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WinRT: Call IDXGIDevice3::Trim before app-suspend, as required on Windows 8.1

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Thanks to Sylvain Becker for pointing this out!
This commit is contained in:
David Ludwig
2014-03-24 22:51:03 -04:00
parent cbf718461c
commit a99bf4d705
2 changed files with 45 additions and 0 deletions
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19
src/core/winrt/SDL_winrtapp_direct3d.cpp
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@@ -70,6 +70,13 @@ extern "C" {
#include "SDL_winrtapp_common.h"
#include "SDL_winrtapp_direct3d.h"
#if SDL_VIDEO_RENDER_D3D11 && !SDL_RENDER_DISABLED
/* Calling IDXGIDevice3::Trim on the active Direct3D 11.x device is necessary
* when Windows 8.1 apps are about to get suspended.
*/
extern "C" void D3D11_Trim(SDL_Renderer *);
#endif
// Compile-time debugging options:
// To enable, uncomment; to disable, comment them out.
@@ -616,6 +623,18 @@ void SDL_WinRTApp::OnSuspending(Platform::Object^ sender, SuspendingEventArgs^ a
// WinRT.
SDL_SendAppEvent(SDL_APP_DIDENTERBACKGROUND);
// Let the Direct3D 11 renderer prepare for the app to be backgrounded.
// This is necessary for Windows 8.1, possibly elsewhere in the future.
// More details at: http://msdn.microsoft.com/en-us/library/windows/apps/Hh994929.aspx
#if SDL_VIDEO_RENDER_D3D11 && !SDL_RENDER_DISABLED
if (WINRT_GlobalSDLWindow) {
SDL_Renderer * renderer = SDL_GetRenderer(WINRT_GlobalSDLWindow);
if (renderer && (SDL_strcmp(renderer->info.name, "direct3d11") == 0)) {
D3D11_Trim(renderer);
}
}
#endif
deferral->Complete();
});
}