/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
if (_Handle != IntPtr.Zero) {
if (Wgl.CurrentExtensions.Pbuffer_ARB) {
bool res = Wgl.DestroyPbufferARB(_Handle);
Debug.Assert(res);
} else {
bool res = Wgl.DestroyPbufferEXT(_Handle);
Debug.Assert(res);
}
_Handle = IntPtr.Zero;
}
if (_DeviceContext != IntPtr.Zero) {
Wgl.ReleaseDC(IntPtr.Zero, _DeviceContext);
_DeviceContext = IntPtr.Zero;
}
}
/// <summary>
/// Set the device pixel format.
/// </summary>
/// <param name="pixelFormat">
/// A <see cref="DevicePixelFormat"/> that specifies the pixel format to set.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="pixelFormat"/> is null.
/// </exception>
public override void SetPixelFormat(DevicePixelFormat pixelFormat)
{
if (pixelFormat == null)
{
throw new ArgumentNullException("pixelFormat");
}
if (_PixelFormatSet == true)
{
throw new InvalidOperationException("pixel format already set");
}
#if CHOOSE_PIXEL_FORMAT_FALLBACK
try {
#endif
Wgl.PIXELFORMATDESCRIPTOR pDescriptor = new Wgl.PIXELFORMATDESCRIPTOR();
// Note (from MSDN): Setting the pixel format of a window more than once can lead to significant complications for the Window Manager
// and for multithread applications, so it is not allowed. An application can only set the pixel format of a window one time. Once a
// window's pixel format is set, it cannot be changed.
if (!Wgl.DescribePixelFormat(_DeviceContext, pixelFormat.FormatIndex, (uint)pDescriptor.nSize, ref pDescriptor))
{
throw new InvalidOperationException(String.Format("unable to describe pixel format {0}", pixelFormat.FormatIndex), GetPlatformException());
}
// Set choosen pixel format
if (!Wgl.SetPixelFormat(_DeviceContext, pixelFormat.FormatIndex, ref pDescriptor))
{
throw new InvalidOperationException(String.Format("unable to set pixel format {0}: {1}", pixelFormat.FormatIndex), GetPlatformException());
}
#if CHOOSE_PIXEL_FORMAT_FALLBACK
}
catch (InvalidOperationException) {
// Try using default ChoosePixelFormat*
SetDisplayablePixelFormat(pixelFormat);
}
#endif
// Unable to set pixel format again
_PixelFormatSet = true;
}
private DevicePixelFormatCollection GetPixelFormats_Win32()
{
DevicePixelFormatCollection pixelFormats = new DevicePixelFormatCollection();
Wgl.PIXELFORMATDESCRIPTOR pixelDescr = new Wgl.PIXELFORMATDESCRIPTOR();
int pixelFormatsCount = Wgl.DescribePixelFormat(_DeviceContext, 0, 0, ref pixelDescr);
for (int i = 1; i <= pixelFormatsCount; i++) {
Wgl.DescribePixelFormat(_DeviceContext, i, (uint)Marshal.SizeOf(typeof(Wgl.PIXELFORMATDESCRIPTOR)), ref pixelDescr);
if ((pixelDescr.dwFlags & Wgl.PixelFormatDescriptorFlags.SupportOpenGL) == 0)
continue;
DevicePixelFormat pixelFormat = new DevicePixelFormat();
pixelFormat.FormatIndex = i;
pixelFormat.RgbaUnsigned = true;
pixelFormat.RgbaFloat = false;
pixelFormat.RenderWindow = true;
pixelFormat.RenderBuffer = false;
pixelFormat.DoubleBuffer = (pixelDescr.dwFlags & Wgl.PixelFormatDescriptorFlags.Doublebuffer) != 0;
pixelFormat.SwapMethod = 0;
pixelFormat.StereoBuffer = (pixelDescr.dwFlags & Wgl.PixelFormatDescriptorFlags.Stereo) != 0;
pixelFormat.ColorBits = pixelDescr.cColorBits;
pixelFormat.DepthBits = pixelDescr.cDepthBits;
pixelFormat.StencilBits = pixelDescr.cStencilBits;
pixelFormat.MultisampleBits = 0;
pixelFormat.RenderPBuffer = false;
pixelFormat.SRGBCapable = false;
pixelFormats.Add(pixelFormat);
}
return (pixelFormats);
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsDeviceContext"/> 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 WindowsDeviceContext(Control window)
{
if (window == null)
{
throw new ArgumentNullException("window");
}
// "Force" handle creation
if (!window.IsHandleCreated && window.Handle != IntPtr.Zero)
{
throw new InvalidOperationException("invalid handle");
}
_WindowHandle = window.Handle;
_DeviceContext = Wgl.GetDC(window.Handle);
if (DeviceContext == IntPtr.Zero)
{
throw new InvalidOperationException("unable to get any video device context");
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting managed/unmanaged resources.
