Merge pull request #1657 from Tinob/master

Add HW bounding Box support to d3d backend

1 files changed, 86 insertions, 0 deletions

diff --git a/Source/Core/VideoBackends/D3D/BoundingBox.cpp b/Source/Core/VideoBackends/D3D/BoundingBox.cpp
new file mode 100644
index 0000000000..564a84a276
--- /dev/null
+++ b/Source/Core/VideoBackends/D3D/BoundingBox.cpp
@@ -0,0 +1,86 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "VideoBackends/D3D/BoundingBox.h"
+
+#include "VideoCommon/VideoConfig.h"
+
+namespace DX11
+{
+
+static ID3D11Buffer* s_bbox_buffer;
+static ID3D11Buffer* s_bbox_staging_buffer;
+static ID3D11UnorderedAccessView*  s_bbox_uav;
+
+ID3D11UnorderedAccessView* &BBox::GetUAV()
+{
+	return s_bbox_uav;
+}
+
+void BBox::Init()
+{
+	if (g_ActiveConfig.backend_info.bSupportsBBox)
+	{
+		// Create 2 buffers here.
+		// First for unordered access on default pool.
+		auto desc = CD3D11_BUFFER_DESC(4 * sizeof(s32), D3D11_BIND_UNORDERED_ACCESS, D3D11_USAGE_DEFAULT, 0, 0, 4);
+		int initial_values[4] = { 0, 0, 0, 0 };
+		D3D11_SUBRESOURCE_DATA data;
+		data.pSysMem = initial_values;
+		data.SysMemPitch = 4 * sizeof(s32);
+		data.SysMemSlicePitch = 0;
+		HRESULT hr;
+		hr = D3D::device->CreateBuffer(&desc, &data, &s_bbox_buffer);
+		CHECK(SUCCEEDED(hr), "Create BoundingBox Buffer.");
+		D3D::SetDebugObjectName(s_bbox_buffer, "BoundingBox Buffer");
+
+		// Second to use as a staging buffer.
+		desc.Usage = D3D11_USAGE_STAGING;
+		desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
+		desc.BindFlags = 0;
+		hr = D3D::device->CreateBuffer(&desc, nullptr, &s_bbox_staging_buffer);
+		CHECK(SUCCEEDED(hr), "Create BoundingBox Staging Buffer.");
+		D3D::SetDebugObjectName(s_bbox_staging_buffer, "BoundingBox Staging Buffer");
+
+		// UAV is required to allow concurrent access.
+		D3D11_UNORDERED_ACCESS_VIEW_DESC UAVdesc = {};
+		UAVdesc.Format = DXGI_FORMAT_R32_SINT;
+		UAVdesc.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;
+		UAVdesc.Buffer.FirstElement = 0;
+		UAVdesc.Buffer.Flags = 0;
+		UAVdesc.Buffer.NumElements = 4;
+		hr = D3D::device->CreateUnorderedAccessView(s_bbox_buffer, &UAVdesc, &s_bbox_uav);
+		CHECK(SUCCEEDED(hr), "Create BoundingBox UAV.");
+		D3D::SetDebugObjectName(s_bbox_uav, "BoundingBox UAV");
+	}
+}
+
+void BBox::Shutdown()
+{
+	SAFE_RELEASE(s_bbox_buffer);
+	SAFE_RELEASE(s_bbox_staging_buffer);
+	SAFE_RELEASE(s_bbox_uav);
+}
+
+void BBox::Set(int index, int value)
+{
+	D3D11_BOX box{ index * sizeof(s32), 0, 0, (index + 1) * sizeof(s32), 1, 1 };
+	D3D::context->UpdateSubresource(s_bbox_buffer, 0, &box, &value, 0, 0);
+}
+
+int BBox::Get(int index)
+{
+	int data = 0;
+	D3D::context->CopyResource(s_bbox_staging_buffer, s_bbox_buffer);
+	D3D11_MAPPED_SUBRESOURCE map;
+	HRESULT hr = D3D::context->Map(s_bbox_staging_buffer, 0, D3D11_MAP_READ, 0, &map);
+	if (SUCCEEDED(hr))
+	{
+		data = ((s32*)map.pData)[index];
+	}
+	D3D::context->Unmap(s_bbox_staging_buffer, 0);
+	return data;
+}
+
+};