using D2D = Microsoft.WindowsAPICodePack.DirectX.Direct2D1;
using System;
using Microsoft.WindowsAPICodePack.DirectX.Graphics;

namespace Example
{
    internal sealed class MyScene : Direct2D.Scene
    {
        private D2D.SolidColorBrush redBrush;
        D2D.D2DBitmap m_atlasBitmap;
        int m_tileSize = 32;

        protected override void OnCreateResources()
        {
            this.redBrush = this.RenderTarget.CreateSolidColorBrush(new D2D.ColorF(1, 0, 0));

            m_atlasBitmap = this.RenderTarget.CreateBitmap(new D2D.SizeU((uint)m_tileSize, (uint)m_tileSize),
                new D2D.BitmapProperties(new D2D.PixelFormat(Format.B8G8R8A8UNorm, D2D.AlphaMode.Ignore), 96, 96));
        }

        protected override void OnFreeResources()
        {
            if (this.redBrush != null)
            {
                this.redBrush.Dispose();
                this.redBrush = null;
            }

            if (m_atlasBitmap != null)
            {
                m_atlasBitmap.Dispose();
                m_atlasBitmap = null;
            }
        }

        protected override void OnRender()
        {
            this.RenderTarget.BeginDraw();

            // clear to green
            this.RenderTarget.Clear(new D2D.ColorF(0, 1, 0, 1));

            int columns = (int)Math.Ceiling(this.RenderTarget.Size.Width / m_tileSize);
            int rows = (int)Math.Ceiling(this.RenderTarget.Size.Height / m_tileSize);

            for (int y = 0; y < rows; y++)
            {
                for (int x = 0; x < columns; x++)
                {
                    var rect = new D2D.RectF(x * m_tileSize, y * m_tileSize, x * m_tileSize + m_tileSize, y * m_tileSize + m_tileSize);
                    // draw red tile
                    this.RenderTarget.FillRectangle(rect, redBrush);
                    // draw black bitmap tile
                    this.RenderTarget.DrawBitmap(m_atlasBitmap, 1.0f, D2D.BitmapInterpolationMode.Linear, rect,
                        new D2D.RectF(0, 0, m_tileSize, m_tileSize));
                }
            }

            this.RenderTarget.EndDraw();
        }
    }
}