/// <summary>
/// Initialize RPi Broadcom VideoCore IV API.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void KhronosApi_PlatformInit_Rpi(object sender, EglEventArgs e)
{
if (Bcm.IsAvailable)
{
Bcm.bcm_host_init();
}
}
/// <summary>
/// Releases all resources used by the <see cref="VideoCoreWindow"/> object.
/// </summary>
/// <param name="disposing">
/// </param>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
if (_ElementHandle != 0)
{
uint updateHandle = Bcm.vc_dispmanx_update_start(0);
Bcm.vc_dispmanx_element_remove(updateHandle, _ElementHandle);
Bcm.vc_dispmanx_update_submit_sync(updateHandle);
_ElementHandle = 0;
}
if (_DispManxDisplay != 0)
{
Bcm.vc_dispmanx_display_close(_DispManxDisplay);
_DispManxDisplay = 0;
}
if (_NativeWindowLock != null)
{
_NativeWindowLock.Dispose();
_NativeWindowLock = null;
}
}
}
/// <summary>
/// Construct a fullscreen window.
/// </summary>
public VideoCoreWindow()
{
try {
int width, height;
KhronosApi.LogComment("Creating VideoCore IV native window");
if (Bcm.graphics_get_display_size(0 /* LCD */, out width, out height) < 0)
{
throw new InvalidOperationException("unable to get BCM display size");
}
Bcm.VC_RECT_T dstRect = new Bcm.VC_RECT_T(0, 0, width, height);
Bcm.VC_RECT_T srcRect = new Bcm.VC_RECT_T(0, 0, width << 16, height << 16);
if ((_DispManxDisplay = Bcm.vc_dispmanx_display_open(0 /* LCD */)) == 0)
{
throw new InvalidOperationException("unable to open DispManX display");
}
// Update - Add element
uint updateHandle = Bcm.vc_dispmanx_update_start(0);
_ElementHandle = Bcm.vc_dispmanx_element_add(updateHandle, _DispManxDisplay, 0, dstRect, 0, srcRect, 0, IntPtr.Zero, IntPtr.Zero, Bcm.DISPMANX_TRANSFORM_T.DISPMANX_NO_ROTATE);
Bcm.vc_dispmanx_update_submit_sync(updateHandle);
// Native window
_NativeWindow = new EGL_DISPMANX_WINDOW_T();
_NativeWindow.element = _ElementHandle;
_NativeWindow.width = width;
_NativeWindow.height = height;
// Keep native window pinned
_NativeWindowLock = new MemoryLock(_NativeWindow);
KhronosApi.LogComment("VideoCore IV Native Window is 0x{0}", _NativeWindowLock.Address.ToString("X"));
} catch {
Dispose();
throw;
}
}
/// <summary>
/// Initialize OpenGL namespace static environment. This method shall be called before any other classes methods.
/// </summary>
public static void Initialize()
{
if (_Initialized == true)
{
return; // Already initialized
}
_Initialized = true;
// Before linking procedures, append ANGLE directory in path
string assemblyPath = Path.GetDirectoryName(Assembly.GetAssembly(typeof(Egl)).Location);
string anglePath = null;
switch (Platform.CurrentPlatformId)
{
case Platform.Id.WindowsNT:
#if DEBUG
if (IntPtr.Size == 8)
{
anglePath = Path.Combine(assemblyPath, @"ANGLE\winrt10d\x64");
}
else
{
anglePath = Path.Combine(assemblyPath, @"ANGLE\winrt10d\x86");
}
#else
if (IntPtr.Size == 8)
{
anglePath = Path.Combine(assemblyPath, @"ANGLE\winrt10\x64");
}
else
{
anglePath = Path.Combine(assemblyPath, @"ANGLE\winrt10\x86");
}
#endif
break;
case Platform.Id.Linux:
// Note: on RPi libEGL.so depends on libGLESv2.so, so it's required to pre-load the shared library
GetProcAddressX11.Instance.GetLibraryHandle("libGLESv2.so");
break;
}
// Include ANGLE path, if any
if (anglePath != null && Directory.Exists(anglePath))
{
OpenGL.GetProcAddress.GetProcAddressOS.AddLibraryDirectory(Path.Combine(assemblyPath, anglePath));
}
// Load procedures
string platformLibrary = GetPlatformLibrary();
try {
LogComment("Querying EGL from {0}", platformLibrary);
BindAPI <Egl>(platformLibrary, OpenGL.GetProcAddress.GetProcAddressOS);
LogComment("EGL availability: {0}", IsAvailable);
} catch (Exception exception) {
/* Fail-safe (it may fail due Egl access) */
LogComment("EGL not available:\n{0}", exception.ToString());
}
// Support for BCM VideoCore API
if (IsAvailable && Bcm.IsAvailable)
{
// This need to be executed before any EGL/GL routine
Bcm.bcm_host_init();
}
#if DEBUG
string envEglInit = Environment.GetEnvironmentVariable("EGL_INIT");
if (envEglInit != null && envEglInit == "NO")
{
return;
}
#endif
// Get EGL information
if (IsAvailable)
{
IntPtr eglDisplay = GetDisplay(new IntPtr(DEFAULT_DISPLAY));
try {
if (Initialize(eglDisplay, null, null) == false)
{
throw new InvalidOperationException("unable to initialize EGL");
}
// Query EGL version
string eglVersionString = QueryString(eglDisplay, VERSION);
_CurrentVersion = KhronosVersion.Parse(eglVersionString, KhronosVersion.ApiEgl);
// Query EGL vendor
_Vendor = QueryString(eglDisplay, VENDOR);
// Client APIs
if (_CurrentVersion >= Version_120)
{
string clientApisString = QueryString(eglDisplay, CLIENT_APIS);
_AvailableApis = System.Text.RegularExpressions.Regex.Split(clientApisString, " ");
}
} finally {
Terminate(eglDisplay);
}
}
}