Added OpenGL and DirectX9 example applications

examples/directx9_example/directx9_example.sln

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+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "directx9_example", "directx9_example.vcxproj", "{4165A294-21F2-44CA-9B38-E3F935ABADF5}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Release|Win32 = Release|Win32
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4165A294-21F2-44CA-9B38-E3F935ABADF5}.Debug|Win32.ActiveCfg = Debug|Win32
+		{4165A294-21F2-44CA-9B38-E3F935ABADF5}.Debug|Win32.Build.0 = Debug|Win32
+		{4165A294-21F2-44CA-9B38-E3F935ABADF5}.Release|Win32.ActiveCfg = Release|Win32
+		{4165A294-21F2-44CA-9B38-E3F935ABADF5}.Release|Win32.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

examples/directx9_example/directx9_example.vcxproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{4165A294-21F2-44CA-9B38-E3F935ABADF5}</ProjectGuid>
+    <RootNamespace>directx9_example</RootNamespace>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>$(DXSDK_DIR)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalLibraryDirectories>$(DXSDK_DIR)Lib\x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>d3d9.lib;d3dx9d.lib;dxerr.lib;dxguid.lib;winmm.lib;comctl32.lib;gdi32.lib;user32.lib</AdditionalDependencies>
+      <SubSystem>
+      </SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <AdditionalIncludeDirectories>$(DXSDK_DIR)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <AdditionalLibraryDirectories>$(DXSDK_DIR)Lib\x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>d3d9.lib;d3dx9d.lib;dxerr.lib;dxguid.lib;winmm.lib;comctl32.lib;gdi32.lib;user32.lib</AdditionalDependencies>
+      <SubSystem>
+      </SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\imgui.cpp" />
+    <ClCompile Include="main.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\imconfig.h" />
+    <ClInclude Include="..\..\imgui.h" />
+    <ClInclude Include="..\..\stb_textedit.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\LICENSE" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

examples/directx9_example/directx9_example.vcxproj.filters

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="imgui">
+      <UniqueIdentifier>{ac86c4ce-1d96-47a9-9ace-f8970c3bd485}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="sources">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="main.cpp">
+      <Filter>sources</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\imgui.cpp">
+      <Filter>imgui</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\imconfig.h">
+      <Filter>imgui</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\imgui.h">
+      <Filter>imgui</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\stb_textedit.h">
+      <Filter>imgui</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\LICENSE">
+      <Filter>imgui</Filter>
+    </None>
+  </ItemGroup>
+</Project>

examples/directx9_example/main.cpp

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+#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;
+}

examples/opengl_example/glew/LICENSE.txt

@@ -0,0 +1,73 @@
+The OpenGL Extension Wrangler Library
+Copyright (C) 2002-2007, Milan Ikits <milan ikits[]ieee org>
+Copyright (C) 2002-2007, Marcelo E. Magallon <mmagallo[]debian org>
+Copyright (C) 2002, Lev Povalahev
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without 
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, 
+  this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above copyright notice, 
+  this list of conditions and the following disclaimer in the documentation 
+  and/or other materials provided with the distribution.
+* The name of the author may be used to endorse or promote products 
+  derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.
+
+
+Mesa 3-D graphics library
+Version:  7.0
+
+Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+Copyright (c) 2007 The Khronos Group Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and/or associated documentation files (the
+"Materials"), to deal in the Materials without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Materials, and to
+permit persons to whom the Materials are furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Materials.
+
+THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.

examples/opengl_example/glew/README.txt

@@ -0,0 +1,18 @@
+See doc/index.html for more information.
+
+If you downloaded the tarball from the GLEW website, you just need to:
+
+    Unix:
+
+        make
+
+    Windows:
+
+        use the project file in build/vc6/
+
+If you wish to build GLEW from scratch (update the extension data from
+the net or add your own extension information), you need a Unix
+environment (including wget, perl, and GNU make).  The extension data
+is regenerated from the top level source directory with:
+
+        make extensions

