examples/directx9_example/main.cpp - external/github.com/ocornut/imgui - Git at Google

 // ImGui - standalone example application for DirectX 9

 #include <windows.h>
 #include "../../imgui.h"

 // DirectX 9
 #include <d3dx9.h>
 #define DIRECTINPUT_VERSION 0x0800
 #include <dinput.h>

 #pragma warning (disable: 4996)     // 'This function or variable may be unsafe': strdup

 static HWND                    hWnd;
 static LPDIRECT3D9             g_pD3D = NULL;       // Used to create the D3DDevice
 static LPDIRECT3DDEVICE9       g_pd3dDevice = NULL; // Our rendering device
 static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL;        // Buffer to hold vertices
 struct CUSTOMVERTEX
 {
     D3DXVECTOR3 pos;
     D3DCOLOR    col;
     D3DXVECTOR2 uv;
 };
 #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE|D3DFVF_TEX1)

 // This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
 // If text or lines are blurry when integrating ImGui in your engine:
 // - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
 static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
 {
     size_t total_vtx_count = 0;
     for (int n = 0; n < cmd_lists_count; n++)
         total_vtx_count += cmd_lists[n]->vtx_buffer.size();
     if (total_vtx_count == 0)
         return;

     // Copy and convert all vertices into a single contiguous buffer
     CUSTOMVERTEX* vtx_dst;
     if (g_pVB->Lock(0, (UINT)total_vtx_count, (void**)&vtx_dst, D3DLOCK_DISCARD) < 0)
         return;
     for (int n = 0; n < cmd_lists_count; n++)
     {
         const ImDrawList* cmd_list = cmd_lists[n];
         const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
         for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
         {
             vtx_dst->pos.x = vtx_src->pos.x;
             vtx_dst->pos.y = vtx_src->pos.y;
             vtx_dst->pos.z = 0.0f;
             vtx_dst->col = (vtx_src->col & 0xFF00FF00) | ((vtx_src->col & 0xFF0000)>>16) | ((vtx_src->col & 0xFF) << 16);     // RGBA --> ARGB for DirectX9
             vtx_dst->uv.x = vtx_src->uv.x;
             vtx_dst->uv.y = vtx_src->uv.y;
             vtx_dst++;
             vtx_src++;
         }
     }
     g_pVB->Unlock();

     g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof( CUSTOMVERTEX ) );
     g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );

     // Setup render state: alpha-blending, no face culling, no depth testing
     g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
     g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, false );
     g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, false );
     g_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, true );
     g_pd3dDevice->SetRenderState( D3DRS_BLENDOP, D3DBLENDOP_ADD );
     g_pd3dDevice->SetRenderState( D3DRS_ALPHATESTENABLE, false );
     g_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
     g_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA );
     g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, true );
     g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
     g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_DIFFUSE );
     g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
     g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
     g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
     g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
     g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );

     // Setup orthographic projection matrix
     D3DXMATRIXA16 mat;
     D3DXMatrixIdentity(&mat);
     g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat);
     g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat);
     D3DXMatrixOrthoOffCenterLH(&mat, 0.5f, ImGui::GetIO().DisplaySize.x+0.5f, ImGui::GetIO().DisplaySize.y+0.5f, 0.5f, -1.0f, +1.0f);
     g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat);

     // Render command lists
     int vtx_offset = 0;
     for (int n = 0; n < cmd_lists_count; n++)
     {
         // Render command list
         const ImDrawList* cmd_list = cmd_lists[n];
         for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
             const RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
             g_pd3dDevice->SetTexture( 0, (LPDIRECT3DTEXTURE9)pcmd->texture_id );
             g_pd3dDevice->SetScissorRect(&r);
             g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3);
             vtx_offset += pcmd->vtx_count;
         }
     }
 }

 HRESULT InitDeviceD3D(HWND hWnd)
 {
     if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
         return E_FAIL;

     D3DPRESENT_PARAMETERS d3dpp;
     ZeroMemory(&d3dpp, sizeof(d3dpp));
     d3dpp.Windowed = TRUE;
     d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
     d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
     d3dpp.EnableAutoDepthStencil = TRUE;
     d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
     d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;

