/// <summary>
/// Determines which version of OpenGL will be used by the context.
/// </summary>
private void InitOpenGLVersion(OpenGLGraphicsConfiguration configuration, out Version versionRequested, out Version versionRequired, out Boolean isGLES)
{
isGLES = (Ultraviolet.Platform == UltravioletPlatform.Android || Ultraviolet.Platform == UltravioletPlatform.iOS);
versionRequired = isGLES ? new Version(2, 0) : new Version(3, 1);
versionRequested = isGLES ? configuration.MinimumOpenGLESVersion : configuration.MinimumOpenGLVersion;
if (versionRequested != null && versionRequested < versionRequired)
{
versionRequested = versionRequired;
}
}
/// <summary>
/// Sets the OpenGL environment attributes which correspond to the application's OpenGL settings.
/// </summary>
private void InitOpenGLEnvironment(OpenGLGraphicsConfiguration configuration, Boolean isGLES)
{
if (!OpenGLEnvironment.RequestOpenGLProfile(isGLES))
{
OpenGLEnvironment.ThrowPlatformErrorException();
}
if (!OpenGLEnvironment.RequestDepthSize(configuration.BackBufferDepthSize))
{
OpenGLEnvironment.ThrowPlatformErrorException();
}
if (!OpenGLEnvironment.RequestStencilSize(configuration.BackBufferStencilSize))
{
OpenGLEnvironment.ThrowPlatformErrorException();
}
if (configuration.Use32BitFramebuffer)
{
if (!OpenGLEnvironment.Request32BitFramebuffer())
{
OpenGLEnvironment.ThrowPlatformErrorException();
}
}
else
{
if (!OpenGLEnvironment.Request24BitFramebuffer())
{
OpenGLEnvironment.ThrowPlatformErrorException();
}
}
if (configuration.SrgbBuffersEnabled)
{
if (!OpenGLEnvironment.RequestSrgbCapableFramebuffer())
{
OpenGLEnvironment.ThrowPlatformErrorException();
}
if (!OpenGLEnvironment.IsFramebufferSrgbCapable)
{
configuration.SrgbBuffersEnabled = false;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenGLGraphicsPlugin"/> class.
/// </summary>
/// <param name="configuration">The graphics configuration settings.</param>
public OpenGLGraphicsPlugin(OpenGLGraphicsConfiguration configuration = null)
{
this.configuration = configuration ?? OpenGLGraphicsConfiguration.Default;
}
