XNA Graphics API Library 介绍

眼看着MonoGame就要"所有平台"(MonoTouch, MonoDroid, Mac OS X, Windows & Linux)通吃了,这倍增了我对XNA的兴趣，为了打下一个良好的基础，就从最基本的绘图函数开始吧。

这个XNA Graphics API Library基于XNA的类库，实现了最基本最常用的绘图类库，如：画线，画矩形，画圆等。

特点：

1. API十分简单。

2. 性能非常好。

3. 支持多线程。

代码示例：

1. DrawingBatch

            drawingBatch = new DrawingBatch(GraphicsDevice);

            drawingBatch.Begin();
            drawingBatch.DrawLine(10, 20, 100, 20, Color.Red);
            drawingBatch.DrawRectangle(120, 10, 100, 20, Color.Blue);
            drawingBatch.DrawTriangle(240, 10, 240, 60, 200, 60, Color.Black);
            drawingBatch.DrawEllipse(310, 10, 50, 50, Color.Green);
            drawingBatch.DrawPolyline(new Vector2[] { new Vector2(410, 10), new Vector2(440, 10), new Vector2(420, 20), new Vector2(440, 40), new Vector2(410, 60) }, Color.Aqua);
            drawingBatch.DrawFilledRectangle(120, 110, 50, 0, Color.Blue);
            drawingBatch.DrawFilledTriangle(240, 110, 240, 160, 200, 160, Color.Brown);
            drawingBatch.DrawFilledEllipse(310, 110, 80, 40, Color.Green);
            drawingBatch.End();

2.  DrawingContext (基于 DrawingBatch 并且包装了SpriteBatch的所有方法)

            drawingContext = new DrawingContext(GraphicsDevice);
            spriteFont = Content.Load<SpriteFont>("SegoeUI");
            texture = Content.Load<Texture2D>("Tulips");

            drawingContext.Begin();
            drawingContext.DrawLine(10, 20, 100, 20, Color.Red);
            drawingContext.DrawRectangle(120, 10, 100, 20, Color.Blue);
            drawingContext.DrawTriangle(240, 10, 240, 60, 200, 60, Color.Black);
            drawingContext.DrawEllipse(310, 10, 50, 50, Color.Green);
            drawingContext.DrawTexture(texture, new Vector2(10, 300), Color.White);
            drawingContext.DrawPolyline(new Vector2[] { new Vector2(410, 10), new Vector2(440, 10), new Vector2(420, 20), new Vector2(440, 40), new Vector2(410, 60) }, Color.Aqua);
            drawingContext.DrawFilledRectangle(120, 110, 50, 50, Color.Blue);
            drawingContext.DrawFilledTriangle(240, 110, 240, 160, 200, 160, Color.Brown);
            drawingContext.DrawFilledEllipse(310, 110, 80, 40, Color.Green);
            drawingContext.DrawText(spriteFont, "Hello World!", new Vector2(120, 300), Color.Black);
            drawingContext.End();

3. DrawingTexture (可以在贴图上先绘制图形，然后再将贴图输出)

            spriteFont = Content.Load<SpriteFont>("SegoeUI");
            texture = Content.Load<Texture2D>("Tulips");

            PresentationParameters pp = GraphicsDevice.PresentationParameters;
            int bufferWidth = pp.BackBufferWidth;
            int bufferHeight = pp.BackBufferHeight;
            drawingTexture = new DrawingTexture(GraphicsDevice, bufferWidth, bufferHeight);
            drawingTexture.Clear(Color.White);

            DrawingContext drawingContext = drawingTexture.DrawingContext;            
            drawingContext.Begin();            
            drawingContext.DrawLine(10, 20, 100, 20, Color.Red);
            drawingContext.DrawRectangle(120, 10, 100, 20, Color.Blue);
            drawingContext.DrawTriangle(240, 10, 240, 60, 200, 60, Color.Black);
            drawingContext.DrawEllipse(310, 10, 50, 50, Color.Green);
            drawingContext.DrawTexture(texture, new Vector2(10, 300), Color.White);
            drawingContext.DrawPolyline(new Vector2[] { new Vector2(410, 10), new Vector2(440, 10), new Vector2(420, 20), new Vector2(440, 40), new Vector2(410, 60) }, Color.Aqua);
            drawingContext.DrawFilledRectangle(120, 110, 50, 50, Color.Blue);
            drawingContext.DrawFilledTriangle(240, 110, 240, 160, 200, 160, Color.Brown);
            drawingContext.DrawFilledEllipse(310, 110, 80, 40, Color.Green);
            drawingContext.DrawText(spriteFont, "Hello World!", new Vector2(120, 300), Color.Black);
            drawingContext.End();

            spriteBatch.Begin();
            spriteBatch.Draw(drawingTexture, Vector2.Zero, Color.White);
            spriteBatch.End();

4. DrawingComponent

            drawingComponent = new DrawingComponent(this);
            this.Components.Add(this.drawingComponent);

            drawingComponent.DrawingContext.DrawLine(0, 0, 100, 100, Color.Black);

示例程序截屏：

下载地址：

可执行示例程序: bin.zip

全部源码: xnagraphics.zip

谢谢支持！！！