     // Create the D3DDevice
     if (g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice) < 0)
         return E_FAIL;

     return S_OK;
 }

 void CleanupDevice()
 {
     // InitImGui
     if (g_pVB) g_pVB->Release();

     // InitDeviceD3D
     if (LPDIRECT3DTEXTURE9 tex = (LPDIRECT3DTEXTURE9)ImGui::GetIO().Fonts->TexID)
         tex->Release();
     if (g_pd3dDevice) g_pd3dDevice->Release();
     if (g_pD3D) g_pD3D->Release();
 }

 LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     ImGuiIO& io = ImGui::GetIO();
     switch (msg)
     {
     case WM_LBUTTONDOWN:
         io.MouseDown[0] = true;
         return true;
     case WM_LBUTTONUP:
         io.MouseDown[0] = false;
         return true;
     case WM_RBUTTONDOWN:
         io.MouseDown[1] = true;
         return true;
     case WM_RBUTTONUP:
         io.MouseDown[1] = false;
         return true;
     case WM_MOUSEWHEEL:
         io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
         return true;
     case WM_MOUSEMOVE:
         // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
         io.MousePos.x = (signed short)(lParam);
         io.MousePos.y = (signed short)(lParam >> 16);
         return true;
     case WM_CHAR:
         // You can also use ToAscii()+GetKeyboardState() to retrieve characters.
         if (wParam > 0 && wParam < 0x10000)
             io.AddInputCharacter((unsigned short)wParam);
         return true;
     case WM_DESTROY:
         CleanupDevice();
         PostQuitMessage(0);
         return 0;
     }
     return DefWindowProc(hWnd, msg, wParam, lParam);
 }

 void LoadFontsTexture()
 {
     // Load one or more font
     ImGuiIO& io = ImGui::GetIO();
     //ImFont* my_font1 = io.Fonts->AddFontDefault();
     //ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("extra_fonts/Karla-Regular.ttf", 15.0f);
     //ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
     //ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
     //ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 20.0f, io.Fonts->GetGlyphRangesJapanese());

     // Build
     unsigned char* pixels;
     int width, height, bytes_per_pixel;
     io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height, &bytes_per_pixel);

     // Create texture
     LPDIRECT3DTEXTURE9 pTexture = NULL;
     if (D3DXCreateTexture(g_pd3dDevice, width, height, 1, D3DUSAGE_DYNAMIC, D3DFMT_A8, D3DPOOL_DEFAULT, &pTexture) < 0)
     {
         IM_ASSERT(0);
         return;
     }

     // Copy pixels
     D3DLOCKED_RECT tex_locked_rect;
     if (pTexture->LockRect(0, &tex_locked_rect, NULL, 0) != D3D_OK)
     {
         IM_ASSERT(0);
         return;
     }
     for (int y = 0; y < height; y++)
         memcpy((unsigned char *)tex_locked_rect.pBits + tex_locked_rect.Pitch * y, pixels + (width * bytes_per_pixel) * y, (width * bytes_per_pixel));
     pTexture->UnlockRect(0);

     // Store our identifier
     io.Fonts->TexID = (void *)pTexture;
 }

 void InitImGui()
 {
     RECT rect;
     GetClientRect(hWnd, &rect);
     int display_w = (int)(rect.right - rect.left);
     int display_h = (int)(rect.bottom - rect.top);

     ImGuiIO& io = ImGui::GetIO();
     io.DisplaySize = ImVec2((float)display_w, (float)display_h);   // Display size, in pixels. For clamping windows positions.
     io.DeltaTime = 1.0f/60.0f;                                     // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our time step is variable)
     io.KeyMap[ImGuiKey_Tab] = VK_TAB;                              // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
     io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
     io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
     io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
     io.KeyMap[ImGuiKey_DownArrow] = VK_UP;
     io.KeyMap[ImGuiKey_Home] = VK_HOME;
     io.KeyMap[ImGuiKey_End] = VK_END;
     io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
     io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
     io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
     io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
     io.KeyMap[ImGuiKey_A] = 'A';
     io.KeyMap[ImGuiKey_C] = 'C';
     io.KeyMap[ImGuiKey_V] = 'V';
     io.KeyMap[ImGuiKey_X] = 'X';
     io.KeyMap[ImGuiKey_Y] = 'Y';
     io.KeyMap[ImGuiKey_Z] = 'Z';

     io.RenderDrawListsFn = ImImpl_RenderDrawLists;