/// </summary>
/// <param name="disposing">
/// A <see cref="System.Boolean"/> indicating whether the disposition is requested explictly.
/// </param>
protected override void Dispose(bool disposing)
{
if (disposing) {
// Release device context
if (_DeviceContext != IntPtr.Zero) {
if (_DeviceContextPBuffer == false) {
bool res = Wgl.ReleaseDC(_WindowHandle, _DeviceContext);
Debug.Assert(res);
} else {
int res = Wgl.ReleasePbufferDCARB(_WindowHandle, _DeviceContext);
Debug.Assert(res == 1);
}
_DeviceContext = IntPtr.Zero;
_WindowHandle = IntPtr.Zero;
}
}
// Base implementation
base.Dispose(disposing);
}
/// <summary>
/// Construct a NativePBuffer with a specific pixel format and size.
/// </summary>
/// <param name="pixelFormat">
/// A <see cref="DevicePixelFormat"/> that specifies the pixel format and the ancillary buffers required.
/// </param>
/// <param name="width">
/// A <see cref="UInt32"/> that specifies the width of the P-Buffer, in pixels.
/// </param>
/// <param name="height">
/// A <see cref="UInt32"/> that specifies the height of the P-Buffer, in pixels.
/// </param>
public NativePBuffer(DevicePixelFormat pixelFormat, uint width, uint height)
{
if (pixelFormat == null)
{
throw new ArgumentNullException("pixelFormat");
}
if (!Wgl.CurrentExtensions.Pbuffer_ARB && !Wgl.CurrentExtensions.Pbuffer_EXT)
{
throw new NotSupportedException("WGL_(ARB|EXT)_pbuffer not implemented");
}
try {
// Uses screen device context
_DeviceContext = Wgl.GetDC(Gl._NativeWindow.Handle);
// Choose appropriate pixel format
pixelFormat.RenderWindow = false; // XXX
pixelFormat.RenderPBuffer = true;
pixelFormat.DoubleBuffer = true;
int pixelFormatIndex = ChoosePixelFormat(_DeviceContext, pixelFormat);
if (Wgl.CurrentExtensions.Pbuffer_ARB)
{
_Handle = Wgl.CreatePbufferARB(_DeviceContext, pixelFormatIndex, (int)width, (int)height, new int[] { 0 });
}
else
{
_Handle = Wgl.CreatePbufferEXT(_DeviceContext, pixelFormatIndex, (int)width, (int)height, new int[] { 0 });
}
if (_Handle == IntPtr.Zero)
{
throw new InvalidOperationException("unable to create P-Buffer", GetPlatformExceptionCore());
}
} catch {
Dispose();
throw;
}
}
/// <summary>
/// Set the device pixel format.
/// </summary>
/// <param name="pixelFormat">
/// A <see cref="DevicePixelFormat"/> that specifies the pixel format to set.
/// </param>
private static int ChoosePixelFormat(IntPtr deviceContext, DevicePixelFormat pixelFormat)
{
if (pixelFormat == null)
throw new ArgumentNullException("pixelFormat");
List<int> attribIList = new List<int>();
List<float> attribFList = new List<float>();
uint[] countFormatAttribsValues = new uint[1];
int[] choosenFormats = new int[4];
attribIList.AddRange(new int[] { Wgl.SUPPORT_OPENGL_ARB, Gl.TRUE });
if (pixelFormat.RenderWindow)
attribIList.AddRange(new int[] { Wgl.DRAW_TO_WINDOW_ARB, Gl.TRUE });
if (pixelFormat.RenderPBuffer)
attribIList.AddRange(new int[] { Wgl.DRAW_TO_PBUFFER_ARB, Gl.TRUE });
if (pixelFormat.RgbaUnsigned)
attribIList.AddRange(new int[] { Wgl.PIXEL_TYPE_ARB, Wgl.TYPE_RGBA_ARB });
if (pixelFormat.RgbaFloat)
attribIList.AddRange(new int[] { Wgl.PIXEL_TYPE_ARB, Wgl.TYPE_RGBA_FLOAT_ARB });
if (pixelFormat.ColorBits > 0)
attribIList.AddRange(new int[] { Wgl.COLOR_BITS_ARB, pixelFormat.ColorBits });
if (pixelFormat.DepthBits > 0)
attribIList.AddRange(new int[] { Wgl.DEPTH_BITS_ARB, pixelFormat.DepthBits });
if (pixelFormat.StencilBits > 0)
attribIList.AddRange(new int[] { Wgl.STENCIL_BITS_ARB, pixelFormat.StencilBits });
if (pixelFormat.DoubleBuffer)
attribIList.AddRange(new int[] { Wgl.DOUBLE_BUFFER_ARB, pixelFormat.StencilBits });
attribIList.Add(0);
// Let choose pixel formats
if (!Wgl.ChoosePixelFormatARB(deviceContext, attribIList.ToArray(), attribFList.ToArray(), (uint)choosenFormats.Length, choosenFormats, countFormatAttribsValues))
throw new InvalidOperationException("unable to choose pixel format", GetPlatformExceptionCore());
return (choosenFormats[0]);
}
/// <summary>
/// Initialize LTS information for the calling thread.
