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, 40 insertions, 0 deletions

diff --git a/tools/gfx/d3d12/d3d12-command-encoder.h b/tools/gfx/d3d12/d3d12-command-encoder.h
index bf2f7710b..5dd9909f8 100644
--- a/tools/gfx/d3d12/d3d12-command-encoder.h
+++ b/tools/gfx/d3d12/d3d12-command-encoder.h
@@ -52,6 +52,25 @@ class ResourceCommandEncoderImpl
     , public PipelineCommandEncoder
 {
 public:
+    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)
+    {
+        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 copyBuffer(
         IBufferResource* dst,
         Offset dstOffset,
@@ -138,6 +157,13 @@ class ComputeCommandEncoderImpl
 {
 public:
     SLANG_GFX_FORWARD_RESOURCE_COMMAND_ENCODER_IMPL(ResourceCommandEncoderImpl)
+    virtual void* getInterface(SlangUUID const& uuid) override
+    {
+        if (uuid == GfxGUID::IID_IComputeCommandEncoder || uuid == GfxGUID::IID_IResourceCommandEncoder || uuid == ISlangUnknown::getTypeGuid())
+            return this;
+        return nullptr;
+    }
+
 public:
     virtual SLANG_NO_THROW void SLANG_MCALL endEncoding() override;
     void init(
@@ -169,6 +195,13 @@ class RenderCommandEncoderImpl
 {
 public:
     SLANG_GFX_FORWARD_RESOURCE_COMMAND_ENCODER_IMPL(ResourceCommandEncoderImpl)
+    virtual void* getInterface(SlangUUID const& uuid) override
+    {
+        if (uuid == GfxGUID::IID_IRenderCommandEncoder || uuid == GfxGUID::IID_IResourceCommandEncoder || uuid == ISlangUnknown::getTypeGuid())
+            return this;
+        return nullptr;
+    }
+
 public:
     RefPtr<RenderPassLayoutImpl> m_renderPass;
     RefPtr<FramebufferImpl> m_framebuffer;
@@ -266,6 +299,13 @@ class RayTracingCommandEncoderImpl
 {
 public:
     SLANG_GFX_FORWARD_RESOURCE_COMMAND_ENCODER_IMPL(ResourceCommandEncoderImpl)
+    virtual void* getInterface(SlangUUID const& uuid) override
+    {
+        if (uuid == GfxGUID::IID_IRayTracingCommandEncoder || uuid == GfxGUID::IID_IResourceCommandEncoder || uuid == ISlangUnknown::getTypeGuid())
+            return this;
+        return nullptr;
+    }
+
 public:
     virtual SLANG_NO_THROW void SLANG_MCALL buildAccelerationStructure(
         const IAccelerationStructure::BuildDesc& desc,