/// <summary>
/// Initializes a new instance of the <see cref="NativeDeviceContext"/> class.
/// </summary>
/// <param name='handle'>
/// A <see cref="GCHandle"/> which is used to create the device context.
/// </param>
/// <exception cref='ArgumentNullException'>
/// Is thrown when an argument passed to a method is invalid because it is <see langword="null" /> .
/// </exception>
/// <exception cref='InvalidOperationException'>
/// Is thrown when an operation cannot be performed.
/// </exception>
public NativeDeviceContext(IntPtr handle)
{
if (handle == IntPtr.Zero)
{
throw new ArgumentException("handle is IntPtr.Zero");
}
#if false
// "Force" handle creation
if (!window.IsHandleCreated && window.Handle != IntPtr.Zero)
{
throw new InvalidOperationException("invalid handle");
}
#endif
if ((_Display = Egl.GetDisplay(new IntPtr(Egl.DEFAULT_DISPLAY))) == IntPtr.Zero)
{
throw new InvalidOperationException("unable to get display handle");
}
int[] major = new int[1], minor = new int[1];
if (Egl.Initialize(_Display, major, minor) == false)
{
throw new InvalidOperationException("unable to initialize the display");
}
_NativeWindow = handle;
_Version = new KhronosVersion(major[0], minor[0], KhronosVersion.ApiEgl);
}
/// <summary>
/// Initializes a new instance of the <see cref="NativeDeviceContext"/> class.
/// </summary>
/// <param name='window'>
/// Window.
/// </param>
/// <exception cref='ArgumentNullException'>
/// Is thrown when an argument passed to a method is invalid because it is <see langword="null" /> .
/// </exception>
/// <exception cref='InvalidOperationException'>
/// Is thrown when an operation cannot be performed.
/// </exception>
public NativeDeviceContext(Control window)
{
if (window == null)
{
throw new ArgumentNullException("window");
}
_Display = Egl.GetDisplay(IntPtr.Zero);
Egl.Initialize(_Display, null, null);
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="display">
/// A <see cref="IntPtr"/> that specifies the display handle to be passed to <see cref="Egl.GetDisplay(IntPtr)"/>.
/// </param>
protected NativeSurface(IntPtr display)
{
if ((_Display = Egl.GetDisplay(display)) == IntPtr.Zero)
{
throw new InvalidOperationException("unable to get display handle");
}
int[] major = new int[1], minor = new int[1];
if (Egl.Initialize(_Display, major, minor) == false)
{
throw new InvalidOperationException("unable to initialize the display");
}
_EglVersion = new KhronosVersion(major[0], minor[0], KhronosVersion.ApiEgl);
}
/// <summary>
/// Default constructor.
/// </summary>
protected NativeSurface()
{
try {
if ((_Display = Egl.GetDisplay(new IntPtr(Egl.DEFAULT_DISPLAY))) == IntPtr.Zero)
{
throw new InvalidOperationException("unable to get display handle");
}
int[] major = new int[1], minor = new int[1];
if (Egl.Initialize(_Display, major, minor) == false)
{
throw new InvalidOperationException("unable to initialize the display");
}
_EglVersion = new KhronosVersion(major[0], minor[0], KhronosVersion.ApiEgl);
} 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 = GetAssemblyLocation();
string anglePath = null;
switch (Platform.CurrentPlatformId)
{
case Platform.Id.WindowsNT:
if (assemblyPath != null)
{
#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
// Note: maybe a configurable and generic method for pre-loading assemblies may be introduced
GetProcAddressLinux.GetLibraryHandle("libGLESv2.so", false);
break;
}
// Include ANGLE path, if any
#if NETSTANDARD1_1
if (anglePath != String.Empty)
{
OpenGL.GetProcAddressOS.AddLibraryDirectory(Path.Combine(assemblyPath, anglePath));
}
#else
if (anglePath != null && Directory.Exists(anglePath))
{
OpenGL.GetProcAddressOS.AddLibraryDirectory(Path.Combine(assemblyPath, anglePath));
}
#endif
// Load procedures
BindAPI();
if (IsAvailable == false)
{
return;
}
#if DEBUG
string envEglInit = Environment.GetEnvironmentVariable("EGL_INIT");
if (envEglInit != null && envEglInit == "NO")
{
return;
}
#endif
// Platform initialization
EglEventArgs args = new EglEventArgs();
RaiseEglInitializing(args);
// Get EGL information
IntPtr eglDisplay = Egl.GetDisplay(args.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
List <string> clientApis = new List <string>();
if (_CurrentVersion >= Version_120)
{
string clientApisString = QueryString(eglDisplay, CLIENT_APIS);
string[] clientApiTokens = System.Text.RegularExpressions.Regex.Split(clientApisString, " ");
foreach (string api in DeviceContextEGL.ConvertApiNames(clientApiTokens))
{
clientApis.Add(api);
}
}
_AvailableApis = clientApis.ToArray();
// Null device context for querying extensions
using (DeviceContextEGL deviceContext = new DeviceContextEGL(args.Display, IntPtr.Zero)) {
_CurrentExtensions = new Extensions();
_CurrentExtensions.Query(deviceContext);
}
} finally {
Terminate(eglDisplay);
}
}
/// <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.GetLibraryHandle("libGLESv2.so", false);
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());
}
if (IsAvailable == false)
{
return;
}
#if DEBUG
string envEglInit = Environment.GetEnvironmentVariable("EGL_INIT");
if (envEglInit != null && envEglInit == "NO")
{
return;
}
#endif
// Platform initialization
EglEventArgs args = new EglEventArgs();
RaiseEglInitializing(args);
// Get EGL information
IntPtr eglDisplay = Egl.GetDisplay(args.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);
}
}
