public void Dispose()
{
if (_disposed)
{
return;
}
_disposed = true;
_gl.DeleteFramebuffer(_framebuffer);
_gl.DeleteRenderbuffer(_depthBuffer);
_gl.DeleteRenderbuffer(_renderbuffer);
if (_context != EAGLContext.CurrentContext)
{
throw new InvalidOperationException("Associated EAGLContext is not current");
}
}
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
});
}
void EnsureDepthBufferAttachment(GlInterface gl)
{
var size = GetPixelSize();
if (size == _depthBufferSize && _depthBuffer != 0)
{
return;
}
gl.GetIntegerv(GL_RENDERBUFFER_BINDING, out var oldRenderBuffer);
if (_depthBuffer != 0)
{
gl.DeleteRenderbuffer(_depthBuffer);
}
_depthBuffer = gl.GenRenderbuffer();
gl.BindRenderbuffer(GL_RENDERBUFFER, _depthBuffer);
gl.RenderbufferStorage(GL_RENDERBUFFER,
GlVersion.Type == GlProfileType.OpenGLES ? GL_DEPTH_COMPONENT16 : GL_DEPTH_COMPONENT,
size.Width, size.Height);
gl.FramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, _depthBuffer);
gl.BindRenderbuffer(GL_RENDERBUFFER, oldRenderBuffer);
}