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using Avalonia;
using Avalonia.OpenGL;
using Avalonia.Platform;
using Avalonia.Rendering.SceneGraph;
using Avalonia.Skia;
using Avalonia.Threading;
using OpenTK.Graphics.OpenGL;
using Ryujinx.Common.Configuration;
using SkiaSharp;
using SPB.Graphics;
using SPB.Graphics.OpenGL;
using SPB.Platform;
using SPB.Windowing;
using System;
namespace Ryujinx.Ava.Ui.Controls
{
internal class OpenGLRendererControl : RendererControl
{
public int Major { get; }
public int Minor { get; }
public OpenGLContextBase GameContext { get; set; }
public static OpenGLContextBase PrimaryContext =>
AvaloniaLocator.Current.GetService<IPlatformOpenGlInterface>()
.PrimaryContext.AsOpenGLContextBase();
private SwappableNativeWindowBase _gameBackgroundWindow;
private IntPtr _fence;
public OpenGLRendererControl(int major, int minor, GraphicsDebugLevel graphicsDebugLevel) : base(graphicsDebugLevel)
{
Major = major;
Minor = minor;
}
public override void DestroyBackgroundContext()
{
_image = null;
if (_fence != IntPtr.Zero)
{
DrawOperation.Dispose();
GL.DeleteSync(_fence);
}
GlDrawOperation.DeleteFramebuffer();
GameContext?.Dispose();
_gameBackgroundWindow?.Dispose();
}
internal override void Present(object image)
{
Dispatcher.UIThread.InvokeAsync(() =>
{
Image = (int)image;
}).Wait();
if (_fence != IntPtr.Zero)
{
GL.DeleteSync(_fence);
}
_fence = GL.FenceSync(SyncCondition.SyncGpuCommandsComplete, WaitSyncFlags.None);
QueueRender();
_gameBackgroundWindow.SwapBuffers();
}
internal override void MakeCurrent()
{
GameContext.MakeCurrent(_gameBackgroundWindow);
}
internal override void MakeCurrent(SwappableNativeWindowBase window)
{
GameContext.MakeCurrent(window);
}
protected override void CreateWindow()
{
var flags = OpenGLContextFlags.Compat;
if (DebugLevel != GraphicsDebugLevel.None)
{
flags |= OpenGLContextFlags.Debug;
}
_gameBackgroundWindow = PlatformHelper.CreateOpenGLWindow(FramebufferFormat.Default, 0, 0, 100, 100);
_gameBackgroundWindow.Hide();
GameContext = PlatformHelper.CreateOpenGLContext(FramebufferFormat.Default, Major, Minor, flags, shareContext: PrimaryContext);
GameContext.Initialize(_gameBackgroundWindow);
}
protected override ICustomDrawOperation CreateDrawOperation()
{
return new GlDrawOperation(this);
}
private class GlDrawOperation : ICustomDrawOperation
{
private static int _framebuffer;
public Rect Bounds { get; }
private readonly OpenGLRendererControl _control;
public GlDrawOperation(OpenGLRendererControl control)
{
_control = control;
Bounds = _control.Bounds;
}
public void Dispose() { }
public static void DeleteFramebuffer()
{
if (_framebuffer == 0)
{
GL.DeleteFramebuffer(_framebuffer);
}
_framebuffer = 0;
}
public bool Equals(ICustomDrawOperation other)
{
return other is GlDrawOperation operation && Equals(this, operation) && operation.Bounds == Bounds;
}
public bool HitTest(Point p)
{
return Bounds.Contains(p);
}
private void CreateRenderTarget()
{
_framebuffer = GL.GenFramebuffer();
}
public void Render(IDrawingContextImpl context)
{
if (_control.Image == null)
{
return;
}
if (_framebuffer == 0)
{
CreateRenderTarget();
}
int currentFramebuffer = GL.GetInteger(GetPName.FramebufferBinding);
var image = _control.Image;
var fence = _control._fence;
GL.BindFramebuffer(FramebufferTarget.Framebuffer, _framebuffer);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, (int)image, 0);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, currentFramebuffer);
if (context is not ISkiaDrawingContextImpl skiaDrawingContextImpl)
{
return;
}
var imageInfo = new SKImageInfo((int)_control.RenderSize.Width, (int)_control.RenderSize.Height, SKColorType.Rgba8888);
var glInfo = new GRGlFramebufferInfo((uint)_framebuffer, SKColorType.Rgba8888.ToGlSizedFormat());
GL.WaitSync(fence, WaitSyncFlags.None, ulong.MaxValue);
using var backendTexture = new GRBackendRenderTarget(imageInfo.Width, imageInfo.Height, 1, 0, glInfo);
using var surface = SKSurface.Create(skiaDrawingContextImpl.GrContext, backendTexture, GRSurfaceOrigin.BottomLeft, SKColorType.Rgba8888);
if (surface == null)
{
return;
}
var rect = new Rect(new Point(), _control.RenderSize);
using var snapshot = surface.Snapshot();
skiaDrawingContextImpl.SkCanvas.DrawImage(snapshot, rect.ToSKRect(), _control.Bounds.ToSKRect(), new SKPaint());
}
}
}
}
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