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75 lines
4.3 KiB
C
75 lines
4.3 KiB
C
// dear imgui: Renderer Backend for DirectX12
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// This needs to be used along with a Platform Backend (e.g. Win32)
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// Implemented features:
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// [X] Renderer: User texture binding. Use 'D3D12_GPU_DESCRIPTOR_HANDLE' as ImTextureID. Read the FAQ about ImTextureID!
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// [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
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// [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)GetPlatformIO().Renderer_RenderState'.
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// The aim of imgui_impl_dx12.h/.cpp is to be usable in your engine without any modification.
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// IF YOU FEEL YOU NEED TO MAKE ANY CHANGE TO THIS CODE, please share them and your feedback at https://github.com/ocornut/imgui/
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// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
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// Learn about Dear ImGui:
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// - FAQ https://dearimgui.com/faq
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// - Getting Started https://dearimgui.com/getting-started
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// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
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// - Introduction, links and more at the top of imgui.cpp
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#pragma once
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#include "imgui.h" // IMGUI_IMPL_API
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#ifndef IMGUI_DISABLE
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#include <dxgiformat.h> // DXGI_FORMAT
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#include <d3d12.h> // D3D12_CPU_DESCRIPTOR_HANDLE
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// Initialization data, for ImGui_ImplDX12_Init()
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struct ImGui_ImplDX12_InitInfo
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{
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ID3D12Device* Device;
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ID3D12CommandQueue* CommandQueue;
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int NumFramesInFlight;
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DXGI_FORMAT RTVFormat; // RenderTarget format.
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DXGI_FORMAT DSVFormat; // DepthStencilView format.
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void* UserData;
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// Allocating SRV descriptors for textures is up to the application, so we provide callbacks.
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// (current version of the backend will only allocate one descriptor, future versions will need to allocate more)
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ID3D12DescriptorHeap* SrvDescriptorHeap;
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void (*SrvDescriptorAllocFn)(ImGui_ImplDX12_InitInfo* info, D3D12_CPU_DESCRIPTOR_HANDLE* out_cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE* out_gpu_desc_handle);
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void (*SrvDescriptorFreeFn)(ImGui_ImplDX12_InitInfo* info, D3D12_CPU_DESCRIPTOR_HANDLE cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE gpu_desc_handle);
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#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
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D3D12_CPU_DESCRIPTOR_HANDLE LegacySingleSrvCpuDescriptor; // To facilitate transition from single descriptor to allocator callback, you may use those.
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D3D12_GPU_DESCRIPTOR_HANDLE LegacySingleSrvGpuDescriptor;
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#endif
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ImGui_ImplDX12_InitInfo() { memset(this, 0, sizeof(*this)); }
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};
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// Follow "Getting Started" link and check examples/ folder to learn about using backends!
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IMGUI_IMPL_API bool ImGui_ImplDX12_Init(ImGui_ImplDX12_InitInfo* info);
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IMGUI_IMPL_API void ImGui_ImplDX12_Shutdown();
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IMGUI_IMPL_API void ImGui_ImplDX12_NewFrame();
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IMGUI_IMPL_API void ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3D12GraphicsCommandList* graphics_command_list);
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#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
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// Legacy initialization API Obsoleted in 1.91.5
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// font_srv_cpu_desc_handle and font_srv_gpu_desc_handle are handles to a single SRV descriptor to use for the internal font texture, they must be in 'srv_descriptor_heap'
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IMGUI_IMPL_API bool ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FORMAT rtv_format, ID3D12DescriptorHeap* srv_descriptor_heap, D3D12_CPU_DESCRIPTOR_HANDLE font_srv_cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE font_srv_gpu_desc_handle);
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#endif
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// Use if you want to reset your rendering device without losing Dear ImGui state.
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IMGUI_IMPL_API bool ImGui_ImplDX12_CreateDeviceObjects();
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IMGUI_IMPL_API void ImGui_ImplDX12_InvalidateDeviceObjects();
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// [BETA] Selected render state data shared with callbacks.
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// This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplDX12_RenderDrawData() call.
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// (Please open an issue if you feel you need access to more data)
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struct ImGui_ImplDX12_RenderState
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{
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ID3D12Device* Device;
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ID3D12GraphicsCommandList* CommandList;
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};
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#endif // #ifndef IMGUI_DISABLE
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