Add gfx interface definition in Slang. (#2364)

* Add gfx interface definition in Slang.

- add gfx interface definitons in Slang.
- fix slang compiler to correctly type-check `out` interface argument.
- modify gfx interface to be fully COM compatible
- add convenient ShaderProgram creation methods to gfx.

* Fix compile errors and warnings.

* Update project files

* Fix cuda.

* Properly implement queryInterface in command encoder impls.

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/tools/gfx/immediate-renderer-base.cpp b/tools/gfx/immediate-renderer-base.cpp
index 611741c46..57cb7f934 100644
--- a/tools/gfx/immediate-renderer-base.cpp
+++ b/tools/gfx/immediate-renderer-base.cpp
@@ -60,6 +60,27 @@ public:
             m_commandBuffer = cmdBuffer;
         }
 
+        virtual void* getInterface(SlangUUID const& uuid)
+        {
+            if (uuid == GfxGUID::IID_IResourceCommandEncoder || uuid == ISlangUnknown::getTypeGuid())
+            {
+                return this;
+            }
+            return nullptr;
+        }
+        virtual SLANG_NO_THROW SlangResult SLANG_MCALL
+            queryInterface(SlangUUID const& uuid, void** outObject) override
+        {
+            if (auto ptr = getInterface(uuid))
+            {
+                *outObject = ptr;
+                return SLANG_OK;
+            }
+            return SLANG_E_NO_INTERFACE;
+        }
+        virtual SLANG_NO_THROW uint32_t SLANG_MCALL addRef() { return 1; }
+        virtual SLANG_NO_THROW uint32_t SLANG_MCALL release() { return 1; }
+
         virtual SLANG_NO_THROW void SLANG_MCALL endEncoding() override {}
         virtual SLANG_NO_THROW void SLANG_MCALL copyBuffer(
             IBufferResource* dst,
@@ -242,6 +263,14 @@ public:
     {
     public:
         SLANG_GFX_FORWARD_RESOURCE_COMMAND_ENCODER_IMPL(ResourceCommandEncoderImpl)
+        virtual void* getInterface(SlangUUID const& uuid) override
+        {
+            if (uuid == GfxGUID::IID_IResourceCommandEncoder || uuid == GfxGUID::IID_IRenderCommandEncoder || uuid == ISlangUnknown::getTypeGuid())
+            {
+                return this;
+            }
+            return nullptr;
+        }
     public:
         virtual SLANG_NO_THROW void SLANG_MCALL endEncoding() override {}
 
@@ -432,6 +461,14 @@ public:
     {
     public:
         SLANG_GFX_FORWARD_RESOURCE_COMMAND_ENCODER_IMPL(ResourceCommandEncoderImpl)
+        virtual void* getInterface(SlangUUID const& uuid) override
+        {
+            if (uuid == GfxGUID::IID_IResourceCommandEncoder || uuid == GfxGUID::IID_IComputeCommandEncoder || uuid == ISlangUnknown::getTypeGuid())
+            {
+                return this;
+            }
+            return nullptr;
+        }
     public:
         virtual SLANG_NO_THROW void SLANG_MCALL endEncoding() override
         {