/// <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>
/// <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)
{
if (attribsList == null)
{
throw new ArgumentNullException("attribsList");
}
if (attribsList.Length == 0)
{
throw new ArgumentException("zero length array", "attribsList");
}
if (attribsList[attribsList.Length - 1] != 0)
{
throw new ArgumentException("not zero-terminated array", "attribsList");
}
return(Wgl.CreateContextAttribsARB(DeviceContext, sharedContext, attribsList));
}
/// <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>
/// 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));
}