public FrameBuffer(Size size)
{
this.size = size;
if (!Exts.IsPowerOf2(size.Width) || !Exts.IsPowerOf2(size.Height))
throw new InvalidDataException("Frame buffer size ({0}x{1}) must be a power of two".F(size.Width, size.Height));
GL.Ext.GenFramebuffers(1, out framebuffer);
ErrorHandler.CheckGlError();
GL.Ext.BindFramebuffer(FramebufferTarget.FramebufferExt, framebuffer);
ErrorHandler.CheckGlError();
// Color
texture = new Texture();
texture.SetEmpty(size.Width, size.Height);
GL.Ext.FramebufferTexture2D(FramebufferTarget.FramebufferExt, FramebufferAttachment.ColorAttachment0Ext, TextureTarget.Texture2D, texture.ID, 0);
ErrorHandler.CheckGlError();
// Depth
GL.Ext.GenRenderbuffers(1, out depth);
ErrorHandler.CheckGlError();
GL.Ext.BindRenderbuffer(RenderbufferTarget.RenderbufferExt, depth);
ErrorHandler.CheckGlError();
GL.Ext.RenderbufferStorage(RenderbufferTarget.RenderbufferExt, RenderbufferStorage.DepthComponent, size.Width, size.Height);
ErrorHandler.CheckGlError();
GL.Ext.FramebufferRenderbuffer(FramebufferTarget.FramebufferExt, FramebufferAttachment.DepthAttachmentExt, RenderbufferTarget.RenderbufferExt, depth);
ErrorHandler.CheckGlError();
// Test for completeness
var status = GL.Ext.CheckFramebufferStatus(FramebufferTarget.FramebufferExt);
if (status != FramebufferErrorCode.FramebufferCompleteExt)
{
var error = "Error creating framebuffer: {0}\n{1}".F(status, new StackTrace());
ErrorHandler.WriteGraphicsLog(error);
throw new InvalidOperationException("OpenGL Error: See graphics.log for details.");
}
// Restore default buffer
GL.Ext.BindFramebuffer(FramebufferTarget.FramebufferExt, 0);
ErrorHandler.CheckGlError();
}
