为什么切换窗口时出错？

Question

我试着用pygame用python构建一个简单的游戏。一开始，我的问题是使移动更加平稳，因为矩形的移动几乎每秒钟都会停滞几毫秒。然后我找到了一个解决办法操作系统环境['SDL\u VIDEODRIVER']='directx'”进入“我的代码”，并将显示模式更改为“全屏”和“双缓冲”。现在的移动更加流畅，但每当我在全屏游戏中使用Alt+Tab时，就会出现以下错误：

  Traceback (most recent call last):
  File "C:\Users\L-Tramp-GAMING\Documents\Python\Game\Main_Game.py", line 64, in <module>
    screen.fill(BG_COLOR)
pygame.error: IDirectDrawSurface3::Blt: Surface was lost

我不知道如何绕过这个问题。我也在想，我是否可以运行在窗口模式下的directx线在正常速度增加游戏。目前，在窗口模式下，游戏的运行速度要快得多。我希望你们能帮我。谢谢你，保罗

import pygame
import random
import os

#Variables

WIDTH = 1280
HEIGHT = 720

GAME_OVER = False

BG_COLOR = (0, 0, 20)

playerWidth = 50
playerHeight = 50
playerPosX = WIDTH / 2 - playerWidth / 2
playerPosY = HEIGHT - (playerHeight + 75)
playerSpeed = 10

enemieWidth = 75
enemieHeight = 75
enemiePosX = random.randint(0, WIDTH - enemieWidth)
enemiePosY = 0
enemieSpeed = 5

enemieCounter = 1


####################################################################################################

os.environ['SDL_VIDEODRIVER'] = 'directx'

pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT), pygame.FULLSCREEN | pygame.DOUBLEBUF)
pygame.display.set_caption("Game")
pygame.key.set_repeat(1, 10)
clock = pygame.time.Clock()

#GameLoop

while not GAME_OVER:

    for e in pygame.event.get():

        if e.type == pygame.QUIT:

            GAME_OVER = True

        if e.type == pygame.KEYDOWN:

            if e.key == pygame.K_a:

                playerPosX -= playerSpeed
                print(hex(screen.get_flags() & 0xFFFFFFFF))

            if e.key == pygame.K_d:

                playerPosX += playerSpeed

    #Graphics

    screen.fill(BG_COLOR)

    player = pygame.draw.rect(screen, (0, 255, 0), (playerPosX, playerPosY, playerWidth, playerHeight))

    if enemiePosY < HEIGHT:

        enemie = pygame.draw.rect(screen, (255, 0, 0), (enemiePosX, enemiePosY, enemieWidth, enemieHeight))
        enemiePosY += enemieSpeed

    else:

        enemieCounter += 1
        enemiePosY = 0
        enemiePosX = random.randint(0, WIDTH - enemieWidth)

        if (enemieCounter + 1) % 2 == 0:

            pass

    #End Graphics

    pygame.display.flip()

Answer 1

代码是否可以处理错误，然后尝试重新创建screen对象？
这与从全屏切换到窗口的过程是相同的。你知道吗

编辑：从pygamewiki:https://www.pygame.org/wiki/toggle_fullscreen添加了一些代码，希望能够解决OP评论中的进一步问题。你知道吗

try:
    screen.fill(BG_COLOR)
except pygame.error as e:
    # Get the size of the screen
    screen_info= pygame.display.Info()
    cursor     = pygame.mouse.get_cursor()  # Duoas 16-04-2007
    new_width  = screen_info.current_w
    new_height = screen_info.current_h
    # re-initialise the display, creating a re-sizable window
    pygame.display.quit()
    pygame.display.init()
    screen = pygame.display.set_mode( ( new_width, new_height ), pygame.HWSURFACE|pygame.DOUBLEBUF|pygame.RESIZABLE )
    pygame.key.set_mods( 0 )            # HACK: work-a-round for a SDL bug??
    pygame.mouse.set_cursor( *cursor )  # Duoas 16-04-2007

    # did it work?
    screen.fill(BG_COLOR)

Answer 2

你的行动迟缓是由pygame.key.set\u重复. 为了让玩家按住a和d移动，你可以更新玩家在游戏循环中的位置，而不是通过跟踪速度变量来使用set\ U repeat。如果你想用操作系统环境另一个原因除了修复滞后，然后这将不起作用，但否则这应该是好的。你知道吗

import pygame
import random
import os

#Variables

WIDTH = 1280
HEIGHT = 720

GAME_OVER = False

BG_COLOR = (0, 0, 20)

playerWidth = 50
playerHeight = 50
playerPosX = WIDTH / 2 - playerWidth / 2
playerPosY = HEIGHT - (playerHeight + 75)
playerSpeed = 10

enemieWidth = 75
enemieHeight = 75
enemiePosX = random.randint(0, WIDTH - enemieWidth)
enemiePosY = 0
enemieSpeed = 5

enemieCounter = 1


####################################################################################################

#os.environ['SDL_VIDEODRIVER'] = 'directx'

pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Game")
#pygame.key.set_repeat(1, 10) <  - This line is the problem
clock = pygame.time.Clock()

#GameLoop

speed = 0

while not GAME_OVER:

    for e in pygame.event.get():

        if e.type == pygame.QUIT:

            GAME_OVER = True

        if e.type == pygame.KEYDOWN:

            if e.key == pygame.K_a:

                speed = -playerSpeed

            if e.key == pygame.K_d:

                speed = +playerSpeed

    playerPosX += speed

    #Graphics

    screen.fill(BG_COLOR)

    player = pygame.draw.rect(screen, (0, 255, 0), (playerPosX, playerPosY, playerWidth, playerHeight))

    if enemiePosY < HEIGHT:

        enemie = pygame.draw.rect(screen, (255, 0, 0), (enemiePosX, enemiePosY, enemieWidth, enemieHeight))
        enemiePosY += enemieSpeed

    else:

        enemieCounter += 1
        enemiePosY = 0
        enemiePosX = random.randint(0, WIDTH - enemieWidth)

        if (enemieCounter + 1) % 2 == 0:

            pass

    #End Graphics

    pygame.display.flip()