/// </summary>
public static void InitializeThread()
{
#if !MONODROID
if (Egl.IsRequired == false)
{
switch (Platform.CurrentPlatformId)
{
case Platform.Id.WindowsNT:
Wgl.BindAPI();
break;
case Platform.Id.Linux:
Glx.BindAPI();
break;
case Platform.Id.MacOS:
if (Glx.IsRequired)
{
Glx.BindAPI();
}
else
{
throw new NotSupportedException("platform MacOS not supported without Glx.IsRequired=true");
}
break;
case Platform.Id.Android:
Egl.BindAPI();
break;
default:
throw new NotSupportedException(String.Format("platform {0} not supported", Platform.CurrentPlatformId));
}
}
else
#endif
Egl.BindAPI();
}
/// <summary>
/// Creates a context.
/// </summary>
/// <param name="sharedContext">
/// A <see cref="IntPtr"/> that specify a context that will share objects with the returned one. If
/// it is IntPtr.Zero, no sharing is performed.
/// </param>
/// <returns>
/// A <see cref="IntPtr"/> that represents the handle of the created context. If the context cannot be
/// created, it returns IntPtr.Zero.
/// </returns>
/// <exception cref="InvalidOperationException">
/// Exception thrown in the case <paramref name="sharedContext"/> is different from IntPtr.Zero, and the objects
/// cannot be shared with it.
/// </exception>
public override IntPtr CreateContext(IntPtr sharedContext)
{
IntPtr renderContext = IntPtr.Zero;
try {
renderContext = Wgl.CreateContext(DeviceContext);
if ((renderContext != IntPtr.Zero) && (sharedContext != IntPtr.Zero))
{
bool res = Wgl.ShareLists(renderContext, sharedContext);
Debug.Assert(res);
}
return(renderContext);
} catch {
if (renderContext != IntPtr.Zero)
{
bool res = Wgl.DeleteContext(renderContext);
Debug.Assert(res);
}
throw;
}
}
/// <summary>
/// Set pixel format by letting the driver choose the best pixel format following the criteria.
/// </summary>
/// <param name="pixelFormat">
///
/// </param>
private void SetDisplayablePixelFormat(DevicePixelFormat pixelFormat)
{
if (pixelFormat == null)
throw new ArgumentNullException("pixelFormat");
List<int> attribIList = new List<int>();
List<float> attribFList = new List<float>();
Wgl.PIXELFORMATDESCRIPTOR pDescriptor = new Wgl.PIXELFORMATDESCRIPTOR();
uint[] countFormatAttribsValues = new uint[1];
int[] choosenFormats = new int[4];
// Let choose pixel formats
if (!Wgl.ChoosePixelFormatARB(_DeviceContext, attribIList.ToArray(), attribFList.ToArray(), (uint)choosenFormats.Length, choosenFormats, countFormatAttribsValues)) {
Win32Exception innerException = new Win32Exception(Marshal.GetLastWin32Error());
throw new InvalidOperationException(String.Format("unable to choose pixel format: {0}", innerException.Message), innerException);
}
// Set choosen pixel format
if (Wgl.SetPixelFormat(_DeviceContext, choosenFormats[0], ref pDescriptor) == false) {
Win32Exception innerException = new Win32Exception(Marshal.GetLastWin32Error());
throw new InvalidOperationException(String.Format("unable to set pixel format {0}: {1}", pixelFormat.FormatIndex, innerException.Message), innerException);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="DeviceContextWGL"/> class.
/// </summary>
/// <param name='nativeBuffer'>
/// A <see cref="INativePBuffer"/> that specifies the P-Buffer used to create the device context.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="nativeBuffer"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="nativeBuffer"/> is not an instance created by
/// <see cref="DeviceContext.CreatePBuffer(DevicePixelFormat, uint, uint)"/>.
/// </exception>
/// <exception cref='InvalidOperationException'>
/// Is thrown when an operation cannot be performed.
