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Backends: DX10, DX11: avoid ImGui_ImplXXXX_SwapBuffers() handlers for secondary viewports crashing if SwapChain could not be created.

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It's not really clear when that would fail but someone privately reported, and since we allow failure in ImGui_ImplDX11_CreateWindow() it makes sense to allow it here.
This commit is contained in:
ocornut
2025-10-10 18:31:20 +02:00
parent cab82d9c76
commit 8de97d14d8
3 changed files with 6 additions and 2 deletions
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3
backends/imgui_impl_dx10.cpp
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@@ -770,7 +770,8 @@ static void ImGui_ImplDX10_RenderViewport(ImGuiViewport* viewport, void*)
static void ImGui_ImplDX10_SwapBuffers(ImGuiViewport* viewport, void*)
{
ImGui_ImplDX10_ViewportData* vd = (ImGui_ImplDX10_ViewportData*)viewport->RendererUserData;
vd->SwapChain->Present(0, 0); // Present without vsync
if (vd->SwapChain)
vd->SwapChain->Present(0, 0); // Present without vsync
}
void ImGui_ImplDX10_InitMultiViewportSupport()

3
backends/imgui_impl_dx11.cpp
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@@ -800,7 +800,8 @@ static void ImGui_ImplDX11_RenderWindow(ImGuiViewport* viewport, void*)
static void ImGui_ImplDX11_SwapBuffers(ImGuiViewport* viewport, void*)
{
ImGui_ImplDX11_ViewportData* vd = (ImGui_ImplDX11_ViewportData*)viewport->RendererUserData;
vd->SwapChain->Present(0, 0); // Present without vsync
if (vd->SwapChain)
vd->SwapChain->Present(0, 0); // Present without vsync
}
static void ImGui_ImplDX11_InitMultiViewportSupport()

2
docs/CHANGELOG.txt
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@@ -142,6 +142,8 @@ Docking+Viewports Branch:
backends have been shutdown since 1.90.4. Changed into asserts. (#7175, #8945)
- Backends: DX10, DX11, DX12: Disabled DXGI's Alt+Enter default behavior on secondary
viewports managed by the backend. (#4350) [@PathogenDavid]
- Backends: DX10, DX11: avoid ImGui_ImplXXXX_SwapBuffers() handlers for secondary
viewports crashing if SwapChain could not be created.
- Backends: Vulkan: Added a way to configure secondary viewport pipelinen creation
by setting init_info.PipelineInfoForViewports fields. (#8946, #8110, #8111, #8686)
- Backends: Vulkan: Added a way to configure secondary viewport swapchain VkImageUsageFlags