     // Create the vertex buffer
     if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
     {
         IM_ASSERT(0);
         return;
     }

     LoadFontsTexture();
 }

 INT64 ticks_per_second = 0;
 INT64 last_time = 0;

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

     // Setup time step
     INT64 current_time;
     QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
     io.DeltaTime = (float)(current_time - last_time) / ticks_per_second;
     last_time = current_time;

     // Setup inputs
     // (we already got mouse position, buttons, wheel from the window message callback)
     BYTE keystate[256];
     GetKeyboardState(keystate);
     for (int i = 0; i < 256; i++)
         io.KeysDown[i] = (keystate[i] & 0x80) != 0;
     io.KeyCtrl = (keystate[VK_CONTROL] & 0x80) != 0;
     io.KeyShift = (keystate[VK_SHIFT] & 0x80) != 0;
     // io.MousePos : filled by WM_MOUSEMOVE event
     // io.MouseDown : filled by WM_*BUTTON* events
     // io.MouseWheel : filled by WM_MOUSEWHEEL events

     // Start the frame
     ImGui::NewFrame();
 }

 int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
 {
     // Register the window class
     WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, LoadCursor(NULL, IDC_ARROW), NULL, NULL, L"ImGui Example", NULL };
     RegisterClassEx(&wc);

     // Create the application's window
     hWnd = CreateWindow(L"ImGui Example", L"ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);

     if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
         return 1;
     if (!QueryPerformanceCounter((LARGE_INTEGER *)&last_time))
         return 1;

     // Initialize Direct3D
     if (InitDeviceD3D(hWnd) < 0)
     {
         CleanupDevice();
         UnregisterClass(L"ImGui Example", wc.hInstance);
         return 1;
     }

     // Show the window
     ShowWindow(hWnd, SW_SHOWDEFAULT);
     UpdateWindow(hWnd);

     InitImGui();

     bool show_test_window = true;
     bool show_another_window = false;
     ImVec4 clear_col = ImColor(114, 144, 154);

     // Enter the message loop
     MSG msg;
     ZeroMemory(&msg, sizeof(msg));
     while (msg.message != WM_QUIT)
     {
         if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
         {
             TranslateMessage(&msg);
             DispatchMessage(&msg);
             continue;
         }
         UpdateImGui();

         // 1. Show a simple window
         // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
         {
             static float f;
             ImGui::Text("Hello, world!");
             ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
             ImGui::ColorEdit3("clear color", (float*)&clear_col);
             if (ImGui::Button("Test Window")) show_test_window ^= 1;
             if (ImGui::Button("Another Window")) show_another_window ^= 1;

             // Calculate and show frame rate
             static float ms_per_frame[120] = { 0 };
             static int ms_per_frame_idx = 0;
             static float ms_per_frame_accum = 0.0f;
             ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
             ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
             ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
             ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
             const float ms_per_frame_avg = ms_per_frame_accum / 120;
             ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
         }

         // 2. Show another simple window, this time using an explicit Begin/End pair
         if (show_another_window)
         {
             ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
             ImGui::Text("Hello");
             ImGui::End();
         }

         // 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
         if (show_test_window)
         {
             ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
             ImGui::ShowTestWindow(&show_test_window);
         }

         // Rendering
         g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
         g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
         g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
         D3DCOLOR clear_col_dx = D3DCOLOR_RGBA((int)(clear_col.x*255.0f), (int)(clear_col.y*255.0f), (int)(clear_col.z*255.0f), (int)(clear_col.w*255.0f));
         g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, clear_col_dx, 1.0f, 0);
         if (g_pd3dDevice->BeginScene() >= 0)
         {
             ImGui::Render();
             g_pd3dDevice->EndScene();
         }
         g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
     }