/// </exception>
public DeviceContextWGL(INativePBuffer nativeBuffer)
{
if (nativeBuffer == null)
{
throw new ArgumentNullException("nativeBuffer");
}
NativePBuffer nativePBuffer = nativeBuffer as NativePBuffer;
if (nativePBuffer == null)
{
throw new ArgumentException("INativePBuffer not created with DeviceContext.CreatePBuffer");
}
if (!Wgl.CurrentExtensions.Pbuffer_ARB && !Wgl.CurrentExtensions.Pbuffer_EXT)
{
throw new InvalidOperationException("WGL_(ARB|EXT)_pbuffer not supported");
}
_WindowHandle = nativePBuffer.Handle;
if (Wgl.CurrentExtensions.Pbuffer_ARB)
{
_DeviceContext = Wgl.GetPbufferDCARB(nativePBuffer.Handle);
}
else
{
_DeviceContext = Wgl.GetPbufferDCEXT(nativePBuffer.Handle);
}
if (_DeviceContext == IntPtr.Zero)
{
throw new InvalidOperationException("unable to get device context");
}
_DeviceContextPBuffer = true;
}
/// <summary>
/// Creates a context, specifying attributes.
/// </summary>
/// <param name="sharedContext">
/// A <see cref="IntPtr"/> that specify a context that will share objects with the returned one. If
/// it is IntPtr.Zero, no sharing is performed.
/// </param>
/// <param name="attribsList">
/// A <see cref="T:Int32[]"/> that specifies the attributes list.
/// </param>
/// <param name="api">
/// A <see cref="KhronosVersion"/> that specifies the API to be implemented by the returned context. It can be null indicating the
/// default API for this DeviceContext implementation. If it is possible, try to determine the API version also.
/// </param>
/// <returns>
/// A <see cref="IntPtr"/> that represents the handle of the created context. If the context cannot be
/// created, it returns IntPtr.Zero.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <see cref="attribsList"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="attribsList"/> length is zero or if the last item of <paramref name="attribsList"/>
/// is not zero.
/// </exception>
public override IntPtr CreateContextAttrib(IntPtr sharedContext, int[] attribsList, KhronosVersion api)
{
if ((attribsList != null) && (attribsList.Length == 0))
{
throw new ArgumentException("zero length array", "attribsList");
}
if ((attribsList != null) && (attribsList[attribsList.Length - 1] != 0))
{
throw new ArgumentException("not zero-terminated array", "attribsList");
}
if (api != null && api.Api != KhronosVersion.ApiGl)
{
List <int> adulteredAttribs = new List <int>(attribsList);
// Support check
switch (api.Api)
{
case KhronosVersion.ApiGles1:
case KhronosVersion.ApiGles2:
if (Wgl.CurrentExtensions.CreateContextEsProfile_EXT == false)
{
throw new NotSupportedException("OpenGL ES API not supported");
}
break;
default:
throw new NotSupportedException(String.Format("'{0}' API not supported", api.Api));
}
// Remove trailing 0
if (adulteredAttribs.Count > 0 && adulteredAttribs[adulteredAttribs.Count - 1] == Gl.NONE)
{
adulteredAttribs.RemoveAt(adulteredAttribs.Count - 1);
}
// Add required attributes
int majorVersionIndex = adulteredAttribs.FindIndex(delegate(int item) { return(item == Wgl.CONTEXT_MAJOR_VERSION_ARB); });
int minorVersionIndex = adulteredAttribs.FindIndex(delegate(int item) { return(item == Wgl.CONTEXT_MINOR_VERSION_ARB); });
int profileMaskIndex = adulteredAttribs.FindIndex(delegate(int item) { return(item == Wgl.CONTEXT_PROFILE_MASK_ARB); });
if (majorVersionIndex < 0)
{
adulteredAttribs.AddRange(new int[] { Gl.MAJOR_VERSION, api.Major });
majorVersionIndex = adulteredAttribs.Count - 2;
}
if (minorVersionIndex < 0)
{
adulteredAttribs.AddRange(new int[] { Gl.MINOR_VERSION, api.Minor });
minorVersionIndex = adulteredAttribs.Count - 2;
}
if (profileMaskIndex < 0)
{
adulteredAttribs.AddRange(new int[] { Gl.CONTEXT_PROFILE_MASK, 0 });
profileMaskIndex = adulteredAttribs.Count - 2;
}
switch (api.Api)
{
case KhronosVersion.ApiGles1:
// Ignore API version: force always to 1.0
adulteredAttribs[majorVersionIndex + 1] = 1;
adulteredAttribs[minorVersionIndex + 1] = 0;
adulteredAttribs[profileMaskIndex + 1] |= (int)Wgl.CONTEXT_ES_PROFILE_BIT_EXT;
break;
case KhronosVersion.ApiGles2:
// Uses API version: it may be greater than 2.0(?)
