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Examples: DirectX11 example application handles window resizing.

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This commit is contained in:
ocornut
2015-03-09 14:51:10 +00:00
parent 866fa95aaa
commit 66a5837ba8
3 changed files with 119 additions and 86 deletions
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59
examples/directx11_example/main.cpp
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@ -1,5 +1,4 @@
// ImGui - standalone example application for DirectX 11
// TODO: Allow resizing the application window.
#include <imgui.h>
#include "imgui_impl_dx11.h"
@ -14,7 +13,29 @@ static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
static IDXGISwapChain* g_pSwapChain = NULL;
static ID3D11RenderTargetView* g_mainRenderTargetView = NULL;
HRESULT InitDeviceD3D(HWND hWnd)
void CreateRenderTarget()
{
DXGI_SWAP_CHAIN_DESC sd;
g_pSwapChain->GetDesc(&sd);
// Create the render target
ID3D11Texture2D* pBackBuffer;
D3D11_RENDER_TARGET_VIEW_DESC render_target_view_desc;
ZeroMemory(&render_target_view_desc, sizeof(render_target_view_desc));
render_target_view_desc.Format = sd.BufferDesc.Format;
render_target_view_desc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
g_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
g_pd3dDevice->CreateRenderTargetView(pBackBuffer, &render_target_view_desc, &g_mainRenderTargetView);
g_pd3dDeviceContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);
pBackBuffer->Release();
}
void CleanupRenderTarget()
{
if (g_mainRenderTargetView) { g_mainRenderTargetView->Release(); g_mainRenderTargetView = NULL; }
}
HRESULT CreateDeviceD3D(HWND hWnd)
{
// Setup swap chain
DXGI_SWAP_CHAIN_DESC sd;
@ -65,28 +86,17 @@ HRESULT InitDeviceD3D(HWND hWnd)
pRState->Release();
}
// Create the render target
{
ID3D11Texture2D* pBackBuffer;
D3D11_RENDER_TARGET_VIEW_DESC render_target_view_desc;
ZeroMemory(&render_target_view_desc, sizeof(render_target_view_desc));
render_target_view_desc.Format = sd.BufferDesc.Format;
render_target_view_desc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
g_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
g_pd3dDevice->CreateRenderTargetView(pBackBuffer, &render_target_view_desc, &g_mainRenderTargetView);
g_pd3dDeviceContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);
pBackBuffer->Release();
}
CreateRenderTarget();
return S_OK;
}
void CleanupDeviceD3D()
{
if (g_mainRenderTargetView) g_mainRenderTargetView->Release();
if (g_pSwapChain) g_pSwapChain->Release();
if (g_pd3dDeviceContext) g_pd3dDeviceContext->Release();
if (g_pd3dDevice) g_pd3dDevice->Release();
CleanupRenderTarget();
if (g_pSwapChain) { g_pSwapChain->Release(); g_pSwapChain = NULL; }
if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
}
extern LRESULT ImGui_ImplDX11_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
@ -97,6 +107,16 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
switch (msg)
{
case WM_SIZE:
if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)
{
ImGui_ImplDX11_InvalidateDeviceObjects();
CleanupRenderTarget();
g_pSwapChain->ResizeBuffers(0, (UINT)LOWORD(lParam), (UINT)HIWORD(lParam), DXGI_FORMAT_UNKNOWN, 0);
CreateRenderTarget();
ImGui_ImplDX11_CreateDeviceObjects();
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
@ -112,7 +132,7 @@ int main(int argc, char** argv)
HWND hwnd = CreateWindow(L"ImGui Example", L"ImGui DirectX11 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
// Initialize Direct3D
if (InitDeviceD3D(hwnd) < 0)
if (CreateDeviceD3D(hwnd) < 0)
{
CleanupDeviceD3D();
UnregisterClass(L"ImGui Example", wc.hInstance);
@ -131,7 +151,6 @@ int main(int argc, char** argv)
//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
ImGui_ImplDX11_InitFontsTexture();
bool show_test_window = true;
bool show_another_window = false;