From 4d2403f9137f81fed77d24bc6c7f0160b79fdbb2 Mon Sep 17 00:00:00 2001
From: Jan Luebbe <jluebbe@debian.org>
Date: Sun, 4 May 2014 02:44:02 +0200
Subject: [PATCH] Compare agains previous frame to save bandwidth
---
python/font_client.py | 26 +++++++++++++++++++++++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/python/font_client.py b/python/font_client.py
index 4869f89..13f80ee 100755
--- a/python/font_client.py
+++ b/python/font_client.py
@@ -7,16 +7,36 @@ pygame.init()
screen = pygame.Surface((client.WIDTH, client.HEIGHT), depth=8)
+prev_screen = None
+
def send(screen):
+ global prev_screen
w = screen.get_width()
h = screen.get_height()
pxarray = pygame.PixelArray(screen)
+ if prev_screen:
+ prev_pxarray = pygame.PixelArray(prev_screen)
+ xs = set()
+ ys = set()
+ for y in range(h):
+ for x in range(w):
+ if not pxarray[x][y] == prev_pxarray[x][y]:
+ xs.add(x)
+ ys.add(y)
+ else:
+ xs = set((0, client.WIDTH-1))
+ ys = set((0, client.HEIGHT-1))
+
+ if not xs:
+ return
+ prev_screen = screen.copy()
+
pixels = []
- for y in range(h):
- for x in range(w):
+ for y in range(min(ys), max(ys)+1):
+ for x in range(min(xs), max(xs)+1):
pixels.append(pxarray[x][y])
del pxarray
- client.blit(0, 0, w, h, pixels)
+ client.blit(min(xs), min(ys), max(xs)-min(xs)+1, max(ys)-min(ys)+1, pixels)
prev_mx = None
font = None
--
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