/// <summary>
/// Binds the framebuffer and all of the renderbuffers.
/// Clears the buffer bits and sets viewport size.
/// Perform all rendering after this call.
/// </summary>
public void Enable()
{
DrawBuffersEnum[] buffers = new DrawBuffersEnum[Attachments.Length];
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, BufferID);
for (int i = 0; i < Attachments.Length; i++)
{
Gl.BindTexture(TextureTarget.Texture2D, TextureID[i]);
Gl.FramebufferTexture(FramebufferTarget.Framebuffer, Attachments[i], TextureID[i], 0);
buffers[i] = (DrawBuffersEnum)Attachments[i];
}
if (Attachments.Length > 1)
{
Gl.DrawBuffers(Attachments.Length, buffers);
}
Gl.Viewport(0, 0, Size.Width, Size.Height);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
}
/// <summary>
/// Binds the framebuffer and all of the renderbuffers.
/// Clears the buffer bits and sets viewport size.
/// Perform all rendering after this call.
/// </summary>
/// <param name="clear">True to clear both the color and depth buffer bits of the FBO before enabling.</param>
public void Enable(bool clear = true)
{
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, BufferID);
if (Attachments.Length == 1)
{
Gl.BindTexture(TextureTarget.Texture2D, TextureID[0]);
Gl.FramebufferTexture(FramebufferTarget.Framebuffer, Attachments[0], TextureID[0], 0);
}
else
{
DrawBuffersEnum[] buffers = new DrawBuffersEnum[Attachments.Length];
for (int i = 0; i < Attachments.Length; i++)
{
Gl.BindTexture(TextureTarget.Texture2D, TextureID[i]);
Gl.FramebufferTexture(FramebufferTarget.Framebuffer, Attachments[i], TextureID[i], 0);
buffers[i] = (DrawBuffersEnum)Attachments[i];
}
Gl.BindTexture(TextureTarget.Texture2D, DepthID);
Gl.FramebufferTexture(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, DepthID, 0);
if (Attachments.Length > 1)
{
Gl.DrawBuffers(Attachments.Length, buffers);
}
}
Gl.Viewport(0, 0, Size.Width, Size.Height);
// configurably clear the buffer and color bits
if (clear)
{
if (Attachments.Length == 1 && Attachments[0] == FramebufferAttachment.DepthAttachment)
{
Gl.Clear(ClearBufferMask.DepthBufferBit);
}
else
{
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
}
}
}
/// <summary>
/// Clear surface buffers.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for clearing buffers.
/// </param>
/// <param name="bufferMask">
/// A <see cref="GraphicsBuffersFormat.BufferType"/> indicating which buffers to clear.
/// </param>
public void Clear(GraphicsContext ctx, GraphicsBuffersFormat.BufferType bufferMask)
{
// Update clear values (only what is necessary)
if ((bufferMask & GraphicsBuffersFormat.BufferType.Color) != 0)
{
Gl.ClearColor(mClearColor.Red, mClearColor.Green, mClearColor.Blue, mClearColor.Alpha);
}
if ((bufferMask & GraphicsBuffersFormat.BufferType.Depth) != 0)
{
Gl.ClearDepth(mClearDepth);
}
if ((bufferMask & GraphicsBuffersFormat.BufferType.Stencil) != 0)
{
Gl.ClearStencil(mClearStencil);
}
// Clear
Gl.Clear(GetClearFlags(bufferMask));
}
