ClassiCube/ClassicalSharp/2D/Drawing/GdiPlusDrawer2D.cs

// ClassicalSharp copyright 2014-2016 UnknownShadow200 | Licensed under MIT
#if !ANDROID
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;

namespace ClassicalSharp {

	public sealed partial class GdiPlusDrawer2D : IDrawer2D {

		Dictionary<int, SolidBrush> brushCache = new Dictionary<int, SolidBrush>(16);		
		Graphics g;
		Bitmap curBmp;
		
		public override void SetBitmap(Bitmap bmp) {
			if (g != null) {
				Utils.LogDebug("Previous IDrawer2D.SetBitmap() call was not properly disposed");
				g.Dispose();
			}
			
			g = Graphics.FromImage(bmp);
			g.TextRenderingHint = TextRenderingHint.AntiAlias;
			g.SmoothingMode = SmoothingMode.HighQuality;
			curBmp = bmp;
		}
		
		public override void DrawRect(FastColour colour, int x, int y, int width, int height) {
			Brush brush = GetOrCreateBrush(colour);
			g.FillRectangle(brush, x, y, width, height);
		}
		
		public override void DrawRectBounds(FastColour colour, float lineWidth, int x, int y, int width, int height) {
			using(Pen pen = new Pen(colour, lineWidth)) {
				pen.Alignment = PenAlignment.Inset;
				g.DrawRectangle(pen, x, y, width, height);
			}
		}
		
		public override void Clear(FastColour colour) {
			g.Clear(colour);
		}
		
		public override void Clear(FastColour colour, int x, int y, int width, int height) {
			g.SmoothingMode = SmoothingMode.None;
			Brush brush = GetOrCreateBrush(colour);
			g.FillRectangle(brush, x, y, width, height);
			g.SmoothingMode = SmoothingMode.HighQuality;
		}
		
		public override void Dispose() {
			g.Dispose();
			g = null;
		}

		public override Bitmap ConvertTo32Bpp(Bitmap src) {
			Bitmap bmp = new Bitmap(src.Width, src.Height);
			using(Graphics g = Graphics.FromImage(bmp)) {
				g.InterpolationMode = InterpolationMode.NearestNeighbor;
				g.DrawImage(src, 0, 0, src.Width, src.Height);
			}
			return bmp;
		}
		
		public override void DisposeInstance() {
			foreach (var pair in brushCache)
				pair.Value.Dispose();
			
			DisposeText();
			DisposeBitmappedText();
		}
		
		SolidBrush GetOrCreateBrush(FastColour col) {
			int key = col.ToArgb();
			SolidBrush brush;
			if (brushCache.TryGetValue(key, out brush))
				return brush;
			
			brush = new SolidBrush(col);
			brushCache[key] = brush;
			return brush;
		}
	}
}
#endif