Implemented staging textures in D3D12 back-end

1 files changed, 15 insertions, 0 deletions

diff --git a/Graphics/GraphicsEngine/src/Texture.cpp b/Graphics/GraphicsEngine/src/Texture.cpp
index 8054ae5f..d33701ea 100644
--- a/Graphics/GraphicsEngine/src/Texture.cpp
+++ b/Graphics/GraphicsEngine/src/Texture.cpp
@@ -109,6 +109,21 @@ void ValidateTextureDesc( const TextureDesc& Desc )
                              "There might be an issue in OpenGL driver on NVidia hardware: when rendering to SNORM textures, all negative values are clamped to zero.\n"
                              "Use UNORM format instead." );
     }
+
+    if (Desc.Usage == USAGE_STAGING)
+    {
+        if (Desc.BindFlags != 0)
+            LOG_TEXTURE_ERROR_AND_THROW("Staging textures cannot be bound to any GPU pipeline stage");
+
+        if (Desc.MiscFlags & MISC_TEXTURE_FLAG_GENERATE_MIPS)
+            LOG_TEXTURE_ERROR_AND_THROW("Mipmaps cannot be autogenerated for staging textures");
+
+        if (Desc.CPUAccessFlags == 0)
+            LOG_TEXTURE_ERROR_AND_THROW("Staging textures must specify CPU access flags");
+
+        if ( (Desc.CPUAccessFlags & (CPU_ACCESS_READ | CPU_ACCESS_WRITE)) == (CPU_ACCESS_READ | CPU_ACCESS_WRITE))
+            LOG_TEXTURE_ERROR_AND_THROW("Staging textures must use exactly one of ACESS_READ or ACCESS_WRITE flags");
+    }
 }