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Examples: DirectX9 example application handle window resizing.

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This commit is contained in:
ocornut 2015-03-09 14:13:29 +00:00
parent 25765e4bfc
commit 866fa95aaa
4 changed files with 76 additions and 41 deletions
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16
examples/directx11_example/imgui_impl_dx11.cpp
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@ -15,6 +15,7 @@ static INT64 g_Time = 0;
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 @@ static bool InitDirect3DState()
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 @@ bool ImGui_ImplDX11_Init(void* hwnd, ID3D11Device* device, ID3D11DeviceContex
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 @@ bool ImGui_ImplDX11_Init(void* hwnd, ID3D11Device* device, ID3D11DeviceContex
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImGui_ImplDX11_RenderDrawLists;
io.ImeWindowHandle = hwnd;
io.ImeWindowHandle = g_hWnd;
return true;
}
@ -428,6 +423,11 @@ void ImGui_ImplDX11_NewFrame()
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 *)&current_time);

38
examples/directx9_example/imgui_impl_dx9.cpp
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@ -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 @@ void ImGui_ImplDX9_InitFontsTexture()
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 @@ bool ImGui_ImplDX9_Init(void* hwnd, IDirect3DDevice9* device)
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 @@ void ImGui_ImplDX9_Shutdown()
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 @@ void ImGui_ImplDX9_NewFrame()
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 *)&current_time);

4
examples/directx9_example/imgui_impl_dx9.h
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@ -8,6 +8,10 @@ void ImGui_ImplDX9_InitFontsTexture();
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.

59
examples/directx9_example/main.cpp
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@ -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 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
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 @@ int main(int argc, char** argv)
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 @@ int main(int argc, char** argv)
//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 @@ int main(int argc, char** argv)
}
// 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);