From b87f3f51553198089c54be1c9068f682ae25b024 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Sun, 5 Aug 2018 18:45:24 +0200
Subject: [PATCH] [d3d11] Add common resource helper functions

---
 src/d3d11/d3d11_buffer.h     |  6 +++-
 src/d3d11/d3d11_resource.cpp | 53 ++++++++++++++++++++++++++++++
 src/d3d11/d3d11_resource.h   | 63 ++++++++++++++++++++++++++++++++++++
 src/d3d11/meson.build        |  1 +
 4 files changed, 122 insertions(+), 1 deletion(-)
 create mode 100644 src/d3d11/d3d11_resource.cpp
 create mode 100644 src/d3d11/d3d11_resource.h

diff --git a/src/d3d11/d3d11_buffer.h b/src/d3d11/d3d11_buffer.h
index db4cdd0f..f4e508dc 100644
--- a/src/d3d11/d3d11_buffer.h
+++ b/src/d3d11/d3d11_buffer.h
@@ -37,6 +37,10 @@ namespace dxvk {
     void STDMETHODCALLTYPE GetDesc(
             D3D11_BUFFER_DESC *pDesc) final;
     
+    const D3D11_BUFFER_DESC* Desc() const {
+      return &m_desc;
+    }
+    
     Rc<DxvkBuffer> GetBuffer() const {
       return m_buffer;
     }
@@ -64,7 +68,7 @@ namespace dxvk {
     void SetMappedSlice(const DxvkPhysicalBufferSlice& slice) {
       m_mappedSlice = slice;
     }
-    
+
   private:
     
     const Com<D3D11Device>      m_device;
diff --git a/src/d3d11/d3d11_resource.cpp b/src/d3d11/d3d11_resource.cpp
new file mode 100644
index 00000000..88002bd9
--- /dev/null
+++ b/src/d3d11/d3d11_resource.cpp
@@ -0,0 +1,53 @@
+#include "d3d11_resource.h"
+
+namespace dxvk {
+
+  HRESULT GetCommonResourceDesc(
+          ID3D11Resource*             pResource,
+          D3D11_COMMON_RESOURCE_DESC* pDesc) {
+    auto buffer   = GetCommonBuffer (pResource);
+    auto texture  = GetCommonTexture(pResource);
+
+    if (buffer != nullptr) {
+      pDesc->Usage          = buffer->Desc()->Usage;
+      pDesc->BindFlags      = buffer->Desc()->BindFlags;
+      pDesc->CPUAccessFlags = buffer->Desc()->CPUAccessFlags;
+      pDesc->MiscFlags      = buffer->Desc()->MiscFlags;
+      return S_OK;
+    } else if (texture != nullptr) {
+      pDesc->Usage          = texture->Desc()->Usage;
+      pDesc->BindFlags      = texture->Desc()->BindFlags;
+      pDesc->CPUAccessFlags = texture->Desc()->CPUAccessFlags;
+      pDesc->MiscFlags      = texture->Desc()->MiscFlags;
+      return S_OK;
+    } else {
+      pDesc->Usage          = D3D11_USAGE_DEFAULT;
+      pDesc->BindFlags      = 0;
+      pDesc->CPUAccessFlags = 0;
+      pDesc->MiscFlags      = 0;
+      return E_INVALIDARG;
+    }
+  }
+
+
+  BOOL CheckResourceBindFlags(
+          ID3D11Resource*             pResource,
+          UINT                        BindFlags) {
+    D3D11_COMMON_RESOURCE_DESC desc;
+    GetCommonResourceDesc(pResource, &desc);
+
+    return (desc.BindFlags & BindFlags) == BindFlags;
+  }
+
+
+  BOOL CheckResourceViewFormatCompatibility(
+          ID3D11Resource*             pResource,
+          DXGI_FORMAT                 Format) {
+    auto texture = GetCommonTexture(pResource);
+    
+    return texture != nullptr
+      ? texture->CheckViewFormatCompatibility(Format)
+      : true; /* for buffers */
+  }
+
+}
\ No newline at end of file
diff --git a/src/d3d11/d3d11_resource.h b/src/d3d11/d3d11_resource.h
new file mode 100644
index 00000000..5f93590a
--- /dev/null
+++ b/src/d3d11/d3d11_resource.h
@@ -0,0 +1,63 @@
+#pragma once
+
+#include "d3d11_buffer.h"
+#include "d3d11_texture.h"
+
+namespace dxvk {
+
+  /**
+   * \brief Common resource description
+   * 
+   * Stores the usage and bind flags of a resource
+   * Can be used to quickly determine whether it is
+   * legal to create a view for a given resource.
+   */
+  struct D3D11_COMMON_RESOURCE_DESC {
+    D3D11_USAGE       Usage;
+    UINT              BindFlags;
+    UINT              CPUAccessFlags;
+    UINT              MiscFlags;
+  };
+
+
+  /**
+   * \brief Queries common resource description
+   * 
+   * \param [in] pResource The resource to query
+   * \param [out] pDesc Resource description
+   * \returns \c S_OK on success, or \c E_INVALIDARG
+   */
+  HRESULT GetCommonResourceDesc(
+          ID3D11Resource*             pResource,
+          D3D11_COMMON_RESOURCE_DESC* pDesc);
+  
+  /**
+   * \brief Checks whether a resource has the given bind flags
+   * 
+   * Convenience method that checks whether a resource
+   * was created with \c all the specified bind flags
+   * set. Can be used to check whether a specific type
+   * of view can be created for this resource.
+   * \param [in] pResource The resource to check
+   * \param [in] BindFlags Bind flags to check
+   * \returns \c true if the resource supports the flags
+   */
+  BOOL CheckResourceBindFlags(
+          ID3D11Resource*             pResource,
+          UINT                        BindFlags);
+  
+  /**
+   * \brief Checks whether a format can be used to view a resource
+   * 
+   * Depending on whether the resource is a buffer or a
+   * texture, certain restrictions apply on which formats
+   * can be used to view the resource.
+   * \param [in] pResource The resource to check
+   * \param [in] Format The desired view format
+   * \returns \c true if the format is compatible
+   */
+  BOOL CheckResourceViewFormatCompatibility(
+          ID3D11Resource*             pResource,
+          DXGI_FORMAT                 Format);
+
+}
\ No newline at end of file
diff --git a/src/d3d11/meson.build b/src/d3d11/meson.build
index db007a57..3efc6e44 100644
--- a/src/d3d11/meson.build
+++ b/src/d3d11/meson.build
@@ -18,6 +18,7 @@ d3d11_src = [
   'd3d11_present.cpp',
   'd3d11_query.cpp',
   'd3d11_rasterizer.cpp',
+  'd3d11_resource.cpp',
   'd3d11_sampler.cpp',
   'd3d11_shader.cpp',
   'd3d11_state.cpp',