def loadAsOverlay (source, topixel, imgheight):
headers, cols, recs = readtable (source, stmapping ())
compact = []
for rec in recs:
y, x = topixel ([rec.dec, rec.ra])
if not hasattr (rec, 'major') or rec.major is None or rec.major == 0:
compact.append ((x, y))
continue
# TODO: draw Gaussians with the right shape
compact.append ((x, y))
def drawoverlay (ctxt, width, height, x0, y0, d2p):
ctxt.set_source_rgb (255, 0, 0)
for dx, dy in compact:
cx = (dx + 0.5 - x0) * d2p
cy = (imgheight - dy - 0.5 - y0) * d2p
ctxt.move_to (cx - 5, cy)
ctxt.line_to (cx + 5, cy)
ctxt.stroke ()
ctxt.move_to (cx, cy - 5)
ctxt.line_to (cx, cy + 5)
ctxt.stroke ()
return drawoverlay
def readst (source, recfactory=Holder, **kwargs):
return readtable (source, stmapping (**kwargs), recfactory=recfactory)
