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Examples: DX12: Empty skeleton toward implementing the multi-viewport api for DirectX12. (WIP/test API) (#1542, #301)

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features/sdl_renderer3_multiviewports
omar ago%!(EXTRA string=7 years)
parent cb601d79e8
commit baef79415b
2 changed files with 149 additions and 2 deletions
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  1. 7
      examples/directx12_example/main.cpp
  2. 144
      examples/imgui_impl_dx12.cpp

7
examples/directx12_example/main.cpp
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@ -93,7 +93,7 @@ void ResizeSwapChain(HWND hWnd, int width, int height)
sd.Width = width;
sd.Height = height;
IDXGIFactory4* dxgiFactory = nullptr;
IDXGIFactory4* dxgiFactory = NULL;
g_pSwapChain->GetParent(IID_PPV_ARGS(&dxgiFactory));
g_pSwapChain->Release();
@ -289,7 +289,9 @@ int main(int, char**)
// Setup ImGui binding
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.ConfigFlags |= ImGuiConfigFlags_MultiViewports;
//io.NavFlags |= ImGuiNavFlags_EnableKeyboard; // Enable Keyboard Controls
ImGui_ImplWin32_Init(hwnd);
ImGui_ImplDX12_Init(g_pd3dDevice, NUM_FRAMES_IN_FLIGHT, DXGI_FORMAT_R8G8B8A8_UNORM,
g_pd3dSrvDescHeap->GetCPUDescriptorHandleForHeapStart(), g_pd3dSrvDescHeap->GetGPUDescriptorHandleForHeapStart());
@ -399,6 +401,9 @@ int main(int, char**)
g_pd3dCommandQueue->ExecuteCommandLists(1, (ID3D12CommandList* const*)&g_pd3dCommandList);
ImGui::UpdatePlatformWindows();
ImGui::RenderPlatformWindows();
g_pSwapChain->Present(1, 0); // Present with vsync
//g_pSwapChain->Present(0, 0); // Present without vsync

