public static LayerFbo TryCreate(EAGLContext context, GlInterface gl, CAEAGLLayer layer)
{
if (context != EAGLContext.CurrentContext)
{
return(null);
}
var rb = gl.GenRenderbuffer();
gl.BindRenderbuffer(GlConsts.GL_RENDERBUFFER, rb);
context.RenderBufferStorage(GlConsts.GL_RENDERBUFFER, layer);
var fb = gl.GenFramebuffer();
gl.BindFramebuffer(GlConsts.GL_FRAMEBUFFER, fb);
gl.FramebufferRenderbuffer(GlConsts.GL_FRAMEBUFFER, GlConsts.GL_COLOR_ATTACHMENT0, GlConsts.GL_RENDERBUFFER, rb);
gl.GetRenderbufferParameteriv(GlConsts.GL_RENDERBUFFER, GlConsts.GL_RENDERBUFFER_WIDTH, out var w);
gl.GetRenderbufferParameteriv(GlConsts.GL_RENDERBUFFER, GlConsts.GL_RENDERBUFFER_HEIGHT, out var h);
var db = gl.GenRenderbuffer();
//GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, depthBuffer);
//GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferInternalFormat.DepthComponent16, w, h);
gl.FramebufferRenderbuffer(GlConsts.GL_FRAMEBUFFER, GlConsts.GL_DEPTH_ATTACHMENT, GlConsts.GL_RENDERBUFFER, db);
var frameBufferError = gl.CheckFramebufferStatus(GlConsts.GL_FRAMEBUFFER);
if (frameBufferError != GlConsts.GL_FRAMEBUFFER_COMPLETE)
{
gl.DeleteFramebuffer(fb);
gl.DeleteRenderbuffer(db);
gl.DeleteRenderbuffer(rb);
return(null);
}
return(new LayerFbo(context, gl, layer, fb, rb, db)
{
Width = w,
Height = h
});
}