examples/example_win32_directx11/main.cpp - external/github.com/ocornut/imgui - Git at Google


            
            // dear imgui - standalone example application for DirectX 11

            
            // If you are new to dear imgui, see examples/README.txt and documentation at the top of imgui.cpp.


            #include "imgui.h"

            
            #include "imgui_impl_win32.h"

            
            #include "imgui_impl_dx11.h"

            
            #include <d3d11.h>

            
            #define DIRECTINPUT_VERSION 0x0800

            
            #include <dinput.h>

            
            #include <tchar.h>


            // Data

            
            static ID3D11Device*            g_pd3dDevice = NULL;

            
            static ID3D11DeviceContext*     g_pd3dDeviceContext = NULL;

            
            static IDXGISwapChain*          g_pSwapChain = NULL;

            
            static ID3D11RenderTargetView*  g_mainRenderTargetView = NULL;


            // Forward declarations of helper functions

            
            bool CreateDeviceD3D(HWND hWnd);

            
            void CleanupDeviceD3D();

            
            void CreateRenderTarget();

            
            void CleanupRenderTarget();

            
            LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);


            // Main code

            
            int main(int, char**)

            
            {

            
                // Create application window

            
                WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, NULL, NULL, _T("ImGui Example"), NULL };

            
                ::RegisterClassEx(&wc);

            
                HWND hwnd = ::CreateWindow(wc.lpszClassName, _T("Dear ImGui DirectX11 Example"), WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);


                // Initialize Direct3D

            
                if (!CreateDeviceD3D(hwnd))

            
                {

            
                    CleanupDeviceD3D();

            
                    ::UnregisterClass(wc.lpszClassName, wc.hInstance);

            
                    return 1;

            
                }


                // Show the window

            
                ::ShowWindow(hwnd, SW_SHOWDEFAULT);

            
                ::UpdateWindow(hwnd);


                // Setup Dear ImGui context

            
                IMGUI_CHECKVERSION();

            
                ImGui::CreateContext();

            
                ImGuiIO& io = ImGui::GetIO(); (void)io;

            
                //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls

            
                //io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls


                // Setup Dear ImGui style

            
                ImGui::StyleColorsDark();

            
                //ImGui::StyleColorsClassic();


                // Setup Platform/Renderer bindings

            
                ImGui_ImplWin32_Init(hwnd);

            
                ImGui_ImplDX11_Init(g_pd3dDevice, g_pd3dDeviceContext);


                // Load Fonts

            
                // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.

            
                // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.

            
                // - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).

            
                // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.

            
                // - Read 'docs/FONTS.txt' for more instructions and details.

            
                // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !

            
                //io.Fonts->AddFontDefault();

            
                //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);

            
                //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);

            
                //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);

            
                //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);

            
                //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());

            
                //IM_ASSERT(font != NULL);


                // Our state

            
                bool show_demo_window = true;

            
                bool show_another_window = false;

            
                ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);


                // Main loop

            
                MSG msg;

            
                ZeroMemory(&msg, sizeof(msg));

            
                while (msg.message != WM_QUIT)

            
                {

            
                    // Poll and handle messages (inputs, window resize, etc.)

            
                    // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.

            
                    // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.

            
                    // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.

            
                    // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.

            
                    if (::PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))

            
                    {

            
                        ::TranslateMessage(&msg);

            
                        ::DispatchMessage(&msg);

            
                        continue;

            
                    }


                    // Start the Dear ImGui frame

            
                    ImGui_ImplDX11_NewFrame();

            
                    ImGui_ImplWin32_NewFrame();

            
                    ImGui::NewFrame();


                    // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).

            
                    if (show_demo_window)

            
                        ImGui::ShowDemoWindow(&show_demo_window);


                    // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.

            
                    {

            
                        static float f = 0.0f;

            
                        static int counter = 0;


                        ImGui::Begin("Hello, world!");                          // Create a window called "Hello, world!" and append into it.


                        ImGui::Text("This is some useful text.");               // Display some text (you can use a format strings too)

            
                        ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our window open/close state

            
                        ImGui::Checkbox("Another Window", &show_another_window);


                        ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f

            
                        ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color


                        if (ImGui::Button("Button"))                            // Buttons return true when clicked (most widgets return true when edited/activated)

            
                            counter++;

            
                        ImGui::SameLine();

            
                        ImGui::Text("counter = %d", counter);


                        ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);

            
                        ImGui::End();

            
                    }


                    // 3. Show another simple window.

