mirror of
https://github.com/cimgui/cimgui.git
synced 2025-08-13 21:28:30 +01:00
add backend_test/example_glfw_dx11
This commit is contained in:
sonoro1234
247
backend_test/example_glfw_dx11/main.c
Normal file
247
backend_test/example_glfw_dx11/main.c
Normal file
@@ -0,0 +1,247 @@
|
||||
#define CIMGUI_DEFINE_ENUMS_AND_STRUCTS
|
||||
#include "cimgui.h"
|
||||
#include "cimgui_impl.h"
|
||||
#define D3D11_NO_HELPERS
|
||||
#define CINTERFACE
|
||||
#define COBJMACROS
|
||||
#define WIN32_LEAN_AND_MEAN
|
||||
#include <d3d11.h>
|
||||
#include <GLFW/glfw3.h>
|
||||
#define GLFW_EXPOSE_NATIVE_WIN32
|
||||
#include <GLFW/glfw3native.h>
|
||||
#include <stdio.h>
|
||||
#ifdef _MSC_VER
|
||||
#include <windows.h>
|
||||
#endif
|
||||
|
||||
#pragma comment(lib, "dxguid.lib")
|
||||
|
||||
#ifdef IMGUI_HAS_IMSTR
|
||||
#define igBegin igBegin_Str
|
||||
#define igSliderFloat igSliderFloat_Str
|
||||
#define igCheckbox igCheckbox_Str
|
||||
#define igColorEdit3 igColorEdit3_Str
|
||||
#define igButton igButton_Str
|
||||
#endif
|
||||
|
||||
GLFWwindow *window;
|
||||
|
||||
// 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();
|
||||
|
||||
void window_size_callback(GLFWwindow* window, int width, int height)
|
||||
{
|
||||
CleanupRenderTarget();
|
||||
IDXGISwapChain_ResizeBuffers(g_pSwapChain, 0, width, height, DXGI_FORMAT_UNKNOWN, 0);
|
||||
CreateRenderTarget();
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
|
||||
if (!glfwInit())
|
||||
return -1;
|
||||
|
||||
// Decide GL+GLSL versions
|
||||
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
|
||||
|
||||
|
||||
|
||||
// just an extra window hint for resize
|
||||
glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
|
||||
|
||||
window = glfwCreateWindow(1024, 768, "Hello World!", NULL, NULL);
|
||||
if (!window)
|
||||
{
|
||||
printf("Failed to create window! Terminating!\n");
|
||||
glfwTerminate();
|
||||
return -1;
|
||||
}
|
||||
|
||||
//
|
||||
HWND hwnd = glfwGetWin32Window(window);
|
||||
if (hwnd == NULL)
|
||||
{
|
||||
printf("Failed to get win32 window! Terminating!\n");
|
||||
glfwTerminate();
|
||||
return -1;
|
||||
}
|
||||
// Initialize Direct3D
|
||||
if (!CreateDeviceD3D(hwnd))
|
||||
{
|
||||
CleanupDeviceD3D();
|
||||
return 1;
|
||||
}
|
||||
|
||||
glfwSetWindowSizeCallback(window, window_size_callback);
|
||||
|
||||
// setup imgui
|
||||
igCreateContext(NULL);
|
||||
|
||||
// set docking
|
||||
ImGuiIO *ioptr = igGetIO();
|
||||
ioptr->ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
|
||||
//ioptr->ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
|
||||
#ifdef IMGUI_HAS_DOCK
|
||||
ioptr->ConfigFlags |= ImGuiConfigFlags_DockingEnable; // Enable Docking
|
||||
ioptr->ConfigFlags |= ImGuiConfigFlags_ViewportsEnable; // Enable Multi-Viewport / Platform Windows
|
||||
#endif
|
||||
|
||||
ImGui_ImplGlfw_InitForOther(window, true);
|
||||
ImGui_ImplDX11_Init(g_pd3dDevice, g_pd3dDeviceContext);
|
||||
|
||||
igStyleColorsDark(NULL);
|
||||
// ImFontAtlas_AddFontDefault(io.Fonts, NULL);
|
||||
|
||||
bool showDemoWindow = true;
|
||||
bool showAnotherWindow = false;
|
||||
ImVec4 clearColor;
|
||||
clearColor.x = 0.45f;
|
||||
clearColor.y = 0.55f;
|
||||
clearColor.z = 0.60f;
|
||||
clearColor.w = 1.00f;
|
||||
|
||||
// main event loop
|
||||
bool quit = false;
|
||||
while (!glfwWindowShouldClose(window))
|
||||
{
|
||||
|
||||
glfwPollEvents();
|
||||
|
||||
// start imgui frame
|
||||
ImGui_ImplDX11_NewFrame();
|
||||
ImGui_ImplGlfw_NewFrame();
|
||||
igNewFrame();
|
||||
|
||||
if (showDemoWindow)
|
||||
igShowDemoWindow(&showDemoWindow);
|
||||
|
||||
// show a simple window that we created ourselves.
