Share graphics API layer between tests/examples (#603)

The `render-test` project has an in-progress graphics API abstraction layer, and it makes sense to share this code with our examples rather than write a bunch of redundant code between examples and tests.

Most of this change is just moving files from `tools/render-test/*` to a new library project at `tools/slang-graphics/`. The most complicated code change there is renaming from `render_test` to `slang_graphics`.

The existing `hello` example was ported to use the graphics API layer instead of raw D3D11 API calls. It is still hard-coded to use the D3D11 back-end and the `SLANG_DXBC` target, so more work is needed if we want to actually support multiple APIs in the examples.

I also went ahead and implemented an extremely rudimentary set of APIs to abstract over the Windows platform calls that were being made in the example, so that we could potentially run that same example on other platforms. I did *not* port `render-test` to use those APIs, and I also did not implement them for anything but Windows (my assumption is that for most other platforms we would just use SDL2, and require people to ensure it is installed to their machine before building Slang examples).

1 files changed, 0 insertions, 214 deletions

diff --git a/tools/render-test/resource-d3d12.cpp b/tools/render-test/resource-d3d12.cpp
deleted file mode 100644
index 160c7f898..000000000
--- a/tools/render-test/resource-d3d12.cpp
+++ /dev/null
@@ -1,214 +0,0 @@
-// resource-d3d12.cpp
-#include "resource-d3d12.h"
-
-namespace renderer_test {
-using namespace Slang;
-
-/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! D3D12BarrierSubmitter !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
-
-void D3D12BarrierSubmitter::_flush()
-{
-	assert(m_numBarriers > 0);
-
-	if (m_commandList)
-	{
-		m_commandList->ResourceBarrier(UINT(m_numBarriers), m_barriers);
-	}
-	m_numBarriers = 0;
-}
-
-D3D12_RESOURCE_BARRIER& D3D12BarrierSubmitter::_expandOne()
-{
-	_flush();
-	return m_barriers[m_numBarriers++];
-}
-
-void D3D12BarrierSubmitter::transition(ID3D12Resource* resource, D3D12_RESOURCE_STATES prevState, D3D12_RESOURCE_STATES nextState)
-{
-    if (nextState != prevState)
-    {
-        D3D12_RESOURCE_BARRIER& barrier = expandOne();
-
-        const UINT subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
-        const D3D12_RESOURCE_BARRIER_FLAGS flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
-
-        ::memset(&barrier, 0, sizeof(barrier));
-        barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
-        barrier.Flags = flags;
-        barrier.Transition.pResource = resource;
-        barrier.Transition.StateBefore = prevState;
-        barrier.Transition.StateAfter = nextState;
-        barrier.Transition.Subresource = subresource;
-    }
-    else
-    {
-        if (nextState == D3D12_RESOURCE_STATE_UNORDERED_ACCESS)
-        {
-            D3D12_RESOURCE_BARRIER& barrier = expandOne();
-
-            ::memset(&barrier, 0, sizeof(barrier));
-            barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_UAV;
-            barrier.UAV.pResource = resource;
-        }
-    }
-}
-
-/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! D3D12ResourceBase !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
-
-/* static */DXGI_FORMAT D3D12ResourceBase::calcFormat(D3DUtil::UsageType usage, ID3D12Resource* resource)
-{
-	return resource ? D3DUtil::calcFormat(usage, resource->GetDesc().Format) : DXGI_FORMAT_UNKNOWN;
-}
-
-void D3D12ResourceBase::transition(D3D12_RESOURCE_STATES nextState, D3D12BarrierSubmitter& submitter)
-{
-	// Transition only if there is a resource
-	if (m_resource)
-	{
-        submitter.transition(m_resource, m_state, nextState);
