Examples: DirectX9 example application handle window resizing.
diff --git a/examples/directx11_example/imgui_impl_dx11.cpp b/examples/directx11_example/imgui_impl_dx11.cpp
index bc693a4..c2e90ae 100644
--- a/examples/directx11_example/imgui_impl_dx11.cpp
+++ b/examples/directx11_example/imgui_impl_dx11.cpp
@@ -15,6 +15,7 @@
static INT64 g_TicksPerSecond = 0;
static bool g_FontTextureLoaded = false;
+static HWND g_hWnd = 0;
static ID3D11Device* g_pd3dDevice = NULL;
static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
static ID3D11Buffer* g_pVB = NULL;
@@ -355,6 +356,7 @@
bool ImGui_ImplDX11_Init(void* hwnd, ID3D11Device* device, ID3D11DeviceContext* device_context)
{
+ g_hWnd = (HWND)hwnd;
g_pd3dDevice = device;
g_pd3dDeviceContext = device_context;
@@ -369,14 +371,7 @@
if (!QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
return false;
- // FIXME: resizing
- RECT rect;
- GetClientRect((HWND)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.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;
@@ -396,7 +391,7 @@
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImGui_ImplDX11_RenderDrawLists;
- io.ImeWindowHandle = hwnd;
+ io.ImeWindowHandle = g_hWnd;
return true;
}
@@ -428,6 +423,11 @@
ImGuiIO& io = ImGui::GetIO();
+ // Setup display size (every frame to accommodate for window resizing)
+ RECT rect;
+ GetClientRect(g_hWnd, &rect);
+ io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
+
// Setup time step
INT64 current_time;
QueryPerformanceCounter((LARGE_INTEGER *)¤t_time);
diff --git a/examples/directx9_example/imgui_impl_dx9.cpp b/examples/directx9_example/imgui_impl_dx9.cpp
index ccddbe0..c69a8d2 100644
--- a/examples/directx9_example/imgui_impl_dx9.cpp
+++ b/examples/directx9_example/imgui_impl_dx9.cpp
@@ -10,6 +10,7 @@
#include <dinput.h>
// Data
+static HWND g_hWnd = 0;
static INT64 g_Time = 0;
static INT64 g_TicksPerSecond = 0;
static bool g_FontTextureLoaded = false;
@@ -177,20 +178,15 @@
bool ImGui_ImplDX9_Init(void* hwnd, IDirect3DDevice9* device)
{
+ g_hWnd = (HWND)hwnd;
g_pd3dDevice = device;
+
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
return false;
if (!QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
return false;
- // FIXME: resizing
- RECT rect;
- GetClientRect((HWND)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.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;
@@ -210,17 +206,18 @@
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImGui_ImplDX9_RenderDrawLists;
- io.ImeWindowHandle = hwnd;
+ io.ImeWindowHandle = g_hWnd;
- // Create the vertex buffer
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
return false;
return true;
}
-void ImGui_ImplDX9_Shutdown()
+void ImGui_ImplDX9_InvalidateDeviceObjects()
{
+ if (!g_pd3dDevice)
+ return;
if (g_pVB)
{
g_pVB->Release();
@@ -231,8 +228,24 @@
tex->Release();
ImGui::GetIO().Fonts->TexID = 0;
}
+}
+void ImGui_ImplDX9_CreateDeviceObjects()
+{
+ if (!g_pd3dDevice)
+ return;
+ if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
+ return;
+
+ ImGui_ImplDX9_InitFontsTexture();
+}
+
+void ImGui_ImplDX9_Shutdown()
+{
+ ImGui_ImplDX9_InvalidateDeviceObjects();
ImGui::Shutdown();
+ g_pd3dDevice = NULL;
+ g_hWnd = 0;
}
void ImGui_ImplDX9_NewFrame()
@@ -242,6 +255,11 @@
ImGuiIO& io = ImGui::GetIO();
+ // Setup display size (every frame to accommodate for window resizing)
+ RECT rect;
+ GetClientRect(g_hWnd, &rect);
+ io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
+
// Setup time step
INT64 current_time;
QueryPerformanceCounter((LARGE_INTEGER *)¤t_time);
diff --git a/examples/directx9_example/imgui_impl_dx9.h b/examples/directx9_example/imgui_impl_dx9.h
index 6574e3f..1822bee 100644
--- a/examples/directx9_example/imgui_impl_dx9.h
+++ b/examples/directx9_example/imgui_impl_dx9.h
@@ -8,6 +8,10 @@
void ImGui_ImplDX9_Shutdown();
void ImGui_ImplDX9_NewFrame();
+// Use if you want to reset your rendering device without losing ImGui state.