adulteredAttribs[majorVersionIndex + 1] = 2;
adulteredAttribs[minorVersionIndex + 1] = 0;
adulteredAttribs[profileMaskIndex + 1] |= (int)Wgl.CONTEXT_ES_PROFILE_BIT_EXT;
break;
default:
Debug.Fail("API not implemented");
throw new NotSupportedException(String.Format("'{0}' API not supported", api.Api));
}
// Restore trailing 0
adulteredAttribs.Add(Gl.NONE);
return(Wgl.CreateContextAttribsARB(_DeviceContext, sharedContext, adulteredAttribs.ToArray()));
}
else
{
return(Wgl.CreateContextAttribsARB(_DeviceContext, sharedContext, attribsList));
}
}
/// <summary>
/// Control the the buffers swap of a device.
/// </summary>
/// <param name="interval">
/// A <see cref="System.Int32"/> that specifies the minimum number of video frames that are displayed
/// before a buffer swap will occur.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful.
/// </returns>
public override bool SwapInterval(int interval)
{
return(Wgl.SwapIntervalEXT(interval));
}
private DevicePixelFormatCollection GetPixelFormats_ARB_pixel_format(Wgl.Extensions wglExtensions)
{
// Get the number of pixel formats
int[] countFormatAttribsCodes = new int[] { Wgl.NUMBER_PIXEL_FORMATS_ARB };
int[] countFormatAttribsValues = new int[countFormatAttribsCodes.Length];
Wgl.GetPixelFormatAttribARB(_DeviceContext, 1, 0, (uint)countFormatAttribsCodes.Length, countFormatAttribsCodes, countFormatAttribsValues);
// Request configurations
List<int> pixelFormatAttribsCodes = new List<int>(12);
// Minimum requirements
pixelFormatAttribsCodes.Add(Wgl.SUPPORT_OPENGL_ARB); // Required to be Gl.TRUE
pixelFormatAttribsCodes.Add(Wgl.ACCELERATION_ARB); // Required to be Wgl.FULL_ACCELERATION or Wgl.ACCELERATION_ARB
pixelFormatAttribsCodes.Add(Wgl.PIXEL_TYPE_ARB);
// Buffer destination
pixelFormatAttribsCodes.Add(Wgl.DRAW_TO_WINDOW_ARB);
pixelFormatAttribsCodes.Add(Wgl.DRAW_TO_BITMAP_ARB);
// Multiple buffers
pixelFormatAttribsCodes.Add(Wgl.DOUBLE_BUFFER_ARB);
pixelFormatAttribsCodes.Add(Wgl.SWAP_METHOD_ARB);
pixelFormatAttribsCodes.Add(Wgl.STEREO_ARB);
// Pixel description
pixelFormatAttribsCodes.Add(Wgl.COLOR_BITS_ARB);
pixelFormatAttribsCodes.Add(Wgl.DEPTH_BITS_ARB);
pixelFormatAttribsCodes.Add(Wgl.STENCIL_BITS_ARB);
#if SUPPORT_MULTISAMPLE
// Multisample extension
if (wglExtensions.Multisample_ARB || wglExtensions.Multisample_EXT) {
pixelFormatAttribsCodes.Add(Wgl.SAMPLE_BUFFERS_ARB);
pixelFormatAttribsCodes.Add(Wgl.SAMPLES_ARB);
}
int pixelFormatAttribMultisampleIndex = pixelFormatAttribsCodes.Count - 1;
#endif
#if SUPPORT_PBUFFER
if (wglExtensions.Pbuffer_ARB || wglExtensions.Pbuffer_EXT) {
pixelFormatAttribsCodes.Add(Wgl.DRAW_TO_PBUFFER_ARB);
}
int pixelFormatAttribPBufferIndex = pixelFormatAttribsCodes.Count - 1;
#endif
#if SUPPORT_FRAMEBUFFER_SRGB
// Framebuffer sRGB extension
if (wglExtensions.FramebufferSRGB_ARB || wglExtensions.FramebufferSRGB_EXT)
pixelFormatAttribsCodes.Add(Wgl.FRAMEBUFFER_SRGB_CAPABLE_ARB);
int pixelFormatAttribFramebufferSrgbIndex = pixelFormatAttribsCodes.Count - 1;
#endif
// Create pixel format collection
DevicePixelFormatCollection pixelFormats = new DevicePixelFormatCollection();
// Retrieve information about available pixel formats
int[] pixelFormatAttribValues = new int[pixelFormatAttribsCodes.Count];
for (int pixelFormatIndex = 1; pixelFormatIndex < countFormatAttribsValues[0]; pixelFormatIndex++) {
