90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
# coding: ascii
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"""Prevent display stretching
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On some computers, the display environment can be configured to stretch
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all windows so that they will not appear too small on the screen for
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the user. This configuration is especially common on high-DPI displays.
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pygame graphics appear distorted when automatically stretched by the
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display environment. This script demonstrates a technique for preventing
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this stretching and distortion.
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Limitations:
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This script makes an API call that is only available on Windows (versions
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Vista and newer). ctypes must be installed.
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"""
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# Ensure that the computer is running Windows Vista or newer
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import os, sys
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if os.name != "nt" or sys.getwindowsversion()[0] < 6:
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raise NotImplementedError('this script requires Windows Vista or newer')
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# Ensure that ctypes is installed. It is included with Python 2.5 and newer,
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# but Python 2.4 users must install ctypes manually.
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try:
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import ctypes
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except ImportError:
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print('install ctypes from http://sourceforge.net/projects/ctypes/files/ctypes')
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raise
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import pygame
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# Determine whether or not the user would like to prevent stretching
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if os.path.basename(sys.executable) == 'pythonw.exe':
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selection = 'y'
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else:
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from pygame.compat import raw_input_
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selection = None
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while selection not in ('y', 'n'):
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selection = raw_input_('Prevent stretching? (y/n): ').strip().lower()
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if selection == 'y':
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msg = 'Stretching is prevented.'
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else:
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msg = 'Stretching is not prevented.'
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# Prevent stretching
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if selection == 'y':
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user32 = ctypes.windll.user32
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user32.SetProcessDPIAware()
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# Show screen
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pygame.display.init()
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RESOLUTION = (350, 350)
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screen = pygame.display.set_mode(RESOLUTION)
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# Render message onto a surface
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pygame.font.init()
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font = pygame.font.Font(None, 36)
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msg_surf = font.render(msg, 1, pygame.Color('green'))
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res_surf = font.render('Intended resolution: %ix%i' % RESOLUTION, 1, pygame.Color('green'))
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# Control loop
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running = True
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clock = pygame.time.Clock()
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counter = 0
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while running:
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for event in pygame.event.get():
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if event.type == pygame.QUIT:
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running = False
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screen.fill(pygame.Color('black'))
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# Draw lines which will be blurry if the window is stretched
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# or clear if the window is not stretched.
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pygame.draw.line(screen, pygame.Color('white'), (0, counter), (RESOLUTION[0] - 1, counter))
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pygame.draw.line(screen, pygame.Color('white'), (counter, 0), (counter, RESOLUTION[1] - 1))
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# Blit message onto screen surface
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msg_blit_rect = screen.blit(msg_surf, (0, 0))
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screen.blit(res_surf, (0, msg_blit_rect.bottom))
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clock.tick(10)
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pygame.display.flip()
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counter += 1
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if counter == RESOLUTION[0]:
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counter = 0
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