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Backends: DX12, Viewports: Fixed issue on shutdown when viewports are disabled. (#3347)

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This commit is contained in:
omar 2020-07-10 12:09:24 +02:00
parent 4f5aac319e
commit cb1d578470
1 changed files with 26 additions and 12 deletions
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38
examples/imgui_impl_dx12.cpp
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@ -49,6 +49,7 @@ static D3D12_GPU_DESCRIPTOR_HANDLE g_hFontSrvGpuDescHandle = {};
static ID3D12DescriptorHeap* g_pd3dSrvDescHeap = NULL;
static UINT g_numFramesInFlight = 0;
// Buffers used during the rendering of a frame
struct FrameResources
{
ID3D12Resource* IndexBuffer;
@ -57,6 +58,7 @@ struct FrameResources
int VertexBufferSize;
};
// Buffers used for secondary viewports created by the multi-viewports systems
struct FrameContext
{
ID3D12CommandAllocator* CommandAllocator;
@ -64,7 +66,7 @@ struct FrameContext
D3D12_CPU_DESCRIPTOR_HANDLE RenderTargetCpuDescriptors;
};
// Helper structure we store in the void* RenderUserData field of each ImGuiViewport to easily retrieve our backend data.
// Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
struct ImGuiViewportDataDx12
{
ID3D12CommandQueue* CommandQueue;
@ -133,6 +135,13 @@ static void SafeRelease(T*& res)
res = NULL;
}
static void ImGui_ImplDX12_DestroyFrameResources(FrameResources* resources)
{
SafeRelease(resources->IndexBuffer);
SafeRelease(resources->VertexBuffer);
resources->IndexBufferSize = resources->VertexBufferSize = 0;
}
struct VERTEX_CONSTANT_BUFFER
{
float mvp[4][4];
@ -699,6 +708,8 @@ bool ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FO
g_numFramesInFlight = num_frames_in_flight;
g_pd3dSrvDescHeap = cbv_srv_heap;
// Create a dummy ImGuiViewportDataDx12 holder for the main viewport,
// Since this is created and managed by the application, we will only use the ->Resources[] fields.
ImGuiViewport* main_viewport = ImGui::GetMainViewport();
main_viewport->RendererUserData = IM_NEW(ImGuiViewportDataDx12)();
@ -712,6 +723,18 @@ bool ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FO
void ImGui_ImplDX12_Shutdown()
{
// Manually delete main viewport render resources in-case we haven't initialized for viewports
ImGuiViewport* main_viewport = ImGui::GetMainViewport();
if (ImGuiViewportDataDx12* data = (ImGuiViewportDataDx12*)main_viewport->RendererUserData)
{
// We could just call ImGui_ImplDX12_DestroyWindow(main_viewport) as a convenience but that would be misleading since we only use data->Resources[]
for (UINT i = 0; i < g_numFramesInFlight; i++)
ImGui_ImplDX12_DestroyFrameResources(&data->Resources[i]);
IM_DELETE(data);
main_viewport->RendererUserData = NULL;
}
// Clean up windows and device objects
ImGui_ImplDX12_ShutdownPlatformInterface();
ImGui_ImplDX12_InvalidateDeviceObjects();
@ -720,11 +743,6 @@ void ImGui_ImplDX12_Shutdown()
g_hFontSrvGpuDescHandle.ptr = 0;
g_numFramesInFlight = 0;
g_pd3dSrvDescHeap = NULL;
ImGuiViewport* main_viewport = ImGui::GetMainViewport();
if (ImGuiViewportDataDx12* data = (ImGuiViewportDataDx12*)main_viewport->RendererUserData)
IM_DELETE(data);
main_viewport->RendererUserData = NULL;
}
void ImGui_ImplDX12_NewFrame()
@ -841,10 +859,7 @@ static void ImGui_ImplDX12_CreateWindow(ImGuiViewport* viewport)
}
for (UINT i = 0; i < g_numFramesInFlight; i++)
{
SafeRelease(data->Resources[i].IndexBuffer);
SafeRelease(data->Resources[i].VertexBuffer);
}
ImGui_ImplDX12_DestroyFrameResources(&data->Resources[i]);
}
static void ImGui_WaitForPendingOperations(ImGuiViewportDataDx12* data)
@ -880,8 +895,7 @@ static void ImGui_ImplDX12_DestroyWindow(ImGuiViewport* viewport)
{
SafeRelease(data->FrameCtx[i].RenderTarget);
SafeRelease(data->FrameCtx[i].CommandAllocator);
SafeRelease(data->Resources[i].IndexBuffer);
SafeRelease(data->Resources[i].VertexBuffer);
ImGui_ImplDX12_DestroyFrameResources(&data->Resources[i]);
}
IM_DELETE(data);
}