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Changes for supporting monochrome and greyscale video (not yet fully

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functional)
This commit is contained in:
Jack Jansen 1992-12-14 12:25:21 +00:00
parent cf5dd9cbfd
commit 3b25371ef1
7 changed files with 185 additions and 46 deletions
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11
Demo/sgi/video/VFile.py
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@ -73,6 +73,7 @@ def conv_jpeg(r, g, b):
raise Error, 'Attempt to make RGB colormap (jpeg)'
conv_jpeggrey = conv_grey
conv_mono = conv_grey
# Choose one of the above based upon a color system name
@ -213,7 +214,8 @@ class VideoParams:
def init(self):
# Essential parameters
self.format = 'grey' # color system used
# Choose from: grey, rgb, rgb8, hsv, yiq, hls, jpeg, jpeggrey
# Choose from: grey, rgb, rgb8, hsv, yiq, hls, jpeg, jpeggrey,
# mono
self.width = 0 # width of frame
self.height = 0 # height of frame
self.packfactor = 1 # expansion using rectzoom
@ -315,6 +317,9 @@ class Displayer(VideoParams):
p = pf
if (width, height, bytes) <> (w/p, h/p, b):
raise Error, 'jpeg data has wrong size'
elif self.format == 'mono':
import imageop
data = imageop.mono2grey(data, w, h, 0x20, 0xdf)
if not self.colormapinited:
self.initcolormap()
if self.fixcolor0:
@ -544,7 +549,7 @@ def readfileheader(fp, filename):
c0bits = c1bits = c2bits = 0
chrompack = 0
offset = 0
elif format in ('grey', 'jpeggrey'):
elif format in ('grey', 'jpeggrey', 'mono'):
c0bits = rest
c1bits = c2bits = 0
chrompack = 0
@ -642,7 +647,7 @@ def writefileheader(fp, values):
#
if format in ('rgb', 'jpeg'):
data = (format, 0)
elif format in ('grey', 'jpeggrey'):
elif format in ('grey', 'jpeggrey', 'mono'):
data = (format, c0bits)
else:
data = (format, (c0bits, c1bits, c2bits, chrompack, offset))