|
||||
{
|
||||
static float f = 0.0f;
|
||||
static int counter = 0;
|
||||
|
||||
igBegin("Hello, world!", NULL, 0);
|
||||
igText("This is some useful text");
|
||||
igCheckbox("Demo window", &showDemoWindow);
|
||||
igCheckbox("Another window", &showAnotherWindow);
|
||||
|
||||
igSliderFloat("Float", &f, 0.0f, 1.0f, "%.3f", 0);
|
||||
igColorEdit3("clear color", (float *)&clearColor, 0);
|
||||
|
||||
ImVec2 buttonSize;
|
||||
buttonSize.x = 0;
|
||||
buttonSize.y = 0;
|
||||
if (igButton("Button", buttonSize))
|
||||
counter++;
|
||||
igSameLine(0.0f, -1.0f);
|
||||
igText("counter = %d", counter);
|
||||
|
||||
igText("Application average %.3f ms/frame (%.1f FPS)",
|
||||
1000.0f / igGetIO()->Framerate, igGetIO()->Framerate);
|
||||
igEnd();
|
||||
}
|
||||
|
||||
if (showAnotherWindow)
|
||||
{
|
||||
igBegin("imgui Another Window", &showAnotherWindow, 0);
|
||||
igText("Hello from imgui");
|
||||
ImVec2 buttonSize;
|
||||
buttonSize.x = 0;
|
||||
buttonSize.y = 0;
|
||||
if (igButton("Close me", buttonSize)) {
|
||||
showAnotherWindow = false;
|
||||
}
|
||||
igEnd();
|
||||
}
|
||||
|
||||
// render
|
||||
igRender();
|
||||
const float clear_color_with_alpha[4] = { clearColor.x * clearColor.w, clearColor.y * clearColor.w, clearColor.z * clearColor.w, clearColor.w };
|
||||
ID3D11DeviceContext_OMSetRenderTargets(g_pd3dDeviceContext, 1, &g_mainRenderTargetView, NULL);
|
||||
ID3D11DeviceContext_ClearRenderTargetView(g_pd3dDeviceContext, g_mainRenderTargetView, clear_color_with_alpha);
|
||||
ImGui_ImplDX11_RenderDrawData(igGetDrawData());
|
||||
#ifdef IMGUI_HAS_DOCK
|
||||
if (ioptr->ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
|
||||
{
|
||||
igUpdatePlatformWindows();
|
||||
igRenderPlatformWindowsDefault(NULL, NULL);
|
||||
}
|
||||
#endif
|
||||
IDXGISwapChain_Present(g_pSwapChain,1, 0); // Present with vsync
|
||||
//g_pSwapChain->Present(0, 0); // Present without vsync
|
||||
}
|
||||
|
||||
// clean up
|
||||
ImGui_ImplDX11_Shutdown();
|
||||
ImGui_ImplGlfw_Shutdown();
|
||||
igDestroyContext(NULL);
|
||||
|
||||
CleanupDeviceD3D();
|
||||
glfwDestroyWindow(window);
|
||||
glfwTerminate();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Helper functions to use DirectX11
|
||||
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) { IDXGISwapChain_Release(g_pSwapChain); g_pSwapChain = NULL; }
|
||||
if (g_pd3dDeviceContext) { ID3D11DeviceContext_Release(g_pd3dDeviceContext); g_pd3dDeviceContext = NULL; }
|
||||
if (g_pd3dDevice) { ID3D11Device_Release(g_pd3dDevice); g_pd3dDevice = NULL; }
|
||||
}
|
||||
|
||||
void CreateRenderTarget()
|
||||
{
|
||||
ID3D11Texture2D* pBackBuffer;
|
||||
IDXGISwapChain_GetBuffer(g_pSwapChain, 0, &IID_ID3D11Texture2D, (void**)&pBackBuffer);
|
||||
ID3D11Device_CreateRenderTargetView(g_pd3dDevice, pBackBuffer, NULL, &g_mainRenderTargetView);
|
||||
ID3D11Texture2D_Release(pBackBuffer);
|
||||
}
|
||||
|
||||
void CleanupRenderTarget()
|
||||
{
|
||||
if (g_mainRenderTargetView) { ID3D11RenderTargetView_Release(g_mainRenderTargetView); g_mainRenderTargetView = NULL; }
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user