69 lines
1.5 KiB
Python
69 lines
1.5 KiB
Python
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#!/usr/bin/env python3
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import os
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import sys
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import random
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import time
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# Groesse des Bildschirms bestimmen
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Nx = int(sys.argv[1])
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Ny = int(sys.argv[2])
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# Bestimme den Parameter
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time_ms = 100
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try:
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time_ms = int(sys.argv[3])
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except:
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pass
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# Puffer fuer Pixel erstellen und mit 0 initialisieren
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buffer = bytearray(b"\x00" * (4 * Nx * Ny))
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curPixel = 0
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while True:
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# Zufaellige Pixel waeheln
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# rot
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x_r = random.randint(0, Nx-1)
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y_r = random.randint(0, Ny-1)
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i_r = 4*(x_r+Nx*y_r)
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# gruen
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x_g = random.randint(0, Nx-1)
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y_g = random.randint(0, Ny-1)
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i_g = 4*(x_g+Nx*y_g)
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# blau
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x_b = random.randint(0, Nx-1)
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y_b = random.randint(0, Ny-1)
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i_b = 4*(x_b+Nx*y_b)
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# weiss
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x_w = random.randint(0, Nx-1)
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y_w = random.randint(0, Ny-1)
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i_w = 4*(x_w+Nx*y_w)
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# Pixel in Puffer schreiben
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# rot
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buffer[i_r+0] = 0xff # Rotanteil
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buffer[i_r+1] = 0x00 # Gruenanteil
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buffer[i_r+2] = 0x00 # Blauanteil
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buffer[i_r+3] = 0x00
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# gruen
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buffer[i_g+0] = 0x00 # Rotanteil
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buffer[i_g+1] = 0xff # Gruenanteil
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buffer[i_g+2] = 0x00 # Blauanteil
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buffer[i_g+3] = 0x00
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# blau
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buffer[i_b+0] = 0x00 # Rotanteil
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buffer[i_b+1] = 0x00 # Gruenanteil
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buffer[i_b+2] = 0xff # Blauanteil
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buffer[i_b+3] = 0x00
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# weiss
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buffer[i_w+0] = 0x00 # Rotanteil
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buffer[i_w+1] = 0x00 # Gruenanteil
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buffer[i_w+2] = 0x00 # Blauanteil
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buffer[i_w+3] = 0xff
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# Zeige den Puffer an
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os.write(1, buffer)
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# warte time_ms ms
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time.sleep(time_ms*0.001)
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