[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, 57 insertions, 0 deletions

diff --git a/tools/gfx/metal/metal-buffer.cpp b/tools/gfx/metal/metal-buffer.cpp
new file mode 100644
index 000000000..de866bcf7
--- /dev/null
+++ b/tools/gfx/metal/metal-buffer.cpp
@@ -0,0 +1,57 @@
+// metal-buffer.cpp
+#include "metal-buffer.h"
+
+namespace gfx
+{
+
+using namespace Slang;
+
+namespace metal
+{
+
+BufferResourceImpl::BufferResourceImpl(const IBufferResource::Desc& desc, DeviceImpl* renderer)
+    : Parent(desc)
+    , m_renderer(renderer)
+{
+    assert(renderer);
+}
+
+BufferResourceImpl::~BufferResourceImpl()
+{
+    if (sharedHandle.handleValue != 0)
+    {
+    }
+}
+
+DeviceAddress BufferResourceImpl::getDeviceAddress()
+{
+    return (DeviceAddress)0;
+}
+
+Result BufferResourceImpl::getNativeResourceHandle(InteropHandle* outHandle)
+{
+    return SLANG_E_NOT_IMPLEMENTED;
+}
+
+Result BufferResourceImpl::getSharedHandle(InteropHandle* outHandle)
+{
+    return SLANG_E_NOT_IMPLEMENTED;
+}
+
+Result BufferResourceImpl::map(MemoryRange* rangeToRead, void** outPointer)
+{
+    return SLANG_E_NOT_IMPLEMENTED;
+}
+
+Result BufferResourceImpl::unmap(MemoryRange* writtenRange)
+{
+    return SLANG_E_NOT_IMPLEMENTED;
+}
+
+Result BufferResourceImpl::setDebugName(const char* name)
+{
+    return SLANG_E_NOT_IMPLEMENTED;
+}
+
+} // namespace metal
+} // namespace gfx