+void ImGui_ImplDX9_InvalidateDeviceObjects();
+void ImGui_ImplDX9_CreateDeviceObjects();
+
// Handler for Win32 messages, update mouse/keyboard data.
// You may or not need this for your implementation, but it can serve as reference for handling inputs.
// Commented out to avoid dragging dependencies on <windows.h> types. You can copy the extern declaration in your code.
diff --git a/examples/directx9_example/main.cpp b/examples/directx9_example/main.cpp
index 9224be5..2f2a618 100644
--- a/examples/directx9_example/main.cpp
+++ b/examples/directx9_example/main.cpp
@@ -1,5 +1,4 @@
// ImGui - standalone example application for DirectX 9
-// TODO: Allow resizing the application window.
#include <imgui.h>
#include "imgui_impl_dx9.h"
@@ -7,6 +6,10 @@
#define DIRECTINPUT_VERSION 0x0800
#include <dinput.h>
+// Data
+static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
+static D3DPRESENT_PARAMETERS g_d3dpp;
+
extern LRESULT ImGui_ImplDX9_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
@@ -15,6 +18,18 @@
switch (msg)
{
+ case WM_SIZE:
+ if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)
+ {
+ ImGui_ImplDX9_InvalidateDeviceObjects();
+ g_d3dpp.BackBufferWidth = LOWORD(lParam);
+ g_d3dpp.BackBufferHeight = HIWORD(lParam);
+ HRESULT hr = g_pd3dDevice->Reset(&g_d3dpp);
+ if (hr == D3DERR_INVALIDCALL)
+ IM_ASSERT(0);
+ ImGui_ImplDX9_CreateDeviceObjects();
+ }
+ return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
@@ -36,29 +51,24 @@
UnregisterClass(L"ImGui Example", wc.hInstance);
return 0;
}
- 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;
+ ZeroMemory(&g_d3dpp, sizeof(g_d3dpp));
+ g_d3dpp.Windowed = TRUE;
+ g_d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
+ g_d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
+ g_d3dpp.EnableAutoDepthStencil = TRUE;
+ g_d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
+ g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
// Create the D3DDevice
- LPDIRECT3DDEVICE9 pd3dDevice = NULL;
- if (pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &pd3dDevice) < 0)
+ if (pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &g_d3dpp, &g_pd3dDevice) < 0)
{
pD3D->Release();
UnregisterClass(L"ImGui Example", wc.hInstance);
return 0;
}
- ShowWindow(hwnd, SW_SHOWDEFAULT);
- UpdateWindow(hwnd);
-
// Setup ImGui binding
- ImGui_ImplDX9_Init(hwnd, pd3dDevice);
+ ImGui_ImplDX9_Init(hwnd, g_pd3dDevice);
//ImGuiIO& io = ImGui::GetIO();
//ImFont* my_font1 = io.Fonts->AddFontDefault();
//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("extra_fonts/Karla-Regular.ttf", 15.0f);
@@ -67,6 +77,9 @@
//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
ImGui_ImplDX9_InitFontsTexture();
+ ShowWindow(hwnd, SW_SHOWDEFAULT);
+ UpdateWindow(hwnd);
+
bool show_test_window = true;
bool show_another_window = false;
ImVec4 clear_col = ImColor(114, 144, 154);
@@ -112,21 +125,21 @@
}
// Rendering
- pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
- pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
- pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, false);
+ 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));
- pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, clear_col_dx, 1.0f, 0);
- if (pd3dDevice->BeginScene() >= 0)
+ g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, clear_col_dx, 1.0f, 0);
+ if (g_pd3dDevice->BeginScene() >= 0)
{
ImGui::Render();
- pd3dDevice->EndScene();
+ g_pd3dDevice->EndScene();
}
- pd3dDevice->Present(NULL, NULL, NULL, NULL);
+ g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
}
ImGui_ImplDX9_Shutdown();
- if (pd3dDevice) pd3dDevice->Release();
+ if (g_pd3dDevice) g_pd3dDevice->Release();
if (pD3D) pD3D->Release();
UnregisterClass(L"ImGui Example", wc.hInstance);
