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113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_WINRT && SDL_VIDEO_OPENGL_EGL
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/* EGL implementation of SDL OpenGL support */
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#include "SDL_winrtvideo_cpp.h"
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extern "C" {
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#include "SDL_winrtopengles.h"
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#include "SDL_loadso.h"
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}
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/* Windows includes */
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#include <wrl/client.h>
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using namespace Windows::UI::Core;
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/* ANGLE/WinRT constants */
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static const int ANGLE_D3D_FEATURE_LEVEL_ANY = 0;
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/*
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* SDL/EGL top-level implementation
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*/
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extern "C" int
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WINRT_GLES_LoadLibrary(_THIS, const char *path)
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{
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SDL_VideoData *video_data = (SDL_VideoData *)_this->driverdata;
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if (SDL_EGL_LoadLibrary(_this, path, EGL_DEFAULT_DISPLAY) != 0) {
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return -1;
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}
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/* Load ANGLE/WinRT-specific functions */
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CreateWinrtEglWindow_Function CreateWinrtEglWindow = (CreateWinrtEglWindow_Function) SDL_LoadFunction(_this->egl_data->egl_dll_handle, "CreateWinrtEglWindow");
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if (!CreateWinrtEglWindow) {
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return SDL_SetError("Could not retrieve ANGLE/WinRT function CreateWinrtEglWindow");
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}
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/* Create an ANGLE/WinRT EGL-window */
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/* TODO, WinRT: check for XAML usage before accessing the CoreWindow, as not doing so could lead to a crash */
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CoreWindow ^ native_win = CoreWindow::GetForCurrentThread();
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Microsoft::WRL::ComPtr<IUnknown> cpp_win = reinterpret_cast<IUnknown *>(native_win);
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HRESULT result = CreateWinrtEglWindow(cpp_win, ANGLE_D3D_FEATURE_LEVEL_ANY, &(video_data->winrtEglWindow));
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if (FAILED(result)) {
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return -1;
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}
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/* Call eglGetDisplay and eglInitialize as appropriate. On other
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* platforms, this would probably get done by SDL_EGL_LoadLibrary,
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* however ANGLE/WinRT's current implementation (as of Mar 22, 2014) of
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* eglGetDisplay requires that a C++ object be passed into it, so the
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* call will be made in this file, a C++ file, instead.
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*/
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Microsoft::WRL::ComPtr<IUnknown> cpp_display = video_data->winrtEglWindow;
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_this->egl_data->egl_display = ((eglGetDisplay_Function)_this->egl_data->eglGetDisplay)(cpp_display);
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if (!_this->egl_data->egl_display) {
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return SDL_SetError("Could not get EGL display");
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}
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if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
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return SDL_SetError("Could not initialize EGL");
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}
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return 0;
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}
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extern "C" void
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WINRT_GLES_UnloadLibrary(_THIS)
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{
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SDL_VideoData *video_data = (SDL_VideoData *)_this->driverdata;
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/* Release SDL's own COM reference to the ANGLE/WinRT IWinrtEglWindow */
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if (video_data->winrtEglWindow) {
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video_data->winrtEglWindow->Release();
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video_data->winrtEglWindow = nullptr;
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}
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/* Perform the bulk of the unloading */
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SDL_EGL_UnloadLibrary(_this);
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}
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extern "C" {
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SDL_EGL_CreateContext_impl(WINRT)
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SDL_EGL_SwapWindow_impl(WINRT)
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SDL_EGL_MakeCurrent_impl(WINRT)
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}
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#endif /* SDL_VIDEO_DRIVER_WINRT && SDL_VIDEO_OPENGL_EGL */
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/* vi: set ts=4 sw=4 expandtab: */
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