love2dcs print image

ISSUE_75.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Love;
using Love.Misc;

class ISSUE_75
{
    class NoSce : Scene
    {
        public int w, h;
        public Action drawAction = null;
        public ImageData imageData;

        public override void Draw()
        {
            var canvas = Graphics.NewCanvas(w, h, new Graphics.Settings
            {
                readable = true,
                format = PixelFormat.RGBA8
            });
            Graphics.SetCanvas(canvas);
            drawAction?.Invoke();
            Graphics.SetCanvas();
            imageData = canvas.NewImageData();
            canvas.Dispose();
            canvas = null;
        }

        public override bool Quit()
        {
            return false;
        }

        public ImageData PrintImage(int w, int h, Action drawAction)
        {
            this.w = w;
            this.h = h;
            this.drawAction = drawAction;

            if (Graphics.IsActive())
            {
                Boot.SystemStep(this);
                var c = Graphics.GetBackgroundColor();
                Graphics.Clear(c.r, c.g, c.b, c.a);
                Graphics.Origin();
                this.Draw();
                Graphics.Present();
            }
            return this.imageData;
        }
    }
    static NoSce ns;

    static public void Init()
    {
        Boot.Init(new BootConfig
        {
            WindowResizable = false,
            WindowBorderless = true,
            WindowWidth = 1,
            WindowHeight = 1,
            WindowX = 0,
            WindowY = 0,
        });
        ns = new NoSce();
    }

    static public ImageData PrintImage(int w, int h, Action drawAction) => ns.PrintImage(w, h, drawAction);

}