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Examples: Win32+DX9,DX10,DX11,DX12: rework main loop to handle minimization and screen locking. (#2496, #3907, #6308, #7615)

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This commit is contained in:
ocornut 2024-05-23 15:15:42 +02:00
parent 6d1a6f1c74
commit ec1d2be96f
5 changed files with 62 additions and 10 deletions
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2
docs/CHANGELOG.txt
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@ -66,6 +66,8 @@ Other changes:
- Nav: fixed holding Ctrl or gamepad L1 from not slowing down keyboard/gamepad tweak speed.
Broken during a refactor refactor for 1.89. Holding Shift/R1 to speed up wasn't broken.
- Tables: fixed cell background of fully clipped row overlapping with header. (#7575, #7041) [@prabuinet]
- Examples: Win32+DX9,DX10,DX11,DX12: rework main loop to handle minimization and screen
locking without burning resources by running unthrottled code. (#2496, #3907, #6308, #7615)
- Backends: all backends + demo now call IMGUI_CHECKVERSION() to verify ABI compatibility between caller
code and compiled version of Dear ImGui. If you get an assert it most likely mean you have a build issue,
read comments near the assert. (#7568)

16
examples/example_win32_directx10/main.cpp
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@ -16,6 +16,7 @@
// Data
static ID3D10Device* g_pd3dDevice = nullptr;
static IDXGISwapChain* g_pSwapChain = nullptr;
static bool g_SwapChainOccluded = false;
static UINT g_ResizeWidth = 0, g_ResizeHeight = 0;
static ID3D10RenderTargetView* g_mainRenderTargetView = nullptr;
@ -100,6 +101,14 @@ int main(int, char**)
if (done)
break;
// Handle window being minimized or screen locked
if (g_SwapChainOccluded && g_pSwapChain->Present(0, DXGI_PRESENT_TEST) == DXGI_STATUS_OCCLUDED)
{
::Sleep(10);
continue;
}
g_SwapChainOccluded = false;
// Handle window resize (we don't resize directly in the WM_SIZE handler)
if (g_ResizeWidth != 0 && g_ResizeHeight != 0)
{
@ -158,10 +167,13 @@ int main(int, char**)
g_pd3dDevice->ClearRenderTargetView(g_mainRenderTargetView, clear_color_with_alpha);
ImGui_ImplDX10_RenderDrawData(ImGui::GetDrawData());
g_pSwapChain->Present(1, 0); // Present with vsync
//g_pSwapChain->Present(0, 0); // Present without vsync
// Present
HRESULT hr = g_pSwapChain->Present(1, 0); // Present with vsync
//HRESULT hr = g_pSwapChain->Present(0, 0); // Present without vsync
g_SwapChainOccluded = (hr == DXGI_STATUS_OCCLUDED);
}
// Cleanup
ImGui_ImplDX10_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();

15
examples/example_win32_directx11/main.cpp
View File

@ -16,6 +16,7 @@
static ID3D11Device* g_pd3dDevice = nullptr;
static ID3D11DeviceContext* g_pd3dDeviceContext = nullptr;
static IDXGISwapChain* g_pSwapChain = nullptr;
static bool g_SwapChainOccluded = false;
static UINT g_ResizeWidth = 0, g_ResizeHeight = 0;
static ID3D11RenderTargetView* g_mainRenderTargetView = nullptr;
@ -100,6 +101,14 @@ int main(int, char**)
if (done)
break;
// Handle window being minimized or screen locked
if (g_SwapChainOccluded && g_pSwapChain->Present(0, DXGI_PRESENT_TEST) == DXGI_STATUS_OCCLUDED)
{
::Sleep(10);
continue;
}
g_SwapChainOccluded = false;
// Handle window resize (we don't resize directly in the WM_SIZE handler)
if (g_ResizeWidth != 0 && g_ResizeHeight != 0)
{
@ -158,8 +167,10 @@ int main(int, char**)
g_pd3dDeviceContext->ClearRenderTargetView(g_mainRenderTargetView, clear_color_with_alpha);
ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
g_pSwapChain->Present(1, 0); // Present with vsync
//g_pSwapChain->Present(0, 0); // Present without vsync
// Present
HRESULT hr = g_pSwapChain->Present(1, 0); // Present with vsync
//HRESULT hr = g_pSwapChain->Present(0, 0); // Present without vsync
g_SwapChainOccluded = (hr == DXGI_STATUS_OCCLUDED);
}
// Cleanup

