[gfx] metal backend skeleton (#4223)

* add metal-cpp submodule

* add metal-cpp cmake target

* gfx metal backend skeleton

* add premake support

* add foundation framework

* add metal-cpp include to premake

* update vs project file

---------

Co-authored-by: Simon Kallweit <skallweit@nvidia.com>
Co-authored-by: Jay Kwak <82421531+jkwak-work@users.noreply.github.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/tools/gfx/metal/metal-texture.cpp b/tools/gfx/metal/metal-texture.cpp
new file mode 100644
index 000000000..092a028b0
--- /dev/null
+++ b/tools/gfx/metal/metal-texture.cpp
@@ -0,0 +1,39 @@
+// metal-texture.cpp
+#include "metal-texture.h"
+
+namespace gfx
+{
+
+using namespace Slang;
+
+namespace metal
+{
+
+TextureResourceImpl::TextureResourceImpl(const Desc& desc, DeviceImpl* device)
+    : Parent(desc)
+    , m_device(device)
+{}
+
+TextureResourceImpl::~TextureResourceImpl()
+{
+}
+
+Result TextureResourceImpl::getNativeResourceHandle(InteropHandle* outHandle)
+{
+    outHandle->api = InteropHandleAPI::Metal;
+    outHandle->handleValue = reinterpret_cast<intptr_t>(m_texture);
+    return SLANG_OK;
+}
+
+Result TextureResourceImpl::getSharedHandle(InteropHandle* outHandle)
+{
+    return SLANG_E_NOT_IMPLEMENTED;
+}
+
+Result TextureResourceImpl::setDebugName(const char* name)
+{
+    return SLANG_E_NOT_IMPLEMENTED;
+}
+
+} // namespace metal
+} // namespace gfx