//! On update window
protected override void OnUpdateFrame(FrameEventArgs e)
{
if (this._disposedValue)
{
return;
}
int i_read = (this._frame % 2) == 0 ? 1 : 0;
int i_write = (this._frame % 2) == 0 ? 1 : 0;
GL.Viewport(0, 0, this.Size.X, this.Size.Y);
_fbo.Textures[0].BindImage(1, ITexture.Access.Write);
float margin = 0.5f;
Color4 color = new Color4(0.5f, 1.0f, 0.25f, 1.0f);
float random_number = (float)_rand.Next(1000) / 1000.0f;
GL.ProgramUniform4(this._compute_prog.Object, 1, color);
GL.ProgramUniform1(this._compute_prog.Object, 2, margin);
GL.ProgramUniform1(this._compute_prog.Object, 3, random_number);
_compute_prog.Use();
this._frame++;
GL.DispatchCompute(1, 1, 1);
//GL.MemoryBarrier(MemoryBarrierFlags.ShaderImageAccessBarrierBit); // alternative: MemoryBarrierFlags.AllBarrierBits;
GL.MemoryBarrier(MemoryBarrierFlags.AllBarrierBits);
/* DEBUG output
* var data_ptr = GL.MapNamedBufferRange(this._coord_ssbo.Object, IntPtr.Zero, 8, BufferAccessMask.MapReadBit);
* float[] managedArray = new float[2];
* Marshal.Copy(data_ptr, managedArray, 0, 2);
* GL.UnmapNamedBuffer(this._coord_ssbo.Object);
* Console.WriteLine("data x: " + managedArray[0].ToString() + " y: " + managedArray[1].ToString());
*/
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
// Be aware, this won't work if the target framebuffer is a multisampling framebuffer
if (this.Size.X > this.Size.Y)
{
_fbo.Blit(null, (this.Size.X - this.Size.Y) / 2, 0, this.Size.Y, this.Size.Y, true);
}
else
{
_fbo.Blit(null, 0, (this.Size.Y - this.Size.X) / 2, this.Size.X, this.Size.X, true);
}
Context.SwapBuffers();
base.OnUpdateFrame(e);
}