1 files changed, 173 insertions, 0 deletions

diff --git a/dxg/src/dxcommon.c b/dxg/src/dxcommon.c
new file mode 100644
index 0000000..ecc9a88
--- /dev/null
+++ b/dxg/src/dxcommon.c
@@ -0,0 +1,173 @@
+#include <dxg/dxcommon.h>
+
+// Required so that D3D12.dll can find and load D3D12Core.dll and other DLLs
+// from the Agility SDK. The macro comes from CMakeLists.txt.
+__declspec(dllexport) extern const UINT  D3D12SDKVersion = AGILITY_SDK_VERSION;
+__declspec(dllexport) extern const char* D3D12SDKPath    = AGILITY_SDK_INSTALL;
+D3D12_RESOURCE_BARRIER CD3DX12_RESOURCE_BARRIER_Transition(
+    ID3D12Resource*       pResource,
+    D3D12_RESOURCE_STATES stateBefore,
+    D3D12_RESOURCE_STATES stateAfter) {
+    return (D3D12_RESOURCE_BARRIER){
+        .Type                   = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION,
+        .Flags                  = D3D12_RESOURCE_BARRIER_FLAG_NONE,
+        .Transition.pResource   = pResource,
+        .Transition.StateBefore = stateBefore,
+        .Transition.StateAfter  = stateAfter,
+        .Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES};
+}
+
+D3D12_RASTERIZER_DESC CD3DX12_RASTERIZER_DESC_DEFAULT() {
+    return (D3D12_RASTERIZER_DESC){
+        .FillMode              = D3D12_FILL_MODE_SOLID,
+        .CullMode              = D3D12_CULL_MODE_BACK,
+        .FrontCounterClockwise = FALSE,
+        .DepthBias             = D3D12_DEFAULT_DEPTH_BIAS,
+        .DepthBiasClamp        = D3D12_DEFAULT_DEPTH_BIAS_CLAMP,
+        .SlopeScaledDepthBias  = D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS,
+        .DepthClipEnable       = TRUE,
+        .MultisampleEnable     = FALSE,
+        .AntialiasedLineEnable = FALSE,
+        .ForcedSampleCount     = 0,
+        .ConservativeRaster    = D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF};
+}
+
+D3D12_BLEND_DESC CD3DX12_BLEND_DESC_DEFAULT() {
+    const D3D12_RENDER_TARGET_BLEND_DESC defaultRenderTargetBlendDesc = {
+        FALSE, FALSE,
+        D3D12_BLEND_ONE, D3D12_BLEND_ZERO, D3D12_BLEND_OP_ADD,
+        D3D12_BLEND_ONE, D3D12_BLEND_ZERO, D3D12_BLEND_OP_ADD,
+        D3D12_LOGIC_OP_NOOP,
+        D3D12_COLOR_WRITE_ENABLE_ALL,
+    };
+    D3D12_BLEND_DESC desc = {
+        .AlphaToCoverageEnable  = FALSE,
+        .IndependentBlendEnable = FALSE,
+    };
+    for (UINT i = 0; i < D3D12_SIMULTANEOUS_RENDER_TARGET_COUNT; ++i) {
+        desc.RenderTarget[i] = defaultRenderTargetBlendDesc;
+    }
+    return desc;
+}
+
+void dxg_wait(ID3D12Fence* pFence, HANDLE fenceEvent, UINT64 fenceValue) {
+    assert(pFence);
+    // Wait for commands to finish execution.
+    // It is possible that execution has already finished by the time we
+    // get here, so first check the fence's completed value.
+    if (pFence->lpVtbl->GetCompletedValue(pFence) < fenceValue) {
+        // GPU Signal still pending. Configure a Windows event and wait for it.
+        // The event fires when the GPU signals.
+        //
+        // Indicate that the fence event is to be fired when the fence reaches
+        // the given fence value.
+        TrapIfFailed(pFence->lpVtbl->SetEventOnCompletion(pFence, fenceValue, fenceEvent));
+        // Will wake up when the fence takes on the given fence value.
