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POcopying screen contents
 

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    <p>i need a certain area of the screen to be drawn in my app...although my code works fine, its very very slow...takes more than 20 seconds with inferior quality and around 30-40 with best quality... is there a quicker way of doing the same...i want it to b e done within .5 seconds max ...</p> <p>by taking ba screenshot ... i can do it in 5 seconds...but i need it within 0.5 seconds...</p> <p>xlib is not a necessity for me...it'll be great if you could suggest something beter and quicker !</p> <pre><code>class Window: def __init__(self, display, msg): self.display = display self.msg = msg self.screen = self.display.screen() self.window = self.screen.root.create_window( 10, 10, 300, 300, 1, self.screen.root_depth, background_pixel=self.screen.white_pixel, event_mask=X.ExposureMask | X.KeyPressMask, ) self.colormap = self.screen.default_colormap color = self.colormap.alloc_color(0, 0, 65535) xor_color = color.pixel ^ 0xffffff self.gc = self.window.create_gc( line_width = 2, line_style = X.LineSolid, fill_style = X.FillOpaqueStippled, fill_rule = X.WindingRule, cap_style = X.CapButt, join_style = X.JoinMiter, foreground = xor_color, background = self.screen.black_pixel, function = X.GXxor, graphics_exposures = False, subwindow_mode = X.IncludeInferiors, ) self.window.map() def loop(self): while True: e = self.display.next_event() if e.type == X.Expose: i=10 j=10 h=10 k=10 skip=0 while j&lt;121: while i&lt;121: if skip==0: o_x_image=self.screen.root.get_image(i, j, 1, 1, Xlib.X.ZPixmap, 0xffffffff) o_pil_image_rgb = PIL.Image.fromstring("RGB", (1, 1), o_x_image.data, "raw", "BGRX") b = PIL.ImageStat.Stat(o_pil_image_rgb).mean b=map(int, b) r=b[0]*255 g=b[1]*255 b=b[2]*255 color = self.colormap.alloc_color(r,g,b) xor_color = color.pixel ^ 0xffffff self.gc = self.window.create_gc( foreground = xor_color, function = X.GXxor ) skip=1 #print "not skipping" elif skip==1: skip=0 #print "skipped" self.window.point(self.gc,h,k) h+=1 i+=1 j+=1 i=10 k+=1 h=10 elif e.type == X.KeyPress: raise SystemExit </code></pre>
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    1. COHi, could you provide a bit more detailed explanation with your code? The part "i need a certain area of the screen to be drawn in my app" I understood, but you could at least try to explain a bit the code you posted and give a small working example?
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    2. CObasically in my loop function..i a first obtaining the color of the pixels on the screen where i and j are screen coordinates...then i am creating a new color for every pixel, and then printing a pixel with the new form color...this process is very slow...
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    3. COWell, you should be looping over pixels like that. Instead use functions to operate on the whole buffer at once. See http://www.blog.pythonlibrary.org/2010/04/16/how-to-take-a-screenshot-of-your-wxpython-app-and-print-it/ and http://stackoverflow.com/questions/69645/take-a-screenshot-via-a-python-script-linux to help you on the way.
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