public void swapColorAttachment(Framebuffer other, int index)
{
FramebufferTexture tmp = m_color[index];
m_color[index] = other.m_color[index];
other.m_color[index] = tmp;
glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, framebufferId[0]);
glFramebufferTexture2D(OpenGL.GL_FRAMEBUFFER,
attachment_id[index], m_color[index].TextureTarget, m_color[index].TextureId, 0);
glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, 0);
glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, other.framebufferId[0]);
glFramebufferTexture2D(OpenGL.GL_FRAMEBUFFER,
attachment_id[index], other.m_color[index].TextureTarget, other.m_color[index].TextureId, 0);
glBindFramebuffer(OpenGL.GL_FRAMEBUFFER, 0);
ErrorCode error = (ErrorCode)OpenGL.GetError();
if (error != ErrorCode.NoError)
{
throw new Exception(string.Format("OpenGL Error: {0}", error));
}
}
/// <summary>
/// Pick geometry at specified positon.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="pickTriangle"></param>
/// <param name="pickQuad"></param>
/// <param name="pickPolygon"></param>
/// <returns></returns>
public PickedGeometry Pick(int x, int y, bool pickTriangle, bool pickQuad, bool pickPolygon)
{
int width = this.Scene.Canvas.Width, height = this.Scene.Canvas.Height;
if (x < 0 || width <= x)
{
return(null);
}
if (y < 0 || height <= y)
{
return(null);
}
PickingGeometryTypes geometryTypes = 0;
if (pickTriangle)
{
geometryTypes |= PickingGeometryTypes.Triangle;
}
if (pickQuad)
{
geometryTypes |= PickingGeometryTypes.Quad;
}
if (pickPolygon)
{
geometryTypes |= PickingGeometryTypes.Polygon;
}
if (geometryTypes == 0)
{
return(null);
}
PickedGeometry pickedGeometry = null;
Framebuffer framebuffer = GetPickingFramebuffer();
framebuffer.Bind();
{
const float one = 1.0f;
GL.Instance.ClearColor(one, one, one, one);
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT);
var arg = new PickingEventArgs(this.Scene, x, y, geometryTypes);
this.RenderForPicking(this.Scene.RootElement, arg);
uint stageVertexId = ColorCodedPicking.ReadStageVertexId(x, y);
pickedGeometry = Pick(stageVertexId, arg, this.Scene.RootElement);
if (pickedGeometry != null)
{
var depth = new float[1];
GCHandle pinned = GCHandle.Alloc(depth, GCHandleType.Pinned);
IntPtr header = pinned.AddrOfPinnedObject();
// same with: IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
GL.Instance.ReadPixels(x, y, 1, 1, GL.GL_DEPTH_COMPONENT, GL.GL_FLOAT, header);
pinned.Free();
pickedGeometry.PickedPosition = new vec3(x, y, depth[0]);
}
}
framebuffer.Unbind();
return(pickedGeometry);
}
private static Framebuffer CreateFramebuffer(int width, int height)
{
Renderbuffer colorBuffer = Renderbuffer.CreateColorbuffer(width, height, OpenGL.GL_RGBA);
Renderbuffer depthBuffer = Renderbuffer.CreateDepthbuffer(width, height, DepthComponentType.DepthComponent24);
var framebuffer = new Framebuffer();
framebuffer.Bind();
framebuffer.Attach(colorBuffer);
framebuffer.Attach(depthBuffer);
framebuffer.CheckCompleteness();
return framebuffer;
}
//static List<WeakReference<FBORenderContext>> renderContextList = new List<WeakReference<FBORenderContext>>();
//public FBORenderContext()
//{
// renderContextList.Add(new WeakReference<FBORenderContext>(this));
//}
//public override void Destroy()
//{
// bool found = false;
// WeakReference<FBORenderContext> target = null;
// for (int index = 0; index < renderContextList.Count; index++)
// {
// target = renderContextList[index];
// FBORenderContext context;
// if (target.TryGetTarget(out context))
// {
// if (context == this)
// { break; }
// }
// }
// if (found)
// {
// renderContextList.Remove(target);
// }
// base.Destroy();
//}
//public static FBORenderContext GetCurrentRenderContext()
//{
// IntPtr renderContext = Win32.wglGetCurrentContext();
//}
/// <summary>
/// Creates the render context provider. Must also create the OpenGL extensions.
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="bitDepth"></param>
/// <param name="parameter"></param>
/// <returns></returns>
public override bool Create(int width, int height, int bitDepth, object parameter)
{
// Call the base class.
base.Create(width, height, bitDepth, parameter);
// Create frame buffer object.
Framebuffer framebuffer = CreateFramebuffer(width, height);
this.framebuffer = framebuffer;
// Create the DIB section.
var dibSection = new DIBSection();
dibSection.Create(this.DeviceContextHandle, width, height, bitDepth);
this.dibSection = dibSection;
return true;
}
/// <summary>
///
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
public override void SetDimensions(int width, int height)
{
// Call the base.
base.SetDimensions(width, height);
// Resize dib section.
this.dibSection.Resize(width, height, this.BitDepth);
// TODO: We should be able to just use the code below - however we
// get invalid dimension issues at the moment, so recreate for now.
//// Resize the render buffer storage.
//this.framebuffer.Resize(width, height);
this.framebuffer.Dispose();
Framebuffer framebuffer = CreateFramebuffer(width, height);
this.framebuffer = framebuffer;
}