     ImGui::Shutdown();

     UnregisterClass(L"ImGui Example", wc.hInstance);
     return 0;
 }
	// ImGui - standalone example application for DirectX 9

	#include <windows.h>
	#include "../../imgui.h"

	// DirectX 9
	#include <d3dx9.h>
	#define DIRECTINPUT_VERSION 0x0800
	#include <dinput.h>

	#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strdup

	static HWND hWnd;
	static LPDIRECT3D9 g_pD3D = NULL; // Used to create the D3DDevice
	static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Our rendering device
	static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; // Buffer to hold vertices
	struct CUSTOMVERTEX
	{
	D3DXVECTOR3 pos;
	D3DCOLOR col;
	D3DXVECTOR2 uv;
	};
	#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ\|D3DFVF_DIFFUSE\|D3DFVF_TEX1)

	// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
	// If text or lines are blurry when integrating ImGui in your engine:
	// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
	static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
	{
	size_t total_vtx_count = 0;
	for (int n = 0; n < cmd_lists_count; n++)
	total_vtx_count += cmd_lists[n]->vtx_buffer.size();
	if (total_vtx_count == 0)
	return;

	// Copy and convert all vertices into a single contiguous buffer
	CUSTOMVERTEX* vtx_dst;
	if (g_pVB->Lock(0, (UINT)total_vtx_count, (void**)&vtx_dst, D3DLOCK_DISCARD) < 0)
	return;
	for (int n = 0; n < cmd_lists_count; n++)
	{
	const ImDrawList* cmd_list = cmd_lists[n];
	const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
	for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
	{
	vtx_dst->pos.x = vtx_src->pos.x;
	vtx_dst->pos.y = vtx_src->pos.y;
	vtx_dst->pos.z = 0.0f;
	vtx_dst->col = (vtx_src->col & 0xFF00FF00) \| ((vtx_src->col & 0xFF0000)>>16) \| ((vtx_src->col & 0xFF) << 16); // RGBA --> ARGB for DirectX9
	vtx_dst->uv.x = vtx_src->uv.x;
	vtx_dst->uv.y = vtx_src->uv.y;
	vtx_dst++;
	vtx_src++;
	}
	}
	g_pVB->Unlock();

	g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof( CUSTOMVERTEX ) );
	g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );

	// Setup render state: alpha-blending, no face culling, no depth testing
	g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
	g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, false );
	g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, false );
	g_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, true );
	g_pd3dDevice->SetRenderState( D3DRS_BLENDOP, D3DBLENDOP_ADD );
	g_pd3dDevice->SetRenderState( D3DRS_ALPHATESTENABLE, false );
	g_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
	g_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA );
	g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, true );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_DIFFUSE );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
	g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
	g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );

	// Setup orthographic projection matrix
	D3DXMATRIXA16 mat;
	D3DXMatrixIdentity(&mat);
	g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat);
	g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat);
	D3DXMatrixOrthoOffCenterLH(&mat, 0.5f, ImGui::GetIO().DisplaySize.x+0.5f, ImGui::GetIO().DisplaySize.y+0.5f, 0.5f, -1.0f, +1.0f);
	g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat);

	// Render command lists
	int vtx_offset = 0;
	for (int n = 0; n < cmd_lists_count; n++)
	{
	// Render command list
	const ImDrawList* cmd_list = cmd_lists[n];
	for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
	{
	const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
	const RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
	g_pd3dDevice->SetTexture( 0, (LPDIRECT3DTEXTURE9)pcmd->texture_id );
	g_pd3dDevice->SetScissorRect(&r);
	g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3);
	vtx_offset += pcmd->vtx_count;
	}
	}
	}

	HRESULT InitDeviceD3D(HWND hWnd)
	{
	if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
	return E_FAIL;

	D3DPRESENT_PARAMETERS d3dpp;
	ZeroMemory(&d3dpp, sizeof(d3dpp));
	d3dpp.Windowed = TRUE;
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
	d3dpp.EnableAutoDepthStencil = TRUE;
	d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
	d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;

