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import base64
import rsvg
import re
import os
import cairo
import gc
import gtk
from hashlib import md5
import time
from time import strftime
from sugar import util
import _camera
def getStringFromPixbuf(pixbuf):
data = [""]
pixbuf.save_to_callback(_saveDataToBufferCb, "png", {}, data)
return base64.b64encode(str(data[0]))
def _saveDataToBufferCb(buf, data):
data[0] += buf
return True
def getPixbufFromString(str):
pbl = gtk.gdk.PixbufLoader()
data = base64.b64decode( str )
pbl.write(data)
pbl.close()
return pbl.get_pixbuf()
def loadSvg( data, stroke, fill ):
if ((stroke == None) or (fill == None)):
return rsvg.Handle( data=data )
entity = '<!ENTITY fill_color "%s">' % fill
data = re.sub('<!ENTITY fill_color .*>', entity, data)
entity = '<!ENTITY stroke_color "%s">' % stroke
data = re.sub('<!ENTITY stroke_color .*>', entity, data)
return rsvg.Handle( data=data )
def getUniqueFilepath( path, i ):
pathOb = os.path.abspath( path )
newPath = os.path.join( os.path.dirname(pathOb), str( str(i) + os.path.basename(pathOb) ) )
if (os.path.exists(newPath)):
i = i + 1
return getUniqueFilepath( pathOb, i )
else:
return os.path.abspath( newPath )
def md5File( filepath ):
md = md5()
f = file( filepath, 'rb' )
md.update( f.read() )
digest = md.hexdigest()
hash = util.printable_hash(digest)
return hash
def generateThumbnail( pixbuf, scale, thumbw, thumbh ):
#need to generate thumbnail version here
thumbImg = cairo.ImageSurface(cairo.FORMAT_ARGB32, thumbw, thumbh)
tctx = cairo.Context(thumbImg)
img = _camera.cairo_surface_from_gdk_pixbuf(pixbuf)
tctx.scale(scale, scale)
tctx.set_source_surface(img, 0, 0)
tctx.paint()
gc.collect()
return thumbImg
def scaleSvgToDim( handle, dim ):
#todo...
scale = 1.0
svgDim = handle.get_dimension_data()
if (svgDim[0] > dim[0]):
pass
return scale
def getDateString( when ):
#todo: internationalize the date
return strftime( "%a, %b %d, %I:%M:%S %p", time.localtime(when) )
def grayScalePixBuf2( pb, copy ):
arr = pb.get_pixels_array()
if (copy):
arr = arr.copy()
for row in arr:
for pxl in row:
y = 0.3*pxl[0][0]+0.59*pxl[1][0]+0.11*pxl[2][0]
pxl[0][0] = y
pxl[1][0] = y
pxl[2][0] = y
return gtk.gdk.pixbuf_new_from_array(arr, pb.get_colorspace(), pb.get_bits_per_sample())
def grayScalePixBuf( pb, copy ):
pb2 = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, False, 8, pb.get_width(), pb.get_height())
pb.saturate_and_pixelate(pb2, 0, 0)
return pb2
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