144
examples/imgui_impl_dx12.cpp
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@ -18,6 +18,7 @@
// DirectX
#include <d3d12.h>
#include <dxgi1_4.h>
#include <d3dcompiler.h>
// DirectX data
@ -48,6 +49,10 @@ struct VERTEX_CONSTANT_BUFFER
float mvp[4][4];
};
// Forward Declarations
static void ImGui_ImplDX12_InitPlatformInterface();
static void ImGui_ImplDX12_ShutdownPlatformInterface();
// Render function
// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
void ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data)
@ -587,7 +592,7 @@ bool ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FO
g_RTVFormat = rtv_format;
g_hFontSrvCpuDescHandle = font_srv_cpu_desc_handle;
g_hFontSrvGpuDescHandle = font_srv_gpu_desc_handle;
g_pFrameResources = new FrameResources [num_frames_in_flight];
g_pFrameResources = new FrameResources[num_frames_in_flight];
g_numFramesInFlight = num_frames_in_flight;
g_frameIndex = UINT_MAX;
@ -599,11 +604,16 @@ bool ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FO
g_pFrameResources[i].IndexBufferSize = 10000;
}
ImGuiIO& io = ImGui::GetIO();
if (io.ConfigFlags & ImGuiConfigFlags_MultiViewports)
ImGui_ImplDX12_InitPlatformInterface();
return true;
}
void ImGui_ImplDX12_Shutdown()
{
ImGui_ImplDX12_ShutdownPlatformInterface();
ImGui_ImplDX12_InvalidateDeviceObjects();
delete[] g_pFrameResources;
g_pd3dDevice = NULL;
@ -622,3 +632,135 @@ void ImGui_ImplDX12_NewFrame(ID3D12GraphicsCommandList* command_list)
g_pd3dCommandList = command_list;
}
// --------------------------------------------------------------------------------------------------------
// Platform Windows
// --------------------------------------------------------------------------------------------------------
#include "imgui_internal.h" // ImGuiViewport
struct ImGuiPlatformDataDx12
{
IDXGISwapChain3* SwapChain;
ImGuiPlatformDataDx12() { SwapChain = NULL; }
~ImGuiPlatformDataDx12() { IM_ASSERT(SwapChain == NULL); }
};
static void ImGui_ImplDX12_CreateViewport(ImGuiViewport* viewport)
{
ImGuiPlatformDataDx12* data = IM_NEW(ImGuiPlatformDataDx12)();
viewport->RendererUserData = data;
IM_ASSERT(0);
/*
// FIXME-PLATFORM
HWND hwnd = (HWND)viewport->PlatformHandle;
IM_ASSERT(hwnd != 0);
// Create swap chain
DXGI_SWAP_CHAIN_DESC sd;
ZeroMemory(&sd, sizeof(sd));
sd.BufferDesc.Width = (UINT)viewport->Size.x;
sd.BufferDesc.Height = (UINT)viewport->Size.y;
sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
sd.SampleDesc.Count = 1;
sd.SampleDesc.Quality = 0;
sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
sd.BufferCount = 1;
sd.OutputWindow = hwnd;
sd.Windowed = TRUE;
sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
sd.Flags = 0;
IM_ASSERT(data->SwapChain == NULL && data->RTView == NULL);
g_pFactory->CreateSwapChain(g_pd3dDevice, &sd, &data->SwapChain);
// Create the render target
if (data->SwapChain)
{
ID3D11Texture2D* pBackBuffer;
data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
pBackBuffer->Release();
}
*/
}
static void ImGui_ImplDX12_DestroyViewport(ImGuiViewport* viewport)
{
if (ImGuiPlatformDataDx12* data = (ImGuiPlatformDataDx12*)viewport->RendererUserData)
{
IM_ASSERT(0);
/*
if (data->SwapChain)
data->SwapChain->Release();
data->SwapChain = NULL;
if (data->RTView)
data->RTView->Release();
data->RTView = NULL;
IM_DELETE(data);
*/
}
viewport->RendererUserData = NULL;
}
static void ImGui_ImplDX12_ResizeViewport(ImGuiViewport* viewport, int w, int h)
{
ImGuiPlatformDataDx12* data = (ImGuiPlatformDataDx12*)viewport->RendererUserData;
IM_ASSERT(0);
/*
if (data->RTView)
{
data->RTView->Release();
data->RTView = NULL;
}
if (data->SwapChain)
{
ID3D11Texture2D* pBackBuffer = NULL;
data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
pBackBuffer->Release();
}
*/
}
static void ImGui_ImplDX12_RenderViewport(ImGuiViewport* viewport)
{
ImGuiPlatformDataDx12* data = (ImGuiPlatformDataDx12*)viewport->RendererUserData;
IM_ASSERT(0);
/*
ImVec4 clear_color = ImGui::GetStyle().Colors[ImGuiCol_WindowBg]; // FIXME-PLATFORM
clear_color.w = 1.0f;
g_pd3dDeviceContext->OMSetRenderTargets(1, &data->RTView, NULL);
g_pd3dDeviceContext->ClearRenderTargetView(data->RTView, (float*)&clear_color);
*/
ImGui_ImplDX12_RenderDrawData(&viewport->DrawData);
}
static void ImGui_ImplDX12_SwapBuffers(ImGuiViewport* viewport)
{
ImGuiPlatformDataDx12* data = (ImGuiPlatformDataDx12*)viewport->RendererUserData;
IM_ASSERT(0);
/*
data->SwapChain->Present(0, 0); // Present without vsync
*/
}
void ImGui_ImplDX12_InitPlatformInterface()
{
ImGuiIO& io = ImGui::GetIO();
io.RendererInterface.CreateViewport = ImGui_ImplDX12_CreateViewport;
io.RendererInterface.DestroyViewport = ImGui_ImplDX12_DestroyViewport;
io.RendererInterface.ResizeViewport = ImGui_ImplDX12_ResizeViewport;
io.RendererInterface.RenderViewport = ImGui_ImplDX12_RenderViewport;
io.RendererInterface.SwapBuffers = ImGui_ImplDX12_SwapBuffers;
}
void ImGui_ImplDX12_ShutdownPlatformInterface()
{
ImGuiIO& io = ImGui::GetIO();
memset(&io.RendererInterface, 0, sizeof(io.RendererInterface));
}

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