D3D12: More optimal indirect command layout.

src/renderer_d3d12.cpp

@@ -3555,12 +3555,12 @@ data.NumQualityLevels = 0;
 
 		D3D12_INDIRECT_ARGUMENT_DESC drawArgDesc[] =
 		{
-			{ D3D12_INDIRECT_ARGUMENT_TYPE_CONSTANT_BUFFER_VIEW, { { Rdt::CBV } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 0        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 1        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 2        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 3        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 4        } } },
+			{ D3D12_INDIRECT_ARGUMENT_TYPE_CONSTANT_BUFFER_VIEW, { { Rdt::CBV } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_DRAW,                 { { 0        } } },
 		};
 
@@ -3580,13 +3580,13 @@ data.NumQualityLevels = 0;
 
 		D3D12_INDIRECT_ARGUMENT_DESC drawIndexedArgDesc[] =
 		{
-			{ D3D12_INDIRECT_ARGUMENT_TYPE_CONSTANT_BUFFER_VIEW, { { Rdt::CBV } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 0        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 1        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 2        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 3        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   { { 4        } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_INDEX_BUFFER_VIEW,    { { 0        } } },
+			{ D3D12_INDIRECT_ARGUMENT_TYPE_CONSTANT_BUFFER_VIEW, { { Rdt::CBV } } },
 			{ D3D12_INDIRECT_ARGUMENT_TYPE_DRAW_INDEXED,         { { 0        } } },
 		};
 

src/renderer_d3d12.h

@@ -419,16 +419,16 @@ namespace bgfx { namespace d3d12
 
 		struct DrawIndirectCommand
 		{
-			D3D12_GPU_VIRTUAL_ADDRESS cbv;
 			D3D12_VERTEX_BUFFER_VIEW vbv[BGFX_CONFIG_MAX_VERTEX_STREAMS+1];
+			D3D12_GPU_VIRTUAL_ADDRESS cbv;
 			D3D12_DRAW_ARGUMENTS draw;
 		};
 
 		struct DrawIndexedIndirectCommand
 		{
-			D3D12_GPU_VIRTUAL_ADDRESS cbv;
 			D3D12_VERTEX_BUFFER_VIEW vbv[BGFX_CONFIG_MAX_VERTEX_STREAMS+1];
 			D3D12_INDEX_BUFFER_VIEW ibv;
+			D3D12_GPU_VIRTUAL_ADDRESS cbv;
 			D3D12_DRAW_INDEXED_ARGUMENTS drawIndexed;
 		};