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Backends: DirectX12: added helpers to switch to Linear sampler (yet not made public, but intended to be forward declared). (#9173)

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thedmd 2025-09-27 15:09:52 +02:00 • committed by ocornut
parent 12223cc3e9
commit b933599f00
1 changed files with 51 additions and 12 deletions
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63
backends/imgui_impl_dx12.cpp
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@ -93,8 +93,10 @@ struct ImGui_ImplDX12_Data
ImGui_ImplDX12_InitInfo InitInfo;
IDXGIFactory5* pdxgiFactory;
ID3D12Device* pd3dDevice;
ID3D12RootSignature* pRootSignature;
ID3D12PipelineState* pPipelineState;
ID3D12RootSignature* pRootSignatureLinear;
ID3D12RootSignature* pRootSignatureNearest;
ID3D12PipelineState* pPipelineStateLinear;
ID3D12PipelineState* pPipelineStateNearest;
ID3D12CommandQueue* pCommandQueue;
bool commandQueueOwned;
DXGI_FORMAT RTVFormat;
@ -140,11 +142,27 @@ struct VERTEX_CONSTANT_BUFFER_DX12
float mvp[4][4];
};
// FIXME-WIP: Allow user to forward declare those two, for until we come up with a backend agnostic API to do this. (#9173)
void ImGui_ImplDX12_SetupSamplerLinear(ID3D12GraphicsCommandList* command_list);
void ImGui_ImplDX12_SetupSamplerNearest(ID3D12GraphicsCommandList* command_list);
// Functions
static void ImGui_ImplDX12_SetupRenderState(ImDrawData* draw_data, ID3D12GraphicsCommandList* command_list, ImGui_ImplDX12_RenderBuffers* fr)
void ImGui_ImplDX12_SetupSamplerLinear(ID3D12GraphicsCommandList* command_list)
{
ImGui_ImplDX12_Data* bd = ImGui_ImplDX12_GetBackendData();
command_list->SetPipelineState(bd->pPipelineStateLinear);
command_list->SetGraphicsRootSignature(bd->pRootSignatureLinear);
}
void ImGui_ImplDX12_SetupSamplerNearest(ID3D12GraphicsCommandList* command_list)
{
ImGui_ImplDX12_Data* bd = ImGui_ImplDX12_GetBackendData();
command_list->SetPipelineState(bd->pPipelineStateNearest);
command_list->SetGraphicsRootSignature(bd->pRootSignatureNearest);
}
static void ImGui_ImplDX12_SetupRenderState(ImDrawData* draw_data, ID3D12GraphicsCommandList* command_list, ImGui_ImplDX12_RenderBuffers* fr)
{
// Setup orthographic projection matrix into our constant buffer
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right).
VERTEX_CONSTANT_BUFFER_DX12 vertex_constant_buffer;
@ -186,8 +204,7 @@ static void ImGui_ImplDX12_SetupRenderState(ImDrawData* draw_data, ID3D12Graphic
ibv.Format = sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT;
command_list->IASetIndexBuffer(&ibv);
command_list->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
command_list->SetPipelineState(bd->pPipelineState);
command_list->SetGraphicsRootSignature(bd->pRootSignature);
ImGui_ImplDX12_SetupSamplerLinear(command_list);
command_list->SetGraphicsRoot32BitConstants(0, 16, &vertex_constant_buffer, 0);
// Setup blend factor
@ -555,7 +572,7 @@ bool ImGui_ImplDX12_CreateDeviceObjects()
ImGui_ImplDX12_Data* bd = ImGui_ImplDX12_GetBackendData();
