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