Warn if stride not a multiple of 4 bytes; use PM_SIZE instead of 5.

diff --git a/Demo/sgi/video/video.py b/Demo/sgi/video/video.py
index 2b50e396587079d59a87d2298248e000c9eaec2c..4469329444a07167ccaeb83af8529e7bfb12b173 100755 (executable)
--- a/Demo/sgi/video/video.py
+++ b/Demo/sgi/video/video.py
@@ -40,6 +40,9 @@ def openvideo(name):
     x = eval(line[:-1])
     if len(x) == 3: w, h, pf = x
     else: w, h = x; pf = 2
+    if pf and w/pf % 4 <> 0:
+        sys.stderr.write( \
+       'warning: stride not a multiple of 4 -- may not work on Indigo XS\n')
     return f, w, h, pf, colorinfo
 
 def loadframe(f,w,h,pf,af,spkr, (ybits,ibits,qbits,chrompack),mf):
@@ -66,11 +69,11 @@ def loadframe(f,w,h,pf,af,spkr, (ybits,ibits,qbits,chrompack),mf):
        ch = (h+chrompack-1)/chrompack
        chromdata = f.read(2*cw*ch)
        rectzoom(pf*chrompack*mf,pf*chrompack*mf)
-       pixmode(5,16)
+       pixmode(PM_SIZE,16)
        writemask(0x7ff - ((1<<ybits)-1))
        lrectwrite(0,0,cw-1,ch-1,chromdata)
        writemask((1<<ybits)-1)
-       pixmode(5,8)
+       pixmode(PM_SIZE,8)
     if pf:
        rectzoom(pf*mf, pf*mf)
     elif mf <> 1:
@@ -166,7 +169,7 @@ def main():
            color(2048)
            clear()
            writemask(2047)
-           pixmode(5,8)        # 8 bit pixels
+           pixmode(PM_SIZE,8)  # 8 bit pixels
        qdevice(ESCKEY)
        qdevice(WINSHUT)
        qdevice(WINQUIT)