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

 #include <windows.h>
 #include <mmsystem.h>
 #include <d3dx9.h>
 #define DIRECTINPUT_VERSION 0x0800
 #include <dinput.h>
 #include "../../imgui.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
 static LPDIRECT3DTEXTURE9      g_pTexture = NULL;	// Our texture

 struct CUSTOMVERTEX
 {
     D3DXVECTOR3	position;
     D3DCOLOR	color;
     float		tu, tv;
 };

 #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE|D3DFVF_TEX1)

 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;

 	ImVector<ImVec4> clip_rect_stack;
 	clip_rect_stack.push_back(ImVec4(-9999,-9999,+9999,+9999));

 	// Setup orthographic projection
 	// Set up world matrix
 	D3DXMATRIXA16 mat;
 	D3DXMatrixIdentity(&mat);
 	g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat);
 	g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat);
 	D3DXMatrixOrthoOffCenterLH(&mat, 0.0f, ImGui::GetIO().DisplaySize.x, ImGui::GetIO().DisplaySize.y, 0.0f, -1.0f, +1.0f);
 	g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat);

 	D3DSURFACE_DESC texture_desc;
 	g_pTexture->GetLevelDesc(0, &texture_desc);

     // Fill the vertex buffer
     CUSTOMVERTEX* vtx_dst;
     if (g_pVB->Lock(0, 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];
 		if (cmd_list->commands.empty() || cmd_list->vtx_buffer.empty())
 			continue;
 		const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
 		for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
 		{
 			vtx_dst->position.x = vtx_src->pos.x;
 			vtx_dst->position.y = vtx_src->pos.y;
 			vtx_dst->position.z = 0.0f;
 			vtx_dst->color = (vtx_src->col & 0xFF00FF00) | ((vtx_src->col & 0xFF0000)>>16) | ((vtx_src->col & 0xFF) << 16);		// RGBA --> ARGB for DirectX9
 			vtx_dst->tu = vtx_src->uv.x;
 			vtx_dst->tv = 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 enabled, 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 );

 	// Setup texture
 	g_pd3dDevice->SetTexture( 0, g_pTexture );
 	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
 	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
 	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, 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 );

 	int vtx_consumed = 0;					// offset in vertex buffer. each command consume ImDrawCmd::vtx_count of those
 	bool clip_rect_dirty = true;

 	for (int n = 0; n < cmd_lists_count; n++)
 	{
 		const ImDrawList* cmd_list = cmd_lists[n];
 		if (cmd_list->commands.empty() || cmd_list->vtx_buffer.empty())
 			continue;
 		const ImDrawCmd* pcmd = &cmd_list->commands.front();
 		const ImDrawCmd* pcmd_end = &cmd_list->commands.back();
 		int clip_rect_buf_consumed = 0;		// offset in cmd_list->clip_rect_buffer. each PushClipRect command consume 1 of those.
 		while (pcmd <= pcmd_end)
 		{
 			const ImDrawCmd& cmd = *pcmd++;
 			switch (cmd.cmd_type)
 			{
 			case ImDrawCmdType_DrawTriangleList:
 				if (clip_rect_dirty)
 				{
 					const ImVec4& clip_rect = clip_rect_stack.back();
 					const RECT r = { (LONG)clip_rect.x, (LONG)clip_rect.y, (LONG)clip_rect.z, (LONG)clip_rect.w };
 					g_pd3dDevice->SetScissorRect(&r);
 					clip_rect_dirty = false;
 				}
 				g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_consumed, cmd.vtx_count/3);
 				vtx_consumed += cmd.vtx_count;
 				break;

 			case ImDrawCmdType_PushClipRect:
 				clip_rect_stack.push_back(cmd_list->clip_rect_buffer[clip_rect_buf_consumed++]);
 				clip_rect_dirty = true;
 				break;

 			case ImDrawCmdType_PopClipRect:
 				clip_rect_stack.pop_back();
 				clip_rect_dirty = true;
 				break;
 			}
 		}
 	}
 }

 // Get text data in Win32 clipboard
 static const char* ImImpl_GetClipboardTextFn()
 {
 	static char* buf_local = NULL;
 	if (buf_local)
 	{
 		free(buf_local);
 		buf_local = NULL;
 	}

 	if (!OpenClipboard(NULL))
 		return NULL;