-        m_state = nextState;
-    }
-}
-
-/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! D3D12CounterFence !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
-
-D3D12CounterFence::~D3D12CounterFence()
-{
-	if (m_event)
-	{
-		CloseHandle(m_event);
-	}
-}
-
-Result D3D12CounterFence::init(ID3D12Device* device, uint64_t initialValue)
-{
-	m_currentValue = initialValue;
-
-	SLANG_RETURN_ON_FAIL(device->CreateFence(m_currentValue, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(m_fence.writeRef())));
-	// Create an event handle to use for frame synchronization.
-	m_event = ::CreateEvent(nullptr, FALSE, FALSE, nullptr);
-	if (m_event == nullptr)
-	{
-		Result res = HRESULT_FROM_WIN32(GetLastError());
-		return SLANG_FAILED(res) ? res : SLANG_FAIL;
-	}
-	return SLANG_OK;
-}
-
-UInt64 D3D12CounterFence::nextSignal(ID3D12CommandQueue* commandQueue)
-{
-	// Increment the fence value. Save on the frame - we'll know that frame is done when the fence value >= 
-	m_currentValue++;
-	// Schedule a Signal command in the queue.
-	Result res = commandQueue->Signal(m_fence, m_currentValue);
-	if (SLANG_FAILED(res))
-	{
-		assert(!"Signal failed");
-	}
-	return m_currentValue;
-}
-
-void D3D12CounterFence::waitUntilCompleted(uint64_t completedValue)
-{
-	// You can only wait for a value that is less than or equal to the current value
-	assert(completedValue <= m_currentValue);
-
-	// Wait until the previous frame is finished.
-	while (m_fence->GetCompletedValue() < completedValue)
-	{
-		// Make it signal with the current value
-		SLANG_ASSERT_VOID_ON_FAIL(m_fence->SetEventOnCompletion(completedValue, m_event));
-		WaitForSingleObject(m_event, INFINITE);
-	}
-}
-
-void D3D12CounterFence::nextSignalAndWait(ID3D12CommandQueue* commandQueue)
-{
-	waitUntilCompleted(nextSignal(commandQueue));
-}
-
-/* !!!!!!!!!!!!!!!!!!!!!!!!! D3D12Resource !!!!!!!!!!!!!!!!!!!!!!!! */
-
-/* static */void D3D12Resource::setDebugName(ID3D12Resource* resource, const char* name)
-{
-	if (resource)
-	{
-		size_t len = ::strlen(name);
-		List<wchar_t> buf;
-		buf.SetSize(len + 1);
-
-		D3DUtil::appendWideChars(name, buf);
-		resource->SetName(buf.begin());
-	}
-}
-
-void D3D12Resource::setDebugName(const char* name)
-{
-	setDebugName(m_resource, name);
-}
-
-void D3D12Resource::setDebugName(const wchar_t* name)
-{
-	if (m_resource)
-	{
-		m_resource->SetName(name);
-	}
-}
-
-void D3D12Resource::setResource(ID3D12Resource* resource, D3D12_RESOURCE_STATES initialState)
-{
-	if (resource != m_resource)
-	{
-		if (resource)
-		{
-			resource->AddRef();
-		}
-		if (m_resource)
-		{
-			m_resource->Release();
-		}
-		m_resource = resource;
-	}
-	m_prevState = initialState;
-	m_state = initialState;
-}
-
-void D3D12Resource::setResourceNull()
-{
-	if (m_resource)
-	{
-		m_resource->Release();
-		m_resource = nullptr;
-	}
-}
-
-Result D3D12Resource::initCommitted(ID3D12Device* device, const D3D12_HEAP_PROPERTIES& heapProps, D3D12_HEAP_FLAGS heapFlags, const D3D12_RESOURCE_DESC& resourceDesc, D3D12_RESOURCE_STATES initState, const D3D12_CLEAR_VALUE * clearValue)
-{
-	setResourceNull();
-	ComPtr<ID3D12Resource> resource;
-	SLANG_RETURN_ON_FAIL(device->CreateCommittedResource(&heapProps, heapFlags, &resourceDesc, initState, clearValue, IID_PPV_ARGS(resource.writeRef())));
-	setResource(resource, initState);
-	return SLANG_OK;
-}
-
-ID3D12Resource* D3D12Resource::detach()
-{
-	ID3D12Resource* resource = m_resource;
-	m_resource = nullptr;
-	return resource;
-}
-
-void D3D12Resource::swap(ComPtr<ID3D12Resource>& resourceInOut)
-{
-	ID3D12Resource* tmp = m_resource;
-	m_resource = resourceInOut.detach();
-	resourceInOut.attach(tmp);
-}
-
-void D3D12Resource::setState(D3D12_RESOURCE_STATES state)
-{
-	m_prevState = state;
-	m_state = state;
-}
-
-} // renderer_test