+        WaitForSingleObject(fenceEvent, INFINITE);
+    }
+}
+
+// -----------------------------------------------------------------------------
+// Command Recorder
+// -----------------------------------------------------------------------------
+
+HRESULT dxg_cmdrec_init(CommandRecorder* pRec, ID3D12Device* pDevice) {
+    assert(pRec);
+    assert(pDevice);
+
+    HRESULT result = S_OK;
+
+    const D3D12_COMMAND_LIST_TYPE type = D3D12_COMMAND_LIST_TYPE_DIRECT;
+
+    if ((result = pDevice->lpVtbl->CreateCommandAllocator(
+        pDevice, type, &IID_ID3D12CommandAllocator, &pRec->pCmdAllocator)) != S_OK) {
+        return result;
+    }
+
+    if ((result = pDevice->lpVtbl->CreateCommandList(
+        pDevice, 0, type, pRec->pCmdAllocator, NULL, &IID_ID3D12CommandList, &pRec->pCmdList)) != S_OK) {
+        return result;
+    }
+
+    // Command lists start open. Close it for API convenience.
+    if ((result = pRec->pCmdList->lpVtbl->Close(pRec->pCmdList)) != S_OK) {
+        return result;
+    }
+
+    return result;
+}
+
+void dxg_cmdrec_destroy(CommandRecorder* pRec) {
+    assert(pRec);
+    SafeRelease(pRec->pCmdList);
+    SafeRelease(pRec->pCmdAllocator);
+}
+
+HRESULT dxg_cmdrec_reset(CommandRecorder* pRec) {
+    assert(pRec);
+    assert(pRec->pCmdAllocator);
+    assert(pRec->pCmdList);
+    HRESULT result = S_OK;
+    if ((result = pRec->pCmdAllocator->lpVtbl->Reset(pRec->pCmdAllocator)) != S_OK) {
+        return result;
+    }
+    if ((result = pRec->pCmdList->lpVtbl->Reset(pRec->pCmdList, pRec->pCmdAllocator, NULL)) != S_OK) {
+        return result;
+    }
+    return result;
+}
+
+// -----------------------------------------------------------------------------
+// Upload Buffer
+// -----------------------------------------------------------------------------
+
+void dxg_upload_buffer_init(UploadBuffer* pBuf, ID3D12Device* pDevice, size_t size) {
+    assert(pBuf);
+    assert(pDevice);
+
+    pBuf->size = size;
+
+    const D3D12_HEAP_PROPERTIES props = {
+        .Type                 = D3D12_HEAP_TYPE_UPLOAD,
+        .CPUPageProperty      = D3D12_CPU_PAGE_PROPERTY_WRITE_COMBINE,
+        .MemoryPoolPreference = D3D12_MEMORY_POOL_L0,
+        .CreationNodeMask     = 0,
+        .VisibleNodeMask      = 0
+    };
+    // Constant buffers need to be aligned to 256 bytes. Other types of buffers
+    // do not have this requirement. To make the upload buffer general, use the
+    // worst-case alignment.
+    const D3D12_RESOURCE_DESC desc = {
+        .Dimension        = D3D12_RESOURCE_DIMENSION_BUFFER,
+        .Alignment        = 256,
+        .Width            = size,
+        .Height           = 0,
+        .DepthOrArraySize = 0,
+        .MipLevels        = 0,
+        .Format           = DXGI_FORMAT_UNKNOWN,
+        .SampleDesc       = (DXGI_SAMPLE_DESC){0},
+        .Layout           = D3D12_TEXTURE_LAYOUT_UNKNOWN,
+        .Flags            = D3D12_RESOURCE_FLAG_NONE
+    };
+    TrapIfFailed(pDevice->lpVtbl->CreateCommittedResource(
+        pDevice,
+        &props,
+        D3D12_HEAP_FLAG_NONE,
+        &desc,
+        D3D12_RESOURCE_STATE_COPY_SOURCE,
+        NULL,
+        &IID_ID3D12Resource,
+        &pBuf->pUploadBuffer));
+}
+
+void dxg_upload_buffer_destroy(UploadBuffer* pBuf, ID3D12Device* pDevice) {
+    assert(pDevice);
+    assert(pBuf);
+    SafeRelease(pBuf->pUploadBuffer);
+}
+
+void dxg_upload_buffer_load(UploadBuffer* pBuf, const void* pData, size_t bytes, ID3D12Resource* pDstBuffer) {
+    assert(pBuf);
+    assert(pData);
+    assert(pDstBuffer);
+}