/// <summary>
/// Creates a <see cref="RenderbufferObject"/> with the specified format.
/// </summary>
/// <param name="graphicsDevice">The <see cref="GraphicsDevice"/> this resource will use.</param>
/// <param name="width">The width for the <see cref="RenderbufferObject"/>.</param>
/// <param name="height">The height for the <see cref="RenderbufferObject"/>.</param>
/// <param name="format">The format for the <see cref="RenderbufferObject"/>'s storage.</param>
/// <param name="samples">The amount of samples the <see cref="RenderbufferObject"/> will have.</param>
public RenderbufferObject(GraphicsDevice graphicsDevice, uint width, uint height, RenderbufferFormat format, uint samples = 0)
: base(graphicsDevice)
{
if (!Enum.IsDefined(typeof(RenderbufferFormat), format))
{
throw new ArgumentException("Invalid renderbuffer format", nameof(format));
}
if (width <= 0 || width > graphicsDevice.MaxRenderbufferSize)
{
throw new ArgumentOutOfRangeException(nameof(width), width, "Width must be in the range (0, " + nameof(graphicsDevice.MaxRenderbufferSize) + "]");
}
if (height <= 0 || height > graphicsDevice.MaxRenderbufferSize)
{
throw new ArgumentOutOfRangeException(nameof(height), height, "Height must be in the range (0, " + nameof(graphicsDevice.MaxRenderbufferSize) + "]");
}
ValidateSampleCount(samples);
Handle = GL.GenRenderbuffer();
Format = format;
Width = width;
Height = height;
Samples = samples;
graphicsDevice.ForceBindRenderbuffer(this);
GL.RenderbufferStorageMultisample(RenderbufferTarget.Renderbuffer, Samples, (InternalFormat)format, Width, Height);
}
/// <summary>
/// Returns whether the specified <see cref="RenderbufferFormat"/> represents a color renderable format.
/// </summary>
public static bool IsRenderbufferFormatColorRenderable(RenderbufferFormat format)
{
return(format == RenderbufferFormat.Color4b || format == RenderbufferFormat.Float ||
format == RenderbufferFormat.Float2 || format == RenderbufferFormat.Float4 ||
format == RenderbufferFormat.Int || format == RenderbufferFormat.Int2 ||
format == RenderbufferFormat.Int4 || format == RenderbufferFormat.UnsignedInt ||
format == RenderbufferFormat.UnsignedInt2 || format == RenderbufferFormat.UnsignedInt4);
}
public void RenderbufferStorage(RenderbufferType type, RenderbufferFormat internalFormat, int width, int height) => this.CallMethod <object>(RENDERBUFFER_STORAGE, type, internalFormat, width, height);
/// <summary>
/// Gets the default valid <see cref="FramebufferAttachmentPoint"/> for a <see cref="RenderbufferFormat"/>
/// (depth/stencil/depthstencil/color0).
/// </summary>
public static FramebufferAttachmentPoint GetCorrespondingRenderbufferFramebufferAttachmentPoint(RenderbufferFormat format)
{
if (IsRenderbufferFormatColorRenderable(format))
{
return(FramebufferAttachmentPoint.Color0);
}
if (IsRenderbufferFormatDepthOnly(format))
{
return(FramebufferAttachmentPoint.Depth);
}
if (IsRenderbufferFormatDepthStencil(format))
{
return(FramebufferAttachmentPoint.DepthStencil);
}
if (IsRenderbufferFormatStencilOnly(format))
{
return(FramebufferAttachmentPoint.Stencil);
}
throw new ArgumentException("Given " + nameof(RenderbufferFormat) + " has no default valid " + nameof(FramebufferAttachmentPoint));
}
/// <summary>
/// Returns whether the specified <see cref="RenderbufferFormat"/> represents a depth-stencil format.
/// </summary>
public static bool IsRenderbufferFormatDepthStencil(RenderbufferFormat format)
{
return(format == RenderbufferFormat.Depth24Stencil8 || format == RenderbufferFormat.Depth32fStencil8);
}
/// <summary>
/// Returns whether the specified <see cref="RenderbufferFormat"/> represents a stencil-only format.
/// </summary>
public static bool IsRenderbufferFormatStencilOnly(RenderbufferFormat format)
{
return(format == RenderbufferFormat.Stencil8);
}
/// <summary>
/// Returns whether the specified <see cref="RenderbufferFormat"/> represents a depth-only format.
/// </summary>
public static bool IsRenderbufferFormatDepthOnly(RenderbufferFormat format)
{
return(format == RenderbufferFormat.Depth16 || format == RenderbufferFormat.Depth24 || format == RenderbufferFormat.Depth32f);
}