DevicePixelFormat pixelFormat = new DevicePixelFormat();
Wgl.GetPixelFormatAttribARB(_DeviceContext, pixelFormatIndex, 0, (uint)pixelFormatAttribsCodes.Count, pixelFormatAttribsCodes.ToArray(), pixelFormatAttribValues);
// Check minimum requirements
if (pixelFormatAttribValues[0] != Gl.TRUE)
continue; // No OpenGL support
if (pixelFormatAttribValues[1] != Wgl.FULL_ACCELERATION_ARB)
continue; // No hardware acceleration
switch (pixelFormatAttribValues[2]) {
case Wgl.TYPE_RGBA_ARB:
#if SUPPORT_PIXEL_FORMAT_FLOAT
case Wgl.TYPE_RGBA_FLOAT_ARB:
#endif
#if SUPPORT_PIXEL_FORMAT_PACKED_FLOAT
case Wgl.TYPE_RGBA_UNSIGNED_FLOAT_EXT:
#endif
break;
default:
continue; // Ignored pixel type
}
// Collect pixel format attributes
pixelFormat.FormatIndex = pixelFormatIndex;
switch (pixelFormatAttribValues[2]) {
case Wgl.TYPE_RGBA_ARB:
pixelFormat.RgbaUnsigned = true;
break;
case Wgl.TYPE_RGBA_FLOAT_ARB:
pixelFormat.RgbaFloat = true;
break;
case Wgl.TYPE_RGBA_UNSIGNED_FLOAT_EXT:
pixelFormat.RgbaFloat = pixelFormat.RgbaUnsigned = true;
break;
}
pixelFormat.RenderWindow = pixelFormatAttribValues[3] == Gl.TRUE;
pixelFormat.RenderBuffer = pixelFormatAttribValues[4] == Gl.TRUE;
pixelFormat.DoubleBuffer = pixelFormatAttribValues[5] == Gl.TRUE;
pixelFormat.SwapMethod = pixelFormatAttribValues[6];
pixelFormat.StereoBuffer = pixelFormatAttribValues[7] == Gl.TRUE;
pixelFormat.ColorBits = pixelFormatAttribValues[8];
pixelFormat.DepthBits = pixelFormatAttribValues[9];
pixelFormat.StencilBits = pixelFormatAttribValues[10];
#if SUPPORT_MULTISAMPLE
if (wglExtensions.Multisample_ARB || wglExtensions.Multisample_EXT) {
Debug.Assert(pixelFormatAttribMultisampleIndex >= 0);
pixelFormat.MultisampleBits = pixelFormatAttribValues[pixelFormatAttribMultisampleIndex];
}
#endif
#if SUPPORT_PBUFFER
if (wglExtensions.Pbuffer_ARB || wglExtensions.Pbuffer_EXT) {
Debug.Assert(pixelFormatAttribPBufferIndex >= 0);
pixelFormat.RenderPBuffer = pixelFormatAttribValues[pixelFormatAttribPBufferIndex] == Gl.TRUE;
}
#endif
#if SUPPORT_FRAMEBUFFER_SRGB
if (wglExtensions.FramebufferSRGB_ARB || wglExtensions.FramebufferSRGB_EXT) {
Debug.Assert(pixelFormatAttribFramebufferSrgbIndex >= 0);
pixelFormat.SRGBCapable = pixelFormatAttribValues[pixelFormatAttribFramebufferSrgbIndex] != 0;
}
#endif
pixelFormats.Add(pixelFormat);
}
return (pixelFormats);
}
/// <summary>
/// Creates a context, specifying attributes.
/// </summary>
/// <param name="sharedContext">
/// A <see cref="IntPtr"/> that specify a context that will share objects with the returned one. If
/// it is IntPtr.Zero, no sharing is performed.
/// </param>
/// <param name="attribsList">
/// A <see cref="T:Int32[]"/> that specifies the attributes list.
/// </param>
/// <param name="api">
/// A <see cref="KhronosVersion"/> that specifies the API to be implemented by the returned context. It can be null indicating the
/// default API for this DeviceContext implementation. If it is possible, try to determine the API version also.
/// </param>
/// <returns>
/// A <see cref="IntPtr"/> that represents the handle of the created context. If the context cannot be
/// created, it returns IntPtr.Zero.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <see cref="attribsList"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="attribsList"/> length is zero or if the last item of <paramref name="attribsList"/>
/// is not zero.