if (!bd || !bd->pd3dDevice)
return false;
if (bd->pPipelineState)
if (bd->pPipelineStateLinear)
ImGui_ImplDX12_InvalidateDeviceObjects();
HRESULT hr = ::CreateDXGIFactory1(IID_PPV_ARGS(&bd->pdxgiFactory));
@ -644,7 +661,15 @@ bool ImGui_ImplDX12_CreateDeviceObjects()
if (D3D12SerializeRootSignatureFn(&desc, D3D_ROOT_SIGNATURE_VERSION_1, &blob, nullptr) != S_OK)
return false;
bd->pd3dDevice->CreateRootSignature(0, blob->GetBufferPointer(), blob->GetBufferSize(), IID_PPV_ARGS(&bd->pRootSignature));
bd->pd3dDevice->CreateRootSignature(0, blob->GetBufferPointer(), blob->GetBufferSize(), IID_PPV_ARGS(&bd->pRootSignatureLinear));
blob->Release();
// Root Signature for ImDrawCallback_SetSamplerNearest
staticSampler[0].Filter = D3D12_FILTER_MIN_MAG_MIP_POINT;
if (D3D12SerializeRootSignatureFn(&desc, D3D_ROOT_SIGNATURE_VERSION_1, &blob, nullptr) != S_OK)
return false;
bd->pd3dDevice->CreateRootSignature(0, blob->GetBufferPointer(), blob->GetBufferSize(), IID_PPV_ARGS(&bd->pRootSignatureNearest));
blob->Release();
}
@ -657,7 +682,7 @@ bool ImGui_ImplDX12_CreateDeviceObjects()
D3D12_GRAPHICS_PIPELINE_STATE_DESC psoDesc = {};
psoDesc.NodeMask = 1;
psoDesc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;
psoDesc.pRootSignature = bd->pRootSignature;
psoDesc.pRootSignature = bd->pRootSignatureLinear;
psoDesc.SampleMask = UINT_MAX;
psoDesc.NumRenderTargets = 1;
psoDesc.RTVFormats[0] = bd->RTVFormat;
@ -780,7 +805,18 @@ bool ImGui_ImplDX12_CreateDeviceObjects()
desc.BackFace = desc.FrontFace;
}
HRESULT result_pipeline_state = bd->pd3dDevice->CreateGraphicsPipelineState(&psoDesc, IID_PPV_ARGS(&bd->pPipelineState));
HRESULT result_pipeline_state = bd->pd3dDevice->CreateGraphicsPipelineState(&psoDesc, IID_PPV_ARGS(&bd->pPipelineStateLinear));
if (result_pipeline_state != S_OK)
{
vertexShaderBlob->Release();
pixelShaderBlob->Release();
return false;
}
// Pipeline State for ImDrawCallback_SetSamplerNearest
psoDesc.pRootSignature = bd->pRootSignatureNearest;
result_pipeline_state = bd->pd3dDevice->CreateGraphicsPipelineState(&psoDesc, IID_PPV_ARGS(&bd->pPipelineStateNearest));
vertexShaderBlob->Release();
pixelShaderBlob->Release();
if (result_pipeline_state != S_OK)
@ -813,8 +849,11 @@ void ImGui_ImplDX12_InvalidateDeviceObjects()
if (bd->commandQueueOwned)
SafeRelease(bd->pCommandQueue);
bd->commandQueueOwned = false;
SafeRelease(bd->pRootSignature);
SafeRelease(bd->pPipelineState);
SafeRelease(bd->pRootSignatureLinear);
SafeRelease(bd->pRootSignatureNearest);
SafeRelease(bd->pPipelineStateLinear);
SafeRelease(bd->pPipelineStateNearest);
if (bd->pTexUploadBufferMapped)
{
D3D12_RANGE range = { 0, bd->pTexUploadBufferSize };
@ -961,7 +1000,7 @@ void ImGui_ImplDX12_NewFrame()
ImGui_ImplDX12_Data* bd = ImGui_ImplDX12_GetBackendData();
IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplDX12_Init()?");
if (!bd->pPipelineState)
if (!bd->pPipelineStateLinear)
if (!ImGui_ImplDX12_CreateDeviceObjects())
IM_ASSERT(0 && "ImGui_ImplDX12_CreateDeviceObjects() failed!");
}