examples/opengl_example/glew/TODO.txt

@@ -0,0 +1,12 @@
+Major:
+ - add support for windows mini-client drivers
+ - add windows installer (msi)
+ - separate build of static and shared object files (for mingw and
+ cygwin)
+ - start designing GLEW 2.0
+
+Minor:
+ - make auto scripts work with text mode cygwin mounts
+ - add support for all SUN, MTX, and OML extensions
+ - make auto/Makefile more robust against auto/core/*~ mistakes
+ - web poll on separating glew, glxew and wglew

examples/opengl_example/glfw/COPYING.txt

@@ -0,0 +1,22 @@
+Copyright (c) 2002-2006 Marcus Geelnard
+Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would
+   be appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and must not
+   be misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source
+   distribution.
+

examples/opengl_example/glfw/include/GLFW/glfw3native.h

@@ -0,0 +1,180 @@
+/*************************************************************************
+ * GLFW 3.0 - www.glfw.org
+ * A library for OpenGL, window and input
+ *------------------------------------------------------------------------
+ * Copyright (c) 2002-2006 Marcus Geelnard
+ * Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would
+ *    be appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not
+ *    be misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ *    distribution.
+ *
+ *************************************************************************/
+
+#ifndef _glfw3_native_h_
+#define _glfw3_native_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*************************************************************************
+ * Doxygen documentation
+ *************************************************************************/
+
+/*! @defgroup native Native access
+ *
+ *  **By using the native API, you assert that you know what you're doing and
+ *  how to fix problems caused by using it.  If you don't, you shouldn't be
+ *  using it.**
+ *
+ *  Before the inclusion of @ref glfw3native.h, you must define exactly one
+ *  window API macro and exactly one context API macro.  Failure to do this
+ *  will cause a compile-time error.
+ *
+ *  The available window API macros are:
+ *  * `GLFW_EXPOSE_NATIVE_WIN32`
+ *  * `GLFW_EXPOSE_NATIVE_COCOA`
+ *  * `GLFW_EXPOSE_NATIVE_X11`
+ *
+ *  The available context API macros are:
+ *  * `GLFW_EXPOSE_NATIVE_WGL`
+ *  * `GLFW_EXPOSE_NATIVE_NSGL`
+ *  * `GLFW_EXPOSE_NATIVE_GLX`
+ *  * `GLFW_EXPOSE_NATIVE_EGL`
+ *
+ *  These macros select which of the native access functions that are declared
+ *  and which platform-specific headers to include.  It is then up your (by
+ *  definition platform-specific) code to handle which of these should be
+ *  defined.
+ */
+
+
+/*************************************************************************
+ * System headers and types
+ *************************************************************************/
+
+#if defined(GLFW_EXPOSE_NATIVE_WIN32)
+ #include <windows.h>
+#elif defined(GLFW_EXPOSE_NATIVE_COCOA)
+ #if defined(__OBJC__)
+  #import <Cocoa/Cocoa.h>
+ #else
+  typedef void* id;
+ #endif
+#elif defined(GLFW_EXPOSE_NATIVE_X11)
+ #include <X11/Xlib.h>
+#else
+ #error "No window API specified"
+#endif
+
+#if defined(GLFW_EXPOSE_NATIVE_WGL)
+ /* WGL is declared by windows.h */
+#elif defined(GLFW_EXPOSE_NATIVE_NSGL)
+ /* NSGL is declared by Cocoa.h */
+#elif defined(GLFW_EXPOSE_NATIVE_GLX)
+ #include <GL/glx.h>
+#elif defined(GLFW_EXPOSE_NATIVE_EGL)
+ #include <EGL/egl.h>
+#else
+ #error "No context API specified"
+#endif
+
+
+/*************************************************************************
+ * Functions
+ *************************************************************************/
+
+#if defined(GLFW_EXPOSE_NATIVE_WIN32)
+/*! @brief Returns the `HWND` of the specified window.
+ *  @return The `HWND` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI HWND glfwGetWin32Window(GLFWwindow* window);
+#endif
+
+#if defined(GLFW_EXPOSE_NATIVE_WGL)
+/*! @brief Returns the `HGLRC` of the specified window.
+ *  @return The `HGLRC` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI HGLRC glfwGetWGLContext(GLFWwindow* window);
+#endif
+
+#if defined(GLFW_EXPOSE_NATIVE_COCOA)
+/*! @brief Returns the `NSWindow` of the specified window.
+ *  @return The `NSWindow` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI id glfwGetCocoaWindow(GLFWwindow* window);
+#endif
+
+#if defined(GLFW_EXPOSE_NATIVE_NSGL)
+/*! @brief Returns the `NSOpenGLContext` of the specified window.
+ *  @return The `NSOpenGLContext` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI id glfwGetNSGLContext(GLFWwindow* window);
+#endif
+
+#if defined(GLFW_EXPOSE_NATIVE_X11)
+/*! @brief Returns the `Display` used by GLFW.
+ *  @return The `Display` used by GLFW.
+ *  @ingroup native
+ */
+GLFWAPI Display* glfwGetX11Display(void);
+/*! @brief Returns the `Window` of the specified window.
+ *  @return The `Window` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI Window glfwGetX11Window(GLFWwindow* window);
+#endif
+
+#if defined(GLFW_EXPOSE_NATIVE_GLX)
+/*! @brief Returns the `GLXContext` of the specified window.
+ *  @return The `GLXContext` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* window);
+#endif
+
+#if defined(GLFW_EXPOSE_NATIVE_EGL)
+/*! @brief Returns the `EGLDisplay` used by GLFW.
+ *  @return The `EGLDisplay` used by GLFW.
+ *  @ingroup native
+ */
+GLFWAPI EGLDisplay glfwGetEGLDisplay(void);
+/*! @brief Returns the `EGLContext` of the specified window.
+ *  @return The `EGLContext` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI EGLContext glfwGetEGLContext(GLFWwindow* window);
+/*! @brief Returns the `EGLSurface` of the specified window.
+ *  @return The `EGLSurface` of the specified window.
+ *  @ingroup native
+ */
+GLFWAPI EGLSurface glfwGetEGLSurface(GLFWwindow* window);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _glfw3_native_h_ */
+