 	HANDLE buf_handle = GetClipboardData(CF_TEXT);
 	if (buf_handle == NULL)
 		return NULL;

 	if (char* buf_global = (char*)GlobalLock(buf_handle))
 		buf_local = strdup(buf_global);
 	GlobalUnlock(buf_handle);
 	CloseClipboard();

 	return buf_local;
 }

 // Set text data in Win32 clipboard
 static void ImImpl_SetClipboardTextFn(const char* text, const char* text_end)
 {
 	if (!OpenClipboard(NULL))
 		return;

 	if (!text_end)
 		text_end = text + strlen(text);

 	const int buf_length = (text_end - text) + 1;
 	HGLOBAL buf_handle = GlobalAlloc(GMEM_MOVEABLE, buf_length * sizeof(char));
 	if (buf_handle == NULL)
 		return;

 	char* buf_global = (char *)GlobalLock(buf_handle);
 	memcpy(buf_global, text, text_end - text);
 	buf_global[text_end - text] = 0;
 	GlobalUnlock(buf_handle);

 	EmptyClipboard();
 	SetClipboardData(CF_TEXT, buf_handle);
 	CloseClipboard();
 }

 HRESULT InitD3D(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;

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

 	// Load font texture
 	const void* png_data;
 	unsigned int png_size;
 	ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size);
 	if (D3DXCreateTextureFromFileInMemory(g_pd3dDevice, png_data, png_size, &g_pTexture) < 0)
 		return E_FAIL;

     return S_OK;
 }

 void Cleanup()
 {
     if (g_pTexture != NULL)
         g_pTexture->Release();

     if (g_pd3dDevice != NULL)
         g_pd3dDevice->Release();

     if (g_pD3D != NULL)
         g_pD3D->Release();
 }

 LRESULT WINAPI MsgProc(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 : -1;
 		return true;
 	case WM_MOUSEMOVE:
 		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 > 1 && wParam < 256)
 			io.AddInputCharacter((char)wParam);
 		return true;
 	case WM_DESTROY:
 		{
 			Cleanup();
 			PostQuitMessage(0);
 			return 0;
 		}
 	}
     return DefWindowProc(hWnd, msg, wParam, lParam);
 }

 void InitImGui()
 {
 	RECT rect;
 	GetClientRect(hWnd, &rect);

 	ImGuiIO& io = ImGui::GetIO();
 	io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
 	io.DeltaTime = 1.0f/60.0f;
 	io.KeyMap[ImGuiKey_Tab] = VK_TAB;
 	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;
 	io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
 	io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
 }

 int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
 {
     // Register the window class
     WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, 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);

 	INT64 ticks_per_second, time;
 	if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
 		return 1;
 	if (!QueryPerformanceCounter((LARGE_INTEGER *)&time))
 		return 1;

 	// Initialize Direct3D
     if (InitD3D(hWnd) >= 0)
     {
         // Show the window
         ShowWindow(hWnd, SW_SHOWDEFAULT);
         UpdateWindow(hWnd);

 		InitImGui();

         // 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;
             }

 			// 1) ImGui start frame, setup time delta & inputs
 			ImGuiIO& io = ImGui::GetIO();
 			INT64 current_time;
 			QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
 			io.DeltaTime = (float)(current_time - time) / ticks_per_second;
 			time = current_time;
 			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
 			ImGui::NewFrame();

 			// 2) ImGui usage
 			static bool show_test_window = true;
 			static bool show_another_window = false;
 			static float f;
 			ImGui::Text("Hello, world!");
 			ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
 			show_test_window ^= ImGui::Button("Test Window");
 			show_another_window ^= ImGui::Button("Another Window");

 			// Calculate and show framerate
 			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] = io.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);

 			if (show_test_window)
 			{
 				// More example code in ShowTestWindow()
 				ImGui::SetNewWindowDefaultPos(ImVec2(650, 20));		// Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
 				ImGui::ShowTestWindow(&show_test_window);
 			}

 			if (show_another_window)
 			{
 				ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
 				ImGui::Text("Hello");
 				ImGui::End();
 			}

 			// 3) Render
 		    g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
 			g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
 			g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
 			g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(204, 153, 153), 1.0f, 0);	// Clear the backbuffer and the zbuffer
 			if (g_pd3dDevice->BeginScene() >= 0)
 			{
 				ImGui::Render();
 				g_pd3dDevice->EndScene();
 			}
 		    g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
 		}

