目录

收起
1.关于Python
2.Python编程环境搭建
3.变量类型和运算符
4.列表、元组、字典和集合
5.Python字符串常用方法
6.Python流程控制
7.函数和lambda表达式
8.Python类和对象
9.Python类特殊成员方法与属性操作全解析
10.Python异常处理机制
11.模块与包管理技术解析
12.文件系统操作与IO管理
13.Python高级编程核心技术深度解析
14.Python核心类型转换函数原理与应用
15.代码实例
16.常见问题及解决
17.知识点问答

pygame.Surface.convert() 的参数

### Pygame Surface `convert()` 方法详解 `pygame.Surface.convert()` 是用于转换表面像素格式的方法，这有助于提高性能并减少内存占用。此方法允许指定目标颜色深度和其他属性。 #### 参数说明 该函数接受可选参数： - **format (Surface)**: 如果提供了一个已存在的 `Surface` 对象作为参数，则新创建的 `Surface` 的色彩模式会尽可能匹配给定的 `Surface` 色彩模式[^2]。 - **flags**: 这是一个位掩码，用来设置特殊标志，比如透明度处理等特性。常用的是 `SRCALPHA`, 它表示源图有 alpha 通道(即支持半透明效果)[^4]。 当不带任何参数调用时，默认情况下它会使新的 `Surface` 和当前显示的 `Surface`(由 `set_mode()` 创建的那个)具有相同的色彩深度和其它属性，从而优化图像混合操作的速度[^4]。 #### 使用示例 下面是将一张图片加载进来，并将其转换成与显示器兼容的颜色格式的例子: ```python import pygame # 初始化Pygame库 pygame.init() screen = pygame.display.set_mode((800, 600)) # 加载外部图片文件为一个Surface对象 image_surface = pygame.image.load('example.png') # 将这个surface转换为目标显示surface相适应的形式 converted_image = image_surface.convert(screen) while True: screen.blit(converted_image, (0, 0)) pygame.display.flip() ``` 上述代码片段展示了如何利用 `.convert()` 来确保所使用的图形资源能够高效地呈现于屏幕上[^3]。

