SDL 2.0
SDL_winrtapp_xaml.cpp
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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21
22/* Windows includes */
23#include <agile.h>
24#include <Windows.h>
25
26#if WINAPI_FAMILY == WINAPI_FAMILY_APP
27#include <windows.ui.xaml.media.dxinterop.h>
28#endif
29
30
31/* SDL includes */
32#include "../../SDL_internal.h"
33#include "SDL.h"
34#include "../../video/winrt/SDL_winrtevents_c.h"
35#include "../../video/winrt/SDL_winrtvideo_cpp.h"
36#include "SDL_winrtapp_common.h"
37#include "SDL_winrtapp_xaml.h"
38
39
40
41/* SDL-internal globals: */
43
44#if WINAPI_FAMILY == WINAPI_FAMILY_APP
45extern "C"
46ISwapChainBackgroundPanelNative * WINRT_GlobalSwapChainBackgroundPanelNative = NULL;
47static Windows::Foundation::EventRegistrationToken WINRT_XAMLAppEventToken;
48#endif
49
50
51/*
52 * Input event handlers (XAML)
53 */
54#if WINAPI_FAMILY == WINAPI_FAMILY_APP
55
56static void
57WINRT_OnPointerPressedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
58{
59 WINRT_ProcessPointerPressedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
60}
61
62static void
63WINRT_OnPointerMovedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
64{
65 WINRT_ProcessPointerMovedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
66}
67
68static void
69WINRT_OnPointerReleasedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
70{
71 WINRT_ProcessPointerReleasedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
72}
73
74static void
75WINRT_OnPointerWheelChangedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
76{
77 WINRT_ProcessPointerWheelChangedEvent(WINRT_GlobalSDLWindow, args->GetCurrentPoint(nullptr));
78}
79
80#endif // WINAPI_FAMILY == WINAPI_FAMILY_APP
81
82
83/*
84 * XAML-to-SDL Rendering Callback
85 */
86#if WINAPI_FAMILY == WINAPI_FAMILY_APP
87
88static void
89WINRT_OnRenderViaXAML(_In_ Platform::Object^ sender, _In_ Platform::Object^ args)
90{
91 WINRT_CycleXAMLThread();
92}
93
94#endif // WINAPI_FAMILY == WINAPI_FAMILY_APP
95
96
97/*
98 * SDL + XAML Initialization
99 */
100
101int
102SDL_WinRTInitXAMLApp(int (*mainFunction)(int, char **), void * backgroundPanelAsIInspectable)
103{
104#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
105 return SDL_SetError("XAML support is not yet available in Windows Phone.");
106#else
107 // Declare C++/CX namespaces:
108 using namespace Platform;
109 using namespace Windows::Foundation;
110 using namespace Windows::UI::Core;
111 using namespace Windows::UI::Xaml;
112 using namespace Windows::UI::Xaml::Controls;
113 using namespace Windows::UI::Xaml::Input;
114 using namespace Windows::UI::Xaml::Media;
115
116 // Make sure we have a valid XAML element (to draw onto):
117 if ( ! backgroundPanelAsIInspectable) {
118 return SDL_SetError("'backgroundPanelAsIInspectable' can't be NULL");
119 }
120
121 Platform::Object ^ backgroundPanel = reinterpret_cast<Object ^>((IInspectable *) backgroundPanelAsIInspectable);
122 SwapChainBackgroundPanel ^swapChainBackgroundPanel = dynamic_cast<SwapChainBackgroundPanel ^>(backgroundPanel);
123 if ( ! swapChainBackgroundPanel) {
124 return SDL_SetError("An unknown or unsupported type of XAML control was specified.");
125 }
126
127 // Setup event handlers:
128 swapChainBackgroundPanel->PointerPressed += ref new PointerEventHandler(WINRT_OnPointerPressedViaXAML);
129 swapChainBackgroundPanel->PointerReleased += ref new PointerEventHandler(WINRT_OnPointerReleasedViaXAML);
130 swapChainBackgroundPanel->PointerWheelChanged += ref new PointerEventHandler(WINRT_OnPointerWheelChangedViaXAML);
131 swapChainBackgroundPanel->PointerMoved += ref new PointerEventHandler(WINRT_OnPointerMovedViaXAML);
132
133 // Setup for rendering:
134 IInspectable *panelInspectable = (IInspectable*) reinterpret_cast<IInspectable*>(swapChainBackgroundPanel);
135 panelInspectable->QueryInterface(__uuidof(ISwapChainBackgroundPanelNative), (void **)&WINRT_GlobalSwapChainBackgroundPanelNative);
136
137 WINRT_XAMLAppEventToken = CompositionTarget::Rendering::add(ref new EventHandler<Object^>(WINRT_OnRenderViaXAML));
138
139 // Make sure the app is ready to call the SDL-centric main() function:
140 WINRT_SDLAppEntryPoint = mainFunction;
142
143 // Make sure video-init knows that we're initializing XAML:
144 SDL_bool oldXAMLWasEnabledValue = WINRT_XAMLWasEnabled;
146
147 // Make sure video modes are detected now, while we still have access to the WinRT
148 // CoreWindow. WinRT will not allow the app's CoreWindow to be accessed via the
149 // SDL/WinRT thread.
151 // SDL_InitSubSystem will, on error, set the SDL error. Let that propogate to
152 // the caller to here:
153 WINRT_XAMLWasEnabled = oldXAMLWasEnabledValue;
154 return -1;
155 }
156
157 // All done, for now.
158 return 0;
159#endif // WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP / else
160}
#define SDL_INIT_VIDEO
Definition: SDL.h:79
#define SDL_SetError
#define SDL_InitSubSystem
#define SDL_SetMainReady
GLenum GLint ref
SDL_bool
Definition: SDL_stdinc.h:162
@ SDL_TRUE
Definition: SDL_stdinc.h:164
@ SDL_FALSE
Definition: SDL_stdinc.h:163
int(* WINRT_SDLAppEntryPoint)(int, char **)
ISwapChainBackgroundPanelNative * WINRT_GlobalSwapChainBackgroundPanelNative
static void WINRT_OnPointerPressedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
static void WINRT_OnPointerMovedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
int SDL_WinRTInitXAMLApp(int(*mainFunction)(int, char **), void *backgroundPanelAsIInspectable)
static void WINRT_OnPointerReleasedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
static Windows::Foundation::EventRegistrationToken WINRT_XAMLAppEventToken
static void WINRT_OnPointerWheelChangedViaXAML(Platform::Object^ sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs^ args)
static void WINRT_OnRenderViaXAML(_In_ Platform::Object^ sender, _In_ Platform::Object^ args)
SDL_bool WINRT_XAMLWasEnabled
SDL_Window * WINRT_GlobalSDLWindow
#define NULL
Definition: begin_code.h:167