/// </exception>
public override IntPtr CreateContextAttrib(IntPtr sharedContext, int[] attribsList, KhronosVersion api)
{
if (Wgl.CurrentExtensions != null && Wgl.CurrentExtensions.CreateContext_ARB == false)
throw new InvalidOperationException("WGL_ARB_create_context not supported");
if ((attribsList != null) && (attribsList.Length == 0))
throw new ArgumentException("zero length array", "attribsList");
if ((attribsList != null) && (attribsList[attribsList.Length - 1] != Gl.NONE))
throw new ArgumentException("not zero-terminated array", "attribsList");
// Defaults null attributes
if (attribsList == null)
attribsList = new int[] { Gl.NONE };
if (api != null) {
List<int> adulteredAttribs = new List<int>(attribsList);
// Support check
switch (api.Api) {
case KhronosVersion.ApiGl:
break;
case KhronosVersion.ApiGles1:
case KhronosVersion.ApiGles2:
case KhronosVersion.ApiGlsc2:
if (Wgl.CurrentExtensions.CreateContextEsProfile_EXT == false)
throw new NotSupportedException("OpenGL ES API not supported");
break;
default:
throw new NotSupportedException(String.Format("'{0}' API not supported", api.Api));
}
// Remove trailing 0
if (adulteredAttribs.Count > 0 && adulteredAttribs[adulteredAttribs.Count - 1] == Gl.NONE)
adulteredAttribs.RemoveAt(adulteredAttribs.Count - 1);
// Add required attributes
int major = api.Major, minor = api.Minor, profileMask = 0;
switch (api.Api) {
case KhronosVersion.ApiGl:
switch (api.Profile) {
case KhronosVersion.ProfileCompatibility:
profileMask |= (int)Wgl.CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
break;
case KhronosVersion.ProfileCore:
profileMask |= (int)Wgl.CONTEXT_CORE_PROFILE_BIT_ARB;
break;
case null:
// No specific profile required, leaving the default (core profile)
break;
default:
throw new NotSupportedException(String.Format("'{0}' Profile not supported", api.Profile));
}
break;
case KhronosVersion.ApiGles1:
// Ignore API version: force always to 1.0
major = 1;
minor = 0;
profileMask |= (int)Wgl.CONTEXT_ES_PROFILE_BIT_EXT;
break;
case KhronosVersion.ApiGles2:
case KhronosVersion.ApiGlsc2:
major = 2;
minor = 0;
profileMask |= (int)Wgl.CONTEXT_ES_PROFILE_BIT_EXT;
break;
default:
Debug.Fail("API not implemented");
throw new NotSupportedException(String.Format("'{0}' API not supported", api.Api));
}
// Add/Replace attributes
int majorVersionIndex, minorVersionIndex, profileMaskIndex;
if ((majorVersionIndex = adulteredAttribs.FindIndex(delegate (int item) {
return (item == Wgl.CONTEXT_MAJOR_VERSION_ARB);
})) >= 0)
adulteredAttribs[majorVersionIndex + 1] = major;
else
adulteredAttribs.AddRange(new int[] { Wgl.CONTEXT_MAJOR_VERSION_ARB, major });
if ((minorVersionIndex = adulteredAttribs.FindIndex(delegate (int item) {
return (item == Wgl.CONTEXT_MINOR_VERSION_ARB);
})) >= 0)
adulteredAttribs[minorVersionIndex + 1] = minor;
else
adulteredAttribs.AddRange(new int[] { Wgl.CONTEXT_MINOR_VERSION_ARB, api.Minor });
if (profileMask != 0) {
if ((profileMaskIndex = adulteredAttribs.FindIndex(delegate (int item) {
return (item == Wgl.CONTEXT_PROFILE_MASK_ARB);
})) >= 0)
adulteredAttribs[profileMaskIndex + 1] = profileMask;
else
adulteredAttribs.AddRange(new int[] { Wgl.CONTEXT_PROFILE_MASK_ARB, profileMask });
}
// Restore trailing 0
adulteredAttribs.Add(Gl.NONE);
return (Wgl.CreateContextAttribsARB(_DeviceContext, sharedContext, adulteredAttribs.ToArray()));
} else
return (Wgl.CreateContextAttribsARB(_DeviceContext, sharedContext, attribsList));
}
/// <summary>
/// Makes the context current on the calling thread.
/// </summary>
/// <param name="ctx">
/// A <see cref="IntPtr"/> that specify the context to be current on the calling thread, bound to
/// thise device context. It can be IntPtr.Zero indicating that no context will be current.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful.
