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WinRT: experimental and preliminary support for XAML-based overlays o…
…n Windows 8/RT The XAML support here is still rudimentary. Bugs do exist. You've been warned. XAML support in Windows Phone 8 is not yet available (in SDL/WinRT).
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Simple DirectMedia Layer | ||
| Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org> | ||
| This software is provided 'as-is', without any express or implied | ||
| warranty. In no event will the authors be held liable for any damages | ||
| arising from the use of this software. | ||
| Permission is granted to anyone to use this software for any purpose, | ||
| including commercial applications, and to alter it and redistribute it | ||
| freely, subject to the following restrictions: | ||
| 1. The origin of this software must not be misrepresented; you must not | ||
| claim that you wrote the original software. If you use this software | ||
| in a product, an acknowledgment in the product documentation would be | ||
| appreciated but is not required. | ||
| 2. Altered source versions must be plainly marked as such, and must not be | ||
| misrepresented as being the original software. | ||
| 3. This notice may not be removed or altered from any source distribution. | ||
| */ | ||
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| /* Windows includes */ | ||
| #include <agile.h> | ||
| #include <Windows.h> | ||
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| #if WINAPI_FAMILY == WINAPI_FAMILY_APP | ||
| #include <windows.ui.xaml.media.dxinterop.h> | ||
| #endif | ||
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| /* SDL includes */ | ||
| #include "SDL.h" | ||
| //#include "SDL_error.h" | ||
| //#include "SDL_log.h" | ||
| //#include "SDL_main.h" | ||
| //#include "SDL_system.h" | ||
| #include "../../video/winrt/SDL_winrtevents_c.h" | ||
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| /* External globals: */ | ||
| extern SDL_Window * WINRT_GlobalSDLWindow; | ||
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| /* Internal globals: */ | ||
| SDL_bool WINRT_XAMLWasEnabled = SDL_FALSE; | ||
| int (*WINRT_XAMLAppMainFunction)(int, char **) = NULL; | ||
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| #if WINAPI_FAMILY == WINAPI_FAMILY_APP | ||
| ISwapChainBackgroundPanelNative * WINRT_GlobalSwapChainBackgroundPanelNative = NULL; | ||
| static Windows::Foundation::EventRegistrationToken WINRT_XAMLAppEventToken; | ||
| #endif | ||
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| /* | ||
| * Input event handlers (XAML) | ||
| */ | ||
| #if WINAPI_FAMILY == WINAPI_FAMILY_APP | ||
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| static void | ||
| WINRT_OnPointerPressedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args) | ||
| { | ||
| WINRT_ProcessPointerPressedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr)); | ||
| } | ||
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| static void | ||
| WINRT_OnPointerReleasedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args) | ||
| { | ||
| WINRT_ProcessPointerReleasedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr)); | ||
| } | ||
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| static void | ||
| WINRT_OnPointerWheelChangedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args) | ||
| { | ||
| WINRT_ProcessPointerWheelChangedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr)); | ||
| } | ||
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| static void | ||
| WINRT_OnPointerMovedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args) | ||
| { | ||
| WINRT_ProcessPointerMovedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr)); | ||
| } | ||
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| #endif // WINAPI_FAMILY == WINAPI_FAMILY_APP | ||
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| /* | ||
| * XAML-to-SDL Rendering Callback | ||
| */ | ||
| #if WINAPI_FAMILY == WINAPI_FAMILY_APP | ||
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| static void | ||
| WINRT_OnRenderViaXAML(_In_ Platform::Object^ sender, _In_ Platform::Object^ args) | ||
| { | ||
| WINRT_CycleXAMLThread(); | ||
| } | ||
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| #endif // WINAPI_FAMILY == WINAPI_FAMILY_APP | ||
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| /* | ||
| * SDL + XAML Initialization | ||
| */ | ||
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| extern "C" int | ||
| SDL_WinRTInitXAMLApp(Platform::Object ^backgroundPanel, int (*mainFunction)(int, char **)) | ||
| { | ||
| #if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP | ||
| return SDL_SetError("XAML support is not yet available in Windows Phone."); | ||
| #else | ||
| // Declare C++/CX namespaces: | ||
| using namespace Platform; | ||
| using namespace Windows::Foundation; | ||
| using namespace Windows::UI::Core; | ||
| using namespace Windows::UI::Xaml; | ||
| using namespace Windows::UI::Xaml::Controls; | ||
| using namespace Windows::UI::Xaml::Input; | ||
| using namespace Windows::UI::Xaml::Media; | ||
|
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| // Make sure we have a valid XAML element (to draw onto): | ||
| if ( ! backgroundPanel) { | ||
| return SDL_SetError("'backgroundPanel' can't be NULL"); | ||
| } | ||
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| SwapChainBackgroundPanel ^swapChainBackgroundPanel = dynamic_cast<SwapChainBackgroundPanel ^>(backgroundPanel); | ||
| if ( ! swapChainBackgroundPanel) { | ||
| return SDL_SetError("An unknown or unsupported type of XAML control was specified."); | ||
| } | ||
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| // Setup event handlers: | ||
| swapChainBackgroundPanel->PointerPressed += ref new PointerEventHandler(WINRT_OnPointerPressedViaXAML); | ||
| swapChainBackgroundPanel->PointerReleased += ref new PointerEventHandler(WINRT_OnPointerReleasedViaXAML); | ||
| swapChainBackgroundPanel->PointerWheelChanged += ref new PointerEventHandler(WINRT_OnPointerWheelChangedViaXAML); | ||
| swapChainBackgroundPanel->PointerMoved += ref new PointerEventHandler(WINRT_OnPointerMovedViaXAML); | ||
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| // Setup for rendering: | ||
| IInspectable *panelInspectable = (IInspectable*) reinterpret_cast<IInspectable*>(swapChainBackgroundPanel); | ||
| panelInspectable->QueryInterface(__uuidof(ISwapChainBackgroundPanelNative), (void **)&WINRT_GlobalSwapChainBackgroundPanelNative); | ||
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| WINRT_XAMLAppEventToken = CompositionTarget::Rendering::add(ref new EventHandler<Object^>(WINRT_OnRenderViaXAML)); | ||
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| // Make sure the app is ready to call the SDL-centric main() function: | ||
| WINRT_XAMLAppMainFunction = mainFunction; | ||
| SDL_SetMainReady(); | ||
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| // Make sure video-init knows that we're initializing XAML: | ||
| SDL_bool oldXAMLWasEnabledValue = WINRT_XAMLWasEnabled; | ||
| WINRT_XAMLWasEnabled = SDL_TRUE; | ||
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| // Make sure video modes are detected now, while we still have access to the WinRT | ||
| // CoreWindow. WinRT will not allow the app's CoreWindow to be accessed via the | ||
| // SDL/WinRT thread. | ||
| if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) { | ||
| // SDL_InitSubSystem will, on error, set the SDL error. Let that propogate to | ||
| // the caller to here: | ||
| WINRT_XAMLWasEnabled = oldXAMLWasEnabledValue; | ||
| return -1; | ||
| } | ||
|
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| // All done, for now. | ||
| return 0; | ||
| #endif // WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP / else | ||
| } |
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