@ -1065,6 +1065,7 @@ GraphicsAdapterInfo EngineFactoryD3D12Impl::GetGraphicsAdapterInfo(void*
         DrawCommandProps.MaxIndexValue = 1u << D3D12_REQ_DRAWINDEXED_INDEX_COUNT_2_TO_EXP;
 #endif
         DrawCommandProps.CapFlags |=
+            DRAW_COMMAND_CAP_FLAG_BASE_VERTEX |
             DRAW_COMMAND_CAP_FLAG_NATIVE_MULTI_DRAW_INDIRECT |
             DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT_COUNTER_BUFFER;
 #if defined(_MSC_VER) && defined(_WIN64)

Graphics/GraphicsEngineOpenGL/src/RenderDeviceGLImpl.cpp

@@ -938,7 +938,7 @@ void RenderDeviceGLImpl::InitAdapterInfo()
         DrawCommandProps.CapFlags             = DRAW_COMMAND_CAP_FLAG_NONE;
         if (m_DeviceInfo.Type == RENDER_DEVICE_TYPE_GL)
         {
-            DrawCommandProps.CapFlags |= DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT;
+            DrawCommandProps.CapFlags |= DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT | DRAW_COMMAND_CAP_FLAG_BASE_VERTEX;
 
             // The baseInstance member of the DrawElementsIndirectCommand structure is defined only if the GL version is 4.2 or greater.
             if (GLVersion >= Version{4, 2})
@@ -956,6 +956,9 @@ void RenderDeviceGLImpl::InitAdapterInfo()
             if (GLVersion >= Version{3, 1} || strstr(Extensions, "draw_indirect"))
                 DrawCommandProps.CapFlags |= DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT;
 
+            if (GLVersion >= Version{3, 2} || strstr(Extensions, "draw_elements_base_vertex"))
+                DrawCommandProps.CapFlags |= DRAW_COMMAND_CAP_FLAG_BASE_VERTEX;
+
             if (strstr(Extensions, "base_instance"))
                 DrawCommandProps.CapFlags |= DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT_FIRST_INSTANCE;
 

Graphics/GraphicsEngineVulkan/src/EngineFactoryVk.cpp

@@ -399,7 +399,7 @@ GraphicsAdapterInfo GetPhysicalDeviceGraphicsAdapterInfo(const VulkanUtilities::
         auto& DrawCommandProps{AdapterInfo.DrawCommand};
         DrawCommandProps.MaxIndexValue        = vkDeviceProps.limits.maxDrawIndexedIndexValue;
         DrawCommandProps.MaxDrawIndirectCount = vkDeviceProps.limits.maxDrawIndirectCount;
-        DrawCommandProps.CapFlags             = DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT;
+        DrawCommandProps.CapFlags             = DRAW_COMMAND_CAP_FLAG_DRAW_INDIRECT | DRAW_COMMAND_CAP_FLAG_BASE_VERTEX;
         if (vkFeatures.multiDrawIndirect != VK_FALSE || vkExtFeatures.DrawIndirectCount)
             DrawCommandProps.CapFlags |= DRAW_COMMAND_CAP_FLAG_NATIVE_MULTI_DRAW_INDIRECT;
         if (vkFeatures.drawIndirectFirstInstance != VK_FALSE)