commit 50a1f5bd0af9cdee9ce1599c7662ae9a5376faf1
Author: Marcel Hellkamp <marc@gsites.de>
Date:   Thu May 10 21:37:57 2012 +0200

    Initial Commit

diff --git a/README.txt b/README.txt
new file mode 100644
index 0000000..ce3e138
--- /dev/null
+++ b/README.txt
@@ -0,0 +1,5 @@
+Install
+=======
+
+    sudo aptitude install python-gevent python-pygame
+    python pixelflut.py
diff --git a/pixelflut.py b/pixelflut.py
new file mode 100755
index 0000000..eafde29
--- /dev/null
+++ b/pixelflut.py
@@ -0,0 +1,161 @@
+#coding: utf8
+
+import time
+from gevent import spawn, sleep as gsleep
+from gevent.server import StreamServer
+from gevent.coros import Semaphore
+from gevent.queue import Queue
+from collections import deque
+
+
+class Client(object):
+    def __init__(self, canvas, socket, address):
+        self.canvas = canvas
+        self.socket = socket
+        self.address = address
+        self.connect_ts = time.time()
+        # This buffer discards all but the newest 1024 messages
+        self.sendbuffer = deque([], 1024)
+        self.limit = Semaphore(0)
+        self.counter = 0
+        print 'CONNECT', address
+
+    def send(self, line):
+        self.sendbuffer.append(line.strip() + '\n')
+
+    def disconnect(self):
+        print 'DISCONNECT', self.address
+        print self.counter / (time.time() - self.connect_ts)
+        self.socket.close()
+        del self.canvas.clients[self.address]
+
+    def serve(self):
+        sendall = self.socket.sendall
+        readline = self.socket.makefile().readline
+        try:
+            while True:
+                # Idea: Sand first, recieve later. If the client is to
+                # slow to get the sendbuffer empty, he cannot send.
+                while self.sendbuffer:
+                    sendall(self.sendbuffer.popleft())
+                line = readline()
+                if not line:
+                    break
+                arguments = line.split()
+                command = arguments.pop(0)
+                if command == 'PX':
+                    self.on_PX(arguments)
+                elif command == 'SIZE':
+                    self.on_SIZE(arguments)
+        finally:
+            self.disconnect()
+
+    def on_SIZE(self, args):
+        self.send('SIZE %d %d' % self.canvas.get_size())
+
+    def on_PX(self, args):
+        self.counter += 1
+        self.limit.acquire()
+        x,y,color = args
+        x,y = int(x), int(y)
+        c = int(color, 16)
+        if c <= 16777215:
+            r = (c & 0xff0000) >> 16
+            g = (c & 0x00ff00) >> 8
+            b =  c & 0x0000ff
+            a =      0xff
+        else:
+            r = (c & 0xff000000) >> 24
+            g = (c & 0x00ff0000) >> 16
+            b = (c & 0x0000ff00) >> 8
+            a =  c & 0x000000ff
+        self.canvas.set_pixel(x, y, r, g, b, a)
+
+    def tick(self):
+        while self.limit.counter <= 10:
+            self.limit.release()
+
+
+
+
+
+import pygame
+import cairo
+import math
+import random
+import array
+
+class Canvas(object):
+    size  = 200,300
+    flags = pygame.RESIZABLE#|pygame.FULLSCREEN
+
+    def __init__(self):
+        pygame.init()
+        pygame.mixer.quit()
+        pygame.display.set_caption('PIXELSTORM')
+        self.screen = pygame.display.set_mode(self.size, self.flags)
+        self.ticks = 0
+        self.width  = self.screen.get_width()
+        self.height = self.screen.get_height()
+        self.clients = {}
+
+    def serve(self, host, port):
+        self.server = StreamServer((host, port), self.make_client)
+        self.server.start()
+        return spawn(self._loop)
+
+    def make_client(self, socket, address):
+        if address in self.clients:
+            self.clients[address].disconnect()
+        self.clients[address] = client = Client(self, socket, address)
+        client.serve() # This blocks until ready
+
+    def _loop(self):
+        while True:
+            gsleep(0) # Required to allow other tasks to run
+            for e in pygame.event.get():
+                if e.type == pygame.VIDEORESIZE:
+                    self.on_resize(e.size)
+                if e.type == pygame.KEYDOWN and e.unicode == 'q':
+                    return
+                if e.type == pygame.QUIT:
+                    return
+            self.ticks += 1
+            if 0 and self.ticks % 1000 == 0:
+                pygame.image.save(self.screen,
+                'hist%000000d.png' % (self.ticks/1000))
+            pygame.display.flip()
+            for client in self.clients.itervalues():
+                client.tick()
+
+    def on_resize(self, size):
+        old = self.screen.copy()
+        self.screen = pygame.display.set_mode(size, self.flags)
+        self.screen.blit(old, (0,0))
+        self.width  = self.screen.get_width()
+        self.height = self.screen.get_height()
+
+    def get_size(self):
+        return self.width, self.height
+
+    def get_pixel(self, x, y):
+        return self.screen.get_at((x,y))
+
+    def set_pixel(self, x, y, r, g, b, a=255):
+        if a == 0: return
+        if a == 0xff:
+            self.screen.set_at((x,y), (r,g,b))
+        else:
+            r2,g2,b2,a2 = self.screen.get_at((x, y))
+            r = (r2*(0xff-a)+(r*a)) / 0xff
+            g = (g2*(0xff-a)+(g*a)) / 0xff
+            b = (b2*(0xff-a)+(b*a)) / 0xff
+            self.screen.set_at((x, y), (r,g,b))
+
+    
+
+
+
+if __name__ == '__main__':
+    canvas = Canvas()
+    canvas.serve('', 2342).join()