	// Create the D3DDevice
	if (g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice) < 0)
	return E_FAIL;

	return S_OK;
	}

	void CleanupDevice()
	{
	// InitImGui
	if (g_pVB) g_pVB->Release();

	// InitDeviceD3D
	if (LPDIRECT3DTEXTURE9 tex = (LPDIRECT3DTEXTURE9)ImGui::GetIO().Fonts->TexID)
	tex->Release();
	if (g_pd3dDevice) g_pd3dDevice->Release();
	if (g_pD3D) g_pD3D->Release();
	}

	LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
	{
	ImGuiIO& io = ImGui::GetIO();
	switch (msg)
	{
	case WM_LBUTTONDOWN:
	io.MouseDown[0] = true;
	return true;
	case WM_LBUTTONUP:
	io.MouseDown[0] = false;
	return true;
	case WM_RBUTTONDOWN:
	io.MouseDown[1] = true;
	return true;
	case WM_RBUTTONUP:
	io.MouseDown[1] = false;
	return true;
	case WM_MOUSEWHEEL:
	io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
	return true;
	case WM_MOUSEMOVE:
	// Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
	io.MousePos.x = (signed short)(lParam);
	io.MousePos.y = (signed short)(lParam >> 16);
	return true;
	case WM_CHAR:
	// You can also use ToAscii()+GetKeyboardState() to retrieve characters.
	if (wParam > 0 && wParam < 0x10000)
	io.AddInputCharacter((unsigned short)wParam);
	return true;
	case WM_DESTROY:
	CleanupDevice();
	PostQuitMessage(0);
	return 0;
	}
	return DefWindowProc(hWnd, msg, wParam, lParam);
	}

	void LoadFontsTexture()
	{
	// Load one or more font
	ImGuiIO& io = ImGui::GetIO();
	//ImFont* my_font1 = io.Fonts->AddFontDefault();
	//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("extra_fonts/Karla-Regular.ttf", 15.0f);
	//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
	//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
	//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 20.0f, io.Fonts->GetGlyphRangesJapanese());

	// Build
	unsigned char* pixels;
	int width, height, bytes_per_pixel;
	io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height, &bytes_per_pixel);

	// Create texture
	LPDIRECT3DTEXTURE9 pTexture = NULL;
	if (D3DXCreateTexture(g_pd3dDevice, width, height, 1, D3DUSAGE_DYNAMIC, D3DFMT_A8, D3DPOOL_DEFAULT, &pTexture) < 0)
	{
	IM_ASSERT(0);
	return;
	}

	// Copy pixels
	D3DLOCKED_RECT tex_locked_rect;
	if (pTexture->LockRect(0, &tex_locked_rect, NULL, 0) != D3D_OK)
	{
	IM_ASSERT(0);
	return;
	}
	for (int y = 0; y < height; y++)
	memcpy((unsigned char )tex_locked_rect.pBits + tex_locked_rect.Pitch y, pixels + (width * bytes_per_pixel) * y, (width * bytes_per_pixel));
	pTexture->UnlockRect(0);

	// Store our identifier
	io.Fonts->TexID = (void *)pTexture;
	}

	void InitImGui()
	{
	RECT rect;
	GetClientRect(hWnd, &rect);
	int display_w = (int)(rect.right - rect.left);
	int display_h = (int)(rect.bottom - rect.top);

	ImGuiIO& io = ImGui::GetIO();
	io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions.
	io.DeltaTime = 1.0f/60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our time step is variable)
	io.KeyMap[ImGuiKey_Tab] = VK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
	io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
	io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
	io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
	io.KeyMap[ImGuiKey_DownArrow] = VK_UP;
	io.KeyMap[ImGuiKey_Home] = VK_HOME;
	io.KeyMap[ImGuiKey_End] = VK_END;
	io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
	io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
	io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
	io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
	io.KeyMap[ImGuiKey_A] = 'A';
	io.KeyMap[ImGuiKey_C] = 'C';
	io.KeyMap[ImGuiKey_V] = 'V';
	io.KeyMap[ImGuiKey_X] = 'X';
	io.KeyMap[ImGuiKey_Y] = 'Y';
	io.KeyMap[ImGuiKey_Z] = 'Z';

	io.RenderDrawListsFn = ImImpl_RenderDrawLists;