            
                    if (show_another_window)

            
                    {

            
                        ImGui::Begin("Another Window", &show_another_window);   // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)

            
                        ImGui::Text("Hello from another window!");

            
                        if (ImGui::Button("Close Me"))

            
                            show_another_window = false;

            
                        ImGui::End();

            
                    }


                    // Rendering

            
                    ImGui::Render();

            
                    g_pd3dDeviceContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);

            
                    g_pd3dDeviceContext->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_color);

            
                    ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());


                    g_pSwapChain->Present(1, 0); // Present with vsync

            
                    //g_pSwapChain->Present(0, 0); // Present without vsync

            
                }


                // Cleanup

            
                ImGui_ImplDX11_Shutdown();

            
                ImGui_ImplWin32_Shutdown();

            
                ImGui::DestroyContext();


                CleanupDeviceD3D();

            
                ::DestroyWindow(hwnd);

            
                ::UnregisterClass(wc.lpszClassName, wc.hInstance);


                return 0;

            
            }


            // Helper functions


            bool CreateDeviceD3D(HWND hWnd)

            
            {

            
                // Setup swap chain

            
                DXGI_SWAP_CHAIN_DESC sd;

            
                ZeroMemory(&sd, sizeof(sd));

            
                sd.BufferCount = 2;

            
                sd.BufferDesc.Width = 0;

            
                sd.BufferDesc.Height = 0;

            
                sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;

            
                sd.BufferDesc.RefreshRate.Numerator = 60;

            
                sd.BufferDesc.RefreshRate.Denominator = 1;

            
                sd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;

            
                sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;

            
                sd.OutputWindow = hWnd;

            
                sd.SampleDesc.Count = 1;

            
                sd.SampleDesc.Quality = 0;

            
                sd.Windowed = TRUE;

            
                sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;


                UINT createDeviceFlags = 0;

            
                //createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;

            
                D3D_FEATURE_LEVEL featureLevel;

            
                const D3D_FEATURE_LEVEL featureLevelArray[2] = { D3D_FEATURE_LEVEL_11_0, D3D_FEATURE_LEVEL_10_0, };

            
                if (D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, featureLevelArray, 2, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext) != S_OK)

            
                    return false;


                CreateRenderTarget();

            
                return true;

            
            }


            void CleanupDeviceD3D()

            
            {

            
                CleanupRenderTarget();

            
                if (g_pSwapChain) { g_pSwapChain->Release(); g_pSwapChain = NULL; }

            
                if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }

            
                if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }

            
            }


            void CreateRenderTarget()

            
            {

            
                ID3D11Texture2D* pBackBuffer;

            
                g_pSwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));

            
                g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &g_mainRenderTargetView);

            
                pBackBuffer->Release();

            
            }


            void CleanupRenderTarget()

            
            {

            
                if (g_mainRenderTargetView) { g_mainRenderTargetView->Release(); g_mainRenderTargetView = NULL; }

            
            }


            // Win32 message handler

            
            extern LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

            
            LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)

            
            {

            
                if (ImGui_ImplWin32_WndProcHandler(hWnd, msg, wParam, lParam))

            
                    return true;


                switch (msg)

            
                {

            
                case WM_SIZE:

            
                    if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)

            
                    {

            
                        CleanupRenderTarget();

            
                        g_pSwapChain->ResizeBuffers(0, (UINT)LOWORD(lParam), (UINT)HIWORD(lParam), DXGI_FORMAT_UNKNOWN, 0);

            
                        CreateRenderTarget();

            
                    }

            
                    return 0;

            
                case WM_SYSCOMMAND:

            
                    if ((wParam & 0xfff0) == SC_KEYMENU) // Disable ALT application menu

            
                        return 0;

            
                    break;

            
                case WM_DESTROY:

            
                    ::PostQuitMessage(0);

            
                    return 0;

            
                }

            
                return ::DefWindowProc(hWnd, msg, wParam, lParam);

            
            }
	// dear imgui - standalone example application for DirectX 11
	// If you are new to dear imgui, see examples/README.txt and documentation at the top of imgui.cpp.

	#include "imgui.h"
	#include "imgui_impl_win32.h"
	#include "imgui_impl_dx11.h"
	#include <d3d11.h>
	#define DIRECTINPUT_VERSION 0x0800
	#include <dinput.h>
	#include <tchar.h>

	// Data
	static ID3D11Device* g_pd3dDevice = NULL;
	static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
	static IDXGISwapChain* g_pSwapChain = NULL;
	static ID3D11RenderTargetView* g_mainRenderTargetView = NULL;

	// Forward declarations of helper functions
	bool CreateDeviceD3D(HWND hWnd);
	void CleanupDeviceD3D();
	void CreateRenderTarget();
	void CleanupRenderTarget();
	LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

	// Main code
	int main(int, char**)
	{
	// Create application window
	WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, NULL, NULL, _T("ImGui Example"), NULL };
	::RegisterClassEx(&wc);
	HWND hwnd = ::CreateWindow(wc.lpszClassName, _T("Dear ImGui DirectX11 Example"), WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);

	// Initialize Direct3D
	if (!CreateDeviceD3D(hwnd))
	{
	CleanupDeviceD3D();
	::UnregisterClass(wc.lpszClassName, wc.hInstance);
	return 1;
	}

	// Show the window
	::ShowWindow(hwnd, SW_SHOWDEFAULT);
	::UpdateWindow(hwnd);

	// Setup Dear ImGui context
	IMGUI_CHECKVERSION();
	ImGui::CreateContext();
	ImGuiIO& io = ImGui::GetIO(); (void)io;
	//io.ConfigFlags \|= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
	//io.ConfigFlags \|= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls

