Drawing Shapes

Primitives2d

https://bitbucket.org/C3/2d-xna-primitives/wiki/Home

Using Textures

Filled Rectangle

// Make a 1x1 texture named pixel.  
Texture2D pixel = new Texture2D(graphicsDeviceReferenceHere, 1, 1);  
 
// Create a 1D array of color data to fill the pixel texture with.  
Color[] colorData = {  
                        Color.White,   
                    };  
 
// Set the texture data with our color information.  
pixel.SetData<Color>(colorData);  
 
// Draw a fancy purple rectangle.  
spriteBatch.Draw(pixel, new Rectangle(0, 0, 300, 300), Color.Purple);

Outline Only

// In LoadContent() 
Texture2D pixel = new Texture2D(GraphicsDevice, 1, 1, false, SurfaceFormat.Color); 
pixel.SetData(new[] { Color.White }); // so that we can draw whatever color we want on top of it 

// In Draw() 
spriteBatch.Begin(); 
Rectangle titleSafeRectangle = GraphicsDevice.Viewport.TitleSafeArea; 
DrawBorder(titleSafeRectangle, 5, Color.Red); // can draw any rectangle here 
spriteBatch.End(); 

/// <summary> 
/// Will draw a border (hollow rectangle) of the given 'thicknessOfBorder' (in pixels) 
/// of the specified color. 
/// </summary> 
/// <param name="rectangleToDraw"></param> 
/// <param name="thicknessOfBorder"></param> 
private void DrawBorder(Rectangle rectangleToDraw, int thicknessOfBorder, Color borderColor) 
{ 
// Draw top line 
spriteBatch.Draw(_pixel, new Rectangle(rectangleToDraw.X, rectangleToDraw.Y, rectangleToDraw.Width, thicknessOfBorder), borderColor); 

// Draw left line 
spriteBatch.Draw(pixel, new Rectangle(rectangleToDraw.X, rectangleToDraw.Y, thicknessOfBorder, rectangleToDraw.Height), borderColor); 

// Draw right line 
spriteBatch.Draw(pixel, new Rectangle((rectangleToDraw.X + rectangleToDraw.Width - thicknessOfBorder), 
rectangleToDraw.Y, 
thicknessOfBorder, 
rectangleToDraw.Height), borderColor); 
// Draw bottom line 
spriteBatch.Draw(pixel, new Rectangle(rectangleToDraw.X, 
rectangleToDraw.Y + rectangleToDraw.Height - thicknessOfBorder, 
rectangleToDraw.Width, 
thicknessOfBorder), borderColor); 
}