From fd4089dae9807baf3b2b7aab853b8ee04f1468b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rapha=C3=ABl=20Vinot?= <raphael@vinot.info>
Date: Thu, 5 Mar 2015 22:58:41 +0100
Subject: [PATCH] fix the unsigned byte issue.

---
 .../processing/pic2serialpy/pic2serialpy.pyde     |   9 +++++----
 v2/backend/processing/pic2serialpy/test2.png      | Bin 0 -> 148 bytes
 2 files changed, 5 insertions(+), 4 deletions(-)
 create mode 100644 v2/backend/processing/pic2serialpy/test2.png

diff --git a/v2/backend/processing/pic2serialpy/pic2serialpy.pyde b/v2/backend/processing/pic2serialpy/pic2serialpy.pyde
index 5186e31..8b119ad 100644
--- a/v2/backend/processing/pic2serialpy/pic2serialpy.pyde
+++ b/v2/backend/processing/pic2serialpy/pic2serialpy.pyde
@@ -26,7 +26,7 @@ def setup():
     gammatable = [math.pow(i / 255.0, gamma) * 255.0 + 0.5 for i in range(0, 256)]
     
     size(40, 1)
-    img = loadImage("test1.png")
+    img = loadImage("test2.png")
 
 def image2data(data):
     offset = 0
@@ -38,8 +38,9 @@ def image2data(data):
             for i in range(0, 8):
                 if ((pixel[i] & imgmask) != 0):
                     b |= (1 << i)
-            if b == 255:
-                b = -1
+            if b > 127:
+                # Convert to signed bytes (expected by jarray)
+                b -= 2**8
             data[offset] = b
             offset += 1
             imgmask >>= 1
@@ -89,7 +90,7 @@ def draw():
     data[0] = ord('*')
     framerate = 30.0
     usec = int((1000000.0 / framerate) * 0.75)
-    data[1] = usec /2000
+    data[1] = (usec % 256) - 2**8
     data[2] = usec >> 8
     ledSerial.write(data)
     
diff --git a/v2/backend/processing/pic2serialpy/test2.png b/v2/backend/processing/pic2serialpy/test2.png
new file mode 100644
index 0000000000000000000000000000000000000000..719ed64402c0607360798d0f5a1981dc17dd2477
GIT binary patch
literal 148
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z;_2(kexI3D)Pf@>`}QlKkYtH#M2T~LZf<H`34?P{YGO%hib8p2Nrr;Er*A-bBcC`>
o5uc}vV+hCf<UjI<95@*mf@d;@CbBiN0c99GUHx3vIVCg!0Dtl!^Z)<=

literal 0
HcmV?d00001