This is some more, even more horrible, code for handling windows
screengrabs. (In CANVAS we grab screenshots using a little proglet we
inject into a remote process, but it does sound similar to what
you're doing here.)
You can view resultant images like so, under Linux:
self.log("Result: display -depth 8 -size %sx%s
rgb:%s"%(hor,vert,filename))
I included some code we use to display it in a little window as well
- this is known to work under Windows or Linux.
-dave
#Immunity grants this snippet under Python Licence
def update_Images(self, area, event):
self.pangolayout = self.area.create_pango_layout("")
self.style = self.area.get_style()
self.gc = self.style.fg_gc[gtk.STATE_NORMAL]
self.gc = self.style.black_gc
buff= self.read_Image(self.filename)
if self.area.window == None:
return
self.area.window.draw_rgb_image(self.gc, 0, 0, self.Iwidth,
self.Iheight,
gtk.gdk.RGB_DITHER_NONE, buff,
self.Iwidth*3)
self.area.window.draw_layout(self.gc, 0, 0, self.pangolayout)
self.area.show()
def show_Images(self, obj, event):
if event.type==gtk.gdk._2BUTTON_PRESS:
model,iter=self.iTree.get_selection().get_selected()
if not iter:
return
description = model.get_value(iter,2)
self.filename = model.get_value(iter,0)
wTemp = gtk.glade.XML("canvasgui2.glade","sImage")
window=wTemp.get_widget("sImage")
window.set_title(description)
(width,height) = description.split(" ", 1)[0].split("x")
self.Iwidth=int(width)
self.Iheight=int(height)
#print "Image width=%d height=%d"%(self.Iwidth,self.Iheight)
self.area = wTemp.get_widget("drawingarea2")
self.area.set_size_request(self.Iwidth, self.Iheight)
# This is the trick to make a DrawImage works
self.area.connect("expose_event", self.update_Images)
def normalizergb(x,y,data,alpha=3):
"""
Windows screengrabs are in BGRA order, and need to be flipped
Set alpha=3 for no alpha, 4 for alpha
"""
print "Normalizing RGB for win32"
ret=[]
length=len(data)
if length%alpha!=0:
print "Very strange - is not mod %s clean!"%alpha
for i in range(0,y):
#for each scanline
for j in range (0,x):
#for each pixel
#print "Doing: %s:%s"%(i,j)
b=data[x*i*alpha +alpha*j+0]
g=data[x*i*alpha +alpha*j+1]
r=data[x*i*alpha +alpha*j+2]
ret+=[r,g,b]
data="".join(ret)
print "Returning %s"%len(data)
return data
def verticleflip(x,y,data,alpha=3):
"""
Windows screenshots need to be flipped verticly
alpha=4 for alpha byte as well
"""
print "Flipping verticly"
i=0
ret=[]
length=len(data)
if length%alpha!=0:
print "Very strange - is not mod %s clean!"%alpha
while i<length:
line=data[i:i+x*alpha]
ret=[line]+ret
i+=x*alpha
return "".join(ret)