examples/opengl_example/main.cpp

@@ -0,0 +1,402 @@
+#define GLEW_STATIC
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"				// for .png loading
+#include "../../imgui.h"
+#ifdef _MSC_VER
+#pragma warning (disable: 4996)		// 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
+#endif
+
+static GLFWwindow* window;
+static GLuint vbo;
+static GLuint vao;
+static GLuint vertexShader;
+static GLuint fragmentShader;
+static GLuint shaderProgram;
+static GLuint fontTex;
+static GLint uniMVP;
+static GLint uniClipRect;
+
+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;
+
+	int read_pos_clip_rect_buf = 0;		// offset in 'clip_rect_buffer'. each PushClipRect command consume 1 of those.
+
+	ImVector<ImVec4> clip_rect_stack;
+	clip_rect_stack.push_back(ImVec4(-9999,-9999,+9999,+9999));
+
+	// Setup orthographic projection
+	const float L = 0.0f;
+	const float R = ImGui::GetIO().DisplaySize.x;
+	const float B = ImGui::GetIO().DisplaySize.y;
+	const float T = 0.0f;
+	const float mvp[4][4] = 
+	{
+		{ 2.0f/(R-L),	0.0f,			0.0f,		0.0f },
+		{ 0.0f,			2.0f/(T-B),		0.0f,		0.0f },
+		{ 0.0f,			0.0f,			-1.0f,		0.0f },
+		{ -(R+L)/(R-L),	-(T+B)/(T-B),	0.0f,		1.0f },
+	};
+
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBindVertexArray(vao);
+	glBufferData(GL_ARRAY_BUFFER, total_vtx_count * sizeof(ImDrawVert), NULL, GL_STREAM_DRAW);
+	unsigned char* buffer_data = (unsigned char*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
+	if (!buffer_data)
+		return;
+	int vtx_consumed = 0;
+	for (int n = 0; n < cmd_lists_count; n++)
+	{
+		const ImDrawList* cmd_list = cmd_lists[n];
+		if (!cmd_list->vtx_buffer.empty())
+		{
+			memcpy(buffer_data, &cmd_list->vtx_buffer[0], cmd_list->vtx_buffer.size() * sizeof(ImDrawVert));
+			buffer_data += cmd_list->vtx_buffer.size() * sizeof(ImDrawVert);
+			vtx_consumed += cmd_list->vtx_buffer.size();
+		}
+	}
+	glUnmapBuffer(GL_ARRAY_BUFFER);
+	
+	glUseProgram(shaderProgram);
+	glUniformMatrix4fv(uniMVP, 1, GL_FALSE, &mvp[0][0]);
+
+	// Setup render state: alpha-blending enabled, no face culling, no depth testing
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	glDisable(GL_CULL_FACE);
+	glDisable(GL_DEPTH_TEST);
+
+	glBindTexture(GL_TEXTURE_2D, fontTex);
+
+	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)
+				{
+					glUniform4fv(uniClipRect, 1, (float*)&clip_rect_stack.back());
+					clip_rect_dirty = false;
+				}
+				glDrawArrays(GL_TRIANGLES, vtx_consumed, cmd.vtx_count);
+				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;
+			}
+		}
+	}
+}
+
+static const char* ImImpl_GetClipboardTextFn()
+{
+	return glfwGetClipboardString(window);
+}
+
+static void ImImpl_SetClipboardTextFn(const char* text, const char* text_end)
+{
+	if (!text_end)
+		text_end = text + strlen(text);
+
+	char* buf = (char*)malloc(text_end - text + 1);
+	memcpy(buf, text, text_end-text);
+	buf[text_end-text] = '\0';
+	glfwSetClipboardString(window, buf);
+	free(buf);
+}
+
+// Shader sources
+// FIXME-OPT: clip at vertex level
+const GLchar* vertexSource =
+    "#version 150 core\n"
+	"uniform mat4 MVP;"
+    "in vec2 i_pos;"
+	"in vec2 i_uv;"
+	"in vec4 i_col;"
+	"out vec4 col;"
+	"out vec2 pixel_pos;"
+	"out vec2 uv;"
+    "void main() {"
+	"   col = i_col;"
+	"   pixel_pos = i_pos;"
+	"   uv = i_uv;"
+	"   gl_Position = MVP * vec4(i_pos.x, i_pos.y, 0.0f, 1.0f);"
+    "}";
+
+const GLchar* fragmentSource =
+    "#version 150 core\n"
+	"uniform sampler2D Tex;"
+	"uniform vec4 ClipRect;"
+	"in vec4 col;"
+	"in vec2 pixel_pos;"
+	"in vec2 uv;"
+    "out vec4 o_col;"
+    "void main() {"
+    "   o_col = texture(Tex, uv) * col;"
