/// <summary>
/// Only valid to be called after the render context is created, this function attempts to
/// move the render context to the OpenGL version originally requested. If this is > 2.1, this
/// means building a new context. If this fails, we'll have to make do with 2.1.
/// </summary>
protected void UpdateContextVersion()
{
// If the request version number is anything up to and including 2.1, standard render contexts
// will provide what we need (as long as the graphics card drivers are up to date).
// Now the none-trivial case. We must use the WGL_ARB_create_context extension to
// attempt to create a 3.0+ context.
try
{
int[] attributes =
{
OpenGL.WGL_CONTEXT_MAJOR_VERSION_ARB, 2,
OpenGL.WGL_CONTEXT_MINOR_VERSION_ARB, 1,
OpenGL.WGL_CONTEXT_FLAGS_ARB, OpenGL.WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB, // compatible profile
#if DEBUG
OpenGL.WGL_CONTEXT_FLAGS_ARB, OpenGL.WGL_CONTEXT_DEBUG_BIT_ARB, // this is a debug context
#endif
0
};
IntPtr hrc = OpenGL.GetDelegateFor <OpenGL.wglCreateContextAttribsARB>()(this.DeviceContextHandle, IntPtr.Zero, attributes);
Win32.wglMakeCurrent(IntPtr.Zero, IntPtr.Zero);
Win32.wglDeleteContext(this.RenderContextHandle);
Win32.wglMakeCurrent(this.DeviceContextHandle, hrc);
this.RenderContextHandle = hrc;
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
/// <summary>
///
/// </summary>
protected virtual void DisposeUnmanagedResources()
{
// If we have a render context, destroy it.
if (this.RenderContextHandle != IntPtr.Zero)
{
Win32.wglDeleteContext(this.RenderContextHandle);
this.RenderContextHandle = IntPtr.Zero;
}
}
/// <summary>
/// Destroys the render context provider instance.
/// </summary>
public virtual void Destroy()
{
// If we have a render context, destroy it.
if (RenderContextHandle != IntPtr.Zero)
{
Win32.wglDeleteContext(RenderContextHandle);
RenderContextHandle = IntPtr.Zero;
}
}
/// <summary>
/// Destroys the render context provider instance.
/// </summary>
protected override void DisposeUnmanagedResources()
{
// Release the device context.
Win32.ReleaseDC(windowHandle, this.DeviceContextHandle);
// Destroy the window.
Win32.DestroyWindow(windowHandle);
// If we have a render context, destroy it.
if (this.RenderContextHandle != IntPtr.Zero)
{
Win32.wglDeleteContext(this.RenderContextHandle);
this.RenderContextHandle = IntPtr.Zero;
}
}
/// <summary>
/// Only valid to be called after the render context is created, this function attempts to
/// move the render context to the OpenGL version originally requested. If this is > 2.1, this
/// means building a new context. If this fails, we'll have to make do with 2.1.
/// </summary>
protected void UpdateContextVersion()
{
// If the request version number is anything up to and including 2.1, standard render contexts
// will provide what we need (as long as the graphics card drivers are up to date).
// Now the none-trivial case. We must use the WGL_create_context extension to
// attempt to create a 3.0+ context.
int major, minor;
GetHighestVersion(out major, out minor);
if ((major > 2) || (major == 2 && minor > 1))
{
try
{
//OpenGL.WGL_CONTEXT_MAJOR_VERSION_ARB, requestedVersionNumber.Major, kw
//OpenGL.WGL_CONTEXT_MINOR_VERSION_ARB, requestedVersionNumber.Minor,
//OpenGL.WGL_CONTEXT_FLAGS_ARB, OpenGL.WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
int[] attributes =
{
GL.WGL_CONTEXT_MAJOR_VERSION, major,
GL.WGL_CONTEXT_MINOR_VERSION, minor,
GL.WGL_CONTEXT_FLAGS, GL.WGL_CONTEXT_FORWARD_COMPATIBLE_BIT,// compatible profile
//#if DEBUG
// GL.WGL_CONTEXT_FLAGS, GL.WGL_CONTEXT_DEBUG_BIT,// this is a debug context
//#endif
0
};
var wglCreateContextAttribs = GL.Instance.GetDelegateFor("wglCreateContextAttribsARB", GLDelegates.typeof_IntPtr_IntPtr_IntPtr_intN) as GLDelegates.IntPtr_IntPtr_IntPtr_intN;
IntPtr hrc = wglCreateContextAttribs(this.DeviceContextHandle, IntPtr.Zero, attributes);
Win32.wglMakeCurrent(IntPtr.Zero, IntPtr.Zero);
Win32.wglDeleteContext(this.RenderContextHandle);
Win32.wglMakeCurrent(this.DeviceContextHandle, hrc);
this.RenderContextHandle = hrc;
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
}
/// <summary>
/// Only valid to be called after the render context is created, this function attempts to
/// move the render context to the OpenGL version originally requested. If this is > 2.1, this
/// means building a new context. If this fails, we'll have to make do with 2.1.
