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Headless: Present OpenGL frames too

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OpenGL's render thread only finishes a frame when it's presented, so the
emu thread eventually waited forever in BeginFrame for a free frame, with
the render thread waiting for work. GPU tests and games hung, silently,
as a blocked host thread also defeats the timeouts.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
This commit is contained in:
Henrik RydgårdandClaude Opus 5.5 committed 2026-09-25 09:47:58 -06:00
1 parent 47730e0eb0
commit c9cddb99e9
1 file changed
+6 -4
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headless/Headless.cpp
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@@ -330,12 +330,14 @@ struct AutoTestOptions {
int requiredDisableHLE;
};
// Ends a frame of the draw context the way the app does, presenting it. With Vulkan, presenting is
// also what returns a frame's image, and a frame that isn't presented would wait forever for its
// next one. The other backends present to a hidden window, which could wait for vsync.
// Ends a frame of the draw context the way the app does, presenting it. Unpresented frames never
// finish: with Vulkan, presenting is what returns a frame's image, and OpenGL's render thread only
// finishes a frame when it's presented, so either would eventually wait forever. Neither waits for
// vsync here (Vulkan and, on macOS, OpenGL render offscreen, and the hidden-window OpenGL context
// swaps with interval 0). D3D11 presents to a hidden window, which could.
static void EndDrawFrame(Draw::DrawContext *draw) {
draw->EndFrame();
if (GetGPUBackend() == GPUBackend::VULKAN) {
if (GetGPUBackend() == GPUBackend::VULKAN || GetGPUBackend() == GPUBackend::OPENGL) {
draw->Present(Draw::PresentMode::FIFO);
}
}