+	//"   if (pixel_pos.x < ClipRect.x || pixel_pos.y < ClipRect.y || pixel_pos.x > ClipRect.z || pixel_pos.y > ClipRect.w) discard;"						// Clipping: using discard	
+	//"   if (step(ClipRect.x,pixel_pos.x) * step(ClipRect.y,pixel_pos.y) * step(pixel_pos.x,ClipRect.z) * step(pixel_pos.y,ClipRect.w) < 1.0f) discard;"	// Clipping: using discard and step
+	"   o_col.w *= (step(ClipRect.x,pixel_pos.x) * step(ClipRect.y,pixel_pos.y) * step(pixel_pos.x,ClipRect.z) * step(pixel_pos.y,ClipRect.w));"			// Clipping: branch-less, set alpha 0.0f
+    "}";
+
+static void glfw_error_callback(int error, const char* description)
+{
+    fputs(description, stderr);
+}
+
+static float mouse_wheel = 0.0f;
+static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
+{
+	mouse_wheel = (float)yoffset;
+}
+
+static void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+	ImGuiIO& io = ImGui::GetIO();
+	if (action == GLFW_PRESS)
+		io.KeysDown[key] = true;
+	if (action == GLFW_RELEASE)
+		io.KeysDown[key] = false;
+	io.KeyCtrl = (mods & GLFW_MOD_CONTROL) != 0;
+	io.KeyShift = (mods & GLFW_MOD_SHIFT) != 0;
+}
+
+static void glfw_char_callback(GLFWwindow* window, unsigned int c)
+{
+	if (c > 0 && c <= 255)
+		ImGui::GetIO().AddInputCharacter((char)c);
+}
+
+// OpenGL code based on http://open.gl tutorials
+void InitGL()
+{
+	glfwSetErrorCallback(glfw_error_callback);
+
+    if (!glfwInit())
+        exit(1);
+
+	//glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	//glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
+	//glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+	//glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+	glfwWindowHint(GLFW_REFRESH_RATE, 60);
+	glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+	window = glfwCreateWindow(1280, 720, "ImGui OpenGL example", nullptr, nullptr);
+	glfwMakeContextCurrent(window);
+
+	glfwSetKeyCallback(window, glfw_key_callback);
+	glfwSetScrollCallback(window, glfw_scroll_callback);
+	glfwSetCharCallback(window, glfw_char_callback);
+
+	glewExperimental = GL_TRUE;
+	glewInit();
+
+	GLenum err = GL_NO_ERROR;
+	GLint status = GL_TRUE;
+	err = glGetError(); IM_ASSERT(err == GL_NO_ERROR);
+
+    // Create and compile the vertex shader
+    vertexShader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vertexShader, 1, &vertexSource, NULL);
+    glCompileShader(vertexShader);
+	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &status);
+	if (status != GL_TRUE)
+	{
+		char buffer[512];
+		glGetShaderInfoLog(vertexShader, 1024, NULL, buffer);
+		printf("%s", buffer);
+		IM_ASSERT(status == GL_TRUE);
+	}
+
+    // Create and compile the fragment shader
+    fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fragmentShader, 1, &fragmentSource, NULL);
+    glCompileShader(fragmentShader);
+	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &status);
+	IM_ASSERT(status == GL_TRUE);
+
+    // Link the vertex and fragment shader into a shader program
+    shaderProgram = glCreateProgram();
+    glAttachShader(shaderProgram, vertexShader);
+    glAttachShader(shaderProgram, fragmentShader);
+    glBindFragDataLocation(shaderProgram, 0, "o_col");
+    glLinkProgram(shaderProgram);
+	glGetProgramiv(shaderProgram, GL_LINK_STATUS, &status);
+	IM_ASSERT(status == GL_TRUE);
+
+	uniMVP = glGetUniformLocation(shaderProgram, "MVP");
+	uniClipRect = glGetUniformLocation(shaderProgram, "ClipRect");
+
+	// Create Vertex Buffer Objects & Vertex Array Objects
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+	
+	GLint posAttrib = glGetAttribLocation(shaderProgram, "i_pos");
+	glVertexAttribPointer(posAttrib, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), 0);
