init

.venv/lib/python3.8/site-packages/pygame/examples/prevent_display_stretching.py

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+#!/usr/bin/env python
+""" pygame.examples.prevent_display_stretching
+
+Prevent display stretching on Windows.
+
+On some computers, the display environment can be configured to stretch
+all windows so that they will not appear too small on the screen for
+the user. This configuration is especially common on high-DPI displays.
+pygame graphics appear distorted when automatically stretched by the
+display environment. This script demonstrates a technique for preventing
+this stretching and distortion.
+
+Limitations:
+This script makes an API call that is only available on Windows (versions
+Vista and newer).
+
+"""
+
+# Ensure that the computer is running Windows Vista or newer
+import os
+import sys
+
+# game constants
+TEXTCOLOR = "green"
+BACKGROUNDCOLOR = "black"
+AXISCOLOR = "white"
+
+if os.name != "nt" or sys.getwindowsversion()[0] < 6:
+    raise NotImplementedError("this script requires Windows Vista or newer")
+
+import pygame as pg
+
+import ctypes
+
+# Determine whether or not the user would like to prevent stretching
+if os.path.basename(sys.executable) == "pythonw.exe":
+    selection = "y"
+else:
+    selection = None
+    while selection not in ("y", "n"):
+        selection = input("Prevent stretching? (y/n): ").strip().lower()
+
+if selection == "y":
+    msg = "Stretching is prevented."
+else:
+    msg = "Stretching is not prevented."
+
+# Prevent stretching
+if selection == "y":
+    user32 = ctypes.windll.user32
+    user32.SetProcessDPIAware()
+
+# Show screen
+pg.display.init()
+RESOLUTION = (350, 350)
+screen = pg.display.set_mode(RESOLUTION)
+
+# Render message onto a surface
+pg.font.init()
+font = pg.font.Font(None, 36)
+msg_surf = font.render(msg, 1, TEXTCOLOR)
+res_surf = font.render("Intended resolution: %ix%i" % RESOLUTION, 1, TEXTCOLOR)
+
+# Control loop
+running = True
+clock = pg.time.Clock()
+counter = 0
+while running:
+
+    for event in pg.event.get():
+        if event.type == pg.QUIT:
+            running = False
+
+    screen.fill(BACKGROUNDCOLOR)
+
+    # Draw lines which will be blurry if the window is stretched
+    # or clear if the window is not stretched.
+    pg.draw.line(screen, AXISCOLOR, (0, counter), (RESOLUTION[0] - 1, counter))
+    pg.draw.line(screen, AXISCOLOR, (counter, 0), (counter, RESOLUTION[1] - 1))
+
+    # Blit message onto screen surface
+    msg_blit_rect = screen.blit(msg_surf, (0, 0))
+    screen.blit(res_surf, (0, msg_blit_rect.bottom))
+
+    clock.tick(10)
+
+    pg.display.flip()
+
+    counter += 1
+    if counter == RESOLUTION[0]:
+        counter = 0
+
+pg.quit()