Note that display.init() should be called during pygame.init() automatically. Also, quitting (uninitializing) the display will stop showing every Surface drawn on the display Surface. You can initialize, check initialization, and unitialize a display with the following commands:

```Python
pygame.display.init() 
pygame.display.get_init() #will return true since display is initialized
pygame.display.quit() 
```

Initialize/uninitialize a display in Pygame

You can create a display surface by using the set_mode method on pygame.display. It will take in five parameters: size, flags, depth, and vsync. The size is the width and height of the desired display. The flags param controls which type of dipslay you want. Depth dictates the number of bits to use for color, which should be left empty since pygame will automatically find the appropriate color depth to display. The display param Vsync allows you to enable vysnc on the game, but requires certain flags to be set and may not work depending on hardware specs of your machine. The set_mode command is shown below.
```Python
pygame.display.set_mode(size=(0, 0), flags=0, depth=0, vsync=0)
```

Create a Display Surface in Pygame

There are multiple functions for updating displays--display.flip() and display.update(). Flip will update the whole display, whereas update will update only a portion of the screen (either a rectangle or a list of a rectangles). These functions are demonstrated below.
```Python
pygame.display.flip() #updates entire display surface
pygame.display.update(rectangle) #updates a rectangular portion of display
pygame.display.update(rectangle_list) #updates a list of rectangular portions
```

Updating the Display in Pygame

Using the display module, you are able to:

- Initalize/uninitialize a display
- Create a display surface
- Update the display

University of Michigan - Ann Arbor

You can think of a Surface as a blank piece of paper. There are plenty of methods you can call to draw on the Surface using graphics manipulation. This means altering pixel color values and their alphas. In order to actually make a game, you will have to decide which Surface you want to be your screen by calling a method on the Display (which handles the main game screen). You can only have one Surface as your screen. Additionally, all images must be displayed on a Surface.

Surfaces in Pygame

Pygame Documentation

Display is a module to control the display window and screen. Using the set_mode method, you can create the Surface that will act as the screen of your game. All other Surfaces for sprites, text, etc. will be drawn on the Surface you created with display. You can have only one display Surface at a time. If you call set_mode again, the previous screen will be replaced with the new Surface generated.

Display in Pygame

Using the Display Module in Pygame

You can use pygame.Surface.blit() to draw one surface onto another at a given location. Blit() takes in a source Surface (what you're drawing from), a destination position (where on the surface you're drawing), an optional 
set of coordinates for the area of the Surface you're drawing from, and an optional set of flags to modify the result.
```Python
displaySurface = pygame.display.set_mode(1920, 1080)
image = pygame.image.load("cat.png")
displaySurface.blit(image, (100, 100)) #this will copy the image onto the displaySurface at the position (100, 100)
```

Using Surface.blit() in Pygame

The transform module contains various transform operations. These are operations that alter a surface's scale and rotation in some way. Some transforms are destructive in the sense that they result in pixels being lost, which means there are specific techniques required to continuously scale a surface up without losing too many pixels.

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