+	glEnableVertexAttribArray(posAttrib);
+
+	GLint uvAttrib = glGetAttribLocation(shaderProgram, "i_uv");
+	glEnableVertexAttribArray(uvAttrib);
+	glVertexAttribPointer(uvAttrib, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (void*)(2*sizeof(float)));
+
+	GLint colAttrib = glGetAttribLocation(shaderProgram, "i_col");
+	glVertexAttribPointer(colAttrib, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (void*)(4*sizeof(float)));
+	glEnableVertexAttribArray(colAttrib);
+	err = glGetError(); IM_ASSERT(err == GL_NO_ERROR);
+}
+
+void InitImGui()
+{
+	int w, h;
+	glfwGetWindowSize(window, &w, &h);
+
+	ImGuiIO& io = ImGui::GetIO();
+	io.DisplaySize = ImVec2((float)w, (float)h);
+	io.DeltaTime = 1.0f/60.0f;
+	io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB;
+	io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
+	io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
+	io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
+	io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
+	io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
+	io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
+	io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
+	io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
+	io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
+	io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
+	io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
+	io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
+	io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
+	io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
+	io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
+	io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
+
+	io.RenderDrawListsFn = ImImpl_RenderDrawLists;
+	io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
+	io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
+
+	// Load font texture
+	glGenTextures(1, &fontTex);
+	glBindTexture(GL_TEXTURE_2D, fontTex);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	const void* png_data;
+	unsigned int png_size;
+	ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size);
+	int tex_x, tex_y, tex_comp;
+	void* tex_data = stbi_load_from_memory((const unsigned char*)png_data, (int)png_size, &tex_x, &tex_y, &tex_comp, 0);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_x, tex_y, 0, GL_RGBA, GL_UNSIGNED_BYTE, tex_data);
+	stbi_image_free(tex_data);
+}
+
+void Shutdown()
+{
+	ImGui::Shutdown();
+
+    glDeleteProgram(shaderProgram);
+    glDeleteShader(fragmentShader);
+    glDeleteShader(vertexShader);
+    glDeleteBuffers(1, &vbo);
+    glDeleteVertexArrays(1, &vao);
+
+	glfwTerminate();
+}
+
+int main(int argc, char** argv)
+{
+	InitGL();
+	InitImGui();
+
+	double time = glfwGetTime();
+	while (!glfwWindowShouldClose(window))
+	{
+		ImGuiIO& io = ImGui::GetIO();
+		glfwPollEvents();
+
+		// 1) ImGui start frame, setup time delta & inputs
+		const double current_time =  glfwGetTime();
+		io.DeltaTime = (float)(current_time - time);
+		time = current_time;
+		double mouse_x, mouse_y;
+		glfwGetCursorPos(window, &mouse_x, &mouse_y);
+		io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);
+		io.MouseDown[0] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0;
+		io.MouseDown[1] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
+		io.MouseWheel = (mouse_wheel != 0) ? mouse_wheel > 0.0f ? 1 : - 1 : 0;
+		mouse_wheel = 0.0f;
+		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
+        glClearColor(0.8f, 0.6f, 0.6f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+		ImGui::Render();
+
+		glfwSwapBuffers(window);
+	}
+
+	Shutdown();
+
+	return 0;
+}

