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using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using ShiftOS.Frontend.Apps;
namespace ShiftOS.Frontend.GraphicsSubsystem
{
public class GraphicsContext
{
public GraphicsDevice Device
{
get
{
return _graphicsDevice;
}
}
private int _startx = 0;
private int _starty = 0;
private int _maxwidth = 1;
private int _maxheight = 1;
public int X
{
get
{
return _startx;
}
set
{
_startx = value;
}
}
public int Y
{
get
{
return _starty;
}
set
{
_starty = value;
}
}
public int Width
{
get
{
return _maxwidth;
}
set
{
_maxwidth = value;
}
}
public int Height
{
get
{
return _maxheight;
}
set
{
_maxheight = value;
}
}
private GraphicsDevice _graphicsDevice;
private SpriteBatch _spritebatch;
public GraphicsContext(GraphicsDevice device, SpriteBatch batch, int x, int y, int width, int height)
{
_graphicsDevice = device;
_spritebatch = batch;
_maxwidth = width;
_maxheight = height;
_startx = x;
_starty = y;
}
public void Clear(Color c)
{
DrawRectangle(0, 0, _maxwidth, _maxheight, c);
}
public void DrawLine(int x, int y, int x1, int y1, int thickness, Texture2D tex2)
{
DrawLine(x, y, x1, y1, thickness, tex2, Color.White);
}
public void DrawLine(int x, int y, int x1, int y1, int thickness, Texture2D tex2, Color tint)
{
x += _startx;
y += _starty;
int distance = (int)Vector2.Distance(new Vector2(x, y), new Vector2(x1, y1));
float rotation = getRotation(x, y, x1, y1);
_spritebatch.Draw(tex2, new Rectangle(x, y, distance, thickness), null, tint, rotation, Vector2.Zero, SpriteEffects.None, 0);
}
public void DrawLine(int x, int y, int x1, int y1, int thickness, Color color)
{
x += _startx;
y += _starty;
int distance = (int)Vector2.Distance(new Vector2(x, y), new Vector2(x1, y1));
float rotation = getRotation(x, y, x1, y1);
_spritebatch.Draw(UIManager.SkinTextures["PureWhite"], new Rectangle(x, y, distance, thickness), null, color, rotation, Vector2.Zero, SpriteEffects.None, 0);
}
public void DrawRectangle(int x, int y, int width, int height, Color color)
{
x += _startx;
y += _starty;
_spritebatch.Draw(UIManager.SkinTextures["PureWhite"], new Rectangle(x, y, width, height), color);
}
public void DrawRectangle(int x, int y, int width, int height, Texture2D tex2)
{
DrawRectangle(x, y, width, height, tex2, Color.White);
}
public void DrawRectangle(int x, int y, int width, int height, Texture2D tex2, Color tint)
{
x += _startx;
y += _starty;
_spritebatch.Draw(tex2, new Rectangle(x, y, width, height), tint);
}
public static Vector2 MeasureString(string text, System.Drawing.Font font, int wrapWidth = int.MaxValue)
{
var measure = TextRenderer.MeasureText(text, font, new System.Drawing.Size(wrapWidth, int.MaxValue));
return new Vector2(measure.Width, measure.Height);
}
public static List<TextCache> StringCaches = new List<TextCache>();
public TextCache GetCache(string text, System.Drawing.Font font, int wrapWidth)
{
//Don't use LINQ, it could be a performance bottleneck.
var caches = StringCaches.ToArray();
for (int i = 0; i < caches.Length; i++)
{
var cache = caches[i];
if (cache.Text == text && cache.FontFamily == font && cache.WrapWidth == wrapWidth)
return cache;
}
return null;
}
public void DrawString(string text, int x, int y, Color color, System.Drawing.Font font, int wrapWidth = 0)
{
if (string.IsNullOrEmpty(text))
return;
x += _startx;
y += _starty;
var measure = MeasureString(text, font, wrapWidth);
var cache = GetCache(text, font, wrapWidth);
if (cache == null)
{
using (var bmp = new System.Drawing.Bitmap((int)measure.X, (int)measure.Y))
{
using (var gfx = System.Drawing.Graphics.FromImage(bmp))
{
TextRenderer.DrawText(gfx, text, font, new System.Drawing.Rectangle(0,0,bmp.Width,bmp.Height), System.Drawing.Color.White);
}
var lck = bmp.LockBits(new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
var bytes = new byte[Math.Abs(lck.Stride) * lck.Height];
Marshal.Copy(lck.Scan0, bytes, 0, bytes.Length);
bmp.UnlockBits(lck);
var tex2 = new Texture2D(_graphicsDevice, bmp.Width, bmp.Height);
tex2.SetData<byte>(bytes);
cache = new TextCache
{
Cache = tex2,
Text = text,
FontFamily = font,
WrapWidth = wrapWidth
};
StringCaches.Add(cache);
}
}
_spritebatch.Draw(cache.Cache, new Rectangle(x, y, cache.Cache.Width, cache.Cache.Height), color);
}
private float getRotation(float x, float y, float x2, float y2)
{
float adj = x - x2;
float opp = y - y2;
float tan = opp / adj;
float res = MathHelper.ToDegrees((float)Math.Atan2(opp, adj));
res = (res - 180) % 360;
if (res < 0) { res += 360; }
res = MathHelper.ToRadians(res);
return res;
}
}
public class TextCache
{
public string Text { get; set; }
public System.Drawing.Font FontFamily { get; set; }
public Texture2D Cache { get; set; }
public int WrapWidth { get; set; }
}
}
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