/// </returns>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
protected override bool MakeCurrentCore(IntPtr ctx)
{
return(Wgl.MakeCurrent(_DeviceContext, ctx));
}
/// <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;
#if !NETSTANDARD1_1
// Optional initialization
string envGlInit = Environment.GetEnvironmentVariable("OPENGL_NET_INIT");
if (envGlInit != null && envGlInit == "NO")
{
return;
}
#endif
// Environment options
LogComment("OpenGL.Net is initializing");
// Loader function OS API GL API
// ------------------------------------------------------
// Supported platform: Windows
// wglGetProcAddress WGL GL
// wglGetProcAddress WGL GLES2+ (with WGL_create_context_es(2)?_profile_EXT)
// eglGetProcAddress EGL(Angle) GLES2+
// ------------------------------------------------------
// Supported platform: Linux
// glXGetProcAddress GLX GL
// glXGetProcAddress GLX GLES2+ (with GLX_create_context_es(2)?_profile_EXT)
// eglGetProcAddress EGL GLES2+
// ------------------------------------------------------
// Supported platform: Android
// eglGetProcAddress EGL GL
// eglGetProcAddress EGL GLES2+
try {
#if !MONODROID
// Determine whether use EGL as device context backend
if (Egl.IsAvailable)
{
switch (Platform.CurrentPlatformId)
{
case Platform.Id.Linux:
if (Glx.IsAvailable == false)
{
Egl.IsRequired = true;
}
break;
}
}
#endif
// Create native window for getting preliminary information on desktop systems
// This instance will be used for creating contexts without explictly specify a window
_NativeWindow = DeviceContext.CreateHiddenWindow();
// Create device context
using (DeviceContext windowDevice = DeviceContext.Create()) {
// Create basic OpenGL context
IntPtr renderContext = windowDevice.CreateSimpleContext();
if (renderContext == IntPtr.Zero)
{
throw new NotImplementedException("unable to create a simple context");
}
// Make contect current
if (windowDevice.MakeCurrent(renderContext) == false)
{
throw new InvalidOperationException("unable to make current", windowDevice.GetPlatformException());
}
#if !MONODROID
// Reload platform function pointers, if required
if (Egl.IsRequired == false)
{
switch (Platform.CurrentPlatformId)
{
case Platform.Id.WindowsNT:
Wgl.BindAPI();
break;
}
}
#endif
// Query OpenGL informations
string glVersion = GetString(StringName.Version);
_CurrentVersion = KhronosVersion.Parse(glVersion);
// Query OpenGL extensions (current OpenGL implementation, CurrentCaps)
_CurrentExtensions = new Extensions();
_CurrentExtensions.Query();
// Query platform extensions
windowDevice.QueryPlatformExtensions();
// Query OpenGL limits
_CurrentLimits = Limits.Query(Gl.CurrentVersion, _CurrentExtensions);
// Obtain current OpenGL Shading Language version
string glslVersion = null;
switch (_CurrentVersion.Api)
{
case KhronosVersion.ApiGl:
if (_CurrentVersion >= Version_200 || _CurrentExtensions.ShadingLanguage100_ARB)
{
glslVersion = GetString(StringName.ShadingLanguageVersion);
}
break;
case KhronosVersion.ApiGles2:
glslVersion = GetString(StringName.ShadingLanguageVersion);
break;
}
if (glslVersion != null)
{
_CurrentShadingVersion = GlslVersion.Parse(glslVersion, _CurrentVersion.Api);
}
// Vendor/Render information
_Vendor = GetString(StringName.Vendor);
_Renderer = GetString(StringName.Renderer);
if (EnvDebug || EnvExperimental)
{
Debug.Assert(CurrentVersion != null && CurrentExtensions != null);
CheckExtensionCommands <Gl>(CurrentVersion, CurrentExtensions, EnvExperimental);
}
// Before deletion, make uncurrent
windowDevice.MakeCurrent(IntPtr.Zero);
// Detroy context
if (windowDevice.DeleteContext(renderContext) == false)
{
throw new InvalidOperationException("unable to delete OpenGL context");
}
}
LogComment("OpenGL.Net has been initialized");
} catch (Exception excepton) {
_InitializationException = excepton;
LogComment("Unable to initialize OpenGL.Net: {0}", _InitializationException.ToString());
}
}
/// <summary>
/// Makes the context current on the calling thread.
/// </summary>
/// <param name="ctx">
/// A <see cref="IntPtr"/> that specify the context to be current on the calling thread, bound to
/// thise device context. It can be IntPtr.Zero indicating that no context will be current.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful.
/// </returns>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public override bool MakeCurrent(IntPtr ctx)
{
return(Wgl.MakeCurrent(DeviceContext, ctx));
}