examples/opengl_example/opengl_example.sln

@@ -0,0 +1,20 @@
+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "opengl_example", "opengl_example.vcxproj", "{9CDA7840-B7A5-496D-A527-E95571496D18}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Release|Win32 = Release|Win32
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{9CDA7840-B7A5-496D-A527-E95571496D18}.Debug|Win32.ActiveCfg = Debug|Win32
+		{9CDA7840-B7A5-496D-A527-E95571496D18}.Debug|Win32.Build.0 = Debug|Win32
+		{9CDA7840-B7A5-496D-A527-E95571496D18}.Release|Win32.ActiveCfg = Release|Win32
+		{9CDA7840-B7A5-496D-A527-E95571496D18}.Release|Win32.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

examples/opengl_example/opengl_example.vcxproj

@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{9CDA7840-B7A5-496D-A527-E95571496D18}</ProjectGuid>
+    <RootNamespace>opengl_example</RootNamespace>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>$(SolutionDir)\glfw\include;$(SolutionDir)\glew\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalLibraryDirectories>$(SolutionDir)\glfw\lib-msvc100;$(SolutionDir)\glew\lib\Release\Win32;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>opengl32.lib;glfw3.lib;glew32s.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <SubSystem>NotSet</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <AdditionalIncludeDirectories>$(SolutionDir)\glfw\include;$(SolutionDir)\glew\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <AdditionalLibraryDirectories>$(SolutionDir)\glfw\lib-msvc100;$(SolutionDir)\glew\lib\Release\Win32;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>opengl32.lib;glfw3.lib;glew32s.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <SubSystem>NotSet</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\imgui.cpp" />
+    <ClCompile Include="main.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\imconfig.h" />
+    <ClInclude Include="..\..\imgui.h" />
+    <ClInclude Include="..\..\stb_textedit.h" />
+    <ClInclude Include="stb_image.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\LICENSE" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

examples/opengl_example/opengl_example.vcxproj.filters

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="imgui">
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+    </Filter>
+    <Filter Include="sources">
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+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="main.cpp">
+      <Filter>sources</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\imgui.cpp">
+      <Filter>imgui</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="stb_image.h">
+      <Filter>sources</Filter>
+    </ClInclude>
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+      <Filter>imgui</Filter>
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+      <Filter>imgui</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\stb_textedit.h">
+      <Filter>imgui</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\LICENSE">
+      <Filter>imgui</Filter>
+    </None>
+  </ItemGroup>
+</Project>