 		ImGui::Shutdown();
     }

 	if (g_pVB)
 		g_pVB->Release();

     UnregisterClass(L"ImGui Example", wc.hInstance);
     return 0;
 }
	#include <windows.h>
	#include <mmsystem.h>
	#include <d3dx9.h>
	#define DIRECTINPUT_VERSION 0x0800
	#include <dinput.h>
	#include "../../imgui.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
	static LPDIRECT3DTEXTURE9 g_pTexture = NULL; // Our texture

	struct CUSTOMVERTEX
	{
	D3DXVECTOR3 position;
	D3DCOLOR color;
	float tu, tv;
	};

	#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ\|D3DFVF_DIFFUSE\|D3DFVF_TEX1)

	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;

	ImVector<ImVec4> clip_rect_stack;
	clip_rect_stack.push_back(ImVec4(-9999,-9999,+9999,+9999));

	// Setup orthographic projection
	// Set up world matrix
	D3DXMATRIXA16 mat;
	D3DXMatrixIdentity(&mat);
	g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat);
	g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat);
	D3DXMatrixOrthoOffCenterLH(&mat, 0.0f, ImGui::GetIO().DisplaySize.x, ImGui::GetIO().DisplaySize.y, 0.0f, -1.0f, +1.0f);
	g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat);

	D3DSURFACE_DESC texture_desc;
	g_pTexture->GetLevelDesc(0, &texture_desc);

	// Fill the vertex buffer
	CUSTOMVERTEX* vtx_dst;
	if (g_pVB->Lock(0, 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];
	if (cmd_list->commands.empty() \|\| cmd_list->vtx_buffer.empty())
	continue;
	const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
	for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
	{
	vtx_dst->position.x = vtx_src->pos.x;
	vtx_dst->position.y = vtx_src->pos.y;
	vtx_dst->position.z = 0.0f;
	vtx_dst->color = (vtx_src->col & 0xFF00FF00) \| ((vtx_src->col & 0xFF0000)>>16) \| ((vtx_src->col & 0xFF) << 16); // RGBA --> ARGB for DirectX9
	vtx_dst->tu = vtx_src->uv.x;
	vtx_dst->tv = 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 enabled, 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 );

	// Setup texture
	g_pd3dDevice->SetTexture( 0, g_pTexture );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
	g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, 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 );

	int vtx_consumed = 0; // offset in vertex buffer. each command consume ImDrawCmd::vtx_count of those
	bool clip_rect_dirty = true;

	for (int n = 0; n < cmd_lists_count; n++)
	{
	const ImDrawList* cmd_list = cmd_lists[n];
	if (cmd_list->commands.empty() \|\| cmd_list->vtx_buffer.empty())
	continue;
	const ImDrawCmd* pcmd = &cmd_list->commands.front();
	const ImDrawCmd* pcmd_end = &cmd_list->commands.back();
	int clip_rect_buf_consumed = 0; // offset in cmd_list->clip_rect_buffer. each PushClipRect command consume 1 of those.
	while (pcmd <= pcmd_end)
	{
	const ImDrawCmd& cmd = *pcmd++;
	switch (cmd.cmd_type)
	{
	case ImDrawCmdType_DrawTriangleList:
	if (clip_rect_dirty)
	{
	const ImVec4& clip_rect = clip_rect_stack.back();
	const RECT r = { (LONG)clip_rect.x, (LONG)clip_rect.y, (LONG)clip_rect.z, (LONG)clip_rect.w };
	g_pd3dDevice->SetScissorRect(&r);
	clip_rect_dirty = false;
	}
	g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_consumed, cmd.vtx_count/3);
	vtx_consumed += cmd.vtx_count;
	break;

	case ImDrawCmdType_PushClipRect:
	clip_rect_stack.push_back(cmd_list->clip_rect_buffer[clip_rect_buf_consumed++]);
	clip_rect_dirty = true;
	break;

	case ImDrawCmdType_PopClipRect:
	clip_rect_stack.pop_back();
	clip_rect_dirty = true;
	break;
	}
	}
	}
	}

	// Get text data in Win32 clipboard
	static const char* ImImpl_GetClipboardTextFn()
	{
	static char* buf_local = NULL;
	if (buf_local)
	{
	free(buf_local);
	buf_local = NULL;
	}

	if (!OpenClipboard(NULL))
	return NULL;

