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winsys/d3d12: Implement the latency control option

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Reviewed-By: Sil Vilerino <sivileri@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31157>
This commit is contained in:
Jesse Natalie
2024-09-12 16:24:56 -07:00
committed by Marge Bot
parent e9ce526714
commit 28db11d2f3
1 changed files with 22 additions and 0 deletions
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src/gallium/winsys/d3d12/wgl/d3d12_wgl_framebuffer.cpp
+22
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@@ -55,6 +55,7 @@ struct d3d12_wgl_framebuffer {
HWND window;
ComPtr<IDXGISwapChain3> swapchain;
HANDLE waitable_object;
int latency = 2;
struct pipe_resource *buffers[num_buffers];
bool single_buffered;
struct pipe_resource *offscreen_buffer;
@@ -139,6 +140,8 @@ d3d12_wgl_framebuffer_resize(stw_winsys_framebuffer *fb,
framebuffer->waitable_object = framebuffer->swapchain->GetFrameLatencyWaitableObject();
WaitForSingleObject(framebuffer->waitable_object, INFINITE);
framebuffer->swapchain->SetMaximumFrameLatency(framebuffer->latency);
}
else {
struct pipe_fence_handle *fence = NULL;
@@ -276,6 +279,24 @@ d3d12_wgl_framebuffer_flush_frontbuffer(struct stw_winsys_framebuffer *pframebuf
pipe->flush(pipe, NULL, 0);
}
static void
d3d12_wgl_framebuffer_set_latency(struct stw_winsys_framebuffer *pframebuffer,
int latency)
{
if (latency < 1)
return;
auto framebuffer = d3d12_wgl_framebuffer(pframebuffer);
int delta = latency - framebuffer->latency;
while (delta < 0 && framebuffer->waitable_object) {
WaitForSingleObject(framebuffer->waitable_object, INFINITE);
++delta;
}
framebuffer->latency = latency;
if (framebuffer->swapchain)
framebuffer->swapchain->SetMaximumFrameLatency(latency);
}
struct stw_winsys_framebuffer *
d3d12_wgl_create_framebuffer(struct pipe_screen *screen,
HWND hWnd,
@@ -306,6 +327,7 @@ d3d12_wgl_create_framebuffer(struct pipe_screen *screen,
fb->base.present = d3d12_wgl_framebuffer_present;
fb->base.get_resource = d3d12_wgl_framebuffer_get_resource;
fb->base.flush_frontbuffer = d3d12_wgl_framebuffer_flush_frontbuffer;
fb->base.set_latency = d3d12_wgl_framebuffer_set_latency;
return &fb->base;
}