pygame 中的全屏模式是全黑的 [英] The fullscreen mode in pygame is entirely black

问题描述

我对 pygame 的全屏选项有一些问题.下面是一些简单地绘制一个蓝色窗口的代码，通过按 R 我们可以在蓝色和紫色之间切换.然后我们还可以使用 F 或 G 在全屏和窗口模式之间切换.F 是明确实现的，G 使用方法 toggle_fullscreen().

I have some issues with the fullscreen option of pygame. Here is some code that simply draws a blue window and by pressing R we can switch between blue and purple. Then we can also toggle between fullscreen and windowed mode using F or G. F is implemented explicitly and G uses the method toggle_fullscreen().

import pygame, sys
from pygame.locals import *

#Initializes pygame
pygame.init()

#Defines the Clock object
clock = pygame.time.Clock()

#Just draws a blue screen
size = (960, 540)
blue = (0,0,100)
purp = (100,0,100)
is_blue = True
display_surf = pygame.display.set_mode(size, RESIZABLE)
display_surf.fill(blue)

mainLoop = True
is_fullscreen = False

#Mainloop
while mainLoop:

    dt = clock.tick(12)

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            mainLoop = False
        if event.type == pygame.KEYDOWN:
            #Single key pressed
            if event.key == K_f:
                #Toggles fullscreen
                is_fullscreen = not is_fullscreen
                old_surface = display_surf
                setmode = FULLSCREEN if is_fullscreen else RESIZABLE
                display_surf = pygame.display.set_mode(size, setmode)
                display_surf.blit(old_surface, (0,0))
                del old_surface
            if event.key == K_q:
                #Quits the app
                mainLoop = False
            if event.key == K_r:
                #Redraws the blue or purple
                print("Trying to flip colors")
                display_surf.fill(purp if is_blue else blue)
                is_blue = not is_blue
            if event.key == K_g:
                #Toggles fullscreen with the dedicated method
                is_fullscreen = not is_fullscreen
                pygame.display.toggle_fullscreen()

    pygame.display.update()

pygame.quit()

我在 Ubuntu 18.04 上使用 Python 3.6.8.以下是我的观察:

I am on Ubuntu 18.04 using Python 3.6.8. Here are my observations:

1. 使用 pygame 2.0.0.dev6，当使用 F 或 G 全屏显示时，屏幕会执行以下操作:

1. Using pygame 2.0.0.dev6, when going fullscreen with either F or G the screen does the following:

1. 闪烁几次
2. 作为最小化图标进入任务栏
3. 如果我点击图标，屏幕会再闪烁几次，最后我们全屏了
4. 问题:屏幕全黑，按钮R不翻转颜色(但打印消息)

1. flashes a few times
2. goes in the task bar as a minimized icon
3. if I click on the icon the screen flashes a few more times and finally we are fullscreen
4. problem: the screen is entirely black and the button R does not flip the colors (but prints the message)

仍在使用 pygame 2.0.0.dev6.在这种情况下，G 和 F 按钮的行为不同:当使用 G 从全屏返回窗口时，R 按钮不会翻转颜色，即使在窗口版本中也是如此.当使用 F 代替它时.

在 pygame 2.0.0.dev3 版本中，G 按钮根本不起作用，而 F 具有与以前相同的行为.

Still using pygame 2.0.0.dev6. In this case the G and the F button behave differently: when going back from fullscreen to windowed with G, the R button doesn't flip the colors, even in the windowed version. When using F instead it works.

With pygame version 2.0.0.dev3 the G button does not work at all, while F has the same behavior as before.

我的主要问题是 1.4.:全屏模式是全黑的.

My major problem is 1.4.: the fullscreen mode is entirely black.

现在让我们做一个修改.更改 F 按钮

Now let's do a modification. Change the following line in the code for the F button

setmode = FULLSCREEN|SCALED if is_fullscreen else RESIZABLE    #FULLSCREEN -> FULLSCREEN|SCALED

这会以当前的屏幕分辨率全屏显示，而不是我在顶部指定的分辨率.现在是问题 1.1.、1.2 和 1.3.消失了:应用程序立即进入全屏模式.但问题 1.4.持续存在，而且程序不再接受输入.如果我按 Q 它不会退出.它不需要 Alt+Tab 或 Alt+F4，所以我必须重新启动计算机.

This goes fullscreen with the current screen resolution and not the one I specify at the top. Now the problems 1.1., 1.2 and 1.3. are gone: the app goes to fullscreen immediately. But the problem 1.4. persists and furthermore the program does not accept inputs anymore. If I press Q it won't quit. It doesn't take Alt+Tab or Alt+F4 and so I have to restart the computer.

推荐答案

pygame.display.set_mode 创建一个 pygame.Surface 对象，与窗口相关联.当 pygame.display.set_mode() 再次被调用时，之前与表面关联的对象将失效.

pygame.display.set_mode creates a pygame.Surface object, which is associated to the window. When pygame.display.set_mode() is called a again, then the object which was associated to the surface before gets invalide.

你必须copy()旧"表面:

You've to copy() the "old" surface:

is_fullscreen = not is_fullscreen

old_surface = display_surf.copy()

setmode = FULLSCREEN if is_fullscreen else RESIZABLE
display_surf = pygame.display.set_mode(size, setmode)
display_surf.blit(old_surface, (0,0))

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