	HANDLE buf_handle = GetClipboardData(CF_TEXT);
	if (buf_handle == NULL)
	return NULL;

	if (char* buf_global = (char*)GlobalLock(buf_handle))
	buf_local = strdup(buf_global);
	GlobalUnlock(buf_handle);
	CloseClipboard();

	return buf_local;
	}

	// Set text data in Win32 clipboard
	static void ImImpl_SetClipboardTextFn(const char* text, const char* text_end)
	{
	if (!OpenClipboard(NULL))
	return;

	if (!text_end)
	text_end = text + strlen(text);

	const int buf_length = (text_end - text) + 1;
	HGLOBAL buf_handle = GlobalAlloc(GMEM_MOVEABLE, buf_length * sizeof(char));
	if (buf_handle == NULL)
	return;

	char* buf_global = (char *)GlobalLock(buf_handle);
	memcpy(buf_global, text, text_end - text);
	buf_global[text_end - text] = 0;
	GlobalUnlock(buf_handle);

	EmptyClipboard();
	SetClipboardData(CF_TEXT, buf_handle);
	CloseClipboard();
	}

	HRESULT InitD3D(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;

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

	// Load font texture
	const void* png_data;
	unsigned int png_size;
	ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size);
	if (D3DXCreateTextureFromFileInMemory(g_pd3dDevice, png_data, png_size, &g_pTexture) < 0)
	return E_FAIL;

	return S_OK;
	}

	void Cleanup()
	{
	if (g_pTexture != NULL)
	g_pTexture->Release();

	if (g_pd3dDevice != NULL)
	g_pd3dDevice->Release();

	if (g_pD3D != NULL)
	g_pD3D->Release();
	}

	LRESULT WINAPI MsgProc(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 : -1;
	return true;
	case WM_MOUSEMOVE:
	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 > 1 && wParam < 256)
	io.AddInputCharacter((char)wParam);
	return true;
	case WM_DESTROY:
	{
	Cleanup();
	PostQuitMessage(0);
	return 0;
	}
	}
	return DefWindowProc(hWnd, msg, wParam, lParam);
	}

	void InitImGui()
	{
	RECT rect;
	GetClientRect(hWnd, &rect);

	ImGuiIO& io = ImGui::GetIO();
	io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
	io.DeltaTime = 1.0f/60.0f;
	io.KeyMap[ImGuiKey_Tab] = VK_TAB;
	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;
	io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
	io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
	}

	int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
	{
	// Register the window class
	WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, 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);

	INT64 ticks_per_second, time;
	if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
	return 1;
	if (!QueryPerformanceCounter((LARGE_INTEGER *)&time))
	return 1;

	// Initialize Direct3D
	if (InitD3D(hWnd) >= 0)
	{
	// Show the window
	ShowWindow(hWnd, SW_SHOWDEFAULT);
	UpdateWindow(hWnd);

	InitImGui();

	// 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;
	}

	// 1) ImGui start frame, setup time delta & inputs
	ImGuiIO& io = ImGui::GetIO();
	INT64 current_time;
	QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
	io.DeltaTime = (float)(current_time - time) / ticks_per_second;
	time = current_time;
	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
	ImGui::NewFrame();

	// 2) ImGui usage
	static bool show_test_window = true;
	static bool show_another_window = false;
	static float f;
	ImGui::Text("Hello, world!");
	ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
	show_test_window ^= ImGui::Button("Test Window");
	show_another_window ^= ImGui::Button("Another Window");

	// Calculate and show framerate
	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] = io.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);

	if (show_test_window)
	{
	// More example code in ShowTestWindow()
	ImGui::SetNewWindowDefaultPos(ImVec2(650, 20)); // Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
	ImGui::ShowTestWindow(&show_test_window);
	}

	if (show_another_window)
	{
	ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
	ImGui::Text("Hello");
	ImGui::End();
	}

	// 3) Render
	g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
	g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
	g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
	g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET \| D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(204, 153, 153), 1.0f, 0); // Clear the backbuffer and the zbuffer
	if (g_pd3dDevice->BeginScene() >= 0)
	{
	ImGui::Render();
	g_pd3dDevice->EndScene();
	}
	g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
	}

	ImGui::Shutdown();
	}

	if (g_pVB)
	g_pVB->Release();

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