mirror of https://github.com/python/cpython.git
79 lines
2.2 KiB
Python
79 lines
2.2 KiB
Python
|
# Class to grab frames from a window.
|
||
|
|
# (This has fewer user-settable parameters than Displayer.)
|
||
|
|
# It is the caller's responsibility to initialize the window and to
|
||
|
|
# ensure that it is current when using grabframe()
|
||
|
|
|
||
|
|
import gl, GL
|
||
|
|
import VFile
|
||
|
|
import GET
|
||
|
|
from VFile import Error
|
||
|
|
|
||
|
|
class VGrabber(VFile.VideoParams):
|
||
|
|
|
||
|
|
# XXX The init() method of VideoParams is just fine, for now
|
||
|
|
|
||
|
|
# Grab a frame.
|
||
|
|
# Return (data, chromdata) just like getnextframe().
|
||
|
|
|
||
|
|
def grabframe(self):
|
||
|
|
grabber = choose_grabber(self.format)
|
||
|
|
return grabber(self.width, self.height, self.packfactor)
|
||
|
|
|
||
|
|
|
||
|
|
# Choose one of the grabber functions below based upon a color system name
|
||
|
|
|
||
|
|
def choose_grabber(format):
|
||
|
|
try:
|
||
|
|
return eval('grab_' + format)
|
||
|
|
except:
|
||
|
|
raise Error, 'Unknown color system: ' + `format`
|
||
|
|
|
||
|
|
|
||
|
|
# Routines to grab data, per color system (only a few really supported).
|
||
|
|
# (These functions are used via eval with a constructed argument!)
|
||
|
|
|
||
|
|
def grab_rgb(w, h, pf):
|
||
|
|
if gl.getdisplaymode() <> GET.DMRGB:
|
||
|
|
raise Error, 'Sorry, can only grab rgb in single-buf rgbmode'
|
||
|
|
if pf <> (1, 1):
|
||
|
|
raise Error, 'Sorry, only grab rgb with packfactor (1,1)'
|
||
|
|
return gl.lrectread(0, 0, w-1, h-1), None
|
||
|
|
|
||
|
|
def grab_rgb8(w, h, pf):
|
||
|
|
if gl.getdisplaymode() <> GET.DMRGB:
|
||
|
|
raise Error, 'Sorry, can only grab rgb8 in single-buf rgbmode'
|
||
|
|
if pf <> (1, 1):
|
||
|
|
raise Error, 'Sorry, can only grab rgb8 with packfactor (1,1)'
|
||
|
|
if not VFile.is_entry_indigo():
|
||
|
|
raise Error, 'Sorry, can only grab rgb8 on entry level Indigo'
|
||
|
|
# XXX Dirty Dirty here.
|
||
|
|
# XXX Set buffer to cmap mode, grab image and set it back.
|
||
|
|
gl.cmode()
|
||
|
|
gl.gconfig()
|
||
|
|
gl.pixmode(GL.PM_SIZE, 8)
|
||
|
|
data = gl.lrectread(0, 0, w-1, h-1)
|
||
|
|
data = data[:w*h] # BUG FIX for python lrectread
|
||
|
|
gl.RGBmode()
|
||
|
|
gl.gconfig()
|
||
|
|
gl.pixmode(GL.PM_SIZE, 32)
|
||
|
|
return data, None
|
||
|
|
|
||
|
|
def grab_grey(w, h, pf):
|
||
|
|
raise Error, 'Sorry, grabbing grey not implemented'
|
||
|
|
|
||
|
|
def grab_yiq(w, h, pf):
|
||
|
|
raise Error, 'Sorry, grabbing yiq not implemented'
|
||
|
|
|
||
|
|
def grab_hls(w, h, pf):
|
||
|
|
raise Error, 'Sorry, grabbing hls not implemented'
|
||
|
|
|
||
|
|
def grab_hsv(w, h, pf):
|
||
|
|
raise Error, 'Sorry, grabbing hsv not implemented'
|
||
|
|
|
||
|
|
def grab_jpeg(w, h, pf):
|
||
|
|
# XXX Ought to grab rgb and compress it
|
||
|
|
raise Error, 'sorry, grabbing jpeg not implemented'
|
||
|
|
|
||
|
|
def grab_jpeggrey(w, h, pf):
|
||
|
|
raise Error, 'sorry, grabbing jpeggrey not implemented'
|