	// Create the vertex buffer
	if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC \| D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
	{
	IM_ASSERT(0);
	return;
	}

	LoadFontsTexture();
	}

	INT64 ticks_per_second = 0;
	INT64 last_time = 0;

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

	// Setup time step
	INT64 current_time;
	QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
	io.DeltaTime = (float)(current_time - last_time) / ticks_per_second;
	last_time = current_time;

	// Setup inputs
	// (we already got mouse position, buttons, wheel from the window message callback)
	BYTE keystate[256];
	GetKeyboardState(keystate);
	for (int i = 0; i < 256; i++)
	io.KeysDown[i] = (keystate[i] & 0x80) != 0;
	io.KeyCtrl = (keystate[VK_CONTROL] & 0x80) != 0;
	io.KeyShift = (keystate[VK_SHIFT] & 0x80) != 0;
	// io.MousePos : filled by WM_MOUSEMOVE event
	// io.MouseDown : filled by WM_BUTTON events
	// io.MouseWheel : filled by WM_MOUSEWHEEL events

	// Start the frame
	ImGui::NewFrame();
	}

	int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
	{
	// Register the window class
	WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, LoadCursor(NULL, IDC_ARROW), NULL, NULL, L"ImGui Example", NULL };
	RegisterClassEx(&wc);

	// Create the application's window
	hWnd = CreateWindow(L"ImGui Example", L"ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);

	if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
	return 1;
	if (!QueryPerformanceCounter((LARGE_INTEGER *)&last_time))
	return 1;

	// Initialize Direct3D
	if (InitDeviceD3D(hWnd) < 0)
	{
	CleanupDevice();
	UnregisterClass(L"ImGui Example", wc.hInstance);
	return 1;
	}

	// Show the window
	ShowWindow(hWnd, SW_SHOWDEFAULT);
	UpdateWindow(hWnd);

	InitImGui();

	bool show_test_window = true;
	bool show_another_window = false;
	ImVec4 clear_col = ImColor(114, 144, 154);

	// Enter the message loop
	MSG msg;
	ZeroMemory(&msg, sizeof(msg));
	while (msg.message != WM_QUIT)
	{
	if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
	{
	TranslateMessage(&msg);
	DispatchMessage(&msg);
	continue;
	}
	UpdateImGui();

	// 1. Show a simple window
	// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
	{
	static float f;
	ImGui::Text("Hello, world!");
	ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
	ImGui::ColorEdit3("clear color", (float*)&clear_col);
	if (ImGui::Button("Test Window")) show_test_window ^= 1;
	if (ImGui::Button("Another Window")) show_another_window ^= 1;

	// Calculate and show frame rate
	static float ms_per_frame[120] = { 0 };
	static int ms_per_frame_idx = 0;
	static float ms_per_frame_accum = 0.0f;
	ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
	ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
	ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
	ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
	const float ms_per_frame_avg = ms_per_frame_accum / 120;
	ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
	}

	// 2. Show another simple window, this time using an explicit Begin/End pair
	if (show_another_window)
	{
	ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
	ImGui::Text("Hello");
	ImGui::End();
	}

	// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
	if (show_test_window)
	{
	ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCondition_FirstUseEver);
	ImGui::ShowTestWindow(&show_test_window);
	}

	// Rendering
	g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
	g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
	g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
	D3DCOLOR clear_col_dx = D3DCOLOR_RGBA((int)(clear_col.x255.0f), (int)(clear_col.y255.0f), (int)(clear_col.z255.0f), (int)(clear_col.w255.0f));
	g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET \| D3DCLEAR_ZBUFFER, clear_col_dx, 1.0f, 0);
	if (g_pd3dDevice->BeginScene() >= 0)
	{
	ImGui::Render();
	g_pd3dDevice->EndScene();
	}
	g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
	}

	ImGui::Shutdown();

	UnregisterClass(L"ImGui Example", wc.hInstance);
	return 0;
	}