17
examples/example_win32_directx12/main.cpp
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@ -26,6 +26,8 @@
#pragma comment(lib, "dxguid.lib")
#endif
#include "imgui_internal.h"
struct FrameContext
{
ID3D12CommandAllocator* CommandAllocator;
@ -47,6 +49,7 @@ static ID3D12Fence* g_fence = nullptr;
static HANDLE g_fenceEvent = nullptr;
static UINT64 g_fenceLastSignaledValue = 0;
static IDXGISwapChain3* g_pSwapChain = nullptr;
static bool g_SwapChainOccluded = false;
static HANDLE g_hSwapChainWaitableObject = nullptr;
static ID3D12Resource* g_mainRenderTargetResource[NUM_BACK_BUFFERS] = {};
static D3D12_CPU_DESCRIPTOR_HANDLE g_mainRenderTargetDescriptor[NUM_BACK_BUFFERS] = {};
@ -137,6 +140,14 @@ int main(int, char**)
if (done)
break;
// Handle window screen locked
if (g_SwapChainOccluded && g_pSwapChain->Present(0, DXGI_PRESENT_TEST) == DXGI_STATUS_OCCLUDED)
{
::Sleep(10);
continue;
}
g_SwapChainOccluded = false;
// Start the Dear ImGui frame
ImGui_ImplDX12_NewFrame();
ImGui_ImplWin32_NewFrame();
@ -209,8 +220,10 @@ int main(int, char**)
g_pd3dCommandQueue->ExecuteCommandLists(1, (ID3D12CommandList* const*)&g_pd3dCommandList);
g_pSwapChain->Present(1, 0); // Present with vsync
//g_pSwapChain->Present(0, 0); // Present without vsync
// Present
HRESULT hr = g_pSwapChain->Present(1, 0); // Present with vsync
//HRESULT hr = g_pSwapChain->Present(0, 0); // Present without vsync
g_SwapChainOccluded = (hr == DXGI_STATUS_OCCLUDED);
UINT64 fenceValue = g_fenceLastSignaledValue + 1;
g_pd3dCommandQueue->Signal(g_fence, fenceValue);

22
examples/example_win32_directx9/main.cpp
View File

@ -15,6 +15,7 @@
// Data
static LPDIRECT3D9 g_pD3D = nullptr;
static LPDIRECT3DDEVICE9 g_pd3dDevice = nullptr;
static bool g_DeviceLost = false;
static UINT g_ResizeWidth = 0, g_ResizeHeight = 0;
static D3DPRESENT_PARAMETERS g_d3dpp = {};
@ -98,6 +99,20 @@ int main(int, char**)
if (done)
break;
// Handle lost D3D9 device
if (g_DeviceLost)
{
HRESULT hr = g_pd3dDevice->TestCooperativeLevel();
if (hr == D3DERR_DEVICELOST)
{
::Sleep(10);
continue;
}
if (hr == D3DERR_DEVICENOTRESET)
ResetDevice();
g_DeviceLost = false;
}
// Handle window resize (we don't resize directly in the WM_SIZE handler)
if (g_ResizeWidth != 0 && g_ResizeHeight != 0)
{
@ -163,12 +178,11 @@ int main(int, char**)
g_pd3dDevice->EndScene();
}
HRESULT result = g_pd3dDevice->Present(nullptr, nullptr, nullptr, nullptr);
// Handle loss of D3D9 device
if (result == D3DERR_DEVICELOST && g_pd3dDevice->TestCooperativeLevel() == D3DERR_DEVICENOTRESET)
ResetDevice();
if (result == D3DERR_DEVICELOST)
g_DeviceLost = true;
}
// Cleanup
ImGui_ImplDX9_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();