/// </summary>
protected void UpdateContextVersion()
{
// If the request version number is anything up to and including 2.1, standard render contexts
// will provide what we need (as long as the graphics card drivers are up to date).
var requestedVersionNumber = VersionAttribute.GetVersionAttribute(this.RequestedGLVersion);
if (requestedVersionNumber.IsAtLeastVersion(3, 0) == false)
{
this.CreatedGLVersion = this.RequestedGLVersion;
return;
}
// Now the none-trivial case. We must use the WGL_ARB_create_context extension to
// attempt to create a 3.0+ context.
try
{
int[] attributes =
{
OpenGL.WGL_CONTEXT_MAJOR_VERSION_ARB, requestedVersionNumber.Major,
OpenGL.WGL_CONTEXT_MINOR_VERSION_ARB, requestedVersionNumber.Minor,
OpenGL.WGL_CONTEXT_FLAGS_ARB, OpenGL.WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB, // compatible profile
#if DEBUG
OpenGL.WGL_CONTEXT_FLAGS_ARB, OpenGL.WGL_CONTEXT_DEBUG_BIT_ARB, // this is a debug context
#endif
0
};
IntPtr hrc = OpenGL.GetDelegateFor <OpenGL.wglCreateContextAttribsARB>()(this.DeviceContextHandle, IntPtr.Zero, attributes);
Win32.wglMakeCurrent(IntPtr.Zero, IntPtr.Zero);
Win32.wglDeleteContext(this.RenderContextHandle);
Win32.wglMakeCurrent(this.DeviceContextHandle, hrc);
this.RenderContextHandle = hrc;
}
catch (Exception)
{
// TODO: can we actually get the real version?
this.CreatedGLVersion = GLVersion.OpenGL2_1;
}
}
/// <summary>
/// Only valid to be called after the render context is created, this function attempts to
/// move the render context to the OpenGL version originally requested. If this is > 2.1, this
/// means building a new context. If this fails, we'll have to make do with 2.1.
/// </summary>
/// <param name="parameters"></param>
protected bool UpdateContextVersion(ContextGenerationParams parameters)
{
// If the request version number is anything up to and including 2.1, standard render contexts
// will provide what we need (as long as the graphics card drivers are up to date).
// Now the none-trivial case. We must use the WGL_create_context extension to
// attempt to create a 3.0+ context.
try
{
var wglChoosePixelFormatARB = GL.Instance.GetDelegateFor("wglChoosePixelFormatARB", GLDelegates.typeof_bool_IntPtr_intN_floatN_uint_intN_uintN) as GLDelegates.bool_IntPtr_intN_floatN_uint_intN_uintN;
if (wglChoosePixelFormatARB == null)
{
return(false);
}
var wglCreateContextAttribs = GL.Instance.GetDelegateFor("wglCreateContextAttribsARB", GLDelegates.typeof_IntPtr_IntPtr_IntPtr_intN) as GLDelegates.IntPtr_IntPtr_IntPtr_intN;
if (wglCreateContextAttribs == null)
{
return(false);
}
int major, minor;
GetHighestVersion(out major, out minor);
if ((major > 2) || (major == 2 && minor > 1))
{
int[] attribList = new int[]
{
WinGL.WGL_SUPPORT_OPENGL_ARB, (int)GL.GL_TRUE,
WinGL.WGL_DRAW_TO_WINDOW_ARB, (int)GL.GL_TRUE,
WinGL.WGL_DOUBLE_BUFFER_ARB, (int)GL.GL_TRUE,
WinGL.WGL_ACCELERATION_ARB, WinGL.WGL_FULL_ACCELERATION_ARB,
WinGL.WGL_PIXEL_TYPE_ARB, WinGL.WGL_TYPE_RGBA_ARB,
WinGL.WGL_COLOR_BITS_ARB, parameters.ColorBits,
WinGL.WGL_ACCUM_BITS_ARB, parameters.AccumBits,
WinGL.WGL_ACCUM_RED_BITS_ARB, parameters.AccumRedBits,
WinGL.WGL_ACCUM_GREEN_BITS_ARB, parameters.AccumGreenBits,
WinGL.WGL_ACCUM_BLUE_BITS_ARB, parameters.AccumBlueBits,
WinGL.WGL_ACCUM_ALPHA_BITS_ARB, parameters.AccumAlphaBits,
WinGL.WGL_DEPTH_BITS_ARB, parameters.DepthBits,
WinGL.WGL_STENCIL_BITS_ARB, parameters.StencilBits,
0, //End
};
IntPtr dc = this.DeviceContextHandle;
// Match an appropriate pixel format
int[] pixelFormat = new int[1];
uint[] numFormats = new uint[1];
if (false == wglChoosePixelFormatARB(dc, attribList, null, 1, pixelFormat, numFormats))
{
return(false);
}
// Sets the pixel format
if (false == Win32.SetPixelFormat(dc, pixelFormat[0], new PixelFormatDescriptor()))
{
return(false);
}
int[] attributes =
{
WinGL.WGL_CONTEXT_MAJOR_VERSION_ARB,
major,
WinGL.WGL_CONTEXT_MINOR_VERSION_ARB,
minor,
WinGL.WGL_CONTEXT_PROFILE_MASK_ARB,
WinGL.WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
//#if DEBUG
// GL.WGL_CONTEXT_FLAGS, GL.WGL_CONTEXT_DEBUG_BIT,// this is a debug context
//#endif
0
};
IntPtr hrc = wglCreateContextAttribs(dc, IntPtr.Zero, attributes);
Win32.wglMakeCurrent(IntPtr.Zero, IntPtr.Zero);
Win32.wglDeleteContext(this.RenderContextHandle);
Win32.wglMakeCurrent(dc, hrc);
this.RenderContextHandle = hrc;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
Log.Write(ex);
}
return(true);
}