	// Setup Dear ImGui style
	ImGui::StyleColorsDark();
	//ImGui::StyleColorsClassic();

	// Setup Platform/Renderer bindings
	ImGui_ImplWin32_Init(hwnd);
	ImGui_ImplDX11_Init(g_pd3dDevice, g_pd3dDeviceContext);

	// Load Fonts
	// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
	// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
	// - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
	// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
	// - Read 'docs/FONTS.txt' for more instructions and details.
	// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
	//io.Fonts->AddFontDefault();
	//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
	//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
	//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
	//io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
	//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
	//IM_ASSERT(font != NULL);

	// Our state
	bool show_demo_window = true;
	bool show_another_window = false;
	ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);

	// Main loop
	MSG msg;
	ZeroMemory(&msg, sizeof(msg));
	while (msg.message != WM_QUIT)
	{
	// Poll and handle messages (inputs, window resize, etc.)
	// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
	// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
	// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
	// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
	if (::PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
	{
	::TranslateMessage(&msg);
	::DispatchMessage(&msg);
	continue;
	}

	// Start the Dear ImGui frame
	ImGui_ImplDX11_NewFrame();
	ImGui_ImplWin32_NewFrame();
	ImGui::NewFrame();

	// 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
	if (show_demo_window)
	ImGui::ShowDemoWindow(&show_demo_window);

	// 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.
	{
	static float f = 0.0f;
	static int counter = 0;

	ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.

	ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
	ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
	ImGui::Checkbox("Another Window", &show_another_window);

	ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
	ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color

	if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
	counter++;
	ImGui::SameLine();
	ImGui::Text("counter = %d", counter);

	ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
	ImGui::End();
	}

	// 3. Show another simple window.
	if (show_another_window)
	{
	ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
	ImGui::Text("Hello from another window!");
	if (ImGui::Button("Close Me"))
	show_another_window = false;
	ImGui::End();
	}

	// Rendering
	ImGui::Render();
	g_pd3dDeviceContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);
	g_pd3dDeviceContext->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_color);
	ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());

	g_pSwapChain->Present(1, 0); // Present with vsync
	//g_pSwapChain->Present(0, 0); // Present without vsync
	}

	// Cleanup
	ImGui_ImplDX11_Shutdown();
	ImGui_ImplWin32_Shutdown();
	ImGui::DestroyContext();

	CleanupDeviceD3D();
	::DestroyWindow(hwnd);
	::UnregisterClass(wc.lpszClassName, wc.hInstance);

	return 0;
	}

	// Helper functions

	bool CreateDeviceD3D(HWND hWnd)
	{
	// Setup swap chain
	DXGI_SWAP_CHAIN_DESC sd;
	ZeroMemory(&sd, sizeof(sd));
	sd.BufferCount = 2;
	sd.BufferDesc.Width = 0;
	sd.BufferDesc.Height = 0;
	sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	sd.BufferDesc.RefreshRate.Numerator = 60;
	sd.BufferDesc.RefreshRate.Denominator = 1;
	sd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
	sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
	sd.OutputWindow = hWnd;
	sd.SampleDesc.Count = 1;
	sd.SampleDesc.Quality = 0;
	sd.Windowed = TRUE;
	sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;

	UINT createDeviceFlags = 0;
	//createDeviceFlags \|= D3D11_CREATE_DEVICE_DEBUG;
	D3D_FEATURE_LEVEL featureLevel;
	const D3D_FEATURE_LEVEL featureLevelArray[2] = { D3D_FEATURE_LEVEL_11_0, D3D_FEATURE_LEVEL_10_0, };
	if (D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, featureLevelArray, 2, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext) != S_OK)
	return false;

	CreateRenderTarget();
	return true;
	}

	void CleanupDeviceD3D()
	{
	CleanupRenderTarget();
	if (g_pSwapChain) { g_pSwapChain->Release(); g_pSwapChain = NULL; }
	if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
	if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
	}

	void CreateRenderTarget()
	{
	ID3D11Texture2D* pBackBuffer;
	g_pSwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
	g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &g_mainRenderTargetView);
	pBackBuffer->Release();
	}

	void CleanupRenderTarget()
	{
	if (g_mainRenderTargetView) { g_mainRenderTargetView->Release(); g_mainRenderTargetView = NULL; }
	}

	// Win32 message handler
	extern LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
	LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
	{
	if (ImGui_ImplWin32_WndProcHandler(hWnd, msg, wParam, lParam))
	return true;

	switch (msg)
	{
	case WM_SIZE:
	if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)
	{
	CleanupRenderTarget();
	g_pSwapChain->ResizeBuffers(0, (UINT)LOWORD(lParam), (UINT)HIWORD(lParam), DXGI_FORMAT_UNKNOWN, 0);
	CreateRenderTarget();
	}
	return 0;
	case WM_SYSCOMMAND:
	if ((wParam & 0xfff0) == SC_KEYMENU) // Disable ALT application menu
	return 0;
	break;
	case WM_DESTROY:
	::PostQuitMessage(0);
	return 0;
	}
	return ::DefWindowProc(hWnd, msg, wParam, lParam);
	}