创作声明：本文部分内容由AI辅助生成（AIGC），仅供参考

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T ABLE OF C ONTENTS Who is this book for? ........................................................................................................................ i About This Book .............................................................................................................................. ii Chapter 1 – Installing Python and Pygame ...................................................................................... 1 What You Should Know Before You Begin ................................................................................ 1 Downloading and Installing Python ............................................................................................. 1 Windows Instructions .................................................................................................................. 1 Mac OS X Instructions ................................................................................................................. 2 Ubuntu and Linux Instructions .................................................................................................... 2 Starting Python............................................................................................................................. 2 Installing Pygame......................................................................................................................... 3 How to Use This Book ................................................................................................................. 4 The Featured Programs ................................................................................................................ 4 Downloading Graphics and Sound Files ...................................................................................... 4 Line Numbers and Spaces ............................................................................................................ 4 Text Wrapping in This Book ....................................................................................................... 5 Checking Your Code Online ........................................................................................................ 6 More Info Links on http://invpy.com ........................................................................................... 6 Chapter 2 – Pygame Basics .............................................................................................................. 7 GUI vs. CLI ................................................................................................................................. 7 Source Code for Hello World with Pygame ................................................................................ 7 Setting Up a Pygame Program ..................................................................................................... 8 Game Loops and Game States ................................................................................................... 10 pygame.event.Event Objects ........................................................................................... 11 The QUIT Event and pygame.quit() Function .................................................................. 12 Pixel Coordinates ....................................................................................................................... 13iv http://inventwithpython.com/pygame A Reminder About Functions, Methods, Constructor Functions, and Functions in Modules (and the Difference Between Them) .................................................................................................. 14 Surface Objects and The Window ............................................................................................. 15 Colors 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.................................................................................................................................. 24 Frames Per Second and pygame.time.Clock Objects ....................................................... 27 Drawing Images with pygame.image.load() and blit() ............................................ 28 Fonts ........................................................................................................................................... 28 Anti-Aliasing.............................................................................................................................. 30 Playing Sounds........................................................................................................................... 31 Summary .................................................................................................................................... 32 Chapter 3 – Memory Puzzle 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.......................................................................................... 44 Crash Early and Crash Often! .................................................................................................... 44 Making the Source Code Look Pretty ........................................................................................ 45 Using Constant Variables Instead of Strings ............................................................................. 46 Making Sure We Have Enough Icons ........................................................................................ 47 Tuples vs. Lists, Immutable vs. Mutable ................................................................................... 47 Email questions to the author: al@inventwithpython.comAbout This Book v One Item Tuples Need a Trailing Comma ................................................................................. 48 Converting Between Lists and Tuples 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Mismatched Pair of Icons ........................................................................................ 56 Handling If the Player Won ....................................................................................................... 56 Drawing the Game State to the Screen ...................................................................................... 57 Creating the ―Revealed Boxes‖ Data Structure ......................................................................... 58 Creating the Board Data Structure: Step 1 – Get All Possible Icons ......................................... 58 Step 2 – Shuffling and Truncating the List of All Icons ............................................................ 59 Step 3 – Placing the Icons on the Board .................................................................................... 59 Splitting a List into a List of Lists.............................................................................................. 60 Different Coordinate Systems .................................................................................................... 61 Converting from Pixel Coordinates to Box Coordinates ........................................................... 62 Drawing the Icon, and Syntactic Sugar ...................................................................................... 63 Syntactic Sugar with Getting a Board Space’s Icon’s Shape and Color .................................... 64 Drawing the Box Cover ............................................................................................................. 64 Handling the Revealing and Covering Animation ..................................................................... 65 Drawing the Entire Board .......................................................................................................... 66 Drawing the Highlight 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........................................................................................ 74 Chapter 4 – Slide Puzzle ................................................................................................................ 77 How to Play Slide Puzzle ........................................................................................................... 77 Source Code to Slide Puzzle ...................................................................................................... 77 Second Verse, Same as the First ................................................................................................ 85 Setting Up the Buttons ............................................................................................................... 86 Being Smart By Using Stupid Code .......................................................................................... 87 The Main Game Loop ................................................................................................................ 88 Clicking on the Buttons ............................................................................................................. 89 Sliding Tiles with the Mouse ..................................................................................................... 90 Sliding Tiles with the Keyboard ................................................................................................ 90 ―Equal To One Of‖ Trick with the in Operator ........................................................................ 91 WASD and Arrow Keys ............................................................................................................ 91 Actually Performing the Tile Slide ............................................................................................ 92 IDLE and Terminating Pygame Programs ................................................................................. 92 Checking for a Specific Event, and Posting Events to Pygame’s Event Queue ........................ 92 Creating the Board Data Structure ............................................................................................. 93 Not Tracking the Blank Position ................................................................................................ 94 Making a Move by Updating the Board Data Structure ............................................................ 94 When NOT to Use an Assertion ................................................................................................ 95 Getting a Not-So-Random Move ............................................................................................... 96 Converting Tile Coordinates to Pixel Coordinates .................................................................... 97 Converting from Pixel Coordinates to Board Coordinates ........................................................ 97 Drawing a Tile ........................................................................................................................... 97 The Making Text Appear on the Screen .................................................................................... 98 Drawing the Board ..................................................................................................................... 99 Drawing the Border of the Board ............................................................................................... 99 Email questions to the author: al@inventwithpython.comAbout This Book vii Drawing the Buttons ................................................................................................................ 100 Animating the Tile Slides ........................................................................................................ 100 The copy() Surface Method ................................................................................................. 101 Creating a New Puzzle ............................................................................................................. 103 Animating the Board Reset ...................................................................................................... 104 Time vs. Memory Tradeoffs .................................................................................................... 105 Nobody Cares About a Few Bytes ........................................................................................... 106 Nobody Cares About a Few Million Nanoseconds .................................................................. 107 Summary .................................................................................................................................. 107 Chapter 5 – Simulate 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........................................................................................................ 139 Collision Detection .................................................................................................................. 140 Detecting Collisions with the Apple ........................................................................................ 141 Moving the Worm .................................................................................................................... 142 The insert() List Method................................................................................................... 142 Drawing the Screen .................................................................................................................. 143 Drawing ―Press a key‖ Text to the Screen ............................................................................... 143 The checkForKeyPress() Function 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.................................................................................................................... 174 Using Movement Variables to Handle User Input ................................................................... 175 Checking if a Slide or Rotation is Valid .................................................................................. 175 Finding the Bottom .................................................................................................................. 178 Moving by Holding Down the Key.......................................................................................... 179 Letting the Piece ―Naturally‖ Fall ............................................................................................ 182 Drawing Everything on the Screen .......................................................................................... 182 makeTextObjs() , A Shortcut Function for Making Text .................................................. 183 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............................................... 190 Checking for, and Removing, Complete Lines ........................................................................ 192 Convert from Board Coordinates to Pixel Coordinates ........................................................... 195 Drawing a Box on the Board or Elsewhere on the Screen ....................................................... 195 Drawing Everything to the Screen ........................................................................................... 196x http://inventwithpython.com/pygame Drawing the Score and Level Text .......................................................................................... 196 Drawing a Piece on the Board or Elsewhere on the Screen ..................................................... 197 Drawing the ―Next‖ Piece ........................................................................................................ 197 Summary .................................................................................................................................. 198 Chapter 8 – Squirrel Eat Squirrel ................................................................................................. 200 How to Play Squirrel Eat Squirrel............................................................................................ 200 The Design of Squirrel Eat Squirrel ......................................................................................... 200 Source Code to Squirrel Eat Squirrel ....................................................................................... 201 The Usual Setup Code ............................................................................................................. 211 Describing the Data Structures ................................................................................................ 212 The main() Function 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Handling Loop ........................................................................................................ 226 Moving the Player, and Accounting for Bounce ...................................................................... 228 Collision Detection: Eat or Be Eaten ....................................................................................... 229 Email questions to the author: al@inventwithpython.comAbout This Book xi The Game Over Screen ............................................................................................................ 231 Winning ................................................................................................................................... 232 Drawing a Graphical Health Meter .......................................................................................... 232 The Same Old terminate() Function ................................................................................ 232 The Mathematics of the Sine Function .................................................................................... 233 Backwards Compatibility with Python Version 2 .................................................................... 236 The getRandomVelocity() Function .............................................................................. 237 Finding a Place to Add New Squirrels and Grass .................................................................... 237 Creating Enemy Squirrel Data Structures ................................................................................ 238 Flipping the Squirrel Image ..................................................................................................... 239 Creating Grass Data Structures ................................................................................................ 239 Checking if Outside the Active Area ....................................................................................... 240 Summary 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................................................................................................................. 280 Stack Overflows ....................................................................................................................... 281 Preventing Stack Overflows with a Base Case ........................................................................ 283xii http://inventwithpython.com/pygame The Flood Fill Algorithm ......................................................................................................... 284 Drawing the Map ..................................................................................................................... 285 Checking if the Level is Finished ............................................................................................ 287 Summary .................................................................................................................................. 288 Chapter 10 – Four Extra Games 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