1 files changed, 129 insertions, 0 deletions
diff --git a/src/InputNormalInfo.h b/src/InputNormalInfo.h
new file mode 100644
index 0000000..28dcf87
--- /dev/null
+++ b/src/InputNormalInfo.h
@@ -0,0 +1,129 @@
+/* 
+* Copyright (c) 2008-2016, NVIDIA CORPORATION. All rights reserved. 
+* 
+* NVIDIA CORPORATION and its licensors retain all intellectual property 
+* and proprietary rights in and to this software, related documentation 
+* and any modifications thereto. Any use, reproduction, disclosure or 
+* distribution of this software and related documentation without an express 
+* license agreement from NVIDIA CORPORATION is strictly prohibited. 
+*/
+
+#pragma once
+#include "Common.h"
+#include "MatrixView.h"
+#include "TextureUtil.h"
+#include "UserTexture.h"
+
+namespace GFSDK
+{
+namespace SSAO
+{
+
+//--------------------------------------------------------------------------------
+class WorldToViewMatrix
+{
+public:
+    static bool IsValid(const GFSDK_SSAO_Matrix& WorldToViewMatrix)
+    {
+        MatrixView m(WorldToViewMatrix);
+
+        // Necessary condition for the matrix to be a valid LookAt matrix
+        // Note: the matrix may contain a uniform scaling, so we do not check m(3,3)
+        return (m(0,3) == 0.f &&
+                m(1,3) == 0.f &&
+                m(2,3) == 0.f);
+    }
+};
+
+//--------------------------------------------------------------------------------
+#if SUPPORT_D3D11
+namespace D3D11
+{
+
+struct InputNormalInfo
+{
+    GFSDK_SSAO_Status SetData(const GFSDK_SSAO_InputNormalData_D3D11& NormalData)
+    {
+        if (!NormalData.pFullResNormalTextureSRV)
+        {
+            return GFSDK_SSAO_NULL_ARGUMENT;
+        }
+
+        if (!GFSDK::SSAO::WorldToViewMatrix::IsValid(NormalData.WorldToViewMatrix))
+        {
+            return GFSDK_SSAO_INVALID_WORLD_TO_VIEW_MATRIX;
+        }
+
+        Texture.Init(NormalData.pFullResNormalTextureSRV);
+
+        return GFSDK_SSAO_OK;
+    }
+
+    SSAO::D3D11::UserTextureSRV Texture;
+};
+
+} // namespace D3D11
+#endif
+
+//--------------------------------------------------------------------------------
+#if SUPPORT_D3D12
+namespace D3D12
+{
+
+struct InputNormalInfo
+{
+    GFSDK_SSAO_Status SetData(const GFSDK_SSAO_InputNormalData_D3D12& NormalData)
+    {
+        if (!NormalData.FullResNormalTextureSRV.pResource)
+        {
+            return GFSDK_SSAO_NULL_ARGUMENT;
+        }
+
+        if (!GFSDK::SSAO::WorldToViewMatrix::IsValid(NormalData.WorldToViewMatrix))
+        {
+            return GFSDK_SSAO_INVALID_WORLD_TO_VIEW_MATRIX;
+        }
+
+        Texture.Init(&NormalData.FullResNormalTextureSRV);
+
+        return GFSDK_SSAO_OK;
+    }
+
+    SSAO::D3D12::UserTextureSRV Texture;
+};
+
+} // namespace D3D12
+#endif
+
+//--------------------------------------------------------------------------------
+#if SUPPORT_GL
+namespace GL
+{
+
+struct InputNormalInfo
+{
+    GFSDK_SSAO_Status SetData(const GFSDK_SSAO_GLFunctions& GL, const GFSDK_SSAO_InputNormalData_GL& NormalData)
+    {
+        if (!GFSDK::SSAO::GL::TextureUtil::HasValidTextureTarget(NormalData.FullResNormalTexture))
+        {
+            return GFSDK_SSAO_GL_INVALID_TEXTURE_TARGET;
+        }
+
+        if (!GFSDK::SSAO::WorldToViewMatrix::IsValid(NormalData.WorldToViewMatrix))
+        {
+            return GFSDK_SSAO_INVALID_WORLD_TO_VIEW_MATRIX;
+        }
+
+        Texture.Init(GL, NormalData.FullResNormalTexture);
+
+        return GFSDK_SSAO_OK;
+    }
+
+    SSAO::GL::UserTexture Texture;
+};
+
+} // namespace GL
+#endif // SUPPORT_GL
+
+} // namespace SSAO
+} // namespace GFSDK